feat: split token counters and hour-resolution usage history

Data layer for the upcoming Vue admin charts (v0.2 data-layer task).

Tokens-in/out split (limits.go): metricTok replaced by metricTokIn
("tokin") and metricTokOut ("tokout"). account() records usage.prompt
and usage.completion independently, skipping a direction only when its
own value is zero. A TokensPerDay/TokensPerMonth limit still enforces
one TOTAL budget: tokenBudgetViolation reads both counters in one
storeGetMulti batch and sums them; the violation message still says
"tokens". Estimated usage (the request-body-size fallback) lands
entirely in tokin, documented at its call site.

Hour window (limits.go): windowHour ("hour"), bucket format
"2006010215" UTC, hourWindowTTL (48h). checkAndCount/account both write
it on every metered route; no LimitsConfig field ever names it, so
evaluateScope never evaluates it. dayWindowTTL/monthWindowTTL bumped to
35d/400d so the usage-history API's largest span always finds a live
key.

Total scope (limits.go, routes_unified.go): a synthetic
{kind:"total", id:"all"} scope, limits always nil. withTotalScope
wraps buildLimitScopes' result at every metered route (unified,
media, passthrough, mcp/a2a) so none can forget it; handleAdminAPI's
own accounting stays on buildLimitScopes alone, so admin traffic never
contributes to it.

History API (admin.go): GET /admin/api/usage/history?scope=&metric=&
window=&span= — admin-gated like the other two JSON routes, but
skips checkAndCount ahead of that same change landing for every
/admin/api/* route in a later task. Validates scope kind/metric/window
(400), span bounds per window (400), and unknown user/group id (404).
Computes every bucket key up front and reads them in ONE storeGetMulti
batch; a storeDown read is 503, never a silently-zero series. Works
against memoryStore too.

Admin usage API (admin.go): scopeUsage/adminUsageEntryView now expose
tokensInPerDay/tokensOutPerDay and their per-month counterparts in
place of the combined tokensPerDay/tokensPerMonth pair; buildAdminUsage
adds a "total" row to the response, still one storeGetMulti round trip
overall. usageKeysPerScope names the per-scope key stride (was a bare
6, now 8), closing a deferred review follow-up while the count changed
anyway.

Tests: TDD throughout — bucket/window-key math incl. UTC and hour
boundaries, the month step-back day-31 AddDate trap, split accounting,
token budget summing both directions, total-scope counting-without-
evaluating on every metered route, and the full history API (shape,
oldest-first, span bounds, validation table, 404, 503, one-batch
assertion via a counting stub). Integration: TestAdminDashboard now
fetches an hour history series for user alice and for total and
asserts a non-zero current-hour bucket.

Migration: none — old "tok" counter keys simply expire on their
existing TTL; nothing is deployed yet.
This commit is contained in:
2026-08-21 00:33:41 +01:00
parent 611e9c04bc
commit 08cfdb4d99
13 changed files with 1317 additions and 176 deletions
+260 -42
View File
@@ -2,20 +2,23 @@ package traefikllmgateway
import (
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"strconv"
"strings"
"time"
)
// The three routes the read-only admin dashboard registers (spec §4,
// v0.2), matched only when adminEnabled(g.cfg) — see llmgateway.go's
// ServeHTTP dispatch.
// The four routes the read-only admin dashboard registers (spec §4, v0.2;
// adminUsageHistoryPath added by the v0.2 data-layer task), matched only
// when adminEnabled(g.cfg) — see llmgateway.go's ServeHTTP dispatch.
const (
adminPagePath = "/admin"
adminOverviewPath = "/admin/api/overview"
adminUsagePath = "/admin/api/usage"
adminPagePath = "/admin"
adminOverviewPath = "/admin/api/overview"
adminUsagePath = "/admin/api/usage"
adminUsageHistoryPath = "/admin/api/usage/history"
)
// adminCSP is the Content-Security-Policy header served with all three
@@ -43,9 +46,9 @@ func adminEnabled(cfg *Config) bool {
return cfg.Admin != nil && cfg.Admin.Enabled
}
// isAdminPath reports whether path is one of the three admin routes.
// isAdminPath reports whether path is one of the four admin routes.
func isAdminPath(path string) bool {
return path == adminPagePath || path == adminOverviewPath || path == adminUsagePath
return path == adminPagePath || path == adminOverviewPath || path == adminUsagePath || path == adminUsageHistoryPath
}
// handleAdmin is ServeHTTP's single entry point for all three /admin*
@@ -70,13 +73,21 @@ func (g *Gateway) handleAdmin(sw *statusTrackingWriter, r *http.Request) {
g.handleAdminAPI(sw, r)
}
// handleAdminAPI is the gate for the two /admin/api/* JSON routes,
// handleAdminAPI is the gate for the three /admin/api/* JSON routes,
// applying spec §4's gate order: unauthenticated → 401, authenticated
// non-admin → 403, admin → serve. Like every other authenticated route
// it counts request counters via checkAndCount before serving: an admin
// over their own req/min limit gets a 429 here exactly as they would on
// any other route (spec §4's "Accounting: admin routes count request
// counters like any authed route").
// non-admin → 403, admin → serve. GET /admin/api/overview and GET
// /admin/api/usage count request counters via checkAndCount before
// serving, like every other authenticated route: an admin over their own
// req/min limit gets a 429 here exactly as they would on any other route
// (spec §4's "Accounting: admin routes count request counters like any
// authed route").
//
// GET /admin/api/usage/history (v0.2 data-layer task) is the one
// exception: it skips checkAndCount entirely. The operator-directed
// removal of admin-route stat counting (progress ledger, 2026-08-20)
// lands for every /admin/api/* route in a later task; this new route is
// built consistent with that direction from the start, rather than
// counted now and un-counted later.
func (g *Gateway) handleAdminAPI(sw *statusTrackingWriter, r *http.Request) {
u, grp, ok := g.auth.identify(r)
g.logAuthEvent(ok, authEventUserName(u), r)
@@ -88,6 +99,12 @@ func (g *Gateway) handleAdminAPI(sw *statusTrackingWriter, r *http.Request) {
writeOAIError(sw, http.StatusForbidden, "invalid_request_error", "admin access required")
return
}
if r.URL.Path == adminUsageHistoryPath {
g.serveAdminUsageHistory(sw, r)
return
}
if violation := g.limiter.checkAndCount(buildLimitScopes(u, grp)); violation != nil {
writeLimitViolation(sw, violation)
return
@@ -322,12 +339,16 @@ func (g *Gateway) serveAdminOverview(w http.ResponseWriter) {
_ = json.NewEncoder(w).Encode(g.buildAdminOverview())
}
// adminUsageEntryView is one user's or group's row in GET
// /admin/api/usage (spec §4, v0.2): its current-window counter values,
// with its configured limit echoed beside each. GroupName is set only for
// a user entry (empty for a group entry) — the group a user currently
// belongs to, for display; it carries no access-control meaning of its
// own.
// adminUsageEntryView is one user's, group's, or the total scope's row in
// GET /admin/api/usage (spec §4, v0.2): its current-window counter
// values, with its configured limit echoed beside each. GroupName is set
// only for a user entry (empty for a group or the total entry) — the
// group a user currently belongs to, for display; it carries no
// access-control meaning of its own. TokensInPerDay/TokensOutPerDay and
// their per-month counterparts replace a single combined
// tokensPerDay/tokensPerMonth pair (v0.2 data-layer task, tokens-in/
// tokens-out split) — a client wanting the combined total sums the two
// itself.
type adminUsageEntryView struct {
Limits *LimitsConfig `json:"limits,omitempty"`
Kind string `json:"kind"`
@@ -335,8 +356,10 @@ type adminUsageEntryView struct {
GroupName string `json:"groupName,omitempty"`
RequestsPerMinute int64 `json:"requestsPerMinute"`
RequestsPerDay int64 `json:"requestsPerDay"`
TokensPerDay int64 `json:"tokensPerDay"`
TokensPerMonth int64 `json:"tokensPerMonth"`
TokensInPerDay int64 `json:"tokensInPerDay"`
TokensOutPerDay int64 `json:"tokensOutPerDay"`
TokensInPerMonth int64 `json:"tokensInPerMonth"`
TokensOutPerMonth int64 `json:"tokensOutPerMonth"`
CostPerDayMicroUSD int64 `json:"costPerDayMicroUsd"`
CostPerMonthMicroUSD int64 `json:"costPerMonthMicroUsd"`
StoreDown bool `json:"storeDown,omitempty"`
@@ -344,11 +367,14 @@ type adminUsageEntryView struct {
// adminUsageResponse is the full body of GET /admin/api/usage: every
// currently active user, and every configured group, each with its own
// usage+limits row. Both slices are sorted (authStore.snapshot's own
// contract) and built fresh per request.
// usage+limits row, plus the synthetic total scope's own row (v0.2
// data-layer task) — usage summed across every user and group combined,
// limits always nil (see totalScopeKind). Users and Groups are both
// sorted (authStore.snapshot's own contract) and built fresh per request.
type adminUsageResponse struct {
Users []adminUsageEntryView `json:"users"`
Groups []adminUsageEntryView `json:"groups"`
Total adminUsageEntryView `json:"total"`
}
// usageEntryView converts one limiter.currentUsage result plus its
@@ -360,8 +386,10 @@ func usageEntryView(su scopeUsage, limits *LimitsConfig) adminUsageEntryView {
Limits: limits,
RequestsPerMinute: su.requestsPerMinute,
RequestsPerDay: su.requestsPerDay,
TokensPerDay: su.tokensPerDay,
TokensPerMonth: su.tokensPerMonth,
TokensInPerDay: su.tokensInPerDay,
TokensOutPerDay: su.tokensOutPerDay,
TokensInPerMonth: su.tokensInPerMonth,
TokensOutPerMonth: su.tokensOutPerMonth,
CostPerDayMicroUSD: su.costPerDayMicros,
CostPerMonthMicroUSD: su.costPerMonthMicros,
StoreDown: su.storeDown,
@@ -371,28 +399,32 @@ func usageEntryView(su scopeUsage, limits *LimitsConfig) adminUsageEntryView {
// buildAdminUsage assembles adminUsageResponse: authStore.snapshot lists
// every currently active user and every configured group (names, group
// membership, and limits only — never a key or its digest), and
// limiter.currentUsage reads every one's six current-window counters in
// ONE storeGetMulti round trip total (v0.2 final review wave, 2026-08-20;
// see limiter.currentUsage's own doc comment for the tradeoff this
// supersedes) — users and groups are concatenated into a single scopes
// slice before that one call, then the flat result is sliced back into
// the two response sections at the same split point, order preserved.
// Unlike buildLimitScopes (routes_unified.go), this never omits an
// entity for having nil limits — the dashboard shows usage for every
// user and group, limited or not.
// limiter.currentUsage reads every one's current-window counters — plus
// the synthetic total scope's own (v0.2 data-layer task) — in ONE
// storeGetMulti round trip total (v0.2 final review wave, 2026-08-20; see
// limiter.currentUsage's own doc comment for the tradeoff this
// supersedes) — users, groups, and the total scope are concatenated into
// a single scopes slice before that one call, then the flat result is
// sliced back into the three response sections at the same split points,
// order preserved. Unlike buildLimitScopes (routes_unified.go), this
// never omits an entity for having nil limits — the dashboard shows usage
// for every user and group, limited or not.
func (g *Gateway) buildAdminUsage() adminUsageResponse {
userSummaries, groupSummaries := g.auth.snapshot()
scopes := make([]limitScope, 0, len(userSummaries)+len(groupSummaries))
scopes := make([]limitScope, 0, len(userSummaries)+len(groupSummaries)+1)
for _, us := range userSummaries {
scopes = append(scopes, limitScope{kind: "user", id: us.name, limits: us.limits})
}
for _, gs := range groupSummaries {
scopes = append(scopes, limitScope{kind: "group", id: gs.name, limits: gs.limits})
}
scopes = append(scopes, limitScope{kind: totalScopeKind, id: totalScopeID, limits: nil})
allUsage := g.limiter.currentUsage(scopes)
userUsage, groupUsage := allUsage[:len(userSummaries)], allUsage[len(userSummaries):]
userUsage := allUsage[:len(userSummaries)]
groupUsage := allUsage[len(userSummaries) : len(userSummaries)+len(groupSummaries)]
totalUsage := allUsage[len(userSummaries)+len(groupSummaries)]
users := make([]adminUsageEntryView, len(userUsage))
for i, su := range userUsage {
@@ -403,8 +435,9 @@ func (g *Gateway) buildAdminUsage() adminUsageResponse {
for i, su := range groupUsage {
groups[i] = usageEntryView(su, groupSummaries[i].limits)
}
total := usageEntryView(totalUsage, nil)
return adminUsageResponse{Users: users, Groups: groups}
return adminUsageResponse{Users: users, Groups: groups, Total: total}
}
// serveAdminUsage writes buildAdminUsage's result as JSON.
@@ -413,6 +446,189 @@ func (g *Gateway) serveAdminUsage(w http.ResponseWriter) {
_ = json.NewEncoder(w).Encode(g.buildAdminUsage())
}
// historyMaxSpan caps GET /admin/api/usage/history's span query parameter
// per window (v0.2 data-layer task), matching each window's own retention
// (limits.go: hourWindowTTL/dayWindowTTL/monthWindowTTL) rounded down to
// whole buckets: 48 hourly buckets, 35 daily buckets, 13 monthly buckets
// (a one-month margin over monthWindowTTL's 400*24h ≈ 13.3 months). A
// span beyond what its window's TTL could ever have kept alive would only
// echo zeros for the missing tail, so the cap keeps every requested
// bucket meaningful. window is assumed already validated by
// validHistoryWindow — the default case is a programming error, not a
// client input, mirroring windowKey/windowEnd's own panic convention.
func historyMaxSpan(window string) int {
switch window {
case windowHour:
return 48
case windowDay:
return 35
case windowMonth:
return 13
default:
panic(fmt.Sprintf("llmgateway: historyMaxSpan: unknown window %q", window))
}
}
// validHistoryMetric reports whether metric is one of GET
// /admin/api/usage/history's four accepted metric values.
func validHistoryMetric(metric string) bool {
switch metric {
case metricReq, metricTokIn, metricTokOut, metricCost:
return true
default:
return false
}
}
// validHistoryWindow reports whether window is one of GET
// /admin/api/usage/history's three accepted window values.
func validHistoryWindow(window string) bool {
switch window {
case windowHour, windowDay, windowMonth:
return true
default:
return false
}
}
// parseHistoryScope parses GET /admin/api/usage/history's "scope" query
// parameter: "user:{id}", "group:{id}", or the literal "total". ok is
// false for anything else, including a bare "total:{id}" form — the total
// scope carries no id component of its own, it is always totalScopeID
// (limits.go).
func parseHistoryScope(raw string) (kind, id string, ok bool) {
if raw == totalScopeKind {
return totalScopeKind, totalScopeID, true
}
k, i, found := strings.Cut(raw, ":")
if !found || i == "" {
return "", "", false
}
if k != "user" && k != "group" {
return "", "", false
}
return k, i, true
}
// parseHistorySpan parses GET /admin/api/usage/history's "span" query
// parameter for window: an empty raw value defaults to window's own
// historyMaxSpan; otherwise raw must parse as an integer between 1 and
// that max inclusive. ok is false for anything else — a non-integer, a
// value below 1, or a value beyond window's max.
func parseHistorySpan(raw, window string) (span int, ok bool) {
max := historyMaxSpan(window)
if raw == "" {
return max, true
}
n, err := strconv.Atoi(raw)
if err != nil || n < 1 || n > max {
return 0, false
}
return n, true
}
// scopeExists reports whether kind/id names a currently active user or a
// configured group — GET /admin/api/usage/history's 404 check for an
// unknown scope id. authStore.snapshot's own listing is the same
// membership buildAdminUsage already trusts for "every currently active
// user and every configured group"; kind is assumed already restricted to
// "user" or "group" by parseHistoryScope (the total scope's id is never
// checked against it — totalScopeID always exists).
func (g *Gateway) scopeExists(kind, id string) bool {
users, groups := g.auth.snapshot()
switch kind {
case "user":
for _, u := range users {
if u.name == id {
return true
}
}
case "group":
for _, gr := range groups {
if gr.name == id {
return true
}
}
}
return false
}
// usageHistoryPointView is one bucket in GET /admin/api/usage/history's
// points array.
type usageHistoryPointView struct {
Bucket string `json:"bucket"`
Value int64 `json:"value"`
}
// usageHistoryResponse is the full body of GET /admin/api/usage/history
// (v0.2 data-layer task): scope/metric/window echoed back exactly as
// validated (scope in its raw "user:{id}"/"group:{id}"/"total" query
// form), plus span buckets oldest-first — Points[len-1] is the current,
// possibly partial, bucket.
type usageHistoryResponse struct {
Scope string `json:"scope"`
Metric string `json:"metric"`
Window string `json:"window"`
Points []usageHistoryPointView `json:"points"`
}
// serveAdminUsageHistory writes GET /admin/api/usage/history's bucketed
// series for one scope/metric/window (v0.2 data-layer task, the Vue admin
// panel's chart data source): "scope"=user:{id}|group:{id}|total,
// "metric"=req|tokin|tokout|cost, "window"=hour|day|month, optional
// "span"=N (default and max per historyMaxSpan). Validates every
// parameter before touching the store — 400 for an unrecognized scope
// kind/metric/window or an out-of-range span, 404 for a user/group id
// that names no configured entity — then reads the series via
// limiter.history, ONE storeGetMulti round trip for the whole span. A
// storeDown read answers 503, not a silently-zero series: a chart built
// on this API must never mistake "the store was unreachable" for "usage
// was genuinely zero". checkAndCount is deliberately never called here —
// see handleAdminAPI's own doc comment.
func (g *Gateway) serveAdminUsageHistory(sw *statusTrackingWriter, r *http.Request) {
q := r.URL.Query()
rawScope := q.Get("scope")
kind, id, ok := parseHistoryScope(rawScope)
if !ok {
writeOAIError(sw, http.StatusBadRequest, "invalid_request_error", "unknown scope")
return
}
metric := q.Get("metric")
if !validHistoryMetric(metric) {
writeOAIError(sw, http.StatusBadRequest, "invalid_request_error", "unknown metric")
return
}
window := q.Get("window")
if !validHistoryWindow(window) {
writeOAIError(sw, http.StatusBadRequest, "invalid_request_error", "unknown window")
return
}
span, ok := parseHistorySpan(q.Get("span"), window)
if !ok {
writeOAIError(sw, http.StatusBadRequest, "invalid_request_error", "invalid span")
return
}
if kind != totalScopeKind && !g.scopeExists(kind, id) {
writeOAIError(sw, http.StatusNotFound, "invalid_request_error", "unknown "+kind+" id")
return
}
points, storeOK := g.limiter.history(kind, id, metric, window, g.limiter.now(), span)
if !storeOK {
writeOAIError(sw, http.StatusServiceUnavailable, "server_error", "usage history store unavailable")
return
}
view := make([]usageHistoryPointView, len(points))
for i, p := range points {
view[i] = usageHistoryPointView{Bucket: p.bucket, Value: p.value}
}
setAdminJSONHeaders(sw)
_ = json.NewEncoder(sw).Encode(usageHistoryResponse{Scope: rawScope, Metric: metric, Window: window, Points: view})
}
// adminPageHTML is the entire /admin single-page dashboard: markup, CSS,
// and vanilla JS in one Go raw-string const. Yaegi interpretation forbids
// the embed directive (no filesystem access from an interpreted plugin),
@@ -531,14 +747,14 @@ const adminPageHTML = `<!doctype html>
<section>
<h2>Groups</h2>
<table id="groups"><thead><tr>
<th>Name</th><th>Members</th><th>Limits</th><th>req/min</th><th>req/day</th><th>tok/day</th><th>tok/month</th><th>cost/day</th><th>cost/month</th>
<th>Name</th><th>Members</th><th>Limits</th><th>req/min</th><th>req/day</th><th>tokIn/day</th><th>tokOut/day</th><th>tokIn/month</th><th>tokOut/month</th><th>cost/day</th><th>cost/month</th>
</tr></thead><tbody></tbody></table>
</section>
<section>
<h2>Users</h2>
<table id="users"><thead><tr>
<th>Name</th><th>Group</th><th>Limits</th><th>req/min</th><th>req/day</th><th>tok/day</th><th>tok/month</th><th>cost/day</th><th>cost/month</th>
<th>Name</th><th>Group</th><th>Limits</th><th>req/min</th><th>req/day</th><th>tokIn/day</th><th>tokOut/day</th><th>tokIn/month</th><th>tokOut/month</th><th>cost/day</th><th>cost/month</th>
</tr></thead><tbody></tbody></table>
</section>
@@ -660,8 +876,10 @@ const adminPageHTML = `<!doctype html>
tr.appendChild(el("td", fmtLimits(entry.limits)));
tr.appendChild(el("td", entry.storeDown ? "?" : String(entry.requestsPerMinute)));
tr.appendChild(el("td", entry.storeDown ? "?" : String(entry.requestsPerDay)));
tr.appendChild(el("td", entry.storeDown ? "?" : String(entry.tokensPerDay)));
tr.appendChild(el("td", entry.storeDown ? "?" : String(entry.tokensPerMonth)));
tr.appendChild(el("td", entry.storeDown ? "?" : String(entry.tokensInPerDay)));
tr.appendChild(el("td", entry.storeDown ? "?" : String(entry.tokensOutPerDay)));
tr.appendChild(el("td", entry.storeDown ? "?" : String(entry.tokensInPerMonth)));
tr.appendChild(el("td", entry.storeDown ? "?" : String(entry.tokensOutPerMonth)));
tr.appendChild(el("td", entry.storeDown ? "?" : fmtCost(entry.costPerDayMicroUsd)));
tr.appendChild(el("td", entry.storeDown ? "?" : fmtCost(entry.costPerMonthMicroUsd)));
if (entry.storeDown) tr.className = "err";
+291 -20
View File
@@ -381,6 +381,12 @@ func TestAdminUsage_MathAgainstSeededCounters(t *testing.T) {
gw.limiter.incrCounter("group", "agroup", metricReq, windowDay, fixedNow, 9, dayWindowTTL)
gw.limiter.account([]limitScope{{kind: "group", id: "agroup"}}, usage{prompt: 100, completion: 50}, 9_000_000)
// Seed the synthetic total scope directly too (v0.2 data-layer task):
// buildAdminUsage always includes it, independent of whether any
// route's withTotalScope call ever ran in this test.
gw.limiter.incrCounter(totalScopeKind, totalScopeID, metricReq, windowDay, fixedNow, 16, dayWindowTTL)
gw.limiter.account([]limitScope{{kind: totalScopeKind, id: totalScopeID}}, usage{prompt: 140, completion: 60}, 11_500_000)
rec := httptest.NewRecorder()
h.ServeHTTP(rec, adminRequest(http.MethodGet, adminUsagePath, "sk-admin1"))
if rec.Code != http.StatusOK {
@@ -396,8 +402,9 @@ func TestAdminUsage_MathAgainstSeededCounters(t *testing.T) {
if alice.RequestsPerMinute != 3 || alice.RequestsPerDay != 7 {
t.Errorf("alice requests = min:%d day:%d, want min:3 day:7", alice.RequestsPerMinute, alice.RequestsPerDay)
}
if alice.TokensPerDay != 50 || alice.TokensPerMonth != 50 {
t.Errorf("alice tokens = day:%d month:%d, want 50/50", alice.TokensPerDay, alice.TokensPerMonth)
if alice.TokensInPerDay != 40 || alice.TokensOutPerDay != 10 || alice.TokensInPerMonth != 40 || alice.TokensOutPerMonth != 10 {
t.Errorf("alice tokens = in/day:%d out/day:%d in/month:%d out/month:%d, want 40/10/40/10",
alice.TokensInPerDay, alice.TokensOutPerDay, alice.TokensInPerMonth, alice.TokensOutPerMonth)
}
if alice.CostPerDayMicroUSD != 2_500_000 || alice.CostPerMonthMicroUSD != 2_500_000 {
t.Errorf("alice cost = day:%d month:%d, want 2500000/2500000", alice.CostPerDayMicroUSD, alice.CostPerMonthMicroUSD)
@@ -416,8 +423,9 @@ func TestAdminUsage_MathAgainstSeededCounters(t *testing.T) {
if agroup.RequestsPerMinute != 5 || agroup.RequestsPerDay != 9 {
t.Errorf("agroup requests = min:%d day:%d, want min:5 day:9", agroup.RequestsPerMinute, agroup.RequestsPerDay)
}
if agroup.TokensPerDay != 150 || agroup.TokensPerMonth != 150 {
t.Errorf("agroup tokens = day:%d month:%d, want 150/150", agroup.TokensPerDay, agroup.TokensPerMonth)
if agroup.TokensInPerDay != 100 || agroup.TokensOutPerDay != 50 || agroup.TokensInPerMonth != 100 || agroup.TokensOutPerMonth != 50 {
t.Errorf("agroup tokens = in/day:%d out/day:%d in/month:%d out/month:%d, want 100/50/100/50",
agroup.TokensInPerDay, agroup.TokensOutPerDay, agroup.TokensInPerMonth, agroup.TokensOutPerMonth)
}
if agroup.CostPerDayMicroUSD != 9_000_000 {
t.Errorf("agroup cost/day = %d, want 9000000", agroup.CostPerDayMicroUSD)
@@ -435,6 +443,28 @@ func TestAdminUsage_MathAgainstSeededCounters(t *testing.T) {
if admin1.StoreDown {
t.Error("admin1.storeDown must be false")
}
// The synthetic total scope row (v0.2 data-layer task): present,
// carries no limit (limits.go's totalScopeKind is never evaluated),
// and reflects exactly the counters seeded above.
if got.Total.Kind != totalScopeKind || got.Total.ID != totalScopeID {
t.Errorf("total kind/id = %q/%q, want %q/%q", got.Total.Kind, got.Total.ID, totalScopeKind, totalScopeID)
}
if got.Total.Limits != nil {
t.Errorf("total limits = %+v, want nil (the total scope is never evaluated)", got.Total.Limits)
}
if got.Total.RequestsPerDay != 16 {
t.Errorf("total requestsPerDay = %d, want 16", got.Total.RequestsPerDay)
}
if got.Total.TokensInPerDay != 140 || got.Total.TokensOutPerDay != 60 {
t.Errorf("total tokens = in/day:%d out/day:%d, want 140/60", got.Total.TokensInPerDay, got.Total.TokensOutPerDay)
}
if got.Total.CostPerDayMicroUSD != 11_500_000 {
t.Errorf("total cost/day = %d, want 11500000", got.Total.CostPerDayMicroUSD)
}
if got.Total.StoreDown {
t.Error("total.storeDown must be false")
}
}
func findUsageEntry(t *testing.T, entries []adminUsageEntryView, id string) adminUsageEntryView {
@@ -466,8 +496,9 @@ func TestLimiterCurrentUsage_StoreDown(t *testing.T) {
if !su.storeDown {
t.Fatal("want storeDown true when the configured store errors and failOpen is false")
}
if su.requestsPerMinute != 0 || su.requestsPerDay != 0 || su.tokensPerDay != 0 ||
su.tokensPerMonth != 0 || su.costPerDayMicros != 0 || su.costPerMonthMicros != 0 {
if su.requestsPerMinute != 0 || su.requestsPerDay != 0 || su.tokensInPerDay != 0 ||
su.tokensInPerMonth != 0 || su.tokensOutPerDay != 0 || su.tokensOutPerMonth != 0 ||
su.costPerDayMicros != 0 || su.costPerMonthMicros != 0 {
t.Errorf("storeDown entry must report zero values, got %+v", su)
}
}
@@ -698,11 +729,11 @@ func TestAdminOverview_BaseURLStripsCredentials(t *testing.T) {
// countingMultiStore is a counterStore stub whose getMulti serves a fixed
// value per key and counts how many times it was called — it proves
// limiter.currentUsage flattens every scope's six counter reads into ONE
// getMulti call total (v0.2 final review wave, 2026-08-20), rather than
// six separate get calls or even one getMulti call per scope.
// incrBy/get are never exercised by currentUsage and just return zero
// values.
// limiter.currentUsage flattens every scope's usageKeysPerScope counter
// reads into ONE getMulti call total (v0.2 final review wave,
// 2026-08-20), rather than usageKeysPerScope separate get calls or even
// one getMulti call per scope. incrBy/get are never exercised by
// currentUsage and just return zero values.
type countingMultiStore struct {
values map[string]int64
getMultiCalls int
@@ -725,13 +756,15 @@ func TestLimiterCurrentUsage_BatchesOneGetMultiCallForAllScopes(t *testing.T) {
t.Parallel()
fixedNow := time.Date(2026, 8, 20, 10, 0, 0, 0, time.UTC)
store := &countingMultiStore{values: map[string]int64{
windowKey("user", "alice", metricReq, windowMin, fixedNow): 3,
windowKey("user", "alice", metricReq, windowDay, fixedNow): 7,
windowKey("user", "alice", metricTok, windowDay, fixedNow): 50,
windowKey("user", "alice", metricTok, windowMonth, fixedNow): 60,
windowKey("user", "alice", metricCost, windowDay, fixedNow): 1_000,
windowKey("user", "alice", metricCost, windowMonth, fixedNow): 2_000,
windowKey("group", "g1", metricReq, windowMin, fixedNow): 1,
windowKey("user", "alice", metricReq, windowMin, fixedNow): 3,
windowKey("user", "alice", metricReq, windowDay, fixedNow): 7,
windowKey("user", "alice", metricTokIn, windowDay, fixedNow): 50,
windowKey("user", "alice", metricTokIn, windowMonth, fixedNow): 60,
windowKey("user", "alice", metricTokOut, windowDay, fixedNow): 20,
windowKey("user", "alice", metricTokOut, windowMonth, fixedNow): 25,
windowKey("user", "alice", metricCost, windowDay, fixedNow): 1_000,
windowKey("user", "alice", metricCost, windowMonth, fixedNow): 2_000,
windowKey("group", "g1", metricReq, windowMin, fixedNow): 1,
}}
l := newLimiter(store, true)
l.nowFn = func() time.Time { return fixedNow }
@@ -752,8 +785,9 @@ func TestLimiterCurrentUsage_BatchesOneGetMultiCallForAllScopes(t *testing.T) {
if alice.storeDown {
t.Fatal("alice.storeDown must be false")
}
if alice.requestsPerMinute != 3 || alice.requestsPerDay != 7 || alice.tokensPerDay != 50 ||
alice.tokensPerMonth != 60 || alice.costPerDayMicros != 1_000 || alice.costPerMonthMicros != 2_000 {
if alice.requestsPerMinute != 3 || alice.requestsPerDay != 7 || alice.tokensInPerDay != 50 ||
alice.tokensInPerMonth != 60 || alice.tokensOutPerDay != 20 || alice.tokensOutPerMonth != 25 ||
alice.costPerDayMicros != 1_000 || alice.costPerMonthMicros != 2_000 {
t.Errorf("alice usage = %+v, want the seeded values", alice)
}
g1 := got[1]
@@ -839,3 +873,240 @@ func TestAdmin_FileUserAdminFlag_GrantsAccess(t *testing.T) {
t.Fatalf("status = %d, want 200 for a file-sourced admin user, body=%s", rec.Code, rec.Body.String())
}
}
// --- usage/history: gate, validation, shape, batching, storeDown (v0.2 data-layer task) ---
// TestAdminUsageHistory_GateMatrix mirrors TestAdmin_GateMatrix for the
// third /admin/api/* route: unauthenticated → 401, authenticated
// non-admin → 403, admin → 200.
func TestAdminUsageHistory_GateMatrix(t *testing.T) {
cfg := newAdminTestConfig()
h, _ := newAdminGatewayHandle(t, cfg)
query := adminUsageHistoryPath + "?scope=total&metric=req&window=hour"
t.Run("unauthenticated", func(t *testing.T) {
rec := httptest.NewRecorder()
h.ServeHTTP(rec, adminRequest(http.MethodGet, query, ""))
if rec.Code != http.StatusUnauthorized {
t.Fatalf("status = %d, want 401", rec.Code)
}
assertOAIErrorEnvelope(t, rec)
})
t.Run("authenticated_non_admin", func(t *testing.T) {
rec := httptest.NewRecorder()
h.ServeHTTP(rec, adminRequest(http.MethodGet, query, "sk-alice"))
if rec.Code != http.StatusForbidden {
t.Fatalf("status = %d, want 403", rec.Code)
}
assertOAIErrorEnvelope(t, rec)
})
t.Run("admin", func(t *testing.T) {
rec := httptest.NewRecorder()
h.ServeHTTP(rec, adminRequest(http.MethodGet, query, "sk-admin1"))
if rec.Code != http.StatusOK {
t.Fatalf("status = %d, want 200, body=%s", rec.Code, rec.Body.String())
}
})
}
// TestAdminUsageHistory_DoesNotCountStats proves GET
// /admin/api/usage/history skips checkAndCount entirely (unlike
// overview/usage — handleAdminAPI's own doc comment, admin.go): repeated
// requests never move admin1's own req/min counter, and the route stays
// reachable even once admin1 is already pinned at a requestsPerMinute
// limit tight enough to 429 on the other two admin routes.
func TestAdminUsageHistory_DoesNotCountStats(t *testing.T) {
cfg := newAdminTestConfig()
cfg.Users.Inline[1].Limits = &LimitsConfig{RequestsPerMinute: 1} // admin1
h, gw := newAdminGatewayHandle(t, cfg)
query := adminUsageHistoryPath + "?scope=total&metric=req&window=hour"
for i := 0; i < 5; i++ {
rec := httptest.NewRecorder()
h.ServeHTTP(rec, adminRequest(http.MethodGet, query, "sk-admin1"))
if rec.Code != http.StatusOK {
t.Fatalf("request %d: status = %d, want 200 (never 429), body=%s", i, rec.Code, rec.Body.String())
}
}
reqCount, ok := gw.limiter.getCounter("user", "admin1", metricReq, windowMin, time.Now())
if !ok || reqCount != 0 {
t.Errorf("admin1 req/min counter = %d (ok=%v), want 0 (history route never calls checkAndCount)", reqCount, ok)
}
}
// TestAdminUsageHistory_ValidationTable drives GET
// /admin/api/usage/history's query-parameter validation end to end: an
// unrecognized scope kind/metric/window or an out-of-range span is 400,
// an unknown user/group id is 404, and every well-formed combination
// (including span pinned exactly at its window's max) is 200.
func TestAdminUsageHistory_ValidationTable(t *testing.T) {
cfg := newAdminTestConfig()
h, _ := newAdminGatewayHandle(t, cfg)
cases := []struct {
name string
query string
want int
}{
{"unknown scope kind", "scope=nope&metric=req&window=hour", http.StatusBadRequest},
{"total scope rejects an id suffix", "scope=total:all&metric=req&window=hour", http.StatusBadRequest},
{"scope missing a colon", "scope=user&metric=req&window=hour", http.StatusBadRequest},
{"scope with an empty id", "scope=user:&metric=req&window=hour", http.StatusBadRequest},
{"unknown metric", "scope=total&metric=nope&window=hour", http.StatusBadRequest},
{"unknown window", "scope=total&metric=req&window=nope", http.StatusBadRequest},
{"span not an integer", "scope=total&metric=req&window=hour&span=abc", http.StatusBadRequest},
{"span zero", "scope=total&metric=req&window=hour&span=0", http.StatusBadRequest},
{"span negative", "scope=total&metric=req&window=hour&span=-1", http.StatusBadRequest},
{"span beyond hour max (48)", "scope=total&metric=req&window=hour&span=49", http.StatusBadRequest},
{"span beyond day max (35)", "scope=total&metric=req&window=day&span=36", http.StatusBadRequest},
{"span beyond month max (13)", "scope=total&metric=req&window=month&span=14", http.StatusBadRequest},
{"span pinned exactly at the hour max is valid", "scope=total&metric=req&window=hour&span=48", http.StatusOK},
{"unknown user id", "scope=user:ghost&metric=req&window=hour", http.StatusNotFound},
{"unknown group id", "scope=group:ghost&metric=req&window=hour", http.StatusNotFound},
{"valid total/req/hour, default span", "scope=total&metric=req&window=hour", http.StatusOK},
{"valid user/tokin/day", "scope=user:alice&metric=tokin&window=day", http.StatusOK},
{"valid group/tokout/month", "scope=group:agroup&metric=tokout&window=month", http.StatusOK},
{"valid cost metric", "scope=total&metric=cost&window=day", http.StatusOK},
}
for _, c := range cases {
t.Run(c.name, func(t *testing.T) {
rec := httptest.NewRecorder()
h.ServeHTTP(rec, adminRequest(http.MethodGet, adminUsageHistoryPath+"?"+c.query, "sk-admin1"))
if rec.Code != c.want {
t.Errorf("status = %d, want %d, body=%s", rec.Code, c.want, rec.Body.String())
}
if c.want >= 400 {
assertOAIErrorEnvelope(t, rec)
}
})
}
}
// TestAdminUsageHistory_DefaultSpanIsMax asserts an omitted span defaults
// to each window's own historyMaxSpan.
func TestAdminUsageHistory_DefaultSpanIsMax(t *testing.T) {
cfg := newAdminTestConfig()
h, _ := newAdminGatewayHandle(t, cfg)
cases := []struct {
window string
want int
}{
{windowHour, 48},
{windowDay, 35},
{windowMonth, 13},
}
for _, c := range cases {
t.Run(c.window, func(t *testing.T) {
rec := httptest.NewRecorder()
h.ServeHTTP(rec, adminRequest(http.MethodGet, adminUsageHistoryPath+"?scope=total&metric=req&window="+c.window, "sk-admin1"))
if rec.Code != http.StatusOK {
t.Fatalf("status = %d, want 200, body=%s", rec.Code, rec.Body.String())
}
var got usageHistoryResponse
if err := json.Unmarshal(rec.Body.Bytes(), &got); err != nil {
t.Fatalf("decode: %v", err)
}
if len(got.Points) != c.want {
t.Errorf("len(points) = %d, want %d (default span = max)", len(got.Points), c.want)
}
})
}
}
// TestAdminUsageHistory_ShapeOldestFirstOneBatchCall drives the route
// against a limiter whose store is swapped for a counting stub: it must
// decode to the documented {"scope","metric","window","points":[...]}
// shape, points must be oldest-first with the current (possibly partial)
// bucket last, and the whole span must cost exactly ONE getMulti call —
// never one call per bucket.
func TestAdminUsageHistory_ShapeOldestFirstOneBatchCall(t *testing.T) {
cfg := newAdminTestConfig()
h, gw := newAdminGatewayHandle(t, cfg)
fixedNow := time.Date(2026, 8, 20, 14, 0, 0, 0, time.UTC)
countStore := &countingMultiStore{values: map[string]int64{
windowKey(totalScopeKind, totalScopeID, metricReq, windowHour, fixedNow.Add(-2*time.Hour)): 5,
windowKey(totalScopeKind, totalScopeID, metricReq, windowHour, fixedNow.Add(-1*time.Hour)): 7,
windowKey(totalScopeKind, totalScopeID, metricReq, windowHour, fixedNow): 9,
}}
gw.limiter = newLimiter(countStore, true)
gw.limiter.nowFn = func() time.Time { return fixedNow }
rec := httptest.NewRecorder()
query := adminUsageHistoryPath + "?scope=total&metric=req&window=hour&span=3"
h.ServeHTTP(rec, adminRequest(http.MethodGet, query, "sk-admin1"))
if rec.Code != http.StatusOK {
t.Fatalf("status = %d, want 200, body=%s", rec.Code, rec.Body.String())
}
if countStore.getMultiCalls != 1 {
t.Errorf("getMultiCalls = %d, want 1 (one batch for the whole span)", countStore.getMultiCalls)
}
var got usageHistoryResponse
if err := json.Unmarshal(rec.Body.Bytes(), &got); err != nil {
t.Fatalf("decode: %v", err)
}
if got.Scope != "total" || got.Metric != "req" || got.Window != "hour" {
t.Errorf("echoed scope/metric/window = %q/%q/%q, want total/req/hour", got.Scope, got.Metric, got.Window)
}
if len(got.Points) != 3 {
t.Fatalf("len(points) = %d, want 3", len(got.Points))
}
wantValues := []int64{5, 7, 9}
for i, want := range wantValues {
if got.Points[i].Value != want {
t.Errorf("points[%d].value = %d, want %d (oldest-first)", i, got.Points[i].Value, want)
}
}
if got.Points[2].Bucket != bucketFor(fixedNow, windowHour) {
t.Errorf("points[2].bucket = %q, want the current bucket %q", got.Points[2].Bucket, bucketFor(fixedNow, windowHour))
}
}
// TestAdminUsageHistory_StoreDown503 asserts a fail-closed store error
// answers 503 with the standard OAI-shaped error envelope, never a
// silently-zero series — data unavailable beats a chart that lies about
// zero usage.
func TestAdminUsageHistory_StoreDown503(t *testing.T) {
cfg := newAdminTestConfig()
failOpen := false
cfg.Redis = &RedisConfig{Address: "127.0.0.1:1", FailOpen: &failOpen}
h, _ := newAdminGatewayHandle(t, cfg)
rec := httptest.NewRecorder()
query := adminUsageHistoryPath + "?scope=total&metric=req&window=hour"
h.ServeHTTP(rec, adminRequest(http.MethodGet, query, "sk-admin1"))
if rec.Code != http.StatusServiceUnavailable {
t.Fatalf("status = %d, want 503, body=%s", rec.Code, rec.Body.String())
}
assertOAIErrorEnvelope(t, rec)
}
// TestAdminUsageHistory_MemoryStoreFallbackWorks proves the history API
// serves real data through the in-process memoryStore fallback too — a
// deployment with no Redis configured at all still gets charts of
// whatever the process itself accumulated (spec's "memoryStore works
// too" requirement).
func TestAdminUsageHistory_MemoryStoreFallbackWorks(t *testing.T) {
cfg := newAdminTestConfig() // cfg.Redis left nil: limiter.store is nil, every op uses the fallback
h, gw := newAdminGatewayHandle(t, cfg)
fixedNow := time.Date(2026, 8, 20, 9, 0, 0, 0, time.UTC)
gw.limiter.nowFn = func() time.Time { return fixedNow }
gw.limiter.account([]limitScope{{kind: totalScopeKind, id: totalScopeID}}, usage{prompt: 12, completion: 4}, 0)
rec := httptest.NewRecorder()
query := adminUsageHistoryPath + "?scope=total&metric=tokin&window=hour&span=1"
h.ServeHTTP(rec, adminRequest(http.MethodGet, query, "sk-admin1"))
if rec.Code != http.StatusOK {
t.Fatalf("status = %d, want 200, body=%s", rec.Code, rec.Body.String())
}
var got usageHistoryResponse
if err := json.Unmarshal(rec.Body.Bytes(), &got); err != nil {
t.Fatalf("decode: %v", err)
}
if len(got.Points) != 1 || got.Points[0].Value != 12 {
t.Errorf("points = %+v, want one point with value 12", got.Points)
}
}
+50 -4
View File
@@ -757,6 +757,29 @@ func adminUsageEntry(t *testing.T, kind, id string) map[string]any {
return nil
}
// adminTotalTokensPerDay sums an admin usage entry's tokensInPerDay and
// tokensOutPerDay (v0.2 data-layer task: the JSON API split what was
// previously a single combined tokensPerDay field into in/out — see
// adminUsageEntryView, admin.go).
func adminTotalTokensPerDay(entry map[string]any) float64 {
in, _ := entry["tokensInPerDay"].(float64)
out, _ := entry["tokensOutPerDay"].(float64)
return in + out
}
// adminUsageHistory issues GET /admin/api/usage/history as adminKey for
// scope/metric/window and returns the decoded response body — the v0.2
// data-layer task's third admin API.
func adminUsageHistory(t *testing.T, scope, metric, window string) map[string]any {
t.Helper()
url := traefik1URL + "/admin/api/usage/history?scope=" + scope + "&metric=" + metric + "&window=" + window
resp, body := doJSON(t, http.MethodGet, url, adminKey, nil)
if resp.StatusCode != http.StatusOK {
t.Fatalf("GET /admin/api/usage/history (scope=%s metric=%s window=%s): status = %d, body=%#v", scope, metric, window, resp.StatusCode, body)
}
return body
}
// TestResponseCache covers v0.2 integration coverage: two identical chat
// completions get X-Llmgw-Cache: miss then hit, and the admin usage API
// (spec §4) proves the hit added zero tokens — only the miss's real
@@ -784,9 +807,9 @@ func TestResponseCache(t *testing.T) {
t.Error("redis holds no llmgw:cache:* key after a cache miss, want the entry the miss's SET (cache.go) should have written")
}
tokensAfterMiss, _ := adminUsageEntry(t, "users", "alice")["tokensPerDay"].(float64)
tokensAfterMiss := adminTotalTokensPerDay(adminUsageEntry(t, "users", "alice"))
if tokensAfterMiss <= 0 {
t.Fatalf("tokensPerDay after the miss = %v, want > 0 (the mock's real usage should have been accounted)", tokensAfterMiss)
t.Fatalf("tokensInPerDay+tokensOutPerDay after the miss = %v, want > 0 (the mock's real usage should have been accounted)", tokensAfterMiss)
}
resp2, body2 := doJSON(t, http.MethodPost, traefik1URL+"/v1/chat/completions", aliceKey, reqBody)
@@ -800,9 +823,9 @@ func TestResponseCache(t *testing.T) {
t.Errorf("second request: content = %q, want the cached %q", content, "mock openai response")
}
tokensAfterHit, _ := adminUsageEntry(t, "users", "alice")["tokensPerDay"].(float64)
tokensAfterHit := adminTotalTokensPerDay(adminUsageEntry(t, "users", "alice"))
if tokensAfterHit != tokensAfterMiss {
t.Errorf("tokensPerDay changed across the cache hit: after miss = %v, after hit = %v, want unchanged", tokensAfterMiss, tokensAfterHit)
t.Errorf("tokensInPerDay+tokensOutPerDay changed across the cache hit: after miss = %v, after hit = %v, want unchanged", tokensAfterMiss, tokensAfterHit)
}
}
@@ -978,4 +1001,27 @@ func TestAdminDashboard(t *testing.T) {
if reqDay, _ := adminUsage["requestsPerDay"].(float64); reqDay <= 0 {
t.Errorf("admin requestsPerDay = %v, want > 0 (this test's own admin API calls count too)", reqDay)
}
// v0.2 data-layer task: GET /admin/api/usage/history's hour series for
// alice and for the synthetic total scope both must show a non-zero
// current-hour bucket, reflecting the real LLM traffic this suite
// already generated (TestRetryFlakyRecovers, TestResponseCache, ...)
// against a real Redis-backed limiter, not just a unit-test stub.
for _, scope := range []string{"user:alice", "total"} {
hist := adminUsageHistory(t, scope, "req", "hour")
if got, _ := hist["scope"].(string); got != scope {
t.Errorf("history scope=%q: echoed scope = %q, want %q", scope, got, scope)
}
points, ok := hist["points"].([]any)
if !ok || len(points) == 0 {
t.Fatalf("history scope=%q: points = %#v, want a non-empty array", scope, hist["points"])
}
current, ok := points[len(points)-1].(map[string]any)
if !ok {
t.Fatalf("history scope=%q: last point is not an object, got %#v", scope, points[len(points)-1])
}
if val, _ := current["value"].(float64); val <= 0 {
t.Errorf("history scope=%q: current-hour bucket value = %v, want > 0 (this suite's own traffic)", scope, val)
}
}
}
+257 -70
View File
@@ -27,18 +27,30 @@ const storeErrorLogEvery = 30 * time.Second
const storeDownLatchFor = 5 * time.Second
// Window identifiers used throughout windowKey, counter metrics, and
// retry-after calculation.
// retry-after calculation. windowHour is stats-only (v0.2 data-layer
// task, see hourWindowTTL): checkAndCount/account both write it, but no
// LimitsConfig field ever names it, so evaluateScope has nothing to
// evaluate it against — GET /admin/api/usage/history (admin.go) is its
// only reader.
const (
windowHour = "hour"
windowMin = "min"
windowDay = "day"
windowMonth = "month"
)
// Counter metric names embedded in windowKey.
// Counter metric names embedded in windowKey. metricTokIn/metricTokOut
// replace a single combined "tok" metric (v0.2 data-layer task, folding
// the operator's tokens-in/tokens-out split directive): account records
// usage.prompt under metricTokIn and usage.completion under metricTokOut
// separately, so the admin usage/history APIs can chart each direction on
// its own. A TokensPerDay/TokensPerMonth limit still enforces a TOTAL
// budget across both — see tokenBudgetViolation.
const (
metricReq = "req"
metricTok = "tok"
metricCost = "cost"
metricReq = "req"
metricTokIn = "tokin"
metricTokOut = "tokout"
metricCost = "cost"
)
// TTLs applied to counter keys. They exceed their window's natural length
@@ -46,10 +58,18 @@ const (
// embedded in the key (see windowKey) already makes a rolled-over window
// use a different key, so these TTLs only bound how long a stale key
// lingers in memoryStore before an opportunistic sweep reclaims it.
// dayWindowTTL/monthWindowTTL were bumped from their original 25h/32d
// (v0.2 data-layer task): the admin usage-history API's day/month charts
// need a bucket to stay readable for the whole retention span a chart
// can request (historyMaxSpan, admin.go — 35 daily, 13 monthly buckets),
// not just long enough to survive its own single rollover. The TTL >
// window-length invariant this comment already documented still holds at
// the new values, and at hourWindowTTL for the new hour window.
const (
minWindowTTL = 2 * time.Minute
dayWindowTTL = 25 * time.Hour
monthWindowTTL = 32 * 24 * time.Hour
hourWindowTTL = 48 * time.Hour
dayWindowTTL = 35 * 24 * time.Hour
monthWindowTTL = 400 * 24 * time.Hour
)
// usdToMicroFactor scales a USD amount to micro-USD (1e6 micro-USD per
@@ -248,16 +268,31 @@ func (u usage) total() int64 {
return u.prompt + u.completion
}
// limitScope is one entity (a user or their group) whose limits apply to a
// request. checkAndCount and account evaluate every scope in the slice
// they are given, so a request is counted and checked against both its
// user's and its group's limits in one call.
// limitScope is one entity (a user, their group, or the synthetic total
// scope — see totalScopeKind) whose limits apply to a request.
// checkAndCount and account evaluate every scope in the slice they are
// given, so a request is counted and checked against both its user's and
// its group's limits in one call.
type limitScope struct {
limits *LimitsConfig
kind string // "user" or "group"
kind string // "user", "group", or "total"
id string
}
// totalScopeKind and totalScopeID name the synthetic "all LLM traffic"
// scope withTotalScope (routes_unified.go) appends to every metered
// route's scopes slice (v0.2 data-layer task): {kind: totalScopeKind, id:
// totalScopeID}, limits always nil. evaluateScope's nil-limits check
// (below) skips it during evaluation, so checkAndCount still counts it
// like any other scope — its req/tokin/tokout/cost counters accumulate
// every LLM request across all users and groups combined, the admin
// usage-history "total" series — but no configuration can ever throttle
// traffic in its name.
const (
totalScopeKind = "total"
totalScopeID = "all"
)
// limitViolation describes the first limit a request breached.
type limitViolation struct {
message string
@@ -479,36 +514,46 @@ func storeDownViolation() *limitViolation {
return &limitViolation{message: "limit store unavailable", storeDown: true}
}
// windowKey builds the counterStore key for one (kind, id, metric, window)
// counter at time t: llmgw:{kind}:{id}:{metric}:{window}:{bucket}. bucket
// is t.UTC() formatted to the window's granularity, so a counter's key
// changes automatically when its window rolls over.
func windowKey(kind, id, metric, window string, t time.Time) string {
// bucketFor formats t (in UTC) to window's bucket granularity: the string
// windowKey embeds as a key's final component, and the same string GET
// /admin/api/usage/history echoes as each point's "bucket" field
// (historyBucketKeys, below).
func bucketFor(t time.Time, window string) string {
u := t.UTC()
var bucket string
switch window {
case windowHour:
return u.Format("2006010215")
case windowMin:
bucket = u.Format("200601021504")
return u.Format("200601021504")
case windowDay:
bucket = u.Format("20060102")
return u.Format("20060102")
case windowMonth:
bucket = u.Format("200601")
return u.Format("200601")
default:
// window is always one of the three constants above, set by this
// window is always one of the four constants above, set by this
// file's own callers, never by request input — an unknown value
// here is a programming error. ServeHTTP's recoverPanic turns
// this into a logged 500 instead of crashing the process.
panic(fmt.Sprintf("llmgateway: windowKey: unknown window %q", window))
panic(fmt.Sprintf("llmgateway: bucketFor: unknown window %q", window))
}
return fmt.Sprintf("llmgw:%s:%s:%s:%s:%s", kind, id, metric, window, bucket)
}
// windowKey builds the counterStore key for one (kind, id, metric, window)
// counter at time t: llmgw:{kind}:{id}:{metric}:{window}:{bucket}. bucket
// is t.UTC() formatted to the window's granularity (bucketFor), so a
// counter's key changes automatically when its window rolls over.
func windowKey(kind, id, metric, window string, t time.Time) string {
return fmt.Sprintf("llmgw:%s:%s:%s:%s:%s", kind, id, metric, window, bucketFor(t, window))
}
// windowEnd returns the UTC instant at which window's bucket containing t
// ends: the next minute boundary, the next UTC midnight, or the first of
// next month UTC.
// ends: the next hour or minute boundary, the next UTC midnight, or the
// first of next month UTC.
func windowEnd(t time.Time, window string) time.Time {
u := t.UTC()
switch window {
case windowHour:
return time.Date(u.Year(), u.Month(), u.Day(), u.Hour(), 0, 0, 0, time.UTC).Add(time.Hour)
case windowMin:
return time.Date(u.Year(), u.Month(), u.Day(), u.Hour(), u.Minute(), 0, 0, time.UTC).Add(time.Minute)
case windowDay:
@@ -575,6 +620,14 @@ func (l *limiter) checkAndCount(scopes []limitScope) *limitViolation {
return storeDownViolation()
}
dayCounts[i] = v
// Hour is stats-only (windowHour's own doc comment): its value is
// never read back here, only written, so the admin usage-history
// API (admin.go) has an hour-granularity req series to read
// later.
if _, ok = l.incrCounter(sc.kind, sc.id, metricReq, windowHour, now, 1, hourWindowTTL); !ok {
return storeDownViolation()
}
}
for i, sc := range scopes {
@@ -607,10 +660,10 @@ func (l *limiter) evaluateScope(sc limitScope, minCount, dayCount int64, now tim
if v := requestLimitViolation(sc, "requests-per-day", lim.RequestsPerDay, dayCount, windowDay, now); v != nil {
return v
}
if v := l.budgetViolation(sc, metricTok, "tokens-per-day", lim.TokensPerDay, windowDay, now); v != nil {
if v := l.tokenBudgetViolation(sc, "tokens-per-day", lim.TokensPerDay, windowDay, now); v != nil {
return v
}
if v := l.budgetViolation(sc, metricTok, "tokens-per-month", lim.TokensPerMonth, windowMonth, now); v != nil {
if v := l.tokenBudgetViolation(sc, "tokens-per-month", lim.TokensPerMonth, windowMonth, now); v != nil {
return v
}
if v := l.budgetViolation(sc, metricCost, "cost-per-day", usdToMicros(lim.CostPerDayUSD), windowDay, now); v != nil {
@@ -657,84 +710,145 @@ func (l *limiter) budgetViolation(sc limitScope, metric, name string, limit int6
}
}
// account records u's total tokens and costMicros against every scope's
// day and month counters. A zero-valued metric is skipped entirely — no
// store write for a metric this call has nothing to report. A sample that
// tokenBudgetViolation mirrors budgetViolation for a token limit, which —
// unlike a request or cost limit — enforces a TOTAL budget over two split
// counters (metricTokIn, metricTokOut; v0.2 data-layer task): it reads
// both of the scope's accumulated tok-in/tok-out counters for window in
// ONE storeGetMulti round trip and compares their sum against limit.
// limit<=0 means unlimited. A fail-closed read returns
// storeDownViolation, matching budgetViolation's own contract; name is
// still e.g. "tokens-per-day", so the violation message still says
// "tokens" regardless of which direction pushed the total over.
func (l *limiter) tokenBudgetViolation(sc limitScope, name string, limit int64, window string, now time.Time) *limitViolation {
if limit <= 0 {
return nil
}
keys := []string{
windowKey(sc.kind, sc.id, metricTokIn, window, now),
windowKey(sc.kind, sc.id, metricTokOut, window, now),
}
vals, ok := l.storeGetMulti(keys)
if !ok || len(vals) != 2 {
return storeDownViolation()
}
used := vals[0] + vals[1]
if used < limit {
return nil
}
return &limitViolation{
message: fmt.Sprintf("%s %q exceeded %s budget", sc.kind, sc.id, name),
retryAfter: retryAfterSeconds(now, window),
}
}
// account records u's prompt/completion tokens — split into metricTokIn/
// metricTokOut (v0.2 data-layer task) — and costMicros against every
// scope's hour, day, and month counters. Each metric/direction is skipped
// independently when its own value is 0 — no store write for a direction
// this call has nothing to report, so a streaming response cut off before
// any completion tokens arrived still writes tokin alone. A sample that
// hits a fail-closed store error (see storeIncrBy) is dropped silently:
// account has no error return to signal it, and dropping — rather than
// counting it in the fallback — avoids double-counting once the store
// recovers.
func (l *limiter) account(scopes []limitScope, u usage, costMicros int64) {
now := l.now()
total := u.total()
for _, sc := range scopes {
if total != 0 {
l.incrCounter(sc.kind, sc.id, metricTok, windowDay, now, total, dayWindowTTL)
l.incrCounter(sc.kind, sc.id, metricTok, windowMonth, now, total, monthWindowTTL)
if u.prompt != 0 {
l.incrCounter(sc.kind, sc.id, metricTokIn, windowHour, now, u.prompt, hourWindowTTL)
l.incrCounter(sc.kind, sc.id, metricTokIn, windowDay, now, u.prompt, dayWindowTTL)
l.incrCounter(sc.kind, sc.id, metricTokIn, windowMonth, now, u.prompt, monthWindowTTL)
}
if u.completion != 0 {
l.incrCounter(sc.kind, sc.id, metricTokOut, windowHour, now, u.completion, hourWindowTTL)
l.incrCounter(sc.kind, sc.id, metricTokOut, windowDay, now, u.completion, dayWindowTTL)
l.incrCounter(sc.kind, sc.id, metricTokOut, windowMonth, now, u.completion, monthWindowTTL)
}
if costMicros != 0 {
l.incrCounter(sc.kind, sc.id, metricCost, windowHour, now, costMicros, hourWindowTTL)
l.incrCounter(sc.kind, sc.id, metricCost, windowDay, now, costMicros, dayWindowTTL)
l.incrCounter(sc.kind, sc.id, metricCost, windowMonth, now, costMicros, monthWindowTTL)
}
}
}
// scopeUsage is one scope's (a user's or a group's) current-window
// counter values — the admin dashboard's usage table (spec §4, v0.2). The
// six value fields mirror LimitsConfig's six limit kinds exactly, so the
// admin API can echo a usage value beside its matching limit.
// usageKeysPerScope is the number of windowKey strings usageWindowKeys
// builds per scope, and the stride currentUsage's flat storeGetMulti
// result is sliced back into per-scope chunks by. Named here, closing a
// v0.2 final review wave follow-up (2026-08-20) that flagged the previous
// literal "6" as a magic-number stride: this task grows the per-scope key
// count from 6 to 8 for the tokens-in/tokens-out split, which is exactly
// the moment a silent off-by-N here would have gone unnoticed.
const usageKeysPerScope = 8
// scopeUsage is one scope's (a user's, a group's, or the synthetic total
// scope's — totalScopeKind) current-window counter values — the admin
// dashboard's usage table (spec §4, v0.2) and GET /admin/api/usage's
// total row (v0.2 data-layer task). tokensInPerDay/tokensOutPerDay and
// their per-month counterparts replace a single combined
// tokensPerDay/tokensPerMonth pair (v0.2 data-layer task, tokens-in/
// tokens-out split): a caller wanting the combined total a
// LimitsConfig.TokensPerDay/TokensPerMonth limit is actually evaluated
// against (tokenBudgetViolation) sums the two itself.
type scopeUsage struct {
kind string // "user" or "group", mirroring limitScope.kind
kind string // "user", "group", or "total", mirroring limitScope.kind
id string
requestsPerMinute int64
requestsPerDay int64
tokensPerDay int64
tokensPerMonth int64
tokensInPerDay int64
tokensInPerMonth int64
tokensOutPerDay int64
tokensOutPerMonth int64
costPerDayMicros int64
costPerMonthMicros int64
// storeDown reports whether reading any of the six counters above
// failed closed (a configured store errored and failOpen is false) —
// mirrors limitViolation.storeDown. Every value field is 0 in that
// case; a caller must not present them as "confirmed zero usage".
// storeDown reports whether reading any of the usageKeysPerScope
// counters above failed closed (a configured store errored and
// failOpen is false) — mirrors limitViolation.storeDown. Every value
// field is 0 in that case; a caller must not present them as
// "confirmed zero usage".
storeDown bool
}
// usageWindowKeys returns the six windowKey strings currentUsage reads
// for sc at time now, in a fixed order — req/min, req/day, tok/day,
// tok/month, cost/day, cost/month — matching scopeUsage's field order
// exactly, so currentUsage can map storeGetMulti's result slice back to
// named fields by plain index.
// usageWindowKeys returns the usageKeysPerScope windowKey strings
// currentUsage reads for sc at time now, in a fixed order — req/min,
// req/day, tokin/day, tokin/month, tokout/day, tokout/month, cost/day,
// cost/month — matching scopeUsage's field order exactly, so currentUsage
// can map storeGetMulti's result slice back to named fields by plain
// index.
func usageWindowKeys(sc limitScope, now time.Time) []string {
return []string{
windowKey(sc.kind, sc.id, metricReq, windowMin, now),
windowKey(sc.kind, sc.id, metricReq, windowDay, now),
windowKey(sc.kind, sc.id, metricTok, windowDay, now),
windowKey(sc.kind, sc.id, metricTok, windowMonth, now),
windowKey(sc.kind, sc.id, metricTokIn, windowDay, now),
windowKey(sc.kind, sc.id, metricTokIn, windowMonth, now),
windowKey(sc.kind, sc.id, metricTokOut, windowDay, now),
windowKey(sc.kind, sc.id, metricTokOut, windowMonth, now),
windowKey(sc.kind, sc.id, metricCost, windowDay, now),
windowKey(sc.kind, sc.id, metricCost, windowMonth, now),
}
}
// currentUsage reads every scope's six current-window counters — the
// same (kind, id, metric, window) combinations checkAndCount/account
// already write — via the limiter's own storeGetMulti, so it applies the
// identical fail-open/fail-closed policy every enforcement read already
// does, and it is read-only: unlike checkAndCount, it never increments
// anything.
// currentUsage reads every scope's usageKeysPerScope current-window
// counters — the same (kind, id, metric, window) combinations
// checkAndCount/account already write — via the limiter's own
// storeGetMulti, so it applies the identical fail-open/fail-closed policy
// every enforcement read already does, and it is read-only: unlike
// checkAndCount, it never increments anything.
//
// ONE storeGetMulti call for the whole scopes slice (v0.2 final review
// wave, 2026-08-20; supersedes the "one call per scope" amendment this
// comment previously described, 2026-08-20 review): every scope's six
// keys are flattened into a single round trip against the shared store,
// comment previously described, 2026-08-20 review): every scope's keys
// are flattened into a single round trip against the shared store,
// rather than N separate ones. The reviewer-confirmed reason for this
// second amendment: GET /admin/api/usage's per-scope loop was contending
// with request admission on the same store connection as live traffic,
// and N round trips (even pipelined 6-at-a-time) scales with the number
// of configured users and groups in a way one round trip does not.
// buildAdminUsage (admin.go) drives this by concatenating its users and
// groups into one scopes slice before calling in, then slicing the flat
// result back into its two response sections at the same split point.
// and N round trips (even pipelined usageKeysPerScope-at-a-time) scales
// with the number of configured users and groups in a way one round trip
// does not. buildAdminUsage (admin.go) drives this by concatenating its
// users, groups, and the total scope into one scopes slice before calling
// in, then slicing the flat result back into its response sections at the
// same split points.
//
// Tradeoff given up by this second amendment: a transient store error
// now marks every scope in the call storeDown together, where the
@@ -751,7 +865,7 @@ func (l *limiter) currentUsage(scopes []limitScope) []scopeUsage {
}
now := l.now()
allKeys := make([]string, 0, len(scopes)*6)
allKeys := make([]string, 0, len(scopes)*usageKeysPerScope)
for _, sc := range scopes {
allKeys = append(allKeys, usageWindowKeys(sc, now)...)
}
@@ -771,13 +885,86 @@ func (l *limiter) currentUsage(scopes []limitScope) []scopeUsage {
}
for i, sc := range scopes {
v := vals[i*6 : i*6+6]
v := vals[i*usageKeysPerScope : i*usageKeysPerScope+usageKeysPerScope]
out[i] = scopeUsage{
kind: sc.kind, id: sc.id,
requestsPerMinute: v[0], requestsPerDay: v[1],
tokensPerDay: v[2], tokensPerMonth: v[3],
costPerDayMicros: v[4], costPerMonthMicros: v[5],
tokensInPerDay: v[2], tokensInPerMonth: v[3],
tokensOutPerDay: v[4], tokensOutPerMonth: v[5],
costPerDayMicros: v[6], costPerMonthMicros: v[7],
}
}
return out
}
// historyPoint is one bucket's counter value in a limiter.history result:
// bucket is the same string bucketFor produces for that instant (e.g.
// "2026082114" for an hour bucket), value is the counter's reading — 0
// for a bucket that was never written, matching get/getMulti's existing
// "0 for a missing key" contract.
type historyPoint struct {
bucket string
value int64
}
// historyStepBack returns the instant window's bucket was current i steps
// before now: i=0 is now's own (current, possibly partial) bucket, i=1
// the previous one, and so on. hour and day step by a fixed duration/day
// count from now itself; month anchors on the 1st of now's own month
// first, then steps whole calendar months from there —
// time.Time.AddDate normalizes an overflowing day-of-month (e.g. "Mar 31"
// minus one month becomes "Mar 3", not "Feb 28/29"), so stepping from day
// 1 (which exists in every month) is the only way whole-month arithmetic
// stays exact regardless of what day of the month now is.
func historyStepBack(now time.Time, window string, i int) time.Time {
u := now.UTC()
switch window {
case windowHour:
return u.Add(-time.Duration(i) * time.Hour)
case windowDay:
return u.AddDate(0, 0, -i)
case windowMonth:
anchor := time.Date(u.Year(), u.Month(), 1, 0, 0, 0, 0, time.UTC)
return anchor.AddDate(0, -i, 0)
default:
panic(fmt.Sprintf("llmgateway: historyStepBack: unknown window %q", window))
}
}
// historyBucketKeys returns the span counterStore keys and their matching
// bucket label strings for (kind, id, metric, window), stepping back from
// now one whole window unit at a time — oldest first, the current
// (possibly partial) bucket last, matching GET /admin/api/usage/history's
// "inclusive of current bucket, oldest-first" contract.
func historyBucketKeys(kind, id, metric, window string, now time.Time, span int) (keys, buckets []string) {
keys = make([]string, span)
buckets = make([]string, span)
for i := 0; i < span; i++ {
t := historyStepBack(now, window, span-1-i)
keys[i] = windowKey(kind, id, metric, window, t)
buckets[i] = bucketFor(t, window)
}
return keys, buckets
}
// history returns span counter values for (kind, id, metric, window)
// ending at now, oldest-first — GET /admin/api/usage/history's data
// source (v0.2 data-layer task). It computes every bucket key up front
// and reads them in ONE storeGetMulti round trip, the same single-batch
// discipline currentUsage already applies to a scope's current-window
// keys, scaled here to a whole span of one metric/window instead of a
// fixed set of usageKeysPerScope. ok is false only in the fail-closed
// case (storeGetMulti's own contract): a caller must not present the
// returned points as real data then.
func (l *limiter) history(kind, id, metric, window string, now time.Time, span int) ([]historyPoint, bool) {
keys, buckets := historyBucketKeys(kind, id, metric, window, now, span)
vals, ok := l.storeGetMulti(keys)
if !ok || len(vals) != len(keys) {
return nil, false
}
points := make([]historyPoint, span)
for i := range points {
points[i] = historyPoint{bucket: buckets[i], value: vals[i]}
}
return points, true
}
+336 -10
View File
@@ -168,13 +168,15 @@ func TestLimiterRequestLimitRetryAfter(t *testing.T) {
// TestWindowKeyFormat pins the exact key layout every store operation
// depends on: llmgw:{kind}:{id}:{metric}:{window}:{bucket}, with bucket
// formatted from t.UTC() at each window's granularity.
// formatted from t.UTC() at each window's granularity — including hour
// (v0.2 data-layer task).
func TestWindowKeyFormat(t *testing.T) {
tm := time.Date(2026, 8, 20, 10, 4, 59, 0, time.FixedZone("UTC+1", 3600)) // 09:04:59 UTC
cases := []struct {
window string
want string
}{
{windowHour, "llmgw:user:a:req:hour:2026082009"},
{windowMin, "llmgw:user:a:req:min:202608200904"},
{windowDay, "llmgw:user:a:req:day:20260820"},
{windowMonth, "llmgw:user:a:req:month:202608"},
@@ -186,6 +188,270 @@ func TestWindowKeyFormat(t *testing.T) {
}
}
// TestWindowKeyFormat_HourUTCBoundary pins the hour bucket rolling over
// exactly at the UTC hour boundary, and proves a non-UTC input is
// converted to UTC first (an input at 00:04:59 in a UTC+1 zone is 23:04:59
// UTC the PREVIOUS day — a bug converting the hour field alone without
// re-deriving the date would produce "...23" glued onto the wrong day).
func TestWindowKeyFormat_HourUTCBoundary(t *testing.T) {
justBefore := time.Date(2026, 8, 20, 8, 59, 59, 0, time.UTC)
justAfter := time.Date(2026, 8, 20, 9, 0, 0, 0, time.UTC)
if got := windowKey("user", "a", "req", windowHour, justBefore); got != "llmgw:user:a:req:hour:2026082008" {
t.Errorf("just before the hour boundary: got %q", got)
}
if got := windowKey("user", "a", "req", windowHour, justAfter); got != "llmgw:user:a:req:hour:2026082009" {
t.Errorf("just after the hour boundary: got %q", got)
}
// 00:04:59 in UTC+1 is 23:04:59 UTC the previous day.
crossMidnight := time.Date(2026, 8, 21, 0, 4, 59, 0, time.FixedZone("UTC+1", 3600))
if got := windowKey("user", "a", "req", windowHour, crossMidnight); got != "llmgw:user:a:req:hour:2026082023" {
t.Errorf("cross-midnight non-UTC input: got %q, want the previous UTC day's hour 23 bucket", got)
}
}
// TestWindowEnd_HourBoundary asserts windowEnd's new hour case (v0.2
// data-layer task) returns the next UTC hour boundary, and that a value
// exactly on the boundary reports zero seconds remaining in that boundary
// (retryAfterSeconds rounds a zero duration up to 0, distinct from
// rounding a fractional second up to 1 — see TestLimiterRetryAfter for
// the day/month/min cases this mirrors).
func TestWindowEnd_HourBoundary(t *testing.T) {
t.Run("mid-hour", func(t *testing.T) {
got := windowEnd(time.Date(2026, 8, 20, 9, 30, 0, 0, time.UTC), windowHour)
want := time.Date(2026, 8, 20, 10, 0, 0, 0, time.UTC)
if !got.Equal(want) {
t.Errorf("windowEnd = %v, want %v", got, want)
}
})
t.Run("exactly on the boundary", func(t *testing.T) {
got := windowEnd(time.Date(2026, 8, 20, 10, 0, 0, 0, time.UTC), windowHour)
want := time.Date(2026, 8, 20, 11, 0, 0, 0, time.UTC)
if !got.Equal(want) {
t.Errorf("windowEnd = %v, want %v", got, want)
}
})
}
// TestHistoryStepBack_HourAndDay asserts the fixed-duration step-back
// cases (hour, day) land i units before now exactly, including across a
// UTC day boundary.
func TestHistoryStepBack_HourAndDay(t *testing.T) {
now := time.Date(2026, 8, 20, 1, 30, 0, 0, time.UTC)
if got := historyStepBack(now, windowHour, 0); !got.Equal(now) {
t.Errorf("i=0 must be now itself, got %v", got)
}
wantHour := time.Date(2026, 8, 19, 23, 30, 0, 0, time.UTC) // 2 hours back, crossing midnight
if got := historyStepBack(now, windowHour, 2); !got.Equal(wantHour) {
t.Errorf("i=2 hours back = %v, want %v", got, wantHour)
}
wantDay := time.Date(2026, 8, 17, 1, 30, 0, 0, time.UTC)
if got := historyStepBack(now, windowDay, 3); !got.Equal(wantDay) {
t.Errorf("i=3 days back = %v, want %v", got, wantDay)
}
}
// TestHistoryStepBack_MonthAnchorsOnDayOne is the month-arithmetic trap
// TestLimiterRetryAfter's own month case does not exercise: stepping back
// from a high day-of-month (the 31st) with a naive
// now.AddDate(0, -i, 0) overflows a shorter target month (e.g. "Mar 31"
// minus one month normalizes to "Mar 3", not "Feb 28") and would land in
// the WRONG calendar month's bucket. historyStepBack avoids this by
// anchoring on day 1 first — this test drives it from Mar 31 and Jan 31
// specifically because those are the inputs that would expose a
// regression back to the naive form.
func TestHistoryStepBack_MonthAnchorsOnDayOne(t *testing.T) {
cases := []struct {
now time.Time
name string
want string
i int
}{
{name: "Mar 31 minus 1 month = Feb", now: time.Date(2026, 3, 31, 12, 0, 0, 0, time.UTC), i: 1, want: "202602"},
{name: "Jan 31 minus 1 month = Dec (year rollover)", now: time.Date(2026, 1, 31, 0, 0, 0, 0, time.UTC), i: 1, want: "202512"},
{name: "May 31 minus 3 months = Feb", now: time.Date(2026, 5, 31, 0, 0, 0, 0, time.UTC), i: 3, want: "202602"},
{name: "i=0 is now's own month", now: time.Date(2026, 3, 31, 0, 0, 0, 0, time.UTC), i: 0, want: "202603"},
}
for _, c := range cases {
t.Run(c.name, func(t *testing.T) {
got := bucketFor(historyStepBack(c.now, windowMonth, c.i), windowMonth)
if got != c.want {
t.Errorf("bucketFor(historyStepBack(%v, month, %d)) = %q, want %q", c.now, c.i, got, c.want)
}
})
}
}
// TestHistoryBucketKeys_OldestFirstInclusiveOfCurrent asserts
// historyBucketKeys returns span buckets oldest-first, with the LAST
// entry being now's own (current, possibly partial) bucket — the
// "inclusive of current bucket" contract GET /admin/api/usage/history
// promises.
func TestHistoryBucketKeys_OldestFirstInclusiveOfCurrent(t *testing.T) {
now := time.Date(2026, 8, 20, 14, 0, 0, 0, time.UTC)
keys, buckets := historyBucketKeys("total", "all", "req", windowHour, now, 4)
wantBuckets := []string{"2026082011", "2026082012", "2026082013", "2026082014"}
if len(buckets) != len(wantBuckets) {
t.Fatalf("len(buckets) = %d, want %d", len(buckets), len(wantBuckets))
}
for i, want := range wantBuckets {
if buckets[i] != want {
t.Errorf("buckets[%d] = %q, want %q", i, buckets[i], want)
}
wantKey := "llmgw:total:all:req:hour:" + want
if keys[i] != wantKey {
t.Errorf("keys[%d] = %q, want %q", i, keys[i], wantKey)
}
}
}
// TestLimiterHistory_OneBatchCallOldestFirst drives limiter.history
// against a counting stub store: it must issue exactly ONE getMulti call
// for the whole span, and the returned points must be oldest-first with
// the seeded values in the right buckets.
func TestLimiterHistory_OneBatchCallOldestFirst(t *testing.T) {
now := time.Date(2026, 8, 20, 10, 0, 0, 0, time.UTC)
countStore := &historyCountingStore{values: map[string]int64{
windowKey("total", "all", metricReq, windowHour, now.Add(-2*time.Hour)): 5,
windowKey("total", "all", metricReq, windowHour, now): 9,
}}
l := newLimiter(countStore, true)
l.nowFn = func() time.Time { return now }
points, ok := l.history("total", "all", "req", windowHour, now, 3)
if !ok {
t.Fatal("want ok=true")
}
if countStore.getMultiCalls != 1 {
t.Errorf("getMultiCalls = %d, want 1", countStore.getMultiCalls)
}
if len(points) != 3 {
t.Fatalf("len(points) = %d, want 3", len(points))
}
if points[0].value != 5 || points[0].bucket != bucketFor(now.Add(-2*time.Hour), windowHour) {
t.Errorf("points[0] (oldest) = %+v, want value 5 at the -2h bucket", points[0])
}
if points[1].value != 0 {
t.Errorf("points[1] (unseeded -1h bucket) = %+v, want value 0", points[1])
}
if points[2].value != 9 || points[2].bucket != bucketFor(now, windowHour) {
t.Errorf("points[2] (newest, current bucket) = %+v, want value 9", points[2])
}
}
// historyCountingStore is a counterStore stub whose getMulti serves fixed
// values and counts its own calls — mirrors admin_test.go's
// countingMultiStore, defined separately here since limits_test.go must
// not depend on admin_test.go's test-only types.
type historyCountingStore struct {
values map[string]int64
getMultiCalls int
}
func (s *historyCountingStore) incrBy(string, int64, time.Duration) (int64, error) { return 0, nil }
func (s *historyCountingStore) get(string) (int64, error) { return 0, nil }
func (s *historyCountingStore) getMulti(keys []string) ([]int64, error) {
s.getMultiCalls++
out := make([]int64, len(keys))
for i, k := range keys {
out[i] = s.values[k]
}
return out, nil
}
// TestLimiterHistory_StoreDown asserts limiter.history reports ok=false
// when the configured store errors and failOpen is false — the caller
// (GET /admin/api/usage/history) must answer 503, never a silently-zero
// series.
func TestLimiterHistory_StoreDown(t *testing.T) {
l := newLimiter(alwaysErrStore{}, false)
points, ok := l.history("total", "all", "req", windowDay, time.Now(), 5)
if ok {
t.Fatal("want ok=false when the configured store errors and failOpen is false")
}
if points != nil {
t.Errorf("points = %+v, want nil on a storeDown read", points)
}
}
// TestWithTotalScope_AppendsUnlimitedTotalScope asserts withTotalScope
// appends exactly one {kind: totalScopeKind, id: totalScopeID, limits:
// nil} scope after whatever buildLimitScopes already returned.
func TestWithTotalScope_AppendsUnlimitedTotalScope(t *testing.T) {
base := []limitScope{{kind: "user", id: "u", limits: &LimitsConfig{RequestsPerMinute: 1}}}
got := withTotalScope(base)
if len(got) != 2 {
t.Fatalf("len(got) = %d, want 2", len(got))
}
if got[0].kind != "user" || got[0].id != "u" {
t.Errorf("got[0] = %+v, want the original user scope untouched", got[0])
}
total := got[1]
if total.kind != totalScopeKind || total.id != totalScopeID || total.limits != nil {
t.Errorf("got[1] = %+v, want kind=%q id=%q limits=nil", total, totalScopeKind, totalScopeID)
}
}
// TestWithTotalScope_CountedButNeverEvaluated drives checkAndCount many
// times against a scopes slice built via withTotalScope: the total
// scope's own limits are always nil, so no volume of traffic can ever
// make it violate — evaluateScope's nil-limits check skips it — while its
// req counter still climbs by exactly one per call, proving
// checkAndCount's counting loop does not skip a nil-limits scope the way
// evaluation does.
func TestWithTotalScope_CountedButNeverEvaluated(t *testing.T) {
l := newLimiter(nil, true)
now := time.Date(2026, 8, 20, 12, 0, 0, 0, time.UTC)
l.nowFn = func() time.Time { return now }
scopes := withTotalScope([]limitScope{{kind: "user", id: "u", limits: nil}})
const n = 250
for i := 0; i < n; i++ {
if v := l.checkAndCount(scopes); v != nil {
t.Fatalf("iteration %d: total scope must never violate (limits always nil), got %+v", i, v)
}
}
total, ok := l.getCounter(totalScopeKind, totalScopeID, metricReq, windowDay, now)
if !ok || total != n {
t.Errorf("total req:day = %d, ok=%v, want %d (counted every call despite never evaluating)", total, ok, n)
}
totalHour, ok := l.getCounter(totalScopeKind, totalScopeID, metricReq, windowHour, now)
if !ok || totalHour != n {
t.Errorf("total req:hour = %d, ok=%v, want %d", totalHour, ok, n)
}
}
// TestWithTotalScope_AccountWritesHourBuckets asserts account (v0.2
// data-layer task) writes the total scope's hour-window tokin/tokout/cost
// counters, not just day/month — checkAndCount's own hour write is
// covered by TestWithTotalScope_CountedButNeverEvaluated above.
func TestWithTotalScope_AccountWritesHourBuckets(t *testing.T) {
l := newLimiter(nil, true)
now := time.Date(2026, 8, 20, 12, 0, 0, 0, time.UTC)
l.nowFn = func() time.Time { return now }
scopes := withTotalScope([]limitScope{{kind: "user", id: "u", limits: nil}})
l.account(scopes, usage{prompt: 4, completion: 6}, 700)
tokIn, ok := l.getCounter(totalScopeKind, totalScopeID, metricTokIn, windowHour, now)
if !ok || tokIn != 4 {
t.Errorf("total tokin:hour = %d, ok=%v, want 4", tokIn, ok)
}
tokOut, ok := l.getCounter(totalScopeKind, totalScopeID, metricTokOut, windowHour, now)
if !ok || tokOut != 6 {
t.Errorf("total tokout:hour = %d, ok=%v, want 6", tokOut, ok)
}
cost, ok := l.getCounter(totalScopeKind, totalScopeID, metricCost, windowHour, now)
if !ok || cost != 700 {
t.Errorf("total cost:hour = %d, ok=%v, want 700", cost, ok)
}
}
// TestMemoryStoreIncrAndGet exercises the fallback store directly: fresh
// keys start at n, repeated incrBy accumulates, and get on an unknown key
// returns 0 with no error.
@@ -303,9 +569,10 @@ func TestLimiterCostBudgetRoundsUSDConversion(t *testing.T) {
}
}
// TestAccountSkipsZeroMetrics asserts account writes no tokens counter
// when usage totals 0, and no cost counter when costMicros is 0 — each
// metric's absence is independently observable via get.
// TestAccountSkipsZeroMetrics asserts account writes no tokin/tokout
// counter when the matching usage direction is 0, and no cost counter
// when costMicros is 0 — each metric's absence is independently
// observable via get.
func TestAccountSkipsZeroMetrics(t *testing.T) {
now := time.Date(2026, 8, 20, 10, 0, 0, 0, time.UTC)
l := newLimiter(nil, true)
@@ -314,9 +581,13 @@ func TestAccountSkipsZeroMetrics(t *testing.T) {
l.account(scopes, usage{}, 0)
tok, ok := l.getCounter("user", "z", metricTok, windowDay, now)
if !ok || tok != 0 {
t.Errorf("tok counter = %d, ok=%v, want 0, true", tok, ok)
tokIn, ok := l.getCounter("user", "z", metricTokIn, windowDay, now)
if !ok || tokIn != 0 {
t.Errorf("tokin counter = %d, ok=%v, want 0, true", tokIn, ok)
}
tokOut, ok := l.getCounter("user", "z", metricTokOut, windowDay, now)
if !ok || tokOut != 0 {
t.Errorf("tokout counter = %d, ok=%v, want 0, true", tokOut, ok)
}
cost, ok := l.getCounter("user", "z", metricCost, windowDay, now)
if !ok || cost != 0 {
@@ -324,6 +595,54 @@ func TestAccountSkipsZeroMetrics(t *testing.T) {
}
}
// TestAccountSplitsTokensIndependently asserts account writes prompt
// tokens to metricTokIn and completion tokens to metricTokOut
// independently — including the asymmetric case (prompt only, no
// completion yet) the estimation fallback and a dropped stream both rely
// on: a nonzero prompt with a zero completion must still write tokin
// alone, never skip it because completion is 0.
func TestAccountSplitsTokensIndependently(t *testing.T) {
now := time.Date(2026, 8, 20, 10, 0, 0, 0, time.UTC)
l := newLimiter(nil, true)
l.nowFn = func() time.Time { return now }
scopes := []limitScope{{kind: "user", id: "split", limits: nil}}
l.account(scopes, usage{prompt: 25}, 0) // completion left at zero
tokIn, ok := l.getCounter("user", "split", metricTokIn, windowDay, now)
if !ok || tokIn != 25 {
t.Errorf("tokin counter = %d, ok=%v, want 25, true", tokIn, ok)
}
tokOut, ok := l.getCounter("user", "split", metricTokOut, windowDay, now)
if !ok || tokOut != 0 {
t.Errorf("tokout counter = %d, ok=%v, want 0, true (no completion tokens reported)", tokOut, ok)
}
l.account(scopes, usage{completion: 9}, 0) // prompt left at zero this time
tokIn, ok = l.getCounter("user", "split", metricTokIn, windowDay, now)
if !ok || tokIn != 25 {
t.Errorf("tokin counter = %d, ok=%v, want still 25 (this call reported no prompt tokens)", tokIn, ok)
}
tokOut, ok = l.getCounter("user", "split", metricTokOut, windowDay, now)
if !ok || tokOut != 9 {
t.Errorf("tokout counter = %d, ok=%v, want 9", tokOut, ok)
}
}
// TestTokenBudgetSumsInAndOut asserts a TokensPerDay/TokensPerMonth limit
// enforces a TOTAL budget across metricTokIn and metricTokOut combined —
// the operator directive's "limits stay total-token (limiter sums both at
// read)": neither direction alone crosses the budget, but their sum does.
func TestTokenBudgetSumsInAndOut(t *testing.T) {
l := newLimiter(nil, true)
scopes := []limitScope{{kind: "group", id: "g", limits: &LimitsConfig{TokensPerDay: 100}}}
l.account(scopes, usage{prompt: 60, completion: 45}, 0) // 105 > 100, split 60/45
if v := l.checkAndCount(scopes); v == nil {
t.Fatal("60 tokin + 45 tokout = 105 > 100 must refuse, even though neither direction alone exceeds 100")
}
}
// TestLimiterRequestPerDayLimit is carried-item (b): a per-day request
// limit blocks once the day's count exceeds it, independent of the
// (unset, unlimited) per-minute limit.
@@ -491,12 +810,19 @@ func TestLimiter_FailClosed_AccountDropsSampleOnStoreError(t *testing.T) {
l.account(scopes, usage{prompt: 10, completion: 10}, 500)
got, err := l.fallback.get(windowKey("user", "u", metricTok, windowDay, l.now()))
gotIn, err := l.fallback.get(windowKey("user", "u", metricTokIn, windowDay, l.now()))
if err != nil {
t.Fatalf("fallback.get: %v", err)
}
if got != 0 {
t.Errorf("fallback tok:day counter = %d, want 0 (sample must be dropped, not counted locally)", got)
if gotIn != 0 {
t.Errorf("fallback tokin:day counter = %d, want 0 (sample must be dropped, not counted locally)", gotIn)
}
gotOut, err := l.fallback.get(windowKey("user", "u", metricTokOut, windowDay, l.now()))
if err != nil {
t.Fatalf("fallback.get: %v", err)
}
if gotOut != 0 {
t.Errorf("fallback tokout:day counter = %d, want 0 (sample must be dropped, not counted locally)", gotOut)
}
}
+1 -1
View File
@@ -166,7 +166,7 @@ func (g *Gateway) handleTargetProxy(w http.ResponseWriter, r *http.Request, u *u
return
}
scopes := buildLimitScopes(u, grp)
scopes := withTotalScope(buildLimitScopes(u, grp))
if violation := g.limiter.checkAndCount(scopes); violation != nil {
writeLimitViolation(w, violation)
return
+15 -3
View File
@@ -660,9 +660,13 @@ func TestHandleTargetProxy_JSONResponse_OnlyRequestCounterMoves(t *testing.T) {
t.Errorf("body = %q, want verbatim upstream body", rec.Body.String())
}
tok, ok := gw.limiter.getCounter("user", "alice", metricTok, windowDay, time.Now())
if !ok || tok != 0 {
t.Errorf("user token/day counter = %d (ok=%v), want 0 — target proxy must never account response usage", tok, ok)
tokIn, ok := gw.limiter.getCounter("user", "alice", metricTokIn, windowDay, time.Now())
if !ok || tokIn != 0 {
t.Errorf("user tokin/day counter = %d (ok=%v), want 0 — target proxy must never account response usage", tokIn, ok)
}
tokOut, ok := gw.limiter.getCounter("user", "alice", metricTokOut, windowDay, time.Now())
if !ok || tokOut != 0 {
t.Errorf("user tokout/day counter = %d (ok=%v), want 0 — target proxy must never account response usage", tokOut, ok)
}
cost, ok := gw.limiter.getCounter("user", "alice", metricCost, windowDay, time.Now())
if !ok || cost != 0 {
@@ -672,6 +676,14 @@ func TestHandleTargetProxy_JSONResponse_OnlyRequestCounterMoves(t *testing.T) {
if !ok || reqCount != 1 {
t.Errorf("user request/min counter = %d (ok=%v), want 1 — the request itself is still accounted", reqCount, ok)
}
// withTotalScope (handleTargetProxy, mcp_a2a.go) must have appended
// the synthetic total scope too (v0.2 data-layer task): counted like
// any other scope, still never token/cost-accounted here.
totalReq, ok := gw.limiter.getCounter(totalScopeKind, totalScopeID, metricReq, windowMin, time.Now())
if !ok || totalReq != 1 {
t.Errorf("total request/min counter = %d (ok=%v), want 1", totalReq, ok)
}
}
// --- config validation at construction ---
+1 -1
View File
@@ -69,7 +69,7 @@ func (g *Gateway) resolveMediaRequest(sw *statusTrackingWriter, u *user, grp *gr
writeModelResolveError(sw, err)
return nil, "", false
}
if violation := g.limiter.checkAndCount(buildLimitScopes(u, grp)); violation != nil {
if violation := g.limiter.checkAndCount(withTotalScope(buildLimitScopes(u, grp))); violation != nil {
writeLimitViolation(sw, violation)
return nil, "", false
}
+12 -2
View File
@@ -164,8 +164,18 @@ func TestHandleImagesGenerations_OpenAI_HappyPath_NativeForward(t *testing.T) {
if !ok || reqCount != 1 {
t.Errorf("user request/min counter = %d (ok=%v), want 1", reqCount, ok)
}
if tok, ok := gw.limiter.getCounter("user", "alice", metricTok, windowDay, time.Now()); ok && tok != 0 {
t.Errorf("user token/day counter = %d, want 0 (images are never token-accounted)", tok)
if tokIn, okIn := gw.limiter.getCounter("user", "alice", metricTokIn, windowDay, time.Now()); okIn && tokIn != 0 {
t.Errorf("user tokin/day counter = %d, want 0 (images are never token-accounted)", tokIn)
}
if tokOut, okOut := gw.limiter.getCounter("user", "alice", metricTokOut, windowDay, time.Now()); okOut && tokOut != 0 {
t.Errorf("user tokout/day counter = %d, want 0 (images are never token-accounted)", tokOut)
}
// withTotalScope (resolveMediaRequest, routes_media.go) must have
// appended the synthetic total scope too (v0.2 data-layer task).
totalReq, ok := gw.limiter.getCounter(totalScopeKind, totalScopeID, metricReq, windowMin, time.Now())
if !ok || totalReq != 1 {
t.Errorf("total request/min counter = %d (ok=%v), want 1", totalReq, ok)
}
}
+1 -1
View File
@@ -266,7 +266,7 @@ func (g *Gateway) handlePassthrough(w http.ResponseWriter, r *http.Request, u *u
return
}
scopes := buildLimitScopes(u, grp)
scopes := withTotalScope(buildLimitScopes(u, grp))
if violation := g.limiter.checkAndCount(scopes); violation != nil {
writeLimitViolation(w, violation)
return
+32 -9
View File
@@ -461,9 +461,24 @@ func TestHandlePassthrough_NonStreamJSON_AccountsUsage(t *testing.T) {
t.Errorf("body = %q, want verbatim upstream body %q", rec.Body.String(), respBody)
}
tok, ok := gw.limiter.getCounter("user", "alice", metricTok, windowDay, time.Now())
if !ok || tok != 10 {
t.Errorf("user token/day counter = %d (ok=%v), want 10", tok, ok)
tokIn, ok := gw.limiter.getCounter("user", "alice", metricTokIn, windowDay, time.Now())
if !ok || tokIn != 7 {
t.Errorf("user tokin/day counter = %d (ok=%v), want 7", tokIn, ok)
}
tokOut, ok := gw.limiter.getCounter("user", "alice", metricTokOut, windowDay, time.Now())
if !ok || tokOut != 3 {
t.Errorf("user tokout/day counter = %d (ok=%v), want 3", tokOut, ok)
}
// withTotalScope (handlePassthrough, routes_passthrough.go) must have
// appended the synthetic total scope too (v0.2 data-layer task).
totalTokIn, ok := gw.limiter.getCounter(totalScopeKind, totalScopeID, metricTokIn, windowDay, time.Now())
if !ok || totalTokIn != 7 {
t.Errorf("total tokin/day counter = %d (ok=%v), want 7", totalTokIn, ok)
}
totalTokOut, ok := gw.limiter.getCounter(totalScopeKind, totalScopeID, metricTokOut, windowDay, time.Now())
if !ok || totalTokOut != 3 {
t.Errorf("total tokout/day counter = %d (ok=%v), want 3", totalTokOut, ok)
}
}
@@ -623,9 +638,13 @@ func TestHandlePassthrough_AcceptEncodingStripped_AccountsUsageThroughGzip(t *te
t.Errorf("body = %q, want decompressed upstream body %q", rec.Body.String(), respBody)
}
tok, ok := gw.limiter.getCounter("user", "alice", metricTok, windowDay, time.Now())
if !ok || tok != 10 {
t.Errorf("user token/day counter = %d (ok=%v), want 10 — usage must still be accounted through gzip", tok, ok)
tokIn, ok := gw.limiter.getCounter("user", "alice", metricTokIn, windowDay, time.Now())
if !ok || tokIn != 7 {
t.Errorf("user tokin/day counter = %d (ok=%v), want 7 — usage must still be accounted through gzip", tokIn, ok)
}
tokOut, ok := gw.limiter.getCounter("user", "alice", metricTokOut, windowDay, time.Now())
if !ok || tokOut != 3 {
t.Errorf("user tokout/day counter = %d (ok=%v), want 3 — usage must still be accounted through gzip", tokOut, ok)
}
}
@@ -757,9 +776,13 @@ func TestHandlePassthrough_OversizedJSONBody_ClientGetsFullBody_RequestOnlyAccou
t.Errorf("client body = %d bytes, want the full %d bytes (client copy must never truncate)", rec.Body.Len(), len(respBody))
}
tok, ok := gw.limiter.getCounter("user", "alice", metricTok, windowDay, time.Now())
if !ok || tok != 0 {
t.Errorf("user token/day counter = %d (ok=%v), want 0 — usage accounting must be skipped over the tee cap", tok, ok)
tokIn, ok := gw.limiter.getCounter("user", "alice", metricTokIn, windowDay, time.Now())
if !ok || tokIn != 0 {
t.Errorf("user tokin/day counter = %d (ok=%v), want 0 — usage accounting must be skipped over the tee cap", tokIn, ok)
}
tokOut, ok := gw.limiter.getCounter("user", "alice", metricTokOut, windowDay, time.Now())
if !ok || tokOut != 0 {
t.Errorf("user tokout/day counter = %d (ok=%v), want 0 — usage accounting must be skipped over the tee cap", tokOut, ok)
}
reqCount, ok := gw.limiter.getCounter("user", "alice", metricReq, windowMin, time.Now())
if !ok || reqCount != 1 {
+21 -1
View File
@@ -113,7 +113,7 @@ func (g *Gateway) runUnified(w http.ResponseWriter, r *http.Request, u *user, gr
return
}
scopes := buildLimitScopes(u, grp)
scopes := withTotalScope(buildLimitScopes(u, grp))
if violation := g.limiter.checkAndCount(scopes); violation != nil {
writeLimitViolation(sw, violation)
return
@@ -225,6 +225,12 @@ func (g *Gateway) runUnified(w http.ResponseWriter, r *http.Request, u *user, gr
// apply to a given request. The user scope is listed first, so
// checkAndCount reports a user's own violation ahead of their group's when
// both are breached by the same request.
//
// Callers metering actual LLM traffic wrap this result in withTotalScope
// before passing it to checkAndCount/account; handleAdminAPI (admin.go)
// calls this directly, without withTotalScope, so an admin request's own
// req/min-req/day accounting never contributes to the total-scope
// LLM-traffic series (v0.2 data-layer task).
func buildLimitScopes(u *user, grp *group) []limitScope {
scopes := make([]limitScope, 0, 2)
if u.limits != nil {
@@ -236,6 +242,20 @@ func buildLimitScopes(u *user, grp *group) []limitScope {
return scopes
}
// withTotalScope returns scopes with the synthetic total scope
// (totalScopeKind/totalScopeID, limits.go) appended — the single helper
// every metered route (runUnified above; resolveMediaRequest,
// routes_media.go; handlePassthrough, routes_passthrough.go;
// handleTargetProxy, mcp_a2a.go) calls around its own buildLimitScopes
// result, so none of them can forget it and none of them duplicate the
// scope literal. Deliberately not folded into buildLimitScopes itself:
// that helper is also called directly by handleAdminAPI (admin.go) for
// its own req/min-req/day accounting, and admin traffic must never
// contribute to the total LLM-traffic scope.
func withTotalScope(scopes []limitScope) []limitScope {
return append(scopes, limitScope{kind: totalScopeKind, id: totalScopeID, limits: nil})
}
// unifiedCostMicros resolves the price to charge one request's usage
// against: canonical ("provider/model") first, falling back to bare — the
// upstream model id alone — only when canonical has no configured price at
+40 -12
View File
@@ -127,14 +127,34 @@ func TestHandleChat_HappyPath_NonStreaming_AccountsUsage(t *testing.T) {
t.Errorf("body = %q, want verbatim upstream body %q", rec.Body.String(), respBody)
}
tok, ok := gw.limiter.getCounter("user", "alice", metricTok, windowDay, time.Now())
if !ok || tok != 15 {
t.Errorf("user token/day counter = %d (ok=%v), want 15", tok, ok)
tokIn, ok := gw.limiter.getCounter("user", "alice", metricTokIn, windowDay, time.Now())
if !ok || tokIn != 10 {
t.Errorf("user tokin/day counter = %d (ok=%v), want 10", tokIn, ok)
}
tokOut, ok := gw.limiter.getCounter("user", "alice", metricTokOut, windowDay, time.Now())
if !ok || tokOut != 5 {
t.Errorf("user tokout/day counter = %d (ok=%v), want 5", tokOut, ok)
}
reqCount, ok := gw.limiter.getCounter("user", "alice", metricReq, windowMin, time.Now())
if !ok || reqCount != 1 {
t.Errorf("user request/min counter = %d (ok=%v), want 1", reqCount, ok)
}
// withTotalScope (routes_unified.go) must have appended the synthetic
// total scope to runUnified's own checkAndCount/account calls: its
// req/tokin/tokout counters mirror alice's own (v0.2 data-layer task).
totalReq, ok := gw.limiter.getCounter(totalScopeKind, totalScopeID, metricReq, windowMin, time.Now())
if !ok || totalReq != 1 {
t.Errorf("total request/min counter = %d (ok=%v), want 1", totalReq, ok)
}
totalTokIn, ok := gw.limiter.getCounter(totalScopeKind, totalScopeID, metricTokIn, windowDay, time.Now())
if !ok || totalTokIn != 10 {
t.Errorf("total tokin/day counter = %d (ok=%v), want 10", totalTokIn, ok)
}
totalTokOut, ok := gw.limiter.getCounter(totalScopeKind, totalScopeID, metricTokOut, windowDay, time.Now())
if !ok || totalTokOut != 5 {
t.Errorf("total tokout/day counter = %d (ok=%v), want 5", totalTokOut, ok)
}
}
// TestHandleChat_Streaming_FlushesIncrementally proves a streaming chat
@@ -980,9 +1000,13 @@ func TestHandleChat_MidStreamDropAfterUsageChunk_AccountsPartialUsage(t *testing
t.Errorf("want the mid-stream error logged, got %q", logBuf.String())
}
tok, ok := gw.limiter.getCounter("user", "alice", metricTok, windowDay, time.Now())
if !ok || tok != 10 {
t.Errorf("user token/day counter = %d (ok=%v), want 10 (the usage chunk captured before the drop, 7 prompt + 3 completion)", tok, ok)
tokIn, ok := gw.limiter.getCounter("user", "alice", metricTokIn, windowDay, time.Now())
if !ok || tokIn != 7 {
t.Errorf("user tokin/day counter = %d (ok=%v), want 7 (the usage chunk captured before the drop)", tokIn, ok)
}
tokOut, ok := gw.limiter.getCounter("user", "alice", metricTokOut, windowDay, time.Now())
if !ok || tokOut != 3 {
t.Errorf("user tokout/day counter = %d (ok=%v), want 3 (the usage chunk captured before the drop)", tokOut, ok)
}
}
@@ -1183,9 +1207,13 @@ func TestHandleChat_CacheHitMiss_EndToEnd_CountersAndHeaders(t *testing.T) {
if !ok || reqCount != 1 {
t.Errorf("req:day after first request = %d (ok=%v), want 1", reqCount, ok)
}
tok, ok := gw.limiter.getCounter("user", "alice", metricTok, windowDay, time.Now())
if !ok || tok != 15 {
t.Errorf("tok:day after first request = %d (ok=%v), want 15 (10 prompt + 5 completion)", tok, ok)
tokIn, ok := gw.limiter.getCounter("user", "alice", metricTokIn, windowDay, time.Now())
if !ok || tokIn != 10 {
t.Errorf("tokin:day after first request = %d (ok=%v), want 10", tokIn, ok)
}
tokOut, ok := gw.limiter.getCounter("user", "alice", metricTokOut, windowDay, time.Now())
if !ok || tokOut != 5 {
t.Errorf("tokout:day after first request = %d (ok=%v), want 5", tokOut, ok)
}
// Second, identical request: hit.
@@ -1207,9 +1235,9 @@ func TestHandleChat_CacheHitMiss_EndToEnd_CountersAndHeaders(t *testing.T) {
if !ok || reqCount != 2 {
t.Errorf("req:day after the cache hit = %d (ok=%v), want 2 (hit still counts as one more request)", reqCount, ok)
}
tok, ok = gw.limiter.getCounter("user", "alice", metricTok, windowDay, time.Now())
if !ok || tok != 15 {
t.Errorf("tok:day after the cache hit = %d (ok=%v), want still 15 (a hit accounts zero tokens, no estimation)", tok, ok)
tokIn, ok = gw.limiter.getCounter("user", "alice", metricTokIn, windowDay, time.Now())
if !ok || tokIn != 10 {
t.Errorf("tokin:day after the cache hit = %d (ok=%v), want still 10 (a hit accounts zero tokens, no estimation)", tokIn, ok)
}
}