mirror of
https://github.com/lukaszraczylo/mcp-captcharesolver.git
synced 2026-10-12 00:45:28 +00:00
lukaszraczylo
22775d446e
- Convert assets/evasions.js to evasions.js.tmpl (Go text/template) - Placeholders: WebGLVendor, WebGLRenderer, Platform, Languages - Add navigator.platform spoof from fingerprint - ScriptParams gains OS, Browser, Locale, Seed fields (fieldalignment ordered) - ScriptResult gains Fingerprint field — returns the identity the script was rendered for - StealthScript calls GenerateFingerprint and renders template; single call gives both script and coherent fingerprint - languagesJS: locale to JS list (en-GB -> 'en-GB', 'en') - Template parsed once at init via template.Must - StealthScriptIn in tools.go gains OS, Browser, Locale, Seed pass-through - Tests: added TestStealthScriptCoherence asserting rendered values match fingerprint
107 lines
3.3 KiB
Go
107 lines
3.3 KiB
Go
package stealth
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import (
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_ "embed"
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"bytes"
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"fmt"
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"strings"
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"text/template"
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)
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//go:embed assets/evasions.js.tmpl
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var evasionsTmplSrc string
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// evasionTmpl is parsed once at startup; template.Must panics on bad syntax.
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var evasionTmpl = template.Must(template.New("evasions").Parse(evasionsTmplSrc))
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// ScriptParams selects identity and target engine for apply instructions.
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// Fields ordered for fieldalignment (largest to smallest, then strings).
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type ScriptParams struct {
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Seed uint64 // deterministic generation; 0 → random
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OS string // windows | macos | linux
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Browser string // chrome
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Locale string // e.g. en-US, en-GB
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Engine string // playwright | cdp | generic
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}
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// ApplyInfo tells the caller how to inject the script.
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type ApplyInfo struct {
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How string `json:"how"`
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API string `json:"api"`
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}
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// ScriptResult is the injectable evasion bundle plus metadata.
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type ScriptResult struct {
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Script string `json:"script"`
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Apply ApplyInfo `json:"apply"`
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Fingerprint Fingerprint `json:"fingerprint"`
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IncludedEvasions []string `json:"included_evasions"`
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}
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// evasionData is the template data bag.
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type evasionData struct {
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WebGLVendor string
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WebGLRenderer string
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Platform string
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Languages string // pre-rendered JS list, e.g. 'en-GB', 'en'
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}
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// languagesJS converts a locale string to a JS list of quoted language tags.
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// "en-GB" → `'en-GB', 'en'`; "en" → `'en'`; "" → `'en-US', 'en'`
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func languagesJS(locale string) string {
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if locale == "" {
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locale = "en-US"
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}
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parts := strings.SplitN(locale, "-", 2)
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if len(parts) == 2 && parts[0] != locale {
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return fmt.Sprintf("'%s', '%s'", locale, parts[0])
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}
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return fmt.Sprintf("'%s'", locale)
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}
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// StealthScript returns an evasion init script rendered from a coherent
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// Fingerprint, plus engine-specific apply hints. The Fingerprint used for
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// rendering is included in ScriptResult so callers can apply it without a
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// second call. Empty params produce valid output (windows/chrome/en-US defaults).
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func StealthScript(p ScriptParams) ScriptResult {
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fp := GenerateFingerprint(FingerprintParams{
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OS: p.OS,
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Browser: p.Browser,
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Locale: p.Locale,
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Seed: p.Seed,
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})
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var buf bytes.Buffer
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// Execute errors are non-fatal — the template is static aside from the data
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// substitution; if it somehow fails, fall back to a descriptive comment.
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if err := evasionTmpl.Execute(&buf, evasionData{
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WebGLVendor: fp.WebGLVendor,
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WebGLRenderer: fp.WebGLRenderer,
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Platform: fp.Platform,
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Languages: languagesJS(fp.Locale),
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}); err != nil {
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// Fallback: return an empty-IIFE comment so the script is valid JS.
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buf.Reset()
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fmt.Fprintf(&buf, "(() => { /* evasion render error: %v */ })();", err)
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}
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apply := ApplyInfo{How: "Inject before any page script runs.", API: "page.addInitScript(script)"}
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switch p.Engine {
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case "cdp":
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apply.API = "Page.addScriptToEvaluateOnNewDocument({source: script})"
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case "generic", "":
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apply.API = "evaluate the script on every new document before navigation"
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}
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return ScriptResult{
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Script: buf.String(),
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Apply: apply,
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Fingerprint: fp,
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IncludedEvasions: []string{
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"navigator.webdriver", "navigator.languages", "navigator.platform",
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"navigator.plugins", "chrome.runtime", "permissions.query",
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"WebGL vendor/renderer",
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},
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}
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}
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