New: Proxy all the requests to the graphql server

Makefile

@@ -11,7 +11,7 @@ help:  ## display this help
 
 .PHONY: run
 run: build ## run application
-	@LOG_LEVEL=debug BLOCK_SCHEMA_INTROSPECTION=false JWT_ROLE_RATE_LIMIT=false JWT_ROLE_CLAIM_PATH="Hasura.x-hasura-default-role" JWT_USER_CLAIM_PATH="Hasura.x-hasura-user-id" HOST_GRAPHQL=https://hasura8.lan/v1/graphql ./graphql-proxy
+	@LOG_LEVEL=debug BLOCK_SCHEMA_INTROSPECTION=false JWT_ROLE_RATE_LIMIT=false JWT_ROLE_CLAIM_PATH="Hasura.x-hasura-default-role" JWT_USER_CLAIM_PATH="Hasura.x-hasura-user-id" HOST_GRAPHQL=https://hasura8.lan/ ./graphql-proxy
 
 .PHONY: build
 build: ## build the binary

README.md

@@ -14,7 +14,7 @@ I wanted to monitor the queries and responses of our graphql endpoint. Still, we
 
 ### Endpoints
 
-* `:8080/v1/graphql` - the graphql endpoint
+* `:8080/*` - the graphql passthrough endpoint
 * `:9393/metrics` - the prometheus metrics endpoint
 * `:8080/healthz` - the healthcheck endpoint
 
@@ -38,7 +38,7 @@ I wanted to monitor the queries and responses of our graphql endpoint. Still, we
 |---------------------------|------------------------------------------|----------------------------|
 | `MONITORING_PORT`         | The port to expose the metrics endpoint  | `9393`                     |
 | `PORT_GRAPHQL`            | The port to expose the graphql endpoint  | `8080`                     |
-| `HOST_GRAPHQL`            | The host to proxy the graphql endpoint   | `http://localhost/v1/graphql` |
+| `HOST_GRAPHQL`            | The host to proxy the graphql endpoint   | `http://localhost/` |
 | `JWT_USER_CLAIM_PATH`     | Path to the user claim in the JWT token  | ``                         |
 | `JWT_ROLE_CLAIM_PATH`     | Path to the role claim in the JWT token  | ``                         |
 | `JWT_ROLE_FROM_HEADER`    | Header name to extract the role from     | ``                         |

graphql.go

@@ -36,12 +36,13 @@ var retrospection_queries = []string{
 // Saving the introspection queries as a map O(1) operation instead of O(n) for a slice.
 var retrospectionQuerySet = make(map[string]struct{}, len(retrospection_queries))
 
-func parseGraphQLQuery(c *fiber.Ctx) (operationType, operationName string, cacheRequest bool, cache_time int, should_block bool) {
+func parseGraphQLQuery(c *fiber.Ctx) (operationType, operationName string, cacheRequest bool, cache_time int, should_block bool, should_ignore bool) {
+	should_ignore = true
 	m := make(map[string]interface{})
 	err := json.Unmarshal(c.Body(), &m)
 	if err != nil {
-		cfg.Logger.Error("Can't unmarshal the request", map[string]interface{}{"error": err.Error(), "body": string(c.Body())})
-		cfg.Monitoring.Increment(libpack_monitoring.MetricsFailed, nil)
+		cfg.Logger.Debug("Can't unmarshal the request", map[string]interface{}{"error": err.Error(), "body": string(c.Body())})
+		cfg.Monitoring.Increment(libpack_monitoring.MetricsSkipped, nil)
 		return
 	}
 	// get the query
@@ -59,6 +60,7 @@ func parseGraphQLQuery(c *fiber.Ctx) (operationType, operationName string, cache
 		return
 	}
 
+	should_ignore = false
 	operationName = "undefined"
 	for _, d := range p.Definitions {
 		if oper, ok := d.(*ast.OperationDefinition); ok {

main.go

@@ -20,7 +20,7 @@ func parseConfig() {
 	var c config
 	c.Server.PortGraphQL = envutil.GetInt("PORT_GRAPHQL", 8080)
 	c.Server.PortMonitoring = envutil.GetInt("MONITORING_PORT", 9393)
-	c.Server.HostGraphQL = envutil.Getenv("HOST_GRAPHQL", "http://localhost/v1/graphql")
+	c.Server.HostGraphQL = envutil.Getenv("HOST_GRAPHQL", "http://localhost/")
 	c.Client.JWTUserClaimPath = envutil.Getenv("JWT_USER_CLAIM_PATH", "")
 	c.Client.JWTRoleClaimPath = envutil.Getenv("JWT_ROLE_CLAIM_PATH", "")
 	c.Client.RoleFromHeader = envutil.Getenv("ROLE_FROM_HEADER", "")

proxy.go

@@ -16,7 +16,7 @@ func proxyTheRequest(c *fiber.Ctx) error {
 		InsecureSkipVerify: true,
 	})
 
-	err := proxy.DoRedirects(c, cfg.Server.HostGraphQL, 3)
+	err := proxy.DoRedirects(c, cfg.Server.HostGraphQL+c.Path(), 3)
 	if err != nil {
 		cfg.Logger.Error("Can't proxy the request", map[string]interface{}{"error": err.Error()})
 		cfg.Monitoring.Increment(libpack_monitoring.MetricsFailed, nil)

server.go

@@ -21,7 +21,8 @@ func StartHTTPProxy() {
 		AllowOrigins: "*",
 	}))
 
-	server.Post("/v1/graphql", processGraphQLRequest)
+	server.Post("/*", processGraphQLRequest)
+	server.Get("/*", proxyTheRequest)
 
 	server.Get("/healthz", healthCheck)
 	err := server.Listen(fmt.Sprintf(":%d", cfg.Server.PortGraphQL))
@@ -70,11 +71,16 @@ func processGraphQLRequest(c *fiber.Ctx) error {
 		}
 	}
 
-	opType, opName, cacheFromQuery, cache_time, shouldBlock := parseGraphQLQuery(c)
+	opType, opName, cacheFromQuery, cache_time, shouldBlock, should_ignore := parseGraphQLQuery(c)
 	if shouldBlock {
 		return nil
 	}
 
+	if should_ignore {
+		cfg.Logger.Debug("Request passed as-is - not a GraphQL")
+		return proxyTheRequest(c)
+	}
+
 	if cache_time > 0 {
 		cfg.Logger.Debug("Cache time set via query", map[string]interface{}{"cache_time": cache_time})
 		cache_time = cfg.Cache.CacheTTL