fix: fix envoy tests

integration/.env

@@ -0,0 +1,16 @@
+# Nginx configuration
+NGINX_VERSION=1.29
+
+# Whoami configuration
+WHOAMI_VERSION=latest
+
+# Traefik configuration
+TRAEFIK_VERSION=v3.6
+TINYAUTH_HOST=tinyauth.127.0.0.1.sslip.io
+WHOAMI_HOST=whoami.127.0.0.1.sslip.io
+
+# Envoy configuration
+ENVOY_VERSION=v1.33-latest
+
+# Tinyauth configuration
+TINYAUTH_VERSION=dev

integration/config.yml

@@ -0,0 +1,15 @@
+appUrl: http://tinyauth.127.0.0.1.sslip.io
+
+auth:
+  users: test:$2a$10$eG88kFow83l5YRSlTSL2o.sZimjxFHrpiKdaSUZqpLBGX7Y2.4PZG
+
+log:
+  json: true
+  level: trace
+
+apps:
+  whoami:
+    config:
+      domain: whoami.127.0.0.1.sslip.io
+    path:
+      allow: /allow

integration/docker-compose.envoy.yml

@@ -0,0 +1,16 @@
+services:
+  envoy:
+    image: envoyproxy/envoy:${ENVOY_VERSION}
+    ports:
+      - 80:80
+    volumes:
+      - ./envoy.yml:/etc/envoy/envoy.yaml:ro
+
+  whoami:
+    image: traefik/whoami:${WHOAMI_VERSION}
+
+  tinyauth:
+    image: ghcr.io/steveiliop56/tinyauth:${TINYAUTH_VERSION}
+    command: --experimental.configfile=/data/config.yml
+    volumes:
+      - ./config.yml:/data/config.yml:ro

integration/docker-compose.nginx.yml

@@ -0,0 +1,16 @@
+services:
+  nginx:
+    image: nginx:${NGINX_VERSION}
+    ports:
+      - 80:80
+    volumes:
+      - ./nginx.conf:/etc/nginx/conf.d/default.conf:ro
+
+  whoami:
+    image: traefik/whoami:${WHOAMI_VERSION}
+
+  tinyauth:
+    image: ghcr.io/steveiliop56/tinyauth:${TINYAUTH_VERSION}
+    command: --experimental.configfile=/data/config.yml
+    volumes:
+      - ./config.yml:/data/config.yml:ro

integration/docker-compose.traefik.yml

@@ -0,0 +1,28 @@
+services:
+  traefik:
+    image: traefik:${TRAEFIK_VERSION}
+    command: |
+      --api.insecure=true
+      --providers.docker
+      --entryPoints.web.address=:80
+    ports:
+      - 80:80
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+
+  whoami:
+    image: traefik/whoami:${WHOAMI_VERSION}
+    labels:
+      traefik.enable: true
+      traefik.http.routers.whoami.rule: Host(`${WHOAMI_HOST}`)
+      traefik.http.routers.whoami.middlewares: tinyauth
+
+  tinyauth:
+    image: ghcr.io/steveiliop56/tinyauth:${TINYAUTH_VERSION}
+    command: --experimental.configfile=/data/config.yml
+    volumes:
+      - ./config.yml:/data/config.yml:ro
+    labels:
+      traefik.enable: true
+      traefik.http.routers.tinyauth.rule: Host(`${TINYAUTH_HOST}`)
+      traefik.http.middlewares.tinyauth.forwardauth.address: http://tinyauth:3000/api/auth/traefik

integration/envoy.yml

@@ -0,0 +1,105 @@
+static_resources:
+  listeners:
+    - name: "listener_http"
+      address:
+        socket_address:
+          address: "0.0.0.0"
+          port_value: 80
+      filter_chains:
+        - filters:
+            - name: "envoy.filters.network.http_connection_manager"
+              typed_config:
+                "@type": "type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager"
+                stat_prefix: "ingress_http"
+                use_remote_address: true
+                skip_xff_append: false
+                route_config:
+                  name: "local_route"
+                  virtual_hosts:
+                    - name: "whoami_service"
+                      domains: ["whoami.127.0.0.1.sslip.io"]
+                      routes:
+                        - match:
+                            prefix: "/"
+                          route:
+                            cluster: "whoami"
+                    - name: "tinyauth_service"
+                      domains: ["tinyauth.127.0.0.1.sslip.io"]
+                      typed_per_filter_config:
+                        envoy.filters.http.ext_authz:
+                          "@type": "type.googleapis.com/envoy.extensions.filters.http.ext_authz.v3.ExtAuthzPerRoute"
+                          disabled: true
+                      routes:
+                        - match:
+                            prefix: "/"
+                          route:
+                            cluster: "tinyauth"
+                http_filters:
+                  - name: "envoy.filters.http.ext_authz"
+                    typed_config:
+                      "@type": "type.googleapis.com/envoy.extensions.filters.http.ext_authz.v3.ExtAuthz"
+                      transport_api_version: "v3"
+                      http_service:
+                        path_prefix: "/api/auth/envoy?path="
+                        server_uri:
+                          uri: "tinyauth:3000"
+                          cluster: "tinyauth"
+                          timeout: "0.25s"
+                        authorization_request:
+                          allowed_headers:
+                            patterns:
+                              - exact: "authorization"
+                              - exact: "accept"
+                              - exact: "cookie"
+                          headers_to_add:
+                            - key: "x-forwarded-proto"
+                              value: "%REQ(:SCHEME)%"
+                            - key: "x-forwarded-host"
+                              value: "%REQ(:AUTHORITY)%"
+                            - key: "x-forwarded-uri"
+                              value: "%REQ(:PATH)%"
+                        authorization_response:
+                          allowed_upstream_headers:
+                            patterns:
+                              - prefix: "remote-"
+                          allowed_client_headers:
+                            patterns:
+                              - exact: "set-cookie"
+                              - exact: "location"
+                          allowed_client_headers_on_success:
+                            patterns:
+                              - exact: "set-cookie"
+                              - exact: "location"
+                      failure_mode_allow: false
+                  - name: "envoy.filters.http.router"
+                    typed_config:
+                      "@type": "type.googleapis.com/envoy.extensions.filters.http.router.v3.Router"
+  clusters:
+    - name: "whoami"
+      connect_timeout: "0.25s"
+      type: "logical_dns"
+      dns_lookup_family: "v4_only"
+      lb_policy: "round_robin"
+      load_assignment:
+        cluster_name: "whoami"
+        endpoints:
+          - lb_endpoints:
+              - endpoint:
+                  address:
+                    socket_address:
+                      address: "whoami"
+                      port_value: 80
+    - name: "tinyauth"
+      connect_timeout: "0.25s"
+      type: "logical_dns"
+      dns_lookup_family: "v4_only"
+      lb_policy: "round_robin"
+      load_assignment:
+        cluster_name: "tinyauth"
+        endpoints:
+          - lb_endpoints:
+              - endpoint:
+                  address:
+                    socket_address:
+                      address: "tinyauth"
+                      port_value: 3000

integration/integrarion_tests.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+)
+
+func testUnauthorized(client *http.Client) error {
+	req, err := http.NewRequest("GET", WhoamiURL, nil)
+	if err != nil {
+		return err
+	}
+	resp, err := client.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return err
+	}
+	// nginx and envoy will throw us at the frontend
+	if resp.StatusCode != http.StatusUnauthorized && !strings.Contains(string(body), "<div id=\"root\"></div>") {
+		return fmt.Errorf("expected status code %d or to to contain '<div id=\"root\"></div>', got %d", http.StatusUnauthorized, resp.StatusCode)
+	}
+	return nil
+}
+
+func testLoggedIn(client *http.Client) error {
+	req, err := http.NewRequest("GET", WhoamiURL, nil)
+	if err != nil {
+		return err
+	}
+	req.SetBasicAuth(DefaultUsername, DefaultPassword)
+	resp, err := client.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("expected status code %d, got %d", http.StatusOK, resp.StatusCode)
+	}
+	return nil
+}
+
+func testACLAllowed(client *http.Client) error {
+	req, err := http.NewRequest("GET", WhoamiURL+"/allow", nil)
+	if err != nil {
+		return err
+	}
+	resp, err := client.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("expected status code %d, got %d", http.StatusOK, resp.StatusCode)
+	}
+	return nil
+}

integration/integration.go

@@ -0,0 +1,166 @@
+package main
+
+import (
+	"bufio"
+	"context"
+	"errors"
+	"flag"
+	"fmt"
+	"log/slog"
+	"net/http"
+	"os"
+	"os/exec"
+	"time"
+)
+
+var ProxiesToTest = []string{"traefik", "nginx", "envoy"}
+
+const (
+	EnvFile    = ".env"
+	ConfigFile = "config.yml"
+)
+
+const (
+	TinyauthURL = "http://tinyauth.127.0.0.1.sslip.io"
+	WhoamiURL   = "http://whoami.127.0.0.1.sslip.io"
+)
+
+const (
+	DefaultUsername = "test"
+	DefaultPassword = "password"
+)
+
+func main() {
+	logFlag := flag.Bool("log", false, "enable stack logging")
+	flag.Parse()
+
+	for _, proxy := range ProxiesToTest {
+		slog.Info("begin", "proxy", proxy)
+		compose := fmt.Sprintf("docker-compose.%s.yml", proxy)
+		if _, err := os.Stat(compose); err != nil {
+			slog.Error("fail", "proxy", proxy, "error", err)
+			os.Exit(1)
+		}
+		if err := createInstanceAndRunTests(compose, *logFlag, proxy); err != nil {
+			slog.Error("fail", "proxy", proxy, "error", err)
+			os.Exit(1)
+		}
+		slog.Info("end", "proxy", proxy)
+	}
+}
+
+func runTests(client *http.Client, name string) error {
+	if err := testUnauthorized(client); err != nil {
+		slog.Error("fail unauthorized test", "name", name)
+		return err
+	}
+
+	slog.Info("unauthorized test passed", "name", name)
+
+	if err := testLoggedIn(client); err != nil {
+		slog.Error("fail logged in test", "name", name)
+		return err
+	}
+
+	slog.Info("logged in test passed", "name", name)
+
+	if err := testACLAllowed(client); err != nil {
+		slog.Error("fail acl test", "name", name)
+		return err
+	}
+
+	slog.Info("acl test passed", "name", name)
+
+	return nil
+}
+
+func createInstanceAndRunTests(compose string, log bool, name string) error {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	cmdArgs := []string{"compose", "-f", compose, "--env-file", EnvFile, "up", "--build", "--force-recreate", "--remove-orphans"}
+	cmd := exec.CommandContext(ctx, "docker", cmdArgs...)
+
+	if log {
+		setupCmdLogging(cmd)
+	}
+
+	if err := cmd.Start(); err != nil {
+		return err
+	}
+
+	defer func() {
+		cmd.Process.Signal(os.Interrupt)
+		cmd.Wait()
+	}()
+
+	slog.Info("instance created", "name", name)
+
+	if err := waitForHealthy(); err != nil {
+		return err
+	}
+
+	slog.Info("instance healthy", "name", name)
+
+	client := &http.Client{}
+
+	if err := runTests(client, name); err != nil {
+		return err
+	}
+
+	slog.Info("tests passed", "name", name)
+
+	cmd.Process.Signal(os.Interrupt)
+
+	if err := cmd.Wait(); cmd.ProcessState.ExitCode() != 130 && err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func setupCmdLogging(cmd *exec.Cmd) {
+	stdout, _ := cmd.StdoutPipe()
+	stderr, _ := cmd.StderrPipe()
+
+	go func() {
+		scanner := bufio.NewScanner(stdout)
+		for scanner.Scan() {
+			slog.Info("docker out", "stdout", scanner.Text())
+		}
+	}()
+
+	go func() {
+		scanner := bufio.NewScanner(stderr)
+		for scanner.Scan() {
+			slog.Error("docker out", "stderr", scanner.Text())
+		}
+	}()
+}
+
+func waitForHealthy() error {
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Minute)
+	defer cancel()
+
+	ticker := time.NewTicker(10 * time.Second)
+	client := http.Client{}
+
+	for {
+		select {
+		case <-ctx.Done():
+			return errors.New("tinyauth not healthy after 5 minutes")
+		case <-ticker.C:
+			req, err := http.NewRequestWithContext(ctx, "GET", TinyauthURL+"/api/healthz", nil)
+			if err != nil {
+				return err
+			}
+			res, err := client.Do(req)
+			if err != nil {
+				continue
+			}
+			if res.StatusCode == http.StatusOK {
+				return nil
+			}
+		}
+	}
+}

integration/nginx.conf

@@ -0,0 +1,36 @@
+server {
+    listen 80;
+    listen [::]:80;
+
+    server_name tinyauth.127.0.0.1.sslip.io;
+
+    location / {
+        proxy_pass http://tinyauth:3000;
+    }
+}
+
+server {
+    listen 80;
+    listen [::]:80;
+
+    server_name whoami.127.0.0.1.sslip.io;
+
+    location / {
+        proxy_pass http://whoami;
+        auth_request /tinyauth;
+        error_page 401 = @tinyauth_login;
+    }
+
+    location /tinyauth {
+        internal;
+        proxy_pass http://tinyauth:3000/api/auth/nginx;
+        proxy_set_header x-original-url $scheme://$http_host$request_uri;
+        proxy_set_header x-forwarded-proto $scheme;
+        proxy_set_header x-forwarded-host $host;
+        proxy_set_header x-forwarded-uri $request_uri;
+    }
+
+    location @tinyauth_login {
+      return 302 http://tinyauth.127.0.0.1.sslip.io/login?redirect_uri=$scheme://$http_host$request_uri;
+    }
+}

internal/controller/proxy_controller.go

@@ -1,9 +1,11 @@
 package controller
 
 import (
+	"errors"
 	"fmt"
 	"net/http"
-	"slices"
+	"net/url"
+	"regexp"
 	"strings"
 
 	"github.com/steveiliop56/tinyauth/internal/config"
@@ -15,12 +17,31 @@ import (
 	"github.com/google/go-querystring/query"
 )
 
+type RequestType int
+
+const (
+	AuthRequest RequestType = iota
+	ExtAuthz
+	ForwardAuth
+)
+
+var BrowserUserAgentRegex = regexp.MustCompile("Chrome|Gecko|AppleWebKit|Opera|Edge")
+
 var SupportedProxies = []string{"nginx", "traefik", "caddy", "envoy"}
 
 type Proxy struct {
 	Proxy string `uri:"proxy" binding:"required"`
 }
 
+type ProxyContext struct {
+	Host      string
+	Proto     string
+	Path      string
+	Method    string
+	Type      RequestType
+	IsBrowser bool
+}
+
 type ProxyControllerConfig struct {
 	AppURL string
 }
@@ -43,82 +64,30 @@ func NewProxyController(config ProxyControllerConfig, router *gin.RouterGroup, a
 
 func (controller *ProxyController) SetupRoutes() {
 	proxyGroup := controller.router.Group("/auth")
-	// There is a later check to control allowed methods per proxy
 	proxyGroup.Any("/:proxy", controller.proxyHandler)
 }
 
 func (controller *ProxyController) proxyHandler(c *gin.Context) {
-	var req Proxy
+	// Load proxy context based on the request type
+	proxyCtx, err := controller.getProxyContext(c)
 
-	err := c.BindUri(&req)
 	if err != nil {
-		tlog.App.Error().Err(err).Msg("Failed to bind URI")
+		tlog.App.Warn().Err(err).Msg("Failed to get proxy context")
 		c.JSON(400, gin.H{
 			"status":  400,
-			"message": "Bad Request",
+			"message": "Bad request",
 		})
 		return
 	}
 
-	if !slices.Contains(SupportedProxies, req.Proxy) {
-		tlog.App.Warn().Str("proxy", req.Proxy).Msg("Invalid proxy")
-		c.JSON(400, gin.H{
-			"status":  400,
-			"message": "Bad Request",
-		})
-		return
-	}
-
-	// Only allow GET for non-envoy proxies.
-	// Envoy uses the original client method for the external auth request
-	// so we allow Any standard HTTP method for /api/auth/envoy
-	if req.Proxy != "envoy" && c.Request.Method != http.MethodGet {
-		tlog.App.Warn().Str("method", c.Request.Method).Msg("Invalid method for proxy")
-		c.Header("Allow", "GET")
-		c.JSON(405, gin.H{
-			"status":  405,
-			"message": "Method Not Allowed",
-		})
-		return
-	}
-
-	isBrowser := strings.Contains(c.Request.Header.Get("Accept"), "text/html")
-
-	if isBrowser {
-		tlog.App.Debug().Msg("Request identified as (most likely) coming from a browser")
-	} else {
-		tlog.App.Debug().Msg("Request identified as (most likely) coming from a non-browser client")
-	}
-
-	// We are not marking the URI as a required header because it may be missing
-	// and we only use it for the auth enabled check which will simply not match
-	// if the header is missing. For deployments like Kubernetes, we use the
-	// x-original-uri header instead.
-	uri, ok := controller.getHeader(c, "x-forwarded-uri")
-
-	if !ok {
-		originalUri, ok := controller.getHeader(c, "x-original-uri")
-		if ok {
-			uri = originalUri
-		}
-	}
-
-	host, ok := controller.requireHeader(c, "x-forwarded-host")
-	if !ok {
-		return
-	}
-
-	proto, ok := controller.requireHeader(c, "x-forwarded-proto")
-	if !ok {
-		return
-	}
+	tlog.App.Trace().Interface("ctx", proxyCtx).Msg("Got proxy context")
 
 	// Get acls
-	acls, err := controller.acls.GetAccessControls(host)
+	acls, err := controller.acls.GetAccessControls(proxyCtx.Host)
 
 	if err != nil {
 		tlog.App.Error().Err(err).Msg("Failed to get access controls for resource")
-		controller.handleError(c, req, isBrowser)
+		controller.handleError(c, proxyCtx)
 		return
 	}
 
@@ -135,11 +104,11 @@ func (controller *ProxyController) proxyHandler(c *gin.Context) {
 		return
 	}
 
-	authEnabled, err := controller.auth.IsAuthEnabled(uri, acls.Path)
+	authEnabled, err := controller.auth.IsAuthEnabled(proxyCtx.Path, acls.Path)
 
 	if err != nil {
 		tlog.App.Error().Err(err).Msg("Failed to check if auth is enabled for resource")
-		controller.handleError(c, req, isBrowser)
+		controller.handleError(c, proxyCtx)
 		return
 	}
 
@@ -154,7 +123,7 @@ func (controller *ProxyController) proxyHandler(c *gin.Context) {
 	}
 
 	if !controller.auth.CheckIP(acls.IP, clientIP) {
-		if req.Proxy == "nginx" || !isBrowser {
+		if !controller.useFriendlyError(proxyCtx) {
 			c.JSON(401, gin.H{
 				"status":  401,
 				"message": "Unauthorized",
@@ -163,7 +132,7 @@ func (controller *ProxyController) proxyHandler(c *gin.Context) {
 		}
 
 		queries, err := query.Values(config.UnauthorizedQuery{
-			Resource: strings.Split(host, ".")[0],
+			Resource: strings.Split(proxyCtx.Host, ".")[0],
 			IP:       clientIP,
 		})
 
@@ -196,9 +165,9 @@ func (controller *ProxyController) proxyHandler(c *gin.Context) {
 		userAllowed := controller.auth.IsUserAllowed(c, userContext, acls)
 
 		if !userAllowed {
-			tlog.App.Warn().Str("user", userContext.Username).Str("resource", strings.Split(host, ".")[0]).Msg("User not allowed to access resource")
+			tlog.App.Warn().Str("user", userContext.Username).Str("resource", strings.Split(proxyCtx.Host, ".")[0]).Msg("User not allowed to access resource")
 
-			if req.Proxy == "nginx" || !isBrowser {
+			if !controller.useFriendlyError(proxyCtx) {
 				c.JSON(403, gin.H{
 					"status":  403,
 					"message": "Forbidden",
@@ -207,7 +176,7 @@ func (controller *ProxyController) proxyHandler(c *gin.Context) {
 			}
 
 			queries, err := query.Values(config.UnauthorizedQuery{
-				Resource: strings.Split(host, ".")[0],
+				Resource: strings.Split(proxyCtx.Host, ".")[0],
 			})
 
 			if err != nil {
@@ -236,9 +205,9 @@ func (controller *ProxyController) proxyHandler(c *gin.Context) {
 			}
 
 			if !groupOK {
-				tlog.App.Warn().Str("user", userContext.Username).Str("resource", strings.Split(host, ".")[0]).Msg("User groups do not match resource requirements")
+				tlog.App.Warn().Str("user", userContext.Username).Str("resource", strings.Split(proxyCtx.Host, ".")[0]).Msg("User groups do not match resource requirements")
 
-				if req.Proxy == "nginx" || !isBrowser {
+				if !controller.useFriendlyError(proxyCtx) {
 					c.JSON(403, gin.H{
 						"status":  403,
 						"message": "Forbidden",
@@ -247,7 +216,7 @@ func (controller *ProxyController) proxyHandler(c *gin.Context) {
 				}
 
 				queries, err := query.Values(config.UnauthorizedQuery{
-					Resource: strings.Split(host, ".")[0],
+					Resource: strings.Split(proxyCtx.Host, ".")[0],
 					GroupErr: true,
 				})
 
@@ -289,7 +258,7 @@ func (controller *ProxyController) proxyHandler(c *gin.Context) {
 		return
 	}
 
-	if req.Proxy == "nginx" || !isBrowser {
+	if !controller.useFriendlyError(proxyCtx) {
 		c.JSON(401, gin.H{
 			"status":  401,
 			"message": "Unauthorized",
@@ -298,7 +267,7 @@ func (controller *ProxyController) proxyHandler(c *gin.Context) {
 	}
 
 	queries, err := query.Values(config.RedirectQuery{
-		RedirectURI: fmt.Sprintf("%s://%s%s", proto, host, uri),
+		RedirectURI: fmt.Sprintf("%s://%s%s", proxyCtx.Proto, proxyCtx.Host, proxyCtx.Path),
 	})
 
 	if err != nil {
@@ -328,8 +297,8 @@ func (controller *ProxyController) setHeaders(c *gin.Context, acls config.App) {
 	}
 }
 
-func (controller *ProxyController) handleError(c *gin.Context, req Proxy, isBrowser bool) {
-	if req.Proxy == "nginx" || !isBrowser {
+func (controller *ProxyController) handleError(c *gin.Context, proxyCtx ProxyContext) {
+	if !controller.useFriendlyError(proxyCtx) {
 		c.JSON(500, gin.H{
 			"status":  500,
 			"message": "Internal Server Error",
@@ -340,20 +309,166 @@ func (controller *ProxyController) handleError(c *gin.Context, req Proxy, isBrow
 	c.Redirect(http.StatusTemporaryRedirect, fmt.Sprintf("%s/error", controller.config.AppURL))
 }
 
-func (controller *ProxyController) requireHeader(c *gin.Context, header string) (string, bool) {
-	val, ok := controller.getHeader(c, header)
-	if !ok {
-		tlog.App.Error().Str("header", header).Msg("Header not found")
-		c.JSON(400, gin.H{
-			"status":  400,
-			"message": "Bad Request",
-		})
-		return "", false
-	}
-	return val, true
-}
-
 func (controller *ProxyController) getHeader(c *gin.Context, header string) (string, bool) {
 	val := c.Request.Header.Get(header)
 	return val, strings.TrimSpace(val) != ""
 }
+
+func (controller *ProxyController) useFriendlyError(proxyCtx ProxyContext) bool {
+	return (proxyCtx.Type == ForwardAuth || proxyCtx.Type == ExtAuthz) && proxyCtx.IsBrowser
+}
+
+// Code below is inspired from https://github.com/authelia/authelia/blob/master/internal/handlers/handler_authz.go
+// and thus it may be subject to Apache 2.0 License
+func (controller *ProxyController) getForwardAuthContext(c *gin.Context) (ProxyContext, error) {
+	host, ok := controller.getHeader(c, "x-forwarded-host")
+
+	if !ok {
+		return ProxyContext{}, errors.New("x-forwarded-host not found")
+	}
+
+	uri, ok := controller.getHeader(c, "x-forwarded-uri")
+
+	if !ok {
+		return ProxyContext{}, errors.New("x-forwarded-uri not found")
+	}
+
+	proto, ok := controller.getHeader(c, "x-forwarded-proto")
+
+	if !ok {
+		return ProxyContext{}, errors.New("x-forwarded-proto not found")
+	}
+
+	method := c.Request.Method
+
+	if method != http.MethodGet {
+		return ProxyContext{}, errors.New("method not allowed")
+	}
+
+	return ProxyContext{
+		Host:   host,
+		Proto:  proto,
+		Path:   uri,
+		Method: method,
+		Type:   ForwardAuth,
+	}, nil
+}
+
+func (controller *ProxyController) getAuthRequestContext(c *gin.Context) (ProxyContext, error) {
+	xOriginalUrl, ok := controller.getHeader(c, "x-original-url")
+
+	if !ok {
+		return ProxyContext{}, errors.New("x-original-url not found")
+	}
+
+	url, err := url.Parse(xOriginalUrl)
+
+	if err != nil {
+		return ProxyContext{}, err
+	}
+
+	host := url.Host
+	proto := url.Scheme
+	path := url.Path
+	method := c.Request.Method
+
+	if method != http.MethodGet {
+		return ProxyContext{}, errors.New("method not allowed")
+	}
+
+	return ProxyContext{
+		Host:   host,
+		Proto:  proto,
+		Path:   path,
+		Method: method,
+		Type:   AuthRequest,
+	}, nil
+}
+
+func (controller *ProxyController) getExtAuthzContext(c *gin.Context) (ProxyContext, error) {
+	proto, ok := controller.getHeader(c, "x-forwarded-proto")
+
+	if !ok {
+		return ProxyContext{}, errors.New("x-forwarded-proto not found")
+	}
+
+	host, ok := controller.getHeader(c, "host")
+
+	if !ok {
+		return ProxyContext{}, errors.New("host not found")
+	}
+
+	// Seems like we can't get the path?
+
+	// For envoy we need to support every method
+	method := c.Request.Method
+
+	return ProxyContext{
+		Host:   host,
+		Proto:  proto,
+		Method: method,
+		Type:   ExtAuthz,
+	}, nil
+}
+
+func (controller *ProxyController) getProxyContext(c *gin.Context) (ProxyContext, error) {
+	var req Proxy
+
+	err := c.BindUri(&req)
+	if err != nil {
+		return ProxyContext{}, err
+	}
+
+	var ctx ProxyContext
+
+	switch req.Proxy {
+	// For nginx we need to handle both forward_auth and auth_request extraction since it can be
+	// used either with something line nginx proxy manager with advanced config or with
+	// the kubernetes ingress controller
+	case "nginx":
+		tlog.App.Debug().Str("proxy", req.Proxy).Msg("Attempting forward_auth compatible extraction")
+		forwardAuthCtx, err := controller.getForwardAuthContext(c)
+		if err == nil {
+			tlog.App.Debug().Str("proxy", req.Proxy).Msg("Extractions success using forward_auth")
+			ctx = forwardAuthCtx
+		} else {
+			tlog.App.Debug().Str("proxy", req.Proxy).Msg("Extractions failed using forward_auth trying with auth_request")
+			authRequestCtx, err := controller.getAuthRequestContext(c)
+			if err != nil {
+				tlog.App.Warn().Str("proxy", req.Proxy).Msg("Failed to determine required module for header extraction")
+				return ProxyContext{}, err
+			}
+			ctx = authRequestCtx
+		}
+	case "envoy":
+		tlog.App.Debug().Str("proxy", req.Proxy).Msg("Attempting ext_authz compatible extraction")
+		extAuthzCtx, err := controller.getExtAuthzContext(c)
+		if err != nil {
+			tlog.App.Warn().Str("proxy", req.Proxy).Msg("Failed to determine required module for header extraction")
+			return ProxyContext{}, err
+		}
+		ctx = extAuthzCtx
+	// By default we fallback to the forward_auth module which supports most proxies like traefik or caddy
+	default:
+		tlog.App.Debug().Str("proxy", req.Proxy).Msg("Attempting forward_auth compatible extraction")
+		forwardAuthCtx, err := controller.getForwardAuthContext(c)
+		if err != nil {
+			tlog.App.Warn().Str("proxy", req.Proxy).Msg("Failed to determine required module for header extraction")
+			return ProxyContext{}, err
+		}
+		ctx = forwardAuthCtx
+	}
+
+	// We don't care if the header is empty, we will just assume it's not a browser
+	userAgent, _ := controller.getHeader(c, "user-agent")
+	isBrowser := BrowserUserAgentRegex.MatchString(userAgent)
+
+	if isBrowser {
+		tlog.App.Debug().Msg("Request identified as (most likely) coming from a browser")
+	} else {
+		tlog.App.Debug().Msg("Request identified as (most likely) coming from a non-browser client")
+	}
+
+	ctx.IsBrowser = isBrowser
+	return ctx, nil
+}