Resolves conflicts(gorilla#515)

.circleci/config.yml

@@ -1,87 +1,70 @@
-version: 2.0
+version: 2.1
 
 jobs:
-  # Base test configuration for Go library tests Each distinct version should
-  # inherit this base, and override (at least) the container image used.
-  "test": &test
+  "test":
+    parameters:
+      version:
+        type: string
+        default: "latest"
+      golint:
+        type: boolean
+        default: true
+      modules:
+        type: boolean
+        default: true
+      goproxy:
+        type: string
+        default: ""
     docker:
-      - image: circleci/golang:latest
+      - image: "circleci/golang:<< parameters.version >>"
     working_directory: /go/src/github.com/gorilla/mux
-    steps: &steps
-      # Our build steps: we checkout the repo, fetch our deps, lint, and finally
-      # run "go test" on the package.
+    environment:
+      GO111MODULE: "on"
+      GOPROXY: "<< parameters.goproxy >>"
+    steps:
       - checkout
-      # Logs the version in our build logs, for posterity
-      - run: go version
+      - run:
+          name: "Print the Go version"
+          command: >
+            go version
       - run:
           name: "Fetch dependencies"
           command: >
-            go get -t -v ./...
+            if [[ << parameters.modules >> = true ]]; then
+              go mod download
+              export GO111MODULE=on
+            else
+              go get -v ./...
+            fi
       # Only run gofmt, vet & lint against the latest Go version
       - run:
           name: "Run golint"
           command: >
-            if [ "${LATEST}" = true ] && [ -z "${SKIP_GOLINT}" ]; then
+            if [ << parameters.version >> = "latest" ] && [ << parameters.golint >> = true ]; then
               go get -u golang.org/x/lint/golint
               golint ./...
             fi
       - run:
           name: "Run gofmt"
           command: >
-            if [[ "${LATEST}" = true ]]; then
+            if [[ << parameters.version >> = "latest" ]]; then
               diff -u <(echo -n) <(gofmt -d -e .)
             fi
       - run:
           name: "Run go vet"
-          command:  >
-            if [[ "${LATEST}" = true ]]; then
+          command: >
+            if [[ << parameters.version >> = "latest" ]]; then
               go vet -v ./...
             fi
-      - run: go test -v -race ./...
-
-  "latest":
-    <<: *test
-    environment:
-      LATEST: true
-
-  "1.12":
-    <<: *test
-    docker:
-      - image: circleci/golang:1.12
-
-  "1.11":
-    <<: *test
-    docker:
-      - image: circleci/golang:1.11
-
-  "1.10":
-    <<: *test
-    docker:
-      - image: circleci/golang:1.10
-
-  "1.9":
-    <<: *test
-    docker:
-      - image: circleci/golang:1.9
-
-  "1.8":
-    <<: *test
-    docker:
-      - image: circleci/golang:1.8
-
-  "1.7":
-    <<: *test
-    docker:
-      - image: circleci/golang:1.7
+      - run:
+          name: "Run go test (+ race detector)"
+          command: >
+            go test -v -race ./...
 
 workflows:
-  version: 2
-  build:
+  tests:
     jobs:
-      - "latest"
-      - "1.12"
-      - "1.11"
-      - "1.10"
-      - "1.9"
-      - "1.8"
-      - "1.7"
+      - test:
+          matrix:
+            parameters:
+              version: ["latest", "1.15", "1.14", "1.13", "1.12", "1.11"]

middleware.go

@@ -58,22 +58,17 @@ func CORSMethodMiddleware(r *Router) MiddlewareFunc {
 func getAllMethodsForRoute(r *Router, req *http.Request) ([]string, error) {
 	var allMethods []string
 
-	err := r.Walk(func(route *Route, _ *Router, _ []*Route) error {
-		for _, m := range route.matchers {
-			if _, ok := m.(*routeRegexp); ok {
-				if m.Match(req, &RouteMatch{}) {
-					methods, err := route.GetMethods()
-					if err != nil {
-						return err
-					}
-
-					allMethods = append(allMethods, methods...)
-				}
-				break
+	for _, route := range r.routes {
+		var match RouteMatch
+		if route.Match(req, &match) || match.MatchErr == ErrMethodMismatch {
+			methods, err := route.GetMethods()
+			if err != nil {
+				return nil, err
 			}
+
+			allMethods = append(allMethods, methods...)
 		}
-		return nil
-	})
+	}
 
-	return allMethods, err
+	return allMethods, nil
 }

middleware_test.go

@@ -478,6 +478,26 @@ func TestCORSMethodMiddleware(t *testing.T) {
 	}
 }
 
+func TestCORSMethodMiddlewareSubrouter(t *testing.T) {
+	router := NewRouter().StrictSlash(true)
+
+	subrouter := router.PathPrefix("/test").Subrouter()
+	subrouter.HandleFunc("/hello", stringHandler("a")).Methods(http.MethodGet, http.MethodOptions, http.MethodPost)
+	subrouter.HandleFunc("/hello/{name}", stringHandler("b")).Methods(http.MethodGet, http.MethodOptions)
+
+	subrouter.Use(CORSMethodMiddleware(subrouter))
+
+	rw := NewRecorder()
+	req := newRequest("GET", "/test/hello/asdf")
+	router.ServeHTTP(rw, req)
+
+	actualMethods := rw.Header().Get("Access-Control-Allow-Methods")
+	expectedMethods := "GET,OPTIONS"
+	if actualMethods != expectedMethods {
+		t.Fatalf("expected methods %q but got: %q", expectedMethods, actualMethods)
+	}
+}
+
 func TestMiddlewareOnMultiSubrouter(t *testing.T) {
 	first := "first"
 	second := "second"

mux.go

@@ -5,6 +5,7 @@
 package mux
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"net/http"
@@ -58,8 +59,7 @@ type Router struct {
 
 	// If true, do not clear the request context after handling the request.
 	//
-	// Deprecated: No effect when go1.7+ is used, since the context is stored
-	// on the request itself.
+	// Deprecated: No effect, since the context is stored on the request itself.
 	KeepContext bool
 
 	// Slice of middlewares to be called after a match is found
@@ -195,8 +195,8 @@ func (r *Router) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 	var handler http.Handler
 	if r.Match(req, &match) {
 		handler = match.Handler
-		req = setVars(req, match.Vars)
-		req = setCurrentRoute(req, match.Route)
+		req = requestWithVars(req, match.Vars)
+		req = requestWithRoute(req, match.Route)
 	}
 
 	if handler == nil && match.MatchErr == ErrMethodMismatch {
@@ -426,7 +426,7 @@ const (
 
 // Vars returns the route variables for the current request, if any.
 func Vars(r *http.Request) map[string]string {
-	if rv := contextGet(r, varsKey); rv != nil {
+	if rv := r.Context().Value(varsKey); rv != nil {
 		return rv.(map[string]string)
 	}
 	return nil
@@ -435,21 +435,22 @@ func Vars(r *http.Request) map[string]string {
 // CurrentRoute returns the matched route for the current request, if any.
 // This only works when called inside the handler of the matched route
 // because the matched route is stored in the request context which is cleared
-// after the handler returns, unless the KeepContext option is set on the
-// Router.
+// after the handler returns.
 func CurrentRoute(r *http.Request) *Route {
-	if rv := contextGet(r, routeKey); rv != nil {
+	if rv := r.Context().Value(routeKey); rv != nil {
 		return rv.(*Route)
 	}
 	return nil
 }
 
-func setVars(r *http.Request, val interface{}) *http.Request {
-	return contextSet(r, varsKey, val)
+func requestWithVars(r *http.Request, vars map[string]string) *http.Request {
+	ctx := context.WithValue(r.Context(), varsKey, vars)
+	return r.WithContext(ctx)
 }
 
-func setCurrentRoute(r *http.Request, val interface{}) *http.Request {
-	return contextSet(r, routeKey, val)
+func requestWithRoute(r *http.Request, route *Route) *http.Request {
+	ctx := context.WithValue(r.Context(), routeKey, route)
+	return r.WithContext(ctx)
 }
 
 // ----------------------------------------------------------------------------

mux_httpserver_test.go

@@ -0,0 +1,49 @@
+// +build go1.9
+
+package mux
+
+import (
+	"bytes"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestSchemeMatchers(t *testing.T) {
+	router := NewRouter()
+	router.HandleFunc("/", func(rw http.ResponseWriter, r *http.Request) {
+		rw.Write([]byte("hello http world"))
+	}).Schemes("http")
+	router.HandleFunc("/", func(rw http.ResponseWriter, r *http.Request) {
+		rw.Write([]byte("hello https world"))
+	}).Schemes("https")
+
+	assertResponseBody := func(t *testing.T, s *httptest.Server, expectedBody string) {
+		resp, err := s.Client().Get(s.URL)
+		if err != nil {
+			t.Fatalf("unexpected error getting from server: %v", err)
+		}
+		if resp.StatusCode != 200 {
+			t.Fatalf("expected a status code of 200, got %v", resp.StatusCode)
+		}
+		body, err := ioutil.ReadAll(resp.Body)
+		if err != nil {
+			t.Fatalf("unexpected error reading body: %v", err)
+		}
+		if !bytes.Equal(body, []byte(expectedBody)) {
+			t.Fatalf("response should be hello world, was: %q", string(body))
+		}
+	}
+
+	t.Run("httpServer", func(t *testing.T) {
+		s := httptest.NewServer(router)
+		defer s.Close()
+		assertResponseBody(t, s, "hello http world")
+	})
+	t.Run("httpsServer", func(t *testing.T) {
+		s := httptest.NewTLSServer(router)
+		defer s.Close()
+		assertResponseBody(t, s, "hello https world")
+	})
+}