Use Gorilla middleware (refactoring)

12 files changed, 1071 insertions, 83 deletions

diff --git a/vendor/github.com/gorilla/mux/ISSUE_TEMPLATE.md b/vendor/github.com/gorilla/mux/ISSUE_TEMPLATE.md
new file mode 100644
index 0000000..232be82
--- /dev/null
+++ b/vendor/github.com/gorilla/mux/ISSUE_TEMPLATE.md
@@ -0,0 +1,11 @@
+**What version of Go are you running?** (Paste the output of `go version`)
+
+
+**What version of gorilla/mux are you at?** (Paste the output of `git rev-parse HEAD` inside `$GOPATH/src/github.com/gorilla/mux`)
+
+
+**Describe your problem** (and what you have tried so far)
+
+
+**Paste a minimal, runnable, reproduction of your issue below** (use backticks to format it)
+
diff --git a/vendor/github.com/gorilla/mux/README.md b/vendor/github.com/gorilla/mux/README.md
index 67a79e0..f9b3103 100644
--- a/vendor/github.com/gorilla/mux/README.md
+++ b/vendor/github.com/gorilla/mux/README.md
@@ -27,6 +27,8 @@ The name mux stands for "HTTP request multiplexer". Like the standard `http.Serv
 * [Static Files](#static-files)
 * [Registered URLs](#registered-urls)
 * [Walking Routes](#walking-routes)
+* [Graceful Shutdown](#graceful-shutdown)
+* [Middleware](#middleware)
 * [Full Example](#full-example)
 
 ---
@@ -45,11 +47,11 @@ Let's start registering a couple of URL paths and handlers:
 
 ```go
 func main() {
-	r := mux.NewRouter()
-	r.HandleFunc("/", HomeHandler)
-	r.HandleFunc("/products", ProductsHandler)
-	r.HandleFunc("/articles", ArticlesHandler)
-	http.Handle("/", r)
+    r := mux.NewRouter()
+    r.HandleFunc("/", HomeHandler)
+    r.HandleFunc("/products", ProductsHandler)
+    r.HandleFunc("/articles", ArticlesHandler)
+    http.Handle("/", r)
 }
 ```
 
@@ -68,9 +70,9 @@ The names are used to create a map of route variables which can be retrieved cal
 
 ```go
 func ArticlesCategoryHandler(w http.ResponseWriter, r *http.Request) {
-	vars := mux.Vars(r)
-	w.WriteHeader(http.StatusOK)
-	fmt.Fprintf(w, "Category: %v\n", vars["category"])
+    vars := mux.Vars(r)
+    w.WriteHeader(http.StatusOK)
+    fmt.Fprintf(w, "Category: %v\n", vars["category"])
 }
 ```
 
@@ -122,7 +124,7 @@ r.Queries("key", "value")
 
 ```go
 r.MatcherFunc(func(r *http.Request, rm *RouteMatch) bool {
-	return r.ProtoMajor == 0
+    return r.ProtoMajor == 0
 })
 ```
 
@@ -243,24 +245,24 @@ request that matches "/static/*". This makes it easy to serve static files with
 
 ```go
 func main() {
-	var dir string
+    var dir string
 
-	flag.StringVar(&dir, "dir", ".", "the directory to serve files from. Defaults to the current dir")
-	flag.Parse()
-	r := mux.NewRouter()
+    flag.StringVar(&dir, "dir", ".", "the directory to serve files from. Defaults to the current dir")
+    flag.Parse()
+    r := mux.NewRouter()
 
-	// This will serve files under http://localhost:8000/static/<filename>
-	r.PathPrefix("/static/").Handler(http.StripPrefix("/static/", http.FileServer(http.Dir(dir))))
+    // This will serve files under http://localhost:8000/static/<filename>
+    r.PathPrefix("/static/").Handler(http.StripPrefix("/static/", http.FileServer(http.Dir(dir))))
 
-	srv := &http.Server{
-		Handler:      r,
-		Addr:         "127.0.0.1:8000",
-		// Good practice: enforce timeouts for servers you create!
-		WriteTimeout: 15 * time.Second,
-		ReadTimeout:  15 * time.Second,
-	}
+    srv := &http.Server{
+        Handler:      r,
+        Addr:         "127.0.0.1:8000",
+        // Good practice: enforce timeouts for servers you create!
+        WriteTimeout: 15 * time.Second,
+        ReadTimeout:  15 * time.Second,
+    }
 
-	log.Fatal(srv.ListenAndServe())
+    log.Fatal(srv.ListenAndServe())
 }
 ```
 
@@ -383,6 +385,149 @@ r.Walk(func(route *mux.Route, router *mux.Router, ancestors []*mux.Route) error
 })
 ```
 
+### Graceful Shutdown
+
+Go 1.8 introduced the ability to [gracefully shutdown](https://golang.org/doc/go1.8#http_shutdown) a `*http.Server`. Here's how to do that alongside `mux`:
+
+```go
+package main
+
+import (
+    "context"
+    "flag"
+    "log"
+    "net/http"
+    "os"
+    "os/signal"
+
+    "github.com/gorilla/mux"
+)
+
+func main() {
+    var wait time.Duration
+    flag.DurationVar(&wait, "graceful-timeout", time.Second * 15, "the duration for which the server gracefully wait for existing connections to finish - e.g. 15s or 1m")
+    flag.Parse()
+
+    r := mux.NewRouter()
+    // Add your routes as needed
+    
+    srv := &http.Server{
+        Addr:         "0.0.0.0:8080",
+        // Good practice to set timeouts to avoid Slowloris attacks.
+        WriteTimeout: time.Second * 15,
+        ReadTimeout:  time.Second * 15,
+        IdleTimeout:  time.Second * 60,
+        Handler: r, // Pass our instance of gorilla/mux in.
+    }
+
+    // Run our server in a goroutine so that it doesn't block.
+    go func() {
+        if err := srv.ListenAndServe(); err != nil {
+            log.Println(err)
+        }
+    }()
+    
+    c := make(chan os.Signal, 1)
+    // We'll accept graceful shutdowns when quit via SIGINT (Ctrl+C)
+    // SIGKILL, SIGQUIT or SIGTERM (Ctrl+/) will not be caught.
+    signal.Notify(c, os.Interrupt)
+
+    // Block until we receive our signal.
+    <-c
+
+    // Create a deadline to wait for.
+    ctx, cancel := context.WithTimeout(ctx, wait)
+    // Doesn't block if no connections, but will otherwise wait
+    // until the timeout deadline.
+    srv.Shutdown(ctx)
+    // Optionally, you could run srv.Shutdown in a goroutine and block on
+    // <-ctx.Done() if your application should wait for other services
+    // to finalize based on context cancellation.
+    log.Println("shutting down")
+    os.Exit(0)
+}
+```
+
+### Middleware
+
+Mux supports the addition of middlewares to a [Router](https://godoc.org/github.com/gorilla/mux#Router), which are executed in the order they are added if a match is found, including its subrouters.
+Middlewares are (typically) small pieces of code which take one request, do something with it, and pass it down to another middleware or the final handler. Some common use cases for middleware are request logging, header manipulation, or `ResponseWriter` hijacking.
+
+Mux middlewares are defined using the de facto standard type:
+
+```go
+type MiddlewareFunc func(http.Handler) http.Handler
+```
+
+Typically, the returned handler is a closure which does something with the http.ResponseWriter and http.Request passed to it, and then calls the handler passed as parameter to the MiddlewareFunc. This takes advantage of closures being able access variables from the context where they are created, while retaining the signature enforced by the receivers.
+
+A very basic middleware which logs the URI of the request being handled could be written as:
+
+```go
+func simpleMw(next http.Handler) http.Handler {
+    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+        // Do stuff here
+        log.Println(r.RequestURI)
+        // Call the next handler, which can be another middleware in the chain, or the final handler.
+        next.ServeHTTP(w, r)
+    })
+}
+```
+
+Middlewares can be added to a router using `Router.AddMiddlewareFunc()`:
+
+```go
+r := mux.NewRouter()
+r.HandleFunc("/", handler)
+r.AddMiddleware(simpleMw)
+```
+
+A more complex authentication middleware, which maps session token to users, could be written as:
+
+```go
+// Define our struct
+type authenticationMiddleware struct {
+	tokenUsers map[string]string
+}
+
+// Initialize it somewhere
+func (amw *authenticationMiddleware) Populate() {
+	amw.tokenUsers["00000000"] = "user0"
+	amw.tokenUsers["aaaaaaaa"] = "userA"
+	amw.tokenUsers["05f717e5"] = "randomUser"
+	amw.tokenUsers["deadbeef"] = "user0"
+}
+
+// Middleware function, which will be called for each request
+func (amw *authenticationMiddleware) Middleware(next http.Handler) http.Handler {
+    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+        token := r.Header.Get("X-Session-Token")
+        
+        if user, found := amw.tokenUsers[token]; found {
+        	// We found the token in our map
+        	log.Printf("Authenticated user %s\n", user)
+        	// Pass down the request to the next middleware (or final handler)
+        	next.ServeHTTP(w, r)
+        } else {
+        	// Write an error and stop the handler chain
+        	http.Error(w, "Forbidden", 403)
+        }
+    })
+}
+```
+
+```go
+r := mux.NewRouter()
+r.HandleFunc("/", handler)
+
+amw := authenticationMiddleware{}
+amw.Populate()
+
+r.AddMiddlewareFunc(amw.Middleware)
+```
+
+Note: The handler chain will be stopped if your middleware doesn't call `next.ServeHTTP()` with the corresponding parameters. This can be used to abort a request if the middleware writer wants to. Middlewares *should* write to `ResponseWriter` if they *are* going to terminate the request, and they *should not* write to `ResponseWriter` if they *are not* going to terminate it.
+
 ## Full Example
 
 Here's a complete, runnable example of a small `mux` based server:
@@ -391,22 +536,22 @@ Here's a complete, runnable example of a small `mux` based server:
 package main
 
 import (
-	"net/http"
-	"log"
-	"github.com/gorilla/mux"
+    "net/http"
+    "log"
+    "github.com/gorilla/mux"
 )
 
 func YourHandler(w http.ResponseWriter, r *http.Request) {
-	w.Write([]byte("Gorilla!\n"))
+    w.Write([]byte("Gorilla!\n"))
 }
 
 func main() {
-	r := mux.NewRouter()
-	// Routes consist of a path and a handler function.
-	r.HandleFunc("/", YourHandler)
+    r := mux.NewRouter()
+    // Routes consist of a path and a handler function.
+    r.HandleFunc("/", YourHandler)
 
-	// Bind to a port and pass our router in
-	log.Fatal(http.ListenAndServe(":8000", r))
+    // Bind to a port and pass our router in
+    log.Fatal(http.ListenAndServe(":8000", r))
 }
 ```
 
diff --git a/vendor/github.com/gorilla/mux/doc.go b/vendor/github.com/gorilla/mux/doc.go
index cce30b2..013f088 100644
--- a/vendor/github.com/gorilla/mux/doc.go
+++ b/vendor/github.com/gorilla/mux/doc.go
@@ -238,5 +238,70 @@ as well:
 	url, err := r.Get("article").URL("subdomain", "news",
 	                                 "category", "technology",
 	                                 "id", "42")
+
+Since **vX.Y.Z**, mux supports the addition of middlewares to a [Router](https://godoc.org/github.com/gorilla/mux#Router), which are executed if a
+match is found (including subrouters). Middlewares are defined using the de facto standard type:
+
+	type MiddlewareFunc func(http.Handler) http.Handler
+
+Typically, the returned handler is a closure which does something with the http.ResponseWriter and http.Request passed to it, and then calls the handler passed as parameter to the MiddlewareFunc (closures can access variables from the context where they are created).
+
+A very basic middleware which logs the URI of the request being handled could be written as:
+
+	func simpleMw(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			// Do stuff here
+			log.Println(r.RequestURI)
+			// Call the next handler, which can be another middleware in the chain, or the final handler.
+			next.ServeHTTP(w, r)
+		})
+	}
+
+Middlewares can be added to a router using `Router.Use()`:
+
+	r := mux.NewRouter()
+	r.HandleFunc("/", handler)
+	r.AddMiddleware(simpleMw)
+
+A more complex authentication middleware, which maps session token to users, could be written as:
+
+	// Define our struct
+	type authenticationMiddleware struct {
+		tokenUsers map[string]string
+	}
+
+	// Initialize it somewhere
+	func (amw *authenticationMiddleware) Populate() {
+		amw.tokenUsers["00000000"] = "user0"
+		amw.tokenUsers["aaaaaaaa"] = "userA"
+		amw.tokenUsers["05f717e5"] = "randomUser"
+		amw.tokenUsers["deadbeef"] = "user0"
+	}
+
+	// Middleware function, which will be called for each request
+	func (amw *authenticationMiddleware) Middleware(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			token := r.Header.Get("X-Session-Token")
+
+			if user, found := amw.tokenUsers[token]; found {
+				// We found the token in our map
+				log.Printf("Authenticated user %s\n", user)
+				next.ServeHTTP(w, r)
+			} else {
+				http.Error(w, "Forbidden", 403)
+			}
+		})
+	}
+
+	r := mux.NewRouter()
+	r.HandleFunc("/", handler)
+
+	amw := authenticationMiddleware{}
+	amw.Populate()
+
+	r.Use(amw.Middleware)
+
+Note: The handler chain will be stopped if your middleware doesn't call `next.ServeHTTP()` with the corresponding parameters. This can be used to abort a request if the middleware writer wants to.
+
 */
 package mux
diff --git a/vendor/github.com/gorilla/mux/example_route_test.go b/vendor/github.com/gorilla/mux/example_route_test.go
new file mode 100644
index 0000000..1125570
--- /dev/null
+++ b/vendor/github.com/gorilla/mux/example_route_test.go
@@ -0,0 +1,51 @@
+package mux_test
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/gorilla/mux"
+)
+
+// This example demonstrates setting a regular expression matcher for
+// the header value. A plain word will match any value that contains a
+// matching substring as if the pattern was wrapped with `.*`.
+func ExampleRoute_HeadersRegexp() {
+	r := mux.NewRouter()
+	route := r.NewRoute().HeadersRegexp("Accept", "html")
+
+	req1, _ := http.NewRequest("GET", "example.com", nil)
+	req1.Header.Add("Accept", "text/plain")
+	req1.Header.Add("Accept", "text/html")
+
+	req2, _ := http.NewRequest("GET", "example.com", nil)
+	req2.Header.Set("Accept", "application/xhtml+xml")
+
+	matchInfo := &mux.RouteMatch{}
+	fmt.Printf("Match: %v %q\n", route.Match(req1, matchInfo), req1.Header["Accept"])
+	fmt.Printf("Match: %v %q\n", route.Match(req2, matchInfo), req2.Header["Accept"])
+	// Output:
+	// Match: true ["text/plain" "text/html"]
+	// Match: true ["application/xhtml+xml"]
+}
+
+// This example demonstrates setting a strict regular expression matcher
+// for the header value. Using the start and end of string anchors, the
+// value must be an exact match.
+func ExampleRoute_HeadersRegexp_exactMatch() {
+	r := mux.NewRouter()
+	route := r.NewRoute().HeadersRegexp("Origin", "^https://example.co$")
+
+	yes, _ := http.NewRequest("GET", "example.co", nil)
+	yes.Header.Set("Origin", "https://example.co")
+
+	no, _ := http.NewRequest("GET", "example.co.uk", nil)
+	no.Header.Set("Origin", "https://example.co.uk")
+
+	matchInfo := &mux.RouteMatch{}
+	fmt.Printf("Match: %v %q\n", route.Match(yes, matchInfo), yes.Header["Origin"])
+	fmt.Printf("Match: %v %q\n", route.Match(no, matchInfo), no.Header["Origin"])
+	// Output:
+	// Match: true ["https://example.co"]
+	// Match: false ["https://example.co.uk"]
+}
diff --git a/vendor/github.com/gorilla/mux/middleware.go b/vendor/github.com/gorilla/mux/middleware.go
new file mode 100644
index 0000000..8f89867
--- /dev/null
+++ b/vendor/github.com/gorilla/mux/middleware.go
@@ -0,0 +1,28 @@
+package mux
+
+import "net/http"
+
+// MiddlewareFunc is a function which receives an http.Handler and returns another http.Handler.
+// Typically, the returned handler is a closure which does something with the http.ResponseWriter and http.Request passed
+// to it, and then calls the handler passed as parameter to the MiddlewareFunc.
+type MiddlewareFunc func(http.Handler) http.Handler
+
+// middleware interface is anything which implements a MiddlewareFunc named Middleware.
+type middleware interface {
+	Middleware(handler http.Handler) http.Handler
+}
+
+// MiddlewareFunc also implements the middleware interface.
+func (mw MiddlewareFunc) Middleware(handler http.Handler) http.Handler {
+	return mw(handler)
+}
+
+// Use appends a MiddlewareFunc to the chain. Middleware can be used to intercept or otherwise modify requests and/or responses, and are executed in the order that they are applied to the Router.
+func (r *Router) Use(mwf MiddlewareFunc) {
+	r.middlewares = append(r.middlewares, mwf)
+}
+
+// useInterface appends a middleware to the chain. Middleware can be used to intercept or otherwise modify requests and/or responses, and are executed in the order that they are applied to the Router.
+func (r *Router) useInterface(mw middleware) {
+	r.middlewares = append(r.middlewares, mw)
+}
diff --git a/vendor/github.com/gorilla/mux/middleware_test.go b/vendor/github.com/gorilla/mux/middleware_test.go
new file mode 100644
index 0000000..93947e8
--- /dev/null
+++ b/vendor/github.com/gorilla/mux/middleware_test.go
@@ -0,0 +1,336 @@
+package mux
+
+import (
+	"bytes"
+	"net/http"
+	"testing"
+)
+
+type testMiddleware struct {
+	timesCalled uint
+}
+
+func (tm *testMiddleware) Middleware(h http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		tm.timesCalled++
+		h.ServeHTTP(w, r)
+	})
+}
+
+func dummyHandler(w http.ResponseWriter, r *http.Request) {}
+
+func TestMiddlewareAdd(t *testing.T) {
+	router := NewRouter()
+	router.HandleFunc("/", dummyHandler).Methods("GET")
+
+	mw := &testMiddleware{}
+
+	router.useInterface(mw)
+	if len(router.middlewares) != 1 || router.middlewares[0] != mw {
+		t.Fatal("Middleware was not added correctly")
+	}
+
+	router.Use(mw.Middleware)
+	if len(router.middlewares) != 2 {
+		t.Fatal("MiddlewareFunc method was not added correctly")
+	}
+
+	banalMw := func(handler http.Handler) http.Handler {
+		return handler
+	}
+	router.Use(banalMw)
+	if len(router.middlewares) != 3 {
+		t.Fatal("MiddlewareFunc method was not added correctly")
+	}
+}
+
+func TestMiddleware(t *testing.T) {
+	router := NewRouter()
+	router.HandleFunc("/", dummyHandler).Methods("GET")
+
+	mw := &testMiddleware{}
+	router.useInterface(mw)
+
+	rw := NewRecorder()
+	req := newRequest("GET", "/")
+
+	// Test regular middleware call
+	router.ServeHTTP(rw, req)
+	if mw.timesCalled != 1 {
+		t.Fatalf("Expected %d calls, but got only %d", 1, mw.timesCalled)
+	}
+
+	// Middleware should not be called for 404
+	req = newRequest("GET", "/not/found")
+	router.ServeHTTP(rw, req)
+	if mw.timesCalled != 1 {
+		t.Fatalf("Expected %d calls, but got only %d", 1, mw.timesCalled)
+	}
+
+	// Middleware should not be called if there is a method mismatch
+	req = newRequest("POST", "/")
+	router.ServeHTTP(rw, req)
+	if mw.timesCalled != 1 {
+		t.Fatalf("Expected %d calls, but got only %d", 1, mw.timesCalled)
+	}
+
+	// Add the middleware again as function
+	router.Use(mw.Middleware)
+	req = newRequest("GET", "/")
+	router.ServeHTTP(rw, req)
+	if mw.timesCalled != 3 {
+		t.Fatalf("Expected %d calls, but got only %d", 3, mw.timesCalled)
+	}
+
+}
+
+func TestMiddlewareSubrouter(t *testing.T) {
+	router := NewRouter()
+	router.HandleFunc("/", dummyHandler).Methods("GET")
+
+	subrouter := router.PathPrefix("/sub").Subrouter()
+	subrouter.HandleFunc("/x", dummyHandler).Methods("GET")
+
+	mw := &testMiddleware{}
+	subrouter.useInterface(mw)
+
+	rw := NewRecorder()
+	req := newRequest("GET", "/")
+
+	router.ServeHTTP(rw, req)
+	if mw.timesCalled != 0 {
+		t.Fatalf("Expected %d calls, but got only %d", 0, mw.timesCalled)
+	}
+
+	req = newRequest("GET", "/sub/")
+	router.ServeHTTP(rw, req)
+	if mw.timesCalled != 0 {
+		t.Fatalf("Expected %d calls, but got only %d", 0, mw.timesCalled)
+	}
+
+	req = newRequest("GET", "/sub/x")
+	router.ServeHTTP(rw, req)
+	if mw.timesCalled != 1 {
+		t.Fatalf("Expected %d calls, but got only %d", 1, mw.timesCalled)
+	}
+
+	req = newRequest("GET", "/sub/not/found")
+	router.ServeHTTP(rw, req)
+	if mw.timesCalled != 1 {
+		t.Fatalf("Expected %d calls, but got only %d", 1, mw.timesCalled)
+	}
+
+	router.useInterface(mw)
+
+	req = newRequest("GET", "/")
+	router.ServeHTTP(rw, req)
+	if mw.timesCalled != 2 {
+		t.Fatalf("Expected %d calls, but got only %d", 2, mw.timesCalled)
+	}
+
+	req = newRequest("GET", "/sub/x")
+	router.ServeHTTP(rw, req)
+	if mw.timesCalled != 4 {
+		t.Fatalf("Expected %d calls, but got only %d", 4, mw.timesCalled)
+	}
+}
+
+func TestMiddlewareExecution(t *testing.T) {
+	mwStr := []byte("Middleware\n")
+	handlerStr := []byte("Logic\n")
+
+	router := NewRouter()
+	router.HandleFunc("/", func(w http.ResponseWriter, e *http.Request) {
+		w.Write(handlerStr)
+	})
+
+	rw := NewRecorder()
+	req := newRequest("GET", "/")
+
+	// Test handler-only call
+	router.ServeHTTP(rw, req)
+
+	if bytes.Compare(rw.Body.Bytes(), handlerStr) != 0 {
+		t.Fatal("Handler response is not what it should be")
+	}
+
+	// Test middleware call
+	rw = NewRecorder()
+
+	router.Use(func(h http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.Write(mwStr)
+			h.ServeHTTP(w, r)
+		})
+	})
+
+	router.ServeHTTP(rw, req)
+	if bytes.Compare(rw.Body.Bytes(), append(mwStr, handlerStr...)) != 0 {
+		t.Fatal("Middleware + handler response is not what it should be")
+	}
+}
+
+func TestMiddlewareNotFound(t *testing.T) {
+	mwStr := []byte("Middleware\n")
+	handlerStr := []byte("Logic\n")
+
+	router := NewRouter()
+	router.HandleFunc("/", func(w http.ResponseWriter, e *http.Request) {
+		w.Write(handlerStr)
+	})
+	router.Use(func(h http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.Write(mwStr)
+			h.ServeHTTP(w, r)
+		})
+	})
+
+	// Test not found call with default handler
+	rw := NewRecorder()
+	req := newRequest("GET", "/notfound")
+
+	router.ServeHTTP(rw, req)
+	if bytes.Contains(rw.Body.Bytes(), mwStr) {
+		t.Fatal("Middleware was called for a 404")
+	}
+
+	// Test not found call with custom handler
+	rw = NewRecorder()
+	req = newRequest("GET", "/notfound")
+
+	router.NotFoundHandler = http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
+		rw.Write([]byte("Custom 404 handler"))
+	})
+	router.ServeHTTP(rw, req)
+
+	if bytes.Contains(rw.Body.Bytes(), mwStr) {
+		t.Fatal("Middleware was called for a custom 404")
+	}
+}
+
+func TestMiddlewareMethodMismatch(t *testing.T) {
+	mwStr := []byte("Middleware\n")
+	handlerStr := []byte("Logic\n")
+
+	router := NewRouter()
+	router.HandleFunc("/", func(w http.ResponseWriter, e *http.Request) {
+		w.Write(handlerStr)
+	}).Methods("GET")
+
+	router.Use(func(h http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.Write(mwStr)
+			h.ServeHTTP(w, r)
+		})
+	})
+
+	// Test method mismatch
+	rw := NewRecorder()
+	req := newRequest("POST", "/")
+
+	router.ServeHTTP(rw, req)
+	if bytes.Contains(rw.Body.Bytes(), mwStr) {
+		t.Fatal("Middleware was called for a method mismatch")
+	}
+
+	// Test not found call
+	rw = NewRecorder()
+	req = newRequest("POST", "/")
+
+	router.MethodNotAllowedHandler = http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
+		rw.Write([]byte("Method not allowed"))
+	})
+	router.ServeHTTP(rw, req)
+
+	if bytes.Contains(rw.Body.Bytes(), mwStr) {
+		t.Fatal("Middleware was called for a method mismatch")
+	}
+}
+
+func TestMiddlewareNotFoundSubrouter(t *testing.T) {
+	mwStr := []byte("Middleware\n")
+	handlerStr := []byte("Logic\n")
+
+	router := NewRouter()
+	router.HandleFunc("/", func(w http.ResponseWriter, e *http.Request) {
+		w.Write(handlerStr)
+	})
+
+	subrouter := router.PathPrefix("/sub/").Subrouter()
+	subrouter.HandleFunc("/", func(w http.ResponseWriter, e *http.Request) {
+		w.Write(handlerStr)
+	})
+
+	router.Use(func(h http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.Write(mwStr)
+			h.ServeHTTP(w, r)
+		})
+	})
+
+	// Test not found call for default handler
+	rw := NewRecorder()
+	req := newRequest("GET", "/sub/notfound")
+
+	router.ServeHTTP(rw, req)
+	if bytes.Contains(rw.Body.Bytes(), mwStr) {
+		t.Fatal("Middleware was called for a 404")
+	}
+
+	// Test not found call with custom handler
+	rw = NewRecorder()
+	req = newRequest("GET", "/sub/notfound")
+
+	subrouter.NotFoundHandler = http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
+		rw.Write([]byte("Custom 404 handler"))
+	})
+	router.ServeHTTP(rw, req)
+
+	if bytes.Contains(rw.Body.Bytes(), mwStr) {
+		t.Fatal("Middleware was called for a custom 404")
+	}
+}
+
+func TestMiddlewareMethodMismatchSubrouter(t *testing.T) {
+	mwStr := []byte("Middleware\n")
+	handlerStr := []byte("Logic\n")
+
+	router := NewRouter()
+	router.HandleFunc("/", func(w http.ResponseWriter, e *http.Request) {
+		w.Write(handlerStr)
+	})
+
+	subrouter := router.PathPrefix("/sub/").Subrouter()
+	subrouter.HandleFunc("/", func(w http.ResponseWriter, e *http.Request) {
+		w.Write(handlerStr)
+	}).Methods("GET")
+
+	router.Use(func(h http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.Write(mwStr)
+			h.ServeHTTP(w, r)
+		})
+	})
+
+	// Test method mismatch without custom handler
+	rw := NewRecorder()
+	req := newRequest("POST", "/sub/")
+
+	router.ServeHTTP(rw, req)
+	if bytes.Contains(rw.Body.Bytes(), mwStr) {
+		t.Fatal("Middleware was called for a method mismatch")
+	}
+
+	// Test method mismatch with custom handler
+	rw = NewRecorder()
+	req = newRequest("POST", "/sub/")
+
+	router.MethodNotAllowedHandler = http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
+		rw.Write([]byte("Method not allowed"))
+	})
+	router.ServeHTTP(rw, req)
+
+	if bytes.Contains(rw.Body.Bytes(), mwStr) {
+		t.Fatal("Middleware was called for a method mismatch")
+	}
+}
diff --git a/vendor/github.com/gorilla/mux/mux.go b/vendor/github.com/gorilla/mux/mux.go
index 49de789..efabd24 100644
--- a/vendor/github.com/gorilla/mux/mux.go
+++ b/vendor/github.com/gorilla/mux/mux.go
@@ -63,6 +63,8 @@ type Router struct {
 	KeepContext bool
 	// see Router.UseEncodedPath(). This defines a flag for all routes.
 	useEncodedPath bool
+	// Slice of middlewares to be called after a match is found
+	middlewares []middleware
 }
 
 // Match attempts to match the given request against the router's registered routes.
@@ -79,6 +81,12 @@ type Router struct {
 func (r *Router) Match(req *http.Request, match *RouteMatch) bool {
 	for _, route := range r.routes {
 		if route.Match(req, match) {
+			// Build middleware chain if no error was found
+			if match.MatchErr == nil {
+				for i := len(r.middlewares) - 1; i >= 0; i-- {
+					match.Handler = r.middlewares[i].Middleware(match.Handler)
+				}
+			}
 			return true
 		}
 	}
@@ -147,6 +155,7 @@ func (r *Router) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 	if !r.KeepContext {
 		defer contextClear(req)
 	}
+
 	handler.ServeHTTP(w, req)
 }
 
@@ -164,13 +173,18 @@ func (r *Router) GetRoute(name string) *Route {
 // StrictSlash defines the trailing slash behavior for new routes. The initial
 // value is false.
 //
-// When true, if the route path is "/path/", accessing "/path" will redirect
+// When true, if the route path is "/path/", accessing "/path" will perform a redirect
 // to the former and vice versa. In other words, your application will always
 // see the path as specified in the route.
 //
 // When false, if the route path is "/path", accessing "/path/" will not match
 // this route and vice versa.
 //
+// The re-direct is a HTTP 301 (Moved Permanently). Note that when this is set for
+// routes with a non-idempotent method (e.g. POST, PUT), the subsequent re-directed
+// request will be made as a GET by most clients. Use middleware or client settings
+// to modify this behaviour as needed.
+//
 // Special case: when a route sets a path prefix using the PathPrefix() method,
 // strict slash is ignored for that route because the redirect behavior can't
 // be determined from a prefix alone. However, any subrouters created from that
@@ -196,10 +210,6 @@ func (r *Router) SkipClean(value bool) *Router {
 // UseEncodedPath tells the router to match the encoded original path
 // to the routes.
 // For eg. "/path/foo%2Fbar/to" will match the path "/path/{var}/to".
-// This behavior has the drawback of needing to match routes against
-// r.RequestURI instead of r.URL.Path. Any modifications (such as http.StripPrefix)
-// to r.URL.Path will not affect routing when this flag is on and thus may
-// induce unintended behavior.
 //
 // If not called, the router will match the unencoded path to the routes.
 // For eg. "/path/foo%2Fbar/to" will match the path "/path/foo/bar/to"
diff --git a/vendor/github.com/gorilla/mux/mux_test.go b/vendor/github.com/gorilla/mux/mux_test.go
index 6c7e30d..9e93c98 100644
--- a/vendor/github.com/gorilla/mux/mux_test.go
+++ b/vendor/github.com/gorilla/mux/mux_test.go
@@ -25,7 +25,7 @@ func (r *Route) GoString() string {
 }
 
 func (r *routeRegexp) GoString() string {
-	return fmt.Sprintf("&routeRegexp{template: %q, matchHost: %t, matchQuery: %t, strictSlash: %t, regexp: regexp.MustCompile(%q), reverse: %q, varsN: %v, varsR: %v", r.template, r.matchHost, r.matchQuery, r.strictSlash, r.regexp.String(), r.reverse, r.varsN, r.varsR)
+	return fmt.Sprintf("&routeRegexp{template: %q, regexpType: %v, options: %v, regexp: regexp.MustCompile(%q), reverse: %q, varsN: %v, varsR: %v", r.template, r.regexpType, r.options, r.regexp.String(), r.reverse, r.varsN, r.varsR)
 }
 
 type routeTest struct {
@@ -1967,6 +1967,318 @@ func TestErrMatchNotFound(t *testing.T) {
 	}
 }
 
+// methodsSubrouterTest models the data necessary for testing handler
+// matching for subrouters created after HTTP methods matcher registration.
+type methodsSubrouterTest struct {
+	title    string
+	wantCode int
+	router   *Router
+	// method is the input into the request and expected response
+	method string
+	// input request path
+	path string
+	// redirectTo is the expected location path for strict-slash matches
+	redirectTo string
+}
+
+// methodHandler writes the method string in response.
+func methodHandler(method string) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte(method))
+	}
+}
+
+// TestMethodsSubrouterCatchall matches handlers for subrouters where a
+// catchall handler is set for a mis-matching method.
+func TestMethodsSubrouterCatchall(t *testing.T) {
+	t.Parallel()
+
+	router := NewRouter()
+	router.Methods("PATCH").Subrouter().PathPrefix("/").HandlerFunc(methodHandler("PUT"))
+	router.Methods("GET").Subrouter().HandleFunc("/foo", methodHandler("GET"))
+	router.Methods("POST").Subrouter().HandleFunc("/foo", methodHandler("POST"))
+	router.Methods("DELETE").Subrouter().HandleFunc("/foo", methodHandler("DELETE"))
+
+	tests := []methodsSubrouterTest{
+		{
+			title:    "match GET handler",
+			router:   router,
+			path:     "http://localhost/foo",
+			method:   "GET",
+			wantCode: http.StatusOK,
+		},
+		{
+			title:    "match POST handler",
+			router:   router,
+			method:   "POST",
+			path:     "http://localhost/foo",
+			wantCode: http.StatusOK,
+		},
+		{
+			title:    "match DELETE handler",
+			router:   router,
+			method:   "DELETE",
+			path:     "http://localhost/foo",
+			wantCode: http.StatusOK,
+		},
+		{
+			title:    "disallow PUT method",
+			router:   router,
+			method:   "PUT",
+			path:     "http://localhost/foo",
+			wantCode: http.StatusMethodNotAllowed,
+		},
+	}
+
+	for _, test := range tests {
+		testMethodsSubrouter(t, test)
+	}
+}
+
+// TestMethodsSubrouterStrictSlash matches handlers on subrouters with
+// strict-slash matchers.
+func TestMethodsSubrouterStrictSlash(t *testing.T) {
+	t.Parallel()
+
+	router := NewRouter()
+	sub := router.PathPrefix("/").Subrouter()
+	sub.StrictSlash(true).Path("/foo").Methods("GET").Subrouter().HandleFunc("", methodHandler("GET"))
+	sub.StrictSlash(true).Path("/foo/").Methods("PUT").Subrouter().HandleFunc("/", methodHandler("PUT"))
+	sub.StrictSlash(true).Path("/foo/").Methods("POST").Subrouter().HandleFunc("/", methodHandler("POST"))
+
+	tests := []methodsSubrouterTest{
+		{
+			title:    "match POST handler",
+			router:   router,
+			method:   "POST",
+			path:     "http://localhost/foo/",
+			wantCode: http.StatusOK,
+		},
+		{
+			title:    "match GET handler",
+			router:   router,
+			method:   "GET",
+			path:     "http://localhost/foo",
+			wantCode: http.StatusOK,
+		},
+		{
+			title:      "match POST handler, redirect strict-slash",
+			router:     router,
+			method:     "POST",
+			path:       "http://localhost/foo",
+			redirectTo: "http://localhost/foo/",
+			wantCode:   http.StatusMovedPermanently,
+		},
+		{
+			title:      "match GET handler, redirect strict-slash",
+			router:     router,
+			method:     "GET",
+			path:       "http://localhost/foo/",
+			redirectTo: "http://localhost/foo",
+			wantCode:   http.StatusMovedPermanently,
+		},
+		{
+			title:    "disallow DELETE method",
+			router:   router,
+			method:   "DELETE",
+			path:     "http://localhost/foo",
+			wantCode: http.StatusMethodNotAllowed,
+		},
+	}
+
+	for _, test := range tests {
+		testMethodsSubrouter(t, test)
+	}
+}
+
+// TestMethodsSubrouterPathPrefix matches handlers on subrouters created
+// on a router with a path prefix matcher and method matcher.
+func TestMethodsSubrouterPathPrefix(t *testing.T) {
+	t.Parallel()
+
+	router := NewRouter()
+	router.PathPrefix("/1").Methods("POST").Subrouter().HandleFunc("/2", methodHandler("POST"))
+	router.PathPrefix("/1").Methods("DELETE").Subrouter().HandleFunc("/2", methodHandler("DELETE"))
+	router.PathPrefix("/1").Methods("PUT").Subrouter().HandleFunc("/2", methodHandler("PUT"))
+	router.PathPrefix("/1").Methods("POST").Subrouter().HandleFunc("/2", methodHandler("POST2"))
+
+	tests := []methodsSubrouterTest{
+		{
+			title:    "match first POST handler",
+			router:   router,
+			method:   "POST",
+			path:     "http://localhost/1/2",
+			wantCode: http.StatusOK,
+		},
+		{
+			title:    "match DELETE handler",
+			router:   router,
+			method:   "DELETE",
+			path:     "http://localhost/1/2",
+			wantCode: http.StatusOK,
+		},
+		{
+			title:    "match PUT handler",
+			router:   router,
+			method:   "PUT",
+			path:     "http://localhost/1/2",
+			wantCode: http.StatusOK,
+		},
+		{
+			title:    "disallow PATCH method",
+			router:   router,
+			method:   "PATCH",
+			path:     "http://localhost/1/2",
+			wantCode: http.StatusMethodNotAllowed,
+		},
+	}
+
+	for _, test := range tests {
+		testMethodsSubrouter(t, test)
+	}
+}
+
+// TestMethodsSubrouterSubrouter matches handlers on subrouters produced
+// from method matchers registered on a root subrouter.
+func TestMethodsSubrouterSubrouter(t *testing.T) {
+	t.Parallel()
+
+	router := NewRouter()
+	sub := router.PathPrefix("/1").Subrouter()
+	sub.Methods("POST").Subrouter().HandleFunc("/2", methodHandler("POST"))
+	sub.Methods("GET").Subrouter().HandleFunc("/2", methodHandler("GET"))
+	sub.Methods("PATCH").Subrouter().HandleFunc("/2", methodHandler("PATCH"))
+	sub.HandleFunc("/2", methodHandler("PUT")).Subrouter().Methods("PUT")
+	sub.HandleFunc("/2", methodHandler("POST2")).Subrouter().Methods("POST")
+
+	tests := []methodsSubrouterTest{
+		{
+			title:    "match first POST handler",
+			router:   router,
+			method:   "POST",
+			path:     "http://localhost/1/2",
+			wantCode: http.StatusOK,
+		},
+		{
+			title:    "match GET handler",
+			router:   router,
+			method:   "GET",
+			path:     "http://localhost/1/2",
+			wantCode: http.StatusOK,
+		},
+		{
+			title:    "match PATCH handler",
+			router:   router,
+			method:   "PATCH",
+			path:     "http://localhost/1/2",
+			wantCode: http.StatusOK,
+		},
+		{
+			title:    "match PUT handler",
+			router:   router,
+			method:   "PUT",
+			path:     "http://localhost/1/2",
+			wantCode: http.StatusOK,
+		},
+		{
+			title:    "disallow DELETE method",
+			router:   router,
+			method:   "DELETE",
+			path:     "http://localhost/1/2",
+			wantCode: http.StatusMethodNotAllowed,
+		},
+	}
+
+	for _, test := range tests {
+		testMethodsSubrouter(t, test)
+	}
+}
+
+// TestMethodsSubrouterPathVariable matches handlers on matching paths
+// with path variables in them.
+func TestMethodsSubrouterPathVariable(t *testing.T) {
+	t.Parallel()
+
+	router := NewRouter()
+	router.Methods("GET").Subrouter().HandleFunc("/foo", methodHandler("GET"))
+	router.Methods("POST").Subrouter().HandleFunc("/{any}", methodHandler("POST"))
+	router.Methods("DELETE").Subrouter().HandleFunc("/1/{any}", methodHandler("DELETE"))
+	router.Methods("PUT").Subrouter().HandleFunc("/1/{any}", methodHandler("PUT"))
+
+	tests := []methodsSubrouterTest{
+		{
+			title:    "match GET handler",
+			router:   router,
+			method:   "GET",
+			path:     "http://localhost/foo",
+			wantCode: http.StatusOK,
+		},
+		{
+			title:    "match POST handler",
+			router:   router,
+			method:   "POST",
+			path:     "http://localhost/foo",
+			wantCode: http.StatusOK,
+		},
+		{
+			title:    "match DELETE handler",
+			router:   router,
+			method:   "DELETE",
+			path:     "http://localhost/1/foo",
+			wantCode: http.StatusOK,
+		},
+		{
+			title:    "match PUT handler",
+			router:   router,
+			method:   "PUT",
+			path:     "http://localhost/1/foo",
+			wantCode: http.StatusOK,
+		},
+		{
+			title:    "disallow PATCH method",
+			router:   router,
+			method:   "PATCH",
+			path:     "http://localhost/1/foo",
+			wantCode: http.StatusMethodNotAllowed,
+		},
+	}
+
+	for _, test := range tests {
+		testMethodsSubrouter(t, test)
+	}
+}
+
+// testMethodsSubrouter runs an individual methodsSubrouterTest.
+func testMethodsSubrouter(t *testing.T, test methodsSubrouterTest) {
+	// Execute request
+	req, _ := http.NewRequest(test.method, test.path, nil)
+	resp := NewRecorder()
+	test.router.ServeHTTP(resp, req)
+
+	switch test.wantCode {
+	case http.StatusMethodNotAllowed:
+		if resp.Code != http.StatusMethodNotAllowed {
+			t.Errorf(`(%s) Expected "405 Method Not Allowed", but got %d code`, test.title, resp.Code)
+		} else if matchedMethod := resp.Body.String(); matchedMethod != "" {
+			t.Errorf(`(%s) Expected "405 Method Not Allowed", but %q handler was called`, test.title, matchedMethod)
+		}
+
+	case http.StatusMovedPermanently:
+		if gotLocation := resp.HeaderMap.Get("Location"); gotLocation != test.redirectTo {
+			t.Errorf("(%s) Expected %q route-match to redirect to %q, but got %q", test.title, test.method, test.redirectTo, gotLocation)
+		}
+
+	case http.StatusOK:
+		if matchedMethod := resp.Body.String(); matchedMethod != test.method {
+			t.Errorf("(%s) Expected %q handler to be called, but %q handler was called", test.title, test.method, matchedMethod)
+		}
+
+	default:
+		expectedCodes := []int{http.StatusMethodNotAllowed, http.StatusMovedPermanently, http.StatusOK}
+		t.Errorf("(%s) Expected wantCode to be one of: %v, but got %d", test.title, expectedCodes, test.wantCode)
+	}
+}
+
 // mapToPairs converts a string map to a slice of string pairs
 func mapToPairs(m map[string]string) []string {
 	var i int
diff --git a/vendor/github.com/gorilla/mux/old_test.go b/vendor/github.com/gorilla/mux/old_test.go
index 3751e47..b228983 100644
--- a/vendor/github.com/gorilla/mux/old_test.go
+++ b/vendor/github.com/gorilla/mux/old_test.go
@@ -681,7 +681,7 @@ func TestNewRegexp(t *testing.T) {
 	}
 
 	for pattern, paths := range tests {
-		p, _ = newRouteRegexp(pattern, false, false, false, false, false)
+		p, _ = newRouteRegexp(pattern, regexpTypePath, routeRegexpOptions{})
 		for path, result := range paths {
 			matches = p.regexp.FindStringSubmatch(path)
 			if result == nil {
diff --git a/vendor/github.com/gorilla/mux/regexp.go b/vendor/github.com/gorilla/mux/regexp.go
index e83213b..2b57e56 100644
--- a/vendor/github.com/gorilla/mux/regexp.go
+++ b/vendor/github.com/gorilla/mux/regexp.go
@@ -14,6 +14,20 @@ import (
 	"strings"
 )
 
+type routeRegexpOptions struct {
+	strictSlash    bool
+	useEncodedPath bool
+}
+
+type regexpType int
+
+const (
+	regexpTypePath   regexpType = 0
+	regexpTypeHost   regexpType = 1
+	regexpTypePrefix regexpType = 2
+	regexpTypeQuery  regexpType = 3
+)
+
 // newRouteRegexp parses a route template and returns a routeRegexp,
 // used to match a host, a path or a query string.
 //
@@ -24,7 +38,7 @@ import (
 // Previously we accepted only Python-like identifiers for variable
 // names ([a-zA-Z_][a-zA-Z0-9_]*), but currently the only restriction is that
 // name and pattern can't be empty, and names can't contain a colon.
-func newRouteRegexp(tpl string, matchHost, matchPrefix, matchQuery, strictSlash, useEncodedPath bool) (*routeRegexp, error) {
+func newRouteRegexp(tpl string, typ regexpType, options routeRegexpOptions) (*routeRegexp, error) {
 	// Check if it is well-formed.
 	idxs, errBraces := braceIndices(tpl)
 	if errBraces != nil {
@@ -34,19 +48,18 @@ func newRouteRegexp(tpl string, matchHost, matchPrefix, matchQuery, strictSlash,
 	template := tpl
 	// Now let's parse it.
 	defaultPattern := "[^/]+"
-	if matchQuery {
+	if typ == regexpTypeQuery {
 		defaultPattern = ".*"
-	} else if matchHost {
+	} else if typ == regexpTypeHost {
 		defaultPattern = "[^.]+"
-		matchPrefix = false
 	}
 	// Only match strict slash if not matching
-	if matchPrefix || matchHost || matchQuery {
-		strictSlash = false
+	if typ != regexpTypePath {
+		options.strictSlash = false
 	}
 	// Set a flag for strictSlash.
 	endSlash := false
-	if strictSlash && strings.HasSuffix(tpl, "/") {
+	if options.strictSlash && strings.HasSuffix(tpl, "/") {
 		tpl = tpl[:len(tpl)-1]
 		endSlash = true
 	}
@@ -88,16 +101,16 @@ func newRouteRegexp(tpl string, matchHost, matchPrefix, matchQuery, strictSlash,
 	// Add the remaining.
 	raw := tpl[end:]
 	pattern.WriteString(regexp.QuoteMeta(raw))
-	if strictSlash {
+	if options.strictSlash {
 		pattern.WriteString("[/]?")
 	}
-	if matchQuery {
+	if typ == regexpTypeQuery {
 		// Add the default pattern if the query value is empty
 		if queryVal := strings.SplitN(template, "=", 2)[1]; queryVal == "" {
 			pattern.WriteString(defaultPattern)
 		}
 	}
-	if !matchPrefix {
+	if typ != regexpTypePrefix {
 		pattern.WriteByte('$')
 	}
 	reverse.WriteString(raw)
@@ -118,15 +131,13 @@ func newRouteRegexp(tpl string, matchHost, matchPrefix, matchQuery, strictSlash,
 
 	// Done!
 	return &routeRegexp{
-		template:       template,
-		matchHost:      matchHost,
-		matchQuery:     matchQuery,
-		strictSlash:    strictSlash,
-		useEncodedPath: useEncodedPath,
-		regexp:         reg,
-		reverse:        reverse.String(),
-		varsN:          varsN,
-		varsR:          varsR,
+		template:   template,
+		regexpType: typ,
+		options:    options,
+		regexp:     reg,
+		reverse:    reverse.String(),
+		varsN:      varsN,
+		varsR:      varsR,
 	}, nil
 }
 
@@ -135,15 +146,10 @@ func newRouteRegexp(tpl string, matchHost, matchPrefix, matchQuery, strictSlash,
 type routeRegexp struct {
 	// The unmodified template.
 	template string
-	// True for host match, false for path or query string match.
-	matchHost bool
-	// True for query string match, false for path and host match.
-	matchQuery bool
-	// The strictSlash value defined on the route, but disabled if PathPrefix was used.
-	strictSlash bool
-	// Determines whether to use encoded req.URL.EnscapedPath() or unencoded
-	// req.URL.Path for path matching
-	useEncodedPath bool
+	// The type of match
+	regexpType regexpType
+	// Options for matching
+	options routeRegexpOptions
 	// Expanded regexp.
 	regexp *regexp.Regexp
 	// Reverse template.
@@ -156,12 +162,12 @@ type routeRegexp struct {
 
 // Match matches the regexp against the URL host or path.
 func (r *routeRegexp) Match(req *http.Request, match *RouteMatch) bool {
-	if !r.matchHost {
-		if r.matchQuery {
+	if r.regexpType != regexpTypeHost {
+		if r.regexpType == regexpTypeQuery {
 			return r.matchQueryString(req)
 		}
 		path := req.URL.Path
-		if r.useEncodedPath {
+		if r.options.useEncodedPath {
 			path = req.URL.EscapedPath()
 		}
 		return r.regexp.MatchString(path)
@@ -178,7 +184,7 @@ func (r *routeRegexp) url(values map[string]string) (string, error) {
 		if !ok {
 			return "", fmt.Errorf("mux: missing route variable %q", v)
 		}
-		if r.matchQuery {
+		if r.regexpType == regexpTypeQuery {
 			value = url.QueryEscape(value)
 		}
 		urlValues[k] = value
@@ -203,7 +209,7 @@ func (r *routeRegexp) url(values map[string]string) (string, error) {
 // For a URL with foo=bar&baz=ding, we return only the relevant key
 // value pair for the routeRegexp.
 func (r *routeRegexp) getURLQuery(req *http.Request) string {
-	if !r.matchQuery {
+	if r.regexpType != regexpTypeQuery {
 		return ""
 	}
 	templateKey := strings.SplitN(r.template, "=", 2)[0]
@@ -280,7 +286,7 @@ func (v *routeRegexpGroup) setMatch(req *http.Request, m *RouteMatch, r *Route)
 		if len(matches) > 0 {
 			extractVars(path, matches, v.path.varsN, m.Vars)
 			// Check if we should redirect.
-			if v.path.strictSlash {
+			if v.path.options.strictSlash {
 				p1 := strings.HasSuffix(path, "/")
 				p2 := strings.HasSuffix(v.path.template, "/")
 				if p1 != p2 {
diff --git a/vendor/github.com/gorilla/mux/route.go b/vendor/github.com/gorilla/mux/route.go
index 69aeae7..4ce098d 100644
--- a/vendor/github.com/gorilla/mux/route.go
+++ b/vendor/github.com/gorilla/mux/route.go
@@ -75,6 +75,8 @@ func (r *Route) Match(req *http.Request, match *RouteMatch) bool {
 	if match.MatchErr == ErrMethodMismatch {
 		// We found a route which matches request method, clear MatchErr
 		match.MatchErr = nil
+		// Then override the mis-matched handler
+		match.Handler = r.handler
 	}
 
 	// Yay, we have a match. Let's collect some info about it.
@@ -169,12 +171,12 @@ func (r *Route) addMatcher(m matcher) *Route {
 }
 
 // addRegexpMatcher adds a host or path matcher and builder to a route.
-func (r *Route) addRegexpMatcher(tpl string, matchHost, matchPrefix, matchQuery bool) error {
+func (r *Route) addRegexpMatcher(tpl string, typ regexpType) error {
 	if r.err != nil {
 		return r.err
 	}
 	r.regexp = r.getRegexpGroup()
-	if !matchHost && !matchQuery {
+	if typ == regexpTypePath || typ == regexpTypePrefix {
 		if len(tpl) > 0 && tpl[0] != '/' {
 			return fmt.Errorf("mux: path must start with a slash, got %q", tpl)
 		}
@@ -182,7 +184,10 @@ func (r *Route) addRegexpMatcher(tpl string, matchHost, matchPrefix, matchQuery
 			tpl = strings.TrimRight(r.regexp.path.template, "/") + tpl
 		}
 	}
-	rr, err := newRouteRegexp(tpl, matchHost, matchPrefix, matchQuery, r.strictSlash, r.useEncodedPath)
+	rr, err := newRouteRegexp(tpl, typ, routeRegexpOptions{
+		strictSlash:    r.strictSlash,
+		useEncodedPath: r.useEncodedPath,
+	})
 	if err != nil {
 		return err
 	}
@@ -191,7 +196,7 @@ func (r *Route) addRegexpMatcher(tpl string, matchHost, matchPrefix, matchQuery
 			return err
 		}
 	}
-	if matchHost {
+	if typ == regexpTypeHost {
 		if r.regexp.path != nil {
 			if err = uniqueVars(rr.varsN, r.regexp.path.varsN); err != nil {
 				return err
@@ -204,7 +209,7 @@ func (r *Route) addRegexpMatcher(tpl string, matchHost, matchPrefix, matchQuery
 				return err
 			}
 		}
-		if matchQuery {
+		if typ == regexpTypeQuery {
 			r.regexp.queries = append(r.regexp.queries, rr)
 		} else {
 			r.regexp.path = rr
@@ -256,7 +261,8 @@ func (m headerRegexMatcher) Match(r *http.Request, match *RouteMatch) bool {
 //               "X-Requested-With", "XMLHttpRequest")
 //
 // The above route will only match if both the request header matches both regular expressions.
-// It the value is an empty string, it will match any value if the key is set.
+// If the value is an empty string, it will match any value if the key is set.
+// Use the start and end of string anchors (^ and $) to match an exact value.
 func (r *Route) HeadersRegexp(pairs ...string) *Route {
 	if r.err == nil {
 		var headers map[string]*regexp.Regexp
@@ -286,7 +292,7 @@ func (r *Route) HeadersRegexp(pairs ...string) *Route {
 // Variable names must be unique in a given route. They can be retrieved
 // calling mux.Vars(request).
 func (r *Route) Host(tpl string) *Route {
-	r.err = r.addRegexpMatcher(tpl, true, false, false)
+	r.err = r.addRegexpMatcher(tpl, regexpTypeHost)
 	return r
 }
 
@@ -346,7 +352,7 @@ func (r *Route) Methods(methods ...string) *Route {
 // Variable names must be unique in a given route. They can be retrieved
 // calling mux.Vars(request).
 func (r *Route) Path(tpl string) *Route {
-	r.err = r.addRegexpMatcher(tpl, false, false, false)
+	r.err = r.addRegexpMatcher(tpl, regexpTypePath)
 	return r
 }
 
@@ -362,7 +368,7 @@ func (r *Route) Path(tpl string) *Route {
 // Also note that the setting of Router.StrictSlash() has no effect on routes
 // with a PathPrefix matcher.
 func (r *Route) PathPrefix(tpl string) *Route {
-	r.err = r.addRegexpMatcher(tpl, false, true, false)
+	r.err = r.addRegexpMatcher(tpl, regexpTypePrefix)
 	return r
 }
 
@@ -393,7 +399,7 @@ func (r *Route) Queries(pairs ...string) *Route {
 		return nil
 	}
 	for i := 0; i < length; i += 2 {
-		if r.err = r.addRegexpMatcher(pairs[i]+"="+pairs[i+1], false, false, true); r.err != nil {
+		if r.err = r.addRegexpMatcher(pairs[i]+"="+pairs[i+1], regexpTypeQuery); r.err != nil {
 			return r
 		}
 	}
diff --git a/vendor/github.com/gorilla/mux/test_helpers.go b/vendor/github.com/gorilla/mux/test_helpers.go
new file mode 100644
index 0000000..8b2c4a4
--- /dev/null
+++ b/vendor/github.com/gorilla/mux/test_helpers.go
@@ -0,0 +1,18 @@
+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package mux
+
+import "net/http"
+
+// SetURLVars sets the URL variables for the given request, to be accessed via
+// mux.Vars for testing route behaviour.
+//
+// This API should only be used for testing purposes; it provides a way to
+// inject variables into the request context. Alternatively, URL variables
+// can be set by making a route that captures the required variables,
+// starting a server and sending the request to that server.
+func SetURLVars(r *http.Request, val map[string]string) *http.Request {
+	return setVars(r, val)
+}