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// Copyright 2013 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 handlers
import (
"io"
"log"
"net/http"
"net/http/httptest"
"net/url"
"strings"
"testing"
)
const (
ok = "ok\n"
notAllowed = "Method not allowed\n"
)
var okHandler = http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
_, err := w.Write([]byte(ok))
if err != nil {
log.Fatalf("error on writing to http.ResponseWriter: %v", err)
}
})
func newRequest(method, url string) *http.Request {
req, err := http.NewRequest(method, url, nil)
if err != nil {
panic(err)
}
return req
}
func TestMethodHandler(t *testing.T) {
tests := []struct {
req *http.Request
handler http.Handler
code int
allow string // Contents of the Allow header
body string
}{
// No handlers
{newRequest(http.MethodGet, "/foo"), MethodHandler{}, http.StatusMethodNotAllowed, "", notAllowed},
{newRequest(http.MethodOptions, "/foo"), MethodHandler{}, http.StatusOK, "", ""},
// A single handler
{newRequest(http.MethodGet, "/foo"), MethodHandler{http.MethodGet: okHandler}, http.StatusOK, "", ok},
{newRequest(http.MethodPost, "/foo"), MethodHandler{http.MethodGet: okHandler}, http.StatusMethodNotAllowed, http.MethodGet, notAllowed},
// Multiple handlers
{newRequest(http.MethodGet, "/foo"), MethodHandler{http.MethodGet: okHandler, http.MethodPost: okHandler}, http.StatusOK, "", ok},
{newRequest(http.MethodPost, "/foo"), MethodHandler{http.MethodGet: okHandler, http.MethodPost: okHandler}, http.StatusOK, "", ok},
{newRequest(http.MethodDelete, "/foo"), MethodHandler{http.MethodGet: okHandler, http.MethodPost: okHandler}, http.StatusMethodNotAllowed, "GET, POST", notAllowed},
{newRequest(http.MethodOptions, "/foo"), MethodHandler{http.MethodGet: okHandler, http.MethodPost: okHandler}, http.StatusOK, "GET, POST", ""},
// Override OPTIONS
{newRequest(http.MethodOptions, "/foo"), MethodHandler{http.MethodOptions: okHandler}, http.StatusOK, "", ok},
}
for i, test := range tests {
rec := httptest.NewRecorder()
test.handler.ServeHTTP(rec, test.req)
resp := rec.Result()
if resp.StatusCode != test.code {
t.Fatalf("%d: wrong code, got %d want %d", i, resp.StatusCode, test.code)
}
if allow := resp.Header.Get("Allow"); allow != test.allow {
t.Fatalf("%d: wrong Allow, got %s want %s", i, allow, test.allow)
}
respBodyBytes, err := io.ReadAll(resp.Body)
if err != nil {
t.Errorf("io error while reading response body %v", err)
}
if body := string(respBodyBytes); body != test.body {
t.Fatalf("%d: wrong body, got %q want %q", i, body, test.body)
}
}
}
func TestContentTypeHandler(t *testing.T) {
tests := []struct {
Method string
AllowContentTypes []string
ContentType string
Code int
}{
{http.MethodPost, []string{"application/json"}, "application/json", http.StatusOK},
{http.MethodPost, []string{"application/json", "application/xml"}, "application/json", http.StatusOK},
{http.MethodPost, []string{"application/json"}, "application/json; charset=utf-8", http.StatusOK},
{http.MethodPost, []string{"application/json"}, "application/json+xxx", http.StatusUnsupportedMediaType},
{http.MethodPost, []string{"application/json"}, "text/plain", http.StatusUnsupportedMediaType},
{http.MethodGet, []string{"application/json"}, "", http.StatusOK},
{http.MethodGet, []string{}, "", http.StatusOK},
}
for _, test := range tests {
r, err := http.NewRequest(test.Method, "/", nil)
if err != nil {
t.Error(err)
continue
}
h := ContentTypeHandler(okHandler, test.AllowContentTypes...)
r.Header.Set("Content-Type", test.ContentType)
w := httptest.NewRecorder()
h.ServeHTTP(w, r)
if w.Code != test.Code {
t.Errorf("expected %d, got %d", test.Code, w.Code)
}
}
}
func TestHTTPMethodOverride(t *testing.T) {
tests := []struct {
Method string
OverrideMethod string
ExpectedMethod string
}{
{http.MethodPost, http.MethodPut, http.MethodPut},
{http.MethodPost, http.MethodPatch, http.MethodPatch},
{http.MethodPost, http.MethodDelete, http.MethodDelete},
{http.MethodPut, http.MethodDelete, http.MethodPut},
{http.MethodGet, http.MethodGet, http.MethodGet},
{http.MethodHead, http.MethodHead, http.MethodHead},
{http.MethodGet, http.MethodPut, http.MethodGet},
{http.MethodHead, http.MethodDelete, http.MethodHead},
}
for _, test := range tests {
h := HTTPMethodOverrideHandler(okHandler)
reqs := make([]*http.Request, 0, 2)
rHeader, err := http.NewRequest(test.Method, "/", nil)
if err != nil {
t.Error(err)
}
rHeader.Header.Set(HTTPMethodOverrideHeader, test.OverrideMethod)
reqs = append(reqs, rHeader)
f := url.Values{HTTPMethodOverrideFormKey: []string{test.OverrideMethod}}
rForm, err := http.NewRequest(test.Method, "/", strings.NewReader(f.Encode()))
if err != nil {
t.Error(err)
}
rForm.Header.Set("Content-Type", "application/x-www-form-urlencoded")
reqs = append(reqs, rForm)
for _, r := range reqs {
w := httptest.NewRecorder()
h.ServeHTTP(w, r)
if r.Method != test.ExpectedMethod {
t.Errorf("Expected %s, got %s", test.ExpectedMethod, r.Method)
}
}
}
}
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