代码拉取完成,页面将自动刷新
/*
Copyright 2014 CoreOS, Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package cors
import (
"fmt"
"net/http"
"net/url"
"strings"
)
type CORSInfo map[string]bool
// CORSInfo implements the flag.Value interface to allow users to define a list of CORS origins
func (ci *CORSInfo) Set(s string) error {
m := make(map[string]bool)
for _, v := range strings.Split(s, ",") {
v = strings.TrimSpace(v)
if v == "" {
continue
}
if v != "*" {
if _, err := url.Parse(v); err != nil {
return fmt.Errorf("Invalid CORS origin: %s", err)
}
}
m[v] = true
}
*ci = CORSInfo(m)
return nil
}
func (ci *CORSInfo) String() string {
o := make([]string, 0)
for k, _ := range *ci {
o = append(o, k)
}
return strings.Join(o, ",")
}
// OriginAllowed determines whether the server will allow a given CORS origin.
func (c CORSInfo) OriginAllowed(origin string) bool {
return c["*"] || c[origin]
}
type CORSHandler struct {
Handler http.Handler
Info *CORSInfo
}
// addHeader adds the correct cors headers given an origin
func (h *CORSHandler) addHeader(w http.ResponseWriter, origin string) {
w.Header().Add("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
w.Header().Add("Access-Control-Allow-Origin", origin)
w.Header().Add("Access-Control-Allow-Headers", "accept, content-type")
}
// ServeHTTP adds the correct CORS headers based on the origin and returns immediately
// with a 200 OK if the method is OPTIONS.
func (h *CORSHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
// It is important to flush before leaving the goroutine.
// Or it may miss the latest info written.
defer w.(http.Flusher).Flush()
// Write CORS header.
if h.Info.OriginAllowed("*") {
h.addHeader(w, "*")
} else if origin := req.Header.Get("Origin"); h.Info.OriginAllowed(origin) {
h.addHeader(w, origin)
}
if req.Method == "OPTIONS" {
w.WriteHeader(http.StatusOK)
return
}
h.Handler.ServeHTTP(w, req)
}
此处可能存在不合适展示的内容,页面不予展示。您可通过相关编辑功能自查并修改。
如您确认内容无涉及 不当用语 / 纯广告导流 / 暴力 / 低俗色情 / 侵权 / 盗版 / 虚假 / 无价值内容或违法国家有关法律法规的内容,可点击提交进行申诉,我们将尽快为您处理。