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// Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package proxy
import (
"net/http"
"net/url"
"os"
"strings"
"sync"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"github.com/gobwas/glob"
)
var (
once sync.Once
hostMatchers []glob.Glob
)
// GetProxyURL returns proxy url
func GetProxyURL() string {
if !setting.Proxy.Enabled {
return ""
}
if setting.Proxy.ProxyURL == "" {
if os.Getenv("http_proxy") != "" {
return os.Getenv("http_proxy")
}
return os.Getenv("https_proxy")
}
return setting.Proxy.ProxyURL
}
// Match return true if url needs to be proxied
func Match(u string) bool {
if !setting.Proxy.Enabled {
return false
}
// enforce do once
Proxy()
for _, v := range hostMatchers {
if v.Match(u) {
return true
}
}
return false
}
// Proxy returns the system proxy
func Proxy() func(req *http.Request) (*url.URL, error) {
if !setting.Proxy.Enabled {
return func(req *http.Request) (*url.URL, error) {
return nil, nil
}
}
if setting.Proxy.ProxyURL == "" {
return http.ProxyFromEnvironment
}
once.Do(func() {
for _, h := range setting.Proxy.ProxyHosts {
if g, err := glob.Compile(h); err == nil {
hostMatchers = append(hostMatchers, g)
} else {
log.Error("glob.Compile %s failed: %v", h, err)
}
}
})
return func(req *http.Request) (*url.URL, error) {
for _, v := range hostMatchers {
if v.Match(req.URL.Host) {
return http.ProxyURL(setting.Proxy.ProxyURLFixed)(req)
}
}
return http.ProxyFromEnvironment(req)
}
}
// EnvWithProxy returns os.Environ(), with a https_proxy env, if the given url
// needs to be proxied.
func EnvWithProxy(u *url.URL) []string {
envs := os.Environ()
if strings.EqualFold(u.Scheme, "http") || strings.EqualFold(u.Scheme, "https") {
if Match(u.Host) {
envs = append(envs, "https_proxy="+GetProxyURL())
}
}
return envs
}
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