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