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package lfshttp
import (
"net/http"
"net/url"
"strings"
"github.com/git-lfs/git-lfs/v3/config"
"golang.org/x/net/http/httpproxy"
)
// Logic is copied, with small changes, from "net/http".ProxyFromEnvironment in the go std lib.
func proxyFromClient(c *Client) func(req *http.Request) (*url.URL, error) {
return func(req *http.Request) (*url.URL, error) {
httpsProxy, httpProxy, noProxy := getProxyServers(req.URL, c.uc, c.osEnv)
var proxy string
if req.URL.Scheme == "https" {
proxy = httpsProxy
}
if len(proxy) == 0 {
proxy = httpProxy
}
if len(proxy) == 0 {
return nil, nil
}
if strings.HasPrefix(proxy, "socks5h://") {
proxy = strings.Replace(proxy, "socks5h://", "socks5://", 1)
}
cfg := &httpproxy.Config{
HTTPProxy: proxy,
HTTPSProxy: proxy,
NoProxy: noProxy,
CGI: false,
}
// We want to use the standard logic except that we want to
// allow proxies for localhost, which the standard library does
// not. Since the proxy code looks only at the URL, we
// synthesize a fake URL except that we rewrite "localhost" to
// "127.0.0.1" for purposes of looking up the proxy.
u := *(req.URL)
if u.Host == "localhost" {
u.Host = "127.0.0.1"
}
return cfg.ProxyFunc()(&u)
}
}
func getProxyServers(u *url.URL, urlCfg *config.URLConfig, osEnv config.Environment) (httpsProxy string, httpProxy string, noProxy string) {
if osEnv == nil {
return
}
if len(httpsProxy) == 0 {
httpsProxy, _ = osEnv.Get("HTTPS_PROXY")
}
if len(httpsProxy) == 0 {
httpsProxy, _ = osEnv.Get("https_proxy")
}
if len(httpProxy) == 0 {
httpProxy, _ = osEnv.Get("HTTP_PROXY")
}
if len(httpProxy) == 0 {
httpProxy, _ = osEnv.Get("http_proxy")
}
if urlCfg != nil {
gitProxy, ok := urlCfg.Get("http", u.String(), "proxy")
if len(gitProxy) > 0 && ok {
if u.Scheme == "https" {
httpsProxy = gitProxy
}
httpProxy = gitProxy
}
}
noProxy, _ = osEnv.Get("NO_PROXY")
if len(noProxy) == 0 {
noProxy, _ = osEnv.Get("no_proxy")
}
return
}
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