153 lines
3.6 KiB
Go
153 lines
3.6 KiB
Go
package lfsapi
|
|
|
|
import (
|
|
"net/http"
|
|
"net/url"
|
|
"strings"
|
|
|
|
"github.com/git-lfs/git-lfs/config"
|
|
|
|
"fmt"
|
|
)
|
|
|
|
// 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 !useProxy(noProxy, canonicalAddr(req.URL)) {
|
|
return nil, nil
|
|
}
|
|
|
|
proxyURL, err := url.Parse(proxy)
|
|
if err != nil || !strings.HasPrefix(proxyURL.Scheme, "http") {
|
|
// proxy was bogus. Try prepending "http://" to it and
|
|
// see if that parses correctly. If not, we fall
|
|
// through and complain about the original one.
|
|
if httpProxyURL, httpErr := url.Parse("http://" + proxy); httpErr == nil {
|
|
return httpProxyURL, nil
|
|
}
|
|
}
|
|
if err != nil {
|
|
return nil, fmt.Errorf("invalid proxy address: %q: %v", proxy, err)
|
|
}
|
|
return proxyURL, nil
|
|
}
|
|
}
|
|
|
|
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 strings.HasPrefix(gitProxy, "https://") {
|
|
httpsProxy = gitProxy
|
|
}
|
|
httpProxy = gitProxy
|
|
}
|
|
}
|
|
|
|
noProxy, _ = osEnv.Get("NO_PROXY")
|
|
if len(noProxy) == 0 {
|
|
noProxy, _ = osEnv.Get("no_proxy")
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
// canonicalAddr returns url.Host but always with a ":port" suffix
|
|
// Copied from "net/http".ProxyFromEnvironment in the go std lib.
|
|
func canonicalAddr(url *url.URL) string {
|
|
addr := url.Host
|
|
if !hasPort(addr) {
|
|
return addr + ":" + portMap[url.Scheme]
|
|
}
|
|
return addr
|
|
}
|
|
|
|
// useProxy reports whether requests to addr should use a proxy,
|
|
// according to the noProxy or noProxy environment variable.
|
|
// addr is always a canonicalAddr with a host and port.
|
|
// Copied from "net/http".ProxyFromEnvironment in the go std lib
|
|
// and adapted to allow proxy usage even for localhost.
|
|
func useProxy(noProxy, addr string) bool {
|
|
if len(addr) == 0 {
|
|
return true
|
|
}
|
|
|
|
if noProxy == "*" {
|
|
return false
|
|
}
|
|
|
|
addr = strings.ToLower(strings.TrimSpace(addr))
|
|
if hasPort(addr) {
|
|
addr = addr[:strings.LastIndex(addr, ":")]
|
|
}
|
|
|
|
for _, p := range strings.Split(noProxy, ",") {
|
|
p = strings.ToLower(strings.TrimSpace(p))
|
|
if len(p) == 0 {
|
|
continue
|
|
}
|
|
if hasPort(p) {
|
|
p = p[:strings.LastIndex(p, ":")]
|
|
}
|
|
if addr == p {
|
|
return false
|
|
}
|
|
if p[0] == '.' && (strings.HasSuffix(addr, p) || addr == p[1:]) {
|
|
// noProxy ".foo.com" matches "bar.foo.com" or "foo.com"
|
|
return false
|
|
}
|
|
if p[0] != '.' && strings.HasSuffix(addr, p) && addr[len(addr)-len(p)-1] == '.' {
|
|
// noProxy "foo.com" matches "bar.foo.com"
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Given a string of the form "host", "host:port", or "[ipv6::address]:port",
|
|
// return true if the string includes a port.
|
|
// Copied from "net/http".ProxyFromEnvironment in the go std lib.
|
|
func hasPort(s string) bool { return strings.LastIndex(s, ":") > strings.LastIndex(s, "]") }
|
|
|
|
var (
|
|
portMap = map[string]string{
|
|
"http": "80",
|
|
"https": "443",
|
|
}
|
|
)
|