56 lines
1.4 KiB
Go
56 lines
1.4 KiB
Go
package proxy
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import (
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"fmt"
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"net/http"
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"net/url"
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"golang.org/x/net/proxy"
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)
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func GetClient(proxy string) (*http.Client, error) {
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if proxy == "" {
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return http.DefaultClient, nil
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}
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proxyUrl, err := url.Parse(proxy)
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if err != nil {
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return nil, fmt.Errorf("failed to parse proxyUrl, url:%s, err: %w", proxy, err)
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}
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if proxyUrl.Host == "unix" && proxyUrl.Scheme == "socks5" &&
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len(proxyUrl.Path) > 1 /* Path cannot be empty or just / */ {
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return unixSocks5Proxy(proxyUrl.Path)
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}
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return proxyHttp(proxyUrl)
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}
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func unixSocks5Proxy(path string) (*http.Client, error) {
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// TODO: Auth?
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dialer, err := proxy.SOCKS5("unix", path, nil /*auth*/, nil)
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if err != nil {
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return nil, fmt.Errorf("failed to make socks proxy, path: %s, err: %w", path, err)
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}
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ctxDialer, ok := dialer.(proxy.ContextDialer)
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if !ok {
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panic("proxy.SOCKS5 did not return a ContextDialer")
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}
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trans := defaultTransport()
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trans.DialContext = ctxDialer.DialContext
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trans.Proxy = nil
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return &http.Client{Transport: trans}, nil
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}
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func proxyHttp(proxyUrl *url.URL) (*http.Client, error) {
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trans := defaultTransport()
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trans.Proxy = http.ProxyURL(proxyUrl)
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return &http.Client{Transport: trans}, nil
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}
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func defaultTransport() *http.Transport {
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transPtr, ok := http.DefaultTransport.(*http.Transport)
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if !ok {
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panic("http.DefaultTransport is not a *http.Transport")
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}
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trans := transPtr.Clone()
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return trans
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}
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