github.com/kaydxh/golang@v0.0.131/go/net/http/http_transport.proxy.go (about)

     1  /*
     2   *Copyright (c) 2023, kaydxh
     3   *
     4   *Permission is hereby granted, free of charge, to any person obtaining a copy
     5   *of this software and associated documentation files (the "Software"), to deal
     6   *in the Software without restriction, including without limitation the rights
     7   *to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     8   *copies of the Software, and to permit persons to whom the Software is
     9   *furnished to do so, subject to the following conditions:
    10   *
    11   *The above copyright notice and this permission notice shall be included in all
    12   *copies or substantial portions of the Software.
    13   *
    14   *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    15   *IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    16   *FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    17   *AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    18   *LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    19   *OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    20   *SOFTWARE.
    21   */
    22  package http
    23  
    24  import (
    25  	"crypto/tls"
    26  	"net"
    27  	"net/http"
    28  	"net/url"
    29  	"time"
    30  
    31  	resolve_ "github.com/kaydxh/golang/go/net/resolver/resolve"
    32  	logs_ "github.com/kaydxh/golang/pkg/logs"
    33  )
    34  
    35  func RequestWithContextProxy(req *http.Request, proxy *Proxy) *http.Request {
    36  	if proxy == nil {
    37  		return req
    38  	}
    39  	return req.WithContext(WithContextProxy(req.Context(), proxy))
    40  }
    41  
    42  func ProxyFuncFromContextOrEnvironment(req *http.Request) (*url.URL, error) {
    43  	logger := logs_.GetLogger(req.Context())
    44  	proxy := FromContextProxy(req.Context())
    45  	if proxy == nil || proxy.ProxyUrl == "" {
    46  		return http.ProxyFromEnvironment(req)
    47  	}
    48  	defer func() {
    49  		logger.Infof("http request proxy: %v", proxy)
    50  	}()
    51  
    52  	proxyUrl, err := ParseProxyUrl(proxy.ProxyUrl)
    53  	if err != nil {
    54  		return nil, err
    55  	}
    56  	if proxyUrl == nil {
    57  		return nil, nil
    58  	}
    59  
    60  	if proxy.ProxyTarget == "" {
    61  		return proxyUrl, nil
    62  	}
    63  
    64  	// replace host of proxy if target of proxy if resolved
    65  	address, err := resolve_.ResolveOne(req.Context(), proxy.ProxyTarget)
    66  	if err != nil {
    67  		return nil, err
    68  	}
    69  	if address.Addr != "" {
    70  		proxyUrl.Host = address.Addr
    71  	}
    72  	proxy.ProxyAddrResolved = address
    73  
    74  	return proxyUrl, nil
    75  }
    76  
    77  var DefaultTransportInsecureWithProxy http.RoundTripper = &http.Transport{
    78  	Proxy: ProxyFuncFromContextOrEnvironment,
    79  	DialContext: (&net.Dialer{
    80  		Timeout:   30 * time.Second,
    81  		KeepAlive: 30 * time.Second,
    82  	}).DialContext,
    83  	ForceAttemptHTTP2:     true,
    84  	MaxIdleConns:          100,
    85  	IdleConnTimeout:       90 * time.Second,
    86  	TLSHandshakeTimeout:   10 * time.Second,
    87  	ExpectContinueTimeout: 1 * time.Second,
    88  	// skip verify for https
    89  	TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
    90  }