为 HTTP 客户端设置代理 [英] Setting up proxy for HTTP client

问题描述

我正在尝试设置 HTTP 客户端，以便它使用代理，但是我不太明白该怎么做.该文档多次引用代理"，但似乎没有一个函数允许定义代理.我需要的是这样的:

I'm trying to setup the HTTP client so that it uses a proxy, however I cannot quite understand how to do it. The documentation has multiple reference to "proxy" but none of the functions seem to allow to define the proxy. What I need is something like this:

client := &http.Client{}
client.SetProxy("someip:someport") // pseudo code
resp, err := client.Get("http://example.com") // do request through proxy

知道如何在 Go 中做到这一点吗?

Any idea how to do this in Go?

推荐答案

lukad 是正确的，你可以设置 HTTP_PROXY 环境变量，如果你这样做 Go 将默认使用它.

lukad is correct, you could set the HTTP_PROXY environment variable, if you do this Go will use it by default.

重击:

export HTTP_PROXY="http://proxyIp:proxyPort"

去:

os.Setenv("HTTP_PROXY", "http://proxyIp:proxyPort")

您也可以构建自己的 http.Client，无论环境配置如何，它都必须使用代理:

You could also construct your own http.Client that MUST use a proxy regardless of the environment's configuration:

proxyUrl, err := url.Parse("http://proxyIp:proxyPort")
myClient := &http.Client{Transport: &http.Transport{Proxy: http.ProxyURL(proxyUrl)}}

如果你不能依赖环境的配置，或者不想修改它，这很有用.

This is useful if you can not depend on the environment's configuration, or do not want to modify it.

您还可以修改net/http"包使用的默认传输.这会影响您的整个程序(包括默认的 HTTP 客户端).

You could also modify the default transport used by the "net/http" package. This would affect your entire program (including the default HTTP client).

proxyUrl, err := url.Parse("http://proxyIp:proxyPort")
http.DefaultTransport = &http.Transport{Proxy: http.ProxyURL(proxyUrl)}

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