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How to Properly Configure HTTP Proxy Authentication in Go?

Linda Hamilton
Release: 2024-12-16 03:24:10
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How to Properly Configure HTTP Proxy Authentication in Go?

HTTP Proxy with Authentication in Go

Setting up a proxy with authentication for HTTP requests can be challenging, especially when incorporating it into existing third-party code. This article delves into a specific issue encountered while attempting to add proxy authentication to an existing codebase.

Problem Statement:

The code snippet provided establishes an HTTP proxy without authentication using a transport object with the ProxyURL function. However, adding the Proxy-Authorization header to the response object after the POST request fails to authenticate the proxy.

Solution:

To resolve this issue, directly specify the proxy URL with authentication credentials in the transport object.

// Create an HTTP client with proxy authentication
client := &http.Client{
  Transport: &http.Transport{
    Proxy: http.ProxyURL(&url.URL{
      Scheme: "http",
      User:   url.UserPassword("username", "password"),
      Host:   "proxy.com:8080",
    }),
  },
}

// Use the client to make requests with proxy authentication
resp, err := client.PostForm(method, params)
Copy after login

Alternatively, the proxy URL can also be parsed directly.

// Parse the proxy URL
proxyURL, _ := url.Parse("http://username:password@proxy.com:8080")

// Create an HTTP client with proxy authentication
client := &http.Client{
  Transport: &http.Transport{
    Proxy: http.ProxyURL(proxyURL),
  },
}

// Use the client to make requests with proxy authentication
resp, err := client.PostForm(method, params)
Copy after login

This approach ensures that the proxy credentials are incorporated into the transport object, allowing the HTTP POST request to use the authenticated proxy.

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