How to write HTTP proxy requests using Golang
The power of Golang language lies in its high efficiency and powerful network programming capabilities. Among them, HTTP proxy request is one of the problems that developers often encounter.
In this article, we will explore how to write HTTP proxy requests using Golang. We will achieve this through the following steps:
- Understand how HTTP proxy requests work
- Write HTTP proxy request code
- Add proxy authentication function
- Solve common problems with proxy requests
Understand how HTTP proxy requests work
HTTP proxy requests are a network communication protocol that allow clients to send requests through a proxy server to access a target website . This proxy server blocks direct communication between the client and the target server by forwarding requests and responses. There are two types of proxy servers: forward proxy and reverse proxy.
A forward proxy is a server that sits between the client and the target server. The client sends a request to the proxy server, and the proxy server forwards the request to the target server and returns the target server's response to the client. Using a forward proxy can hide the client IP address and control and monitor data in the network.
A reverse proxy is a server that sits between the target server and the client. Forward requests to the best server to improve system performance, scalability, and security. Reverse proxies are often used for load balancing to ensure efficient network communication.
In this article, we will introduce how to use Golang to write forward proxy request code.
Writing HTTP proxy request code
Next, we will introduce how to use Golang to write HTTP proxy request code:
- First, we need to import the net/http package and fmt package.
package main import ( "fmt" "net/http" )
- Next, we need to write a processing function that receives two parameters: one is the request request and the other is the response response. The code in the function will send the request and return the response.
func handler(w http.ResponseWriter, r *http.Request) {
response, err := http.Get("https://www.google.com")
if err != nil {
fmt.Fprintf(w, "Error Occured: %s", err.Error())
}else {
fmt.Fprintf(w, "<html><head><title>%s</title></head><body>", response.Status)
fmt.Fprintf(w, "<h1>Status</h1>")
fmt.Fprintf(w, "<pre class="brush:php;toolbar:false">%s", response.Status)
fmt.Fprintf(w, "Header
") for k, v := range response.Header { fmt.Fprintf(w, "%s: %s", k, v[0]) } fmt.Fprintf(w, "