HTTP tracing

Go supports HTTP tracing with the help of the net/http/httptrace standard package. That package allows you to trace the phases of an HTTP request. So, the use of the net/http/httptrace standard Go package will be illustrated in httpTrace.go, which is going to be presented in five parts.

The first part of httpTrace.go is as follows:

package main 
 
import ( 
    "fmt" 
    "io" 
    "net/http" 
    "net/http/httptrace" 
    "os" 
) 

As you might expect, you need to import the net/http/httptrace package in order to enable HTTP tracing.

The second part of httpTrace.go contains the following Go code:

func main() { 
    if len(os.Args) != 2 { 
        fmt.Printf("Usage: URL\n") 
        return 
    } 
 
    URL := os.Args[1] 
    client := http.Client{} 

In this part, we read the command-line arguments and create...