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How do you handle HTTP errors in Go?

In Go, handling HTTP errors can be done using the net/http package, which provides a built-in support for handling HTTP errors. Here is an example code snippet that demonstrates how to handle HTTP errors in Go:
Handling HTTP Errors

Example

package main

import (
	"fmt"
	"net/http"
)

func main() {
	// send a GET request
	resp, err := http.Get("http://example.com")
	if err != nil {
		// handle error
		fmt.Println("Error sending request:", err)
		return
	}
	defer resp.Body.Close()

	// check for errors in the response status code
	if resp.StatusCode != http.StatusOK {
		// handle error
		fmt.Println("Error: unexpected status code:", resp.StatusCode)
		return
	}

	// process the response
	// ...
}

In this code snippet, we use the http.Get function to send a GET request to http://example.com. If an error occurs during the request, we handle it and exit the program. If the response status code is not http.StatusOK (i.e., 200), we handle the error and exit the program. Otherwise, we process the response as desired.

You can also handle errors in a more general way using the http.Response.StatusCode field and the http.Response.Body field. Here is an example code snippet that demonstrates this approach:

Example

package main

import (
	"fmt"
	"io/ioutil"
	"net/http"
)

func main() {
	// send a GET request
	resp, err := http.Get("http://example.com")
	if err != nil {
		// handle error
		fmt.Println("Error sending request:", err)
		return
	}
	defer resp.Body.Close()

	// read the response body
	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		// handle error
		fmt.Println("Error reading response body:", err)
		return
	}

	// check for errors in the response
	if resp.StatusCode != http.StatusOK {
		// handle error
		fmt.Println("Error:", resp.StatusCode, string(body))
		return
	}

	// process the response
	// ...
}

In this code snippet, we use the http.Get function to send a GET request to http://example.com. If an error occurs during the request or while reading the response body, we handle it and exit the program. We then check the response status code and response body for errors. If an error occurs, we handle it and exit the program. Otherwise, we process the response as desired.

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