golang http request encapsulation and usage

In modern Web development, HTTP requests are an important part. At the same time, in the Go language, there is a very convenient HTTP package available. Through this package, we can easily send HTTP requests. But in some cases, we may need more advanced functions, such as setting request headers, setting timeouts, etc. In this case, we need more detailed control over HTTP requests. In the Go language, a popular solution is to use a third-party HTTP request library, such as "go-httpclient", "go-resty", etc. In this article, we will introduce "goutils", a lightweight HTTP request library, and show how to send HTTP requests and control the details of HTTP requests through it.

First, we need to install the "goutils" library using Go Modules:

go get github.com/guonaihong/goutils

After the installation is complete, we can start using "goutils" to send HTTP requests. The following is a simple example:

package main

import (
    "fmt"
    "github.com/guonaihong/goutils"
)

func main() {
    url := "https://www.baidu.com"
    resp, err := goutils.Request("GET", url, nil, nil, nil)
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println(string(resp))
}

In the above code, we first define a URL, and then use the "Request" function of "goutils" to send an HTTP request. The first parameter of the "Request" function is the HTTP request method (GET, POST, PUT, DELETE, etc.), and the second parameter is the URL address. The third parameter is the Body of the HTTP request. In this example, we do not use the Body, so a null value (nil) is passed. The fourth parameter is the header of the HTTP request. Also in this example, we did not set any header, so a null value (nil) was passed. The last parameter is the configuration of the HTTP request. For example, we can use this parameter to set the TCP connection timeout, HTTP response timeout, etc. In this example, we also haven't set any configuration, so we pass a null value (nil).

After sending the HTTP request, we will get the response from the server. In this example, we convert the response to a string and print it.

When we need more advanced functionality, we can create a custom HTTP client by passing a "goutils.HttpOptions" parameter to the "NewHttpClient" function of "goutils". This parameter contains a series of properties, such as timeout, proxy, etc., through which we can control the details of the HTTP request. Here is an example of using "goutils" to customize the HTTP client:

package main

import (
    "fmt"
    "github.com/guonaihong/goutils"
)

func main() {
    url := "https://www.baidu.com"
    options := &goutils.HttpOptions{
        Timeout:        100, // TCP连接超时时间
        ConnectTimeout: 100, // HTTP响应超时时间
        Proxy:          "http://127.0.0.1:1080", // 代理
        Header: map[string][]string{
            "User-Agent":    {"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3"},
            "Accept":        {"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"},
            "Accept-Charset":{"UTF-8"},
        },
    }
    client := goutils.NewHttpClient(options)
    resp, err := client.Request("GET", url, nil, nil)
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println(string(resp))
}

In this example, we first define a "url", and then customize the properties of the HTTP client through "goutils.HttpOptions". We set the timeout, proxy, and request header so that we can have better control over the details of the HTTP request. Then, we send HTTP requests based on this custom HTTP client.

Summary

In this article, we introduced "goutils", a lightweight HTTP request library, and showed how to use it to send HTTP requests and control the details of HTTP requests. . You can easily send HTTP requests using the "goutils" library, and you can have more advanced control over HTTP requests by customizing the HTTP client. If you need to send HTTP requests or have more granular control over HTTP requests, then "goutils" may be a good choice for you.

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