Detailed explanation of curl command in linux-Linux Operation and Maintenance-php.cn

Detailed explanation of curl command in linux

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Release： 2020-10-14 17:06:31

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Usage details of the curl command in Linux: 1. [curl url] obtains the text information of the URL; 2. [curl -i url] obtains the text information and protocol header information of the URL; 3. [ curl -x proxy url】Use a proxy to obtain web page text information.

Detailed explanation of curl command in linux

Details of using the curl command in Linux:

1. curl url (get the URL Text information)

curl www.zhujy.com

This is the obtained www.zhujy.com information

<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
    body {
        width: 35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>

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2, curl -i url (Get the text information and protocol header information of the URL)

This is the obtained text information and protocol header information of www.zhujy.com.

HTTP/1.1 200 OK
Server: nginx/1.14.0
Date: Mon, 11 Mar 2019 02:06:55 GMT
Content-Type: text/html
Content-Length: 612
Last-Modified: Mon, 29 Oct 2018 09:52:22 GMT
Connection: keep-alive
ETag: "5bd6d856-264"
Accept-Ranges: bytes
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
    body {
        width: 35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>

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3. curl -x proxy url (use proxy to obtain web page text information)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
    <head>
        <title>Test Page for the Nginx HTTP Server on Fedora</title>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
        <style type="text/css">
            /*<![CDATA[*/
            body {
                background-color: #fff;
                color: #000;
                font-size: 0.9em;
                font-family: sans-serif,helvetica;
                margin: 0;
                padding: 0;
            }
            :link {
                color: #c00;
            }
            :visited {
                color: #c00;
            }
            a:hover {
                color: #f50;
            }
            h1 {
                text-align: center;
                margin: 0;
                padding: 0.6em 2em 0.4em;
                background-color: #294172;
                color: #fff;
                font-weight: normal;
                font-size: 1.75em;
                border-bottom: 2px solid #000;
            }
            h1 strong {
                font-weight: bold;
                font-size: 1.5em;
            }
            h2 {
                text-align: center;
                background-color: #3C6EB4;
                font-size: 1.1em;
                font-weight: bold;
                color: #fff;
                margin: 0;
                padding: 0.5em;
                border-bottom: 2px solid #294172;
            }
            hr {
                display: none;
            }
            .content {
                padding: 1em 5em;
            }
            .alert {
                border: 2px solid #000;
            }
            img {
                border: 2px solid #fff;
                padding: 2px;
                margin: 2px;
            }
            a:hover img {
                border: 2px solid #294172;
            }
            .logos {
                margin: 1em;
                text-align: center;
            }
            /*]]>*/
        </style>
    </head>
    <body>
        <h1>Welcome to <strong>nginx</strong> on Fedora!</h1>
        <div>
            <p>This page is used to test the proper operation of the
            <strong>nginx</strong> HTTP server after it has been
            installed. If you can read this page, it means that the
            web server installed at this site is working
            properly.</p>
            <div>
                <h2>Website Administrator</h2>
                <div>
                    <p>This is the default <tt>index.html</tt> page that
                    is distributed with <strong>nginx</strong> on
                    Fedora.  It is located in
                    <tt>/usr/share/nginx/html</tt>.</p>
                    <p>You should now put your content in a location of
                    your choice and edit the <tt>root</tt> configuration
                    directive in the <strong>nginx</strong>
                    configuration file
                    <tt>/etc/nginx/nginx.conf</tt>.</p>
                </div>
            </div>
            <div>
                <a href="http://nginx.net/"><img
                    src="nginx-logo.png" 
                    alt="[ Powered by nginx ]"
                    width="121" height="32" /></a>
                <a href="http://fedoraproject.org/"><img 
                    src="poweredby.png" 
                    alt="[ Powered by Fedora ]" 
                    width="88" height="31" /></a>
            </div>
        </div>
    </body>
</html>

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4. curl -X POST --header "Content-Type:application/json" --data '{}' url (use post to simulate json format request interface)

curl -X POST --header "Content-Type:application/json"  --data &#39;{}&#39;  127.0.0.1:8088/user/getAllUserInfo

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{"resultCode":"0","resultMsg":"成功","data":{"userList":[{"id":"a6fc8f27-e598-11e8-ba67-00163e14685b","name":"tom","age":"18","address":"北京1","stage":"NBA"},{"id":"24793d7c-e199-11e8-ba67-00163e14685b","name":"tom","age":"18","address":"北京3","stage":"NBA"},{"id":"247acf89-e599-11e8-ba67-00163e14685b","name":"jerry","age":"18","address":"深圳22","stage":"NBA"},{"id":"247cdafc-e599-11e8-ba67-00163e14685b","name":"james","age":"38","address":"广州d4","stage":"NBA"},{"id":"247ed96c-e599-11e8-ba67-00163e14685b","name":"curry","age":"58","address":"上海fv","stage":"NBA"},{"id":"24805b4e-e599-11e8-ba67-00163e14685b","name":"kaven","age":"78","address":"陇县","stage":"NBA"},{"id":"2481f851-e599-11e8-ba67-00163e14685b","name":"durant","age":"68","address":"富平","stage":"NBA"}]}}

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POST specifies the request method

– header specifies the request header information

–data specifies the json request body data content

5. curl -I url (only returns the request header information)

curl -I www.zhujy.com.cn

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HTTP/1.1 200 OK
Server: nginx/1.14.0
Date: Mon, 11 Mar 2019 03:34:29 GMT
Content-Type: text/html
Content-Length: 612
Last-Modified: Mon, 29 Oct 2018 09:52:22 GMT
Connection: keep-alive
ETag: "5bd6d856-264"
Accept-Ranges: bytes

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Related learning recommendations: linux video tutorial

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