curl下载安装与使用

下载：

https://curl.haxx.se/download.html

安装：

二进制安装。即解压即可。

使用

1、获取页面内容。

不加任何参数时，默认会发送GET请求来获取url内容到标准输出。

curl  url

 

D:\AppCache\GolangHome\src\learn>curl www.apple.com

#===============================================================
D:\AppCache\GolangHome\src\learn>curl www.google.com
curl: (52) Empty reply from server

#===============================================================
D:\AppCache\GolangHome\src\learn>curl www.xiaomi.com
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html>
<head><title>301 Moved Permanently</title></head>
<body bgcolor="white">
<center><h1>301 Moved Permanently</h1></center>
<hr/>Powered by MiWeb</body>
</html>

#==============================================================
D:\AppCache\GolangHome\src\learn>curl www.baidu.com
<!DOCTYPE html>
<!--STATUS OK--><html> <head><meta http-equiv=content-type content=text/html;charset=utf-8><meta http-equiv=X-UA-Compatible content=IE=Edge><meta content=always name=referrer><link rel=stylesheet type=text/css href=http://s1.bdstati
c.com/r/www/cache/bdorz/baidu.min.css><title>百度一下，你就知道</title></head> <body link=#0000cc> <div id=wrapper> <div id=head> <div class=head_wrapper> <div class=s_form> <div class=s_form_wrapper> <div id=lg> <img hidefocus=true
 src=//www.baidu.com/img/bd_logo1.png width=270 height=129> </div> <form id=form name=f action=//www.baidu.com/s class=fm> <input type=hidden name=bdorz_come value=1> <input type=hidden name=ie value=utf-8> <input type=hidden name=f
 value=8> <input type=hidden name=rsv_bp value=1> <input type=hidden name=rsv_idx value=1> <input type=hidden name=tn value=baidu><span class="bg s_ipt_wr"><input id=kw name=wd class=s_ipt value maxlength=255 autocomplete=off autofo
cus></span><span class="bg s_btn_wr"><input type=submit id=su value=百度一下 class="bg s_btn"></span> </form> </div> </div> <div id=u1> <a href=http://news.baidu.com name=tj_trnews class=mnav>新闻</a> <a href=http://www.hao123.com n
ame=tj_trhao123 class=mnav>hao123</a> <a href=http://map.baidu.com name=tj_trmap class=mnav>地图</a> <a href=http://v.baidu.com name=tj_trvideo class=mnav>视频</a> <a href=http://tieba.baidu.com name=tj_trtieba class=mnav>贴吧</a> <
noscript> <a href=http://www.baidu.com/bdorz/login.gif?login&amp;tpl=mn&amp;u=http%3A%2F%2Fwww.baidu.com%2f%3fbdorz_come%3d1 name=tj_login class=lb>登录</a> </noscript> <script>document.write('<a href="http://www.baidu.com/bdorz/log
in.gif?login&tpl=mn&u='+ encodeURIComponent(window.location.href+ (window.location.search === "" ? "?" : "&")+ "bdorz_come=1")+ '" name="tj_login" class="lb">登录</a>');</script> <a href=//www.baidu.com/more/ name=tj_briicon class=b
ri style="display: block;">更多产品</a> </div> </div> </div> <div id=ftCon> <div id=ftConw> <p id=lh> <a href=http://home.baidu.com>关于百度</a> <a href=http://ir.baidu.com>About Baidu</a> </p> <p id=cp>&copy;2017&nbsp;Baidu&nbsp;<a
 href=http://www.baidu.com/duty/>使用百度前必读</a>&nbsp; <a href=http://jianyi.baidu.com/ class=cp-feedback>意见反馈</a>&nbsp;京ICP证030173号&nbsp; <img src=//www.baidu.com/img/gs.gif> </p> </div> </div> </div> </body> </html>

#===================================================================
D:\AppCache\GolangHome\src\learn>

 

 分别测试了苹果、谷歌、小米、百度。发现获得的页面内容大小相差较大。苹果啥也不给，霸道。谷歌则给了一句温馨提示语。小米则简洁地回应了一个html，重定向了。百度则回应一堆信息。

 

2、获取http响应的头部信息。

 

D:\AppCache\GolangHome\src\learn>curl -I http://www.apple.com
HTTP/1.1 301 Moved Permanently
Server: GHost
Content-Length: 0
Location: https://www.apple.com/
Cache-Control: max-age=0
Expires: Sun, 22 Sep 2019 04:59:29 GMT
Date: Sun, 22 Sep 2019 04:59:29 GMT
Connection: keep-alive
strict-transport-security: max-age=31536000
Set-Cookie: geo=CN; path=/; domain=.apple.com
Set-Cookie: ccl=shCgHjtuYBarTIycW/rvIg==; path=/; domain=.apple.com


#===================================================================
D:\AppCache\GolangHome\src\learn>curl -I http://www.google.com
curl: (52) Empty reply from server

#====================================================================
D:\AppCache\GolangHome\src\learn>curl -I http://www.xiaomi.com
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Sun, 22 Sep 2019 04:59:53 GMT
Content-Type: text/html
Content-Length: 223
Connection: close
Location: https://www.mi.com


#===================================================================
D:\AppCache\GolangHome\src\learn>curl -I http://www.baidu.com
HTTP/1.1 200 OK
Server: bfe/1.0.8.18
Date: Sun, 22 Sep 2019 05:00:01 GMT
Content-Type: text/html
Content-Length: 277
Last-Modified: Mon, 13 Jun 2016 02:50:23 GMT
Connection: Keep-Alive
ETag: "575e1f6f-115"
Cache-Control: private, no-cache, no-store, proxy-revalidate, no-transform
Pragma: no-cache
Accept-Ranges: bytes


#==========================================================================
D:\AppCache\GolangHome\src\learn>

 

这次谷歌给的响应头依然是一句简短的提示语，太节约资源了。其他三个则普通给出响应头，其中苹果和小米都重定向了。

 

4、同时给出http的响应头和响应体。

D:\AppCache\GolangHome\src\learn>curl -i http://www.google.com
curl: (52) Empty reply from server

#===============================================================
D:\AppCache\GolangHome\src\learn>curl -i http://www.apple.com
HTTP/1.1 301 Moved Permanently
Server: GHost
Content-Length: 0
Location: https://www.apple.com/
Cache-Control: max-age=0
Expires: Sun, 22 Sep 2019 05:10:26 GMT
Date: Sun, 22 Sep 2019 05:10:26 GMT
Connection: keep-alive
strict-transport-security: max-age=31536000
Set-Cookie: geo=CN; path=/; domain=.apple.com
Set-Cookie: ccl=Pnj18CxjBB4h7LQaKIIkxg==; path=/; domain=.apple.com


#=====================================================================
D:\AppCache\GolangHome\src\learn>curl -i http://www.xiaomi.com
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Sun, 22 Sep 2019 05:10:35 GMT
Content-Type: text/html
Content-Length: 223
Connection: close
Location: https://www.mi.com

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html>
<head><title>301 Moved Permanently</title></head>
<body bgcolor="white">
<center><h1>301 Moved Permanently</h1></center>
<hr/>Powered by MiWeb</body>
</html>

#=============================================================
D:\AppCache\GolangHome\src\learn>curl -i http://www.baidu.com
HTTP/1.1 200 OK
Server: bfe/1.0.8.18
Date: Sun, 22 Sep 2019 05:10:47 GMT
Content-Type: text/html
Content-Length: 2381
Last-Modified: Mon, 23 Jan 2017 13:28:12 GMT
Connection: Keep-Alive
ETag: "588604ec-94d"
Cache-Control: private, no-cache, no-store, proxy-revalidate, no-transform
Pragma: no-cache
Set-Cookie: BDORZ=27315; max-age=86400; domain=.baidu.com; path=/
Accept-Ranges: bytes

<!DOCTYPE html>
<!--STATUS OK--><html> <head><meta http-equiv=content-type content=text/html;charset=utf-8><meta http-equiv=X-UA-Compatible content=IE=Edge><meta content=always name=referrer><link rel=stylesheet type=text/css href=http://s1.bdstati
c.com/r/www/cache/bdorz/baidu.min.css><title>百度一下，你就知道</title></head> <body link=#0000cc> <div id=wrapper> <div id=head> <div class=head_wrapper> <div class=s_form> <div class=s_form_wrapper> <div id=lg> <img hidefocus=true
 src=//www.baidu.com/img/bd_logo1.png width=270 height=129> </div> <form id=form name=f action=//www.baidu.com/s class=fm> <input type=hidden name=bdorz_come value=1> <input type=hidden name=ie value=utf-8> <input type=hidden name=f
 value=8> <input type=hidden name=rsv_bp value=1> <input type=hidden name=rsv_idx value=1> <input type=hidden name=tn value=baidu><span class="bg s_ipt_wr"><input id=kw name=wd class=s_ipt value maxlength=255 autocomplete=off autofo
cus></span><span class="bg s_btn_wr"><input type=submit id=su value=百度一下 class="bg s_btn"></span> </form> </div> </div> <div id=u1> <a href=http://news.baidu.com name=tj_trnews class=mnav>新闻</a> <a href=http://www.hao123.com n
ame=tj_trhao123 class=mnav>hao123</a> <a href=http://map.baidu.com name=tj_trmap class=mnav>地图</a> <a href=http://v.baidu.com name=tj_trvideo class=mnav>视频</a> <a href=http://tieba.baidu.com name=tj_trtieba class=mnav>贴吧</a> <
noscript> <a href=http://www.baidu.com/bdorz/login.gif?login&amp;tpl=mn&amp;u=http%3A%2F%2Fwww.baidu.com%2f%3fbdorz_come%3d1 name=tj_login class=lb>登录</a> </noscript> <script>document.write('<a href="http://www.baidu.com/bdorz/log
in.gif?login&tpl=mn&u='+ encodeURIComponent(window.location.href+ (window.location.search === "" ? "?" : "&")+ "bdorz_come=1")+ '" name="tj_login" class="lb">登录</a>');</script> <a href=//www.baidu.com/more/ name=tj_briicon class=b
ri style="display: block;">更多产品</a> </div> </div> </div> <div id=ftCon> <div id=ftConw> <p id=lh> <a href=http://home.baidu.com>关于百度</a> <a href=http://ir.baidu.com>About Baidu</a> </p> <p id=cp>&copy;2017&nbsp;Baidu&nbsp;<a
 href=http://www.baidu.com/duty/>使用百度前必读</a>&nbsp; <a href=http://jianyi.baidu.com/ class=cp-feedback>意见反馈</a>&nbsp;京ICP证030173号&nbsp; <img src=//www.baidu.com/img/gs.gif> </p> </div> </div> </div> </body> </html>

#====================================================

D:\AppCache\GolangHome\src\learn>

 

谷歌依旧发挥着极简风格，就一句话。苹果给头不给体。小米则都给。百度则臃肿不堪。

 

posted @ 2019-09-22 12:25  igoodful  阅读(2425)  评论(0)  编辑  收藏  举报