取得头信息
curl --head 127.0.0.1
curl -I 127.0.0.1
取得http状态码（加-I只加载头信息，速度更快）
-w后加变量，获取很多与请求相关的额外信息显示在屏幕上，如%{http_code}显示状态码，%{time_total} 响应时间， %{size_download}页面大小， %{content_type} 页面类型
curl -s -o /dev/null -w "%{http_code}" http://jpuyy.com
curl -s -o /dev/null -I -w "%{http_code}" http://jpuyy.com
如果有一批url需要判断状态码，写入url_http_status.txt中，脚本如下：
#!/bin/bash
for i in `cat url_http_status.txt`
do
STATUS_CODE=`curl -o /dev/null -s -w %{http_code} $i`
echo -e "$i:\t$STATUS_CODE"
done
使用安静模式
--silent
curl 跟踪 301跳转，使用参数 -L
➜ ~ curl -I http://www.jpuyy.com -L
HTTP/1.1 301 Moved Permanently
Server: nginx/1.0.15
Date: Sun, 09 Nov 2014 10:40:15 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
X-Powered-By: PHP/5.3.3
X-CF-Powered-By: WP 1.3.14
X-Pingback: http://jpuyy.com/xmlrpc.php
Location: http://jpuyy.com/
HTTP/1.1 200 OK
Server: nginx/1.0.15
Date: Sun, 09 Nov 2014 10:40:16 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
Vary: Accept-Encoding
X-Powered-By: PHP/5.3.3
X-CF-Powered-By: WP 1.3.14
X-Pingback: http://jpuyy.com/xmlrpc.php
取得多个子域名信息
curl http://site.{one,two,three}.com
如：curl http://{bbs,ftp,nic}.cczu.edu.cn
下载file1.txt-file100.txt
ftp://ftp.numericals.com/file[1-100].txt
ftp://ftp.numericals.com/file[001-100].txt (with leading zeros)
ftp://ftp.letters.com/file[a-z].txt
http://any.org/archive[1996-1999]/vol[1-4]/part{a,b,c}.html
http://www.numericals.com/file[1-100:10].txt 10，20.....txt
关于cookies
The file specified with -b/–cookie is only used as input.No cookies will be stored in the file.
用于读入
To store cookies, use the -c/–cookie-jar option or you could even save the HTTP headers to a file using -D/–dump-header!
curl --cookie "desktop=1;key2=value2" -v -o /dev/null http://jpuyy.com/
curl伪造头信息
curl --header "X-Forwarded-For:8.8.8.8" --header "Accept-Language: en" http://www.jpuyy.com
curl模拟指定浏览器
curl -A "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:25.0) Gecko/20100101 Firefox/25.0" [URL]
curl模拟指定的referer
curl [URL] -e http://www.aavv.com
或使用 --referer
curl使用压缩
curl -I "http://www.hao123.com" --compressed
curl -I -H "Accept-Encoding: gzip, deflate" "http://www.hao123.com"
curl执行post提交
curl http://localhost:8000/wrap -d text=kadj+kdsj+kasdfj+kaslfdj+jkdasljf+skdfjal-yyyyksdjf-kasjd
curl 带账号，basic 认证
-u, --user <user:password>
curl -L -i --user myuser:mypass http://abc.example.com/manage
curl https出现错误
curl -sS https://getcomposer.org/installer
curl: (60) SSL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
More details here: http://curl.haxx.se/docs/sslcerts.html
解决办法：
http://curl.haxx.se/docs/caextract.html 下载 ca-bundle.crt到 /etc/pki/tls/certs/ca-bundle.crt
curl 指定代理服务器
curl http://jpuyy.com -x 211.61.47.19:80
指定 socks5 代理服务器
curl --socks5 127.0.0.1:1081 jpuyy.com/ip.php
更多案例：http://www.thegeekstuff.com/2012/04/curl-examples/
下载 github release tar.gz 包
curl -L -O https://github.com/ansible/ansible/archive/v2.1.0.0-0.2.rc2.tar.gz
获取 token，先准备一个认证文件 auth.json
{
"username":"jpuyy",
"password":"pass"
}
发送请求
curl -v -XPOST info.mysite.com/api/auth/token -d @auth.json -H 'Content-Type: application/json'
根据认证的 token 放在 header 访问
curl info.mysite.com/api/config/web.gui-H "Authorization: FuZzA2In0..."
curl 返回 000 状态码表示超时
curl 测试 websocket
curl -i -N -H "Connection: Upgrade" -H "Upgrade: websocket" -H "Host: echo.websocket.org" -H "Origin: http://www.websocket.org" http://echo.websocket.org
curl 下载断点重连
curl -O -C - http://jpuyy.com/a.txt
curl 自己指定域名的解析
--resolve [DOMAIN]:[PORT]:[IP]
curl https://jpuyy.com --resolve jpuyy.com:443:192.168.1.66
curl 重复请求 100次
curl 'https://jpuyy.com/abc?[1-100]'
