对于"User-Agent", "Cookie", "Host"这类标准的HTTP头部字段，通常会有另外一种设置方法。curl命令提供了特定的选项来对这些头部字段进行设置：

• -A (or --user-agent): 设置 "User-Agent" 字段.
• -b (or --cookie): 设置 "Cookie" 字段.
• -e (or --referer): 设置 "Referer" 字段.

例如，以下两个命令是等效的。这两个命令同样都对HTTP头的"User-Agent"字符串进行了更改。

1. $ curl -H "User-Agent: my browser" http://cnn.com
2. $ curl -A "my browser" http://cnn.com

wget是另外一个类似于curl，可以用来获取URL的命令行工具。并且wget也一样允许你使用一个自定义的HTTP头。点击 查看wget命令的详细信息。

 

GET:

with JSON:

curl -i -H "Accept: application/json" -H "Content-Type: application/json" http://hostname/resource

with XML:

curl -H "Accept: application/xml" -H "Content-Type: application/xml" -X GET http://hostname/resource

POST:

For posting data:

curl --data "param1=value1&param2=value2" http://hostname/resource

For file upload:

curl --form "fileupload=@filename.txt" http://hostname/resource

RESTful HTTP Post:

curl -X POST -d @filename http://hostname/resource

For logging into a site (auth):

curl -d "username=admin&password=admin&submit=Login" --dump-header headers http://localhost/Login curl -L -b headers

 

-H/--header <header> (HTTP) Extra header to use when getting a web page. You may specify any number of extra headers. Note that if you should add a custom header that has the same name as one of the internal ones curl would use, your externally set header will be used instead of the internal one. This allows you to make even trickier stuff than curl would normally do. You should not replace internally set headers without knowing perfectly well what you're doing. Remove an internal header by giving a replacement without content on the right side of the colon, as in: -H "Host:". curl will make sure that each header you add/replace get sent with the proper end of line marker, you should thus not add that as a part of the header content: do not add newlines or carriage returns they will only mess things up for you. See also the -A/--user-agent and -e/--referer options. This option can be used multiple times to add/replace/remove multi- ple headers.

Example:

curl --header "X-MyHeader: 123" www.google.com

You can see the request that curl sent by adding the -v option.