Curl is a linux utility that is used to make HTTP requests to a given url. It outputs HTTP response to standard output and is actually very easy to use. Here are some examples to show its usage:
curl http://yilmazhuseyin.com/blog/dev/ curl --request GET 'http://yilmazhuseyin.com/blog/dev/'
Both usages are actually the same. However, I try to use second one all the time. With --request (or -X) parameter, we choose our http method to use for our requests. Its values can be GET, POST, DELETE, PUT etc.. If we don't specify this parameter, GET method will be used by default. That is why first version works same as the second one.
curl --request POST 'http://www.somedomain.com/' curl --request DELETE 'http://www.somedomain.com/' curl --request PUT 'http://www.somedomain.com/'
Since we learn how to make POST, GET, PUT, DELETE requests, we can now make same requests with data. In order to send data with those requests, we should use --data parameter. Here are some examples:
::::/bin/bash # send login data with POST request curl --request POST 'http://www.somedomain.com/login/' \ --data 'username=myusername&password=mypassword' # send search data to with get request curl --request GET 'http://www.youtube.com/results?search_query=my_keyword' # send PUT request with data curl --request PUT 'http://www.somedomain.com/rest-api/user/12345/'\ --data 'email@example.com' # same thing but this one get data from a file named data.txt curl --request PUT 'http://www.somedomain.com/rest-api/user/12345/'\ --data @data.txt
Sometimes you need to add HTTP headers to your requests. This is done by --header parameter.
curl --request GET 'http://www.somedomain.com/user/info/' \ --header 'sessionid:1234567890987654321'
Notice that we are using colon(":") to separate header name from its value.
If you need to get HTTP headers with your response, --include parameter can be used
curl --request GET 'http://somedomain.com/' --include
Those examples cover most of the stuff curl is needed for. If you need more functionality, you can use following two commands as a reference
# gives brief description of parameters curl --help # curl manual page man curl
TODO: add cookie parameters