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What is Curl?
The Curl is a command-line utility for transmitting data to or from a remote server using one of the supported protocols. A developer uses Curl to test APIs, send requests to the server, and view server response headers. Curl supports over 25+ protocols, including HTTP, HTTPS, FTPS, FTP, and SFTP, and has built-in support for SSL certificates, web form submission, supports HTTP POST, HTTP PUT, file upload, HTTP Cookies, user authentication, and more.
What is HTTP POST request method?
The HTTP POST method is among the most widely used HTTP methods. The POST requests the web server to receive and process the data enclosed in the body message. The POST method is commonly used for uploading files and submitting HTML forms.
Curl POST request syntax
The following is an example of the syntax for a POST request with a message body:
- -X: the parameter specifies which HTTP request method is to be used for communication
- -H: the content-type header indicates the type of data in the request body
- -d: the parameter specifies the data to be sent to the server as part of the POST message
How to send data with different content-type using the curl -d command?
To send data with a different content type using the curl -d command, pass the correct Content-Type header with the -H command line argument. The following is an example of sending a Curl request with a Content-Type header: