How to perform a POST request using Curl
Curl is a command-line utility that allows users to create network requests. Curl is accessible on Windows, Linux, and Mac, making it the go-to choice for developers across all platforms.
We can make POST requests with varying levels of detail. Some sample POST requests are given below:
Making a simple POST request
To make a basic POST request using curl, type the following command on your command-line:
curl -X POST https://example.com/
The -X flag specifies a custom request method to use when communicating with the HTTP server. By default, the GET method is used unless some other method is specified.
Sending additional fields with a POST request
Users can send data with the POST request using the -d flag. The following POST request sends a user and a pass field along with their corresponding values.
curl -d "user=user1&pass=abcd" -X POST https://example.com/login
POSTing with curl’s -d option will include a default header that looks like: Content-Type: application/x-www-form-urlencoded.
Specifying the Content-Type in POST request
The -H flag can be used to send a specific data type or header with curl. The following command sends a JSON object with the request.
curl -d '{json}' -H 'Content-Type: application/json' https://example.com/login
Sending a file using curl
We can also send complete files in the command-line using curl. The command used to do this is:
curl --form "fileupload=@my-file.txt" https://example.com/resource.cgi
Code example
We used the POST request using the curl command. We inserted a new item using the POST request and received an object with a new ID.
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