Curl POST JSON command examples- Guidelines

Today in this article, we shall see how to execute the Curl POST JSON command.

CURL is a tool to transfer data from or to a server, using different types of protocol protocols.

Today we shall cover below basic scenarios of using curl commands,

Curl POST JSON with string request

Command :

Post example with string object as request body

curl -X POST "your-post-url" -H "accept: text/plain" -H "Content-Type: application/json" -d "\"your string request data\""

In the above command,

-X —-> The HTTP verb indicating operation is GET, POST, PUT or DELETE, etc

–d or --data  —-> the data you want to send.

Example 1

Above we are passing String object as a request body.

curl -X POST "https://localhost:44341/api/Values" -H "accept: text/plain" -H "Content-Type: application/json" -d "\"kjhlkjlj\""

Curl POST JSON request

Example2

curl -X POST "https://localhost:44341/api/Values" -H "accept: text/plain" -H "Content-Type: application/json" -d '{"key1":"value1", "key2":"value2"}'

Above we are passing JSON data as the request body parameter.

The response header is as below,

 access-control-allow-origin: * 
 content-type: text/plain; charset=utf-8 
 date: Fri, 24 Jan 2020 00:30:12 GMT 
 server: Microsoft-IIS/10.0 
 transfer-encoding: chunked 
 x-powered-by: ASP.NET 

CURL POST JSON using Basic Authentication

Below is a simple command which you can use against API or service which expects Basic Authentication credentials.

Command:

curl -X POST "<URL>" -H "accept: text/plain" -H "Authorization: Basic <TOKEN>"

Example:

curl -X POST "https://localhost:44378/Accounts" -H "accept: text/plain" -H "Authorization: Basic ZGZzZGY6c2Rmcw=="

I have executed the commands using Git Bash shell,

One can also pass username and password in the format -u username: password which gets translated to Bas64 string.

CURL JWT Bearer Authentication

Below is a basic command which you can run use against API or service which expects JWT Bearer authentication credential.

Command:

curl -X POST "https://localhost:44341/api/Values" -H "accept: text/plain" -H "Authorization: Bearer <token>

Example:

curl -X POST "https://localhost:44341/api/Values" -H "accept: text/plain" -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE1Nzk4MzkzODksImlzcyI6Imh0dHBzOi8vbG9jYWxob3N0OjQ0MzQxIiwiYXVkIjoiaHR0cHM6Ly9sb2NhbGhvc3Q6NDQzNDEifQ.6UTixm8bekorxcw0lL8x-mBkNVaIK003LzMtkuIhasZ8"

References:

• Testing REST API/Services using CURL Command Line

• RESTFul API Naming Conventions

Do you have any comments or ideas or any better suggestions to share?

Please sound off your comments below.

Happy Coding !!

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