- This tutorial gives a brief overview of testing a REST API using curl. Curl is a command-line tool for transferring data, and it supports about 22 protocols, including HTTP. This combination makes it a very good ad-hoc tool for testing our REST services.
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- Curl is a tool to transfer data from or to a server, using one of the supported protocols (DICT, FILE, FTP, FTPS, GOPHER, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET and TFTP). The command is designed to work without user interaction.
I am using cURL command line utility to send HTTP POST to a web service. I want to include a file's contents as the body entity of the POST. I have tried using -d. If you want big arms, do a biceps curl. If you want even bigger arms, do variations of the biceps curl. Small tweaks—something as simple as changing the wrist position or source of resistance—allow.
In this article, we’re going to discuss how to use curl
to interact with RESTful APIs. curl
is a command-line utility that can be used to send requests to an API.
API requests are made up of four different parts:
- The endpoint. This is the URL which we send requests to.
- The HTTP method. The action we want to perform. The most common methods are
GET
POST
PUT
DELETE
andPATCH
- The headers. The headers which we want to send along with our request, e.g. authorization header.
- The body. The data we want to send to the api.
Curl Body Into Ball To Protect From Attack
curl Syntax
The syntax for the curl
command is:
The options we will cover in this post are:
-X
or--request
- HTTP method to be used-i
or--include
- Include the response headers-d
or--data
- The data to be sent to the API-H
or--header
- Any additional headers to be sent
HTTP GET
The GET method is used to fetch a resource from a server. In curl
, the GET method is the default method, so we don’t need to specify it.
Example:
GET With Query Parameters
We can also send query parameters along with the curl
GET request.
Example:
HTTP POST
The POST method is used to create a resource on the server.
To send a curl
POST request we use the option -X POST
.
POST Form Data
Example:
By default, curl
uses Content-Type: application/x-www-form-urlencoded
as the Content-Type
header, so we don’t need to specify it when sending form data.
POST JSON
To POST a JSON by curl
we have to specify the Content-Type
as application/json
.
Example:
HTTP PUT
The PUT method is used to update or replace a resource on the server. It replaces all data of the specified resource with the supplied request data.
To send a curl
PUT request we use the option -X PUT
.
Example:
The above PUT request will replace our previously created post with “New post title” and “New post body”.
HTTP PATCH
The PATCH method is used to make partial updates to the resource on the server.
To send a curl
PATCH request we use the option -X PATCH
.
Curl Body Shop
Example:
Notice how we are only sending the body with “Updated post content” as we are doing a partial update.
HTTP DELETE
Gigabyte g41 driver. The DELETE method is used to remove the specified resource from the server.
To send a curl
DELETE request we use the option -X DELETE
.
Authentication
Sometimes an API endpoint has restricted access and will only serve requests to authenticated and authorized users. For these requests, we have to provide an access token in the header of the request.
To send a curl
header, we use: -H
option.
Curl Body Form Data
The following request sends POST request with a bearer token in the header:
Conclusion
In this post we learned how to send HTTP requests (GET, POST, PUT, PATCH and DELETE) to an API using curl commands.