What is the difference between PUT, POST and PATCH? Ask Question

Difference between PUT, POST, GET, DELETE and PATCH in HTTP Verbs:

The most commonly used HTTP verbs POST, GET, PUT, DELETE are similar to CRUD (Create, Read, Update and Delete) operations in database. We specify these HTTP verbs in the capital case. So, the below is the comparison between them.

1. Create - POST
2. Read - GET
3. Update - PUT
4. Delete - DELETE

PATCH: Submits a partial modification to a resource. If you only need to update one field for the resource, you may want to use the PATCH method.

Note:
Since POST, PUT, DELETE modifies the content, the tests with Fiddler for the below url just mimicks the updations. It doesn't delete or modify actually. We can just see the status codes to check whether insertions, updations, deletions occur.

URL: http://jsonplaceholder.typicode.com/posts/

1. GET:

GET is the simplest type of HTTP request method; the one that browsers use each time you click a link or type a URL into the address bar. It instructs the server to transmit the data identified by the URL to the client. Data should never be modified on the server side as a result of a GET request. In this sense, a GET request is read-only.

Checking with Fiddler or PostMan: We can use Fiddler for checking the response. Open Fiddler and select the Compose tab. Specify the verb and url as shown below and click Execute to check the response.

Verb: GET

url: http://jsonplaceholder.typicode.com/posts/

Response: You will get the response as:

"userId": 1,  "id": 1,  "title": "sunt aut...",  "body": "quia et suscipit..."

In the “happy” (or non-error) path, GET returns a representation in XML or JSON and an HTTP response code of 200 (OK). In an error case, it most often returns a 404 (NOT FOUND) or 400 (BAD REQUEST).

2) POST:

The POST verb is mostly utilized to create new resources. In particular, it's used to create subordinate resources. That is, subordinate to some other (e.g. parent) resource.

On successful creation, return HTTP status 201, returning a Location header with a link to the newly-created resource with the 201 HTTP status.

Checking with Fiddler or PostMan: We can use Fiddler for checking the response. Open Fiddler and select the Compose tab. Specify the verb and url as shown below and click Execute to check the response.

Verb: POST

url: http://jsonplaceholder.typicode.com/posts/

Request Body:

data: {
   title: 'foo',
   body: 'bar',
   userId: 1000,
   Id : 1000
}

data: {
   title: 'foo',
   body: 'bar',
   userId: 1,
   Id : 1
}

{ "first": "Nazmul", "last": "hasan" }