What are the HTTP methods used in REST?

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In REST architecture, HTTP methods define the type of operation performed on a resource. Each method maps to a specific CRUD (Create, Read, Update, Delete) action. The most common HTTP methods in REST are:

1. GET

• Used to retrieve a resource.

• Safe and idempotent (does not change server state).

• Example: GET /api/users/1 → Fetch user with ID=1.

2. POST

• Used to create a new resource on the server.

• Request body contains the resource data.

• Example: POST /api/users with JSON data → Creates a new user.

3. PUT

• Used to update an existing resource (complete replacement).

• Requires the full updated resource data in the request body.

• Idempotent (multiple calls produce the same result).

• Example: PUT /api/users/1 → Update user with ID=1.

4. PATCH

• Used to partially update a resource.

• Unlike PUT, only the fields to be updated are sent.

• Example: PATCH /api/users/1 with { "email": "new@mail.com" }.

5. DELETE

• Used to remove a resource from the server.

• Idempotent (deleting the same resource multiple times gives the same outcome).

• Example: DELETE /api/users/1 → Deletes user with ID=1.

6. OPTIONS

• Returns the supported HTTP methods for a resource.

• Useful for CORS (Cross-Origin Resource Sharing) preflight checks.

7. HEAD

• Similar to GET but retrieves only the headers, not the body.

• Useful for checking if a resource exists or for metadata.

👉 In summary, RESTful APIs use HTTP methods to perform operations:

• GET (Read)

• POST (Create)

• PUT/PATCH (Update)

• DELETE (Remove)

• OPTIONS, HEAD (Supporting operations)

Read more  :

What is HQL?

What is REST architecture?

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