DELETE for removing resources in Rest API - Step-by-Step Execution

Concept Flow - DELETE for removing resources

Client sends DELETE request

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Server receives request

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Server checks resource exists

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Server deletes resource

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Server sends 200 OK or 204 No Content

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Client receives confirmation

The client sends a DELETE request to remove a resource. The server checks if the resource exists, deletes it if found, and sends a confirmation response.

Execution Sample

Rest API

DELETE /items/123 HTTP/1.1
Host: example.com

Response:
HTTP/1.1 204 No Content

Client requests deletion of item 123; server confirms deletion with 204 No Content.

Execution Table

Step	Action	Resource Exists?	Server Response	Client Outcome
1	Client sends DELETE /items/123	Unknown	Waiting	Waiting
2	Server receives DELETE request	Check resource 123	Checking	Waiting
3	Resource 123 found	Yes	Delete resource	Waiting
4	Resource 123 deleted	Yes	Send 204 No Content	Waiting
5	Client receives response	N/A	204 No Content	Deletion confirmed
6	Client tries to GET /items/123	Check resource 123	Not found	Resource missing

💡 Resource 123 deleted successfully; server responds with 204 No Content.

Variable Tracker

Variable	Start	After Step 2	After Step 3	After Step 4	Final
resource_exists	Unknown	Checking	Yes	Deleted	Deleted
server_response	None	Waiting	Deleting	204 No Content	204 No Content
client_state	Idle	Waiting	Waiting	Waiting	Deletion confirmed

Key Moments - 3 Insights

Why does the server send 204 No Content instead of 200 OK?

204 No Content means the deletion was successful but there is no message body to send back. See execution_table row 4 where server sends 204 after deleting.

What happens if the resource does not exist?

The server sends a 404 Not Found response. This is shown in the concept_flow where if resource check is No, server sends 404.

Does the client get any data back after deletion?

No, the 204 response has no content. The client only gets confirmation the resource was deleted, as shown in execution_table row 5.

Visual Quiz - 3 Questions

Look at the execution_table, what is the server response immediately after deleting the resource?

A 404 Not Found

B 200 OK

C 204 No Content

D 500 Internal Server Error

💡 Hint

Check execution_table row 4 under 'Server Response'

At which step does the server confirm the resource exists before deleting?

A Step 1

B Step 3

C Step 2

D Step 5

💡 Hint

Look at execution_table row 3 where resource existence is confirmed

If the resource did not exist, what would the server response be?

A 404 Not Found

B 200 OK

C 204 No Content

D 301 Moved Permanently

💡 Hint

Refer to concept_flow branch when resource check is No

Concept Snapshot

DELETE request removes a resource at the server.
Client sends DELETE /resource/id.
Server checks if resource exists.
If yes, deletes and sends 204 No Content.
If no, sends 404 Not Found.
Client receives confirmation with no content.

Full Transcript

When a client wants to remove something on a server, it sends a DELETE request with the resource's address. The server looks to see if that resource exists. If it does, the server deletes it and sends back a 204 No Content response, meaning success but no extra data. If the resource is missing, the server replies with 404 Not Found. The client then knows if the deletion worked or if the resource was not there. This process helps keep data clean and confirms actions clearly.