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201 What is a Conditional Rule?

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The 201-status code is part of the HTTP response status code and indicates that the request was successfully processed and a new result was created and is commonly used in RESTful APIs when creating a new object with a POST request.
201 Highlights of the condition code:
1. What it means:
o The 201-status code indicates “built”. Indicates that the request was completed and one or more additional actions were taken as a result.
2. Theme of the Place:
o The response must include the Location header of the URL of the newly created object. This lets the client know where the new object is.
3. Body of actions:
o If a Location header is required, the server can also include a copy of the updated resource in the response body, usually in JSON or XML format
Sample Experiments:
Events:
The client sends a POST request to create a new user on the server.
Request:
http
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POST /users HTTP/1.1
Host: example.com
Content-Type: application/json

{
“username”: “newuser”,
“email”: “newuser@example.com”
}
Response:
http
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HTTP/1.1 201 Created
Location: /users/12345
Content-Type: application/json

{
“id”: 12345,
“username”: “newuser”,
“email”: “newuser@example.com”
}

In this example:
• The client requests to create a new user by sending a POST request to /users.
• The server processes the request and creates a new user resource.
• The server responds with a 201 status code, indicating that the resource was successfully created.
• The location header provides the URL for a new user object (/users/12345).
• The response body contains the newly created user information.
201 When to use a status code:
• Resource creation: Any time a request successfully generates new resources, such as creating a new user, object, or input to the system.
• APIs: In RESTful APIs, a 201-status code is standard for POST requests that result in new creations.
• Database Inserts: If an operation inserts a new record into the database and the inserts succeed.
Best Practices:
1. Add a themed location:
o Always include the Location header in the response when providing the client with the URI of the newly created object.
2. Body of actions:
o Optionally, include a picture of the created object in the response group to provide the client with immediate information about the new object.
3. How to effectively use APIs:
o Only use the 201 status code for successful build operations on your API endpoints to maintain consistency and clarity.

The 201-status code is an integral part of the HTTP protocol used to signal a successful update. Ensuring that clients are notified of new resource spaces created and can be accessed immediately is especially important in RESTful APIs. The proper use of the 201-status code and its associated headers contributes to the clarity and usability of the API.
What is the difference between a 201-status code and a 200-status code?
Both status codes 201 and 200 are valid HTTP response status codes, but indicate different successes and are used in different contexts.
201 Status Rule: Created
• Meaning: A 201-status code indicates that a request completed successfully and resulted in a new object.
• Repeated use: This status code is typically used in response to POST requests, where the server is a new object.
• Location Header: The response must include the location header of the URL of the newly created object.
• Response body: The server can include a copy of the updated object in the response body.
Example:
POST /users HTTP/1.1 Host: example.com Content-Type: application/json {
“username”: “newuser”, “email”: newuser@example.com
}
Response:
HTTP/1.1 201 Created Location: /users/12345 Content-Type: application/json {
“id”: 12345, “username”: “newuser”, “email”: “newuser@example.com”
}
In this example, the server has successfully created a new user and provided the location of the new resource in the Location header.
200 Status code: OK
• Meaning: The 200-status code indicates that the server has processed the request successfully and that the requested resource is being returned.
• Typical Usage: This status code is typically used for successful GET requests where the server returns the requested resource, but can also be used for successful POST, PUT, or DELETE requests if not created any other resource a
• Response body: A response class is usually a requested object or a validation of an action.
The main differences are:
1. Objectives:
o 201 Created: Indicates that the new object was successfully created.
o 200 OK: Indicates that the request was successful and the server returned the requested resource or confirmation.
2. Common terms:
o 201 Created: Used for POST requests that create a new object.
o 200 OK: Used for GET requests to return the requested object, and for POST, PUT, and DELETE requests to confirm that the operation succeeded when no new objects were created.
3. Title:
o 201 Created: A Location header identifying the URL of the updated object must be included.
o 200 OK: Normally not included in a Location header, because it returns an existing item or highlight.
4. Body of actions:
o 201 Created: May include an image of a newly created object.
o 200 OK: Normally contains a requested item or a confirmation message.
Understanding these differences helps choose the right status codes for different situations in web development, ensuring clarity and correctness in API responses.

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