What are the things present in the HTTP response:
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An HTTP response typically consists of several components or elements that provide information about the server's response to an HTTP request. These components include:
1. Status Line:
- The first line of an HTTP response is the status line, which includes the HTTP version, a status code, and a brief reason phrase.
- Example: HTTP/1.1 200 OK
2. Headers:
- HTTP response headers provide additional metadata about the response or instructions for the client on how to handle the response. Common headers include:
- Content-Type: Specifies the type of content in the response (e.g., text/html, application/json).
- Content-Length: Indicates the size of the response body in bytes.
- Location: Used for redirection (e.g., in a 3xx response).
- Cache-Control: Provides caching directives.
- Server: Identifies the software and version running on the server.
- Various other headers for cookies, authentication, and more.
3. Response Body:
- The response body contains the actual data or content being sent back by the server. This content could be HTML for web pages, JSON for API responses, images, or any other type of data.
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- The presence and format of the response body depend on the request and the server's response.
4. Status Codes:
- The status code in the status line provides information about the result of the request. Common status codes include:
- 200 OK: The request was successful, and the response body contains the requested data.
- 201 Created: The request resulted in the creation of a new resource.
- 204 No Content: The request was successful, but there is no response body.
- 301 Moved Permanently: The requested resource has been permanently moved to a new URL.
- 404 Not Found: The requested resource could not be found on the server.
- 500 Internal Server Error: An error occurred on the server.
5. Response Cookies:
- If the server wants to set cookies on the client for session management or other purposes, it includes one or more Set-Cookie headers in the response.
6. Additional Information (Optional):
- Depending on the server and the specific response, additional information or custom headers may be included to convey specific details about the response or to instruct the client on how to handle it.
HTTP responses are a fundamental part of the HTTP protocol, enabling the exchange of data between clients (e.g., web browsers or API consumers) and servers.