HTTP 203 Non-Authoritative Information vs 423 Locked
HTTP 203 (Non-Authoritative Information) is a 2xx Success response, while 423 (Locked) is a 4xx Client Error response. 203 indicates that the response payload has been modified by a transforming proxy from the origin server's 200 response. In contrast, 423 means that the resource is locked and cannot be modified (WebDAV).
Description
The response payload has been modified by a transforming proxy from the origin server's 200 response.
When You See It
When a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
How to Fix
Check if a proxy is modifying the response. Access the origin directly if you need the original content.
Description
The resource is locked and cannot be modified (WebDAV).
When You See It
When trying to edit a file that another user has locked in WebDAV.
How to Fix
Wait for the lock to be released, or request the lock owner to unlock it.
Key Differences
203 is a 2xx Success response, while 423 is a 4xx Client Error response.
HTTP 203: The response payload has been modified by a transforming proxy from the origin server's 200 response.
HTTP 423: The resource is locked and cannot be modified (WebDAV).
You encounter 203 when when a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
You encounter 423 when when trying to edit a file that another user has locked in WebDAV.
When to Use Which
For 203 (Non-Authoritative Information): Check if a proxy is modifying the response. Access the origin directly if you need the original content. For 423 (Locked): Wait for the lock to be released, or request the lock owner to unlock it.