HTTP 303 See Other vs 507 Insufficient Storage
HTTP 303 (See Other) is a 3xx Redirection response, while 507 (Insufficient Storage) is a 5xx Server Error response. 303 indicates that the server is redirecting to a different resource using GET, typically after a POST operation (Post/Redirect/Get pattern). In contrast, 507 means that the server is unable to store the representation needed to complete the request (WebDAV).
Description
The server is redirecting to a different resource using GET, typically after a POST operation (Post/Redirect/Get pattern).
When You See It
After form submissions to prevent resubmission on browser refresh.
How to Fix
Follow the Location header with a GET request. This is intentional — part of the PRG pattern.
Description
The server is unable to store the representation needed to complete the request (WebDAV).
When You See It
When the server runs out of disk space during WebDAV operations.
How to Fix
Free up disk space on the server or increase storage capacity.
Key Differences
303 is a 3xx Redirection response, while 507 is a 5xx Server Error response.
HTTP 303: The server is redirecting to a different resource using GET, typically after a POST operation (Post/Redirect/Get pattern).
HTTP 507: The server is unable to store the representation needed to complete the request (WebDAV).
You encounter 303 when after form submissions to prevent resubmission on browser refresh.
You encounter 507 when when the server runs out of disk space during WebDAV operations.
When to Use Which
For 303 (See Other): Follow the Location header with a GET request. This is intentional — part of the PRG pattern. For 507 (Insufficient Storage): Free up disk space on the server or increase storage capacity.