HTTP 101 Switching Protocols vs 507 Insufficient Storage
HTTP 101 (Switching Protocols) is a 1xx Informational response, while 507 (Insufficient Storage) is a 5xx Server Error response. 101 indicates that the server understands the Upgrade header field request and indicates which protocol it is switching to. In contrast, 507 means that the server is unable to store the representation needed to complete the request (WebDAV).
Description
The server understands the Upgrade header field request and indicates which protocol it is switching to.
When You See It
When upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
How to Fix
This is normal behavior during protocol upgrades. Ensure your client supports the target protocol.
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
101 is a 1xx Informational response, while 507 is a 5xx Server Error response.
HTTP 101: The server understands the Upgrade header field request and indicates which protocol it is switching to.
HTTP 507: The server is unable to store the representation needed to complete the request (WebDAV).
You encounter 101 when when upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
You encounter 507 when when the server runs out of disk space during WebDAV operations.
When to Use Which
For 101 (Switching Protocols): This is normal behavior during protocol upgrades. Ensure your client supports the target protocol. For 507 (Insufficient Storage): Free up disk space on the server or increase storage capacity.