Tag
1xx
4 resources tagged 1xx across methods, status codes, headers, cookies, guides, and glossary.
100 Continue
The server received the request headers and the client should proceed to send the body. Learn when and how to use 100 Continue for efficient large uploads.
101 Switching Protocols
The server is switching to a different protocol as requested by the client. Learn about WebSocket upgrades and protocol negotiation.
102 Processing
The server has accepted the request and is processing it, but no response is available yet. Learn about this WebDAV status code for long-running operations.
103 Early Hints
The server sends preliminary response headers to help the client start preloading resources. Learn how 103 Early Hints improves page load performance.