HTTP 100 Continue vs 411 Length Required
HTTP 100 (Continue) is a 1xx Informational response, while 411 (Length Required) is a 4xx Client Error response. 100 indicates that the server has received the request headers and the client should proceed to send the request body. This lets the client know it can continue with the request or abort if the headers were rejected. In contrast, 411 means that the server refuses to accept the request without a Content-Length header.
説明
The server has received the request headers and the client should proceed to send the request body. This lets the client know it can continue with the request or abort if the headers were rejected.
このコードが表示される場合
When a client sends an Expect: 100-continue header, the server responds with 100 before the client sends the body.
解決方法
This is an interim response — no fix needed. The client should continue sending the request body.
説明
The server refuses to accept the request without a Content-Length header.
このコードが表示される場合
When sending a request body without specifying Content-Length.
解決方法
Include a Content-Length header in your request.
主な違い
100 is a 1xx Informational response, while 411 is a 4xx Client Error response.
HTTP 100: The server has received the request headers and the client should proceed to send the request body. This lets the client know it can continue with the request or abort if the headers were rejected.
HTTP 411: The server refuses to accept the request without a Content-Length header.
You encounter 100 when when a client sends an Expect: 100-continue header, the server responds with 100 before the client sends the body.
You encounter 411 when when sending a request body without specifying Content-Length.
どちらをいつ使うか
For 100 (Continue): This is an interim response — no fix needed. The client should continue sending the request body. For 411 (Length Required): Include a Content-Length header in your request.