HTTP 100 Continue vs 406 Not Acceptable
HTTP 100 (Continue) is a 1xx Informational response, while 406 (Not Acceptable) 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, 406 means that the server cannot produce a response matching the Accept headers sent by the client.
Descrição
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.
Quando você o vê
When a client sends an Expect: 100-continue header, the server responds with 100 before the client sends the body.
Como corrigir
This is an interim response — no fix needed. The client should continue sending the request body.
Descrição
The server cannot produce a response matching the Accept headers sent by the client.
Quando você o vê
When requesting a content type the server doesn't support (e.g., Accept: application/xml when only JSON is available).
Como corrigir
Adjust the Accept header to a format the server supports.
Diferenças principais
100 is a 1xx Informational response, while 406 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 406: The server cannot produce a response matching the Accept headers sent by the client.
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 406 when when requesting a content type the server doesn't support (e.g., Accept: application/xml when only JSON is available).
Quando usar qual
For 100 (Continue): This is an interim response — no fix needed. The client should continue sending the request body. For 406 (Not Acceptable): Adjust the Accept header to a format the server supports.