HTTP 206 Partial Content vs 412 Precondition Failed
HTTP 206 (Partial Content) is a 2xx Success response, while 412 (Precondition Failed) is a 4xx Client Error response. 206 indicates that the server is delivering only part of the resource due to a Range header sent by the client. Used for resumable downloads and video streaming. In contrast, 412 means that one or more conditions in the request headers (If-Match, If-Unmodified-Since) evaluated to false.
Descrição
The server is delivering only part of the resource due to a Range header sent by the client. Used for resumable downloads and video streaming.
Quando você o vê
During video streaming, large file downloads, or when resuming interrupted downloads.
Como corrigir
No fix needed. This is normal behavior for range requests.
Descrição
One or more conditions in the request headers (If-Match, If-Unmodified-Since) evaluated to false.
Quando você o vê
When using conditional requests with ETags and the resource has changed.
Como corrigir
Refresh the ETag/Last-Modified value and retry with updated preconditions.
Diferenças principais
206 is a 2xx Success response, while 412 is a 4xx Client Error response.
HTTP 206: The server is delivering only part of the resource due to a Range header sent by the client. Used for resumable downloads and video streaming.
HTTP 412: One or more conditions in the request headers (If-Match, If-Unmodified-Since) evaluated to false.
You encounter 206 when during video streaming, large file downloads, or when resuming interrupted downloads.
You encounter 412 when when using conditional requests with ETags and the resource has changed.
Quando usar qual
For 206 (Partial Content): No fix needed. This is normal behavior for range requests. For 412 (Precondition Failed): Refresh the ETag/Last-Modified value and retry with updated preconditions.