What does HTTP status 206 (Partial Content) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: HTTP 206 returns only the selected byte range or ranges of a representation.

Could be also:
Constant	Type	OS
ERROR_FILENAME_EXCED_RANGE	Win32 error	Windows
DRIVER_UNLOADED_WITHOUT_CANCELLING_PENDING_OPERATIONS	BugCheck Code	Windows

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HTTP_STATUS_RESET_CONTENT	HTTP_STATUS_MULTI

HTTP_STATUS_PARTIAL_CONTENT

A 206 response is produced after a valid Range request. The Content-Range header identifies the returned interval and the complete representation length when known.

Download clients should combine ranges only when validators such as ETag or Last-Modified show that the representation has not changed between requests.

Servers can return a single range with a Content-Range header or multiple ranges using a multipart representation. A client resuming a download should validate that the stored bytes still belong to the same representation. If the validator changed, combining old and new ranges can silently corrupt the reconstructed file and should be avoided.

RFC 9110: HTTP Semantics

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