HTTP headers
Content-Length HTTP Header Meaning
Content-Length gives the body size in bytes.
Meaning
The sender is declaring how many bytes are in the message body.
Where it appears
Clients and servers include it when the body length is known before sending.
What to check
Check for mismatches between declared length and actual body, especially around proxies and uploads.
Example
Content-Length: 348References
- Registry
- IANA HTTP Field Name Registry
- Guide
- MDN Content-Length