What's the "Content-Length" field in HTTP header?

Question

What does it mean?

1. Byte count of encoded content string with encoding specified in header.
2. Character count of content string.

Especially in case of Content-Type: application/x-www-form-urlencoded.

Answer 1

It's the number of bytes of data in the body of the request or response. The body is the part that comes after the blank line below the headers.