content-length
Technical computing term referring to the Content-Length header field in HTTP or similar protocols, indicating the size of the message body in bytes.
If the Content-Length of an HTTP request is not set correctly, the server may return an error.
Compound of 内容 (ないよう, 'content') and 長 (ちょう, 'length'), likely a direct calque of the English computing term 'content-length'.