Content-Length header 是压缩字节还是未压缩字节的字节大小？
Is the Content-Length header the size in bytes of the compressed or uncompressed bytes?
我正在 node.js 中实现静态文件服务。假设我要发送一个名为 party-time.txt 的文件，它是：
100 bytes uncompressed
70 bytes gzipped
如果我发送压缩文件，Content-Length header 应该是 100 还是 70？
请看specification。它明确指出：
Applications SHOULD use this field to indicate the transfer-length of
the message-body, unless this is prohibited by the rules in section
4.4.
深入挖掘：
The message-body (if any) of an HTTP message is used to carry the
entity-body associated with the request or response. The message-body
differs from the entity-body only when a transfer-coding has been
applied, as indicated by the Transfer-Encoding header field (...)
所以，Content-length就是压缩后的body大小
我正在 node.js 中实现静态文件服务。假设我要发送一个名为 party-time.txt 的文件，它是：
100 bytes uncompressed
70 bytes gzipped
如果我发送压缩文件，Content-Length header 应该是 100 还是 70？
请看specification。它明确指出：
Applications SHOULD use this field to indicate the transfer-length of the message-body, unless this is prohibited by the rules in section 4.4.
深入挖掘：
The message-body (if any) of an HTTP message is used to carry the
entity-body associated with the request or response. The message-body differs from the entity-body only when a transfer-coding has been
applied, as indicated by the Transfer-Encoding header field (...)
所以，Content-length就是压缩后的body大小