限制要从HTTP响应读取的字节

Question

I need to read responses from user provided URLs

I don't want them to overload my server with links to huge files.

I want to read N bytes max and return an error if there are more bytes to read.

I can read N bytes, but how I detect, that file is incomplete (assuming corner cases when remote file is exactly N bytes long)?

Answer 1

You can check the content length field in request header to get the total file size.