return a secret function used for basic authentication, this function use sha1 hash.

Check a filename's extension and determine if it can be compressed.

Determine a data stream's content type, like: text/plain; charset=utf-8 Inspired by go's serveContent() in net/http package.

ErrorHandler401 return a function for writing 401 error message to http.ResponseWriter.

Determine a file's content type, like: text/plain; charset=utf-8 Inspired by go's serveContent() in net/http package.

Get client IP.

Wrap a handler to a gzip handler.

Make a new response sniffer, if recordBody is true, record response body to Body, this will cost more memory.

Get a value of key in query string.

RedirectToHTTPS redirect a request to a corresponding https url.

Create a function to generate random request ids.

Use golang.org/x/net/proxy package to make a socks5 client.

Write download header to the response writer.

ResponseSniffer is used to record http response body, status code and number of bytes write to the response writer.

A string for identify each http request.