I am writing some Elisp code that downloads files using url-copy-file, and most of the time it works fine, but sometimes the contents of the file end up being the http headers, e.g. the downloaded file has the following contents:
HTTP/1.1 200 OK Server: GitHub.com Date: Thu, 14 Nov 2013 20:54:41 GMT Content-Type: text/plain; charset=utf-8 Transfer-Encoding: chunked Status: 200 OK Strict-Transport-Security: max-age=31536000 X-XSS-Protection: 1; mode=block X-Content-Type-Options: nosniff X-UA-Compatible: chrome=1 Access-Control-Allow-Origin: https://render.github.com
Or sometimes the following is appended to the end of an otherwise correctly-downloaded file:
0 - Peer has closed the GnuTLS connection
However, when these things occur, the function seems to return just fine, so there is no way for me to verify that the file has really been downloaded. Is there any more reliable way to download a file in elisp (without shelling out to wget/curl/whatever)?
As recommended, I have reported this as a bug: lists.gnu.org/archive/html/bug-gnu-emacs/2013-11/msg00758.html