On Aug 29, 2011, at 3:52 PM, Godmar Back wrote: > Earlier versions of IE were known to sometimes disregard the Content-Type > (which you set correctly to application/pdf) and look at the suffix of the > URL instead. For instance, they would render HTML if you served a .html as > text/plain, etc. > > You may try creating URLs that end with .pdf > > Separately, you're not sending a Content-Length header: > > HTTP request sent, awaiting response... > HTTP/1.1 200 OK > Server: Apache-Coyote/1.1 > Pragma: No-cache > Cache-Control: no-cache > Expires: Wed, 31 Dec 1969 19:00:00 EST > Content-Type: application/pdf > Date: Mon, 29 Aug 2011 19:47:27 GMT > Connection: close > Length: unspecified [application/pdf] > > which disregards RFC 2616, > http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.13 RFC2616 says 'SHOULD' for that section. HTTP/1.1 clients *must* support chunked encoding: http://en.wikipedia.org/wiki/Chunked_transfer_encoding (which is why any time I write an HTTP client, I always claim to be HTTP/1.0, so I don't have to support it) If the data's stored on disk compressed, and being decompressed on the fly, it's pretty typical to not send Content-Length. (although, you could argue that they should save it when storing the value, so it's available when serving without needing to decompress first). -Joe