IIS - ColdFusion, chunked transfer error

[sebt81]

Hi,

I have a ColdFusion page which is receiving urlencoded form variables via an
http post from another server.
As you may know, with the http protocol, a server can split large requests
into multiple chunks and issue a "Transfer-Encoding: chunked" header. When the
form post is being sent from certain mobile (cell/PDA) devices, the threshold
at which the server decides to split an http request into multiple chunks is
very low. In the mobile world this is a reasonably well-known issue in
client-server apps, however I have not dealt with this issue on a coldfusion
server before.

What I have found using a tcp/ip packet monitor is that IIS on the destination
server is acknowledging all the chunks as being part of the same connection.
However after using an automated dump of headers from GetHttpRequestData(), I
determined that the coldfusion page only ever sees the first chunk. This
suggests that IIS is not managing to combine the chunks back into a single
request correctly, or if it is, then it is not passing it onto the ColdFusion
server correctly.

Does anybody have any experience of this, or can at least confirm that
ColdFusion server can process chunked http requests?

Thanks in advance,
SebT

[sebt81]

Looks like this is definitely an issue between IIS and CF, rather than an IIS
configuration problem. I was able to write an ASP page on the same server which
correctly received all the form variables from a multi-chunked request. So in
my case I can re-post the request onto the CF app from the ASP page so that my
application works, however this doesn't solve the underlying error that happens
with the coldfusion application server and IIS.

S.