HTTP PUT Request for File Uploads is returning a response header with content-length = 0

Question

After upgrading from CF9 to Coldfusion 10, I'm running into an odd issue, with `cURL` calls to a webservice that used to work.
We are using an HTTP PUT Request with multipart="no" so that the request header content is the file itself, now the data is being sent properly in the content but it has a ~8k limit. This is fine for smaller files but some files are 60kb etc.
Errors are odd too, near the 8KB limit we get a bad gateway error 502, and above that the webpage errors with a connection reset.
It works fine with multipart="yes", but in a PUT request the file's data isn't even sent since it's looking for `httpparam formField` , the content-length from the target page's Headers show a content-length of 0 which causes `cURL` to fail with an error (56): http://curl.haxx.se/docs/manpage.html
Here's example code to reproduce:
<cfset sFilename = "C:\999\test4.txt">
<cffile action="readBinary" file="#sFilename#" variable="fileRead">
<cfset oFileInfo = GetFileInfo("#sFilename#")>
<cfhttp           url="localhost/Clarence/diff_elt_test_output.cfm"
                              method="PUT"
                              username="******"
                              password="******"
                              multipart="yes"
                              result="oHttp">
          <cfhttpparam type="header" name="Content-Type" value="text/plain" />
          <cfhttpparam type="header" name="Content-Length" value="#oFileInfo.Size#" />
          <cfhttpparam type="body" value="#fileRead#"/>
</cfhttp>
<cfdump var="#oHttp#">
Dumping the response via GetHttpRequestData() shows that the header's content-length = 0 and content is blank.
Whereas POST requests work fine, cURL has a -F form option which is our fallback but a solution to this would be great.
Here's what I've tried:
1. Changing CF post request limit sizes (64MB+)
2. Changing IIS config web/webserver http runtime and security.request filtering request limits to much higher values
3. AJP Connector between IIS and Tomcat has a default 8KB header limit, I changed that to 64k on both sides, still nothing
Also am I missing something fundamental here? I thought at the network layer a packet is split up and rejoined, so large content in a http request body should work, what's wrong with Coldfusion 10?

Answer 1

I am familiar with java.net package and know how to
Read and Write Streams.
However, what I do not know is what string
represntation of PUT or POST resquests is?It's HttpURLConnection.setRequestMethod("PUT") or ("POST").
Also you have to setDoOutput(true).
Then you set the content type, possibly encode the input, set the content length, and write the file data to the stream.
Using a Jakarta package may be easier, however.