Hello Nick,
this description sounds more like a problem with connection re-use
than connection management. You can try to send "connection: close"
headers with each POST request, so the HTTP client does not try
to re-use connections. If that doesn't help, try to force HTTP client
back to the HTTP/1.0 protocol, which disables connection re-use
completely.
I agree with Oleg's guess that it is a server problem. The server
probably indicates HTTP/1.1 support, but does not implement
connection re-use for POSt requests. So when HTTP client relies
on this feature, the server fails.
cheers,
Roland
"Nick Jarvis" <[EMAIL PROTECTED]>
15.10.2004 19:41
Please respond to
"Commons HttpClient Project"
To
[EMAIL PROTECTED]
cc
Subject
Re: HTTP Version Not Supported Error
Hi Roland,
I don't understand why I am not able to synchronize the post method
considering that I am simply subclassing the PostMethod. What I have done
is simply copy the EntityEnclosingMethod's writeRequestBody function in my
new class first to see if it would work similarly like the post method
does.
This will not work for me and returns the HTTP Version Not Supported
function when the connection manager is done blocking after the max
connections per host is reached. So to reiterate, if my max connections
per
host for my MultiThreadedHttpConnectionManager is set to 2, and the max
total connections is default at 20, and I am trying to upload say 6 files
at
the same time. The first two will work succesfully blocking the rest of
the
threads. When one becomes available, the third file is giving me the
server
error of HTTP Version Not Supported. The fourth file will upload
correctly
when the thread is unblocked. Then the fifth will return the same HTTP
Verson Not Supported error and the sixth will work. Here is the code for
my
subclass. Below this class is how I would be using it in a thread run()
function.
public class UploadMethod extends PostMethod {
protected boolean writeRequestBody(HttpState state, HttpConnection
conn)
throws IOException, HttpException {
if (!super.hasRequestContent()) {
return true;
}
int contentLength = super.getRequestContentLength();
InputStream instream = null;
if (this.requestStream != null) {
instream = super.getRequestBodyAsStream();
}
if (instream == null) {
return true;
}
OutputStream outstream = conn.getRequestOutputStream();
if (contentLength >= 0) {
// don't need a watcher here - we're reading from something
local,
// not server-side.
instream = new ContentLengthInputStream(instream,
contentLength);
}
byte[] tmp = new byte[4096];
int total = 0;
int i = 0;
while ((i = instream.read(tmp)) >= 0) {
outstream.write(tmp, 0, i);
total += i;
}
if ((contentLength > 0) && (total < contentLength)) {
throw new IOException("Unexpected end of input stream after "
+ total + " bytes (expected " + contentLength + "
bytes)");
}
return true;
}
}
This is how I would be using this class in a thread:
File file = new File(filePath);
UploadMethod method = new UploadMethod(ServletAddress);
method.setRequestConentLength(file.length);
method.setRequestHeader("Content-type", "application/octet-stream");
method.setRequestBodyAsStream(new FileInputStream(file));
int status = client.execute(method);
Thanks agiain,
Nick
>From: Roland Weber <[EMAIL PROTECTED]>
>Reply-To: "Commons HttpClient Project"
><[EMAIL PROTECTED]>
>To: "Commons HttpClient Project"
><[EMAIL PROTECTED]>
>Subject: Re: HTTP Version Not Supported Error
>Date: Fri, 15 Oct 2004 09:19:23 +0200
>
>Hello Nick,
>
>by implementing ...methods.multipart.PartSource, you can supply your
>own InputStream. Using HttpMethod.getResponseBodyAsStream(),
>you have direct access to the input stream of the response. What more
>control do you need?
>
>The problem you report suggests that your version of the post method
>somehow fails to synchronize the connection usage. But that is hard to
>diagnose if you don't send the modified source.
>
>cheers,
> Roland
>
>
>
>
>
>"Nick Jarvis" <[EMAIL PROTECTED]>
>14.10.2004 20:13
>Please respond to
>"Commons HttpClient Project"
>
>
>To
>[EMAIL PROTECTED]
>cc
>
>Subject
>HTTP Version Not Supported Error
>
>
>
>
>
>
>I am currently using HttpClient 2.0.2 and trying to create a multi
>threaded
>file upload. I have restrictions on the project I can use , therefore I
>am
>using HttpClient MultiThreadedHttpConnectionManager that is connecting to
>the same host and I am using HttpClient PostMethod for the upload. I am
>trying to use the PostMethod as a subclass and overide the
>WriteRequestBody
>function to have more control over the upload. However, I am getting and
>error reading: 'HTTP Version Not Supported' from the status text for the
>third thread (for the third file that I am trying to upload after the
>previoius two are complete). The response from the server is not pretty
>either. I even tried copying the same exact source from the PostMetho
>class
>into a new class but I am still getting this error when running the
>method.
>I am noticing that the MultiThreadedHttpConnectionManager defaults to 2
>connections per host, and the manager seems to be blocking my third
thread
>
>until one of the other two complete. Once one thread is complete and
>unblocks the next thread, I am unable to upload the next file due to this
>server error. If I increase the connections per host variable, the
upload
>
>after the connections per host limit is returning this message. If I
>just
>use the PostMethod or MultipartPostMethod, the uploads work fine, but I
>need
>more control over the input stream and the upload. Could someone please
>advise. Thank you for your time,
>
>Nick Jarvis
>
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