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Posted to users@tomcat.apache.org by Michele Fuortes <mf...@med.cornell.edu> on 2008/08/07 20:18:28 UTC
Problem with POST to servlet: 16384 bytes maximum?
Hi,
I have a problem with POSTing an XML file to a servlet which writes
the XML to disk. If the XML file is less than 16384 bytes all goes
well. If it's bigger the first 16384 bytes are written correctly, the
rest all all 00s. The lenght of the file is the correct one as in the
Content-Length: http header.
The servlet is very simple (I did not write it), the relevant parts are:
File file;
FileOutputStream out2;
DataOutputStream out3;
......
file = new File(req.getRealPath(filePath));
out2 = new FileOutputStream(file);
out3 = new DataOutputStream(out2);
......
bytesAvailable=req.getContentLength();
byte[] theBytes=new byte[bytesAvailable];
in.read(theBytes);
out3.write(theBytes,0,bytesAvailable);
out3.flush();
....
Can anyone help? Is there a buffer limit somewhere that I have to
change.
I'm using Apache 2.063/Tomcat/4.1.29-LE-jdk14 on MacOS 10.5.3
Thanks
Michele Fuortes
--
Michele Fuortes, M.D., Ph.D.
Assistant Professor
Department of Cell and Developmental Biology
Cornell University - Weill Medical College
E-mail: mfuortes@med.cornell.edu
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Re: Problem with POST to servlet: 16384 bytes maximum?
Posted by Warren Killian <wa...@gmail.com>.
Hi,
If you can't get past this limitation, you might look into the Apache
Commons "file upload" utility. It is an API specifically for allowing
(large) file uploads to a server. It works great, has a simple API and some
decent documentation as well. Hope this helps.
On Thu, Aug 7, 2008 at 2:18 PM, Michele Fuortes <mf...@med.cornell.edu>wrote:
> Hi,
>
> I have a problem with POSTing an XML file to a servlet which writes the XML
> to disk. If the XML file is less than 16384 bytes all goes well. If it's
> bigger the first 16384 bytes are written correctly, the rest all all 00s.
> The lenght of the file is the correct one as in the Content-Length: http
> header.
>
> The servlet is very simple (I did not write it), the relevant parts are:
>
> File file;
> FileOutputStream out2;
> DataOutputStream out3;
> ......
> file = new File(req.getRealPath(filePath));
> out2 = new FileOutputStream(file);
> out3 = new DataOutputStream(out2);
> ......
> bytesAvailable=req.getContentLength();
> byte[] theBytes=new byte[bytesAvailable];
> in.read(theBytes);
> out3.write(theBytes,0,bytesAvailable);
> out3.flush();
> ....
>
> Can anyone help? Is there a buffer limit somewhere that I have to change.
> I'm using Apache 2.063/Tomcat/4.1.29-LE-jdk14 on MacOS 10.5.3
>
> Thanks
>
> Michele Fuortes
>
>
> --
> Michele Fuortes, M.D., Ph.D.
> Assistant Professor
> Department of Cell and Developmental Biology
> Cornell University - Weill Medical College
> E-mail: mfuortes@med.cornell.edu
>
>
>
>
>
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> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
Re: Problem with POST to servlet: 16384 bytes maximum?
Posted by Konstantin Kolinko <kn...@gmail.com>.
2008/8/7 Michele Fuortes <mf...@med.cornell.edu>:
> Hi,
>
> I have a problem with POSTing an XML file to a servlet which writes the XML
> to disk. If the XML file is less than 16384 bytes all goes well. If it's
> bigger the first 16384 bytes are written correctly, the rest all all 00s.
> The lenght of the file is the correct one as in the Content-Length: http
> header.
>
> The servlet is very simple (I did not write it), the relevant parts are:
>
> File file;
> FileOutputStream out2;
> DataOutputStream out3;
> ......
> file = new File(req.getRealPath(filePath));
> out2 = new FileOutputStream(file);
> out3 = new DataOutputStream(out2);
> ......
> bytesAvailable=req.getContentLength();
> byte[] theBytes=new byte[bytesAvailable];
> in.read(theBytes);
> out3.write(theBytes,0,bytesAvailable);
> out3.flush();
> ....
>
> Can anyone help?
The problem with the above code is that you (or the author of that code,
if you are not the one) do ignore the return value of InputStream.read()
call.
That value will be the exact count of bytes that were read into your
buffer in that call of InputStream.read().
You have just demonstrated that one cannot read all contentLength
bytes of data in one call.
The easiest fix here will be to use a loop, see Christopher Schultz's
message for an example.
Best regards,
Konstantin Kolinko
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Re: Problem with POST to servlet: 16384 bytes maximum?
Posted by Johnny Kewl <jo...@kewlstuff.co.za>.
----- Original Message -----
From: "Michele Fuortes" <mf...@med.cornell.edu>
To: <us...@tomcat.apache.org>
Sent: Thursday, August 07, 2008 8:18 PM
Subject: Problem with POST to servlet: 16384 bytes maximum?
> Hi,
>
> I have a problem with POSTing an XML file to a servlet which writes the
> XML to disk. If the XML file is less than 16384 bytes all goes well. If
> it's bigger the first 16384 bytes are written correctly, the rest all all
> 00s. The lenght of the file is the correct one as in the Content-Length:
> http header.
>
> The servlet is very simple (I did not write it), the relevant parts are:
>
> File file;
> FileOutputStream out2;
> DataOutputStream out3;
> ......
> file = new File(req.getRealPath(filePath));
> out2 = new FileOutputStream(file);
> out3 = new DataOutputStream(out2);
> ......
> bytesAvailable=req.getContentLength();
> byte[] theBytes=new byte[bytesAvailable];
> in.read(theBytes);
> out3.write(theBytes,0,bytesAvailable);
> out3.flush();
> ....
>
> Can anyone help? Is there a buffer limit somewhere that I have to change.
> I'm using Apache 2.063/Tomcat/4.1.29-LE-jdk14 on MacOS 10.5.3
>
> Thanks
>
> Michele Fuortes
>
>
> --
> Michele Fuortes, M.D., Ph.D.
> Assistant Professor
> Department of Cell and Developmental Biology
> Cornell University - Weill Medical College
> E-mail: mfuortes@med.cornell.edu
Michele... check this out... the default POST size is actually much
larger...
I suspect it may be an encoding problem.... whatever is sending that file
must also encode it correctly...
If you try a diff XML file and this size changes.... its the issue.
Long time since I messed with this stuff... but I dont think a raw XML file
will post...
XML is full of little gremlins that mean something to a url decoder if not
encoded ;)
http://tomcat.apache.org/tomcat-5.5-doc/config/http.html
Other possibility is theres a funny with the https... try do a normal http
just to elim that as well..
Good luck...
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Re: Problem with POST to servlet: 16384 bytes maximum?
Posted by André Warnier <aw...@ice-sa.com>.
Michele Fuortes wrote:
> Hi,
>
> I have a problem with POSTing an XML file to a servlet which writes the
> XML to disk. If the XML file is less than 16384 bytes all goes well. If
> it's bigger the first 16384 bytes are written correctly, the rest all
> all 00s. The lenght of the file is the correct one as in the
> Content-Length: http header.
>
1) How do you POST the data ? I mean what is the client-side application
which composes and sends the POST ?
2) this may help :
http://forums.sun.com/thread.jspa?messageID=2344227
André
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Re: Problem with POST to servlet: 16384 bytes maximum?
Posted by Mark Thomas <ma...@apache.org>.
Sam Wun wrote:
> Hi,
>
> I am wondering how to fix the following attached error (mvn command run)?
> I tried to follow the instruction shown in the following website, but got error.
> http://struts.apache.org/2.x/docs/developing-a-portlet-using-eclipse.html
1. Don't hijack threads.
2. Read the FAQ, particularly http://wiki.apache.org/tomcat/FAQ/Tomcat_User
3. Try asking on the right list.
Mark
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Re: Problem with POST to servlet: 16384 bytes maximum?
Posted by Sam Wun <sw...@gmail.com>.
Hi,
I am wondering how to fix the following attached error (mvn command run)?
I tried to follow the instruction shown in the following website, but got error.
http://struts.apache.org/2.x/docs/developing-a-portlet-using-eclipse.html
=========== attached mvn command run ===========
Maven version: 2.0.9
Java version: 1.6.0_10-beta
OS name: "windows vista" version: "6.0" arch: "x86" Family: "windows"
D:\workspace\samples\portlet>mvn archetype:create -DgroupId=com.mycompany.mypor
let \
[INFO] Scanning for projects...
[INFO] Searching repository for plugin with prefix: 'archetype'.
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Invalid task '\': you must specify a valid lifecycle phase, or a goal in
the format plugin:goal or pluginGroupId:pluginArtifactId:pluginVersion:goal
[INFO] ------------------------------------------------------------------------
[INFO] For more information, run Maven with the -e switch
[INFO] ------------------------------------------------------------------------
[INFO] Total time: < 1 second
[INFO] Finished at: Fri Aug 08 17:32:51 EST 2008
[INFO] Final Memory: 2M/4M
[INFO] ------------------------------------------------------------------------
D:\workspace\samples\portlet>mvn archetype:create -DgroupId=com.mycompany.mypor
let -DartifactId=myportlet -DarchetypeGroupId=org.apache.struts -DarchetypeAr
ifactId=struts2-archetype-portlet -DarchetypeVersion=2.0.9-SNAPSHOT -Dremote
epositories=http://people.apache.org/repo/m2-snapshot-repository
[INFO] Scanning for projects...
[INFO] Searching repository for plugin with prefix: 'archetype'.
[INFO] ------------------------------------------------------------------------
[INFO] Building Maven Default Project
[INFO] task-segment: [archetype:create] (aggregator-style)
[INFO] ------------------------------------------------------------------------
[INFO] Setting property: classpath.resource.loader.class => 'org.codehaus.plexu
.velocity.ContextClassLoaderResourceLoader'.
[INFO] Setting property: velocimacro.messages.on => 'false'.
[INFO] Setting property: resource.loader => 'classpath'.
[INFO] Setting property: resource.manager.logwhenfound => 'false'.
[INFO] [archetype:create]
[WARNING] This goal is deprecated. Please use mvn archetype:generate instead
[INFO] Defaulting package to group ID: com.mycompany.myportlet
[INFO] We are using command line specified remote repositories: http://people.a
ache.org/repo/m2-snapshot-repository
[INFO] snapshot org.apache.struts:struts2-archetype-portlet:2.0.9-SNAPSHOT: che
king for updates from id0
Downloading: http://people.apache.org/repo/m2-snapshot-repository/org/apache/st
uts/struts2-archetype-portlet/2.0.9-SNAPSHOT/struts2-archetype-portlet-2.0.9-SN
PSHOT.jar
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Error creating from archetype
Embedded error: OldArchetype does not exist.
Unable to download the artifact from any repository
[INFO] ------------------------------------------------------------------------
[INFO] For more information, run Maven with the -e switch
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 10 seconds
[INFO] Finished at: Fri Aug 08 17:33:37 EST 2008
[INFO] Final Memory: 8M/15M
[INFO] ------------------------------------------------------------------------
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