Http request receives incomplete data

Question

Hi,
I have an application reading one free format file via http request. This is implemented as stored procedure in a 8.1.6 database on Windows NT. The method readContent (pasted later on)takes the BufferedReader of an InputStreamReader of the InputStream of the socket connection on port 80, which I opened previously. Here is the instantiation:
sock_ = new Socket(host, port);
in_ = new BufferedReader(new
InputStreamReader(sock_.getInputStream()));
Everything works fine except that the read method on the BufferedReader refuses to read more than 20764 bytes while the http response header tells me that the content length is higher. If I compare the orginal file with the received one using a hex editor, they are identical, only that the received file is cut off after byte 20764.
Here is the logfile:
Request>> GET /download/OMIJID1234.ZIP HTTP/1.0
Response>> HTTP/1.1 200 OK
Response>> Date: Wed, 18 Apr 2001 07:26:17 GMT
Response>> Server: Apache/1.3.14 (Win32) ApacheJServ/1.1.2
Response>> Last-Modified: Wed, 18 Apr 2001 06:49:46 GMT
Response>> ETag: "0-58a4-3add390a"
Response>> Accept-Ranges: bytes
Response>> Content-Length: 22692
Response>> Connection: close
Response>> Content-Type: application/zip
Now we come to readContent method (see later on):
Number of chars read 16384
Number of chars read 4380
----------------- so far the logfile...
The total number of chars read is 20764 as you can calculate easily.
As soon as I use an orginal file which is smaller than 20764 the transfer is ok. Is there any limitation reading from a socket connection? Here is the code:
public String readContent() throws IOException
byte inChars[] = new char[16*1024];
int nofChars, totalNofChars=0;
StringBuffer sbuf = new StringBuffer();
do
nofChars = in_.read (inChars,0,inChars.length); // here is the problem !
Log.log("Number of chars read "+nofChars, Log.DEBUG); // this is the line you see in the logfile
if (nofChars != -1)
totalNofChars = totalNofChars+nofChars;
sbuf.append(inChars, 0, nofChars);
while (nofChars == inChars.length); // loop only if the buffer was filled
if (sbuf.length() == 0) {
return null; // nothing read
sbuf.setLength(sbuf.length() - 2); // cut off the trailing \r\n
return sbuf.toString();
I doubled the buffersize of the buffered reader: Same result.
I tried to check the maximum input length on the socket, and got the next error.
When I try to measure the actual buffersize with
sock_.getReceiveBufferSize();
I receive:
java.net.SocketException: Unsupported OS socket option
at
java.net.PlainSocketImpl.socketGetOption(PlainSocketImpl.jav
a)
at
java.net.PlainSocketImpl.getOption(PlainSocketImpl.java)
at java.net.Socket.getReceiveBufferSize(Socket.java)
But this method is documented for JDK 1.2, why do I get
this error ???
Any ideas with this?
Dirk

Answer 1

We have the same problem but our stop at 1790 bytes,
Do u mind to let us know how u solve this problem
thanx & regards
chen