Server A using xmlreader to read XML from xmlwriter on server B - php

Question

I have two servers
Server A reads http://www.some-url.com/xmlwriter_src.php using
$reader = new XMLReader();
$reader->open('http://www.some-url.com/xmlwriter_src.php');
while ($reader->read())
{
/* -- do something -- */
}
Server B creates an xml stream
$writer = new XMLWriter();
$writer->openURI('php://output');
$writer->startDocument("1.0");
$writer->startElement("records");
while(!$recordset->EOF)
{
$writer->startElement($fieldname)
$writer->text($recordset->fields[$fieldname]);
$writer->endElement();
$recordset->movenext();
}
the xmlreader on server A keeps complaining that server B doesnt respond, even though I can see the xml result in the browser.
It takes less than a second to generate
If i copy the xml to a static file, the xmlreader outputs the file.

Answer 1

did u tried adding
header("Content-Type: text/xml");
Else the reader will consider it as simple text and wont work. Try giving that at the begining of the file.

Answer 2

By default the writter will buffer your output.
Once you are done you MUST call flush().
$writer = new XMLWriter();
$writer->openURI('php://output');
$writer->startDocument("1.0");
$writer->startElement("records");
while(!$recordset->EOF)
{
$writer->startElement($fieldname)
$writer->text($recordset->fields[$fieldname]);
$writer->endElement();
$recordset->movenext();
}
$writer->flush();
By the way:
where do you close the records element?

Answer 3

Try writing whatever xmlReader reads on the disk and inspect the generated file. I have a hunch its either empty or invalid(incomplete) XML.
If i'm right, then you might have a timeout that expires sooner than the one you get in a real browser. Either that, or a connection that requires either connection-close or keepalive(i've seen servers broken like this).
Also, make sure you dont have a firewall on the server where the client runs that might block the xmlReader from talking to the xmlWriter:) Try iptables -L in the server console to check any firewall rules.
Edit: you might also need to call something like xmlReader->close(), or end() or whatever member you got there that closes the connection and signals the client that the transmission is over.