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POHTTP Streaming with Apache, Perl, and jQuery?
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  1. POHTTP Streaming with Apache, Perl, and jQuery?
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    copied!<p>I'm trying to prepare a proof of concept for a page that will take a file that a user chooses, process it, and return it, all the while reporting on the status of the process. I thought the best solution for this may be HTTP streaming, however I can only get it working in Firefox (not Chrome or IE8.)</p> <h2>load.js</h2> <pre><code>$(function() { var xhr = $.ajax({ url: '/nph-handleRequest.cgi' ,type: 'get' }); collectPartial(xhr,''); }); var collectPartial = function (xhr,lastContent) { alert(xhr.readyState); if (xhr.readyState == 3 &amp;&amp; lastContent != xhr.responseText) { lastContent = xhr.responseText; alert(xhr.responseText); } if (xhr.readyState &lt; 4) { setTimeout(function() {collectPartial(xhr,lastContent)}, 1000); } } </code></pre> <h2>nph-handleRequest.cgi</h2> <pre><code>#!/usr/bin/perl $|=1; print "$ENV{SERVER_PROTOCOL} 206 Partial Content\n"; print "Server: $ENV{SERVER_SOFTWARE}\n"; print "Content-type: text/plain\n\n"; for ($count = 1; $count &lt; 5; $count++) { print time(); print "\n"; sleep(2); } </code></pre> <p>In Firefox, the alert(xhr.readyState) keeps displaying a 3, as I would expect. In Chrome, though? 1. In IE it's 2. Neither allow me to access responseText either.</p> <p>Any suggestions as to what I'm doing wrong would be greatly appreciated.</p> <h2>Edit 1</h2> <p>It's actually MiniServ, not Apache. The server doesn't appear to be the issue though, as it works in one browser, and not another.</p> <h2>Edit 2</h2> <p>After discovering CGI::Push, I tried using that, despite warnings that it doesn't work in IE. Oddly, it DID work in IE8 (not perfectly), but still not in Chrome.</p> <pre><code>#!/usr/bin/perl $|=1; use CGI::Push qw(:standard); do_push(-next_page=&gt;\&amp;display_time,-delay=&gt;2); sub display_time { my($q,$counter) = @_; return undef if $counter &gt; 5; return time()," "x256, "\n"; } </code></pre>
 

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