309203 - zlib compressed SVG is not displayed in Firefox 1.5 Beta 1

Status: RESOLVED INVALID

(Firefox :: General, defect)

Description

[tobin.bradley]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b4) Gecko/20050908 Firefox/1.4
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b4) Gecko/20050908 Firefox/1.4

When trying to view a zlib compressed SVG file (php zlib compression), you get
the following error:

XML Parsing Error: not well-formed
Location: http://maps.co.mecklenburg.nc.us/website/svggis/svg.php
Line Number 1, Column 1:�

The actual PHP code looks like this:
header("Content-type: image/svg+xml")
ini_set('zlib.output_compression', 'On')

The source looks like gobblygook (i.e. like it never interpreted the compressed
informatino).

Regular pages that are compressed come across fine, so it's only in the SVG
renderer.  This is also something new - it opened compressed SVG files in Deer
Park Alpha 1 (and 2, though I don't remember checking that for sure).  Also
works fine in IE with Adobe SVG.

Reproducible: Always

Steps to Reproduce:
1.  Go to the page above.

Actual Results:  
See the following error message:
XML Parsing Error: not well-formed
Location: http://maps.co.mecklenburg.nc.us/website/svggis/svg.php
Line Number 1, Column 1:�

Expected Results:  
Render SVG image.

I'm trying to do web-based GIS mapping with SVG, and as the geometries are
complex, compressing the SVG is the only way to keep the file from getting
unusably large.  So, for my little corner of the pond, it's a fairly big deal.

Comment 1

[Jesse Ruderman]

You need to send a Content-Encoding header if you gzip the content.  See
http://jwatt.org/svg/authoring/#server-configuration.  This is what I see with
"telnet 66.194.122.236 80" and pasting the GET request from web-sniffer.net:

HTTP/1.1 200 OK
Date: Mon, 19 Sep 2005 22:30:11 GMT
X-Powered-By: ASP.NET
Connection: close
X-Powered-By: PHP/5.0.4
Content-type: image/svg+xml

[Gzipped compressed content]