Python script for SVG to PNG conversion with Extjs -

i'm trying save chart converting svg png python script. start storing svg data in variable :

var svgdata = ext.draw.engine.svgexporter.generate(chart.surface); 

when alert(svgdata), can see output correct.

but when send server :

ext.draw.engine.imageexporter.defaulturl = "data/svg_to_png.py?svgdata="+svgdata; 

the svgdata has been sent looks :

<?xml version= 

i'm new extjs, please me on one. right way send svg data python script , render png image ?

this python script :

import cairo import cgi import rsvg print "content-type: image/png\n\n"  arguments = cgi.fieldstorage() img =  cairo.imagesurface(cairo.format_argb32, 640,480) ctx = cairo.context(img) handler= rsvg.handle(none, str(arguments["svgdata"])) handler.render_cairo(ctx) img.write_to_png("svg.png") 

help me please!

<div style="display:none;">     <iframe id="file_download_iframe" src="blank.html"></iframe> </div> 

you need blank html page on server work in browsers. blank.html page empty page satisfy ifram has page in it.

then need basic form hidden somewhere too:

<div style="display:none;">     <form         id = "file_download_iframe_form"         name = "file_download_iframe_form"         target = "file_download_iframe"         method = "post"         action = "data/svg_to_png.py"     >         <input type="hidden" id="svgdata" name="svgdata"/>     </form> </div> 

then have javascript function this:

function getimage(svgdata){     var form = document.getelementbyid("file_download_iframe_form");     document.getelementbyid("svgdata").value = svgdata;     form.submit(); };