local python module import fails (offline, firefox)

Using firefox 17.0.1, put the following files in temporary folder
(see content below)
x.html
a.py
brython.js

x.html reports the following messages in the console:

not well-formed @ file:///tmp/zzz/a.py?foo=ot45ebsl:1
ImportError: ImportError: No module named 'a'
Line 1
            import a @ file:///tmp/zzz/brython.js:2839

My understanding of the issues is that
- there is no http request issued (local browsing),
  and the browser has to guess the type of the file imported
  and got it wrong :(
- when the file is loaded, the status of the XMLHttpRequest is not 200,
  but 0 (probably because of local browsing)

Patching function $import() this way improve the situation in the given context

--- zzz/brython.js  2012-12-28 19:24:32.661336728 +0100
+++ repos/brython-read-only/brython.js  2012-12-28 11:09:18.849140441 +0100
@@ -272,11 +272,10 @@
 }else{
 var $xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")
 }
+$xmlhttp.overrideMimeType("text/plain")
 $xmlhttp.onreadystatechange=function(){
 if($xmlhttp.readyState==4){
 window.clearTimeout(timer)
-if($xmlhttp.status==200){res=$xmlhttp.responseText}
+if($xmlhttp.status==200 || $xmlhttp.status==0){res=$xmlhttp.responseText}
 else{
 document.$context=calling.context
 document.line_num=calling.line

------------------------------------------------------------------
x.html
------------------------------------------------------------------
<html>
    <head>
        <title>Test import</title>
        <meta charset="utf-8"/>
        <script src="brython.js"></script>
    </head>

    <body onLoad="brython()">
        <script type="text/python">
            import a
        </script>
        <p>Test Import</p>
    </body>
</html>

------------------------------------------------------------------
a.py
------------------------------------------------------------------
print(1)

Original issue reported on code.google.com by pedro.ro...@gmail.com on 28 Dec 2012 at 6:40

sgzwiz / brython

local python module import fails (offline, firefox) #20