How to read a jpg bytearray from a Flash AS3 file

[rsgalloway@gmail.com]

I'm trying to save an image from a Flash AS3 to my server as a jpg
file. I found some PHP code to do this, but I want to do this in
Python. I'm not quite sure how to convert the following code to
Python. It's mainly the $GLOBALS["HTTP_RAW_POST_ DATA"] part I don't
know how to convert.

<?php

if ( isset ( $GLOBALS["HTTP_RAW_POST_ DATA"] )) {

// get bytearray
$im = $GLOBALS["HTTP_RAW_POST_ DATA"];

// save image
$f = fopen($_GET['name'], 'wb');
fwrite($f, $jpg);
fclose($f);

} else echo 'An error occured.';

?>

source:

http://designreviver.com/tutorials/actionscript-3-jpeg-encoder-revealed-saving-images-from-flash/

[Kay Schluehr]

Re: How to read a jpg bytearray from a Flash AS3 file

On 26 Sep., 08:47, rsgallo...@gmai l.com wrote:

I'm trying to save an image from a Flash AS3 to my server as a jpg
file. I found some PHP code to do this, but I want to do this in
Python.

I'd expect you use AS3 to save the image file ( just looking at Adobes
AS3 docs on how this works ) and load it with PIL if you want to post-
process it in Python:

http://www.pythonware.com/products/pil/

[Fredrik Lundh]

Re: How to read a jpg bytearray from a Flash AS3 file

rsgalloway@gmai l.com wrote:

I'm trying to save an image from a Flash AS3 to my server as a jpg
file. I found some PHP code to do this, but I want to do this in
Python. I'm not quite sure how to convert the following code to
Python. It's mainly the $GLOBALS["HTTP_RAW_POST_ DATA"] part I don't
know how to convert.

depends on what framework you're using. if you're using plain CGI, you
should be able to read the posted data from sys.stdin:

import sys

im = sys.stdin.read( )

f = open(name, 'wb')
f.write(jpg)
f.close()

to make your code a bit more robust, you may want to check the
content-length before doing the read, e.g.

import os

if os.environ.get( "REQUEST_METHOD ") != "POST":
... report invalid request ...

bytes = int(os.environ. get("CONTENT_LE NGTH", 0))
if bytes MAX_REQUEST_SIZ E:
... report request too large ...

im = sys.stdin.read( bytes)

to deal with query parameters etc, see

http://docs.python.org/lib/module-cgi.html

</F>

[rsgalloway@gmail.com]

Re: How to read a jpg bytearray from a Flash AS3 file


Thanks! I'm using form = cgi.FieldStorag e(). When I print out the
contents of form, I get this:

FieldStorage(No ne, None, '\xff\xd8\xff\x e0\x00\x10JFIF
\x00\x01\x01\x0 0\x00\x01\x00\x 01\x00\x00\xff\ xdb
\x00\x84\x00\x0 5\x03\x04\x04\x 04\x03\x05\x04\ x04\x04\x05\x05 \x05\x06\x07\x0 c
\x08\x07\x07\x0 7\x07\x0f\x0b\x 0b\t\x0c\x11\x0 f\x12\x12\x11\x 0f
\x11\x11\x13\x1 6\x1c\x17\x13\x 14\x1a\x15\x11\ x11\x18!\x18\x1 a\x1d\x1d
\x1f\x1f\x1f\x1 3\x17"$"\x1e$\x 1c\x1e\x1f\x1e
\x01\x05\x05\x0 5\x07\x06\x07\x 0e\x08\x08\x0e\ x1e\x14\x11\x14 \x1e\x1e
\x1e\x1e\x1e\x1 e\x1e\x1e\x1e\x 1e\x1e\x1e\x1e\ x1e\x1e\x1e\x1e \x1e\x1e
\x1e\x1e\x1e\x1 e\x1e\x1e\x1e\x 1e\x1e\x1e\x1e\ x1e\x1e\x1e\x1e \x1e\x1e
\x1e\x1e\x1e\x1 e\x1e\x1e\x1e\x 1e\x1e\x1e\x1e\ x1e\x1e\x1e\xff \.....

Which is obviously the binary data of the image I want. How do I
access this data? I'm used to getting it like this:

name = form['name'].value

But I don't think this will work in this case. TIA.

[Tim Roberts]

Re: How to read a jpg bytearray from a Flash AS3 file

rsgalloway@gmai l.com wrote:

>
>Thanks! I'm using form = cgi.FieldStorag e(). When I print out the
>contents of form, I get this:
>
FieldStorage(No ne, None, '\xff\xd8\xff\x e0\x00\x10JFIF
>\x00\x01\x01\x 00\x00\x01\x00\ x01\x00\x00\xff \xdb
>\x00\x84\x00\x 05\x03\x04\x04\ x04\x03\x05\x04 \x04\x04\x05\x0 5\x05\x06\x07\x 0c
>\x08\x07\x07\x 07\x07\x0f\x0b\ x0b\t\x0c\x11\x 0f\x12\x12\x11\ x0f
>\x11\x11\x13\x 16\x1c\x17\x13\ x14\x1a\x15\x11 \x11\x18!\x18\x 1a\x1d\x1d
>\x1f\x1f\x1f\x 13\x17"$"\x1e$\ x1c\x1e\x1f\x1e
>\x01\x05\x05\x 05\x07\x06\x07\ x0e\x08\x08\x0e \x1e\x14\x11\x1 4\x1e\x1e
>\x1e\x1e\x1e\x 1e\x1e\x1e\x1e\ x1e\x1e\x1e\x1e \x1e\x1e\x1e\x1 e\x1e\x1e
>\x1e\x1e\x1e\x 1e\x1e\x1e\x1e\ x1e\x1e\x1e\x1e \x1e\x1e\x1e\x1 e\x1e\x1e
>\x1e\x1e\x1e\x 1e\x1e\x1e\x1e\ x1e\x1e\x1e\x1e \x1e\x1e\x1e\xf f\.....
>
>Which is obviously the binary data of the image I want. How do I
>access this data? I'm used to getting it like this:
>
name = form['name'].value
>
>But I don't think this will work in this case. TIA.

What led you to ask that here, instead of taking 60 seconds to load cgi.py
in an editor and search for the FieldStorage class?
--
Tim Roberts, timr@probo.com
Providenza & Boekelheide, Inc.