473,727 Members | 1,988 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Regex'ing null bytes

Hi,

I'm trying to parse some binary data with regexes. It works well in
the latest Python build, but I need to run this on Python 1.5.2. The
binary data has a pattern like this:

keyName1\002..( .*)\000.*keyNam e2\002..(.*)\00 0
(I'm using regex syntax to illustrate)

So I wrote the following script:

def amfKey(str):
return "%s\002..([^\000]*)" % str

keys = re.compile(amfK ey("key"), re.DOTALL).find all(amfStr)

Works on 2.3.3, but produces the following error on 1.5.2:

Traceback (innermost last):
File "test.py", line 26, in ?
keys = re.compile(amfK ey("key"), re.DOTALL).find all(amfStr)
File "C:\Python152\L ib\re.py", line 79, in compile
code=pcre_compi le(pattern, flags, groupindex)
TypeError: argument 1: expected string without null bytes, string found

Does anyone know a workaround? The type of binary data I'm trying to
parse is AMF (Action Message Format), Macromedia's proprietary format
for fast communication between the Flash Player and their "Flash
Remoting" servers (ColdFusion/.NET/Java implementations ). But there
are opensource "Flash Remoting" implementations in PHP (amfphp.org),
Perl (simonf.com/flap/) and Java (openamf.org) already - I've
started to work on the Python port.

And I wanted to keep this Python 1.5.2-compatible...

Thanks in advance,
=-
Jonas Galvez
jonasgalvez.com/blog
macromedia.com/go/team

Jul 18 '05 #1
0 1698

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

7
2572
by: Dan Stromberg | last post by:
I'm working on writing a program that will synchronize one database with another. For the source database, we can just use the python sybase API; that's nice and normal. For the target database, unfortunately, the only interface we have access to, is http+html based. There's same javascript involved too, but hopefully we won't have to interact with that. So, I've got Basic AUTH going with http, but now I'm faced with the following...
6
2427
by: Xah Lee | last post by:
how to represent the unicode "em space" in regex? e.g. i want do something like this: fracture=re.split(r'\342371*\|\342371*',myline,re.U) Xah xah@xahlee.org ∑ http://xahlee.org/
7
5727
by: alphatan | last post by:
Is there relative source or document for this purpose? I've searched the index of "Mastering Regular Expression", but cannot get the useful information for C. Thanks in advanced. -- Learning is to improve, but not to prove.
3
265
by: DevBoy | last post by:
I am in need of parsing string based on characters like / or { or } or ^ However, anytime I try and run the following code I do not the proper results (It always returns the same string unparsed. Regex rx = new Regex("{"); string segmentData = rx.split(str); Any helpful hints?
20
8115
by: jeevankodali | last post by:
Hi I have an .Net application which processes thousands of Xml nodes each day and for each node I am using around 30-40 Regex matches to see if they satisfy some conditions are not. These Regex matches are called within a loop (like if or for). E.g. for(int i = 0; i < 10; i++) { Regex r = new Regex();
14
2920
by: daveyand | last post by:
Hey guys, I've spent abit of time searching th web and also this group and cant seem to find a solution to my issue. Basically i want to get the current url, and then replace http:// with something else. Here is the current code.
3
2281
by: Masa Ito | last post by:
I am trying to capture the contents of a function with Regex. I am using Expresso to test (nice - thanks for the great tool UltraPico!). I can handle my own with single line regex's (I think).. I want to have a named capture of the entire 'contents' of specific functions. EG: Sample code <Description("{0} is a required field.")_ Protected Overridable Function AccountIDRequired(ByVal target As Object, ByVal e As RuleArgs) As Boolean...
15
50253
by: morleyc | last post by:
Hi, i would like to remove a number of characters from my string (\t \r \n which are throughout the string), i know regex can do this but i have no idea how. Any pointers much appreciated. Chris
0
8752
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
9406
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
9260
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
0
9120
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
8103
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
0
4521
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
0
4786
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
3228
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
2
2639
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.