Saturday, April 30, 2005

darcs rocks

I've been experimenting with darcs since Titus mentioned it at the last SoCal Piggies meeting, and my conclusion is that it's the best revision control tool I've seen, for personal-scale projects. I haven't really stress-tested it for project size scalability yet, so that's where the possible caveat lies. I've heard that it couldn't handle the Linux kernel... but then, not many things can.

If you don't already use a revision control tool, or if you're not quite happy with the one you've got, give darcs a shot.


Thursday, April 28, 2005

Poor man's Web services with HTTP POST

I use HTTP POST as a lightweight mechanism for posting test results to a central location. I have tests running on various clients/platforms/OSes, and I need a way to keep track of the results of those tests. For this, I have an Apache server running CGI scripts that talk to a Firebird database. By using HTTP POST from the clients to the Apache server, I keep things simple, because the clients don't need to have any database bindings or drivers installed. In fact, all the clients need to know is how to open a socket on port 80 to the Web server.

This can be looked at as a poor man's Web service mechanism.

Here is the http_post function I'm using:

def http_post(data, cgi_cmd, webserver=""):
if not webserver:
webserver = "mywebserver.mydomain.com"
if type(data) == type(u''): # unicode
data = data.encode('iso-8859-1')

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
sock.connect((webserver, 80))
except:
print "Error: Could not connect to " + webserver
return

url = "http://%s/cgi-bin/%s" % (webserver, cgi_cmd)

sock.send("POST %s HTTP/1.0\n" % url)
sock.send("Accept: */*\n")
sock.send("User-Agent: http_post_mechanism\n")
sock.send("Content-Type: application/x-www-form-urlencoded\n")
sock.send("Content-Length: %d\n\n" % len(data))
sock.send(data)
while 1:
response = sock.recv(8192)
if not response: break
output = response
sock.close()

Wednesday, April 27, 2005

Hello Piggies

I thought it would be a good idea to get a blog for the SoCal Piggies (Southern California Python Interest Group). This will be a "team blog", where all us Piggies will be able to post. I hope we will all contribute by posting for example short "Python tips and tricks" that can make our lives easier as Python users.