O'Reilly Network: Web Client Programming in Python

By ServerWatch Staff (Send Email)
Posted Jun 22, 2000


"Web client programming is a powerful technique for querying the Web. A web client is any program that retrieves data from a web server using the Hyper Text Transfer Protocol (the http in your URLs). A web browser is a client; so are web crawlers, programs that traverse the Web automatically to gather information. You can also use web clients to take advantage of services offered by others on the Web and add dynamic features to your own web site."

Web client programming belongs in any developer's toolbox. Perl aficionados have employed it for years. In Python, the process reaches even higher levels of convenience and flexibility. Three modules provide most of the functionality you will need: HTTPLIB, URLLIB, and a newer addition, XMLRPCLIB. In true Pythonesque fashion, each module builds upon its predecessor, providing a solid, well-designed base for your applications. We will cover the first two modules in this article, saving XMLRPCLIB for a later time.

"Web client programming belongs in any developer's toolbox. Perl aficionados have employed it for years. In Python, the process reaches even higher levels of convenience and flexibility. Three modules provide most of the functionality you will need: HTTPLIB, URLLIB, and a newer addition, XMLRPCLIB. In true Pythonesque fashion, each module builds upon its predecessor, providing a solid, well-designed base for your applications. We will cover the first two modules in this article, saving XMLRPCLIB for a later time."

"For our examples, we will use Meerkat. If you are like me, you invest time tracking trends and developments in the open source community to give you a competitive edge. Meerkat is a tool that makes that task much easier. It is an open wire service that collects and collates an enormous amount of information on open source computing. Although its browser interface is flexible and customizable, using web client programming we can scan, extract, and even store this information off-line for later use. We will first access Meerkat using HTTPLIB interactively, and then move on to accessing Meerkat's Open API via URLLIB to create a customizable information-collecting tool."

Page 1 of 1


Comment and Contribute

Your name/nickname

Your email

(Maximum characters: 1200). You have characters left.