A final step, once you get that stuff working, is to implement
support for HTTP
proxies. This is very easy. Give the
user a checkbox if they want to use a proxy or not, and if so,
ask the proxy host and proxy port. Now, if they selected to use a proxy, do
not connect to www.livejournal.com
and port 80, but instead connect to their
proxy host on whatever proxy port they specified. The rest is basically the
same, except for one difference. Instead of doing:
POST /interface/flat HTTP/1.1
You would do:
POST http://www.livejournal.com/interface/flat HTTP/1.1
That line tells the proxy what host it needs to connect to in order to
make the real request. The rest of the HTTP
you should leave just as you did
before.