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ddn3

Web Programming Question

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I''m new to web programming. I want to post a set of text much like this <form method=post> <input type="hidden" name="login" value="Login"> <input type="text" name="username" value="contenttest"> <input typex="password" name="password" value="pass"> to a url. I can connect to the server on port 80 (HTTP port?). I know HTTP is text based how do i get that infromation above into the server correctly using HTTP? Also how do i get to correct URL directory of the webserver. ie. www.gamedev.net/community/forums/post.asp And how do i get the response from the web server? Thanks! -ddn

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quote:
Original post by _ddn_
I''m new to web programming. I want to post a set of text much like this


<form method=post>
<input type="hidden" name="login" value="Login">
<input type="text" name="username" value="contenttest">
<input typex="password" name="password" value="pass">


to a url. I can connect to the server on port 80 (HTTP port?).

I know HTTP is text based how do i get that infromation above into the server correctly using HTTP? Also how do i get to correct URL directory of the webserver.

ie. www.gamedev.net/community/forums/post.asp

And how do i get the response from the web server?

Thanks!

-ddn


There are more than one way of doing this, most web site use either ASP, PHP or Cold Fusion to achieve these goals...



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Guest Anonymous Poster
I assume you mean programmatically connecting to a web server, sending that data and getting the result, right? I mean, not just writing a HTML page and posting it on the website?

Anyway, there''s two ways to send data from a form to a server, the POST method and the GET method. GET is the simplest, and just requires you to encode the url like this:

http://www.whatever.com/page.asp?name1=value1&name2=value2

In your case, it''d be something like this:

http://www.whatever.com/page.asp?login=Login&username=contenttest&password=pass

The POST method is a bit more tricky, but doesn''t limit you in the amount of data you send (URLs usually have a limited length, like 256 characters or something). What you do here is send the data in the POST_DATA variable (I think that''s what it''s called). I''m not sure of the formatting for this variable, but you should be able to find it on google easy enough.

Anyhoo, connecting to the server is simple, just connect your TCP socket to port 80, and send plain text that looks like this:

GET http://www.whatever.com/page.asp?name1=value1&name2=value2 HTTP/1.0

Followed by two carriage returns (to mark the end of the "header", then the server will send you back the results via the same socket. Very simple! If you want to use HTTP/1.1 (which is recommended) it''s a bit more complicated, since HTTP/1.1 has a few mandatory variables that you have to send. Again, a search on google should get you sorted quick enough.

You can test this out using telnet, just connect it to port 80 and type the line I gave above followed by two carriage returns. Then it''ll print out the source to the webpage (as well as a bunch of variables at the top) in the telnet window - this is great for debugging and whatnot...

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