socket header requests problems. some work some do not
 

Hello Memebers

I am wondering if you could help me.

I am having a problem and with some sites be able to issue
header requests and others not being able to issuse requests.

I am writing a socket programming checking for any redirection
urls.

Program works but I have a problem:

a) Can connect to urls like www.url.com:80 and
send header requests and receive a 200 Ok.

b) Can connect to www.alexa.com and send header
request by receive 400 BAD_REQUEST.
Using wget or curl or telnet
the requests goes through. Why?

I have tested the program on the forture 500 companies.
I will later add SSL to the program.

Any help would greatly appreciated.

Sincerely
eagle-bear

Set up netcat as a listener on some port (say, 12345). Issue a request to that port using wget or curl, and also using your hand-coded client.
See what netcat reports and compare the makeup of your code's request to what the other HTTP clients use. HTTP requests are generally not complex.

--- rod.