HTTP-Server (Network Application)

Requirements

• Implementing part of the HTTP protocol.
        - Threaded (multiple clients).
        - GET / POST / HEAD Methods.
        - Error Handling (Page Not found - Bad Request - Redirection - Internal Server Error).
  

Starting the Server

• Accepting multiple clients by starting a thread for each accepted connection.
• Keep on accepting requests from the remote client until the client closes the socket (sends a zero length message).
• For each received request, the server must reply with a response.

Receiving Request

• The received request must be a valid HTTP request, else return 400 Bad Request.
        - Checking single space separating the request line parameters (Method URI HTTPVersion).
        - Checking blank line separating the header lines and the content, even if the content is empty.
        - Checking valid URI.
        - Checking at least request line and host header and blank lines exist.

Response Headers

• The response should include the following headers:
        - Content-Type (We will use only text/html).
        - Content-Length (The length of the content).
        - Date (Current DateTime of the server).
        - Location (Only if there is redirection).
  

Handling Request

• Using Configuration.RootPath, map the URI to the physical path (See below line for an Example).
  

configuration.RootPath= “c:\intepub\wwwroot\fcis1”  and URI = “/aboutus.html” then physical path= “c:\intepub\wwwroot\fcis1\aboutus.html”

Redirection

• If the URI exists in the configuration.RedirectionRules, then return 301 Redirection Error and add location header with the new redirected URI.
• The content should be the content of the static page “redirect.html”.

Not Found

• If the physical file is not found return 404 Not Found error.
• The content should be the content of the static page “Notfound.html”

Bad Request

• If there is any parsing error in the request, return 400 Bad Request Error.
• The content should be loaded with the content of the static page “BadRequest.html”.

Internal Server Error

• If there is any unknown exception, return 500 Internal Server Error.
• The content should be the content of the static page “InternalError.html”.

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Getting Started

1. Put inetpub folder in C Directory
2. In Server class line 193 change the rootfolder to your downloads folder path.
3. In server class line 195 change the xmlDocumentpath to your xml file path.

Server Demo

To Run and Test the HTTP Servver, here are some links to use:

1. http://localhost:1000/aboutus.html (redirection)
2. http://localhost:1000/main.html (main)
3. http://localhost:1000/blabla.html (404 page)
4. http://localhost:1000/formpage.html (post method try to submit the form and see the changes of the xml file)

Copyrights

• Nada Mohamed - Nada Anies
• KAN Org.
• University of Ain Shams, Egypt