public void doRequest(LocationsData Locations, Socket connection)
{//this section here sets up a new stream to be able to send it to the client, if it takes longer than a second for either the client or this server it will then cut the connection and timeout
NetworkStream socketStream;
socketStream = new NetworkStream(connection);
Console.WriteLine("Connection to client established.");
connection.ReceiveTimeout = 1000;
connection.SendTimeout = 1000;
socketStream.ReadTimeout = 1000;
socketStream.WriteTimeout = 1000;
try
{
bool httpActive = false;//this bool is here to see if the server has recieved a HTTP request from the client
StreamWriter sw = new StreamWriter(socketStream);
StreamReader sr = new StreamReader(socketStream);
string input = sr.ReadLine(); //this will get the first line of input from the client
string[] sections = input.Split(new char[] { ' ' }, 2); //this splits that input into two section after a space
if (input.StartsWith("GET /") || input.StartsWith("PUT /") || input.StartsWith("POST /"))
{ //this if statement checks if it is a HTTP request or not, this is so it skips the future if statements
HTTPRequest(sw, sr, sections, Locations); //this then sends the stream reader, stream writer, sections array, and the Locations dictionary so it can insert data
httpActive = true;
}
else if (sections.Length == 2 & sections[0] == "")//this will check to see what the client has sent to the server and proceed to write it to the console
{
Console.WriteLine("Client sent: Null " + sections[1]);
}
else if (sections[0] == "")
{
Console.WriteLine("Client sent: Null");
}
else if (sections.Length == 2)
{
if (sections[1] == "")
{
Console.WriteLine("Client sent: " + input + " Null");
}
else
{
Console.WriteLine("Client sent: " + input);
}
}
else
{
Console.WriteLine("Client sent: " + input);
}
if (sections.Length == 1 && httpActive == false) //this will check if the client requested a location check
{
Console.WriteLine("\n Client requested a location check. \n"); //this will then write it to the console and ask the LocationsData class to check if it exists
string Location = Locations.checkLocation(sections[0]);
if (Location == "ERROR: no entries found") //if it finds nothing it will then write back to the client that nothing was found
{
sw.WriteLine("ERROR: no entries found");
Console.WriteLine("Server response: ERROR: no entries found \n");
}
else//if the server has found something it will then reply to the client with the data that it has found
{
sw.WriteLine(Location);
if (Location == "")
{
Console.WriteLine("Server response: Null \n");
}
else
{
Console.WriteLine("Server response: " + Location + "\n");
}
}
sw.Flush(); //this is here to send the packet before it is full as it will not be sent otherwise
}
else if (httpActive == false) //if the client has requested a Location Change it will then proceed to change the data stored for the location of that name and send back OK if it has succeeded
{
try
{
Console.WriteLine("\n Client requested a location change. \n");
Locations.addItem(sections[0], sections[1]);
sw.WriteLine("OK");
Console.WriteLine("Server response: OK \n");
sw.Flush();
}
catch
{
Console.WriteLine("Error with adding items to dictionary");//if an error occurs it will then send a message to the client containing that there has been an error
sw.WriteLine("An error occured, please try again.");
sw.Flush();
}
}
}
catch (Exception e)
{
Console.WriteLine("Exception: " + e.ToString());
}
finally
{
socketStream.Close();//once it has completed this it will close the socket and the connection so the thread can also close
connection.Close();
}
}
public void HTTPRequest(StreamWriter sw, StreamReader sr, string[] sections, LocationsData Locations) //this method handles all of the HTTP requests
{
if (sections[1].EndsWith("HTTP/1.0")) //these are divided up through using the end containing HTTP/<Ver.Num.>
{
if (sections[0].StartsWith("POST")) //if it starts with POST this means the client wants to do a location change
{
try
{
string name = sections[1].TrimStart('/'); //this will then trim the start of the line to get the name from it
string result = "";
for (int i = 0; i < 3; i++) //this will then loop until it gets to the line required to get the location data
{
result = sr.ReadLine();
}
Console.WriteLine("\n Client requested a http 1.0 location change. \n");
Locations.addItem(name, result);//this will then add the data to the dictionary and send back to the user that it has successfully added/changed the data
sw.WriteLine("HTTP/1.0 200 OK");
sw.WriteLine("Content-Type: text/plain");
sw.WriteLine();
sw.Flush();
}
catch
{
Console.WriteLine("Error with adding items to dictionary");
sw.WriteLine("An error occured, please try again.");
sw.Flush();
}
}
else
{
string name = sections[1].Replace("/?", ""); //this is to be able to get the name as it has /? infront of it
Console.WriteLine("\n Client requested a HTTP 1.0 location check. \n");
string Location = Locations.checkLocation(name); //this sends off the name to the dictionary to get the location of the name
if (Location == "ERROR: no entries found") //if there is nothing found it sends a 404
{
sw.WriteLine("HTTP/1.0 404 Not Found");
sw.WriteLine("Content-Type: text/plain");
}
else
{
sw.WriteLine("HTTP/1.0 200 OK");//if there is something found the server will then send location in the correct format
sw.WriteLine("Content-Type: text/plain");
sw.WriteLine();
sw.WriteLine(Location);
if (Location == "")
{
Console.WriteLine("Server response: Null \n");
}
else
{
Console.WriteLine("Server response: " + Location + "\n");
}
}
sw.Flush();
}
}
else if (sections[1].EndsWith("HTTP/1.1")) //these are divided up through using the end containing HTTP/<Ver.Num.>
{
if (sections[0].StartsWith("POST")) //if it starts with POST this means the client wants to do a location change
{
try
{
string result = "";
for (int i = 0; i < 4; i++)//this will loop through 4 times to be able to get the location and name information
{
result = sr.ReadLine();
}
string[] resultSections = result.Split(new char[] { '&' }, 2);
string name = resultSections[0].Replace("name=", "");
string location = resultSections[1].Replace("location=", "");
Console.WriteLine("\n Client requested a http 1.1 location change. \n"); //this uses .Replace as it is the most efficient way of being able to remove the name= and location= and extra the information needed
Locations.addItem(name, location);
sw.WriteLine("HTTP/1.1 200 OK"); //it will then send that it has successfully entered it into the dictionary
sw.WriteLine("Content-Type: text/plain");
sw.WriteLine();
sw.Flush();
}
catch
{
Console.WriteLine("Error with adding items to dictionary");
sw.WriteLine("An error occured, please try again.");
sw.Flush();
}
}
else
{
string name = sections[1].Replace("/?name=", "");//this will extract the name from the message
name = name.Replace(" HTTP/1.1", "");
Console.WriteLine("\n Client requested a HTTP 1.1 location check. \n");
string Location = Locations.checkLocation(name); //this will then check the dictionary for the name and anything associated with it
if (Location == "ERROR: no entries found") //if nothing is found it will return a 404
{
sw.WriteLine("HTTP/1.1 404 Not Found");
sw.WriteLine("Content-Type: text/plain");
sw.WriteLine();
}
else
{
sw.WriteLine("HTTP/1.1 200 OK");//if something is found it will then send a message back to the connection with the location attatched to it
sw.WriteLine("Content-Type: text/plain");
sw.WriteLine();
sw.WriteLine(Location);
if (Location == "")
{
Console.WriteLine("Server response: Null \n");
}
else
{
Console.WriteLine("Server response: " + Location + "\n");
}
}
sw.Flush();
}
}
else
{
string name = sections[1].TrimStart('/');
if (sections[0].StartsWith("PUT"))//if it starts with PUT this means the client wants to do a location change
{
{
try
{
string result = "";
for (int i = 0; i < 2; i++)
{
result = sr.ReadLine();
}
Console.WriteLine("\n Client requested a http 0.9 location change. \n"); //this will get name from the first line by getting rid of the / and then the location from the final line and send them to the dictionary
Locations.addItem(name, result);
sw.WriteLine("HTTP/0.9 200 OK"); //it will then reply with a 200 message to signify that it has succesfully added it to the dictionary
sw.WriteLine("Content-Type: text/plain");
sw.WriteLine();
sw.Flush();
}
catch
{
Console.WriteLine("Error with adding items to dictionary");
sw.WriteLine("An error occured, please try again.");
sw.Flush();
}
}
}
else
{
Console.WriteLine("\n Client requested a HTTP 0.9 location check. \n");
string Location = Locations.checkLocation(name); //the name is on the first line at the start trimmed from / once again
if (Location == "ERROR: no entries found") //If nothing is found it send a 404 message
{
sw.WriteLine("HTTP/0.9 404 Not Found");
sw.WriteLine("Content-Type: text/plain");
sw.WriteLine();
}
else
{
sw.WriteLine("HTTP/0.9 200 OK");//if it finds the location in the dictionary it will send a 200 OK message with the location on the end of it
sw.WriteLine("Content-Type: text/plain");
sw.WriteLine();
sw.WriteLine(Location);
if (Location == "")
{
Console.WriteLine("Server response: Null \n");
}
else
{
Console.WriteLine("Server response: " + Location + "\n");
}
}
sw.Flush();
}
}
}
