In c# complete the code in the TODO area of the code below. This can be done in
ID: 3918696 • Letter: I
Question
In c# complete the code in the TODO area of the code below. This can be done in any of the following ways. WebRequest and HttpWebResponse classes, a WebClient object, or an HTTPClient object.
In this lab, you will be writing your own C# web client that communicates to a web server and downloads a short message. There are multiple ways to implement the web client, a few of them being to utilize the WebRequest and HttpWebResponse classes, a WebClient object, or an HTTPClient object. Your web client should use a download method to contact the web server and display the server's response to the user. The template code already creates a working web server for you, so you'll only need to handle the client-side code.
Network.cs
using System.IO;
using System.Net;
using System.Text;
using System;
using System.Threading;
namespace Networking
{
class Program
{
static void Main()
{
//Start the server
Server();
Console.WriteLine(" ---------------------------------------------------------------- Press any key to start the client...");
Console.ReadKey(true);
//Start the client
WebClient();
//Wrap up
Console.WriteLine(" -------Press Enter key when done.---------");
Console.ReadKey(true);
}
async static void Server()
{
//Prompt the user for the URI and port
Console.WriteLine(" What is the URI of the server? (http://localhost) ");
string serverURI = Console.ReadLine();
Console.WriteLine(" And what is the port number? (1300) ");
string portNum = Console.ReadLine();
try
{
//Creates the listener; this is the part that "listens" for a client to connect
HttpListener listener = new HttpListener();
listener.Prefixes.Add(serverURI + ":" + portNum + "/");
//Start the listener
Console.WriteLine(" Starting Server...");
listener.Start();
Console.WriteLine("Server Started ");
while (true)
{
//The server code will wait right here for a client to connect; in the meantime, control returns to the main method.
//When a client does connect, this code will resume until it loops back around to "await" again.
HttpListenerContext context = await listener.GetContextAsync();
//Create a response to send back to the client
string msg = " Message from Server: Congrats! You have started a server and accessed that server with your client!";
context.Response.ContentLength64 = Encoding.UTF8.GetByteCount(msg);
context.Response.StatusCode = (int)HttpStatusCode.OK;
//Convert that response into a stream and write it with a StreamWriter
using (Stream stream = context.Response.OutputStream)
{
using (StreamWriter writer = new StreamWriter(stream))
{
writer.Write(msg);
}
}
Console.WriteLine("Message sent to client");
}
}
catch (Exception err)
{
//If any error occurs, write its information to the console
//The server will then shut down
Console.WriteLine(err.ToString());
}
}
static void WebClient()
{
//TODO: Connect to the server you set up previously, send it a message, and output its response to the user.
}
}
}
Explanation / Answer
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
namespace WebClient
{
class Program
{
static string ServerPath = null;
async static void Server()
{
//Prompt the user for the URI and port
Console.WriteLine(" What is the URI of the server? (http://localhost) ");
string serverURI = Console.ReadLine();
Console.WriteLine(" And what is the port number? (1300) ");
string portNum = Console.ReadLine();
try
{
//Creates the listener; this is the part that "listens" for a client to connect
HttpListener listener = new HttpListener();
Program.ServerPath = serverURI + ":" + portNum + "/";
listener.Prefixes.Add(Program.ServerPath);
//Start the listener
Console.WriteLine(" Starting Server...");
listener.Start();
Console.WriteLine("Server Started ");
while (true)
{
//The server code will wait right here for a client to connect; in the meantime, control returns to the main method.
//When a client does connect, this code will resume until it loops back around to "await" again.
HttpListenerContext context = await listener.GetContextAsync();
//Create a response to send back to the client
string msg = " Message from Server: Congrats! You have started a server and accessed that server with your client!";
context.Response.ContentLength64 = Encoding.UTF8.GetByteCount(msg);
context.Response.StatusCode = (int)HttpStatusCode.OK;
//Convert that response into a stream and write it with a StreamWriter
using (Stream stream = context.Response.OutputStream)
{
using (StreamWriter writer = new StreamWriter(stream))
{
writer.Write(msg);
}
}
Console.WriteLine("Message sent to client");
}
}
catch (Exception err)
{
//If any error occurs, write its information to the console
//The server will then shut down
Console.WriteLine(err.ToString());
}
}
static void WebClient()
{
//TODO: Connect to the server you set up previously, send it a message, and output its response to the user.
using (HttpClient client = new HttpClient()) {
client.BaseAddress =new Uri(Program.ServerPath);
HttpResponseMessage Responce= client.GetAsync("/").Result;
string result= Responce.Content.ReadAsStringAsync().Result;
Console.WriteLine("Client is connected successfully.");
Console.WriteLine("Massege is getting from serveris shown below....");
Console.WriteLine(result);
Console.WriteLine("Client is disconnected successfully.");
}
}
static void Main(string[] args)
{
//Start the server
Server();
Console.WriteLine(" ---------------------------------------------------------------- Press any key to start the client...");
Console.ReadKey(true);
//Start the client
WebClient();
//Wrap up
Console.WriteLine(" -------Press Enter key when done.---------");
Console.ReadKey(true);
}
}
}
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