# HTTP / Socket Server
### KHTTPServerThread / KSocketThread Class Overview
* **Socket and HTTP**\
Supports raw TCP/IP socket applications or HTTP server applications (for web or REST services).
* **TLS and Non-TLS Client Connection Support**\
Enables both secure (TLS) and non-secure client connections to server applications, providing flexibility for various networking scenarios.
* **Thread Management**\
Loads, starts, and manages user classes to dynamically handle socket or HTTP clients.
* **Client and Basic Authentication**\
Allows server applications to differentiate between authenticated and non-authenticated clients. Use the getAuthenticatedClient() method to verify a valid client name..
* **Flexible Data Read/Write Methods**\
Includes efficient methods for reading and writing data in various formats, such as byte\[], char\[], String, and line-based input.
HTTP Server Example: Simple Webserver
```java
try (KSocketServer httpServer = new KSocketServer(8080, KHTTPServerThreadSample.class)) {
if (!httpServer.isActive()) {
System.out.println("The HTTP server could not be started: " + httpServer.getLastError());
System.exit(1);
}
System.out.println("HTTP server ready on port 8080 - Will terminate after 3 minutes");
K.waitMinutes(3);
System.out.println("HTTP server terminating");
}
```
```java
public class KHTTPServerThreadSample extends KHTTPServerThread {
public KHTTPServerThreadSample(Socket argSocket) {
super(argSocket);
}
@Override
public void get(String argURL) {
sendFile(argURL);
}
}
```
Socket Server Example: Echo Server
```java
// Start echo server on port 8080
try (KServerSocket server = New KServerSocket(8080, KSocketServerThreadSample.class)) {
KLog.abort(!server.isActive(), "Unable to start server: " + server.getLastError());
// Let client connect (e.g. "nc localhost 8080" or "telnet localhost 8080")
K.waitMinutes(5);
}
```
```java
public class KSocketServerThreadSample extends KSocketServerThread {
public KSocketServerThreadSample(Socket argSocket) {
super(argSocket);
}
public void run() {
KLog.info("Upper-Case-Echo-Server started");
String newLine = K.getLineSeparator();
String clientData = null;
write((!isSecuredConnection() ? "Non-" : "") + "TLS Upper-Case-Echo-Server ready" + newLine);
while ((clientData = readLine()) != null) {
write(clientData.toUpperCase() + newLine);
}
close();
KLog.info("Upper-Case-Echo-Server terminated");
}
}
```
### Architecture Overview
