Added StaticFileHandler from main

Author: gitnes94

src/main/java/org/example/StaticFileHandler.java

@@ -0,0 +1,56 @@
+package org.example;
+
+import org.example.http.HttpResponseBuilder;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintWriter;
+import java.nio.file.Files;
+import java.util.Map;
+
+public class StaticFileHandler {
+    private final String WEB_ROOT;
+    private byte[] fileBytes;
+    private int statusCode;
+
+    //Constructor for production
+    public StaticFileHandler() {
+        WEB_ROOT = "www";
+    }
+
+    //Constructor for tests, otherwise the www folder won't be seen
+    public StaticFileHandler(String webRoot){
+        WEB_ROOT = webRoot;
+    }
+
+    private void handleGetRequest(String uri) throws IOException {
+
+        File file = new File(WEB_ROOT, uri);
+        if(file.exists()) {
+            fileBytes = Files.readAllBytes(file.toPath());
+            statusCode = 200;
+        } else {
+            File errorFile = new File(WEB_ROOT, "pageNotFound.html");
+            if(errorFile.exists()) {
+                fileBytes = Files.readAllBytes(errorFile.toPath());
+            } else {
+                fileBytes = "404 Not Found".getBytes();
+            }
+            statusCode = 404;
+        }
+    }
+
+    public void sendGetRequest(OutputStream outputStream, String uri) throws IOException{
+        handleGetRequest(uri);
+
+        HttpResponseBuilder response = new HttpResponseBuilder();
+        response.setStatusCode(statusCode);
+        response.setHeaders(Map.of("Content-Type", "text/html; charset=utf-8"));
+        response.setBody(fileBytes);
+        PrintWriter writer = new PrintWriter(outputStream, true);
+        writer.println(response.build());
+
+    }
+
+}