Add automatically detection of mime-type

Author: simonwep

src/express/http/Response.java

@@ -2,6 +2,7 @@
 
 import com.sun.net.httpserver.Headers;
 import com.sun.net.httpserver.HttpExchange;
+import express.ExpressUtils;
 import express.http.cookie.Cookie;
 
 import java.io.File;
@@ -93,14 +94,14 @@ public void send(String s) {
 
   /**
    * Send an entire file as response
+   * The mime type will be automatically detected.
    *
-   * @param file        The file.
-   * @param contentType Content type.
+   * @param file The file.
    */
-  public void send(File file, String contentType) {
+  public void send(File file) {
     if (checkIfClosed()) return;
     this.contentLength += file.length();
-    this.contentType = contentType;
+    this.contentType = ExpressUtils.getContentType(file);
     sendHeaders();
 
     try {

src/express/middleware/Static.java

@@ -34,10 +34,8 @@ public Static(String directoryPath) {
   public void handle(Request req, Response res) {
     File reqFile = new File(PATH + req.getURI().getPath());
 
-    if (reqFile.exists()) {
-      String contentType = ExpressUtils.getContentType(reqFile);
-      res.send(reqFile, contentType);
-    }
+    if (reqFile.exists())
+      res.send(reqFile);
   }