Inserimento codice relativo a java.net URL e HttpUrlConnection

2023-03-10 15:47:15 +01:00
parent 75accbd36a
commit 89c209b9e9
19 changed files with 2079 additions and 6 deletions
--- a/ClientHttp/src/clienthttp/ClientHttp.java
+++ b/ClientHttp/src/clienthttp/ClientHttp.java
@@ -0,0 +1,65 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Main.java to edit this template
+ */
+package clienthttp;
+
+import java.io.BufferedReader;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+public class ClientHttp {
+    
+    private static String sitoUrl = "http://server.mirimatcode.eu/file";
+    private static URL risorsa;
+    private static HttpURLConnection connessione;
+
+    public static void main(String[] args) {
+        try {
+            /*
+                Download di un file mediante richiesta HTTP, se il file è un txt stampa a video il contenuto
+                altrimenti crea una copia del file in locale
+            */
+            System.out.println("Mi appresto a scaricare il file di testo");
+            risorsa = new URL(sitoUrl);
+            
+            connessione = (HttpURLConnection) risorsa.openConnection();
+            
+            String content = connessione.getContentType() == null ? "application/unk" : connessione.getContentType();
+            
+            System.out.println("Valore " + content);
+            
+            //System.out.println("Content type restituito: " + content + "\n" + " Oggetto restituito: " + connessione.getContent().getClass().getName());
+            
+            if(content.equals("text/plain")) {
+                BufferedReader buf = new BufferedReader(new InputStreamReader((InputStream) connessione.getContent()));
+                System.out.println("Frase: " + buf.readLine());
+                buf.close();
+            } else {
+                String estensione = content.split("/")[1];
+                FileOutputStream streamFile = new FileOutputStream("file_ricevuto." + estensione);
+                
+                System.out.println("Estensione: " + estensione);
+                
+                streamFile.write(((InputStream) connessione.getContent()).readAllBytes());
+                streamFile.flush();
+                streamFile.close();
+            }
+        } catch (MalformedURLException ex) {
+            System.out.println("Errore Malformed: " + ex.getMessage());
+        } catch (FileNotFoundException ex) {
+            System.out.println("Errore FileNotFound: " + ex.getMessage());
+        } catch (IOException ex) {
+            System.out.println("Errore IO: " + ex.getMessage());
+        } 
+    }
+    
+}