Announcement

**Michael Seidel** · 10.06.2001, 16:20

Schau' Dir das hier genauer an:

import java.net.*;
import java.io.*;
import java.lang.*;
import java.util.*;

public class HTTPGet {

// Length of buffer for input-stream reading
public static final int READ_BUFFER_LENGTH = 8292;
// Default filename for directory list (if any) returned by Web-Server
public static final String DEFAULT_FILENAME = "index.html";
// Time at start of connection
public static long startTime=0;
// Size of remote file
public static long fileSize=0;
// Progress output string
public static String progress = new String();
// Size of Progress line output
public static int outputLength=0;

public static void main (String args[]) {

System.out.println("HTTPGet. Example of using the HttpURLConnection-Class.\n");
if ( args.length == 0 ) {
System.out.println("Usage: java HTTPGet <url>");
return;
}

try {
// Get current Time
startTime = System.currentTimeMillis();
// Get the URL-String passed on command-line
String url = new String(args[0]).trim();
// Create a URL-Object for the URL specified
URL docURL = new URL(url);
// Connect to remote-server
HttpURLConnection remote = (HttpURLConnection)docURL.openConnection();

// Exit if requested URL does not exist
int response = remote.getResponseCode();
if ( response == HttpURLConnection.HTTP_NOT_FOUND ) {
System.out.println("\nThe requested URL "+url+" does not exist.");
System.exit(1);
}
// Exit if access not allowed
if ( response == HttpURLConnection.HTTP_FORBIDDEN ||
response == HttpURLConnection.HTTP_UNAUTHORIZED) {
System.out.println("\nAccess forbidden: "+url+" is passwort- or read protected.");
System.exit(1);
}

// Get the size of the remote object (file on remote server)
// Web server returns -1 if directory-list returned
fileSize=(remote.getContentLength()!=-1)?remote.getContentLength():0;

// Extract the filename from URL for local storage
String dstFilename = args[1]; //url.substring(url.lastIndexOf('/')+1);

// Set default-filename in the case remote-directory was requested
// The Web-Server returns a HTML-file with directory entries
if (dstFilename.indexOf(".") == -1)
dstFilename = DEFAULT_FILENAME;

// Create local file for output
File dstFile = new File(dstFilename);
dstFile.createNewFile();

// Initialize input- and output streams
DataInputStream in = new DataInputStream(remote.getInputStream());
DataOutputStream out = new DataOutputStream(new FileOutputStream(dstFile));

// Create input-buffer for reading
byte[] buffer = new byte[READ_BUFFER_LENGTH+1];
// bytesReadTotal stores the total amount of bytes read
int bytesReadTotal = 0;
// bytesRead stores the amount of bytes read on each loop
int bytesRead = 0;

// Read input stream and store the data in local file
// in.read returns -1 when EOF reached
long tmpTime = System.currentTimeMillis();
while ((bytesRead=in.read(buffer, 0, READ_BUFFER_LENGTH)) != -1) {
out.write(buffer, 0, bytesRead);
bytesReadTotal += bytesRead;
// Display transfer status every second
if( ((System.currentTimeMillis()-tmpTime)/1000) >= 1) {
showProgress(bytesReadTotal);
tmpTime = System.currentTimeMillis();
}
}
clearProgress();

// Close the streams
out.flush();
out.close();
in.close();

// Output request summary
long time = (System.currentTimeMillis()-startTime)/1000;
long speed = bytesReadTotal/ (time==0?1:time);
System.out.println("Local file : " + dstFilename + "\n" +
"File size : " + bytesReadTotal+ " bytes\n" +

**Michael Seidel** · 10.06.2001, 16:22

Ups! Sieht ziemlich Sch... aus!
Kopiere es in eine Datei und formatiere die Ausgabe etwas um.
So wie es hier steht ist es kaum lesbar

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