Mega Code Archive
Download from URL and MD5 check
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//package com.IsraelPack;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigInteger;
import java.net.URL;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import android.util.Log;
public class Utils {
public static boolean DownloadFromUrl(String url, String fileName) {
try {
BufferedInputStream in = new BufferedInputStream(new URL(url)
.openStream());
FileOutputStream fos = new FileOutputStream(fileName);
BufferedOutputStream bout = new BufferedOutputStream(fos, 1024);
byte[] data = new byte[1024];
int x = 0;
while ((x = in.read(data, 0, 1024)) >= 0) {
bout.write(data, 0, x);
}
bout.close();
in.close();
} catch (IOException e) {
Log.e("IsraelPack", e.getMessage());
return false;
}
return true;
}
public static boolean checkMD5(String md5, String fileName) {
if (md5 == null || md5 == "" || fileName == null) {
return false;
}
String calculatedDigest = calculateMD5(fileName);
if (calculatedDigest == null) {
return false;
}
return calculatedDigest.equalsIgnoreCase(md5);
}
public static String calculateMD5(String fileName) {
File updateFile = new File(fileName);
MessageDigest digest = null;
try {
digest = MessageDigest.getInstance("MD5");
} catch (NoSuchAlgorithmException e) {
return null;
}
InputStream is = null;
try {
is = new FileInputStream(updateFile);
} catch (FileNotFoundException e) {
return null;
}
byte[] buffer = new byte[8192];
int read = 0;
try {
while ((read = is.read(buffer)) > 0) {
digest.update(buffer, 0, read);
}
byte[] md5sum = digest.digest();
BigInteger bigInt = new BigInteger(1, md5sum);
String output = bigInt.toString(16);
// Fill to 32 chars
output = String.format("%32s", output).replace(' ', '0');
return output;
} catch (IOException e) {
throw new RuntimeException("Unable to process file for MD5", e);
} finally {
try {
is.close();
} catch (IOException e) {
throw new RuntimeException(
"Unable to close input stream for MD5 calculation", e);
}
}
}
public static String readFileAsString(String filePath) {
try {
StringBuffer fileData = new StringBuffer(1000);
BufferedReader reader;
reader = new BufferedReader(new FileReader(filePath));
char[] buf = new char[1024];
int numRead = 0;
while ((numRead = reader.read(buf)) != -1) {
String readData = String.valueOf(buf, 0, numRead);
fileData.append(readData);
buf = new char[1024];
}
reader.close();
return fileData.toString();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}
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