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AppletLoader: fix to ensure a jar file download is attempted 3 times even if it throws some download exception.

This commit is contained in:
kappa1 2012-05-08 19:38:17 +00:00
parent 46922c0299
commit 22e0831d8a
1 changed files with 90 additions and 74 deletions
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164
src/java/org/lwjgl/util/applet/AppletLoader.java
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@ -211,11 +211,8 @@ public class AppletLoader extends Applet implements Runnable, AppletStub {
/** used to calculate length of progress bar */
protected volatile int percentage;
/** current size of download in bytes */
protected int currentSizeDownload;
/** total size of download in bytes */
protected int totalSizeDownload;
protected int totalDownloadSize;
/** current size of extracted in bytes */
protected int currentSizeExtract;
@ -1391,7 +1388,7 @@ public class AppletLoader extends Applet implements Runnable, AppletStub {
if (fileSizes[i] >= 0) {
synchronized (sync) {
totalSizeDownload += fileSizes[i];
totalDownloadSize += fileSizes[i];
}
}
@ -1438,6 +1435,7 @@ public class AppletLoader extends Applet implements Runnable, AppletStub {
URLConnection urlconnection;
int initialPercentage = percentage = 15;
int amountDownloaded = 0;
// download each jar
byte buffer[] = new byte[65536];
@ -1449,87 +1447,105 @@ public class AppletLoader extends Applet implements Runnable, AppletStub {
int unsuccessfulAttempts = 0;
int maxUnsuccessfulAttempts = 3;
boolean downloadFile = true;
String currentFile = getFileName(urlList[i]);
// download the jar a max of 3 times
while(downloadFile) {
downloadFile = false;
debug_sleep(2000);
urlconnection = urlList[i].openConnection();
urlconnection.setUseCaches(false);
if (urlconnection instanceof HttpURLConnection) {
urlconnection.setRequestProperty("Cache-Control", "no-store,max-age=0,no-cache");
urlconnection.connect();
}
String currentFile = getFileName(urlList[i]);
InputStream inputstream = getJarInputStream(currentFile, urlconnection);
FileOutputStream fos = new FileOutputStream(path + currentFile);
int bufferSize;
long downloadStartTime = System.currentTimeMillis();
int downloadedAmount = 0;
int fileSize = 0;
String downloadSpeedMessage = "";
try {
while ((bufferSize = inputstream.read(buffer, 0, buffer.length)) != -1) {
debug_sleep(10);
fos.write(buffer, 0, bufferSize);
currentSizeDownload += bufferSize;
fileSize += bufferSize;
percentage = initialPercentage + ((currentSizeDownload * 45) / totalSizeDownload);
subtaskMessage = "Retrieving: " + currentFile + " " + ((currentSizeDownload * 100) / totalSizeDownload) + "%";
try {
urlconnection = urlList[i].openConnection();
urlconnection.setUseCaches(false);
downloadedAmount += bufferSize;
long timeLapse = System.currentTimeMillis() - downloadStartTime;
// update only if a second or more has passed
if (timeLapse >= 1000) {
// get kb/s, nice that bytes/millis is same as kilobytes/seconds
float downloadSpeed = (float) downloadedAmount / timeLapse;
// round to two decimal places
downloadSpeed = ((int)(downloadSpeed*100))/100f;
// set current speed message
downloadSpeedMessage = " - " + downloadSpeed + " KB/sec";
// reset downloaded amount
downloadedAmount = 0;
// reset start time
downloadStartTime = System.currentTimeMillis();
if (urlconnection instanceof HttpURLConnection) {
urlconnection.setRequestProperty("Cache-Control", "no-store,max-age=0,no-cache");
urlconnection.connect();
}
InputStream inputstream = getJarInputStream(currentFile, urlconnection);
FileOutputStream fos = new FileOutputStream(path + currentFile);
int bufferSize;
int currentDownload = 0;
long downloadStartTime = System.currentTimeMillis();
int downloadedAmount = 0;
String downloadSpeedMessage = "";
try {
while ((bufferSize = inputstream.read(buffer, 0, buffer.length)) != -1) {
debug_sleep(10);
fos.write(buffer, 0, bufferSize);
currentDownload += bufferSize;
int totalDownloaded = amountDownloaded + currentDownload;
percentage = initialPercentage + ((totalDownloaded * 45) / totalDownloadSize);
subtaskMessage = "Retrieving: " + currentFile + " " + ((totalDownloaded * 100) / totalDownloadSize) + "%";
downloadedAmount += bufferSize;
long timeLapse = System.currentTimeMillis() - downloadStartTime;
// update only if a second or more has passed
if (timeLapse >= 1000) {
// get kb/s, nice that bytes/millis is same as kilobytes/seconds
float downloadSpeed = (float) downloadedAmount / timeLapse;
// round to two decimal places
downloadSpeed = ((int)(downloadSpeed*100))/100f;
// set current speed message
downloadSpeedMessage = " - " + downloadSpeed + " KB/sec";
// reset downloaded amount
downloadedAmount = 0;
// reset start time
downloadStartTime = System.currentTimeMillis();
}
subtaskMessage += downloadSpeedMessage;
}
subtaskMessage += downloadSpeedMessage;
} finally {
inputstream.close();
fos.close();
}
} finally {
inputstream.close();
fos.close();
// download complete, verify if it was successful
if (urlconnection instanceof HttpURLConnection) {
if (currentDownload == fileSizes[i]) {
// successful download
}
else if (fileSizes[i] <= 0 && currentDownload != 0) {
// If contentLength for fileSizes[i] <= 0, we don't know if the download
// is complete. We're going to guess the download is complete.
}
else {
throw new Exception("size mismatch on download of " + currentFile +
" expected " + fileSizes[i] + " got " + currentDownload);
}
}
// successful file download, update total amount downloaded
amountDownloaded += fileSizes[i];
} catch (Exception e) {
e.printStackTrace(); // output exception to console
// Failed to download the file
unsuccessfulAttempts++;
// download failed try again
if (unsuccessfulAttempts < maxUnsuccessfulAttempts) {
downloadFile = true;
Thread.sleep(100); // wait a bit before retrying
}
else {
// retry attempts exhasted, download failed
throw new Exception("failed to download " + currentFile +
" after " + maxUnsuccessfulAttempts + " attempts");
}
}
// download complete, verify if it was successful
if (urlconnection instanceof HttpURLConnection) {
if (fileSize == fileSizes[i]) {
// successful download
}
else if (fileSizes[i] <= 0) {
// If contentLength for fileSizes[i] <= 0, we don't know if the download
// is complete. We're going to guess the download is complete.
}
else {
unsuccessfulAttempts++;
// download failed try again
if (unsuccessfulAttempts < maxUnsuccessfulAttempts) {
downloadFile = true;
currentSizeDownload -= fileSize; // reset progress bar
}
else {
// retry attempts exhasted, download failed
throw new Exception("failed to download " + currentFile);
}
}
}
}
}
subtaskMessage = "";