DownloadThreadpublic class DownloadThread extends Thread
| Fields Summary |
|---|
| private android.content.Context | mContext | | private DownloadInfo | mInfo |
| Methods Summary |
|---|
| private void | notifyDownloadCompleted(int status, boolean countRetry, int retryAfter, int redirectCount, boolean gotData, java.lang.String filename, java.lang.String uri, java.lang.String mimeType)Stores information about the completed download, and notifies the initiating application.
notifyThroughDatabase(
status, countRetry, retryAfter, redirectCount, gotData, filename, uri, mimeType);
if (Downloads.isStatusCompleted(status)) {
notifyThroughIntent();
}
| | private void | notifyThroughDatabase(int status, boolean countRetry, int retryAfter, int redirectCount, boolean gotData, java.lang.String filename, java.lang.String uri, java.lang.String mimeType)
ContentValues values = new ContentValues();
values.put(Downloads.STATUS, status);
values.put(Downloads._DATA, filename);
if (uri != null) {
values.put(Downloads.URI, uri);
}
values.put(Downloads.MIMETYPE, mimeType);
values.put(Downloads.LAST_MODIFICATION, System.currentTimeMillis());
values.put(Constants.RETRY_AFTER___REDIRECT_COUNT, retryAfter + (redirectCount << 28));
if (!countRetry) {
values.put(Constants.FAILED_CONNECTIONS, 0);
} else if (gotData) {
values.put(Constants.FAILED_CONNECTIONS, 1);
} else {
values.put(Constants.FAILED_CONNECTIONS, mInfo.numFailed + 1);
}
mContext.getContentResolver().update(
ContentUris.withAppendedId(Downloads.CONTENT_URI, mInfo.id), values, null, null);
| | private void | notifyThroughIntent()Notifies the initiating app if it requested it. That way, it can know that the
download completed even if it's not actively watching the cursor.
Uri uri = Uri.parse(Downloads.CONTENT_URI + "/" + mInfo.id);
mInfo.sendIntentIfRequested(uri, mContext);
| | public void | run()Executes the download in a separate thread
Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
int finalStatus = Downloads.STATUS_UNKNOWN_ERROR;
boolean countRetry = false;
int retryAfter = 0;
int redirectCount = mInfo.redirectCount;
String newUri = null;
boolean gotData = false;
String filename = null;
String mimeType = sanitizeMimeType(mInfo.mimetype);
FileOutputStream stream = null;
AndroidHttpClient client = null;
PowerManager.WakeLock wakeLock = null;
Uri contentUri = Uri.parse(Downloads.CONTENT_URI + "/" + mInfo.id);
try {
boolean continuingDownload = false;
String headerAcceptRanges = null;
String headerContentDisposition = null;
String headerContentLength = null;
String headerContentLocation = null;
String headerETag = null;
String headerTransferEncoding = null;
byte data[] = new byte[Constants.BUFFER_SIZE];
int bytesSoFar = 0;
PowerManager pm = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, Constants.TAG);
wakeLock.acquire();
filename = mInfo.filename;
if (filename != null) {
if (!Helpers.isFilenameValid(filename)) {
finalStatus = Downloads.STATUS_FILE_ERROR;
notifyDownloadCompleted(
finalStatus, false, 0, 0, false, filename, null, mInfo.mimetype);
return;
}
// We're resuming a download that got interrupted
File f = new File(filename);
if (f.exists()) {
long fileLength = f.length();
if (fileLength == 0) {
// The download hadn't actually started, we can restart from scratch
f.delete();
filename = null;
} else if (mInfo.etag == null && !mInfo.noIntegrity) {
// Tough luck, that's not a resumable download
if (Config.LOGD) {
Log.d(Constants.TAG,
"can't resume interrupted non-resumable download");
}
f.delete();
finalStatus = Downloads.STATUS_PRECONDITION_FAILED;
notifyDownloadCompleted(
finalStatus, false, 0, 0, false, filename, null, mInfo.mimetype);
return;
} else {
// All right, we'll be able to resume this download
stream = new FileOutputStream(filename, true);
bytesSoFar = (int) fileLength;
if (mInfo.totalBytes != -1) {
headerContentLength = Integer.toString(mInfo.totalBytes);
}
headerETag = mInfo.etag;
continuingDownload = true;
}
}
}
int bytesNotified = bytesSoFar;
// starting with MIN_VALUE means that the first write will commit
// progress to the database
long timeLastNotification = 0;
client = AndroidHttpClient.newInstance(userAgent());
if (stream != null && mInfo.destination == Downloads.DESTINATION_EXTERNAL
&& !DrmRawContent.DRM_MIMETYPE_MESSAGE_STRING
.equalsIgnoreCase(mimeType)) {
try {
stream.close();
stream = null;
} catch (IOException ex) {
if (Constants.LOGV) {
Log.v(Constants.TAG, "exception when closing the file before download : " +
ex);
}
// nothing can really be done if the file can't be closed
}
}
/*
* This loop is run once for every individual HTTP request that gets sent.
* The very first HTTP request is a "virgin" request, while every subsequent
* request is done with the original ETag and a byte-range.
*/
http_request_loop:
while (true) {
// Prepares the request and fires it.
HttpGet request = new HttpGet(mInfo.uri);
if (Constants.LOGV) {
Log.v(Constants.TAG, "initiating download for " + mInfo.uri);
}
if (mInfo.cookies != null) {
request.addHeader("Cookie", mInfo.cookies);
}
if (mInfo.referer != null) {
request.addHeader("Referer", mInfo.referer);
}
if (continuingDownload) {
if (headerETag != null) {
request.addHeader("If-Match", headerETag);
}
request.addHeader("Range", "bytes=" + bytesSoFar + "-");
}
HttpResponse response;
try {
response = client.execute(request);
} catch (IllegalArgumentException ex) {
if (Constants.LOGV) {
Log.d(Constants.TAG, "Arg exception trying to execute request for " +
mInfo.uri + " : " + ex);
} else if (Config.LOGD) {
Log.d(Constants.TAG, "Arg exception trying to execute request for " +
mInfo.id + " : " + ex);
}
finalStatus = Downloads.STATUS_BAD_REQUEST;
request.abort();
break http_request_loop;
} catch (IOException ex) {
if (!Helpers.isNetworkAvailable(mContext)) {
finalStatus = Downloads.STATUS_RUNNING_PAUSED;
} else if (mInfo.numFailed < Constants.MAX_RETRIES) {
finalStatus = Downloads.STATUS_RUNNING_PAUSED;
countRetry = true;
} else {
if (Constants.LOGV) {
Log.d(Constants.TAG, "IOException trying to execute request for " +
mInfo.uri + " : " + ex);
} else if (Config.LOGD) {
Log.d(Constants.TAG, "IOException trying to execute request for " +
mInfo.id + " : " + ex);
}
finalStatus = Downloads.STATUS_HTTP_DATA_ERROR;
}
request.abort();
break http_request_loop;
}
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode == 503 && mInfo.numFailed < Constants.MAX_RETRIES) {
if (Constants.LOGVV) {
Log.v(Constants.TAG, "got HTTP response code 503");
}
finalStatus = Downloads.STATUS_RUNNING_PAUSED;
countRetry = true;
Header header = response.getFirstHeader("Retry-After");
if (header != null) {
try {
if (Constants.LOGVV) {
Log.v(Constants.TAG, "Retry-After :" + header.getValue());
}
retryAfter = Integer.parseInt(header.getValue());
if (retryAfter < 0) {
retryAfter = 0;
} else {
if (retryAfter < Constants.MIN_RETRY_AFTER) {
retryAfter = Constants.MIN_RETRY_AFTER;
} else if (retryAfter > Constants.MAX_RETRY_AFTER) {
retryAfter = Constants.MAX_RETRY_AFTER;
}
retryAfter += Helpers.rnd.nextInt(Constants.MIN_RETRY_AFTER + 1);
retryAfter *= 1000;
}
} catch (NumberFormatException ex) {
// ignored - retryAfter stays 0 in this case.
}
}
request.abort();
break http_request_loop;
}
if (statusCode == 301 ||
statusCode == 302 ||
statusCode == 303 ||
statusCode == 307) {
if (Constants.LOGVV) {
Log.v(Constants.TAG, "got HTTP redirect " + statusCode);
}
if (redirectCount >= Constants.MAX_REDIRECTS) {
if (Constants.LOGV) {
Log.d(Constants.TAG, "too many redirects for download " + mInfo.id +
" at " + mInfo.uri);
} else if (Config.LOGD) {
Log.d(Constants.TAG, "too many redirects for download " + mInfo.id);
}
finalStatus = Downloads.STATUS_TOO_MANY_REDIRECTS;
request.abort();
break http_request_loop;
}
Header header = response.getFirstHeader("Location");
if (header != null) {
if (Constants.LOGVV) {
Log.v(Constants.TAG, "Location :" + header.getValue());
}
newUri = new URI(mInfo.uri).resolve(new URI(header.getValue())).toString();
++redirectCount;
finalStatus = Downloads.STATUS_RUNNING_PAUSED;
request.abort();
break http_request_loop;
}
}
if ((!continuingDownload && statusCode != Downloads.STATUS_SUCCESS)
|| (continuingDownload && statusCode != 206)) {
if (Constants.LOGV) {
Log.d(Constants.TAG, "http error " + statusCode + " for " + mInfo.uri);
} else if (Config.LOGD) {
Log.d(Constants.TAG, "http error " + statusCode + " for download " +
mInfo.id);
}
if (Downloads.isStatusError(statusCode)) {
finalStatus = statusCode;
} else if (statusCode >= 300 && statusCode < 400) {
finalStatus = Downloads.STATUS_UNHANDLED_REDIRECT;
} else if (continuingDownload && statusCode == Downloads.STATUS_SUCCESS) {
finalStatus = Downloads.STATUS_PRECONDITION_FAILED;
} else {
finalStatus = Downloads.STATUS_UNHANDLED_HTTP_CODE;
}
request.abort();
break http_request_loop;
} else {
// Handles the response, saves the file
if (Constants.LOGV) {
Log.v(Constants.TAG, "received response for " + mInfo.uri);
}
if (!continuingDownload) {
Header header = response.getFirstHeader("Accept-Ranges");
if (header != null) {
headerAcceptRanges = header.getValue();
}
header = response.getFirstHeader("Content-Disposition");
if (header != null) {
headerContentDisposition = header.getValue();
}
header = response.getFirstHeader("Content-Location");
if (header != null) {
headerContentLocation = header.getValue();
}
if (mimeType == null) {
header = response.getFirstHeader("Content-Type");
if (header != null) {
mimeType = sanitizeMimeType(header.getValue());
}
}
header = response.getFirstHeader("ETag");
if (header != null) {
headerETag = header.getValue();
}
header = response.getFirstHeader("Transfer-Encoding");
if (header != null) {
headerTransferEncoding = header.getValue();
}
if (headerTransferEncoding == null) {
header = response.getFirstHeader("Content-Length");
if (header != null) {
headerContentLength = header.getValue();
}
} else {
// Ignore content-length with transfer-encoding - 2616 4.4 3
if (Constants.LOGVV) {
Log.v(Constants.TAG,
"ignoring content-length because of xfer-encoding");
}
}
if (Constants.LOGVV) {
Log.v(Constants.TAG, "Accept-Ranges: " + headerAcceptRanges);
Log.v(Constants.TAG, "Content-Disposition: " +
headerContentDisposition);
Log.v(Constants.TAG, "Content-Length: " + headerContentLength);
Log.v(Constants.TAG, "Content-Location: " + headerContentLocation);
Log.v(Constants.TAG, "Content-Type: " + mimeType);
Log.v(Constants.TAG, "ETag: " + headerETag);
Log.v(Constants.TAG, "Transfer-Encoding: " + headerTransferEncoding);
}
if (!mInfo.noIntegrity && headerContentLength == null &&
(headerTransferEncoding == null
|| !headerTransferEncoding.equalsIgnoreCase("chunked"))
) {
if (Config.LOGD) {
Log.d(Constants.TAG, "can't know size of download, giving up");
}
finalStatus = Downloads.STATUS_LENGTH_REQUIRED;
request.abort();
break http_request_loop;
}
DownloadFileInfo fileInfo = Helpers.generateSaveFile(
mContext,
mInfo.uri,
mInfo.hint,
headerContentDisposition,
headerContentLocation,
mimeType,
mInfo.destination,
(headerContentLength != null) ?
Integer.parseInt(headerContentLength) : 0);
if (fileInfo.filename == null) {
finalStatus = fileInfo.status;
request.abort();
break http_request_loop;
}
filename = fileInfo.filename;
stream = fileInfo.stream;
if (Constants.LOGV) {
Log.v(Constants.TAG, "writing " + mInfo.uri + " to " + filename);
}
ContentValues values = new ContentValues();
values.put(Downloads._DATA, filename);
if (headerETag != null) {
values.put(Constants.ETAG, headerETag);
}
if (mimeType != null) {
values.put(Downloads.MIMETYPE, mimeType);
}
int contentLength = -1;
if (headerContentLength != null) {
contentLength = Integer.parseInt(headerContentLength);
}
values.put(Downloads.TOTAL_BYTES, contentLength);
mContext.getContentResolver().update(contentUri, values, null, null);
}
InputStream entityStream;
try {
entityStream = response.getEntity().getContent();
} catch (IOException ex) {
if (!Helpers.isNetworkAvailable(mContext)) {
finalStatus = Downloads.STATUS_RUNNING_PAUSED;
} else if (mInfo.numFailed < Constants.MAX_RETRIES) {
finalStatus = Downloads.STATUS_RUNNING_PAUSED;
countRetry = true;
} else {
if (Constants.LOGV) {
Log.d(Constants.TAG, "IOException getting entity for " + mInfo.uri +
" : " + ex);
} else if (Config.LOGD) {
Log.d(Constants.TAG, "IOException getting entity for download " +
mInfo.id + " : " + ex);
}
finalStatus = Downloads.STATUS_HTTP_DATA_ERROR;
}
request.abort();
break http_request_loop;
}
for (;;) {
int bytesRead;
try {
bytesRead = entityStream.read(data);
} catch (IOException ex) {
ContentValues values = new ContentValues();
values.put(Downloads.CURRENT_BYTES, bytesSoFar);
mContext.getContentResolver().update(contentUri, values, null, null);
if (!mInfo.noIntegrity && headerETag == null) {
if (Constants.LOGV) {
Log.v(Constants.TAG, "download IOException for " + mInfo.uri +
" : " + ex);
} else if (Config.LOGD) {
Log.d(Constants.TAG, "download IOException for download " +
mInfo.id + " : " + ex);
}
if (Config.LOGD) {
Log.d(Constants.TAG,
"can't resume interrupted download with no ETag");
}
finalStatus = Downloads.STATUS_PRECONDITION_FAILED;
} else if (!Helpers.isNetworkAvailable(mContext)) {
finalStatus = Downloads.STATUS_RUNNING_PAUSED;
} else if (mInfo.numFailed < Constants.MAX_RETRIES) {
finalStatus = Downloads.STATUS_RUNNING_PAUSED;
countRetry = true;
} else {
if (Constants.LOGV) {
Log.v(Constants.TAG, "download IOException for " + mInfo.uri +
" : " + ex);
} else if (Config.LOGD) {
Log.d(Constants.TAG, "download IOException for download " +
mInfo.id + " : " + ex);
}
finalStatus = Downloads.STATUS_HTTP_DATA_ERROR;
}
request.abort();
break http_request_loop;
}
if (bytesRead == -1) { // success
ContentValues values = new ContentValues();
values.put(Downloads.CURRENT_BYTES, bytesSoFar);
if (headerContentLength == null) {
values.put(Downloads.TOTAL_BYTES, bytesSoFar);
}
mContext.getContentResolver().update(contentUri, values, null, null);
if ((headerContentLength != null)
&& (bytesSoFar
!= Integer.parseInt(headerContentLength))) {
if (!mInfo.noIntegrity && headerETag == null) {
if (Constants.LOGV) {
Log.d(Constants.TAG, "mismatched content length " +
mInfo.uri);
} else if (Config.LOGD) {
Log.d(Constants.TAG, "mismatched content length for " +
mInfo.id);
}
finalStatus = Downloads.STATUS_LENGTH_REQUIRED;
} else if (!Helpers.isNetworkAvailable(mContext)) {
finalStatus = Downloads.STATUS_RUNNING_PAUSED;
} else if (mInfo.numFailed < Constants.MAX_RETRIES) {
finalStatus = Downloads.STATUS_RUNNING_PAUSED;
countRetry = true;
} else {
if (Constants.LOGV) {
Log.v(Constants.TAG, "closed socket for " + mInfo.uri);
} else if (Config.LOGD) {
Log.d(Constants.TAG, "closed socket for download " +
mInfo.id);
}
finalStatus = Downloads.STATUS_HTTP_DATA_ERROR;
}
break http_request_loop;
}
break;
}
gotData = true;
for (;;) {
try {
if (stream == null) {
stream = new FileOutputStream(filename, true);
}
stream.write(data, 0, bytesRead);
if (mInfo.destination == Downloads.DESTINATION_EXTERNAL
&& !DrmRawContent.DRM_MIMETYPE_MESSAGE_STRING
.equalsIgnoreCase(mimeType)) {
try {
stream.close();
stream = null;
} catch (IOException ex) {
if (Constants.LOGV) {
Log.v(Constants.TAG,
"exception when closing the file " +
"during download : " + ex);
}
// nothing can really be done if the file can't be closed
}
}
break;
} catch (IOException ex) {
if (!Helpers.discardPurgeableFiles(
mContext, Constants.BUFFER_SIZE)) {
finalStatus = Downloads.STATUS_FILE_ERROR;
break http_request_loop;
}
}
}
bytesSoFar += bytesRead;
long now = System.currentTimeMillis();
if (bytesSoFar - bytesNotified > Constants.MIN_PROGRESS_STEP
&& now - timeLastNotification
> Constants.MIN_PROGRESS_TIME) {
ContentValues values = new ContentValues();
values.put(Downloads.CURRENT_BYTES, bytesSoFar);
mContext.getContentResolver().update(
contentUri, values, null, null);
bytesNotified = bytesSoFar;
timeLastNotification = now;
}
if (Constants.LOGVV) {
Log.v(Constants.TAG, "downloaded " + bytesSoFar + " for " + mInfo.uri);
}
synchronized(mInfo) {
if (mInfo.control == Downloads.CONTROL_PAUSED) {
if (Constants.LOGV) {
Log.v(Constants.TAG, "paused " + mInfo.uri);
}
finalStatus = Downloads.STATUS_RUNNING_PAUSED;
request.abort();
break http_request_loop;
}
}
if (mInfo.status == Downloads.STATUS_CANCELED) {
if (Constants.LOGV) {
Log.d(Constants.TAG, "canceled " + mInfo.uri);
} else if (Config.LOGD) {
// Log.d(Constants.TAG, "canceled id " + mInfo.id);
}
finalStatus = Downloads.STATUS_CANCELED;
break http_request_loop;
}
}
if (Constants.LOGV) {
Log.v(Constants.TAG, "download completed for " + mInfo.uri);
}
finalStatus = Downloads.STATUS_SUCCESS;
}
break;
}
} catch (FileNotFoundException ex) {
if (Config.LOGD) {
Log.d(Constants.TAG, "FileNotFoundException for " + filename + " : " + ex);
}
finalStatus = Downloads.STATUS_FILE_ERROR;
// falls through to the code that reports an error
} catch (Exception ex) { //sometimes the socket code throws unchecked exceptions
if (Constants.LOGV) {
Log.d(Constants.TAG, "Exception for " + mInfo.uri, ex);
} else if (Config.LOGD) {
Log.d(Constants.TAG, "Exception for id " + mInfo.id, ex);
}
finalStatus = Downloads.STATUS_UNKNOWN_ERROR;
// falls through to the code that reports an error
} finally {
mInfo.hasActiveThread = false;
if (wakeLock != null) {
wakeLock.release();
wakeLock = null;
}
if (client != null) {
client.close();
client = null;
}
try {
// close the file
if (stream != null) {
stream.close();
}
} catch (IOException ex) {
if (Constants.LOGV) {
Log.v(Constants.TAG, "exception when closing the file after download : " + ex);
}
// nothing can really be done if the file can't be closed
}
if (filename != null) {
// if the download wasn't successful, delete the file
if (Downloads.isStatusError(finalStatus)) {
new File(filename).delete();
filename = null;
} else if (Downloads.isStatusSuccess(finalStatus) &&
DrmRawContent.DRM_MIMETYPE_MESSAGE_STRING
.equalsIgnoreCase(mimeType)) {
// transfer the file to the DRM content provider
File file = new File(filename);
Intent item = DrmStore.addDrmFile(mContext.getContentResolver(), file, null);
if (item == null) {
Log.w(Constants.TAG, "unable to add file " + filename + " to DrmProvider");
finalStatus = Downloads.STATUS_UNKNOWN_ERROR;
} else {
filename = item.getDataString();
mimeType = item.getType();
}
file.delete();
} else if (Downloads.isStatusSuccess(finalStatus)) {
// make sure the file is readable
FileUtils.setPermissions(filename, 0644, -1, -1);
}
}
notifyDownloadCompleted(finalStatus, countRetry, retryAfter, redirectCount,
gotData, filename, newUri, mimeType);
}
| | private java.lang.String | sanitizeMimeType(java.lang.String mimeType)Clean up a mimeType string so it can be used to dispatch an intent to
view a downloaded asset.
try {
mimeType = mimeType.trim().toLowerCase(Locale.ENGLISH);
final int semicolonIndex = mimeType.indexOf(';");
if (semicolonIndex != -1) {
mimeType = mimeType.substring(0, semicolonIndex);
}
return mimeType;
} catch (NullPointerException npe) {
return null;
}
| | private java.lang.String | userAgent()Returns the user agent provided by the initiating app, or use the default one
String userAgent = mInfo.userAgent;
if (userAgent != null) {
}
if (userAgent == null) {
userAgent = Constants.DEFAULT_USER_AGENT;
}
return userAgent;
|
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