@Override
public long download(boolean resume, DownloadCompleteCallback callback) {
switch (status) {
case ABORTED:
case UNRECOVERABLE_ERROR:
case DOWNLOAD_FINISHED:
return 0;
default:
}
int bytes = 0;
File file = new File(toFile);
try {
long localFileSize = 0;
if (file.exists() && resume) {
localFileSize = file.length();
s_logger.info("Resuming download to file (current size)=" + localFileSize);
}
Date start = new Date();
int responseCode = 0;
if (localFileSize > 0) {
// require partial content support for resume
request.addRequestHeader("Range", "bytes=" + localFileSize + "-");
if (client.executeMethod(request) != HttpStatus.SC_PARTIAL_CONTENT) {
errorString = "HTTP Server does not support partial get";
status = TemplateDownloader.Status.UNRECOVERABLE_ERROR;
return 0;
}
} else if ((responseCode = client.executeMethod(request)) != HttpStatus.SC_OK) {
status = TemplateDownloader.Status.UNRECOVERABLE_ERROR;
errorString = " HTTP Server returned " + responseCode + " (expected 200 OK) ";
return 0; // FIXME: retry?
}
Header contentLengthHeader = request.getResponseHeader("Content-Length");
boolean chunked = false;
long remoteSize2 = 0;
if (contentLengthHeader == null) {
Header chunkedHeader = request.getResponseHeader("Transfer-Encoding");
if (chunkedHeader == null || !"chunked".equalsIgnoreCase(chunkedHeader.getValue())) {
status = TemplateDownloader.Status.UNRECOVERABLE_ERROR;
errorString = " Failed to receive length of download ";
return 0; // FIXME: what status do we put here? Do we retry?
} else if ("chunked".equalsIgnoreCase(chunkedHeader.getValue())) {
chunked = true;
}
} else {
remoteSize2 = Long.parseLong(contentLengthHeader.getValue());
}
if (remoteSize == 0) {
remoteSize = remoteSize2;
}
if (remoteSize > MAX_TEMPLATE_SIZE_IN_BYTES) {
s_logger.info(
"Remote size is too large: " + remoteSize + " , max=" + MAX_TEMPLATE_SIZE_IN_BYTES);
status = Status.UNRECOVERABLE_ERROR;
errorString = "Download file size is too large";
return 0;
}
if (remoteSize == 0) {
remoteSize = MAX_TEMPLATE_SIZE_IN_BYTES;
}
InputStream in =
!chunked
? new BufferedInputStream(request.getResponseBodyAsStream())
: new ChunkedInputStream(request.getResponseBodyAsStream());
RandomAccessFile out = new RandomAccessFile(file, "rwd");
out.seek(localFileSize);
s_logger.info(
"Starting download from "
+ getDownloadUrl()
+ " to "
+ toFile
+ " remoteSize="
+ remoteSize
+ " , max size="
+ MAX_TEMPLATE_SIZE_IN_BYTES);
byte[] block = new byte[CHUNK_SIZE];
long offset = 0;
boolean done = false;
status = TemplateDownloader.Status.IN_PROGRESS;
while (!done && status != Status.ABORTED && offset <= remoteSize) {
if ((bytes = in.read(block, 0, CHUNK_SIZE)) > -1) {
out.write(block, 0, bytes);
offset += bytes;
out.seek(offset);
totalBytes += bytes;
} else {
done = true;
}
}
Date finish = new Date();
String downloaded = "(incomplete download)";
if (totalBytes >= remoteSize) {
status = TemplateDownloader.Status.DOWNLOAD_FINISHED;
downloaded = "(download complete remote=" + remoteSize + "bytes)";
}
errorString = "Downloaded " + totalBytes + " bytes " + downloaded;
downloadTime += finish.getTime() - start.getTime();
out.close();
return totalBytes;
} catch (HttpException hte) {
status = TemplateDownloader.Status.UNRECOVERABLE_ERROR;
errorString = hte.getMessage();
} catch (IOException ioe) {
status = TemplateDownloader.Status.UNRECOVERABLE_ERROR; // probably a file write error?
errorString = ioe.getMessage();
} finally {
if (status == Status.UNRECOVERABLE_ERROR && file.exists() && !file.isDirectory()) {
file.delete();
}
request.releaseConnection();
if (callback != null) {
callback.downloadComplete(status);
}
}
return 0;
}
@Override
public long download(boolean resume, DownloadCompleteCallback callback) {
if (_status == Status.ABORTED
|| _status == Status.UNRECOVERABLE_ERROR
|| _status == Status.DOWNLOAD_FINISHED) {
return 0;
}
_start = System.currentTimeMillis();
_resume = resume;
File src;
try {
src = new File(new URI(_downloadUrl));
} catch (URISyntaxException e1) {
s_logger.warn("Invalid URI " + _downloadUrl);
_status = Status.UNRECOVERABLE_ERROR;
return 0;
}
File dst = new File(_toFile);
FileChannel fic = null;
FileChannel foc = null;
FileInputStream fis = null;
FileOutputStream fos = null;
try {
if (_storage != null) {
dst.createNewFile();
_storage.setWorldReadableAndWriteable(dst);
}
ByteBuffer buffer = ByteBuffer.allocate(1024 * 512);
try {
fis = new FileInputStream(src);
} catch (FileNotFoundException e) {
s_logger.warn("Unable to find " + _downloadUrl);
_errorString = "Unable to find " + _downloadUrl;
return -1;
}
fic = fis.getChannel();
try {
fos = new FileOutputStream(dst);
} catch (FileNotFoundException e) {
s_logger.warn("Unable to find " + _toFile);
return -1;
}
foc = fos.getChannel();
_remoteSize = src.length();
_totalBytes = 0;
_status = TemplateDownloader.Status.IN_PROGRESS;
try {
while (_status != Status.ABORTED && fic.read(buffer) != -1) {
buffer.flip();
int count = foc.write(buffer);
_totalBytes += count;
buffer.clear();
}
} catch (IOException e) {
s_logger.warn("Unable to download", e);
}
String downloaded = "(incomplete download)";
if (_totalBytes == _remoteSize) {
_status = TemplateDownloader.Status.DOWNLOAD_FINISHED;
downloaded = "(download complete)";
}
_errorString = "Downloaded " + _remoteSize + " bytes " + downloaded;
_downloadTime += System.currentTimeMillis() - _start;
return _totalBytes;
} catch (Exception e) {
_status = TemplateDownloader.Status.UNRECOVERABLE_ERROR;
_errorString = e.getMessage();
return 0;
} finally {
if (fic != null) {
try {
fic.close();
} catch (IOException e) {
s_logger.info("[ignore] error while closing file input channel.");
}
}
if (foc != null) {
try {
foc.close();
} catch (IOException e) {
s_logger.info("[ignore] error while closing file output channel.");
}
}
if (fis != null) {
try {
fis.close();
} catch (IOException e) {
s_logger.info("[ignore] error while closing file input stream.");
}
}
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
s_logger.info("[ignore] error while closing file output stream.");
}
}
if (_status == Status.UNRECOVERABLE_ERROR && dst.exists()) {
dst.delete();
}
if (callback != null) {
callback.downloadComplete(_status);
}
}
}
