private static void play(String videoId, int format, String encoding,
String userAgent, File outputdir, String extension)
throws Throwable {
log.fine("Retrieving " + videoId);
List<NameValuePair> qparams = new ArrayList<NameValuePair>();
qparams.add(new BasicNameValuePair("video_id", videoId));
qparams.add(new BasicNameValuePair("fmt", "" + format));
URI uri = getUri("get_video_info", qparams);
System.out.println("************JavaYoutubeDownloade.play() Uri = "
+ uri.toString());
System.out.println("JavaYoutubeDownloade.play() User Agent = "
+ userAgent);
CookieStore cookieStore = new BasicCookieStore();
HttpContext localContext = new BasicHttpContext();
localContext.setAttribute(ClientContext.COOKIE_STORE, cookieStore);
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(uri);
if (userAgent != null && userAgent.length() > 0) {
httpget.setHeader("User-Agent", userAgent);
}
log.finer("Executing " + uri);
HttpResponse response = httpclient.execute(httpget, localContext);
HttpEntity entity = response.getEntity();
if (entity != null && response.getStatusLine().getStatusCode() == 200) {
InputStream instream = entity.getContent();
String videoInfo = getStringFromInputStream(encoding, instream);
if (videoInfo != null && videoInfo.length() > 0) {
List<NameValuePair> infoMap = new ArrayList<NameValuePair>();
URLEncodedUtils
.parse(infoMap, new Scanner(videoInfo), encoding);
String downloadUrl = null;
filename = videoId;
for (NameValuePair pair : infoMap) {
String key = pair.getName();
String val = pair.getValue();
log.finest(key + "=" + val);
if (key.equals("title")) {
filename = val;
} else if (key.equals("fmt_url_map")) {
String[] formats = commaPattern.split(val);
boolean found = false;
for (String fmt : formats) {
String[] fmtPieces = pipePattern.split(fmt);
if (fmtPieces.length == 2) {
int pieceFormat = Integer
.parseInt(fmtPieces[0]);
log.fine("Available format=" + pieceFormat);
if (pieceFormat == format) {
// found what we want
downloadUrl = fmtPieces[1];
found = true;
break;
}
}
}
if (!found) {
log.warning("Could not find video matching specified format, however some formats of the video do exist (use -verbose).");
}
}
}
filename = cleanFilename(filename);
if (filename.length() == 0) {
filename = videoId;
} else {
filename += "_" + videoId;
}
filename += "." + extension;
File outputfile = new File(outputdir, filename);
if (!outputfile.exists()) {
outputfile.createNewFile();
}
//downloadedFile = outputdir.getPath() + "/" + filename;
if (downloadUrl != null) {
downloadWithHttpClient(userAgent, downloadUrl, outputfile);
} else {
log.severe("Could not find video");
}
} else {
log.severe("Did not receive content from youtube");
}
} else {
log.severe("Could not contact youtube: " + response.getStatusLine());
}
}
private static void downloadWithHttpClient(String userAgent,
String downloadUrl, File outputfile) throws Throwable {
HttpGet httpget2 = new HttpGet(downloadUrl);
if (userAgent != null && userAgent.length() > 0) {
httpget2.setHeader("User-Agent", userAgent);
}
log.finer("Executing " + httpget2.getURI());
HttpClient httpclient2 = new DefaultHttpClient();
HttpResponse response2 = httpclient2.execute(httpget2);
HttpEntity entity2 = response2.getEntity();
if (entity2 != null && response2.getStatusLine().getStatusCode() == 200) {
double length = entity2.getContentLength();
if (length <= 0) {
// Unexpected, but do not divide by zero
length = 1;
}
InputStream instream2 = entity2.getContent();
System.out.println("Writing "
+ commaFormatNoPrecision.format(length) + " bytes to "
+ outputfile);
if (outputfile.exists()) {
outputfile.delete();
}
FileOutputStream outstream = new FileOutputStream(outputfile);
try {
byte[] buffer = new byte[BUFFER_SIZE];
double total = 0;
int count = -1;
int progress = 10;
long start = System.currentTimeMillis();
while ((count = instream2.read(buffer)) != -1) {
total += count;
int p = (int) ((total / length) * ONE_HUNDRED);
if (p >= progress) {
long now = System.currentTimeMillis();
double s = (now - start) / 1000;
int kbpers = (int) ((total / KB) / s);
System.out.println(progress + "% (" + kbpers + "KB/s)");
progress += 10;
}
outstream.write(buffer, 0, count);
}
outstream.flush();
} finally {
outstream.close();
}
System.out.println("Done");
}
}
起初，我提供的下载 URL 不正确。现在，它正在工作......