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NewPipeExtractor
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[SoundCloud] Fix extractors built from next playlist pages 

They didn't have the information to calculate another next page url. So now `nextPageUrl` contains a full link with all video ids, and `getPage` takes the first part of the url (containing 15 streams) and produces another `nextPageUrl` with the remaining streams.
Also add a test for this.
This commit is contained in:
Stypox 2020-03-17 18:04:40 +01:00
parent 0e1b4bbf17
commit 5e4ddb368f
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GPG Key ID: 4BDF1B40A49FDD23
2 changed files with 39 additions and 32 deletions
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62
extractor/src/main/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudPlaylistExtractor.java
View File

@ -30,8 +30,6 @@ public class SoundcloudPlaylistExtractor extends PlaylistExtractor {
private JsonObject playlist;
private StreamInfoItemsCollector streamInfoItemsCollector;
private List<Integer> nextTrackIds;
private int nextTrackIdsIndex;
private String nextPageUrl;
public SoundcloudPlaylistExtractor(StreamingService service, ListLinkHandler linkHandler) {
@ -121,15 +119,16 @@ public class SoundcloudPlaylistExtractor extends PlaylistExtractor {
@Override
public InfoItemsPage<StreamInfoItem> getInitialPage() throws IOException, ExtractionException {
if (streamInfoItemsCollector == null) {
computeInitialTracksAndNextIds();
computeInitialTracksAndNextPageUrl();
}
return new InfoItemsPage<>(streamInfoItemsCollector, getNextPageUrl());
return new InfoItemsPage<>(streamInfoItemsCollector, nextPageUrl);
}
private void computeInitialTracksAndNextIds() {
private void computeInitialTracksAndNextPageUrl() throws IOException, ExtractionException {
streamInfoItemsCollector = new StreamInfoItemsCollector(getServiceId());
nextTrackIds = new ArrayList<>();
nextTrackIdsIndex = 0;
StringBuilder nextPageUrlBuilder = new StringBuilder("https://api-v2.soundcloud.com/tracks?client_id=");
nextPageUrlBuilder.append(SoundcloudParsingHelper.clientId());
nextPageUrlBuilder.append("&ids=");
JsonArray tracks = playlist.getArray("tracks");
for (Object o : tracks) {
@ -138,39 +137,23 @@ public class SoundcloudPlaylistExtractor extends PlaylistExtractor {
if (track.has("title")) { // i.e. if full info is available
streamInfoItemsCollector.commit(new SoundcloudStreamInfoItemExtractor(track));
} else {
nextTrackIds.add(track.getInt("id"));
}
// %09d would be enough, but a 0 before the number does not create problems, so let's be sure
nextPageUrlBuilder.append(String.format("%010d,", track.getInt("id")));
}
}
}
private void computeAnotherNextPageUrl() throws IOException, ExtractionException {
if (nextTrackIds == null || nextTrackIdsIndex >= nextTrackIds.size()) {
nextPageUrl = ""; // there are no more tracks
return;
nextPageUrl = nextPageUrlBuilder.toString();
if (nextPageUrl.endsWith("&ids=")) {
// there are no other videos
nextPageUrl = "";
}
StringBuilder urlBuilder = new StringBuilder("https://api-v2.soundcloud.com/tracks?client_id=");
urlBuilder.append(SoundcloudParsingHelper.clientId());
urlBuilder.append("&ids=");
int upperIndex = Math.min(nextTrackIdsIndex + streamsPerRequestedPage, nextTrackIds.size());
for (int i = nextTrackIdsIndex; i < upperIndex; ++i) {
urlBuilder.append(nextTrackIds.get(i));
urlBuilder.append(","); // a , at the end is ok
}
nextTrackIdsIndex = upperIndex;
nextPageUrl = urlBuilder.toString();
}
@Override
public String getNextPageUrl() throws IOException, ExtractionException {
if (nextPageUrl == null) {
if (nextTrackIds == null) {
computeInitialTracksAndNextIds();
}
computeAnotherNextPageUrl();
computeInitialTracksAndNextPageUrl();
}
return nextPageUrl;
}
@ -181,8 +164,24 @@ public class SoundcloudPlaylistExtractor extends PlaylistExtractor {
throw new ExtractionException(new IllegalArgumentException("Page url is empty or null"));
}
// see computeInitialTracksAndNextPageUrl
final int lengthFirstPartOfUrl = ("https://api-v2.soundcloud.com/tracks?client_id="
+ SoundcloudParsingHelper.clientId()
+ "&ids=").length();
final int lengthOfEveryStream = 11;
String currentPageUrl;
int lengthMaxStreams = lengthFirstPartOfUrl + lengthOfEveryStream * streamsPerRequestedPage;
if (pageUrl.length() <= lengthMaxStreams) {
currentPageUrl = pageUrl; // fetch every remaining video, there are less than the max
nextPageUrl = ""; // afterwards the list is complete
} else {
currentPageUrl = pageUrl.substring(0, lengthMaxStreams);
nextPageUrl = pageUrl.substring(0, lengthFirstPartOfUrl) + pageUrl.substring(lengthMaxStreams);
}
StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
String response = NewPipe.getDownloader().get(pageUrl, getExtractorLocalization()).responseBody();
String response = NewPipe.getDownloader().get(currentPageUrl, getExtractorLocalization()).responseBody();
try {
JsonArray tracks = JsonParser.array().from(response);
@ -195,7 +194,6 @@ public class SoundcloudPlaylistExtractor extends PlaylistExtractor {
throw new ParsingException("Could not parse json response", e);
}
computeAnotherNextPageUrl();
return new InfoItemsPage<>(collector, nextPageUrl);
}
}

9
extractor/src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudPlaylistExtractorTest.java
View File

@ -234,6 +234,15 @@ public class SoundcloudPlaylistExtractorTest {
public void testGetPageInNewExtractor() throws Exception {
final PlaylistExtractor newExtractor = SoundCloud.getPlaylistExtractor(extractor.getUrl());
defaultTestGetPageInNewExtractor(extractor, newExtractor);
String page1 = newExtractor.getNextPageUrl();
defaultTestMoreItems(newExtractor); // there has to be another page
String page2 = newExtractor.getNextPageUrl();
defaultTestMoreItems(newExtractor); // and another one
String page3 = newExtractor.getNextPageUrl();
assertNotEquals("Same pages", page1, page2);
assertNotEquals("Same pages", page2, page3);
assertNotEquals("Same pages", page3, page1);
}
/*//////////////////////////////////////////////////////////////////////////