Unverified Commit 501ec301 authored by Stypox's avatar Stypox
Browse files

Implement youtube subscription import from Google takeout

parent 2f02c0e6
package org.schabi.newpipe.extractor.services.youtube.extractors;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import com.grack.nanojson.JsonArray;
import com.grack.nanojson.JsonObject;
import com.grack.nanojson.JsonParser;
import com.grack.nanojson.JsonParserException;
import org.schabi.newpipe.extractor.exceptions.ExtractionException;
import org.schabi.newpipe.extractor.services.youtube.YoutubeService;
import org.schabi.newpipe.extractor.subscription.SubscriptionExtractor;
import org.schabi.newpipe.extractor.subscription.SubscriptionItem;
import org.schabi.newpipe.extractor.utils.Parser;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.annotation.Nonnull;
import static org.schabi.newpipe.extractor.subscription.SubscriptionExtractor.ContentSource.INPUT_STREAM;
/**
* Extract subscriptions from a YouTube export (OPML format supported)
* Extract subscriptions from a Google takout export (the user has to get the JSON out of the zip)
*/
public class YoutubeSubscriptionExtractor extends SubscriptionExtractor {
private static final String BASE_CHANNEL_URL = "https://www.youtube.com/channel/";
public YoutubeSubscriptionExtractor(YoutubeService service) {
super(service, Collections.singletonList(INPUT_STREAM));
public YoutubeSubscriptionExtractor(final YoutubeService youtubeService) {
super(youtubeService, Collections.singletonList(INPUT_STREAM));
}
@Override
public String getRelatedUrl() {
return "https://www.youtube.com/subscription_manager?action_takeout=1";
return "https://takeout.google.com/takeout/custom/youtube";
}
@Override
public List<SubscriptionItem> fromInputStream(InputStream contentInputStream) throws ExtractionException {
if (contentInputStream == null) throw new InvalidSourceException("input stream is null");
return getItemsFromOPML(contentInputStream);
}
/*//////////////////////////////////////////////////////////////////////////
// OPML implementation
//////////////////////////////////////////////////////////////////////////*/
private static final String ID_PATTERN = "/videos.xml\\?channel_id=([A-Za-z0-9_-]*)";
private static final String BASE_CHANNEL_URL = "https://www.youtube.com/channel/";
private List<SubscriptionItem> getItemsFromOPML(InputStream contentInputStream) throws ExtractionException {
final List<SubscriptionItem> result = new ArrayList<>();
final String contentString = readFromInputStream(contentInputStream);
Document document = Jsoup.parse(contentString, "", org.jsoup.parser.Parser.xmlParser());
if (document.select("opml").isEmpty()) {
throw new InvalidSourceException("document does not have OPML tag");
}
if (document.select("outline").isEmpty()) {
throw new InvalidSourceException("document does not have at least one outline tag");
}
for (Element outline : document.select("outline[type=rss]")) {
String title = outline.attr("title");
String xmlUrl = outline.attr("abs:xmlUrl");
try {
String id = Parser.matchGroup1(ID_PATTERN, xmlUrl);
result.add(new SubscriptionItem(service.getServiceId(), BASE_CHANNEL_URL + id, title));
} catch (Parser.RegexException ignored) { /* ignore invalid subscriptions */ }
}
return result;
}
/*//////////////////////////////////////////////////////////////////////////
// Utils
//////////////////////////////////////////////////////////////////////////*/
/**
* Throws an exception if the string does not have the right tag/string from a valid export.
*/
private void throwIfTagIsNotFound(String content) throws InvalidSourceException {
if (!content.trim().contains("<opml")) {
throw new InvalidSourceException("input stream does not have OPML tag");
}
}
private String readFromInputStream(InputStream inputStream) throws InvalidSourceException {
StringBuilder contentBuilder = new StringBuilder();
boolean hasTag = false;
public List<SubscriptionItem> fromInputStream(@Nonnull final InputStream contentInputStream)
throws ExtractionException {
final JsonArray subscriptions;
try {
byte[] buffer = new byte[16 * 1024];
int read;
while ((read = inputStream.read(buffer)) != -1) {
String currentPartOfContent = new String(buffer, 0, read, "UTF-8");
contentBuilder.append(currentPartOfContent);
subscriptions = JsonParser.array().from(contentInputStream);
} catch (JsonParserException e) {
throw new InvalidSourceException("Invalid json input stream", e);
}
// Fail-fast in case of reading a long unsupported input stream
if (!hasTag && contentBuilder.length() > 128) {
throwIfTagIsNotFound(contentBuilder.toString());
hasTag = true;
}
boolean foundInvalidSubscription = false;
final List<SubscriptionItem> subscriptionItems = new ArrayList<>();
for (final Object subscriptionObject : subscriptions) {
if (!(subscriptionObject instanceof JsonObject)) {
foundInvalidSubscription = true;
continue;
}
} catch (InvalidSourceException e) {
throw e;
} catch (Throwable e) {
throw new InvalidSourceException(e);
} finally {
try {
inputStream.close();
} catch (IOException ignored) {
final JsonObject subscription = ((JsonObject) subscriptionObject).getObject("snippet");
final String id = subscription.getObject("resourceId").getString("channelId", "");
if (id.length() != 24) { // e.g. UCsXVk37bltHxD1rDPwtNM8Q
foundInvalidSubscription = true;
continue;
}
}
final String fileContent = contentBuilder.toString().trim();
if (fileContent.isEmpty()) {
throw new InvalidSourceException("Empty input stream");
subscriptionItems.add(new SubscriptionItem(service.getServiceId(),
BASE_CHANNEL_URL + id, subscription.getString("title", "")));
}
if (!hasTag) {
throwIfTagIsNotFound(fileContent);
if (foundInvalidSubscription && subscriptionItems.isEmpty()) {
throw new InvalidSourceException("Found only invalid channel ids");
}
return fileContent;
return subscriptionItems;
}
}
......@@ -4,6 +4,7 @@ import org.schabi.newpipe.extractor.StreamingService;
import org.schabi.newpipe.extractor.exceptions.ExtractionException;
import org.schabi.newpipe.extractor.exceptions.ParsingException;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.io.IOException;
import java.io.InputStream;
......@@ -71,8 +72,9 @@ public abstract class SubscriptionExtractor {
*
* @throws InvalidSourceException when the content read from the InputStream is invalid and can not be parsed
*/
@SuppressWarnings("RedundantThrows")
public List<SubscriptionItem> fromInputStream(InputStream contentInputStream) throws IOException, ExtractionException {
throw new UnsupportedOperationException("Service " + service.getServiceInfo().getName() + " doesn't support extracting from an InputStream");
public List<SubscriptionItem> fromInputStream(@Nonnull final InputStream contentInputStream)
throws ExtractionException {
throw new UnsupportedOperationException("Service " + service.getServiceInfo().getName()
+ " doesn't support extracting from an InputStream");
}
}
......@@ -61,6 +61,21 @@ public class FileUtils {
writer.close();
}
/**
* Resolves the test resource file based on its filename. Looks in
* {@code extractor/src/test/resources/} and {@code src/test/resources/}
* @param filename the resource filename
* @return the resource file
*/
public static File resolveTestResource(final String filename) {
final File file = new File("extractor/src/test/resources/" + filename);
if (file.exists()) {
return file;
} else {
return new File("src/test/resources/" + filename);
}
}
/**
* Convert a JSON object to String
* toString() does not produce a valid JSON string
......
......@@ -11,12 +11,16 @@ import org.schabi.newpipe.extractor.subscription.SubscriptionExtractor;
import org.schabi.newpipe.extractor.subscription.SubscriptionItem;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.List;
import static org.junit.Assert.*;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.schabi.newpipe.FileUtils.resolveTestResource;
/**
* Test for {@link YoutubeSubscriptionExtractor}
......@@ -34,54 +38,48 @@ public class YoutubeSubscriptionExtractorTest {
@Test
public void testFromInputStream() throws Exception {
File testFile = new File("extractor/src/test/resources/youtube_export_test.xml");
if (!testFile.exists()) testFile = new File("src/test/resources/youtube_export_test.xml");
final List<SubscriptionItem> subscriptionItems = subscriptionExtractor.fromInputStream(
new FileInputStream(resolveTestResource("youtube_takeout_import_test.json")));
assertEquals(7, subscriptionItems.size());
List<SubscriptionItem> subscriptionItems = subscriptionExtractor.fromInputStream(new FileInputStream(testFile));
assertTrue("List doesn't have exactly 8 items (had " + subscriptionItems.size() + ")", subscriptionItems.size() == 8);
for (SubscriptionItem item : subscriptionItems) {
for (final SubscriptionItem item : subscriptionItems) {
assertNotNull(item.getName());
assertNotNull(item.getUrl());
assertTrue(urlHandler.acceptUrl(item.getUrl()));
assertFalse(item.getServiceId() == -1);
assertEquals(ServiceList.YouTube.getServiceId(), item.getServiceId());
}
}
@Test
public void testEmptySourceException() throws Exception {
String emptySource = "<opml version=\"1.1\"><body>" +
"<outline text=\"Testing\" title=\"123\" />" +
"</body></opml>";
List<SubscriptionItem> items = subscriptionExtractor.fromInputStream(new ByteArrayInputStream(emptySource.getBytes("UTF-8")));
final List<SubscriptionItem> items = subscriptionExtractor.fromInputStream(
new ByteArrayInputStream("[]".getBytes(StandardCharsets.UTF_8)));
assertTrue(items.isEmpty());
}
@Test
public void testSubscriptionWithEmptyTitleInSource() throws Exception {
String channelId = "AA0AaAa0AaaaAAAAAA0aa0AA";
String source = "<opml version=\"1.1\"><body><outline text=\"YouTube Subscriptions\" title=\"YouTube Subscriptions\">" +
"<outline text=\"\" title=\"\" type=\"rss\" xmlUrl=\"https://www.youtube.com/feeds/videos.xml?channel_id=" + channelId + "\" />" +
"</outline></body></opml>";
List<SubscriptionItem> items = subscriptionExtractor.fromInputStream(new ByteArrayInputStream(source.getBytes("UTF-8")));
assertTrue("List doesn't have exactly 1 item (had " + items.size() + ")", items.size() == 1);
assertTrue("Item does not have an empty title (had \"" + items.get(0).getName() + "\")", items.get(0).getName().isEmpty());
assertTrue("Item does not have the right channel id \"" + channelId + "\" (the whole url is \"" + items.get(0).getUrl() + "\")", items.get(0).getUrl().endsWith(channelId));
final String source = "[{\"snippet\":{\"resourceId\":{\"channelId\":\"UCEOXxzW2vU0P-0THehuIIeg\"}}}]";
final List<SubscriptionItem> items = subscriptionExtractor.fromInputStream(
new ByteArrayInputStream(source.getBytes(StandardCharsets.UTF_8)));
assertEquals(1, items.size());
assertEquals(ServiceList.YouTube.getServiceId(), items.get(0).getServiceId());
assertEquals("https://www.youtube.com/channel/UCEOXxzW2vU0P-0THehuIIeg", items.get(0).getUrl());
assertEquals("", items.get(0).getName());
}
@Test
public void testSubscriptionWithInvalidUrlInSource() throws Exception {
String source = "<opml version=\"1.1\"><body><outline text=\"YouTube Subscriptions\" title=\"YouTube Subscriptions\">" +
"<outline text=\"invalid\" title=\"url\" type=\"rss\" xmlUrl=\"https://www.youtube.com/feeds/videos.xml?channel_not_id=|||||||\"/>" +
"<outline text=\"fail\" title=\"fail\" type=\"rss\" xmlUgrl=\"invalidTag\"/>" +
"<outline text=\"invalid\" title=\"url\" type=\"rss\" xmlUrl=\"\"/>" +
"<outline text=\"\" title=\"\" type=\"rss\" xmlUrl=\"\"/>" +
"</outline></body></opml>";
List<SubscriptionItem> items = subscriptionExtractor.fromInputStream(new ByteArrayInputStream(source.getBytes("UTF-8")));
assertTrue(items.isEmpty());
final String source = "[{\"snippet\":{\"resourceId\":{\"channelId\":\"gibberish\"},\"title\":\"name1\"}}," +
"{\"snippet\":{\"resourceId\":{\"channelId\":\"UCEOXxzW2vU0P-0THehuIIeg\"},\"title\":\"name2\"}}]";
final List<SubscriptionItem> items = subscriptionExtractor.fromInputStream(
new ByteArrayInputStream(source.getBytes(StandardCharsets.UTF_8)));
assertEquals(1, items.size());
assertEquals(ServiceList.YouTube.getServiceId(), items.get(0).getServiceId());
assertEquals("https://www.youtube.com/channel/UCEOXxzW2vU0P-0THehuIIeg", items.get(0).getUrl());
assertEquals("name2", items.get(0).getName());
}
@Test
......@@ -89,26 +87,26 @@ public class YoutubeSubscriptionExtractorTest {
List<String> invalidList = Arrays.asList(
"<xml><notvalid></notvalid></xml>",
"<opml><notvalid></notvalid></opml>",
"<opml><body></body></opml>",
"{\"a\":\"b\"}",
"[{}]",
"[\"\", 5]",
"[{\"snippet\":{\"title\":\"name\"}}]",
"[{\"snippet\":{\"resourceId\":{\"channelId\":\"gibberish\"}}}]",
"",
null,
"\uD83D\uDC28\uD83D\uDC28\uD83D\uDC28",
"gibberish");
for (String invalidContent : invalidList) {
try {
if (invalidContent != null) {
byte[] bytes = invalidContent.getBytes("UTF-8");
subscriptionExtractor.fromInputStream(new ByteArrayInputStream(bytes));
fail("Extracting from \"" + invalidContent + "\" didn't throw an exception");
} else {
subscriptionExtractor.fromInputStream(null);
fail("Extracting from null String didn't throw an exception");
byte[] bytes = invalidContent.getBytes(StandardCharsets.UTF_8);
subscriptionExtractor.fromInputStream(new ByteArrayInputStream(bytes));
fail("Extracting from \"" + invalidContent + "\" didn't throw an exception");
} catch (final Exception e) {
boolean correctType = e instanceof SubscriptionExtractor.InvalidSourceException;
if (!correctType) {
e.printStackTrace();
}
} catch (Exception e) {
// System.out.println(" -> " + e);
boolean isExpectedException = e instanceof SubscriptionExtractor.InvalidSourceException;
assertTrue("\"" + e.getClass().getSimpleName() + "\" is not the expected exception", isExpectedException);
assertTrue(e.getClass().getSimpleName() + " is not InvalidSourceException", correctType);
}
}
}
......
<opml version="1.1">
<body>
<outline text="YouTube Subscriptions" title="YouTube Subscriptions">
<outline text="Kurzgesagt – In a Nutshell" title="Kurzgesagt – In a Nutshell" type="rss"
xmlUrl="https://www.youtube.com/feeds/videos.xml?channel_id=UCsXVk37bltHxD1rDPwtNM8Q"/>
<outline text="CaptainDisillusion" title="CaptainDisillusion" type="rss"
xmlUrl="https://www.youtube.com/feeds/videos.xml?channel_id=UCEOXxzW2vU0P-0THehuIIeg"/>
<outline text="TED" title="TED" type="rss"
xmlUrl="https://www.youtube.com/feeds/videos.xml?channel_id=UCAuUUnT6oDeKwE6v1NGQxug"/>
<outline text="Gorillaz" title="Gorillaz" type="rss"
xmlUrl="https://www.youtube.com/feeds/videos.xml?channel_id=UCfIXdjDQH9Fau7y99_Orpjw"/>
<outline text="ElectroBOOM" title="ElectroBOOM" type="rss"
xmlUrl="https://www.youtube.com/feeds/videos.xml?channel_id=UCJ0-OtVpF0wOKEqT2Z1HEtA"/>
<outline text="ⓤⓝⓘⓒⓞⓓⓔ" title="ⓤⓝⓘⓒⓞⓓⓔ" type="rss"
xmlUrl="https://www.youtube.com/feeds/videos.xml?channel_id=UCsXVk37bltHxD1rDPwtNM8Q"/>
<outline text="中文" title="中文" type="rss"
xmlUrl="https://www.youtube.com/feeds/videos.xml?channel_id=UCsXVk37bltHxD1rDPwtNM8Q"/>
<outline text="हिंदी" title="हिंदी" type="rss"
xmlUrl="https://www.youtube.com/feeds/videos.xml?channel_id=UCsXVk37bltHxD1rDPwtNM8Q"/>
</outline>
</body>
</opml>
\ No newline at end of file
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"id" : "qUAzBV8xkoLYOP-1gwzy6yVWWYc7mBJxLNUEVlkNk8Y",
"kind" : "youtube#subscription",
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"channelId" : "UC-lHJZR3Gqxm24_Vd_AJ5Yw",
"description" : "The official YouTube home of Gorillaz.",
"publishedAt" : "2020-11-01T17:24:34.498Z",
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}
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},
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},
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"url" : "https://yt3.ggpht.com/-bonZt347bMc/AAAAAAAAAAI/AAAAAAAAAAA/lR8QEKnqqHk/s240-c-k-no-mo-rj-c0xffffff/photo.jpg"
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}
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}
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}
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"publishedAt" : "2020-11-01T17:24:34.498Z",
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"kind" : "youtube#channel"
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