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https://github.com/TeamNewPipe/NewPipeExtractor.git
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Merge pull request #1246 from Isira-Seneviratne/BufferedReader-lines
Use BufferedReader#lines()
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litetex
GitHub
commit
3a33cefbc0
@ -14,9 +14,12 @@ import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.UncheckedIOException;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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import java.util.Objects;
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import java.util.stream.Collectors;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipInputStream;
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@ -110,7 +113,7 @@ public class YoutubeSubscriptionExtractor extends SubscriptionExtractor {
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// Return it only if it has items (it exits early if it's the wrong file
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// format), otherwise try the next file
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if (csvItems.size() > 0) {
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if (!csvItems.isEmpty()) {
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return csvItems;
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}
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} catch (final ExtractionException e) {
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@ -138,69 +141,25 @@ public class YoutubeSubscriptionExtractor extends SubscriptionExtractor {
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// The first line is always a header
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// Header names are different based on the locale
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// Fortunately the data is always the same order no matter what locale
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int currentLine = 0;
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String line = "";
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try (BufferedReader br = new BufferedReader(new InputStreamReader(contentInputStream))) {
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final List<SubscriptionItem> subscriptionItems = new ArrayList<>();
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// ignore header and skip first line
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currentLine = 1;
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line = br.readLine();
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while ((line = br.readLine()) != null) {
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currentLine++;
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// Exit early if we've read the first few lines and we haven't added any items
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// It's likely we're in the wrong file
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if (currentLine > 5 && subscriptionItems.size() == 0) {
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break;
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}
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// First comma
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final int i1 = line.indexOf(",");
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if (i1 == -1) {
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continue;
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}
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// Second comma
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final int i2 = line.indexOf(",", i1 + 1);
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if (i2 == -1) {
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continue;
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}
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// Third comma or line length
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int i3 = line.indexOf(",", i2 + 1);
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if (i3 == -1) {
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i3 = line.length();
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}
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try (var reader = new BufferedReader(new InputStreamReader(contentInputStream))) {
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return reader.lines()
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.skip(1) // ignore header and skip first line
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.map(line -> line.split(","))
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.filter(values -> values.length >= 3)
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.map(values -> {
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// Channel URL from second entry
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final String channelUrl = line
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.substring(i1 + 1, i2)
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.replace("http://", "https://");
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if (!channelUrl.startsWith(BASE_CHANNEL_URL)) {
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continue;
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}
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// Channel title from third entry
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final String channelTitle = line.substring(i2 + 1, i3);
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final SubscriptionItem newItem
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= new SubscriptionItem(service.getServiceId(), channelUrl, channelTitle);
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subscriptionItems.add(newItem);
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}
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return subscriptionItems;
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} catch (final IOException e) {
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if (line == null) {
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line = "<null>";
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} else if (line.length() > 10) {
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line = line.substring(0, 10) + "...";
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}
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throw new InvalidSourceException("Error reading CSV file on line = \"" + line
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+ "\", line number = " + currentLine, e);
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final String channelUrl = values[1].replace("http://", "https://");
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return channelUrl.startsWith(BASE_CHANNEL_URL)
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? new SubscriptionItem(
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service.getServiceId(),
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channelUrl,
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values[2]) // Channel title from third entry
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: null;
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})
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.filter(Objects::nonNull)
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.collect(Collectors.toUnmodifiableList());
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} catch (final UncheckedIOException | IOException e) {
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throw new InvalidSourceException("Error reading CSV file", e);
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}
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}
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}
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@ -26,8 +26,7 @@ import java.util.List;
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/**
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* Test for {@link YoutubeSubscriptionExtractor}
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*/
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public class YoutubeSubscriptionExtractorTest {
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class YoutubeSubscriptionExtractorTest {
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private static YoutubeSubscriptionExtractor subscriptionExtractor;
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private static LinkHandlerFactory urlHandler;
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@ -41,7 +40,7 @@ public class YoutubeSubscriptionExtractorTest {
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}
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@Test
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public void testFromInputStream() throws Exception {
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void testFromInputStream() throws Exception {
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final List<SubscriptionItem> subscriptionItems = subscriptionExtractor.fromInputStream(
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new FileInputStream(resolveTestResource("youtube_takeout_import_test.json")));
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assertEquals(7, subscriptionItems.size());
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@ -55,14 +54,14 @@ public class YoutubeSubscriptionExtractorTest {
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}
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@Test
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public void testEmptySourceException() throws Exception {
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void testEmptySourceException() throws Exception {
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final List<SubscriptionItem> items = subscriptionExtractor.fromInputStream(
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new ByteArrayInputStream("[]".getBytes(StandardCharsets.UTF_8)));
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assertTrue(items.isEmpty());
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}
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@Test
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public void testSubscriptionWithEmptyTitleInSource() throws Exception {
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void testSubscriptionWithEmptyTitleInSource() throws Exception {
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final String source = "[{\"snippet\":{\"resourceId\":{\"channelId\":\"UCEOXxzW2vU0P-0THehuIIeg\"}}}]";
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final List<SubscriptionItem> items = subscriptionExtractor.fromInputStream(
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new ByteArrayInputStream(source.getBytes(StandardCharsets.UTF_8)));
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@ -74,7 +73,7 @@ public class YoutubeSubscriptionExtractorTest {
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}
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@Test
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public void testSubscriptionWithInvalidUrlInSource() throws Exception {
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void testSubscriptionWithInvalidUrlInSource() throws Exception {
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final String source = "[{\"snippet\":{\"resourceId\":{\"channelId\":\"gibberish\"},\"title\":\"name1\"}}," +
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"{\"snippet\":{\"resourceId\":{\"channelId\":\"UCEOXxzW2vU0P-0THehuIIeg\"},\"title\":\"name2\"}}]";
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final List<SubscriptionItem> items = subscriptionExtractor.fromInputStream(
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@ -87,8 +86,8 @@ public class YoutubeSubscriptionExtractorTest {
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}
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@Test
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public void testInvalidSourceException() {
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List<String> invalidList = Arrays.asList(
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void testInvalidSourceException() {
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final List<String> invalidList = Arrays.asList(
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"<xml><notvalid></notvalid></xml>",
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"<opml><notvalid></notvalid></opml>",
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"{\"a\":\"b\"}",
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@ -100,13 +99,14 @@ public class YoutubeSubscriptionExtractorTest {
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"\uD83D\uDC28\uD83D\uDC28\uD83D\uDC28",
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"gibberish");
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for (String invalidContent : invalidList) {
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for (final String invalidContent : invalidList) {
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try {
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byte[] bytes = invalidContent.getBytes(StandardCharsets.UTF_8);
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final byte[] bytes = invalidContent.getBytes(StandardCharsets.UTF_8);
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subscriptionExtractor.fromInputStream(new ByteArrayInputStream(bytes));
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fail("Extracting from \"" + invalidContent + "\" didn't throw an exception");
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} catch (final Exception e) {
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boolean correctType = e instanceof SubscriptionExtractor.InvalidSourceException;
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final boolean correctType =
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e instanceof SubscriptionExtractor.InvalidSourceException;
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if (!correctType) {
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e.printStackTrace();
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}
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@ -117,7 +117,7 @@ public class YoutubeSubscriptionExtractorTest {
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private static void assertSubscriptionItems(final List<SubscriptionItem> subscriptionItems)
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throws Exception {
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assertTrue(subscriptionItems.size() > 0);
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assertTrue(!subscriptionItems.isEmpty());
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for (final SubscriptionItem item : subscriptionItems) {
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assertNotNull(item.getName());
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@ -128,7 +128,7 @@ public class YoutubeSubscriptionExtractorTest {
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}
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@Test
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public void fromZipInputStream() throws Exception {
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void fromZipInputStream() throws Exception {
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final List<String> zipPaths = Arrays.asList(
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"youtube_takeout_import_test_1.zip",
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"youtube_takeout_import_test_2.zip"
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@ -144,13 +144,13 @@ public class YoutubeSubscriptionExtractorTest {
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}
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@Test
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public void fromCsvInputStream() throws Exception {
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void fromCsvInputStream() throws Exception {
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final List<String> csvPaths = Arrays.asList(
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"youtube_takeout_import_test_1.csv",
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"youtube_takeout_import_test_2.csv"
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);
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for (String path : csvPaths)
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for (final String path : csvPaths)
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{
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final File file = resolveTestResource(path);
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final FileInputStream fileInputStream = new FileInputStream(file);
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