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[YouTube] Compile YoutubeThrottlingDecrypter pattern statically

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This commit is contained in:
XiangRongLin 2021-07-29 20:27:29 +02:00
parent 1c78976900
commit 2967d1ae6a
2 changed files with 12 additions and 7 deletions
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14
extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeThrottlingDecrypter.java
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@ -33,7 +33,10 @@ import java.util.regex.Pattern;
*/ */
public class YoutubeThrottlingDecrypter { public class YoutubeThrottlingDecrypter {
private static final String N_PARAM_REGEX = "[&?]n=([^&]+)"; private static final Pattern N_PARAM_PATTERN = Pattern.compile("[&?]n=([^&]+)");
private static final Pattern FUNCTION_NAME_PATTERN = Pattern.compile(
"b=a\\.get\\(\"n\"\\)\\)&&\\(b=(\\w+)\\(b\\),a\\.set\\(\"n\",b\\)");
private static final Map<String, String> nParams = new HashMap<>(); private static final Map<String, String> nParams = new HashMap<>();
private final String functionName; private final String functionName;
@ -62,9 +65,7 @@ public class YoutubeThrottlingDecrypter {
private String parseDecodeFunctionName(final String playerJsCode) private String parseDecodeFunctionName(final String playerJsCode)
throws Parser.RegexException { throws Parser.RegexException {
Pattern pattern = Pattern.compile( return Parser.matchGroup1(FUNCTION_NAME_PATTERN, playerJsCode);
"b=a\\.get\\(\"n\"\\)\\)&&\\(b=(\\w+)\\(b\\),a\\.set\\(\"n\",b\\)");
return Parser.matchGroup1(pattern, playerJsCode);
} }
@Nonnull @Nonnull
@ -86,12 +87,11 @@ public class YoutubeThrottlingDecrypter {
} }
private boolean containsNParam(final String url) { private boolean containsNParam(final String url) {
return Parser.isMatch(N_PARAM_REGEX, url); return Parser.isMatch(N_PARAM_PATTERN, url);
} }
private String parseNParam(final String url) throws Parser.RegexException { private String parseNParam(final String url) throws Parser.RegexException {
Pattern nValuePattern = Pattern.compile(N_PARAM_REGEX); return Parser.matchGroup1(N_PARAM_PATTERN, url);
return Parser.matchGroup1(nValuePattern, url);
} }
private String decryptNParam(final String nParam) { private String decryptNParam(final String nParam) {

5
extractor/src/main/java/org/schabi/newpipe/extractor/utils/Parser.java
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@ -84,6 +84,11 @@ public class Parser {
return mat.find(); return mat.find();
} }
public static boolean isMatch(Pattern pattern, String input) {
Matcher mat = pattern.matcher(input);
return mat.find();
}
public static Map<String, String> compatParseMap(final String input) throws UnsupportedEncodingException { public static Map<String, String> compatParseMap(final String input) throws UnsupportedEncodingException {
Map<String, String> map = new HashMap<>(); Map<String, String> map = new HashMap<>();
for (String arg : input.split("&")) { for (String arg : input.split("&")) {