Added ripper for rule34.xxx

src/main/java/com/rarchives/ripme/ripper/rippers/Rule34Ripper.java

@@ -0,0 +1,84 @@
+package com.rarchives.ripme.ripper.rippers;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.jsoup.nodes.Document;
+import org.jsoup.nodes.Element;
+
+import com.rarchives.ripme.ripper.AbstractHTMLRipper;
+import com.rarchives.ripme.utils.Http;
+
+public class Rule34Ripper extends AbstractHTMLRipper {
+
+    public Rule34Ripper(URL url) throws IOException {
+        super(url);
+    }
+
+    private String apiUrl;
+    private int pageNumber = 0;
+
+    @Override
+    public String getHost() {
+        return "rule34";
+    }
+
+    @Override
+    public String getDomain() {
+        return "rule34.xxx";
+    }
+
+    @Override
+    public String getGID(URL url) throws MalformedURLException {
+        Pattern p = Pattern.compile("https?://rule34.xxx/index.php\\?page=post&s=list&tags=([\\S]+)");
+        Matcher m = p.matcher(url.toExternalForm());
+        if (m.matches()) {
+            return m.group(1);
+        }
+        throw new MalformedURLException("Expected rule34.xxx URL format: " +
+                "rule34.xxx/index.php\\?page=post&s=list&tags=TAG - got " + url + " instead");
+    }
+
+    public URL getAPIUrl() throws MalformedURLException {
+        URL urlToReturn = new URL("https://rule34.xxx/index.php?page=dapi&s=post&q=index&limit=100&tags=" + getGID(url));
+        return urlToReturn;
+    }
+
+    @Override
+    public Document getFirstPage() throws IOException {
+        apiUrl = getAPIUrl().toExternalForm();
+        // "url" is an instance field of the superclass
+        return Http.url(getAPIUrl()).get();
+    }
+
+    @Override
+    public Document getNextPage(Document doc) throws IOException {
+        if (doc.html().contains("Search error: API limited due to abuse")) {
+            throw new IOException("No more pages");
+        }
+        pageNumber += 1;
+        String nextPage = apiUrl + "&pid=" + pageNumber;
+        return Http.url(nextPage).get();
+    }
+
+    @Override
+    public List<String> getURLsFromPage(Document doc) {
+        List<String> result = new ArrayList<>();
+        for (Element el : doc.select("posts > post")) {
+            String imageSource = el.select("post").attr("file_url");
+            result.add(imageSource);
+
+        }
+        return result;
+    }
+
+    @Override
+    public void downloadURL(URL url, int index) {
+        addURLToDownload(url, getPrefix(index));
+    }
+}

src/main/java/com/rarchives/ripme/ripper/rippers/rule34Ripper.java

@@ -0,0 +1,4 @@
+package com.rarchives.ripme.ripper.rippers;
+
+public class rule34Ripper {
+}