Add GalleryPageApiParser

app/src/main/java/com/hippo/ehviewer/client/parser/GalleryPageApiParser.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2019 Hippo Seven
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.ehviewer.client.parser;
+
+import android.text.TextUtils;
+import com.hippo.ehviewer.client.exception.ParseException;
+import com.hippo.yorozuya.StringUtils;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+public class GalleryPageApiParser {
+
+    private static final Pattern PATTERN_IMAGE_URL = Pattern.compile("<img[^>]*src=\"([^\"]+)\" style");
+    private static final Pattern PATTERN_SKIP_HATH_KEY = Pattern.compile("onclick=\"return nl\\('([^\\)]+)'\\)");
+    private static final Pattern PATTERN_ORIGIN_IMAGE_URL = Pattern.compile("<a href=\"([^\"]+)fullimg.php([^\"]+)\">");
+
+    public static Result parse(String body) throws ParseException {
+        try {
+            Matcher m;
+            Result result = new Result();
+
+            JSONObject jo = new JSONObject(body);
+            if (jo.has("error")) {
+                throw new ParseException(jo.getString("error"), body);
+            }
+
+            String i3 = jo.getString("i3");
+            m = PATTERN_IMAGE_URL.matcher(i3);
+            if (m.find()) {
+                result.imageUrl = StringUtils.unescapeXml(StringUtils.trim(m.group(1)));
+            }
+            String i6 = jo.getString("i6");
+            m = PATTERN_SKIP_HATH_KEY.matcher(i6);
+            if (m.find()) {
+                result.skipHathKey = StringUtils.unescapeXml(StringUtils.trim(m.group(1)));
+            }
+            String i7 = jo.getString("i7");
+            m = PATTERN_ORIGIN_IMAGE_URL.matcher(i7);
+            if (m.find()) {
+                result.originImageUrl = StringUtils.unescapeXml(m.group(1)) + "fullimg.php" + StringUtils.unescapeXml(m.group(2));
+            }
+
+            if (!TextUtils.isEmpty(result.imageUrl)) {
+                return result;
+            } else {
+                throw new ParseException("Parse image url and skip hath key error", body);
+            }
+        } catch (JSONException e) {
+            throw new ParseException("Can't parse json", body, e);
+        }
+    }
+
+    public static class Result {
+        public String imageUrl;
+        public String skipHathKey;
+        public String originImageUrl;
+    }
+}