SAPE, NewMessage (GET)

1 files changed, 221 insertions, 0 deletions

diff --git a/src/java/ru/sape/SerializedPhpParser.java b/src/java/ru/sape/SerializedPhpParser.java
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+/*
+Copyright (c) 2007 Zsolt Szász <zsolt at lorecraft dot com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package ru.sape;
+
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.regex.Pattern;
+
+/**
+ * Deserializes a serialized PHP data structure into corresponding Java objects. It supports
+ * the integer, float, boolean, string primitives that are mapped to their Java
+ * equivalent, plus arrays that are parsed into <code>Map</code> instances and objects
+ * that are represented by {@link SerializedPhpParser.PhpObject} instances.
+ * <p>
+ * Example of use:
+ * <pre>
+ *      String input = "O:8:"TypeName":1:{s:3:"foo";s:3:"bar";}";
+ *      SerializedPhpParser serializedPhpParser = new SerializedPhpParser(input);
+ *      Object result = serializedPhpParser.parse();
+ * </pre>
+ *
+ * The <code>result</code> object will be a <code>PhpObject</code> with the name "TypeName" and
+ * the attribute "foo" = "bar".
+ */
+class SerializedPhpParser {
+
+    private final String input;
+    private int index;
+    private boolean assumeUTF8 = true;
+    private Pattern acceptedAttributeNameRegex = null;
+
+    public SerializedPhpParser(String input) {
+        this.input = input;
+    }
+
+    public Object parse() {
+        char type = input.charAt(index);
+        switch (type) {
+            case 'i':
+                index += 2;
+                return parseInt();
+            case 'd':
+                index += 2;
+                return parseFloat();
+            case 'b':
+                index += 2;
+                return parseBoolean();
+            case 's':
+                index += 2;
+                return parseString();
+            case 'a':
+                index += 2;
+                return parseArray();
+            case 'O':
+                index += 2;
+                return parseObject();
+            case 'N':
+                index += 2;
+                return NULL;
+            default:
+                throw new IllegalStateException("Encountered unknown type [" + type + "], str=" + input.substring(index));
+        }
+    }
+
+    private Object parseObject() {
+        PhpObject phpObject = new PhpObject();
+        int strLen = readLength();
+        phpObject.name = input.substring(index, index + strLen);
+        index = index + strLen + 2;
+        int attrLen = readLength();
+        for (int i = 0; i < attrLen; i++) {
+            Object key = parse();
+            Object value = parse();
+            if (isAcceptedAttribute(key)) {
+                phpObject.attributes.put(key, value);
+            }
+        }
+        index++;
+        return phpObject;
+    }
+
+    private Map<Object, Object> parseArray() {
+        int arrayLen = readLength();
+        Map<Object, Object> result = new LinkedHashMap<Object, Object>();
+        for (int i = 0; i < arrayLen; i++) {
+            Object key = parse();
+            Object value = parse();
+            if (isAcceptedAttribute(key)) {
+                result.put(key, value);
+            }
+        }
+        index++;
+        return result;
+    }
+
+    private boolean isAcceptedAttribute(Object key) {
+        if (acceptedAttributeNameRegex == null) {
+            return true;
+        }
+        if (!(key instanceof String)) {
+            return true;
+        }
+        return acceptedAttributeNameRegex.matcher((String) key).matches();
+    }
+
+    private int readLength() {
+        int delimiter = input.indexOf(':', index);
+        int arrayLen = Integer.valueOf(input.substring(index, delimiter));
+        index = delimiter + 2;
+        return arrayLen;
+    }
+
+    /**
+     * Assumes strings are utf8 encoded
+     *
+     * @return
+     */
+    private String parseString() {
+        int strLen = readLength();
+
+        int utfStrLen = 0;
+        int byteCount = 0;
+        while (byteCount != strLen) {
+            char ch = input.charAt(index + utfStrLen++);
+
+            /*
+            if (ch == '\'') {
+            utfStrLen -= 1;
+            break;
+            }
+             */
+
+            if (assumeUTF8) {
+                if ((ch >= 0x0001) && (ch <= 0x007F)) {
+                    byteCount++;
+                } else if (ch > 0x07FF) {
+                    byteCount += 3;
+                } else {
+                    byteCount += 2;
+                }
+            } else {
+                byteCount++;
+            }
+        }
+        String value = input.substring(index, index + utfStrLen);
+        index = index + utfStrLen + 2;
+        return value;
+    }
+
+    private Boolean parseBoolean() {
+        int delimiter = input.indexOf(';', index);
+        String value = input.substring(index, delimiter);
+        if (value.equals("1")) {
+            value = "true";
+        } else if (value.equals("0")) {
+            value = "false";
+        }
+        index = delimiter + 1;
+        return Boolean.valueOf(value);
+    }
+
+    private Double parseFloat() {
+        int delimiter = input.indexOf(';', index);
+        String value = input.substring(index, delimiter);
+        index = delimiter + 1;
+        return Double.valueOf(value);
+    }
+
+    private Integer parseInt() {
+        int delimiter = input.indexOf(';', index);
+        String value = input.substring(index, delimiter);
+        index = delimiter + 1;
+        return Integer.valueOf(value);
+    }
+
+    public void setAcceptedAttributeNameRegex(String acceptedAttributeNameRegex) {
+        this.acceptedAttributeNameRegex = Pattern.compile(acceptedAttributeNameRegex);
+    }
+    public static final Object NULL = new Object() {
+
+        @Override
+        public String toString() {
+            return "NULL";
+        }
+    };
+
+    /**
+     * Represents an object that has a name and a map of attributes
+     */
+    public static class PhpObject {
+
+        public String name;
+        public Map<Object, Object> attributes = new HashMap<Object, Object>();
+
+        @Override
+        public String toString() {
+            return "\"" + name + "\" : " + attributes.toString();
+        }
+    }
+}