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1 ???using System; |
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2 using System.IO; |
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3 using System.Text; |
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4 using System.Collections.Generic; |
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5 using UCIS.Pml; |
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6 |
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7 namespace UCIS.Pml { |
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8 internal enum AmfDataType : byte { |
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9 Number = 0, |
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10 Boolean = 1, |
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11 String = 2, |
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12 UntypedObject = 3, |
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13 MovieClip = 4, |
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14 Null = 5, |
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15 Undefined = 6, |
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16 ReferencedObject = 7, |
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17 MixedArray = 8, |
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18 End = 9, |
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19 Array = 10, |
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20 Date = 11, |
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21 LongString = 12, |
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22 TypeAsObject = 13, |
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23 Recordset = 14, |
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24 Xml = 15, |
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25 TypedObject = 16 |
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26 } |
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27 public class PmlAmfWriter : IPmlWriter { |
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28 private BinaryWriter pWriter; |
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29 |
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30 public PmlAmfWriter(BinaryWriter Writer) { |
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31 pWriter = Writer; |
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32 } |
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33 public PmlAmfWriter(Stream Stream) { |
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34 pWriter = new BinaryWriter(Stream, Encoding.UTF8); |
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35 } |
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36 |
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37 public BinaryWriter BaseWriter { |
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38 get { return pWriter; } |
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39 set { pWriter = value; } |
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40 } |
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41 |
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42 public void WriteMessage(PmlElement Message) { |
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43 WriteMessageTo(Message, pWriter); |
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44 } |
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45 |
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46 public static void WriteMessageTo(PmlElement Message, BinaryWriter Writer) { |
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47 lock (Writer) { |
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48 WriteElementTo(Message, Writer); |
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49 Writer.Flush(); |
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50 } |
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51 } |
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52 |
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53 private static void WriteElementTo(PmlElement Element, BinaryWriter Writer) { |
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54 if (Element == null) { |
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55 Writer.Write((byte)AmfDataType.Null); |
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56 return; |
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57 } |
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58 switch (Element.Type) { |
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59 case PmlType.Null: |
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60 Writer.Write((byte)AmfDataType.Null); |
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61 break; |
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62 case PmlType.Dictionary: |
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63 Writer.Write((byte)AmfDataType.UntypedObject); |
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64 //WriteDictionary(Writer, (PmlDictionary)Element); |
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65 WriteUntypedObject(Writer, (PmlDictionary)Element); |
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66 break; |
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67 case PmlType.Collection: |
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68 Writer.Write((byte)AmfDataType.Array); |
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69 WriteCollection(Writer, (PmlCollection)Element); |
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70 break; |
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71 case PmlType.Binary: |
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72 Writer.Write((byte)AmfDataType.String); |
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73 byte[] bytes = Element.ToByteArray(); |
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74 if (bytes.Length > UInt16.MaxValue) { |
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75 Writer.Write((byte)AmfDataType.String); |
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76 WriteString(Writer, bytes); |
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77 } else { |
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78 Writer.Write((byte)AmfDataType.LongString); |
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79 WriteLongString(Writer, bytes); |
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80 } |
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81 break; |
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82 case PmlType.String: |
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83 string str = Element.ToString(); |
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84 if (str.Length < UInt16.MaxValue) { |
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85 Writer.Write((byte)AmfDataType.String); |
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86 WriteString(Writer, str); |
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87 } else { |
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88 Writer.Write((byte)AmfDataType.LongString); |
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89 WriteLongString(Writer, str); |
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90 } |
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91 break; |
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92 case PmlType.Integer: |
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93 Writer.Write((byte)AmfDataType.Number); |
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94 WriteDouble(Writer, (Element as PmlInteger).ToDouble()); |
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95 break; |
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96 } |
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97 } |
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98 private static void WriteEnd(BinaryWriter w) { |
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99 WriteUInt16(w, 0); |
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100 w.Write((byte)AmfDataType.End); |
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101 } |
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102 private static void WriteUntypedObject(BinaryWriter w, PmlDictionary value) { |
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103 foreach (KeyValuePair<String, PmlElement> kvp in value) { |
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104 WriteString(w, kvp.Key); |
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105 WriteElementTo(kvp.Value, w); |
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106 } |
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107 WriteEnd(w); |
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108 } |
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109 private static void WriteDictionary(BinaryWriter w, PmlDictionary value) { |
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110 WriteUInt32(w, (UInt32)value.Count); |
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111 foreach (KeyValuePair<String, PmlElement> kvp in value) { |
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112 WriteString(w, kvp.Key); |
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113 WriteElementTo(kvp.Value, w); |
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114 } |
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115 } |
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116 private static void WriteCollection(BinaryWriter w, PmlCollection value) { |
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117 WriteUInt32(w,(UInt32)value.Count); |
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118 foreach (PmlElement o in value) { |
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119 WriteElementTo(o, w); |
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120 } |
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121 } |
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122 private static void WriteDouble(BinaryWriter w, double value) { |
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123 WriteReverse(w, BitConverter.GetBytes(value)); |
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124 } |
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125 private static void WriteUInt32(BinaryWriter w, UInt32 value) { |
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126 WriteReverse(w, BitConverter.GetBytes(value)); |
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127 } |
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128 private static void WriteUInt16(BinaryWriter w, UInt16 value) { |
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129 WriteReverse(w, BitConverter.GetBytes(value)); |
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130 } |
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131 private static void WriteString(BinaryWriter w, string value) { |
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132 WriteString(w, Encoding.UTF8.GetBytes(value)); |
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133 } |
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134 private static void WriteLongString(BinaryWriter w, string value) { |
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135 WriteLongString(w, Encoding.UTF8.GetBytes(value)); |
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136 } |
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137 private static void WriteString(BinaryWriter w, byte[] buffer) { |
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138 WriteUInt16(w, (UInt16)buffer.Length); |
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139 w.Write(buffer, 0, buffer.Length); |
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140 } |
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141 private static void WriteLongString(BinaryWriter w, byte[] buffer) { |
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142 WriteUInt32(w, (UInt32)buffer.Length); |
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143 w.Write(buffer, 0, buffer.Length); |
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144 } |
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145 private static void WriteReverse(BinaryWriter w, byte[] value) { |
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146 Array.Reverse(value); |
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147 w.Write(value); |
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148 } |
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149 } |
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150 |
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151 public class PmlAmfReader : IPmlReader { |
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152 private BinaryReader pReader; |
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153 |
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154 public PmlAmfReader(BinaryReader Reader) { |
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155 pReader = Reader; |
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156 } |
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157 public PmlAmfReader(Stream Stream) { |
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158 pReader = new BinaryReader(Stream, Encoding.UTF8); |
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159 } |
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160 |
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161 public BinaryReader BaseReader { |
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162 get { return pReader; } |
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163 set { pReader = value; } |
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164 } |
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165 |
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166 public PmlElement ReadMessage() { |
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167 return ReadMessageFrom(pReader); |
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168 } |
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169 |
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170 public static PmlElement ReadMessageFrom(BinaryReader Reader) { |
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171 PmlElement Element = null; |
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172 lock (Reader) { |
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173 Element = ReadElementFrom(Reader); |
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174 } |
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175 return Element; |
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176 } |
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177 |
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178 |
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179 private static PmlElement ReadElementFrom(BinaryReader Reader) { |
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180 AmfDataType EType = (AmfDataType)Reader.ReadByte(); |
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181 return ReadData(Reader, EType); |
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182 } |
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183 private static PmlElement ReadData(BinaryReader Reader, AmfDataType EType) { |
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184 switch (EType) { |
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185 case AmfDataType.Number: |
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186 Double d = ReadDouble(Reader); |
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187 if (d == (double)(Int64)d) { |
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188 return new PmlInteger((Int64)d); |
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189 } else if (d == (double)(UInt64)d) { |
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190 return new PmlInteger((UInt64)d); |
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191 } else { |
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192 return new PmlString(d.ToString()); |
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193 } |
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194 case AmfDataType.Boolean: |
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195 return new PmlInteger(Reader.ReadByte()); |
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196 case AmfDataType.String: |
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197 return new PmlString(ReadShortString(Reader)); |
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198 case AmfDataType.Array: |
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199 PmlCollection ElementC = new PmlCollection(); |
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200 int size = ReadInt32(Reader); |
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201 for (int i = 0; i < size; ++i) { |
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202 ElementC.Add(ReadElementFrom(Reader)); |
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203 } |
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204 return ElementC; |
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205 case AmfDataType.Date: |
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206 return new PmlString(ReadDate(Reader).ToString()); |
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207 case AmfDataType.LongString: |
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208 return new PmlString(ReadLongString(Reader)); |
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209 case AmfDataType.TypedObject: |
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210 ReadShortString(Reader); |
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211 return ReadUntypedObject(Reader); |
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212 case AmfDataType.MixedArray: |
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213 return ReadDictionary(Reader); |
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214 case AmfDataType.Null: |
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215 case AmfDataType.Undefined: |
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216 case AmfDataType.End: |
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217 return new PmlNull(); |
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218 case AmfDataType.UntypedObject: |
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219 return ReadUntypedObject(Reader); |
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220 case AmfDataType.Xml: |
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221 return new PmlString(ReadLongString(Reader)); |
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222 case AmfDataType.MovieClip: |
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223 case AmfDataType.ReferencedObject: |
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224 case AmfDataType.TypeAsObject: |
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225 case AmfDataType.Recordset: |
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226 default: |
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227 throw new NotSupportedException("The AMF type is not supported: " + EType.ToString()); |
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228 } |
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229 } |
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230 |
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231 private static PmlDictionary ReadUntypedObject(BinaryReader Reader) { |
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232 PmlDictionary ElementD = new PmlDictionary(); |
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233 string key = ReadShortString(Reader); |
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234 for (byte type = Reader.ReadByte(); type != 9; type = Reader.ReadByte()) { |
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235 ElementD.Add(key, ReadData(Reader, (AmfDataType)type)); |
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236 key = ReadShortString(Reader); |
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237 } |
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238 return ElementD; |
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239 } |
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240 private static PmlDictionary ReadDictionary(BinaryReader Reader) { |
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241 PmlDictionary ElementD = new PmlDictionary(); |
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242 int size = ReadInt32(Reader); |
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243 return ReadUntypedObject(Reader); |
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244 } |
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245 |
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246 private static DateTime ReadDate(BinaryReader r) { |
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247 double ms = ReadDouble(r); |
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248 DateTime date = (new DateTime(1970, 1, 1)).AddMilliseconds(ms); |
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249 ReadUInt16(r); //gets the timezone |
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250 return date; |
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251 } |
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252 private static double ReadDouble(BinaryReader r) { |
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253 return BitConverter.ToDouble(ReadReverse(r, 8), 0); |
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254 } |
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255 |
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256 private static int ReadInt32(BinaryReader r) { |
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257 return BitConverter.ToInt32(ReadReverse(r, 4), 0); |
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258 } |
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259 |
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260 private static ushort ReadUInt16(BinaryReader r) { |
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261 return BitConverter.ToUInt16(ReadReverse(r, 2), 0); |
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262 } |
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263 |
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264 private static byte[] ReadReverse(BinaryReader r, int size) { |
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265 byte[] buffer = r.ReadBytes(size); |
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266 Array.Reverse(buffer); |
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267 return buffer; |
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268 } |
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269 private static string ReadLongString(BinaryReader r) { |
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270 int length = ReadInt32(r); |
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271 return ReadString(r, length); |
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272 } |
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273 private static string ReadShortString(BinaryReader r) { |
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274 int length = ReadUInt16(r); |
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275 return ReadString(r, length); |
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276 } |
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277 private static string ReadString(BinaryReader r, int length) { |
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278 byte[] buffer = r.ReadBytes(length); |
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279 return Encoding.UTF8.GetString(buffer); |
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280 } |
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281 } |
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282 } |
