Last change for http support, adding a simple reader for query strings and/or
url-encoded form data to support restful apis. Also exposed the mime to reader
and mime to writer via dictionaries in the MessageFormatOptions structure.
diff --git a/src/ProtocolBuffers.Serialization/Http/FormUrlEncodedReader.cs b/src/ProtocolBuffers.Serialization/Http/FormUrlEncodedReader.cs
new file mode 100644
index 0000000..508d76a
--- /dev/null
+++ b/src/ProtocolBuffers.Serialization/Http/FormUrlEncodedReader.cs
@@ -0,0 +1,162 @@
+using System;
+using System.IO;
+using System.Text;
+
+namespace Google.ProtocolBuffers.Serialization.Http
+{
+ /// <summary>
+ /// Allows reading messages from a name/value dictionary
+ /// </summary>
+ public class FormUrlEncodedReader : AbstractTextReader
+ {
+ private readonly TextReader _input;
+ private string _fieldName, _fieldValue;
+ private bool _ready;
+
+ /// <summary>
+ /// Creates a dictionary reader from an enumeration of KeyValuePair data, like an IDictionary
+ /// </summary>
+ FormUrlEncodedReader(TextReader input)
+ {
+ _input = input;
+ int ch = input.Peek();
+ if (ch == '?')
+ {
+ input.Read();
+ }
+ _ready = ReadNext();
+ }
+
+ #region CreateInstance overloads
+ /// <summary>
+ /// Constructs a FormUrlEncodedReader to parse form data, or url query text into a message.
+ /// </summary>
+ public static FormUrlEncodedReader CreateInstance(Stream stream)
+ {
+ return new FormUrlEncodedReader(new StreamReader(stream, Encoding.UTF8, false));
+ }
+
+ /// <summary>
+ /// Constructs a FormUrlEncodedReader to parse form data, or url query text into a message.
+ /// </summary>
+ public static FormUrlEncodedReader CreateInstance(byte[] bytes)
+ {
+ return new FormUrlEncodedReader(new StreamReader(new MemoryStream(bytes, false), Encoding.UTF8, false));
+ }
+
+ /// <summary>
+ /// Constructs a FormUrlEncodedReader to parse form data, or url query text into a message.
+ /// </summary>
+ public static FormUrlEncodedReader CreateInstance(string text)
+ {
+ return new FormUrlEncodedReader(new StringReader(text));
+ }
+
+ /// <summary>
+ /// Constructs a FormUrlEncodedReader to parse form data, or url query text into a message.
+ /// </summary>
+ public static FormUrlEncodedReader CreateInstance(TextReader input)
+ {
+ return new FormUrlEncodedReader(input);
+ }
+ #endregion
+
+ private bool ReadNext()
+ {
+ StringBuilder field = new StringBuilder(32);
+ StringBuilder value = new StringBuilder(64);
+ int ch;
+ while (-1 != (ch = _input.Read()) && ch != '=' && ch != '&')
+ {
+ field.Append((char)ch);
+ }
+
+ if (ch != -1 && ch != '&')
+ {
+ while (-1 != (ch = _input.Read()) && ch != '&')
+ {
+ value.Append((char)ch);
+ }
+ }
+
+ _fieldName = field.ToString();
+ _fieldValue = Uri.UnescapeDataString(value.Replace('+', ' ').ToString());
+
+ return !String.IsNullOrEmpty(_fieldName);
+ }
+
+ /// <summary>
+ /// No-op
+ /// </summary>
+ public override void ReadMessageStart()
+ { }
+
+ /// <summary>
+ /// No-op
+ /// </summary>
+ public override void ReadMessageEnd()
+ { }
+
+ /// <summary>
+ /// Merges the contents of stream into the provided message builder
+ /// </summary>
+ public override TBuilder Merge<TBuilder>(TBuilder builder, ExtensionRegistry registry)
+ {
+ builder.WeakMergeFrom(this, registry);
+ return builder;
+ }
+
+ /// <summary>
+ /// Causes the reader to skip past this field
+ /// </summary>
+ protected override void Skip()
+ {
+ _ready = ReadNext();
+ }
+
+ /// <summary>
+ /// Peeks at the next field in the input stream and returns what information is available.
+ /// </summary>
+ /// <remarks>
+ /// This may be called multiple times without actually reading the field. Only after the field
+ /// is either read, or skipped, should PeekNext return a different value.
+ /// </remarks>
+ protected override bool PeekNext(out string field)
+ {
+ field = _ready ? _fieldName : null;
+ return field != null;
+ }
+
+ /// <summary>
+ /// Returns true if it was able to read a String from the input
+ /// </summary>
+ protected override bool ReadAsText(ref string value, Type typeInfo)
+ {
+ if (_ready)
+ {
+ value = _fieldValue;
+ _ready = ReadNext();
+ return true;
+ }
+ return false;
+ }
+
+ /// <summary>
+ /// It's unlikely this will work for anything but text data as bytes UTF8 are transformed to text and back to bytes
+ /// </summary>
+ protected override ByteString DecodeBytes(string bytes)
+ { return ByteString.CopyFromUtf8(bytes); }
+
+ /// <summary>
+ /// Not Supported
+ /// </summary>
+ public override bool ReadGroup(IBuilderLite value, ExtensionRegistry registry)
+ { throw new NotSupportedException(); }
+
+ /// <summary>
+ /// Not Supported
+ /// </summary>
+ protected override bool ReadMessage(IBuilderLite builder, ExtensionRegistry registry)
+ { throw new NotSupportedException(); }
+ }
+}
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