| #region Copyright notice and license |
| // Protocol Buffers - Google's data interchange format |
| // Copyright 2015 Google Inc. All rights reserved. |
| // https://developers.google.com/protocol-buffers/ |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| #endregion |
| |
| using System; |
| using System.Collections; |
| using System.Globalization; |
| using System.Text; |
| using Google.Protobuf.Reflection; |
| using Google.Protobuf.WellKnownTypes; |
| using System.IO; |
| using System.Linq; |
| using System.Collections.Generic; |
| using System.Reflection; |
| |
| namespace Google.Protobuf |
| { |
| /// <summary> |
| /// Reflection-based converter from messages to JSON. |
| /// </summary> |
| /// <remarks> |
| /// <para> |
| /// Instances of this class are thread-safe, with no mutable state. |
| /// </para> |
| /// <para> |
| /// This is a simple start to get JSON formatting working. As it's reflection-based, |
| /// it's not as quick as baking calls into generated messages - but is a simpler implementation. |
| /// (This code is generally not heavily optimized.) |
| /// </para> |
| /// </remarks> |
| public sealed class JsonFormatter |
| { |
| internal const string AnyTypeUrlField = "@type"; |
| internal const string AnyDiagnosticValueField = "@value"; |
| internal const string AnyWellKnownTypeValueField = "value"; |
| private const string TypeUrlPrefix = "type.googleapis.com"; |
| private const string NameValueSeparator = ": "; |
| private const string PropertySeparator = ", "; |
| |
| /// <summary> |
| /// Returns a formatter using the default settings. |
| /// </summary> |
| public static JsonFormatter Default { get; } = new JsonFormatter(Settings.Default); |
| |
| // A JSON formatter which *only* exists |
| private static readonly JsonFormatter diagnosticFormatter = new JsonFormatter(Settings.Default); |
| |
| /// <summary> |
| /// The JSON representation of the first 160 characters of Unicode. |
| /// Empty strings are replaced by the static constructor. |
| /// </summary> |
| private static readonly string[] CommonRepresentations = { |
| // C0 (ASCII and derivatives) control characters |
| "\\u0000", "\\u0001", "\\u0002", "\\u0003", // 0x00 |
| "\\u0004", "\\u0005", "\\u0006", "\\u0007", |
| "\\b", "\\t", "\\n", "\\u000b", |
| "\\f", "\\r", "\\u000e", "\\u000f", |
| "\\u0010", "\\u0011", "\\u0012", "\\u0013", // 0x10 |
| "\\u0014", "\\u0015", "\\u0016", "\\u0017", |
| "\\u0018", "\\u0019", "\\u001a", "\\u001b", |
| "\\u001c", "\\u001d", "\\u001e", "\\u001f", |
| // Escaping of " and \ are required by www.json.org string definition. |
| // Escaping of < and > are required for HTML security. |
| "", "", "\\\"", "", "", "", "", "", // 0x20 |
| "", "", "", "", "", "", "", "", |
| "", "", "", "", "", "", "", "", // 0x30 |
| "", "", "", "", "\\u003c", "", "\\u003e", "", |
| "", "", "", "", "", "", "", "", // 0x40 |
| "", "", "", "", "", "", "", "", |
| "", "", "", "", "", "", "", "", // 0x50 |
| "", "", "", "", "\\\\", "", "", "", |
| "", "", "", "", "", "", "", "", // 0x60 |
| "", "", "", "", "", "", "", "", |
| "", "", "", "", "", "", "", "", // 0x70 |
| "", "", "", "", "", "", "", "\\u007f", |
| // C1 (ISO 8859 and Unicode) extended control characters |
| "\\u0080", "\\u0081", "\\u0082", "\\u0083", // 0x80 |
| "\\u0084", "\\u0085", "\\u0086", "\\u0087", |
| "\\u0088", "\\u0089", "\\u008a", "\\u008b", |
| "\\u008c", "\\u008d", "\\u008e", "\\u008f", |
| "\\u0090", "\\u0091", "\\u0092", "\\u0093", // 0x90 |
| "\\u0094", "\\u0095", "\\u0096", "\\u0097", |
| "\\u0098", "\\u0099", "\\u009a", "\\u009b", |
| "\\u009c", "\\u009d", "\\u009e", "\\u009f" |
| }; |
| |
| static JsonFormatter() |
| { |
| for (int i = 0; i < CommonRepresentations.Length; i++) |
| { |
| if (CommonRepresentations[i] == "") |
| { |
| CommonRepresentations[i] = ((char) i).ToString(); |
| } |
| } |
| } |
| |
| private readonly Settings settings; |
| |
| private bool DiagnosticOnly => ReferenceEquals(this, diagnosticFormatter); |
| |
| /// <summary> |
| /// Creates a new formatted with the given settings. |
| /// </summary> |
| /// <param name="settings">The settings.</param> |
| public JsonFormatter(Settings settings) |
| { |
| this.settings = ProtoPreconditions.CheckNotNull(settings, nameof(settings)); |
| } |
| |
| /// <summary> |
| /// Formats the specified message as JSON. |
| /// </summary> |
| /// <param name="message">The message to format.</param> |
| /// <returns>The formatted message.</returns> |
| public string Format(IMessage message) |
| { |
| var writer = new StringWriter(); |
| Format(message, writer); |
| return writer.ToString(); |
| } |
| |
| /// <summary> |
| /// Formats the specified message as JSON. |
| /// </summary> |
| /// <param name="message">The message to format.</param> |
| /// <param name="writer">The TextWriter to write the formatted message to.</param> |
| /// <returns>The formatted message.</returns> |
| public void Format(IMessage message, TextWriter writer) |
| { |
| ProtoPreconditions.CheckNotNull(message, nameof(message)); |
| ProtoPreconditions.CheckNotNull(writer, nameof(writer)); |
| |
| if (message.Descriptor.IsWellKnownType) |
| { |
| WriteWellKnownTypeValue(writer, message.Descriptor, message); |
| } |
| else |
| { |
| WriteMessage(writer, message); |
| } |
| } |
| |
| /// <summary> |
| /// Converts a message to JSON for diagnostic purposes with no extra context. |
| /// </summary> |
| /// <remarks> |
| /// <para> |
| /// This differs from calling <see cref="Format(IMessage)"/> on the default JSON |
| /// formatter in its handling of <see cref="Any"/>. As no type registry is available |
| /// in <see cref="object.ToString"/> calls, the normal way of resolving the type of |
| /// an <c>Any</c> message cannot be applied. Instead, a JSON property named <c>@value</c> |
| /// is included with the base64 data from the <see cref="Any.Value"/> property of the message. |
| /// </para> |
| /// <para>The value returned by this method is only designed to be used for diagnostic |
| /// purposes. It may not be parsable by <see cref="JsonParser"/>, and may not be parsable |
| /// by other Protocol Buffer implementations.</para> |
| /// </remarks> |
| /// <param name="message">The message to format for diagnostic purposes.</param> |
| /// <returns>The diagnostic-only JSON representation of the message</returns> |
| public static string ToDiagnosticString(IMessage message) |
| { |
| ProtoPreconditions.CheckNotNull(message, nameof(message)); |
| return diagnosticFormatter.Format(message); |
| } |
| |
| private void WriteMessage(TextWriter writer, IMessage message) |
| { |
| if (message == null) |
| { |
| WriteNull(writer); |
| return; |
| } |
| if (DiagnosticOnly) |
| { |
| ICustomDiagnosticMessage customDiagnosticMessage = message as ICustomDiagnosticMessage; |
| if (customDiagnosticMessage != null) |
| { |
| writer.Write(customDiagnosticMessage.ToDiagnosticString()); |
| return; |
| } |
| } |
| writer.Write("{ "); |
| bool writtenFields = WriteMessageFields(writer, message, false); |
| writer.Write(writtenFields ? " }" : "}"); |
| } |
| |
| private bool WriteMessageFields(TextWriter writer, IMessage message, bool assumeFirstFieldWritten) |
| { |
| var fields = message.Descriptor.Fields; |
| bool first = !assumeFirstFieldWritten; |
| // First non-oneof fields |
| foreach (var field in fields.InFieldNumberOrder()) |
| { |
| var accessor = field.Accessor; |
| var value = accessor.GetValue(message); |
| if (!ShouldFormatFieldValue(message, field, value)) |
| { |
| continue; |
| } |
| |
| if (!first) |
| { |
| writer.Write(PropertySeparator); |
| } |
| |
| WriteString(writer, accessor.Descriptor.JsonName); |
| writer.Write(NameValueSeparator); |
| WriteValue(writer, value); |
| |
| first = false; |
| } |
| return !first; |
| } |
| |
| /// <summary> |
| /// Determines whether or not a field value should be serialized according to the field, |
| /// its value in the message, and the settings of this formatter. |
| /// </summary> |
| private bool ShouldFormatFieldValue(IMessage message, FieldDescriptor field, object value) => |
| field.HasPresence |
| // Fields that support presence *just* use that |
| ? field.Accessor.HasValue(message) |
| // Otherwise, format if either we've been asked to format default values, or if it's |
| // not a default value anyway. |
| : settings.FormatDefaultValues || !IsDefaultValue(field, value); |
| |
| // Converted from java/core/src/main/java/com/google/protobuf/Descriptors.java |
| internal static string ToJsonName(string name) |
| { |
| StringBuilder result = new StringBuilder(name.Length); |
| bool isNextUpperCase = false; |
| foreach (char ch in name) |
| { |
| if (ch == '_') |
| { |
| isNextUpperCase = true; |
| } |
| else if (isNextUpperCase) |
| { |
| result.Append(char.ToUpperInvariant(ch)); |
| isNextUpperCase = false; |
| } |
| else |
| { |
| result.Append(ch); |
| } |
| } |
| return result.ToString(); |
| } |
| |
| internal static string FromJsonName(string name) |
| { |
| StringBuilder result = new StringBuilder(name.Length); |
| foreach (char ch in name) |
| { |
| if (char.IsUpper(ch)) |
| { |
| result.Append('_'); |
| result.Append(char.ToLowerInvariant(ch)); |
| } |
| else |
| { |
| result.Append(ch); |
| } |
| } |
| return result.ToString(); |
| } |
| |
| private static void WriteNull(TextWriter writer) |
| { |
| writer.Write("null"); |
| } |
| |
| private static bool IsDefaultValue(FieldDescriptor descriptor, object value) |
| { |
| if (descriptor.IsMap) |
| { |
| IDictionary dictionary = (IDictionary) value; |
| return dictionary.Count == 0; |
| } |
| if (descriptor.IsRepeated) |
| { |
| IList list = (IList) value; |
| return list.Count == 0; |
| } |
| switch (descriptor.FieldType) |
| { |
| case FieldType.Bool: |
| return (bool) value == false; |
| case FieldType.Bytes: |
| return (ByteString) value == ByteString.Empty; |
| case FieldType.String: |
| return (string) value == ""; |
| case FieldType.Double: |
| return (double) value == 0.0; |
| case FieldType.SInt32: |
| case FieldType.Int32: |
| case FieldType.SFixed32: |
| case FieldType.Enum: |
| return (int) value == 0; |
| case FieldType.Fixed32: |
| case FieldType.UInt32: |
| return (uint) value == 0; |
| case FieldType.Fixed64: |
| case FieldType.UInt64: |
| return (ulong) value == 0; |
| case FieldType.SFixed64: |
| case FieldType.Int64: |
| case FieldType.SInt64: |
| return (long) value == 0; |
| case FieldType.Float: |
| return (float) value == 0f; |
| case FieldType.Message: |
| case FieldType.Group: // Never expect to get this, but... |
| return value == null; |
| default: |
| throw new ArgumentException("Invalid field type"); |
| } |
| } |
| |
| /// <summary> |
| /// Writes a single value to the given writer as JSON. Only types understood by |
| /// Protocol Buffers can be written in this way. This method is only exposed for |
| /// advanced use cases; most users should be using <see cref="Format(IMessage)"/> |
| /// or <see cref="Format(IMessage, TextWriter)"/>. |
| /// </summary> |
| /// <param name="writer">The writer to write the value to. Must not be null.</param> |
| /// <param name="value">The value to write. May be null.</param> |
| public void WriteValue(TextWriter writer, object value) |
| { |
| if (value == null || value is NullValue) |
| { |
| WriteNull(writer); |
| } |
| else if (value is bool) |
| { |
| writer.Write((bool)value ? "true" : "false"); |
| } |
| else if (value is ByteString) |
| { |
| // Nothing in Base64 needs escaping |
| writer.Write('"'); |
| writer.Write(((ByteString)value).ToBase64()); |
| writer.Write('"'); |
| } |
| else if (value is string) |
| { |
| WriteString(writer, (string)value); |
| } |
| else if (value is IDictionary) |
| { |
| WriteDictionary(writer, (IDictionary)value); |
| } |
| else if (value is IList) |
| { |
| WriteList(writer, (IList)value); |
| } |
| else if (value is int || value is uint) |
| { |
| IFormattable formattable = (IFormattable) value; |
| writer.Write(formattable.ToString("d", CultureInfo.InvariantCulture)); |
| } |
| else if (value is long || value is ulong) |
| { |
| writer.Write('"'); |
| IFormattable formattable = (IFormattable) value; |
| writer.Write(formattable.ToString("d", CultureInfo.InvariantCulture)); |
| writer.Write('"'); |
| } |
| else if (value is System.Enum) |
| { |
| if (settings.FormatEnumsAsIntegers) |
| { |
| WriteValue(writer, (int)value); |
| } |
| else |
| { |
| string name = OriginalEnumValueHelper.GetOriginalName(value); |
| if (name != null) |
| { |
| WriteString(writer, name); |
| } |
| else |
| { |
| WriteValue(writer, (int)value); |
| } |
| } |
| } |
| else if (value is float || value is double) |
| { |
| string text = ((IFormattable) value).ToString("r", CultureInfo.InvariantCulture); |
| if (text == "NaN" || text == "Infinity" || text == "-Infinity") |
| { |
| writer.Write('"'); |
| writer.Write(text); |
| writer.Write('"'); |
| } |
| else |
| { |
| writer.Write(text); |
| } |
| } |
| else if (value is IMessage) |
| { |
| Format((IMessage)value, writer); |
| } |
| else |
| { |
| throw new ArgumentException("Unable to format value of type " + value.GetType()); |
| } |
| } |
| |
| /// <summary> |
| /// Central interception point for well-known type formatting. Any well-known types which |
| /// don't need special handling can fall back to WriteMessage. We avoid assuming that the |
| /// values are using the embedded well-known types, in order to allow for dynamic messages |
| /// in the future. |
| /// </summary> |
| private void WriteWellKnownTypeValue(TextWriter writer, MessageDescriptor descriptor, object value) |
| { |
| // Currently, we can never actually get here, because null values are always handled by the caller. But if we *could*, |
| // this would do the right thing. |
| if (value == null) |
| { |
| WriteNull(writer); |
| return; |
| } |
| // For wrapper types, the value will either be the (possibly boxed) "native" value, |
| // or the message itself if we're formatting it at the top level (e.g. just calling ToString on the object itself). |
| // If it's the message form, we can extract the value first, which *will* be the (possibly boxed) native value, |
| // and then proceed, writing it as if we were definitely in a field. (We never need to wrap it in an extra string... |
| // WriteValue will do the right thing.) |
| if (descriptor.IsWrapperType) |
| { |
| if (value is IMessage) |
| { |
| var message = (IMessage) value; |
| value = message.Descriptor.Fields[WrappersReflection.WrapperValueFieldNumber].Accessor.GetValue(message); |
| } |
| WriteValue(writer, value); |
| return; |
| } |
| if (descriptor.FullName == Timestamp.Descriptor.FullName) |
| { |
| WriteTimestamp(writer, (IMessage)value); |
| return; |
| } |
| if (descriptor.FullName == Duration.Descriptor.FullName) |
| { |
| WriteDuration(writer, (IMessage)value); |
| return; |
| } |
| if (descriptor.FullName == FieldMask.Descriptor.FullName) |
| { |
| WriteFieldMask(writer, (IMessage)value); |
| return; |
| } |
| if (descriptor.FullName == Struct.Descriptor.FullName) |
| { |
| WriteStruct(writer, (IMessage)value); |
| return; |
| } |
| if (descriptor.FullName == ListValue.Descriptor.FullName) |
| { |
| var fieldAccessor = descriptor.Fields[ListValue.ValuesFieldNumber].Accessor; |
| WriteList(writer, (IList)fieldAccessor.GetValue((IMessage)value)); |
| return; |
| } |
| if (descriptor.FullName == Value.Descriptor.FullName) |
| { |
| WriteStructFieldValue(writer, (IMessage)value); |
| return; |
| } |
| if (descriptor.FullName == Any.Descriptor.FullName) |
| { |
| WriteAny(writer, (IMessage)value); |
| return; |
| } |
| WriteMessage(writer, (IMessage)value); |
| } |
| |
| private void WriteTimestamp(TextWriter writer, IMessage value) |
| { |
| // TODO: In the common case where this *is* using the built-in Timestamp type, we could |
| // avoid all the reflection at this point, by casting to Timestamp. In the interests of |
| // avoiding subtle bugs, don't do that until we've implemented DynamicMessage so that we can prove |
| // it still works in that case. |
| int nanos = (int) value.Descriptor.Fields[Timestamp.NanosFieldNumber].Accessor.GetValue(value); |
| long seconds = (long) value.Descriptor.Fields[Timestamp.SecondsFieldNumber].Accessor.GetValue(value); |
| writer.Write(Timestamp.ToJson(seconds, nanos, DiagnosticOnly)); |
| } |
| |
| private void WriteDuration(TextWriter writer, IMessage value) |
| { |
| // TODO: Same as for WriteTimestamp |
| int nanos = (int) value.Descriptor.Fields[Duration.NanosFieldNumber].Accessor.GetValue(value); |
| long seconds = (long) value.Descriptor.Fields[Duration.SecondsFieldNumber].Accessor.GetValue(value); |
| writer.Write(Duration.ToJson(seconds, nanos, DiagnosticOnly)); |
| } |
| |
| private void WriteFieldMask(TextWriter writer, IMessage value) |
| { |
| var paths = (IList<string>) value.Descriptor.Fields[FieldMask.PathsFieldNumber].Accessor.GetValue(value); |
| writer.Write(FieldMask.ToJson(paths, DiagnosticOnly)); |
| } |
| |
| private void WriteAny(TextWriter writer, IMessage value) |
| { |
| if (DiagnosticOnly) |
| { |
| WriteDiagnosticOnlyAny(writer, value); |
| return; |
| } |
| |
| string typeUrl = (string) value.Descriptor.Fields[Any.TypeUrlFieldNumber].Accessor.GetValue(value); |
| ByteString data = (ByteString) value.Descriptor.Fields[Any.ValueFieldNumber].Accessor.GetValue(value); |
| string typeName = Any.GetTypeName(typeUrl); |
| MessageDescriptor descriptor = settings.TypeRegistry.Find(typeName); |
| if (descriptor == null) |
| { |
| throw new InvalidOperationException($"Type registry has no descriptor for type name '{typeName}'"); |
| } |
| IMessage message = descriptor.Parser.ParseFrom(data); |
| writer.Write("{ "); |
| WriteString(writer, AnyTypeUrlField); |
| writer.Write(NameValueSeparator); |
| WriteString(writer, typeUrl); |
| |
| if (descriptor.IsWellKnownType) |
| { |
| writer.Write(PropertySeparator); |
| WriteString(writer, AnyWellKnownTypeValueField); |
| writer.Write(NameValueSeparator); |
| WriteWellKnownTypeValue(writer, descriptor, message); |
| } |
| else |
| { |
| WriteMessageFields(writer, message, true); |
| } |
| writer.Write(" }"); |
| } |
| |
| private void WriteDiagnosticOnlyAny(TextWriter writer, IMessage value) |
| { |
| string typeUrl = (string) value.Descriptor.Fields[Any.TypeUrlFieldNumber].Accessor.GetValue(value); |
| ByteString data = (ByteString) value.Descriptor.Fields[Any.ValueFieldNumber].Accessor.GetValue(value); |
| writer.Write("{ "); |
| WriteString(writer, AnyTypeUrlField); |
| writer.Write(NameValueSeparator); |
| WriteString(writer, typeUrl); |
| writer.Write(PropertySeparator); |
| WriteString(writer, AnyDiagnosticValueField); |
| writer.Write(NameValueSeparator); |
| writer.Write('"'); |
| writer.Write(data.ToBase64()); |
| writer.Write('"'); |
| writer.Write(" }"); |
| } |
| |
| private void WriteStruct(TextWriter writer, IMessage message) |
| { |
| writer.Write("{ "); |
| IDictionary fields = (IDictionary) message.Descriptor.Fields[Struct.FieldsFieldNumber].Accessor.GetValue(message); |
| bool first = true; |
| foreach (DictionaryEntry entry in fields) |
| { |
| string key = (string) entry.Key; |
| IMessage value = (IMessage) entry.Value; |
| if (string.IsNullOrEmpty(key) || value == null) |
| { |
| throw new InvalidOperationException("Struct fields cannot have an empty key or a null value."); |
| } |
| |
| if (!first) |
| { |
| writer.Write(PropertySeparator); |
| } |
| WriteString(writer, key); |
| writer.Write(NameValueSeparator); |
| WriteStructFieldValue(writer, value); |
| first = false; |
| } |
| writer.Write(first ? "}" : " }"); |
| } |
| |
| private void WriteStructFieldValue(TextWriter writer, IMessage message) |
| { |
| var specifiedField = message.Descriptor.Oneofs[0].Accessor.GetCaseFieldDescriptor(message); |
| if (specifiedField == null) |
| { |
| throw new InvalidOperationException("Value message must contain a value for the oneof."); |
| } |
| |
| object value = specifiedField.Accessor.GetValue(message); |
| |
| switch (specifiedField.FieldNumber) |
| { |
| case Value.BoolValueFieldNumber: |
| case Value.StringValueFieldNumber: |
| case Value.NumberValueFieldNumber: |
| WriteValue(writer, value); |
| return; |
| case Value.StructValueFieldNumber: |
| case Value.ListValueFieldNumber: |
| // Structs and ListValues are nested messages, and already well-known types. |
| var nestedMessage = (IMessage) specifiedField.Accessor.GetValue(message); |
| WriteWellKnownTypeValue(writer, nestedMessage.Descriptor, nestedMessage); |
| return; |
| case Value.NullValueFieldNumber: |
| WriteNull(writer); |
| return; |
| default: |
| throw new InvalidOperationException("Unexpected case in struct field: " + specifiedField.FieldNumber); |
| } |
| } |
| |
| internal void WriteList(TextWriter writer, IList list) |
| { |
| writer.Write("[ "); |
| bool first = true; |
| foreach (var value in list) |
| { |
| if (!first) |
| { |
| writer.Write(PropertySeparator); |
| } |
| WriteValue(writer, value); |
| first = false; |
| } |
| writer.Write(first ? "]" : " ]"); |
| } |
| |
| internal void WriteDictionary(TextWriter writer, IDictionary dictionary) |
| { |
| writer.Write("{ "); |
| bool first = true; |
| // This will box each pair. Could use IDictionaryEnumerator, but that's ugly in terms of disposal. |
| foreach (DictionaryEntry pair in dictionary) |
| { |
| if (!first) |
| { |
| writer.Write(PropertySeparator); |
| } |
| string keyText; |
| if (pair.Key is string) |
| { |
| keyText = (string) pair.Key; |
| } |
| else if (pair.Key is bool) |
| { |
| keyText = (bool) pair.Key ? "true" : "false"; |
| } |
| else if (pair.Key is int || pair.Key is uint | pair.Key is long || pair.Key is ulong) |
| { |
| keyText = ((IFormattable) pair.Key).ToString("d", CultureInfo.InvariantCulture); |
| } |
| else |
| { |
| if (pair.Key == null) |
| { |
| throw new ArgumentException("Dictionary has entry with null key"); |
| } |
| throw new ArgumentException("Unhandled dictionary key type: " + pair.Key.GetType()); |
| } |
| WriteString(writer, keyText); |
| writer.Write(NameValueSeparator); |
| WriteValue(writer, pair.Value); |
| first = false; |
| } |
| writer.Write(first ? "}" : " }"); |
| } |
| |
| /// <summary> |
| /// Writes a string (including leading and trailing double quotes) to a builder, escaping as required. |
| /// </summary> |
| /// <remarks> |
| /// Other than surrogate pair handling, this code is mostly taken from src/google/protobuf/util/internal/json_escaping.cc. |
| /// </remarks> |
| internal static void WriteString(TextWriter writer, string text) |
| { |
| writer.Write('"'); |
| for (int i = 0; i < text.Length; i++) |
| { |
| char c = text[i]; |
| if (c < 0xa0) |
| { |
| writer.Write(CommonRepresentations[c]); |
| continue; |
| } |
| if (char.IsHighSurrogate(c)) |
| { |
| // Encountered first part of a surrogate pair. |
| // Check that we have the whole pair, and encode both parts as hex. |
| i++; |
| if (i == text.Length || !char.IsLowSurrogate(text[i])) |
| { |
| throw new ArgumentException("String contains low surrogate not followed by high surrogate"); |
| } |
| HexEncodeUtf16CodeUnit(writer, c); |
| HexEncodeUtf16CodeUnit(writer, text[i]); |
| continue; |
| } |
| else if (char.IsLowSurrogate(c)) |
| { |
| throw new ArgumentException("String contains high surrogate not preceded by low surrogate"); |
| } |
| switch ((uint) c) |
| { |
| // These are not required by json spec |
| // but used to prevent security bugs in javascript. |
| case 0xfeff: // Zero width no-break space |
| case 0xfff9: // Interlinear annotation anchor |
| case 0xfffa: // Interlinear annotation separator |
| case 0xfffb: // Interlinear annotation terminator |
| |
| case 0x00ad: // Soft-hyphen |
| case 0x06dd: // Arabic end of ayah |
| case 0x070f: // Syriac abbreviation mark |
| case 0x17b4: // Khmer vowel inherent Aq |
| case 0x17b5: // Khmer vowel inherent Aa |
| HexEncodeUtf16CodeUnit(writer, c); |
| break; |
| |
| default: |
| if ((c >= 0x0600 && c <= 0x0603) || // Arabic signs |
| (c >= 0x200b && c <= 0x200f) || // Zero width etc. |
| (c >= 0x2028 && c <= 0x202e) || // Separators etc. |
| (c >= 0x2060 && c <= 0x2064) || // Invisible etc. |
| (c >= 0x206a && c <= 0x206f)) |
| { |
| HexEncodeUtf16CodeUnit(writer, c); |
| } |
| else |
| { |
| // No handling of surrogates here - that's done earlier |
| writer.Write(c); |
| } |
| break; |
| } |
| } |
| writer.Write('"'); |
| } |
| |
| private const string Hex = "0123456789abcdef"; |
| private static void HexEncodeUtf16CodeUnit(TextWriter writer, char c) |
| { |
| writer.Write("\\u"); |
| writer.Write(Hex[(c >> 12) & 0xf]); |
| writer.Write(Hex[(c >> 8) & 0xf]); |
| writer.Write(Hex[(c >> 4) & 0xf]); |
| writer.Write(Hex[(c >> 0) & 0xf]); |
| } |
| |
| /// <summary> |
| /// Settings controlling JSON formatting. |
| /// </summary> |
| public sealed class Settings |
| { |
| /// <summary> |
| /// Default settings, as used by <see cref="JsonFormatter.Default"/> |
| /// </summary> |
| public static Settings Default { get; } |
| |
| // Workaround for the Mono compiler complaining about XML comments not being on |
| // valid language elements. |
| static Settings() |
| { |
| Default = new Settings(false); |
| } |
| |
| /// <summary> |
| /// Whether fields which would otherwise not be included in the formatted data |
| /// should be formatted even when the value is not present, or has the default value. |
| /// This option only affects fields which don't support "presence" (e.g. |
| /// singular non-optional proto3 primitive fields). |
| /// </summary> |
| public bool FormatDefaultValues { get; } |
| |
| /// <summary> |
| /// The type registry used to format <see cref="Any"/> messages. |
| /// </summary> |
| public TypeRegistry TypeRegistry { get; } |
| |
| /// <summary> |
| /// Whether to format enums as ints. Defaults to false. |
| /// </summary> |
| public bool FormatEnumsAsIntegers { get; } |
| |
| |
| /// <summary> |
| /// Creates a new <see cref="Settings"/> object with the specified formatting of default values |
| /// and an empty type registry. |
| /// </summary> |
| /// <param name="formatDefaultValues"><c>true</c> if default values (0, empty strings etc) should be formatted; <c>false</c> otherwise.</param> |
| public Settings(bool formatDefaultValues) : this(formatDefaultValues, TypeRegistry.Empty) |
| { |
| } |
| |
| /// <summary> |
| /// Creates a new <see cref="Settings"/> object with the specified formatting of default values |
| /// and type registry. |
| /// </summary> |
| /// <param name="formatDefaultValues"><c>true</c> if default values (0, empty strings etc) should be formatted; <c>false</c> otherwise.</param> |
| /// <param name="typeRegistry">The <see cref="TypeRegistry"/> to use when formatting <see cref="Any"/> messages.</param> |
| public Settings(bool formatDefaultValues, TypeRegistry typeRegistry) : this(formatDefaultValues, typeRegistry, false) |
| { |
| } |
| |
| /// <summary> |
| /// Creates a new <see cref="Settings"/> object with the specified parameters. |
| /// </summary> |
| /// <param name="formatDefaultValues"><c>true</c> if default values (0, empty strings etc) should be formatted; <c>false</c> otherwise.</param> |
| /// <param name="typeRegistry">The <see cref="TypeRegistry"/> to use when formatting <see cref="Any"/> messages. TypeRegistry.Empty will be used if it is null.</param> |
| /// <param name="formatEnumsAsIntegers"><c>true</c> to format the enums as integers; <c>false</c> to format enums as enum names.</param> |
| private Settings(bool formatDefaultValues, |
| TypeRegistry typeRegistry, |
| bool formatEnumsAsIntegers) |
| { |
| FormatDefaultValues = formatDefaultValues; |
| TypeRegistry = typeRegistry ?? TypeRegistry.Empty; |
| FormatEnumsAsIntegers = formatEnumsAsIntegers; |
| } |
| |
| /// <summary> |
| /// Creates a new <see cref="Settings"/> object with the specified formatting of default values and the current settings. |
| /// </summary> |
| /// <param name="formatDefaultValues"><c>true</c> if default values (0, empty strings etc) should be formatted; <c>false</c> otherwise.</param> |
| public Settings WithFormatDefaultValues(bool formatDefaultValues) => new Settings(formatDefaultValues, TypeRegistry, FormatEnumsAsIntegers); |
| |
| /// <summary> |
| /// Creates a new <see cref="Settings"/> object with the specified type registry and the current settings. |
| /// </summary> |
| /// <param name="typeRegistry">The <see cref="TypeRegistry"/> to use when formatting <see cref="Any"/> messages.</param> |
| public Settings WithTypeRegistry(TypeRegistry typeRegistry) => new Settings(FormatDefaultValues, typeRegistry, FormatEnumsAsIntegers); |
| |
| /// <summary> |
| /// Creates a new <see cref="Settings"/> object with the specified enums formatting option and the current settings. |
| /// </summary> |
| /// <param name="formatEnumsAsIntegers"><c>true</c> to format the enums as integers; <c>false</c> to format enums as enum names.</param> |
| public Settings WithFormatEnumsAsIntegers(bool formatEnumsAsIntegers) => new Settings(FormatDefaultValues, TypeRegistry, formatEnumsAsIntegers); |
| } |
| |
| // Effectively a cache of mapping from enum values to the original name as specified in the proto file, |
| // fetched by reflection. |
| // The need for this is unfortunate, as is its unbounded size, but realistically it shouldn't cause issues. |
| private static class OriginalEnumValueHelper |
| { |
| // TODO: In the future we might want to use ConcurrentDictionary, at the point where all |
| // the platforms we target have it. |
| private static readonly Dictionary<System.Type, Dictionary<object, string>> dictionaries |
| = new Dictionary<System.Type, Dictionary<object, string>>(); |
| |
| internal static string GetOriginalName(object value) |
| { |
| var enumType = value.GetType(); |
| Dictionary<object, string> nameMapping; |
| lock (dictionaries) |
| { |
| if (!dictionaries.TryGetValue(enumType, out nameMapping)) |
| { |
| nameMapping = GetNameMapping(enumType); |
| dictionaries[enumType] = nameMapping; |
| } |
| } |
| |
| string originalName; |
| // If this returns false, originalName will be null, which is what we want. |
| nameMapping.TryGetValue(value, out originalName); |
| return originalName; |
| } |
| |
| #if NET35 |
| // TODO: Consider adding functionality to TypeExtensions to avoid this difference. |
| private static Dictionary<object, string> GetNameMapping(System.Type enumType) => |
| enumType.GetFields(BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Static) |
| .Where(f => (f.GetCustomAttributes(typeof(OriginalNameAttribute), false) |
| .FirstOrDefault() as OriginalNameAttribute) |
| ?.PreferredAlias ?? true) |
| .ToDictionary(f => f.GetValue(null), |
| f => (f.GetCustomAttributes(typeof(OriginalNameAttribute), false) |
| .FirstOrDefault() as OriginalNameAttribute) |
| // If the attribute hasn't been applied, fall back to the name of the field. |
| ?.Name ?? f.Name); |
| #else |
| private static Dictionary<object, string> GetNameMapping(System.Type enumType) => |
| enumType.GetTypeInfo().DeclaredFields |
| .Where(f => f.IsStatic) |
| .Where(f => f.GetCustomAttributes<OriginalNameAttribute>() |
| .FirstOrDefault()?.PreferredAlias ?? true) |
| .ToDictionary(f => f.GetValue(null), |
| f => f.GetCustomAttributes<OriginalNameAttribute>() |
| .FirstOrDefault() |
| // If the attribute hasn't been applied, fall back to the name of the field. |
| ?.Name ?? f.Name); |
| #endif |
| } |
| } |
| } |
