74 lines
2.8 KiB
C#
74 lines
2.8 KiB
C#
namespace System.Web.Mvc {
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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using System.Web.Script.Serialization;
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public sealed class JsonValueProviderFactory : ValueProviderFactory {
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private static void AddToBackingStore(Dictionary<string, object> backingStore, string prefix, object value) {
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IDictionary<string, object> d = value as IDictionary<string, object>;
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if (d != null) {
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foreach (KeyValuePair<string, object> entry in d) {
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AddToBackingStore(backingStore, MakePropertyKey(prefix, entry.Key), entry.Value);
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}
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return;
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}
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IList l = value as IList;
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if (l != null) {
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for (int i = 0; i < l.Count; i++) {
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AddToBackingStore(backingStore, MakeArrayKey(prefix, i), l[i]);
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}
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return;
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}
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// primitive
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backingStore[prefix] = value;
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}
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private static object GetDeserializedObject(ControllerContext controllerContext) {
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if (!controllerContext.HttpContext.Request.ContentType.StartsWith("application/json", StringComparison.OrdinalIgnoreCase)) {
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// not JSON request
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return null;
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}
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StreamReader reader = new StreamReader(controllerContext.HttpContext.Request.InputStream);
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string bodyText = reader.ReadToEnd();
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if (String.IsNullOrEmpty(bodyText)) {
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// no JSON data
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return null;
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}
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JavaScriptSerializer serializer = new JavaScriptSerializer();
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object jsonData = serializer.DeserializeObject(bodyText);
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return jsonData;
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}
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public override IValueProvider GetValueProvider(ControllerContext controllerContext) {
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if (controllerContext == null) {
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throw new ArgumentNullException("controllerContext");
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}
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object jsonData = GetDeserializedObject(controllerContext);
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if (jsonData == null) {
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return null;
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}
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Dictionary<string, object> backingStore = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase);
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AddToBackingStore(backingStore, String.Empty, jsonData);
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return new DictionaryValueProvider<object>(backingStore, CultureInfo.CurrentCulture);
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}
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private static string MakeArrayKey(string prefix, int index) {
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return prefix + "[" + index.ToString(CultureInfo.InvariantCulture) + "]";
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}
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private static string MakePropertyKey(string prefix, string propertyName) {
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return (String.IsNullOrEmpty(prefix)) ? propertyName : prefix + "." + propertyName;
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}
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}
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}
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