郎速科技
116 lines
4.7 KiB
C#
116 lines
4.7 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using Newtonsoft.Json;
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using Newtonsoft.Json.Linq;
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namespace Lskj.AgentBridge
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{
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public static class BridgeRequestParser
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{
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private static readonly ISet<string> AllowedProperties =
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new HashSet<string>(new[]
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{
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"protocolVersion",
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"requestId",
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"correlationId",
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"clientSessionId",
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"sessionScopeToken",
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"method",
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"payload",
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"uatGrant"
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}, StringComparer.Ordinal);
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public static BridgeRequest Parse(string json)
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{
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if (string.IsNullOrWhiteSpace(json))
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throw new JsonSerializationException("桥请求 JSON 不能为空。");
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JObject root;
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using (StringReader text = new StringReader(json))
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using (StrictJsonTextReader reader = new StrictJsonTextReader(text))
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{
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root = JObject.Load(reader, new JsonLoadSettings
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{
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CommentHandling = CommentHandling.Ignore,
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LineInfoHandling = LineInfoHandling.Ignore,
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DuplicatePropertyNameHandling = DuplicatePropertyNameHandling.Error
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});
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if (reader.Read())
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throw new JsonSerializationException("桥请求包含多个 JSON 根值。");
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}
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foreach (JProperty property in root.Properties())
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{
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if (!AllowedProperties.Contains(property.Name))
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throw new JsonSerializationException(
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"桥请求包含未知字段：" + property.Name);
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}
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RequireStringWhenPresent(root, "protocolVersion");
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RequireStringWhenPresent(root, "requestId");
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RequireStringWhenPresent(root, "correlationId");
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RequireStringWhenPresent(root, "clientSessionId");
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RequireStringWhenPresent(root, "sessionScopeToken");
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RequireStringWhenPresent(root, "method");
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JToken payload = root["payload"];
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if (payload != null && payload.Type != JTokenType.Object)
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throw new JsonSerializationException("桥请求 payload 必须是 JSON 对象。");
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JToken uatGrant = root["uatGrant"];
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if (uatGrant != null)
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{
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JObject grant = uatGrant as JObject;
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if (grant == null)
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throw new JsonSerializationException(
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"桥请求 uatGrant 必须是 JSON 对象。");
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ISet<string> grantFields = new HashSet<string>(
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new[] { "authorizationId", "caseCode", "token" },
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StringComparer.Ordinal);
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foreach (JProperty property in grant.Properties())
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{
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if (!grantFields.Contains(property.Name))
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throw new JsonSerializationException(
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"桥请求 uatGrant 包含未知字段："
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+ property.Name);
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}
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if (grant.Properties().Count() != 3)
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throw new JsonSerializationException(
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"桥请求 uatGrant 必须完整包含三个字段。");
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RequireStringWhenPresent(grant, "authorizationId");
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RequireStringWhenPresent(grant, "caseCode");
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RequireStringWhenPresent(grant, "token");
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}
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BridgeRequest request = root.ToObject<BridgeRequest>();
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if (request == null)
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throw new JsonSerializationException("桥请求无法反序列化。");
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return request;
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}
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private static void RequireStringWhenPresent(JObject root, string name)
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{
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JToken value = root[name];
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if (value != null && value.Type != JTokenType.String)
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throw new JsonSerializationException(
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"桥请求字段必须是字符串：" + name);
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}
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private sealed class StrictJsonTextReader : JsonTextReader
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{
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public StrictJsonTextReader(TextReader reader)
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: base(reader)
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{
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DateParseHandling = DateParseHandling.None;
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FloatParseHandling = FloatParseHandling.Decimal;
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MaxDepth = 64;
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SupportMultipleContent = false;
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}
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public override bool Read()
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{
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bool available = base.Read();
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if (available && TokenType == JsonToken.Comment)
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throw new JsonReaderException("桥请求不允许 JSON 注释。");
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return available;
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}
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}
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}
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}
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