【发布时间】：2022-08-11 20:12:14
【问题描述】：
我正在寻找在 C# 中构建一些 lambdas 来满足来自 Cognito 的某些事件。
我没有事件有效负载的类，所以我想我会创建一个通用接口并从那里工作。
因此，我将 lambda 的入口点定义为
using Amazon.Lambda.Core;
using Newtonsoft.Json.Linq;
// Assembly attribute to enable the Lambda function\'s JSON input to be converted into a .NET class.
[assembly: LambdaSerializer(typeof(Amazon.Lambda.Serialization.SystemTextJson.DefaultLambdaJsonSerializer))]
namespace FCKM_PostAuth_01;
public class Function
{
public string FunctionHandler(JObject request, ILambdaContext context)
{
// LambdaLogger.Log($\"JObject: {request.ToString()}\");
return \"OK\";
}
}
不幸的是，这在执行时失败（通过 AWS 测试工具），如下所示
System.Exception: Error deserializing the input JSON to type JObject
at Amazon.Lambda.TestTool.Runtime.LambdaExecutor.BuildParameters(ExecutionRequest request, ILambdaContext context) in C:\\codebuild\\tmp\\output\\src868358059\\src\\Tools\\LambdaTestTool\\src\\Amazon.Lambda.TestTool\\Runtime\\LambdaExecutor.cs:line 215
at Amazon.Lambda.TestTool.Runtime.LambdaExecutor.ExecuteAsync(ExecutionRequest request) in C:\\codebuild\\tmp\\output\\src868358059\\src\\Tools\\LambdaTestTool\\src\\Amazon.Lambda.TestTool\\Runtime\\LambdaExecutor.cs:line 52
---------------- Inner 1 Exception ------------
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
at System.RuntimeMethodHandle.InvokeMethod(Object target, Span`1& arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at Amazon.Lambda.TestTool.Runtime.LambdaExecutor.BuildParameters(ExecutionRequest request, ILambdaContext context) in C:\\codebuild\\tmp\\output\\src868358059\\src\\Tools\\LambdaTestTool\\src\\Amazon.Lambda.TestTool\\Runtime\\LambdaExecutor.cs:line 203
---------------- Inner 2 Exception ------------
Amazon.Lambda.Serialization.SystemTextJson.JsonSerializerException: Error converting the Lambda event JSON payload to type Newtonsoft.Json.Linq.JObject: The JSON value could not be converted to Newtonsoft.Json.Linq.JToken. Path: $.version | LineNumber: 1 | BytePositionInLine: 14.
at Amazon.Lambda.Serialization.SystemTextJson.AbstractLambdaJsonSerializer.Deserialize[T](Stream requestStream)
---------------- Inner 3 Exception ------------
System.Text.Json.JsonException: The JSON value could not be converted to Newtonsoft.Json.Linq.JToken. Path: $.version | LineNumber: 1 | BytePositionInLine: 14.
at System.Text.Json.ThrowHelper.ThrowJsonException_DeserializeUnableToConvertValue(Type propertyType)
at System.Text.Json.Serialization.JsonCollectionConverter`2.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, TCollection& value)
at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
at System.Text.Json.Serialization.JsonDictionaryConverter`3.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, TDictionary& value)
at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 utf8Json, JsonTypeInfo jsonTypeInfo, Nullable`1 actualByteCount)
at System.Text.Json.JsonSerializer.Deserialize[TValue](ReadOnlySpan`1 utf8Json, JsonSerializerOptions options)
at Amazon.Lambda.Serialization.SystemTextJson.DefaultLambdaJsonSerializer.InternalDeserialize[T](Byte[] utf8Json)
at Amazon.Lambda.Serialization.SystemTextJson.AbstractLambdaJsonSerializer.Deserialize[T](Stream requestStream)
标签： c# aws-lambda