描述bug

当输入消息中存在带有重音符号的字符(如á)时，AWS Bedrock聊天模型会返回验证异常。

result = {ValidationException@22166} Method threw 'software.amazon.awssdk.services.bedrockruntime.model.ValidationException' exception.
 stackTrace = {StackTraceElement[49]@22173} 
  0 = {StackTraceElement@22182} "software.amazon.awssdk.core.internal.http.CombinedResponseHandler.handleErrorResponse(CombinedResponseHandler.java:125)"
  1 = {StackTraceElement@22183} "software.amazon.awssdk.core.internal.http.CombinedResponseHandler.handleResponse(CombinedResponseHandler.java:82)"
  2 = {StackTraceElement@22184} "software.amazon.awssdk.core.internal.http.CombinedResponseHandler.handle(CombinedResponseHandler.java:60)"
  3 = {StackTraceElement@22185} "software.amazon.awssdk.core.internal.http.CombinedResponseHandler.handle(CombinedResponseHandler.java:41)"
  4 = {StackTraceElement@22186} "software.amazon.awssdk.core.internal.http.pipeline.stages.HandleResponseStage.execute(HandleResponseStage.java:50)"
  5 = {StackTraceElement@22187} "software.amazon.awssdk.core.internal.http.pipeline.stages.HandleResponseStage.execute(HandleResponseStage.java:38)"
  6 = {StackTraceElement@22188} "software.amazon.awssdk.core.internal.http.pipeline.RequestPipelineBuilder$ComposingRequestPipelineStage.execute(RequestPipelineBuilder.java:206)"
  7 = {StackTraceElement@22189} "software.amazon.awssdk.core.internal.http.pipeline.stages.ApiCallAttemptTimeoutTrackingStage.execute(ApiCallAttemptTimeoutTrackingStage.java:72)"
  8 = {StackTraceElement@22190} "software.amazon.awssdk.core.internal.http.pipeline.stages.ApiCallAttemptTimeoutTrackingStage.execute(ApiCallAttemptTimeoutTrackingStage.java:42)"
  9 = {StackTraceElement@22191} "software.amazon.awssdk.core.internal.http.pipeline.stages.TimeoutExceptionHandlingStage.execute(TimeoutExceptionHandlingStage.java:78)"
  10 = {StackTraceElement@22192} "software.amazon.awssdk.core.internal.http.pipeline.stages.TimeoutExceptionHandlingStage.execute(TimeoutExceptionHandlingStage.java:40)"
  11 = {StackTraceElement@22193} "software.amazon.awssdk.core.internal.http.pipeline.stages.ApiCallAttemptMetricCollectionStage.execute(ApiCallAttemptMetricCollectionStage.java:55)"
  12 = {StackTraceElement@22194} "software.amazon.awssdk.core.internal.http.pipeline.stages.ApiCallAttemptMetricCollectionStage.execute(ApiCallAttemptMetricCollectionStage.java:39)"
  13 = {StackTraceElement@22195} "software.amazon.awssdk.core.internal.http.pipeline.stages.RetryableStage.execute(RetryableStage.java:81)"
  14 = {StackTraceElement@22196} "software.amazon.awssdk.core.internal.http.pipeline.stages.RetryableStage.execute(RetryableStage.java:36)"
  15 = {StackTraceElement@22197} "software.amazon.awssdk.core.internal.http.pipeline.RequestPipelineBuilder$ComposingRequestPipelineStage.execute(RequestPipelineBuilder.java:206)"
  16 = {StackTraceElement@22198} "software.amazon.awssdk.core.internal.http.StreamManagingStage.execute(StreamManagingStage.java:56)"
  17 = {StackTraceElement@22199} "software.amazon.awssdk.core.internal.http.StreamManagingStage.execute(StreamManagingStage.java:36)"
  18 = {StackTraceElement@22200} "software.amazon.awssdk.core.internal.http.pipeline.stages.ApiCallTimeoutTrackingStage.executeWithTimer(ApiCallTimeoutTrackingStage.java:80)"
  19 = {StackTraceElement@22201} "software.amazon.awssdk.core.internal.http.pipeline.stages.ApiCallTimeoutTrackingStage.execute(ApiCallTimeoutTrackingStage.java:60)"
  20 = {StackTraceElement@22202} "software.amazon.awssdk.core.internal.http.pipeline.stages.ApiCallTimeoutTrackingStage.execute(ApiCallTimeoutTrackingStage.java:42)"
  21 = {StackTraceElement@22203} "software.amazon.awssdk.core.internal.http.pipeline.stages.ApiCallMetricCollectionStage.execute(ApiCallMetricCollectionStage.java:50)"
  22 = {StackTraceElement@22204} "software.amazon.awssdk.core.internal.http.pipeline.stages.ApiCallMetricCollectionStage.execute(ApiCallMetricCollectionStage.java:32)"
  23 = {StackTraceElement@22205} "software.amazon.awssdk.core.internal.http.pipeline.RequestPipelineBuilder$ComposingRequestPipelineStage.execute(RequestPipelineBuilder.java:206)"
  24 = {StackTraceElement@22206} "software.amazon.awssdk.core.internal.http.pipeline.RequestPipelineBuilder$ComposingRequestPipelineStage.execute(RequestPipelineBuilder.java:206)"
  25 = {StackTraceElement@22207} "software.amazon.awssdk.core.internal.http.pipeline.stages.ExecutionFailureExceptionReportingStage.execute(ExecutionFailureExceptionReportingStage.java:37)"
  26 = {StackTraceElement@22208} "software.amazon.awssdk.core.internal.http.pipeline.stages.ExecutionFailureExceptionReportingStage.execute(ExecutionFailureExceptionReportingStage.java:26)"
  27 = {StackTraceElement@22209} "software.amazon.awssdk.core.internal.http.AmazonSyncHttpClient$RequestExecutionBuilderImpl.execute(AmazonSyncHttpClient.java:224)"
  28 = {StackTraceElement@22210} "software.amazon.awssdk.core.internal.handler.BaseSyncClientHandler.invoke(BaseSyncClientHandler.java:103)"
  29 = {StackTraceElement@22211} "software.amazon.awssdk.core.internal.handler.BaseSyncClientHandler.doExecute(BaseSyncClientHandler.java:173)"
  30 = {StackTraceElement@22212} "software.amazon.awssdk.core.internal.handler.BaseSyncClientHandler.lambda$execute$1(BaseSyncClientHandler.java:80)"
  31 = {StackTraceElement@22213} "software.amazon.awssdk.core.internal.handler.BaseSyncClientHandler.measureApiCallSuccess(BaseSyncClientHandler.java:182)"
  32 = {StackTraceElement@22214} "software.amazon.awssdk.core.internal.handler.BaseSyncClientHandler.execute(BaseSyncClientHandler.java:74)"
  33 = {StackTraceElement@22215} "software.amazon.awssdk.core.client.handler.SdkSyncClientHandler.execute(SdkSyncClientHandler.java:45)"
  34 = {StackTraceElement@22216} "software.amazon.awssdk.awscore.client.handler.AwsSyncClientHandler.execute(AwsSyncClientHandler.java:53)"
  35 = {StackTraceElement@22217} "software.amazon.awssdk.services.bedrockruntime.DefaultBedrockRuntimeClient.invokeModel(DefaultBedrockRuntimeClient.java:149)"
  36 = {StackTraceElement@22218} "dev.langchain4j.model.bedrock.internal.AbstractBedrockChatModel.invoke(AbstractBedrockChatModel.java:141)"
  37 = {StackTraceElement@22219} "dev.langchain4j.model.bedrock.BedrockAnthropicMessageChatModel.lambda$generate$0(BedrockAnthropicMessageChatModel.java:69)"
  38 = {StackTraceElement@22220} "dev.langchain4j.internal.RetryUtils$RetryPolicy.withRetry(RetryUtils.java:192)"
  39 = {StackTraceElement@22221} "dev.langchain4j.internal.RetryUtils.withRetry(RetryUtils.java:229)"
  40 = {StackTraceElement@22222} "dev.langchain4j.model.bedrock.BedrockAnthropicMessageChatModel.generate(BedrockAnthropicMessageChatModel.java:69)"
 awsErrorDetails = {AwsErrorDetails@22169} "AwsErrorDetails(errorMessage=Malformed input request, please reformat your input and try again., errorCode=ValidationException, serviceName=BedrockRuntime)"
 clockSkew = {Duration@21122} "PT0S"
 requestId = "4c40820b-8c19-4e90-97ee-225f8642398e"
 extendedRequestId = null
 statusCode = 400
 backtrace = {Object[5]@22171} 
 detailMessage = "Malformed input request, please reformat your input and try again."
 cause = null
 depth = 49
 suppressedExceptions = {Collections$EmptyList@21127}  size = 0

复现方法

要复现此问题，请使用非ASCII字符(如claude 3)与AWS Bedrock聊天模型一起使用。它需要调用AbstractBedrockChatModel.java的generate函数。

预期行为

无论字符串中包含什么字符，都应该正常工作。

根本原因和修复

问题的根本原因是我们在AbstractBedrockChatModel.java的invoke函数中使用了请求的默认字符集。为了解决这个问题，我们需要将"Charset.defaultCharset()"更改为"StandardCharsets.UTF_8"。

请填写以下信息：

• LangChain4j版本：0.29
• 使用的LLM(s):Bedrock Claude 3
• Java版本：11