Question

从Azure函数（Blob触发器）中调用Azure Forms Recognizer .NET SDK时出现错误（BadRequest）

我基本上是在文档中C＃快速入门中使用示例代码。我已经训练了模型，并且可以使用.URL从.NET Core命令行应用程序成功调用Form Recognizer。我现在想触发相同的流程，但是当PDF上传到Azure存储Blob时。在函数中使用相同的modelId，订阅和端点时，调用AnalyzeWithCustomModelAsync（）时出现BadRequest错误。我在myBlob Stream上尝试了许多变体，创建了FileStream，MemoryStream，并使用传递给Function的uri创建了新的Stream等。

[FunctionName("ImportInvoice")]
        public static async System.Threading.Tasks.Task RunAsync([BlobTrigger("originals/{name}", Connection = "invoiceConn")]Stream myBlob, string name, Uri uri, string blobTrigger, ILogger log)
        {
            log.LogInformation($"ImportInvoice Function triggered by new invoice: {name} size: {myBlob.Length} Bytes");
            log.LogInformation($"Invoice Uri: {uri.AbsoluteUri}");
            log.LogInformation($"System.IO.Stream.CanRead is: {myBlob.CanRead}");

            try
            {
                IFormRecognizerClient formClient = new FormRecognizerClient(new ApiKeyServiceClientCredentials(subscriptionKey))
                {
                    Endpoint = formRecognizerEndpoint
                };

                using (Stream invoiceStream = myBlob)
                {
                    log.LogInformation($"About to analyse with custom model {modelId}");

                    // Fails here with BadRequest
                    AnalyzeResult result = await formClient.AnalyzeWithCustomModelAsync(modelId, myBlob, contentType: "application/pdf");

                    log.LogInformation("Invoice analysed");

                    foreach (var page in result.Pages)
                    {
                        foreach (var kv in page.KeyValuePairs)
                        {
                            if (kv.Key.Count > 0 && kv.Value.Count > 0)
                                log.LogInformation(kv.Key[0].Text + ": " + kv.Value[0].Text);
                        }
                    }
                }
            }
            catch (ErrorResponseException e)
            {
                log.LogInformation("Analyze PDF form : " + e.Message);
            }
            catch (Exception ex)
            {
                log.LogInformation("Analyze PDF form : " + ex.Message);
            }
        }

我正在传递modelId，将Stream传递给函数（myBlob）和正确的内容类型（application / pdf）。我希望formClient.AnalyzeWithCustomModelAsync（modelId，myBlob，contentType：“ application / pdf”）调用能够成功并查看键和值（同一代码在函数外部起作用），但我得到以下信息：

Executing 'ImportInvoice' (Reason='New blob detected: originals/NewCareInvoice5.pdf', Id=63f26c79-f269-4ea8-b6e8-8b4f6d6eb6e2)
ImportInvoice Function triggered by new invoice: NewCareInvoice5.pdf size: 134507 Bytes
Invoice Uri: https://myinvoices.blob.core.windows.net/originals/NewCareInvoice5.pdf
System.IO.Stream.CanRead is: True
About to analyse with custom model <correct model id shown here>
Analyze PDF form : Operation returned an invalid status code 'BadRequest'

我假设问题出在Stream上，但是我转了一圈试图引用它，或者创建或复制一个新的Stream，似乎丢失了一些东西。我无法获得有关该错误的更多详细信息（例如，来自InnerException）。

任何帮助，不胜感激！

Answer 1

Microsoft已将表单识别更新为V2.0预览，带有更新的API和教程，请尝试使用新版本。 http://aka.ms/formrecognizer

Answer 2

这是Form Recognizer SDK上的错误。我希望它能尽快修复。

https://github.com/MicrosoftDocs/azure-docs/issues/40938

从Azure Blob触发函数中调用Azure Forms Recognizer出错

2 个答案: