Google Document AI c# mime 不支持的输入文件格式答案

【问题标题】：Google Document AI c# mime Unsupported input file formatGoogle Document AI c# mime 不支持的输入文件格式
【发布时间】：2021-07-29 18:30:31
【问题描述】：

我正在尝试将要处理的 pdf 上传到 google 的 Document AI 服务。使用谷歌的“C#”使用 Google.Cloud.DocumentAI.V1。看了github和docs，信息不多。 PDF 位于本地驱动器上。我将pdf转换为字节数组，然后将其转换为Bystring。然后将请求 mime 设置为“application/pdf”，但它返回的错误是：

Status(StatusCode="InvalidArgument", Detail="Unsupported input file format.", DebugException="Grpc.Core.Internal.CoreErrorDetailException: {"created":"@1627582435.256000000","description":"错误来自peer ipv4:142.250.72.170:443","file":"......\src\core\lib\surface\call.cc","file_line":1067,"grpc_message":"不支持的输入文件格式.","grpc_status":3}")

代码：

try
{
    //Generate a document
    string pdfFilePath = "C:\\Users\\maponte\\Documents\\Projects\\SettonProjects\\OCRSTUFF\\DOC071621-0016.pdf";
    var bytes = Encoding.UTF8.GetBytes(pdfFilePath);


    ByteString content = ByteString.CopyFrom(bytes);

    // Create client
    DocumentProcessorServiceClient documentProcessorServiceClient = await DocumentProcessorServiceClient.CreateAsync();
    // Initialize request argument(s)
    ProcessRequest request = new ProcessRequest
    {
        ProcessorName = ProcessorName.FromProjectLocationProcessor("*****", "mycountry", "***"),
        SkipHumanReview = false,
        InlineDocument = new Document(),
        RawDocument = new RawDocument(),
    };
    
    request.RawDocument.MimeType = "application/pdf";
    request.RawDocument.Content = content;

    // Make the request
    ProcessResponse response = await documentProcessorServiceClient.ProcessDocumentAsync(request);

    Document docResponse = response.Document;

    Console.WriteLine(docResponse.Text);
   
}
catch(Exception ex)
{
    Console.WriteLine(ex.Message);
}

【问题讨论】：

标签： c# artificial-intelligence cloud-document-ai

【解决方案1】：

这是问题所在（或至少是一个问题）——您实际上并没有加载文件：

string pdfFilePath = "C:\\Users\\maponte\\Documents\\Projects\\SettonProjects\\OCRSTUFF\\DOC071621-0016.pdf";
var bytes = Encoding.UTF8.GetBytes(pdfFilePath);

ByteString content = ByteString.CopyFrom(bytes);

你想要：

string pdfFilePath = "path-as-before";
var bytes = File.ReadAllBytes(pdfFilePath);
ByteString content = ByteString.CopyFrom(bytes);

不过，我还要注意，InlineDocument 和 RawDocument 是彼此的替代品 - 指定其中一个会删除另一个。您的请求创建最好写成：

ProcessRequest request = new ProcessRequest
{
    ProcessorName = ProcessorName.FromProjectLocationProcessor("*****", "mycountry", "***"),
    SkipHumanReview = false,
    RawDocument = new RawDocument
    {
        MimeType = "application/pdf",
        Content = content
    }
};

【讨论】：