c# - Azure.RequestFailedException : 'Service request failed. 状态 : 404 (The specified blob does not exist. )错误代码:BlobNotFound

Question

亲爱的开发者您好，

我面临的问题是无法读取/访问我的 Azure 存储帐户上的 blob 文件。我使用 C# 作为编程语言。最后，我想读取我的 blob 文件来搜索特定值并检查其是否为真。预先感谢您<3

这就是我的代码的样子。

            //Get a reference to the edc(1.3) container
            string containerName = "edc/rchexport/rch-bu-party-dd/1.3";
            string connectionString = "DefaultEndpointsProtocol=https;AccountName=adlse3.....";
        
        Log.Information($"C# Timer trigger function executed at: {DateTime.Now}");
        BlobContainerClient blobContainerClient = new BlobContainerClient(connectionString, containerName);
        

        //Acces to parquet blob file. Getting the sample structure of the blob to create the final table. 
        string edcRchBuParty = "rchtestdata.parquet";
        BlobClient st5BobClient = blobContainerClient.GetBlobClient(edcRchBuParty);
        var sampleStream = st5BobClient.OpenRead();   **<<<<<<<<< This where the error pops up**.
        var sampleReader = new ParquetReader(sampleStream);

        Table sampleTable = sampleReader.ReadAsTable();
        DataField[] datafields = sampleTable.Schema.GetDataFields();
        Table finalTable = new Table(datafields);
        //looping through the container for getting the blobs and read the file and add the rows to the final table 
        await foreach (BlobItem blobItem in blobContainerClient.GetBlobsAsync())
        {
            if (blobItem.Name.Contains("15b0251556c74fd693ca1f3cb4ce4d6e")) //for testing
            {
                Log.Information("\t" + blobItem.Name);
                BlobClient blobClient = blobContainerClient.GetBlobClient(blobItem.Name);
                var stream = blobClient.OpenRead();  
                var reader = new ParquetReader(stream);
                Table table = reader.ReadAsTable();
                Console.WriteLine("Step 3 : Check");
                foreach (Row row in table)
                {
                    finalTable.Add(row);
                }
                Log.Information(finalTable.Count.ToString());
            }

Answer 1

问题在于您如何指定容器名称。

查看您的代码，我猜测您的容器名称是 edc 并且您的 blob (rchtestdata.parquet) 存在于像 rchexport/这样的文件夹层次结构中rch-bu-party-dd/1.3。

如果是这种情况，请更改以下代码行:

string containerName = "edc/rchexport/rch-bu-party-dd/1.3";

至

string containerName = "edc";

并更改以下代码行:

string edcRchBuParty = "rchtestdata.parquet";

至

string edcRchBuParty = "rchexport/rch-bu-party-dd/1.3/rchtestdata.parquet";

那么您不应该收到此错误。