使用 CloudBlockBlob 作为输入触发器时缺少元数据
Missing metadata with CloudBlockBlob as input trigger
在 Blob 存储 (Data Lake Gen2) 上的事件网格触发器上使用 Azure 函数 3.0 (dotnet)。出于某种原因,我没有在“inputBlob”(CloudBlockBlob 类型)中获取与 blob 关联的元数据。知道为什么没有填充元数据吗? (我可以在 Azure 门户中看到 blob 的元数据)
[FunctionName("Processor")]
public static async Task RunAsync([EventGridTrigger]EventGridEvent eventGridEvent,
[Blob("{data.url}", FileAccess.Read, Connection = "StorageConnectionString")] CloudBlockBlob inputBlob,
ILogger log)
{
if (inputBlob != null)
{
int metaCount = inputBlob.Metadata.Count; // its zero
using System;
using System.IO;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using Microsoft.Azure.Storage.Blob;
using Azure.Storage.Blobs;
namespace FunctionApp39
{
public static class Function1
{
[FunctionName("Function1")]
public static void Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)] HttpRequest req,
[Blob("test1/1119.png", FileAccess.Read, Connection = "str")] CloudBlockBlob myBlob,
ILogger log)
{
myBlob.FetchAttributes(); //Need to fetch.
var s = myBlob.Metadata;
foreach (var metadataItem in s)
{
log.LogInformation($"\tKey: {metadataItem.Key}");
log.LogInformation($"\tValue: {metadataItem.Value}");
}
int a = myBlob.Metadata.Count;
log.LogInformation("!!!!!!!!!!!!!!!!" + a);
}
}
}
这是文档:
If you find that property or metadata values for a storage resource
have not been populated, then check that your code calls the
FetchAttributes or FetchAttributesAsync method.
在 Blob 存储 (Data Lake Gen2) 上的事件网格触发器上使用 Azure 函数 3.0 (dotnet)。出于某种原因,我没有在“inputBlob”(CloudBlockBlob 类型)中获取与 blob 关联的元数据。知道为什么没有填充元数据吗? (我可以在 Azure 门户中看到 blob 的元数据)
[FunctionName("Processor")]
public static async Task RunAsync([EventGridTrigger]EventGridEvent eventGridEvent,
[Blob("{data.url}", FileAccess.Read, Connection = "StorageConnectionString")] CloudBlockBlob inputBlob,
ILogger log)
{
if (inputBlob != null)
{
int metaCount = inputBlob.Metadata.Count; // its zero
using System;
using System.IO;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using Microsoft.Azure.Storage.Blob;
using Azure.Storage.Blobs;
namespace FunctionApp39
{
public static class Function1
{
[FunctionName("Function1")]
public static void Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)] HttpRequest req,
[Blob("test1/1119.png", FileAccess.Read, Connection = "str")] CloudBlockBlob myBlob,
ILogger log)
{
myBlob.FetchAttributes(); //Need to fetch.
var s = myBlob.Metadata;
foreach (var metadataItem in s)
{
log.LogInformation($"\tKey: {metadataItem.Key}");
log.LogInformation($"\tValue: {metadataItem.Value}");
}
int a = myBlob.Metadata.Count;
log.LogInformation("!!!!!!!!!!!!!!!!" + a);
}
}
}
这是文档:
If you find that property or metadata values for a storage resource have not been populated, then check that your code calls the FetchAttributes or FetchAttributesAsync method.