Azurite doesn't support Create Blob with blob name that is empty string

[zzhxiaofeng]

Error Description: In Azure, it will create blob successfully when create blob with blob name that is empty string. But in Azurite, it will return an error as following in this case:

To Reproduce Please run the demo code as following:

import {
 BlobServiceClient
} from "@azure/storage-blob";

async function main(){
  const blobServiceClient = await BlobServiceClient.fromConnectionString("<Azurite-https-connectionString>");
  const containerClient=await blobServiceClient.getContainerClient("<container-name>");
  const appendBlobClient = await containerClient.getAppendBlobClient("<blob-name>");
}

main();

Error Track:

1. When send request, Azurite will construct a pattern by request to match the corresponding handler method. it will construct a pattern(/container) without blob when use a blob name of empty string to create blob https://github.com/Azure/Azurite/blob/master/src/blob/middlewares/blobStorageContext.middleware.ts#L80

2. When use the pattern to match handler method, it doesn't match the blob create handler method because the blob create handler method need a pattern like "container/blob". https://github.com/Azure/Azurite/blob/master/src/blob/generated/middleware/dispatch.middleware.ts#L105 https://github.com/Azure/Azurite/blob/master/src/blob/generated/artifacts/specifications.ts#L2027

Expected Behavior When create blob with blob name that is empty string in azurite, it can create blob successfully.

@jongio for notification.

[blueww]

@zzhxiaofeng Thanks for raising the issue! We will evaluate it.

We welcome contribution to Azurite. It would be great if you could contribute the the fix of this issue.

[v-xuto]

azsdk-azurite