Add support for AppendBlob

Which service(blob, file, queue, table) does this issue concern?

blob

Which version of the Azurite was used?

3.2.0-preview

Where do you get Azurite? (npm, DockerHub, NuGet, Visual Studio Code Extension)

docker: mcr.microsoft.com/azure-storage/azurite:3.2.0-preview

What problem was encountered?

Append Blob is not supported by Azurite

log:

172.17.0.1 - - [05/Nov/2019:09:55:23 +0000] “PUT /devstoreaccount1/mycontainer/appendblob HTTP/1.1” 500 -

info: BlobStorageContextMiddleware: RequestMethod=PUT RequestURL=http://127.0.0.1/devstoreaccount1/mycontainer/appendblob RequestHeaders:{"host":"127.0.0.1:10000","accept":"*/*","date":"Tue, 05 Nov 2019 09:55:23 GMT","if-none-match":"*","x-ms-version":"2019-02-02","x-ms-blob-type":"AppendBlob","authorization":"SharedKey devstoreaccount1:lZfU9I9bfLtHQpmtQOLKx7dstF6PYPxx0HuNV4DQpj8=","x-ms-client-request-id":"7dd82105-6b37-4918-a61b-8020ace87e5a","user-agent":"azsdk-java-azure-storage-blob/12.1.0-preview.1 11.0.4; Mac OS X 10.15","content-length":"0"} ClientIP=172.17.0.1 Protocol=http HTTPVersion=1.1
info: BlobStorageContextMiddleware: Account=devstoreaccount1 Container=mycontainer Blob=appendblob
debug: PublicAccessAuthenticator:validate() Retrieved account name from context: devstoreaccount1, container: mycontainer, blob: appendblob
info: BlobSharedKeyAuthenticator:validate() Signature 1 matched.
info: HandlerMiddleware: DeserializedParameters={"options":{"metadata":{},"requestId":"7dd82105-6b37-4918-a61b-8020ace87e5a","blobHTTPHeaders":{},"leaseAccessConditions":{},"modifiedAccessConditions":{"ifNoneMatch":"*"}},"contentLength":0,"version":"2019-02-02","blobType":"AppendBlob"}
error: ErrorMiddleware: Received a MiddlewareError, fill error information to HTTP response
error: ErrorMiddleware: ErrorName=StorageError ErrorMessage=Current API is not implemented yet. Please vote your wanted features to https://github.com/azure/azurite/issues  ErrorHTTPStatusCode=500 ErrorHTTPStatusMessage=undefined ErrorHTTPHeaders={"x-ms-error-code":"APINotImplemented","x-ms-request-id":"a9ca0f8e-682e-49a2-a56f-4845c96c2569"} ErrorHTTPBody="<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n<Error>\n  <Code>APINotImplemented</Code>\n  <Message>Current API is not implemented yet. Please vote your wanted features to https://github.com/azure/azurite/issues\nRequestId:a9ca0f8e-682e-49a2-a56f-4845c96c2569\nTime:2019-11-05T09:55:23.448Z</Message>\n</Error>" ErrorStack="StorageError: Current API is not implemented yet. Please vote your wanted features to https://github.com/azure/azurite/issues\n    at AppendBlobHandler.create (/opt/azurite/dist/src/blob/handlers/AppendBlobHandler.js:8:15)\n    at /opt/azurite/dist/src/blob/generated/middleware/HandlerMiddlewareFactory.js:58:18\n    at /opt/azurite/dist/src/blob/generated/ExpressMiddlewareFactory.js:77:63\n    at Layer.handle [as handle_request] (/opt/azurite/node_modules/express/lib/router/layer.js:95:5)\n    at trim_prefix (/opt/azurite/node_modules/express/lib/router/index.js:317:13)\n    at /opt/azurite/node_modules/express/lib/router/index.js:284:7\n    at Function.process_params (/opt/azurite/node_modules/express/lib/router/index.js:335:12)\n    at next (/opt/azurite/node_modules/express/lib/router/index.js:275:10)\n    at process._tickCallback (internal/process/next_tick.js:68:7)"
error: ErrorMiddleware: Set HTTP code: 500
error: ErrorMiddleware: Set HTTP Header: x-ms-error-code=APINotImplemented
error: ErrorMiddleware: Set HTTP Header: x-ms-request-id=a9ca0f8e-682e-49a2-a56f-4845c96c2569
error: ErrorMiddleware: Set content type: application/xml

Steps to reproduce the issue?

docker run -p 10000:10000 mcr.microsoft.com/azure-storage/azurite:3.2.0-preview azurite-blob  -l /data --blobHost 0.0.0.0 -d debug.log

public class LocalAzurite {
    public static void main(String[] args) throws NoSuchFieldException, IOException {
        BlobServiceClientBuilder blobServiceClientBuilder = new BlobServiceClientBuilder()
                .connectionString("UseDevelopmentStorage=true;");
        BlobServiceClient serviceClient = blobServiceClientBuilder.buildClient();

        BlobContainerClient container = serviceClient.getBlobContainerClient("mycontainer");
        if (!container.exists()) container.create();
        System.out.println(container.exists());

        AppendBlobClient append = container.getBlobClient("appendblob").getAppendBlobClient();
        append.create();
        try (BlobOutputStream blobOutputStream = append.getBlobOutputStream()) {
            blobOutputStream.write("hello".getBytes());
        }
    }
}

pom.xml: (current master branch, built locally)

 <dependency>
            <groupId>com.azure</groupId>
            <artifactId>azure-storage-blob</artifactId>
            <version>12.1.0-preview.1</version>
        </dependency>
```

### Have you found a mitigation/solution?
no

[XiaoningLiu]

Hi @raztiff Append blob is planned in v3.7.0 release.

[d3vAdv3ntur3s]

Thanks for all the efforts! However, Is this planned into your feature development roadmap, I think it is quite a common usecase for using blob storage?