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From "Alexander Chernavin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (JCLOUDS-1487) Blob content length is mandatory while uploading to Azure
Date Wed, 16 Jan 2019 01:19:00 GMT

    [ https://issues.apache.org/jira/browse/JCLOUDS-1487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16743508#comment-16743508
] 

Alexander Chernavin commented on JCLOUDS-1487:
----------------------------------------------

[~gaul] good point. Let me debug whats going on inside Azure SDK.

> Blob content length is mandatory while uploading to Azure
> ---------------------------------------------------------
>
>                 Key: JCLOUDS-1487
>                 URL: https://issues.apache.org/jira/browse/JCLOUDS-1487
>             Project: jclouds
>          Issue Type: Bug
>          Components: jclouds-blobstore
>    Affects Versions: 2.1.1
>            Reporter: Alexander Chernavin
>            Priority: Major
>              Labels: azureblob
>         Attachments: length_exception.txt
>
>
> Content length is mandatory while uploading to Azure using JClouds portable Blob Store
API
> {code:java}
> Blob blob = blobStore.blobBuilder(blobName)
>  .payload(new InputStreamPayload(inputStream))
>  .contentType(contentType)
>  .build();
> blobStore.putBlob(container, blob);
> {code}
> [BindAzureBlobMetadataToRequest|https://github.com/fusesource/jclouds/blame/master/providers/azureblob/src/main/java/org/jclouds/azureblob/binders/BindAzureBlobMetadataToRequest.java] class
checks that content length is specified and is greater than zero in lines 58-59. However,
according to the Azure SDK documentation, Azure [CloudBlockBlob|https://azure.github.io/azure-sdk-for-java/com/microsoft/azure/storage/blob/CloudBlockBlob.html#upload-java.io.InputStream-long-]
also accepts -1 if content length is unknown: 
> {{length}} - A {{long}} which represents the length, in bytes, of the stream data,
or -1 if unknown.
>  
> We have a use case when we need to stream a big chunk of data of unknown size directly
into a cloud storage. Portable JClouds API allows to upload files into OpenStack SWIFT without
specifying their size, but it fails on Azure.



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