Storage Gen2 API in Postman

Question

Hi ,

I am new to Azure Portal and would like to use the Azure Gen2 API to create the files on storage.

I have been able to generate the access token in Postman -

https://login.microsoftonline.com/\<tenant id>/oauth2/v2.0/token

I now have access token to be used.

Now I call -

https://storageaccountshiv.dfs.core.windows.net/blue?resource=filesystem

Headers passed are -

Authorization : Bearer {access token}
x-ms-version : 2020-12-23
Content-Length : 0

But complains
{
"error": {
"code": "InvalidHeaderValue",
"message": "The value for one of the HTTP headers is not in the correct format.\nRequestId:34111c9a-d01f-0004-1787-d9cf50000000\nTime:2020-12-23T23:55:50.5175280Z"
}
}

I went through some posts and it says this is what we need to pass. Any idea what could be missing here.

This should create a folder under "Blob Containers".. Correct?

Thanks in advance.

Thanks,
Shiv

Answer 1

In Azure portal, generate the "Shared Access Signature".

Paste the File service SAS URL into Postman to create the file "abc.txt"

https://storageaccountshiv.dfs.core.windows.net/blue/abc.txt?sv=2019-12-12&ss=bfqt&srt=sco&sp=rwdlacupx&se=2020-12-31T02:36:19Z&st=2020-12-30T18:36:19Z&spr=https&sig=qbX6rmPtzQzc%3BKldZwf9sR98a7UWLOiy0RFUZj6KK6U%3D

Note:
In this example, select everything in "Allowed services", "Allowed resource types", "Allowed permissions" and "Blob versioning permissions"

Answer 2

I created a container "shiv" through Azure portal and now using API want to add a file in this container.

Copied File Service SAS URL and added /shiv/abc.txt

https://storageaccountshiv.file.core.windows.net/shiv/abc.txt?sv=2019-12-12&ss=bfqt&srt=sco&sp=rwdlacupx&se=2020-12-31T03:33:47Z&st=2020-12-30T19:33:47Z&spr=https&sig=YBJW3pYdL1t0qnqfYb58tvyK8i2tDDSyOJeMgWwGXY%3D

Response is -

Answer 3

Hi @Shiv Khullar ,

Please follow the following steps to create the container called "shiv2":

Step 1) Create Create a storage account to use with Azure Data Lake Storage Gen2, https://learn.microsoft.com/en-us/azure/storage/blobs/create-data-lake-storage-account

Step 2) Generate SAS

(Note: Use the Blob Service URL)

Step 3) Test with Postman

(Note: Set the header, x-ms-blob-type: BlockBlob)

Step 4) Examine "Data Lake Storage" in Azure portal that the container "shiv2" has been created successfully.

Answer 4

Hi TeikHengSun-1687,

Thanks a lot for sharing the detailed steps.. I feel these steps are missing in the documentation.

Create container worked like a charm.

I have two more questions -

1. Can you pls send me postman request to create a file under the container. What would be the filesystem and restype and if any header needs to be added.
2. I would like to try the same create container and create file under the container with oAuth2.0 authentication. Was not successful in doing that.
   I am able to generate the oAuth2.0 accesstoken but when I try to use it to create the container , it doesnt work.

Thank you so much for your support.

Thanks,
Shiv

Answer 5

@Shiv Khullar Updating the thread after the issue is been fixed , this can be beneficial to other community members who is facing the similar issue.

Proper parameters and syntax for Postman,
The documentation which we are following: Put Blob (REST API) - Azure Storage | Microsoft Learn
PUT: https://<storageaccount>.blob.core.windows.net/<container>

Include Headers:

Authorization - REQUIRED
X-ms-date = ‘Tue, 05 Jan hh:mm:ss GMT - REQUIRED
X-ms-version = 2020-02-10 – REQUIRED
Content-Length = 0 - REQUIRED

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