Precondition Failed (412) when reading from blob

[dsarfati]

I am getting a pre-condition failed when trying to read an image from blob.

Here is how I save the images to blob.

Here is the code to get the image out.

var blob = container.GetBlockBlobReference(imagePath);

var stream = await blob.OpenReadAsync();

The exception is thrown when I try and read the stream. This is the log for the single read event.

PUT /devstoreaccount1/app-icons?restype=container 409 0.549 ms - 146
HEAD /devstoreaccount1/app-icons/6204a98b-661a-4945-a09b-8d2d01035489.jpg 200 0.399 ms - 91880
GET /devstoreaccount1/app-icons/6204a98b-661a-4945-a09b-8d2d01035489.jpg 412 0.650 ms - 187

I looked into the azurite code and found where the headers are being checked:

azurite/lib/validation/blob/ConditionalRequestHeaders.js

Lines 51 to 54 in d1861c2

	if ((ifMatchVal !== undefined && !ifMatch) ||
	(ifUnmodifiedSinceVal !== undefined && !ifUnmodifiedSince)) {
	throw new AError(ErrorCodes.ConditionNotMetWrite); // 412
	}

I'm not sure which conditional headers are being populated since I'm not specifying anything. It might be possible that the default C# client has some preconditions?

[arafato]

@dsarfati confirmed, fixed, and released as v2.5.1. Same issue (etag was not enclosed in double parenthesis). Let me know if it works for you.

[dsarfati]

@arafato Great! Did you see my comment on #165 regarding etag format?

[arafato]

@dsarfati yes, just answered. :-)