I need to react to a blob that's added into a sub-folder. I know that blob storage doesn't recognize the folders, they are just virtual, but I still can't figure out how to create a blob trigger if files are added to sub-folders.
Example:
Excerpt from function.json:
{
"name": "myblob",
"type": "blobTrigger",
"direction": "in",
"path": "rootContainer/{name}"
}
OK, a function is triggered and I receive the blob
Excerpt from function.json:
{
"name": "subfolder/myblob",
"type": "blobTrigger",
"direction": "in",
"path": "rootContainer/{name}"
}
or
{
"name": "myblob",
"type": "blobTrigger",
"direction": "in",
"path": "rootContainer/subfolder/{name}"
}
NOT OK, a function isn't triggered
There are not many questions regarding this problem and they still don't provide a normal answer. Can't find any info in documentation either.
Thanks!
Shortly speaking, "path": "rootcontainer/subfolder/{name}" should work.
Logs panel on function portal may not show logs in time, you can go to https://{functionappname}.scm.azurewebsites.net/DebugConsole, then navigate to D:\home\LogFiles\Application\Functions\function\yourblobtriggername to see log files.
If you use blob name in your function code, path should include {name}, otherwise function won't run due to runtime exception.
If you set path as a container like mycontainer or mycontainer/{name}, all files written to this container(including those uploaded to virtual subfolder) will trigger the function.
As you have mentioned:
it's fired when a root is
rootcontainer, and blob which comes has the following namesubfolder/{name}
If you set it as a subfolder like mycontainer/subfolder/{name}, only files written to this subfolder will trigger the function.
If set to mycontainer/subfolder, not triggered as you have found.
Feel free to ask if you have further questions.