How do I “create”/“assign” a logging handler for Google Cloud Pubsub?

Question

Development from the previous thread found that the assumptions when asking the question were off-topic (subprocess was actually not causing the problems), so I\'m making a more

Answer 1

First, if I understand correctly by what you are showing in your output, you are using a Pub/Sub notification to send a message whenever you make changes to a Cloud Storage object. This information could be helpful.

Now, message.data["name"] is not going to work because message.data is a BYTES object. Thus, can't be indexed as a dict.

To treat it as a dict, you first have to decode it as base64 (import base64). After that, what you are left is a string which looks like JSON format. You then use json.load() (don't forget to import json) to transform this string into a dict. Now you can index the message.

The code for this will be:

print("This is before variables")
dirpath = "/subfolder1/"
print(dirpath)

#Transform the bytes object into a string by decoding it
namepath = base64.b64decode(message.data).decode('utf-8')

#Transform the json formated string into a dict
namepath = json.loads(namepath)

print(namepath["name"])
fullpath = dirpath + namepath["name"]
print(fullpath)
print("this is after variables")

Now, if your intent is to read the attributes only, they are properly defined at the top like:

    if message.attributes:
        print('Attributes:')
        for key in message.attributes:
            value = message.attributes.get(key)
            print('{}: {}'.format(key, value))

So, you could use:

    print("this is before variables")
    dirpath = "~/subfolder1/"
    print(dirpath)
    namepath = message.attributes["objectId"]
    print(namepath)
    fullpath = dirpath + namepath
    print(fullpath)
    print("this is after variables")

Keep in mind that for this particular case, "objectId" is the name of the file because it's the attribute that the notification from Pub/Sub for Cloud Storage uses. If you pretend to send custom messages, change "objectId" to your desired attribute name.