How to create a Slack message containing an uploaded image?

Question

I\'d like to create a message in the #general channel of my Slackspace from within a PHP script. The message should contain text and an image which was created locally on-th

Answer 1

After much tinkering I found that while I could not use the API to create a message and upload an image simultaneously, I can first upload an image and then, with the timestamp returned, use update message to add text to the original message with the image upload.

This is the flow:

1- Use files_upload method to upload an image to my channel (using the channel name)

            response = client.files_upload(
            channels=my_channel_name,
            file=image_path,
            initial_comment='My initial comment'
            )

2- Get the response from the files_upload and extract the channel id and timestamp of the message.

channel_id = response['file']['groups'][0]
ts = response['file']['shares']['private'][channel_id][0]['ts']

3- Use chat update to add text or rich content to the message with the uploaded image:

       response = client.chat_update(
            channel=channel_id,
            text="My Message",
            ts=ts,
            blocks=blocks_list
        )