send-slack-with-attachment.py

import os
from slack_sdk import WebClient
from slack_sdk.errors import SlackApiError

# Initialize a Web API client with your bot token
slack_bot_token = 'xoxb-your-bot-token'
client = WebClient(token=slack_bot_token)

# Define the message text
message_text = 'Hello, this is a message with a PDF attachment'

# Upload the PDF file
file_path = 'path/to/your/file.pdf'
file_name = os.path.basename(file_path)

try:
    upload_response = client.files_upload(
        channels='#your-channel-name',
        file=file_path,
        filename=file_name,
        title='My PDF File'
    )
    file_id = upload_response['file']['id']
    print(f"File uploaded: {file_id}")
except SlackApiError as e:
    print(f"Error uploading file: {e}")

# Attach the uploaded PDF file to the message
attachments = [
    {
        "fallback": "Required plain-text summary of the attachment.",
        "color": "#2eb886",
        "pretext": "Optional text that appears above the attachment block",
        "title": "My PDF File",
        "title_link": f"https://app.slack.com/files/{file_id}",  # URL to view the uploaded file
        "text": "Optional text that appears within the attachment",
    }
]

# Send the message with attachments
try:
    response = client.chat_postMessage(
        channel='#your-channel-name',
        text=message_text,
        attachments=attachments
    )
    print('Message sent: ', response['ts'])
except SlackApiError as e:
    print(f"Error sending message: {e}")