file input block in bolt-python apps

app-manifest.yml

display_information:
  name: file-uploader
features:
  bot_user:
    display_name: file-uploader
  slash_commands:
    - command: /send-files
      description: Send files on a modal
      should_escape: false
oauth_config:
  scopes:
    bot:
      - commands
      - files:read
settings:
  interactivity:
    is_enabled: true
  socket_mode_enabled: true

app.py

import logging

logging.basicConfig(level=logging.DEBUG)

import os
from slack_sdk import WebClient
from slack_bolt import App, Ack
from slack_bolt.adapter.socket_mode import SocketModeHandler

app = App(token=os.environ.get("SLACK_BOT_TOKEN"))


@app.command("/send-files")
def handle_command(body: dict, ack: Ack, client: WebClient, logger: logging.Logger):
    ack()
    res = client.views_open(
        trigger_id=body["trigger_id"],
        view={
            "type": "modal",
            "callback_id": "view-id",
            "title": {"type": "plain_text", "text": "File uploader"},
            "submit": {"type": "plain_text", "text": "Submit"},
            "close": {"type": "plain_text", "text": "Close"},
            "blocks": [
                {
                    "type": "input",
                    "block_id": "text",
                    "element": {"type": "plain_text_input", "action_id": "input"},
                    "label": {
                        "type": "plain_text",
                        "text": "Text",
                    },
                },
                {
                    "type": "input",
                    "block_id": "files",
                    "element": {
                        "type": "file_input",
                        "action_id": "input",
                        "filetypes": ["jpg", "png"],
                        "max_files": 2,
                    },
                    "label": {
                        "type": "plain_text",
                        "text": "Files",
                    },
                },
            ],
        },
    )
    logger.info(res)


@app.view("view-id")
def view_submission(ack, body, logger):
    ack()
    logger.info(body["view"]["state"]["values"])
    # {
    #     "text": {"input": {"type": "plain_text_input", "value": "test"}},
    #     "files": {
    #         "input": {
    #             "type": "file_input",
    #             "files": [
    #                 {
    #                     "id": "F0669KB228Y",
    #                     "created": 1699945350,
    #                     "timestamp": 1699945350,
    #                     "name": "xxx.png",
    #                     "title": "xxx.png",
    #                     "mimetype": "image/png",
    #                     "filetype": "png",
    #                     "pretty_type": "PNG",
    #                     "user": "U03E94MK0",
    #                     "user_team": "T03E94MJU",
    #                     "editable": False,
    #                     "size": 195423,
    #                     "mode": "hosted",
    #                     "is_external": False,
    #                     "external_type": "",
    #                     "is_public": False,
    #                     "public_url_shared": False,
    #                     "display_as_bot": False,
    #                     "username": "",
    #                     "url_private": "https://files.slack.com/xxx.png",
    #                     "url_private_download": "https://files.slack.com/xxx.png",
    #                     "media_display_type": "unknown",
    #                     "thumb_64": "https://files.slack.com/xxx.png",
    #                     "thumb_80": "https://files.slack.com/xxx.png",
    #                     "thumb_360": "https://files.slack.com/xxx.png",
    #                     "thumb_360_w": 278,
    #                     "thumb_360_h": 360,
    #                     "thumb_480": "https://files.slack.com/xxx.png",
    #                     "thumb_480_w": 371,
    #                     "thumb_480_h": 480,
    #                     "thumb_160": "https://files.slack.com/xxx.png",
    #                     "thumb_720": "https://files.slack.com/xxx.png",
    #                     "thumb_720_w": 556,
    #                     "thumb_720_h": 720,
    #                     "thumb_800": "https://files.slack.com/xxx.png",
    #                     "thumb_800_w": 800,
    #                     "thumb_800_h": 1035,
    #                     "thumb_960": "https://files.slack.com/xxx.png",
    #                     "thumb_960_w": 742,
    #                     "thumb_960_h": 960,
    #                     "thumb_1024": "https://files.slack.com/xxx.png",
    #                     "thumb_1024_w": 791,
    #                     "thumb_1024_h": 1024,
    #                     "original_w": 1088,
    #                     "original_h": 1408,
    #                     "thumb_tiny": "xxx",
    #                     "permalink": "https://files.slack.com/xxx.png",
    #                     "permalink_public": "https://slack-files.com/xxx",
    #                     "comments_count": 0,
    #                     "shares": {},
    #                     "channels": [],
    #                     "groups": [],
    #                     "ims": [],
    #                     "has_more_shares": False,
    #                     "has_rich_preview": False,
    #                     "file_access": "visible",
    #                 }
    #             ],
    #         }
    #     },
    # }


# Start your app
if __name__ == "__main__":
    SocketModeHandler(app, os.environ["SLACK_APP_TOKEN"]).start()

requirements.txt

slack-bolt>=1.18,<2