Not able to upload file using slack api files.upload

Question

This question may seem duplicate but I have tried a lot but did not get success. I am trying to upload html file using https://slack.com/api/files.upload API but I am getting below error always. response {'ok': False, 'error': 'no_file_data'}

I went through documentation [a link] https://api.slack.com/methods/files.upload and tried with different options but still i am getting the same response {'ok': False, 'error': 'no_file_data'}

Also i have seen many similar questions in stack overflow but none of them resolved the problem. [a link] no_file_data error when using Slack API upload [a link] How to upload files to slack using file.upload and requests

Below is my code.

import requests

def post_reports_to_slack(html_report):
    """
    """
    url = "https://slack.com/api/files.upload"

    # my_file = {html_report, open(html_report, 'rb'), 'html'}

    data = {
        "token": bot_user_token,
        "channels": channel_name,
        "file": html_report,
        "filetype": "html"
    }

    # data = "token=" + bot_user_token + \
    #        "&channels=" + channel_name +\
    #        "&file=" + html_report + "&filetype=" + "html"

    response = requests.post(
        url=url, data=data,
        headers={"Content-Type": "application/x-www-form-urlencoded"})
    print("response", response)
    print(response.json())
    if response.status_code == 200:
        print("successfully completed post_reports_to_slack "
                      "and status code %s" % response.status_code)
    else:
        print("Failed to post report on slack channel "
                      "and status code %s" % response.status_code)

Please help to resolve the issue.

Answer 1

I was needed to add "content" argument and "filename" argument instead of "file" argument in files.upload API payload, Now file uploading to slack channel is working fine.

import requests

def post_reports_to_slack(html_report):
    url = "https://slack.com/api/files.upload"

    with open(html_report) as fh:
        html_data = fh.read()

    data = {
        "token": bot_user_token,
        "channels": "#channel_name",
        "content": html_data,
        "filename": "report.html",
        "filetype": "html",
    }

    response = requests.post(
        url=url, data=data,
        headers={"Content-Type": "application/x-www-form-urlencoded"})
    if response.status_code == 200:
        print("successfully completed post_reports_to_slack "
                      "and status code %s" % response.status_code)
    else:
        print("Failed to post report on slack channel "
                      "and status code %s" % response.status_code)