微软团队 - 无法发送卡

Question

我正在尝试将卡发送给我的团队Webhook，如此链接中所述 https://learn.microsoft.com/en-us/microsoftteams/platform/task-modules-and-cards/cards/cards/cards/cards-reference

以下是我的代码。但是它不起作用。我也看不到任何错误。

我得到400状态代码。

代码

import json
import urllib3


class TeamsWebhookException(Exception):
    """custom exception for failed webhook call"""
    pass


class ConnectorCard:
    def __init__(self, hookurl, http_timeout=60):
        self.http = urllib3.PoolManager()
        self.payload = {}
        self.hookurl = hookurl
        self.http_timeout = http_timeout

    def text(self, mtext):
        self.payload["text"] = mtext
        return self

    def send(self):
        headers = {"Content-Type":"application/json"}
        r = self.http.request(
                'POST',
                f'{self.hookurl}',
                body=json.dumps(self.payload).encode('utf-8'),
                headers=headers, timeout=self.http_timeout)
        if r.status == 200:
            return True
        else:
            print(r.status)
            print(r.error)
            raise TeamsWebhookException(r.reason)


if __name__ == "__main__":
    myTeamsMessage = ConnectorCard("https://xxx.webhook.office.com/webhookb2/02f9df4b-8e93-4b8c-9449-0916965d46b1@6f8518e1-bbdc-41ae-a82c-024046d586dd/IncomingWebhook/270de670afcc4364bf432be076465054/9fb627e3-c22e-4741-8aaa-b962490e5fee")
    myTeamsMessage.text("this is my test message to the teams channel.")
    payload = """{
  "contentType": "application/vnd.microsoft.teams.card.o365connector",
  "content": {
    "@type": "MessageCard",
    "@context": "http://schema.org/extensions",
    "summary": "John Doe commented on Trello",
    "title": "Project Tango",
    "sections": [
        {
            "activityTitle": "John Doe commented",
            "activitySubtitle": "On Project Tango",
            "activityText": "Here are the designs",
            "activityImage": "http://connectorsdemo.azurewebsites.net/images/MSC12_Oscar_002.jpg"
        },
        {
            "title": "Details",
            "facts": [
                {
                    "name": "Labels",
                    "value": "Designs, redlines"
                },
                {
                    "name": "Due date",
                    "value": "Dec 7, 2016"
                },
                {
                    "name": "Attachments",
                    "value": "[final.jpg](http://connectorsdemo.azurewebsites.net/images/WIN14_Jan_04.jpg)"
                }
            ]
        },
        {
            "title": "Images",
            "images": [
                {
                    "image":"http://connectorsdemo.azurewebsites.net/images/MicrosoftSurface_024_Cafe_OH-06315_VS_R1c.jpg"
                },
                {
                    "image":"http://connectorsdemo.azurewebsites.net/images/WIN12_Scene_01.jpg"
                },
                {
                    "image":"http://connectorsdemo.azurewebsites.net/images/WIN12_Anthony_02.jpg"
                }
            ]
        }
    ],
    "potentialAction": [
        {
            "@context": "http://schema.org",
            "@type": "ViewAction",
            "name": "View in Trello",
            "target": [
                "https://trello.com/c/1101/"
            ]
        }
    ]
  }
}"""
    myTeamsMessage.payload = payload
    myTeamsMessage.send()