无法使用 Whatsapp Business Cloud API 通过 webhook 返回响应

Question

我尝试使用 Whatsapp 业务云 API 和 Webhook 返回通过 Whatsapp 进行 API 调用生成的响应。我可以记录该消息，它是正确的，但是当我使用 webhook 返回它时，它不会在 Whatsapp 中发送。这是我的代码：

app.post("/webhook", (req, res) => {
  // Parse the request body from the POST
  let body = req.body;

  // Check the Incoming webhook message
  console.log(JSON.stringify(req.body, null, 2));

  // info on WhatsApp text message payload: https://developers.facebook.com/docs/whatsapp/cloud-api/webhooks/payload-examples#text-messages
  if (req.body.object) {
    if (
      req.body.entry &&
      req.body.entry[0].changes &&
      req.body.entry[0].changes[0] &&
      req.body.entry[0].changes[0].value.messages &&
      req.body.entry[0].changes[0].value.messages[0]
    ) {
      let phone_number_id =
        req.body.entry[0].changes[0].value.metadata.phone_number_id;
      let from = req.body.entry[0].changes[0].value.messages[0].from; // extract the phone number from the webhook payload
      let msg_body = req.body.entry[0].changes[0].value.messages[0].text.body; // extract the message text from the webhook payload
     axios({
    method: "POST",
    url: API_URL,
    data: {
      id: phone_number_id,
      question: msg_body,
      email: "N/A",
      conversation: [],
      save: true,
      resolved: "N/A",
      ads: 0,
    },
    headers: {
      "Content-Type": "application/json",
      "x-api-key": process.env.API_KEY,
    },
  })
    .then(apiResponse => {
      if (apiResponse.status !== 200) {
        throw new Error(`Request failed with status ${apiResponse.status}`);
      }
      return apiResponse.data;
    })
    .then(responseData => {
      console.log(responseData);
      res.status(200).json({
        message: responseData.answer,
      });
    })
    .catch(error => {
      console.error(error);
      res.status(500).json({
        message: "An error occurred while chatting.",
      });
    });
    }
   
  } 
});

如您所见，我正在控制台记录

responseData

，它向我展示了良好的响应。但正如我所提到的，当我返回它时，它不会被发送到它收到初始发布请求的 Whatsapp 电话号码。

我试图通过使用 Meta For Developers 及其 Whatsapp 业务云 API 文档来实现整个过程，但无法弄清楚。

Answer 1

看起来您正在从 WhatsApp 接收 Webhook，调用您自己的 API，然后将答案作为对原始 Webhook 请求的 JSON 响应返回。但是，这不会通过 WhatsApp 将消息发送回用户； Webhook 请求只是确认您已成功收到消息。

要将消息发送回用户，您通常必须向 WhatsApp API 发出 POST 请求，并附带必要的参数，例如收件人电话号码和消息正文。您应该在处理 webhook POST 请求的代码中执行此操作。

<pre>
    app.post("/webhook", (req, res) => {
      // Parse the request body from the POST
      let body = req.body;
    
      // Log the incoming webhook message
      console.log(JSON.stringify(req.body, null, 2));
    
      // ... (existing code to extract phone_number_id, from, and msg_body)
    
      // Make a request to your API
      axios({
        method: "POST",
        url: API_URL,
        // ... (existing code)
      })
        .then(apiResponse => {
          // ... (existing code)
        })
        .then(responseData => {
          // Log the answer received from your API
          console.log(responseData);
    
          // Prepare to send the message back to the user via WhatsApp API
          axios({
            method: "POST",
            url: "YOUR_WHATSAPP_API_ENDPOINT_HERE", // Replace with the correct endpoint URL
            headers: {
              "Content-Type": "application/json",
              Authorization: `Bearer YOUR_WHATSAPP_ACCESS_TOKEN_HERE`, // Replace with your token
            },
            data: {
              to: from, // The phone number of the user who sent the message
              type: "text",
              text: {
                body: responseData.answer, // The answer to send back
              },
            },
          })
          .then(() => {
            // Confirm the message has been sent
            res.status(200).end();
          })
          .catch((error) => {
            console.error("Error sending WhatsApp message: ", error);
            res.status(500).end();
          });
        })
        .catch(error => {
          // ... (existing code)
        });
    });

</pre>