Node.js 通过云功能访问Firestore

因此，我在同一个文件中有两个云函数：

exports.Auth = functions.region('europe-west1').https.onRequest((req, res) =>

及

---

当在Auth函数的开头添加以下代码时，它会像预期的那样向Firestore添加一个新文档，但是，当我在IPN函数的开头添加相同的代码时（当前正在通过Paypal的IPN模拟器调用），它不会执行任何操作，也不会出错

  let pin = RandomPIN(10, '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
  var userRef = db.collection('Users').doc(pin);
  var setWithOptions = userRef.set({ Activated: false }, { merge: true });
  console.log("PIN: "+pin);

到底发生了什么事，我一定错过了什么

提前谢谢

更新：

exports.IPN = functions.region('europe-west1').https.onRequest((req, res) =>
{
  console.log("IPN Notification Event Received");

  let pin = RandomPIN(10, '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
  var userRef = db.collection('Users').doc(pin);
  var setWithOptions = userRef.set({ Activated: false }, { merge: true });
  console.log("PIN: "+pin);

  if (req.method !== "POST")
  {
    console.error("Request method not allowed.");
    res.status(405).send("Method Not Allowed");
  }
  else
  {
    console.log("IPN Notification Event received successfully.");
    res.status(200).end();
  }

  let ipnTransactionMessage = req.body;
  // Convert JSON ipn data to a query string since Google Cloud Function does not expose raw request data.
  let formUrlEncodedBody = querystring.stringify(ipnTransactionMessage);
  // Build the body of the verification post message by prefixing 'cmd=_notify-validate'.
  let verificationBody = `cmd=_notify-validate&${formUrlEncodedBody}`;

  console.log(`Verifying IPN: ${verificationBody}`);

  let options = {
    method: "POST",
    uri: getPaypalURI(),
    body: verificationBody,
  };

  // POST verification IPN data to paypal to validate.
  request(options, function callback(error, response, body)
  {
    if(!error && response.statusCode === 200)
    {
      if(body === "VERIFIED")
      {
        console.log(`Verified IPN: IPN message for Transaction ID: ${ipnTransactionMessage.txn_id} is verified.`);
        SendPIN(ipnTransactionMessage.payer_email, pin);
      }
      else if(body === "INVALID")
        console.error(`Invalid IPN: IPN message for Transaction ID: ${ipnTransactionMessage.txn_id} is invalid.`);
      else
        console.error("Unexpected reponse body.");
    }
    else
    {
      console.error(error);
      console.log(body);
    }
  });
});

下面是日志，首先是有注释的中间两行，然后是未注释的。它似乎在默默地失败，我只是不确定是什么导致了它

具有完整功能的更新：

exports.IPN = functions.region('europe-west1').https.onRequest((req, res) =>
{
  console.log("IPN Notification Event Received");

  let pin = RandomPIN(10, '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
  var userRef = db.collection('Users').doc(pin);
  var setWithOptions = userRef.set({ Activated: false }, { merge: true });
  console.log("PIN: "+pin);

  if (req.method !== "POST")
  {
    console.error("Request method not allowed.");
    res.status(405).send("Method Not Allowed");
  }
  else
  {
    console.log("IPN Notification Event received successfully.");
    res.status(200).end();
  }

  let ipnTransactionMessage = req.body;
  // Convert JSON ipn data to a query string since Google Cloud Function does not expose raw request data.
  let formUrlEncodedBody = querystring.stringify(ipnTransactionMessage);
  // Build the body of the verification post message by prefixing 'cmd=_notify-validate'.
  let verificationBody = `cmd=_notify-validate&${formUrlEncodedBody}`;

  console.log(`Verifying IPN: ${verificationBody}`);

  let options = {
    method: "POST",
    uri: getPaypalURI(),
    body: verificationBody,
  };

  // POST verification IPN data to paypal to validate.
  request(options, function callback(error, response, body)
  {
    if(!error && response.statusCode === 200)
    {
      if(body === "VERIFIED")
      {
        console.log(`Verified IPN: IPN message for Transaction ID: ${ipnTransactionMessage.txn_id} is verified.`);
        SendPIN(ipnTransactionMessage.payer_email, pin);
      }
      else if(body === "INVALID")
        console.error(`Invalid IPN: IPN message for Transaction ID: ${ipnTransactionMessage.txn_id} is invalid.`);
      else
        console.error("Unexpected reponse body.");
    }
    else
    {
      console.error(error);
      console.log(body);
    }
  });
});

---

实际上，这是承诺链接的问题，也是由于

请求

库引起的问题：

请求

本机支持回调接口，但不返回承诺，这是云函数中必须执行的操作

我建议您观看Doug:的官方Firebase视频，这些视频解释了这一关键概念

您可以使用

请求承诺

（）和

rp（）

方法，该方法“返回常规承诺/a+符合承诺”

尚不清楚

SendPIN（）

在做什么。让我们假设它返回一个承诺。如果这是真的，您可以按照以下行调整代码：

//....
const rp = require('request-promise');
//....

exports.IPN = functions.region('europe-west1').https.onRequest((req, res) => {
  console.log('IPN Notification Event Received');

  let pin = RandomPIN(
    10,
    '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
  );
  var userRef = db.collection('Users').doc(pin);

  if (req.method !== 'POST') {
    console.error('Request method not allowed.');
    res.status(405).send('Method Not Allowed');
  } else {
    let ipnTransactionMessage;
    userRef
      .set({ Activated: false }, { merge: true })
      .then(() => {
        console.log('PIN: ' + pin);
        ipnTransactionMessage = req.body;
        // Convert JSON ipn data to a query string since Google Cloud Function does not expose raw request data.
        let formUrlEncodedBody = querystring.stringify(ipnTransactionMessage);
        // Build the body of the verification post message by prefixing 'cmd=_notify-validate'.
        let verificationBody = `cmd=_notify-validate&${formUrlEncodedBody}`;

        console.log(`Verifying IPN: ${verificationBody}`);

        let options = {
          method: 'POST',
          uri: getPaypalURI(),
          body: verificationBody
        };
        // POST verification IPN data to paypal to validate.
        return rp(options);
      })
      .then(response => {
        //Not sure what you will get within the response object...
        console.log(
          `Verified IPN: IPN message for Transaction ID: ${
            ipnTransactionMessage.txn_id
          } is verified.`
        );
        return SendPIN(ipnTransactionMessage.payer_email, pin); //It is not clear what SendPIN is doing, let's make the assumption it returns a Promise...
      })
      .then(() => {
        res.send('Success');
        return null;
      })
      .catch(err => {
        console.error(
          `Invalid IPN: IPN message for Transaction ID: ${
            ipnTransactionMessage.txn_id
          } is invalid.`
        );
        res
          .status(500)
          .send(
            'Error: ' +
              err +
              ` - Invalid IPN: IPN message for Transaction ID: ${
                ipnTransactionMessage.txn_id
              } is invalid.`
          );
        return null;
      });
  }
});

---

“目前正在通过Paypal的IPN模拟器调用该函数”你确定该函数确实被调用了吗？是的，如果我注释掉中间的2个firestore行，它会验证模拟事务。请将此信息添加到您的问题中，以便我们可以清理注释痕迹。您是否返回

set（）返回的承诺

方法？您应该将函数的整个代码添加到问题中，这可能是因为您没有返回并链接不同的承诺。请编辑问题，以显示整个函数没有按照您期望的方式工作，而不仅仅是其中的几行。感谢链接和您的帮助，SendPIN只是一个void函数，它使用nodeEmailer发送pin的电子邮件。我不确定它是否相关，但我得到一个错误@res.send（'Success'）；“error Each then（）应返回值或抛出承诺/始终返回”SendPIN是否异步并返回承诺？不，它只是一个同步的无效函数函数SendPIN（email，pin），它只调用nodeEmailer.createTransport，然后调用transporter.sendmail是否确定它不是异步的？请参阅：“如果未设置回调参数，则该方法返回一个承诺对象。NodeEmailer本身在内部不使用承诺，但为了方便起见，它将返回包装为承诺。”我通过添加

return null修改了答案在
res.send（'Success'）之后。然而，我不是100%肯定这是解决你提到的问题的最好办法。在这一点上听听道格或弗兰克的意见是很有趣的。