我正在開發一個Facebook聊天漫遊器,它與Firebase的雲端函數相關聯。Firebase的雲端函數:HTTP觸發器 - Promise/Async
僞代碼:
- 收到的用戶消息
- 檢查,如果這是
- 檢索來自URL內容/文章+ HTML(使用節點庫
read-art
) - 存儲有數據的有效網址到Firebase數據庫
- 發送回覆給用戶(Facebook消息)
我寫了所有5個部件,並單獨測試了所有部件,但是我有問題將所有部件鏈接起來。我想問幾個問題。
哪裏/何時應該撥打
response.sendStatus(200);
?我稱爲response.sendStatus(200);
後,Firebase功能是否被終止? (根據firebase文檔,答案似乎是肯定的)。所以我試圖把這一行放在promise
塊內,並且firebase提示timeout
消息在日誌文件中有沒有解決問題的建議?我應該如何構建我的功能?
exports.messengerWebhook = functions.https.onRequest((request, response) => {
var data = request.body;
// Make sure this is a page subscription
if (data.object === "page") {
// Iterate over each entry - there may be multiple if batched
data.entry.forEach(function(entry) {
var pageID = entry.id;
var timeOfEvent = entry.time;
// Iterate over each messaging event
entry.messaging.forEach(function(event) {
if (event.message) {
receivedMessage(event);
} else {
console.log("Webhook received unknown event: ", event);
}
});
});
response.sendStatus(200);
}
});
function receivedMessage(event) {
// Putting a stub for now, we'll expand it in the following steps
var senderID = event.sender.id;
var recipientID = event.recipient.id;
var timeOfMessage = event.timestamp;
var message = event.message;
console.log(
"Received message for user %d and page %d at %d with message:",
senderID,
recipientID,
timeOfMessage
);
console.log(JSON.stringify(message));
var messageId = message.mid;
var messageText = message.text;
var messageAttachments = message.attachments;
if (validUrl.isHttpUri(messageText) || validUrl.isHttpsUri(messageText)) {
// If we receive a text message, check to see if it matches a keyword
// and send back the example. Otherwise, just echo the text we received.
switch (messageText) {
case "generic":
extractContentAndSave(messageText);
break;
default:
sendTextMessage(senderID, messageText);
}
} else {
sendTextMessage(senderID, "This is not a url");
}
}
function extractContentAndSave(url) {
read(url, function(err, art, options, resp) {
if (err) {
throw err;
}
var title = art.title, // title of article
content = art.content, // content of article
html = art.html; // whole original innerHTML
admin
.database()
.ref("webpage")
.push({
url: url,
title: title,
content: content,
rawHtml: html
//cachedPageUrl:
})
.then(
{
//Send response to user via Facebook Messenger
}
);
console.log("[STATUS CODE]", resp && resp.statusCode);
// sendTextMessage(senderID, title);
});
}
我剛剛發現,然後'讀藝術'提供Promoise回調,我鏈接,現在一切正常。謝謝。 –