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@ngxson ngxson/fetchKeyOnly.js
Last active Dec 2, 2018

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var { google } = require("googleapis");
var request = require("request");
var serviceAccountDir = "./serviceAccountKey.json"
generateAccessToken(serviceAccountDir).then(access_token => {
request({
url: "https://database-cua-ban.firebaseio.com/path/nao/do.json",
qs: {
shallow: "true",
access_token: access_token
}
}, (err, res, data) => {
console.log(data)
})
})
/**
* Tạo access_token từ serviceAccountKey.json
* @param {String} dir Đường dẫn đến file .json
* @returns {Promise} Resolve access_token
*/
function generateAccessToken(dir) {
return new Promise(resolve => {
// Load the service account key JSON file.
var serviceAccount = require(dir);
// Define the required scopes.
var scopes = [
"https://www.googleapis.com/auth/userinfo.email",
"https://www.googleapis.com/auth/firebase.database"
];
// Authenticate a JWT client with the service account.
var jwtClient = new google.auth.JWT(
serviceAccount.client_email,
null,
serviceAccount.private_key,
scopes
);
// Use the JWT client to generate an access token.
jwtClient.authorize(function(error, tokens) {
if (error) {
console.error("Error making request to generate access token:", error);
} else if (tokens.access_token === null) {
console.error("Provided service account does not have permission to generate access tokens");
} else {
resolve(tokens.access_token);
}
});
})
}
// For example:
// generateSearchIndex("Nguyen Xuan Son")
// returns ["Ngu", "Nguy", "Nguye", "Nguyen", "Xua", "Xuan", "Son"]
function generateSearchIndex(str) {
var temp = []
str.trim().split(" ").forEach(word => {
temp = temp.concat(generateSearchIndexWord(word))
})
return temp
}
function generateSearchIndexWord(word) {
if (word.length == 0) {
return []
} else if (word.length <= 3) {
return [word]
} else {
var ret = []
for (var i = 3 ; i <= word.length ; i++) {
ret.push(word.substring(0, i))
}
return ret
}
}
// Đây chỉ là code mẫu, mang tính tham khảo
var db = firebase.database()
// Danh sách id có thể lấy bằng cách dùng code từ mục 2
var ids = {
"12417221992xxxxx": true,
"16558810177xxxxx": true,
"16030810531xxxxx": true,
"22281263838xxxxx": true
}
var promises = Object.keys(ids).map(id => {
return db.ref("/user/"+id+"/gender").once("value")
})
Promise.all(promises).then(snapshots => {
var data = snapshots.map(snapshot => {
return {
id: snapshot.key,
gender: snapshot.val()
}
})
/*
data giờ sẽ thành
[
{ id: "12417221992xxxxx", gender: "female" },
{ id: "16558810177xxxxx", gender: "male" },
{ id: "16030810531xxxxx", gender: "female" },
{ id: "22281263838xxxxx", gender: "male" }
]
*/
})
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