/
index.js
144 lines (121 loc) · 4.88 KB
/
index.js
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const request = require('request');
const convert = require('xml-js');
const aws = require('aws-sdk');
const dynamo = new aws.DynamoDB.DocumentClient();
const tableName = process.env.tableName;
const stationId = '122000202';
exports.handler = async (event) => {
console.log('## ENVIRONMENT VARIABLES: ' + JSON.stringify(process.env));
console.log('## EVENT: ' + JSON.stringify(event));
let statusCode;
let isCompleted = false;
let predictTime="", plateNo="", remainSeatCnt="", routeId="";
const date = new Date();
let timestamp = Math.floor(date.getTime()/1000).toString();
let arrivalInfo = [];
try {
// Get bus location infomation in Centerfield
const params = {
uri: 'http://openapi.gbis.go.kr/ws/rest/busarrivalservice/station',
method: 'GET',
qs:{
serviceKey: '1234567890', // default
stationId: stationId,
},
};
makeRequest(params, function(responseCode, json){
if(responseCode==200) {
var res = JSON.parse(json);
console.log('json: '+JSON.stringify(res.response));
if(res.response.msgHeader.resultCode._text == '0') { // Success
const list = res.response.msgBody.busArrivalList;
for(let i=0;i<list.length;i++) {
predictTime = list[i].predictTime1._text;
plateNo = list[i].plateNo1._text;
remainSeatCnt = list[i].remainSeatCnt1._text;
routeId = list[i].routeId._text;
console.log('RouteId: '+routeId+', No: '+plateNo+', predictTime: '+predictTime+', remainSeatCnt: '+remainSeatCnt);
// Get BusNumber
const busInfo = {
Timestamp: timestamp,
RouteId: routeId,
PlateNo: plateNo,
PredictTime: predictTime,
RemainSeatCnt: remainSeatCnt
}
arrivalInfo.push(busInfo);
// putItem to DynamoDB
var putParams = {
TableName: tableName,
Item: {
Timestamp: timestamp,
RouteId: routeId,
PlateNo: plateNo,
PredictTime: predictTime,
RemainSeatCnt: remainSeatCnt
}
};
dynamo.put(putParams, function(err){
if (err) {
console.log('Failure: '+err);
}
});
}
// save arrivalInfo to dynamoDB
for(let i=0;i<arrivalInfo.length;i++) {
console.log('arrivalInfo['+i+']: '+JSON.stringify(arrivalInfo[i]));
}
isCompleted = true;
}
else { // Success but no bus
statusCode = '404';
console.log(statusCode+': '+res.response.msgHeader.resultMessage._text);
isCompleted = true;
}
}
else { // Failure to request
statusCode = responseCode;
console.log(statusCode+': '+responseCode);
isCompleted = true;
}
});
} catch(err) {
console.log(err);
};
function wait(){
return new Promise((resolve, reject) => {
if(!isCompleted) {
setTimeout(() => resolve("wait..."), 1000)
}
else {
setTimeout(() => resolve("wait..."), 0)
}
});
}
console.log(await wait());
console.log(await wait());
console.log(await wait());
console.log(await wait());
console.log(await wait());
const response = {
statusCode: statusCode,
result: JSON.stringify(arrivalInfo)
};
return response
}
function makeRequest(options, callback) {
request(options, function (error, response, body) {
let statusCode = response.statusCode;
if(!error && statusCode==200) {
// console.log('response: '+JSON.stringify(response));
statusCode = response.statusCode;
// console.log('xml: '+body);
var json = convert.xml2json(body, {compact: true, spaces: 4});
callback(statusCode,json);
}
else {
console.log('error: '+error);
callback(statusCode,"");
}
});
}