我有一个实现express的节点项目来处理传入的GET / POST请求，我创建了处理不同类型请求的路由。我的路由为/api/twitter/search，它基本上调用一个函数，该函数使用promises来获取twitter提要并使用response.write
现在的情况是，当我使用相同的输入数据对同一路由发出两个同时请求时，两个请求的运行代码会以某种方式重合，从而产生不一致的响应。我希望单独处理对服务器的任意数量的请求，即使对请求的操作有多个异步调用/承诺。
任何人都可以在这里帮助我。我是js开发的新手，所以任何帮助都将受到赞赏
以下是代码：
我创建的路线如下：
app.post('/api/twitter/fetch',function(req,res){
var hashTag = req.body.hashtag;
var userVals = {
userEmail: req.body.uemail,
tokenVal: req.body.utoken
}
tokenController.validateToken(userVals,function(error,data){
returnObject = {status:true, data:'', error:''};
if(error!=''){
returnObject.status = false;
returnObject.data = data;
returnObject.error = error;
res.send(returnObject);
}else{
var twitterController = require('../controllers/testTwitterController');
twitterController.fetchTweets(res,hashTag);
}
});
});
以下是fetchTweets函数的代码：
var Twitter = require('twitter');
var params = require('../config/params.js');
var moment = require('moment');
//var promise = require('promise');
var globalHashTag = ''; var tweetArr = []; var responseHandle = [];
client = new Twitter({
consumer_key: params.consumer_key,
consumer_secret: params.consumer_secret,
access_token_key: params.access_token_key,
access_token_secret: params.access_token_secret
});
function fetchTweetsAsync(hashTag,max_id){
var days = 7; //Days you want to subtract from today
var tillDate = (new Date()).toISOString().split('T')[0];
var sinceDate = (new Date((new Date).getTime() - ((days) * 24 * 60 * 60 * 1000))).toISOString().split('T')[0];
var param = {q:'#'+hashTag+' since:'+sinceDate+' until:'+tillDate,include_entities:true,result_type:'recent',count:100};
if(max_id !== '' || typeof max_id != undefined)
param.max_id = max_id;
return new Promise(function(resolve,reject){
// do a thing, possibly async, then..
client.get('search/tweets',param,function(error,tweets,response){
if(error){
console.log(error);
process.exit(1);
}
if(tweets.statuses.length){//If we get tweets, send them via promise
//console.log("\n\n\n\n--------------------------------------------------------- Tweets fetched for #"+hashTag+ "-------------------------------------------------------------\n\n\n");
resolve(tweets.statuses,hashTag);
}
});
});
};
function getMaxHistory(tweets,hash){
//console.log("\n\n~~~~~~~~~~~~~~~~Total: "+ tweets.length + " results found!~~~~~~~~~~~~~~~~\n\n");
tweets.map((tweet)=>{
process.stdout.write('.');
created_at = moment(tweet.created_at).format("YYYY-MM-DD");
tweetArr.push(created_at);
});
max_id = tweets[tweets.length - 1].id - 1;
if(tweets.length == 100){
process.stdout.write('*');
return fetchTweetsAsync(hash,max_id).then(getMaxHistory);
}
else{
var total = tweetArr.length;
var finalArr = [];
finalArr = getDateWiseCount(tweetArr);
tweetArr = [];
console.log("Count array generated!");
console.log("Total: "+total);
finalArr = JSON.stringify({status:true,total:total,counts:finalArr});
return finalArr;
// console.log(finalArr);
//responseHandle.send([{status:true,total:total,counts:finalArr}]);
}
}
function getDateWiseCount(tweetArr){
tweetArr = tweetArr.sort(); //We have a sorted array, need to get the counts now
var current = null;
var count = 0; returnarr = [];
for(var i = 0; i < tweetArr.length; i++)
{
if(tweetArr[i] != current)
{
if(count > 0)
{
var date = new Date(current).toISOString();
var val = count;
returnarr.push({date:date,value:val});
//console.log(returnarr);
//console.log(current + " " + count + "<br/>");
}
current = tweetArr[i];
count = 1;
}
else
{
count++;
}
}
if(count > 0){
var date = new Date(current).toISOString();
var val = count;
returnarr.push({date:date,value:val});
}
return returnarr;
}
module.exports = {
fetchTweets: function(res,hashTag){
responseHandle = res;
fetchTweetsAsync(hashTag).then(getMaxHistory).then(function(finalArr){
res.write(finalArr);
res.end();
});
}
};