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[英]streaming data from twitter stream to AJAX call from my server using express.js
[英]Express.js API call is crashing my server
我是express.js和API調用的新手,但我不知道為什么這會導致服務器崩潰? 本質上,它將第一次運行並呈現頁面,但是隨后使服務器崩潰,並顯示:
TypeError: Cannot read property 'length' of undefined
for (var i = 0; i < data.businesses.length; i++) {
代碼的相關部分:
router.get('/:term/:radius/:lat/:lng', function (req, res) {
var yelp = require("yelp").createClient({
consumer_key: "xxxx",
consumer_secret: "xxxx",
token: "xxxx",
token_secret: "xxxx"
});
yelp.search({
term: req.params.term,
radius_filter: req.params.radius,
ll: req.params.lat + ',' + req.params.lng
},
function (error, data) {
var businessesArr = [];
if (typeof data) {
for (var i = 0; i < data.businesses.length; i++) {
businessesArr.push({
name: data.businesses[i].name,
image_url: data.businesses[i].image_url
});
}
res.render('selection', {
businesses: businessesArr
});
// console.log(data);
} else {
console.log(error);
}
});
});
這行:
if (typeof data) {
總是要求真,因為無論如何它實際上都會返回一個字符串。
替換為:
if (data && data.businesses) {
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