Javascript NodeJS-来自app.js的第三方Api调用
我需要在NodeJS中从后端调用第三方api,并将数据返回到前端的ajax调用 下面是我的代码:Javascript NodeJS-来自app.js的第三方Api调用,javascript,ajax,node.js,post,http-post,Javascript,Ajax,Node.js,Post,Http Post,我需要在NodeJS中从后端调用第三方api,并将数据返回到前端的ajax调用 下面是我的代码: router.post('/get_data', function(request, response){ var city_name = request.body.city_name; if(city_name in city_name_done){ } else { city_name_done.push(city_name); console.log('city_name:
router.post('/get_data', function(request, response){
var city_name = request.body.city_name;
if(city_name in city_name_done){
}
else {
city_name_done.push(city_name);
console.log('city_name: ' + city_name);
var options = {
host : 'api.openweathermap.org',
path : '/data/2.5/forecast/daily?q=' + city_name + '&mode=json&units=metric&cnt=14&appid=75e843de569fb57a783c2e73fd9a7bb5',
method : 'GET'
}
var maybe = '';
console.log('till here')
var req = http.request(options, function(res){
var body = "";
res.on('data', function(data) {
console.log('data came');
body += data;
});
res.on('end', function() {
console.log('ended too');
maybe = JSON.parse(body);
console.log(maybe.city);
});
});
console.log('here too man');
req.on('error', function(e) {
console.log('Problem with request: ' + e.message);
});
response.send(maybe);
}
});
我能够从前端的ajax post请求中获取city_name参数,但是每次执行post请求时,我都会收到500个内部服务器错误
PS:请原谅我的英语,甚至是问题的级别,因为我是NodeJS的绝对初学者您正在从从第三方api获取数据的函数调用外部返回响应。您需要从('end')部分返回响应。这是因为api调用是异步的,我们必须等待响应
res.on('end', function() {
console.log('ended too');
maybe = JSON.parse(body);
console.log(maybe.city);
response.send(maybe);
});
完整的代码是
router.post('/get_data', function(request, response){
var city_name = request.body.city_name;
if(city_name in city_name_done){
}
else {
city_name_done.push(city_name);
console.log('city_name: ' + city_name);
var options = {
host : 'api.openweathermap.org',
path : '/data/2.5/forecast/daily?q=' + city_name + '&mode=json&units=metric&cnt=14&appid=75e843de569fb57a783c2e73fd9a7bb5',
method : 'GET'
}
var maybe = '';
console.log('till here')
var req = http.request(options, function(res){
var body = "";
res.on('data', function(data) {
console.log('data came');
body += data;
});
res.on('end', function() {
console.log('ended too');
maybe = JSON.parse(body);
console.log(maybe.city);
response.send(maybe);
});
});
console.log('here too man');
req.on('error', function(e) {
console.log('Problem with request: ' + e.message);
});
res.end();
}
});
很好,与邮递员进行一次简单的“获取”,以
api.openweathermap.org/data/2.5/forecast/daily?q=Miami&mode=json&units=metric&cnt=14&appid=75e843de569fb57a783c2e73fd9a7bb5
返回结果
因此,看起来您可能缺少了类似
var http=require('http');
maybe:)我强烈建议使用npm
中的request
模块,使请求更容易处理。看
首先:这里可能不需要。您从API中获得一个JSON
字符串,然后将其解析为一个对象,但是当您发送它时,您需要再次对其进行字符串化。所以只需使用字符串形式的传入数据
其次:response.send
在end
事件之外被调用:所以发生的事情是——JavaScript是异步的——它将调用API,但不会等待响应返回,因为您自己已经在向客户端发送响应了。您需要将其放入end
回调中,以便实际等待API
这就是我要做的:
router.post('/get_data', function(request, response){
var city_name = request.body.city_name;
if(city_name in city_name_done){
return;
}
else {
city_name_done.push(city_name);
console.log('city_name: ' + city_name);
var options = {
host : 'api.openweathermap.org',
path : '/data/2.5/forecast/daily?q=' + city_name + '&mode=json&units=metric&cnt=14&appid=75e843de569fb57a783c2e73fd9a7bb5',
method : 'GET'
}
console.log('till here')
var req = http.request(options, function(res){
var body = "";
res.on('data', function(data) {
console.log('data came');
body += data;
});
res.on('end', function() {
console.log('ended too');
console.log(maybe.city);
response.send(body);
});
});
console.log('here too man');
req.on('error', function(e) {
console.log('Problem with request: ' + e.message);
});
}
});
是否定义了路径/获取数据?为什么不在服务器端使用axios?hello@Zohaib Ijaz你能回答我的问题吗?我的问题是,当我点击第三方api时,它不会发送错误或数据之类的响应。如何在我的node js应用程序中处理这种情况。