大家好:)我的问题是response.vrite () 不起作用 为什么 ? 还有一个问题。每次启动/升级页面都会调用db.open?
var http = require("http");
var Db = require ("mongodb").Db;
var Server = require("mongodb").Server;
function start () {
'use strict';
function onRequest (request, response) {
'use strict';
var db = new Db ("TestApp", new Server ("127.0.0.1", 27017, {}));
response.writeHead(200, {"Content-Type": "application/json", "Access-Control-Allow-Origin": "*"});
db.open (function (err, db, response) {
db.collection ('ObjectCollection', function (err, collection) {
collection.find().toArray (function (err, docs) {
console.log (docs);
response.write(JSON.stringify(docs));
});
});
});
response.end();
}
http.createServer(onRequest).listen(8080);
console.log ('Server has started...')
}exports.start = start;
最佳答案
您在 response.write
之前调用 response.end
。将 response.end
调用移动到回调中,如下所示:
var http = require("http");
var Db = require ("mongodb").Db;
var Server = require("mongodb").Server;
function start () {
'use strict';
function onRequest (request, response) {
'use strict';
var db = new Db ("TestApp", new Server ("127.0.0.1", 27017, {}));
response.writeHead(200, {"Content-Type": "application/json", "Access-Control-Allow-Origin": "*"});
db.open (function (err, db, response) {
db.collection ('ObjectCollection', function (err, collection) {
collection.find().toArray (function (err, docs) {
console.log (docs);
response.write(JSON.stringify(docs));
response.end();
});
});
});
}
http.createServer(onRequest).listen(8080);
console.log ('Server has started...')
}
exports.start = start;
是的,每个请求都会打开一个新的 Db
对象,因此最好在启动期间打开一次。
关于javascript - Node.js 上的简单服务器,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13666678/