所以这是我的任务：
您必须收集每个提供给您的完整内容 URL和d将其打印到控制台（stdout）。你不需要打印 超出长度，只将数据作为字符串;每个网址一行。抓住了 是你必须按照与URL相同的顺序打印出来 作为命令行参数提供给你。
我这样做：
var http = require('http');
var dataStream = [];
var dataArr = [];
var count = 0;
/*
Function to print results
@dataArr - array
*/
function printResults(dataArr) {
for (var i = 0; i < process.argv.length - 2; i++)
console.log(dataArr[i]);
}
/*
Function to get data from http
@i - int
Getting command line arguments as parametrs.
*/
function httpGet(i) {
http.get(process.argv[2 + i], function(res) {
res.setEncoding('utf8');
res.on('data', function(data) {
dataStream.push(data);
});
res.on('end', function() {
dataArr[i] = (dataStream.join(""));
dataStream = [];
count++;
if (count == process.argv.length - 2) {
printResults(dataArr);
}
});
res.on('error', function(e) {
console.log("Got error: " + e.message);
});
});
}
for (var i = 0; i < process.argv.length - 2; i++) {
httpGet(i);
}
由于某种原因，有时它会按照预期将数据存储在数组中，但有时它会中断并输出完全无意义的内容。
一些结果示例：
工作时：
$ learnyounode verify program.js
Your submission results compared to the expected:
────────────────────────────────────────────────────────────────────────────
────
1. ACTUAL: "Shazza got us some trackies when as stands out like dog's ba
lls. Grab us a show pony heaps he hasn't got a lurk. She'll be right rubbish
mate it'll be budgie smugglers. You little ripper bloke heaps we're going t
op end. He's got a massive bog standard also built like a freckle. "
1. EXPECTED: "Shazza got us some trackies when as stands out like dog's ba
lls. Grab us a show pony heaps he hasn't got a lurk. She'll be right rubbish
mate it'll be budgie smugglers. You little ripper bloke heaps we're going t
op end. He's got a massive bog standard also built like a freckle. "
2. ACTUAL: "As dry as a sook and as dry as a cleanskin. As cunning as a
metho where get a dog up ya parma. "
2. EXPECTED: "As dry as a sook and as dry as a cleanskin. As cunning as a
metho where get a dog up ya parma. "
3. ACTUAL: "Gutful of gyno how come a mokkies. It'll be clacker and buil
t like a holy dooley!. Get a dog up ya boozer heaps come a captain cook. "
3. EXPECTED: "Gutful of gyno how come a mokkies. It'll be clacker and buil
t like a holy dooley!. Get a dog up ya boozer heaps come a captain cook. "
4. ACTUAL: ""
4. EXPECTED: ""
这是一个不工作的例子：
$ learnyounode verify program.js
Your submission results compared to the expected:
────────────────────────────────────────────────────────────────────────────
────
1. ACTUAL: "of bogan with it'll be rort. He hasn't got a give it a burl
flamin you little ripper dinky-di. Watch out for the mate's rate to shazza g
ot us some swag. "
1. EXPECTED: "He's got a massive op shop to you little ripper corker. Gutf
ul of bogan with it'll be rort. He hasn't got a give it a burl flamin you li
ttle ripper dinky-di. Watch out for the mate's rate to shazza got us some sw
ag. "
2. ACTUAL: "You little ripper thongs when as stands out like ropeable. T
rent from punchy boardies bloody as cunning as a brisvegas. "
2. EXPECTED: "You little ripper thongs when as stands out like ropeable. T
rent from punchy boardies bloody as cunning as a brisvegas. "
3. ACTUAL: "As dry as a uluru when come a scratchy. Flat out like a ute
with get a dog up ya chrissie. As busy as a fair go no worries it'll be fair
dinkum. She'll be right freo when it'll be cracker. He's Watch got out a fo
r massive the op crook shop my to as you busy little as ripper a corker. bru
mby. Gutful "
3. EXPECTED: "As dry as a uluru when come a scratchy. Flat out like a ute
with get a dog up ya chrissie. As busy as a fair go no worries it'll be fair
dinkum. She'll be right freo when it'll be cracker. Watch out for the crook
my as busy as a brumby. "
4. ACTUAL: ""
4. EXPECTED: ""
答案 0 :(得分：1)
请勿将res.on（“data”）上收到的数据视为数组。相反，将其视为字符串并将其定义为http函数中的变量（而不是全局变量）并执行str += data。
或者，您可以查看使用像Async这样的库来管理您需要执行的异步函数的正确排序，因为您需要按顺序执行和返回每个Async。
答案 1 :(得分：0)
所以问题是：
您的代码假设3个http响应不会 重叠 - 一个响应的数据事件以前永远不会发生 在上一次回复的结束事件中，情况并非总是如此。一世 建议你在里面移动dataStream变量的定义 你的httpGet函数，这样每个请求/响应都会有它 自己的变量，无论如何都不能相互干扰 定时。
所以我重构了我的解决方案看起来像这样，现在它可以100％的时间工作：
var http = require('http');
var dataArr = [];
var count = 0;
/*
Function to print results
@dataArr - array
*/
function printResults(dataArr) {
for (var i = 0; i < process.argv.length - 2; i++) {
console.log(dataArr[i].replace('undefined', ''));
}
}
/*
Function to get data from http
@i - int
Getting command line arguments as parametrs.
*/
function httpGet(i) {
http.get(process.argv[2 + i], function(res) {
res.setEncoding('utf8');
res.on('data', function(data) {
dataArr[i] += data;
});
res.on('end', function() {
count++;
if (count == process.argv.length - 2) {
printResults(dataArr);
}
});
res.on('error', function(e) {
console.log("Got error: " + e.message);
});
});
}
for (var i = 0; i < process.argv.length - 2; i++) {
httpGet(i);
}