Javascript 节点 js 错误：不支持协议“https：”。预期“http：”
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Node js Error: Protocol "https:" not supported. Expected "http:"
提问by MBBertolucci
I am using IBM Bluemix to make a web service for a school project.
我正在使用 IBM Bluemix 为学校项目制作 Web 服务。
My project needs to request a JSON from an API, so I can use the data it provides. I use the http getmethod for a data set, and I am not sure if it is working properly.
我的项目需要从 API 请求 JSON，以便我可以使用它提供的数据。我将该http get方法用于数据集，我不确定它是否正常工作。
When I run my code, I get the message:
当我运行我的代码时，我收到以下消息：
Error: Protocol "https:" not supported. Expected "http:"
错误：不支持协议“https：”。预期“http：”
What is causing it and how can I solve it?
是什么原因造成的，我该如何解决？
Here is my .jsfile:
这是我的.js文件：
// Hello.
//
// This is JSHint, a tool that helps to detect errors and potential
// problems in your JavaScript code.
//
// To start, simply enter some JavaScript anywhere on this page. Your
// report will appear on the right side.
//
// Additionally, you can toggle specific options in the Configure
// menu.
function main() {
return 'Hello, World!';
}
main();/*eslint-env node*/
//------------------------------------------------------------------------------
// node.js starter application for Bluemix
//------------------------------------------------------------------------------
// HTTP request - duas alternativas
var http = require('http');
var request = require('request');
// cfenv provides access to your Cloud Foundry environment
// for more info, see: https://www.npmjs.com/package/cfenv
var cfenv = require('cfenv');
//chama o express, que abre o servidor
var express = require('express');
// create a new express server
var app = express();
// serve the files out of ./public as our main files
app.use(express.static(__dirname + '/public'));
// get the app environment from Cloud Foundry
var appEnv = cfenv.getAppEnv();
// start server on the specified port and binding host
app.listen(appEnv.port, '0.0.0.0', function() {
// print a message when the server starts listening
console.log("server starting on " + appEnv.url);
});
app.get('/home1', function (req,res) {
http.get('http://developers.agenciaideias.com.br/cotacoes/json', function (res2) {
var body = '';
res2.on('data', function (chunk) {
body += chunk;
});
res2.on('end', function () {
var json = JSON.parse(body);
var CotacaoDolar = json["dolar"]["cotacao"];
var VariacaoDolar = json["dolar"]["variacao"];
var CotacaoEuro = json["euro"]["cotacao"];
var VariacaoEuro = json["euro"]["variacao"];
var Atualizacao = json["atualizacao"];
obj=req.query;
DolarUsuario=obj['dolar'];
RealUsuario=Number(obj['dolar'])*CotacaoDolar;
EuroUsuario=obj['euro'];
RealUsuario2=Number(obj['euro'])*CotacaoEuro;
Oi=1*VariacaoDolar;
Oi2=1*VariacaoEuro;
if (VariacaoDolar<0) {
recomend= "Recomenda-se, portanto, comprar dólares.";
}
else if (VariacaoDolar=0){
recomend="";
}
else {
recomend="Recomenda-se, portanto, vender dólares.";
}
if (VariacaoEuro<0) {
recomend2= "Recomenda-se, portanto, comprar euros.";
}
else if (VariacaoEuro=0){
recomend2="";
}
else {
recomend2="Recomenda-se,portanto, vender euros.";
}
res.render('cotacao_response.jade', {
'CotacaoDolar':CotacaoDolar,
'VariacaoDolar':VariacaoDolar,
'Atualizacao':Atualizacao,
'RealUsuario':RealUsuario,
'DolarUsuario':DolarUsuario,
'CotacaoEuro':CotacaoEuro,
'VariacaoEuro':VariacaoEuro,
'RealUsuario2':RealUsuario2,
'recomend':recomend,
'recomend2':recomend2,
'Oi':Oi,
'Oi2':Oi2
});
app.get('/home2', function (req,res) {
http.get('https://www.quandl.com/api/v3/datasets/BCB/432.json?api_key=d1HxqKq2esLRKDmZSHR2', function (res3) {
var body = '';
res3.on('data', function (chunk) {
body += chunk;
});
res3.on('end', function () {
var x=json.dataset.data[0][1];
console.log("My JSON is "+x); });
});
});
});
});
});
Here is a print of the error screen I get: 
这是我得到的错误屏幕的打印件：
回答by epascarello
When you want to request an https resource, you need to use https.get, not http.get.
当您要请求 https 资源时，您需要使用https.get，而不是http.get。
回答by user169771
As a side note to anyone looking for a solution from Google... make sure you are not using an http.Agent with an https request or you will get this error.
作为任何从 Google 寻找解决方案的人的旁注......确保您没有使用带有 https 请求的 http.Agent ，否则您将收到此错误。
回答by Sarath.B
The reason for this error is that you are trying to call a HTTPS URI from a HTTP client. The ideal solution would have been for a generic module to figure out the URI protocol and take the decision to use HTTPS or HTTP internally.
此错误的原因是您尝试从 HTTP 客户端调用 HTTPS URI。理想的解决方案是让通用模块找出 URI 协议并决定在内部使用 HTTPS 还是 HTTP。
The way I overcame this problem is by using the switching logic on my own. Below is some code which did the switching for me.
我克服这个问题的方法是自己使用切换逻辑。下面是一些为我进行切换的代码。
var http = require('http');
var https = require('https');
// Setting http to be the default client to retrieve the URI.
var url = new URL("https://www.google.com")
var client = http; /* default client */
// You can use url.protocol as well
/*if (url.toString().indexOf("https") === 0){
client = https;
}*/
/* Enhancement : using the URL.protocol parameter
* the URL object , provides a parameter url.protocol that gives you
* the protocol value ( determined by the protocol ID before
* the ":" in the url.
* This makes it easier to determine the protocol, and to support other
* protocols like ftp , file etc)
*/
client=(url.protocol=="https") ? https:client;
// Now the client is loaded with the correct Client to retrieve the URI.
var req = client.get(url, function(res){
// Do what you wanted to do with the response 'res'.
console.log(res);
});
