javascript - 使用来自客户端的信息进行 Node Js/Express api 调用

Question

所以我正在编写一个web应用程序来从steam api获取信息，并且我遇到了一些cors问题，所以我编写了一个node/express服务器来执行实际的api调用，然后客户端应用程序从我的服务器获取json 。这是有效的，但前提是 api 调用在我的服务器上进行了硬编码。如何从客户端的“sid”表单字段向服务器提供用户 ID？

服务器代码:

var express = require('express');  
var request = require('request');

var app = express();  
function proxy(){
  app.use('/', function(req, res) {
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
    var apiServerHost = "http://api.steampowered.com/ISteamUser/GetPlayerSummaries/v0002/?key=[APIKEY]&steamids=";
    var userId = 76561197972495328;
    var url = apiServerHost+userId;
    req.pipe(request(url)).pipe(res);
  });
}

proxy();


app.listen(process.env.PORT || 3000); 

客户端代码:

function submit(){
    $(document).ready(function(){
        var sid = document.getElementById("idform").elements[0].value;
        $.getJSON("http://localhost:3000/", function(result){
            console.log(result);
            console.log(result.response.players[0]);
            for(i in result.response.players[0]){
                document.getElementById("main").appendChild(document.createTextNode(i + " : " + result.response.players[0][i]));
                document.getElementById("main").appendChild(document.createElement("br"));
            }
        });
    });
}

Answer 1

试试这个:

服务器代码:

var express = require('express');  
var request = require('request');

var app = express();  
function proxy(){
  app.use('/', function(req, res) {
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
    var apiServerHost = "http://api.steampowered.com/ISteamUser/GetPlayerSummaries/v0002/?key=[APIKEY]=";
    var userId = encodeURIComponent(req.query.sid);
    var url = apiServerHost+userId;
    req.pipe(request(url)).pipe(res);
  });
}

proxy();


app.listen(process.env.PORT || 3000); 

客户端代码:

function submit(){
    $(document).ready(function(){
        var sid = document.getElementById("idform").elements[0].value;
        $.getJSON("http://localhost:3000/?sid=" + encodeURIComponent(sid), function(result){
            console.log(result);
            console.log(result.response.players[0]);
            for(i in result.response.players[0]){
                document.getElementById("main").appendChild(document.createTextNode(i + " : " + result.response.players[0][i]));
                document.getElementById("main").appendChild(document.createElement("br"));
            }
        });
    });
}