Node.js 如何反向代理客户端POST&；使用节点http代理放置请求

我试图使用节点http代理作为反向代理，但我似乎无法获得POST并将请求投入工作。文件server1.js是反向代理（至少对于url为“/转发此”的请求），server2.js是接收代理请求的服务器。请解释我做错了什么

以下是server1.js的代码：

// File: server1.js
//

var http = require('http');
var httpProxy = require('http-proxy');

httpProxy.createServer(function (req, res, proxy) {
    if (req.method == 'POST' || req.method == 'PUT') {
        req.body = '';

        req.addListener('data', function(chunk) {
            req.body += chunk;
        });

        req.addListener('end', function() {
            processRequest(req, res, proxy);
        });
    } else {
        processRequest(req, res, proxy);
    }

}).listen(8080);

function processRequest(req, res, proxy) {

    if (req.url == '/forward-this') {
        console.log(req.method + ": " + req.url + "=> I'm going to forward this.");

        proxy.proxyRequest(req, res, {
            host: 'localhost',
            port: 8855
        });
    } else {
        console.log(req.method + ": " + req.url + "=> I'm handling this.");

        res.writeHead(200, { "Content-Type": "text/plain" });
        res.write("Server #1 responding to " + req.method + ": " + req.url + "\n");
        res.end();
    }
}

// File: server1.js
//

var http = require('http');
var httpProxy = require('http-proxy');
var proxy = new httpProxy.RoutingProxy();

http.createServer(function (req, res) {
    if (req.url == '/forward-this') {
        return proxy.proxyRequest(req, res, {
            host: 'localhost',
            port: 8855
        });
    }

    if (req.method == 'POST' || req.method == 'PUT') {
        req.body = '';

        req.addListener('data', function(chunk) {
            req.body += chunk;
        });

        req.addListener('end', function() {
            processRequest(req, res);
        });
    } else {
        processRequest(req, res);
    }

}).listen(8080);

function processRequest(req, res) {
    console.log(req.method + ": " + req.url + "=> I'm handling this.");

    res.writeHead(200, { "Content-Type": "text/plain" });
    res.write("Server #1 responding to " + req.method + ": " + req.url + "\n");
    res.end();
}

下面是server2.js的代码：

// File: server2.js
// 

var http = require('http');

http.createServer(function (req, res, proxy) {
    if (req.method == 'POST' || req.method == 'PUT') {
        req.body = '';

        req.addListener('data', function(chunk) {
            req.body += chunk;
        });

        req.addListener('end', function() {
            processRequest(req, res);
        });
    } else {
        processRequest(req, res);
    }

}).listen(8855);

function processRequest(req, res) {
    console.log(req.method + ": " + req.url + "=> I'm handling this.");

    res.writeHead(200, { 'Content-Type': 'text/plain' });
    res.write("Server #2 responding to " + req.method + ': url=' + req.url + '\n');
    res.end();
}

---

http代理依赖于POST/PUT请求的

数据

和

结束

事件。server1接收请求和代理请求之间的延迟意味着http代理完全错过这些事件。这里有两个选项可以让它正常工作-您可以使用，也可以使用。在这里，路由代理似乎最合适，因为您只需要代理请求的子集。以下是修订后的server1.js：

// File: server1.js
//

var http = require('http');
var httpProxy = require('http-proxy');

httpProxy.createServer(function (req, res, proxy) {
    if (req.method == 'POST' || req.method == 'PUT') {
        req.body = '';

        req.addListener('data', function(chunk) {
            req.body += chunk;
        });

        req.addListener('end', function() {
            processRequest(req, res, proxy);
        });
    } else {
        processRequest(req, res, proxy);
    }

}).listen(8080);

function processRequest(req, res, proxy) {

    if (req.url == '/forward-this') {
        console.log(req.method + ": " + req.url + "=> I'm going to forward this.");

        proxy.proxyRequest(req, res, {
            host: 'localhost',
            port: 8855
        });
    } else {
        console.log(req.method + ": " + req.url + "=> I'm handling this.");

        res.writeHead(200, { "Content-Type": "text/plain" });
        res.write("Server #1 responding to " + req.method + ": " + req.url + "\n");
        res.end();
    }
}

// File: server1.js
//

var http = require('http');
var httpProxy = require('http-proxy');
var proxy = new httpProxy.RoutingProxy();

http.createServer(function (req, res) {
    if (req.url == '/forward-this') {
        return proxy.proxyRequest(req, res, {
            host: 'localhost',
            port: 8855
        });
    }

    if (req.method == 'POST' || req.method == 'PUT') {
        req.body = '';

        req.addListener('data', function(chunk) {
            req.body += chunk;
        });

        req.addListener('end', function() {
            processRequest(req, res);
        });
    } else {
        processRequest(req, res);
    }

}).listen(8080);

function processRequest(req, res) {
    console.log(req.method + ": " + req.url + "=> I'm handling this.");

    res.writeHead(200, { "Content-Type": "text/plain" });
    res.write("Server #1 responding to " + req.method + ": " + req.url + "\n");
    res.end();
}

---

除了@squamos

“上面的代码适用于http proxy~0.10.x。从那时起，库中的许多内容都发生了更改。下面是新版本的示例（在编写~1.0.2时）”

---

这是我的代理POST请求的解决方案。这不是最理想的解决方案，但它很有效，而且很容易理解

var request = require('request');

var http = require('http'),
    httpProxy = require('http-proxy'),
    proxy = httpProxy.createProxyServer({});

http.createServer(function(req, res) {
    if (req.method == 'POST') {
        request.post('http://localhost:10500/MyPostRoute',
                     {form: {}},
                     function(err, response, body) {
                         if (! err && res.statusCode == 200) {
                            // Notice I use "res" not "response" for returning response
                            res.writeHead(200, {'Content-Type': "application/json"});
                            res.end(body);
                         }
                         else {
                             res.writeHead(404, {'Content-Type': "application/json"});
                             res.end(JSON.stringify({'Error': err}));
                         }
                     });
    }
    else  if (req.method == 'GET') {
        proxy.web(req, res, { target: 'http://localhost/9000' }, function(err) {
            console.log(err) 
        });
    }

---

端口

10500

和

9000

是任意的，在我的代码中，我根据我托管的服务动态分配它们。这不处理PUT，而且可能效率较低，因为我正在创建另一个响应，而不是操纵当前响应

尽管这是一个旧的答案，但要使其正常工作，您应该替换

var proxy=new-httpProxy.RoutingProxy（）与
var proxy=httpProxy.createProxyServer（{}）