javascript 使用 node-http-proxy 转发每个请求
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Forward every request with node-http-proxy
提问by greenish
I'm trying to setup a node-http-proxy that just forwards requests. In the end this proxy should inject javascript in every website I visit through the browser..
我正在尝试设置一个仅转发请求的 node-http-proxy。最后，这个代理应该在我通过浏览器访问的每个网站中注入 javascript..
Right now, most pages are forwarded and displayed correctly, but some, like posterkoenig.chor verkehrsclub.chare returning either a blank page or there is an error on the page. Both sites work well without the proxy in place. What do I have to change, or what am I missing that gets not forwarded correctly?
目前，大多数页面都已正确转发和显示，但有些页面（如posterkoenig.ch或 verkehrsclub.ch）要么返回空白页面，要么页面上有错误。这两个站点在没有代理的情况下运行良好。我必须改变什么，或者我错过了什么没有正确转发？
Im very new to nodejs and not even completely sure if my approach should work or not.
我对 nodejs 很陌生，甚至不确定我的方法是否可行。
Here is what I've got so far:
这是我到目前为止所得到的：
var httpProxy = require('http-proxy');
var url = require('url');
httpProxy.createServer(function(req, res, proxy) {
var urlObj = url.parse(req.url);
proxy.proxyRequest(req, res, {
host: urlObj.host,
port: 80,
changeOrigin: true,
enable : { xforward: true }
});
}).listen(9000, function () {
console.log("Waiting for requests...");
});
Update
更新
As suggested by @robertklep I removed changeOriginand redefined req.headers.hostand also req.headers.url
正如@robertklep建议我删除changeOrigin和重新定义req.headers.host，也req.headers.url
posterkoenig.ch:
海报koenig.ch：
Now throws:
现在抛出：
An error has occurred:
{"code":"ENOTFOUND","errno":"ENOTFOUND","syscall":"getaddrinfo"}
verkehrsclub.ch:
verkehrsclub.ch:
The frontpage works now but subpages still throw a error on the page.
首页现在可以工作，但子页面仍然在页面上抛出错误。
var httpProxy = require('http-proxy');
var url = require('url');
httpProxy.createServer(function(req, res, proxy) {
var urlObj = url.parse(req.url);
req.headers['host'] = urlObj.host;
req.headers['url'] = urlObj.href;
proxy.proxyRequest(req, res, {
host: urlObj.host,
port: 80,
enable : { xforward: true }
});
}).listen(9000, function () {
console.log("Waiting for requests...");
});
回答by robertklep
Your first problem is related to changeOrigin: that will send a Hostheader to the remote server which includes a port number, and both sites you mention can't handle that.
您的第一个问题与changeOrigin：这将向Host远程服务器发送一个包含端口号的标头，而您提到的两个站点都无法处理。
Instead, try this:
相反，试试这个：
req.headers.host = urlObj.host;
req.url = urlObj.path;
proxy.proxyRequest(req, res, {
host: urlObj.host,
port: 80,
enable : { xforward: true }
});
As for your other problem, I think it might be related to websites that don't serve their content as UTF-8 (which is the encoding that .toString()will use if you don't pass it an encoding). Does it happen always, or just with some sites?
至于您的另一个问题，我认为它可能与不将其内容作为 UTF-8 提供的网站有关（.toString()如果您不将其传递给它，则将使用该编码）。它总是发生，还是只是在某些网站上发生？
FWIW, harmonis a middleware for node-http-proxywhich provides a nice way of rewriting responses. It might be an overkill for your situation, but it might also solve your problem.
FWIW，harmon是一个中间件，node-http-proxy它提供了一种很好的重写响应的方式。对于您的情况，这可能是一种矫枉过正，但也可能会解决您的问题。
EDIT:here's a minimal example that seems to work just fine for both posterkoenig.chand www.verkehrsclub.ch(homepages as well as subpages):
编辑：这是一个最小的例子，它似乎适用于posterkoenig.ch和www.verkehrsclub.ch（主页以及子页面）：
var httpProxy = require('http-proxy');
var url = require('url');
httpProxy.createServer(function(req, res, proxy) {
var urlObj = url.parse(req.url);
req.headers.host = urlObj.host;
req.url = urlObj.path;
proxy.proxyRequest(req, res, {
host : urlObj.host,
port : 80,
enable : { xforward: true }
});
}).listen(9000, function () {
console.log("Waiting for requests...");
});
