木星中心配置Http代理问题

Question

我一直在使用木星中心的Configurable Http代理，并且添加了代理处理客户端ssl证书所需的选项，而不必使用命令行选项。

我的主要目标是，我希望接收客户端向代理的请求，并将他们的证书信息添加到标头。在标题中，我将使用jupyterhub的身份验证器来创建用户名。

我的问题是，当我使用http-代理可用的proxy.on('proxyReq方法设置标头时，我得到了以下错误：[Error: Can't set headers after they are sent.]。

我一直在查找所有的代码，以查看在哪里写入或发送响应/请求，但我找不到它。

下面是ConfigurableProxy函数代码，如果需要的话，我可以提供更多：

function ConfigurableProxy (options) {

var that = this;
this.options = options || {};
this.trie = new trie.URLTrie();
this.auth_token = this.options.auth_token;
this.includePrefix = options.includePrefix === undefined ? true : options.includePrefix;
this.routes = {};
this.host_routing = this.options.host_routing;
this.error_target = options.error_target;
if (this.error_target && this.error_target.slice(-1) !== '/') {
    this.error_target = this.error_target + '/'; // ensure trailing /
}
this.error_path = options.error_path || path.join(__dirname, 'error');

if (this.options.default_target) {
    this.add_route('/', {
        target: this.options.default_target
    });
}

options.ws = true;
options.secure= true;
// These are the ssl options

options.ssl = {
    //Right the key and cert are relative path on my computer
    //but these can be changed.
    key: fs.readFileSync('/Users/grantherman/Desktop/jupyterHubCSProject/ssl/server.key'),
    cert: fs.readFileSync('/Users/grantherman/Desktop/jupyterHubCSProject/ssl/server.crt'),
    requestCert: true,
    //Right now this is set to false, but if we add a CA to these options
    // and set this to true, the proxy will reject all unkown ssl certs
    rejectUnauthorized: false
};
var response = [];
var data = [];
var proxy = this.proxy = httpProxy.createProxyServer(options);

proxy.on('proxyReq', function(proxyReq, req, res, options) {
    console.log("proxy request");
    try{
  proxyReq.setHeader('X-Special-Proxy-Header', req.socket.getPeerCertificate());

  }catch(err){
    console.log(err);
    }

});

 proxy.on('data', function(data, req, res, options) {
  data.push(data);
  });

proxy.on('proxyRes', function(proxyRes, req, res, options) {
  response.push(proxyRes);
  });

proxy.on('error', function(error, req, res, options) {
    log.add(error);

});

proxy.on('close', function (req, socket, head) {
  // view disconnected websocket connections
  console.log('Client disconnected');
});


// tornado-style regex routing,
// because cross-language cargo-culting is always a good idea

this.api_handlers = [
    [ /^\/api\/routes(\/.*)?$/, {
        get : bound(this, authorized(this.get_routes)),
        post : json_handler(bound(this, authorized(this.post_routes))),
        'delete' : bound(this, authorized(this.delete_routes))
    } ]
];

Answer 1

我认为这将需要修改可配置-http-代理本身。在启动代理请求这里之前，添加标头的位置位于原始的这里对象上。

它看起来应该是：

ConfigurableProxy.prototype.handle_proxy = function (kind, req, res) {
    ...
    req.headers['X-My-Header'] = 'My-Value';
    // dispatch the actual method
    this.proxy[kind].apply(this.proxy, args);

在CHP中添加一个钩子，以便在此修改请求，应该可以在不修改CHP源代码的情况下完成此操作。