Question

我一直在使用Jupyterhub的可配置Http代理，我一直在为代理添加必要的选项来处理客户端的ssl证书，而不必使用命令行选项。

我的主要目标是我想向代理接收客户端请求并将其证书信息添加到标头中。一旦进入标题，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方法来设置标头时，我收到此错误：[Error: Can't set headers after they are sent.]

我一直在查看代码以查看响应/请求的编写或发送位置，但我找不到它。

这是ConfigurableProxy功能代码，如果需要，我可以给你更多：

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

我认为这需要修改可配置的http-proxy本身。在启动代理请求here之前，添加标头的位置位于原始req对象上。

看起来像是：

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);

在此过程中，在CHP中添加一个用于修改请求的挂钩应该可以在不修改CHP源的情况下实现这一点。

Jupyterhub可配置的Http代理问题

1 个答案: