Express.js路由重定向错误:发送标头后无法设置标头

时间:2020-01-14 01:08:33

标签: javascript node.js api express fetch

我不确定为什么会收到此错误,“错误:发送标头后无法设置标头”。这是一个基于express.js的简单API,它将检查用户是否已登录,如果用户未登录,则只会将用户带到登录页面。

当您查看以下从fetch(authApiUrl, config)开始的代码时,如果用户已登录,则其状态为200。如果用户未登录,则其状态为401,它将进入进入“ else”语句并启动redirectToAccountSignin(request, response, wwwS);

然后它将进入redirectToAccountSignin函数。到目前为止,当我运行这段代码时,它确实进入了redirectToAccountSignin函数,但是我相信它会在response.redirect(wwwS + '/account/signin?method=initialize&TARGET=' + encodedTargetUrl);上引发错误。

我的“重定向”方法是否存在问题?我究竟做错了什么?有人可以帮我吗?

谢谢。

const fetch = require("node-fetch");
const splunkLogFormat = require('./logUtilities');

function authenticate(request, response, next, successCallback, configuration) {
  // get environment for URL call and grab from environment json
  const appName = !!configuration.appName ? configuration.appName : 'micro-server-app';
  const runtimeEnvironment = !!configuration.environment ? configuration.environment : 'dev';

  const logPreamble = splunkLogFormat(appName, 'authenticate');
  const wwwS = !!environments && !!environments[runtimeEnvironment] && environments[runtimeEnvironment].www_s;

  const authApiUrl = wwwS + '/api/auth/login/check';
  const headers = {
    'Accept': 'application/json',
    'Content-Type': 'application/json',
    cookie: request.headers.cookie
  };
  const method = 'GET';
  const config = { headers, method };
  fetch(authApiUrl, config)
    .then(authResponse => {
      const status = authResponse.status;
      if (status === 200) {
        successCallback(request, response, next);
      } else {
        redirectToAccountSignin(request, response, wwwS);
      }
    })
    .catch(error => {
      redirectToAccountSignin(request, response, wwwS);
    });
};

function redirectToAccountSignin(request, response, wwwS) {
  const hostname = !!request && request.hostname;
  const protocol = 'https://';
  const url = !!request && request.originalUrl;
  const encodedTargetUrl = encodeURIComponent(protocol + hostname + url);

  response.redirect(wwwS + '/account/signin?method=initialize&TARGET=' + encodedTargetUrl);
  response.end();
};

module.exports = authenticate;

1 个答案:

答案 0 :(得分:-1)

确定要在--obfuscate --save-obfuscation-map=<map-filename> 之后使用res.end()吗? https://stackoverflow.com/a/54874227/4208845在那之前你在做什么?