express-unless

Conditionally skip a middleware when a condition is met.当满足条件时，有条件地跳过中间件。

Install安装

npm i express-unless --save

Usage用法

With existing middlewares:对于现有中间件：

var { unless } = require("express-unless");

var static = express.static(__dirname + "/public");
static.unless = unless;

app.use(static.unless({ method: "OPTIONS" }));

If you are authoring a middleware you can support unless as follow:如果您正在创作中间件，您可以支持，除非如下所示：

var { unless } = require("express-unless");

module.exports = function (middlewareOptions) {
  var mymid = function (req, res, next) {};

  mymid.unless = unless;

  return mymid;
};

Current options当前选项

• method it could be an string or an array of strings. 它可以是字符串或字符串数组。If the request method match the middleware will not run.如果请求方法匹配，中间件将不会运行。
• path it could be an string, a regexp or an array of any of those. 它可以是字符串、正则表达式或其中任何一个的数组。It also could be an array of object which is url and methods key-pairs. 它也可以是一个对象数组，即url和方法键对。If the request path or path and method match, the middleware will not run. 如果请求路径或路径与方法匹配，中间件将不会运行。Check Examples for usage.查看示例了解用法。
• ext it could be an string or an array of strings. 它可以是字符串或字符串数组。If the request path ends with one of these extensions the middleware will not run.如果请求路径以这些扩展之一结束，中间件将不会运行。
• custom it must be a function that accepts req and returns true / false. 它必须是一个接受req并返回true/false的函数。If the function returns true for the given request, the middleware will not run.如果给定请求的函数返回true，则中间件将不会运行。
• useOriginalUrl it should be true or false, default is true. 它应该是true或false，默认值为true。if false, path will match against req.url instead of req.originalUrl. 如果为false，则path将与req.url而不是req.originalUrl匹配。Please refer to Express API for the difference between req.url and req.originalUrl.请参阅Express API以了解req.url和req.originalUrl之间的区别。

Examples示例

Require authentication for every request unless the path is index.html.要求对每个请求进行身份验证，除非路径是index.html。

app.use(
  requiresAuth.unless({
    path: ["/index.html", { url: "/", methods: ["GET", "PUT"] }],
  })
);

Avoid a fstat for request to routes doesnt end with a given extension.避免fstat，因为路由请求不会以给定的扩展名结束。

app.use(
  static.unless(function (req) {
    var ext = url.parse(req.originalUrl).pathname.substr(-4);
    return !~[".jpg", ".html", ".css", ".js"].indexOf(ext);
  })
);

License许可证

MIT 2014 - Jose Romaniello