从快速中间件排除路由

即使expressjs中没有内置的中间件过滤器系统，您也可以通过至少两种方法来实现。

第一种方法是将所有要跳过的中间件（包括否定查找）挂载到正则表达式路径：

// Skip all middleware except rateLimiter and proxy when route is /example_routeapp.use(//((?!example_route).)*/, app_lookup);app.use(//((?!example_route).)*/, timestamp_validator);app.use(//((?!example_route).)*/, request_body);app.use(//((?!example_route).)*/, checksum_validator);app.use(rateLimiter);app.use(//((?!example_route).)*/, whitelist);app.use(proxy);

第二种方法（可能更易读和更简洁）是使用小的辅助函数包装中间件：

var unless = function(path, middleware) {    return function(req, res, next) {        if (path === req.path) { return next();        } else { return middleware(req, res, next);        }    };};app.use(unless('/example_route', app_lookup));app.use(unless('/example_route', timestamp_validator));app.use(unless('/example_route', request_body));app.use(unless('/example_route', checksum_validator));app.use(rateLimiter);app.use(unless('/example_route', whitelist));app.use(proxy);

如果您需要比简单功能更强大的路由匹配

path === req.path

UPDATE：

express 4.17

req.path

req.baseUrl

var unless = function(path, middleware) {    return function(req, res, next) {        if (path === req.baseUrl) { return next();        } else { return middleware(req, res, next);        }    };};