基于 Koa平台Node.js开发的KoaHub.js的跳过组件代码

2022-11-21 18:41:18

koahub-skip

koahub skip middleware

Conditionally skip a middleware when a condition is met.

npm i koahub-skip --save

With existing middlewares:

var skip = require('koahub-skip');

var serve = require('koa-static');

var static = serve(__dirname + '/public');

static.skip = skip;

app.use(static.skip({ method: 'OPTIONS' }));

If you are authoring a middleware you can support skip as follow:

module.exports = function () {

var mymid = function *(next) {

// Do something

};

mymid.skip = require('koahub-skip');

return mymid;

};

method it could be an string or an array of strings. If the request method match the middleware will not run.
path it could be an string, a regexp or an array of any of those. If the request path match, the middleware will not run.
ext it could be an string or an array of strings. If the request path ends with one of these extensions the middleware will not run.
custom it must be a function that returns true / false. If the function returns true for the given request, ithe middleware will not run. The function will have access to Koa's context via this
useOriginalUrl it should be true or false, default is true. if false, path will match against ctx.url instead of ctx.originalUrl.

Require authentication for every request skip the path is index.html.

app.use(requiresAuth().skip({ path: ['/index.html', '/'] }))

Avoid a fstat for request to routes doesnt end with a given extension.

app.use(static.skip(function () {

var ext = url.parse(this.originalUrl).pathname.substr(-4);

return !~['.jpg', '.html', '.css', '.js'].indexOf(ext);

}));