KoaHub平台基于Node.js开发的Koa的skip插件代码详情
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koahub-skip
koahub skip middleware
koahub skip
Conditionally skip a middleware when a condition is met.
Install
npm i koahub-skip --save
Usage
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; };
Current options
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 returnstrue
/false
. If the function returns true for the given request, ithe middleware will not run. The function will have access to Koa‘s context viathis
useOriginalUrl
it should betrue
orfalse
, default istrue
. if false,path
will match againstctx.url
instead ofctx.originalUrl
.
Examples
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); }));
wemall地址:http://www.wemallshop.com
代码地址:http://js.koahub.com/home/feature/koahub-skip
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