如何在Express 4.x中链接路由控制器
How do I chain route controllers together in Express 4.x?
所以，我使用express。我想使用next()将控制器连接在一起。
我有三个。他们做不同的事情，我想把他们混搭在一起。如果checkEmailVerification是坏的，则进入失败页面，如果是好的则进入next()。其他两个紧随其后()。completeE()将把它全部包起来。
app.core.users.checkEmailVerification,
app.core.users.processVerification,
app.mean.subscribeMarketingEmails,
app.core.users.completeEmailVerification
我的第一个想法是将其表达为:
// Confirm users email
app.route('/auth/confirm/:confirmationCode').get(
function(req, res, next) {
app.core.stack(req, res, next, [
app.core.users.checkEmailVerification,
app.core.users.processVerification,
app.mean.subscribeMarketingEmails
]);
}
);
所以，我写了下面的函数作为对我自己的编程挑战。
它不工作。所以我的两个问题是:
最好的方法是什么?可能已经有专门的东西了。编辑:也许这是它。//确认用户邮件app.route('/身份验证/确认/:confirmationCode ') . get (app.core.users.checkEmailVerification);app.route('/身份验证/确认/:confirmationCode ') . get (app.core.users.processVerification);app.route('/身份验证/确认/:confirmationCode ') . get (app.mean.subscribeMarketingEmails);
你能看到我在代码中错过了什么吗?递归没有更新'current'。输出如下:
谢谢!
// FIXME: this needs work
/**
* Stack req controllers through the use of next()
*
* E.g. app.core.stack(req, res, [
first,
second,
third
])
*
* == more or less ==>
*
* first(req, res, second(req, res, third(req, res)))
*/
core.stack = function(req, res, next, controllers, current) {
// current defaults to 0;
current = current || 0;
console.log('--> Current in stack:'+current);
// Check if something went wrong.
if (current < 0 || current >= controllers.length)
throw "core.stack() parameter current is invalid";
// If this is the last controller. Complete.
if (current == controllers.length-1)
return controllers[current](req, res, next);
// We're in the middle somewhere. Wrap in core.stack().
current++;
function wrap() {
console.log('--> Current in wrapper:'+current);
return core.stack(req, res, controllers, current)
}
return controllers[current](req, res, wrap);
}
--> Current in stack:0
TypeError: Property '1' of object function (req, res, next) {
if (true) {
console.log("checking. Success!");
// process the next action in the route
next();
} else {
// on failure, flash a message.
console.log('Huh. That didn''t work. Login and click the resend verification email link');
}
},, is not a function
at Object.core.stack (/home/michael/scm/mean-core/core.js:47:32)
at Object.handle (/home/michael/scm/writermustwrite.com/app/routes/users.server.routes.js:24:13)
at next_layer (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/route.js:103:13)
at Route.dispatch (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/route.js:107:5)
at c (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:195:24)
at param (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:270:14)
at param (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:282:16)
at Function.proto.process_params (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:298:3)
at next (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:189:19)
at next (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:166:38)
GET /auth/confirm/adsfasdfasdf 500 61ms
--> Current in stack:0
TypeError: Property '1' of object function (req, res, next) {
if (true) {
console.log("checking. Success!");
// process the next action in the route
next();
} else {
// on failure, flash a message.
console.log('Huh. That didn''t work. Login and click the resend verification email link');
}
},, is not a function
at Object.core.stack (/home/michael/scm/mean-core/core.js:47:32)
at Object.handle (/home/michael/scm/writermustwrite.com/app/routes/users.server.routes.js:24:13)
at next_layer (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/route.js:103:13)
at Route.dispatch (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/route.js:107:5)
at c (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:195:24)
at param (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:270:14)
at param (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:282:16)
at Function.proto.process_params (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:298:3)
at next (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:189:19)
at next (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:166:38)
--> Current in stack:0
TypeError: Property '1' of object function (req, res, next) {
if (true) {
console.log("checking. Success!");
// process the next action in the route
next();
} else {
// on failure, flash a message.
console.log('Huh. That didn''t work. Login and click the resend verification email link');
}
},, is not a function
at Object.core.stack (/home/michael/scm/mean-core/core.js:47:32)
at Object.handle (/home/michael/scm/writermustwrite.com/app/routes/users.server.routes.js:24:13)
at next_layer (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/route.js:103:13)
at Route.dispatch (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/route.js:107:5)
at c (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:195:24)
at param (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:270:14)
at param (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:282:16)
at Function.proto.process_params (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:298:3)
at next (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:189:19)
at next (/home/michael/scm/writermustwrite.com/node_modules/express/lib/router/index.js:166:38)
对于这个错误，您可以调试(https://github.com/node-inspector/node-inspector)，看看控制器函数内部发生了什么。
对于逻辑，我认为你错过了第一个控制器调用，因为current++在控制器[current]之前，所以你永远不会调用第一个控制器。
对于解决方案，您可以为同一路径添加多个路由处理程序。next变量指向同一路由的下一个处理程序。因此，您可以使用更简化的代码实现相同的功能。
app.route('/auth/confirm/:confirmationCode')
.get(app.core.users.checkEmailVerification)
.get(app.core.users.processVerification)
.get(app.mean.subscribeMarketingEmails);
或者
app.route('/auth/confirm/:confirmationCode').get(
app.core.users.checkEmailVerification,
app.core.users.processVerification,
app.mean.subscribeMarketingEmails);
控制器函数将被传递req, res和next对象
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