Pana / Wga
Licence: mit
Wrapper for generator and async/await to enable them use in Express or restify
Stars: ✭ 17
Programming Languages
javascript
184084 projects - #8 most used programming language
wga
wga is a small JS function which can wrap a generator or async function to used as request handlers or middleware in Express. wga brought modern async write style to Express
Installing
npm install wga --save
Using with generator
var wga = require("wga")
var app = require("express")()
app.get("/books", wga(function*(req, res, next) {
var books = yield Book.findAll()
res.send(books)
}))
If any error been throwed out, they will be passed to next
, which in
Express's case calls the error handling middleware later on.
If the generator succeeds, the next
callback will not be called.
If you need to, like in middleware handlers, you can always call next
yourself:
app.use(wga(function*(req, res, next) {
var user = yield User.find(req.session.userId)
if (user == null) return next(new Error("Unauthorized"))
req.user = user
next()
}))
Using with async function
app.use(wga(async function(req, res, next) {
var user = await User.find(req.session.userId)
if (user == null) return next(new Error("Unauthorized"))
req.user = user
next()
}))
app.get('/', wga(async function (req, res) {
let result = await Promise.resolve('Hello world')
res.send(`${result}\n`)
}))
License
MIT
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