Cover
简介...
Basic Usage
var cover = require( 'node-cover' );
var app = cover();
var fs = require( 'fs' );
var thunkify = require( 'thunkify' );
var readFile = thunkify( fs.readFile );
// connect 中间件
app.use( function( req, res, next ){
console.log( req.url );
next();
} );
// koa 中间件
app.use( function *( req, res, next ){
yield next;
} );
app.use( function *( req, res, next ){
var fileContent = yield readFile( './test.txt', 'utf-8' );
res.end( fileContent );
} );
app.listen( 8000 );
全局的错误事件
var cover = require( 'node-cover' );
var app = require( 'app' );
// normal function
app.use( function( req, res, next ) {
throw new Error( 'this is an error' );
} );
// or generator
app.use( function *( req, res, bext ){
throw new Error( 'this is an error' );
} )
app.on( 'error', function( error ){
console.log( error.message, error.stack );
) };
app.listen( 8000 );
在中间件中捕获错误
connect式的中间件
app.use( function *( req, res, next ){
try {
yield next
} catch ( e ) {
console.log( e )
}
} );
app.use( function( req, res, next ){
throw new Error( 'this is an error' );
} );
koa式的中间件
app.use( function *( req, res, next ){
try {
yield next;
} catch( e ) {
console.log( e );
}
} );
app.use( function *( req, res, next ){
throw new Error( 'this is an error' );
} )