[英]Async call inside node.js middleware?
我需要通過查看redis數據庫中的會話並進行驗證來檢查身份,如果我在異步函數內部傳遞返回類型時得到一個不確定的返回值,那么該值是否需要異步調用。
req.isAuthenticated = function() {
var cookies;
if(this.headers.cookie) {
var secrets = require('./config/secrets');
cookies = cookie.parse(this.headers.cookie);
}
// TODO: Maybe figure out how to use this once
var redisSessionClient = redis.createClient({host:'redis://127.0.0.1/0'});
// if PHP generated a cookie
if(cookies['PHPSESSID']) {
// get the client PHP cookie id
var sid = cookieParser.signedCookie(cookies['PHPSESSID'], secrets.sessionSecret);
// get session information inside redis database
redisSessionClient.get('my_session:'+sid, function(err, session, callback) {
if(err)
console.log("error : "+err);
return err;
var serializedSession = PHPUnserialize.unserializeSession(session);
if(serializedSession._sf2_attributes._security_main) {
console.log('should return true');
return true; // I want to return here!
} else {
console.log('should return false');
return false; // I want to return here!
}
});
console.log('redisSessionClient is async cant return inside that block');
// THIS IS BAD, BUT A TEMP HACK, NEED TO CHECK REDIS FIRST BUT ITS ASYNC
// THIS MEANS AS LONG AS THERE IS A COOKIE WITH THE NAME PHPSESSID THE USER
// CAN ACCESS LOGGED IN STUFF, THE CONDITION ABOVE READS THE SESSION FROM
// THE REDIS SESSION STORE AND MAKE SURE THE COOKIE HAS A PARTICULAR VALUE
return false;
} else {
console.log('should return false')
return false;
}
};
更新:
req.isAuthenticated = function() {
var cookies, self = this;
if(this.headers.cookie) {
var secrets = require('./config/secrets');
cookies = cookie.parse(this.headers.cookie);
}
// TODO: Maybe figure out how to use this once
var redisSessionClient = redis.createClient({host:'redis://127.0.0.1/0'});
// if PHP generated a cookie
if(cookies['PHPSESSID']) {
// get the client PHP cookie id
var sid = cookieParser.signedCookie(cookies['PHPSESSID'], secrets.sessionSecret);
// get session information inside redis database
function doCall(callback) {
redisSessionClient.get('my_Sess:'+sid, function(err, session) {
if(err) {
console.log("error : "+err);
return;
}
var serializedSession = PHPUnserialize.unserializeSession(session);
if(serializedSession._sf2_attributes._security_main) {
console.log('should return true');
return callback(true);
} else {
console.log('should return false');
return callback(false);
}
});
}
doCall(function(response){
return response;
});
} else {
console.log('should return false')
return false;
}
};
這是完整的解決方案https://jsfiddle.net/Lytsp8e2/1/
req.isAuthenticated = function(cb) {
// ..........
if(serializedSession._sf2_attributes._security_main) {
console.log('should return true');
cb(true); // I want to return here!
} else {
console.log('should return false');
cb(false); // I want to return here!
}
也
if(err)
console.log("error : "+err);
return err;
應該
if(err) {
console.log("error : "+err);
return err;
}
這是完整的解決方案https://jsfiddle.net/Lytsp8e2/2/,保留了大多數編碼。
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