signalr - ОБМЕН СООБЩЕНИЯМИ В РЕАЛЬНОМ ВРЕМЕНИ
DESCRIPTION
Поговорим об относительно новой библиотеке, разработанной Дэвидом Фаулером и Дамьеном Эдвардсом, основной задачей которой является мгновенный обмен сообщениями в Web приложениях, написанных на платформе .NetTRANSCRIPT
Содержание
Мгновенный обмен сообщениями
Заключение
Основные компоненты SignalR
Простой пример общего чата
Немножко истории
Как SignalR работает?
Приватный чат за 10 мин
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Основные компоненты SignalR
4 Какие еще есть варианты?
Мгновенный обмен сообщениями
Система мгновенного обмена сообщениями, Система обмена мгновенными сообщениями (англ. Instant messaging, IM) — службы мгновенных сообщений (Instant Messaging Service, IMS) и программы-клиенты (Instant Messenger, IM) для обмена сообщениями в реальном времени черезИнтернет.
Немножко истории
Demian EdwardsDavid Fowler
David Fowler joined Microsoft as a developer on the ASP.NET team in 2008. Before that he did two internships at Microsoft as a tester and a developer. He's originally from Barbados and went to college in Florida.
Originally from Australia, Damian Edwards is a senior program manager on the ASP.NET team where he looks after the ASP.NET core and web forms. Before joining Microsoft, Damian was an ASP.NET MVP. He's a huge fan of Javascript and jQuery.
• JabbR - Real time chat application [SignalR + PNotify = Real Time Push Notifications] POC (Link)• Umbraco Now - realtime activity map of community activity• LoggR - Real time web app monitoring• WorkFu - Opportunities that find you (how WorkFu was built)• HushFlow - Private discussion board for teams• HurricaneJs - HTML5/SignalR/.NET game server and engine.• Lege.no - Chat with doctor online (Norwegian)• Compilify.net - Compile and execute .NET from your web browser.• ElmahR - ElmahR = ELMAH + SignalR, real time error notification dashboard.• NodeAssets - Asset management solution that uses SignalR to push css updates as you are changing it• DIWICON AURA - Indoor positioning system with panic messages.• Adopt Him - Romantic social network built around SignalR. Real time user interactions and chat. Finding love has never
been so instant.• Fixposit - Allows groups of users to share their location with eachother in real time on a google map.• Postworthy - Real time content curation tool. (source code)• LiveTiming/TimeService - Real time racetrack monitor for some BeNeLux racetracks, including TT Assen SuperBike track• bromelard - Offers a unique platform for global online sharing of geographical listings• ShootR - Multiplayer space shooter game (work in progress).• InspectB.in - Test remote http clients and webhooks. Point to your InspectBin url and start inspecting.• SRChat - A chat application using SignalR ## SignalR Clients• SignalR-ObjC - An iOS/Mac SignalR Client
Основные компоненты SignalR
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Какие еще есть варианты?
Плюсы по сравнению с Polling:— Минимальное количество запросов— Высокая временная точность событий— Сервер хранит события только на время реконнектаМинусы по сравнению с Polling:— Более сложная схема
Long PollingPolling
Плюсы по сравнению с Long Polling:— Поднимается одно соединение— Предельно высокая временная точность событий— Управление сетевыми сбоями контролирует браузерМинусы по сравнению с Long Polling:— HTTP не совместимый протокол, нужен свой сервер, усложняется отладка
Web Sockets
Плюсы:— Просто— Данные могут быть пожатыМинусы:— Очень много лишних запросов— События всегда приходят с опозданием— Серверу приходится хранить события пока клиент не заберет их или пока они не устареют
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Как SignalR работает
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