Express

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Express
EPAM RD Lab FE > FE Stream

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Leonid Nord
Software Engineer
Mail:
[email protected]
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Regulations
6 lectures
3 homework assignments
Questions anytime
Initiative and involvement (Write to chat or raise
your hand)
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Module overview
Node.js Intro, NPM, standard libraries;
Express.js framework;
Authorization, Authentication;
Homework assignment №1;
Databases, MongoDB;
Advanced MongoDB;
Building APIs, REST API, MVC;
Homework assignment №2;
Deploy, Docker;
Testing, code quality;
Files, Streams, 3rd party services, Email;
Socket.IO;
Homework assignment №3.
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Agenda
QA
Modern WEB overview
Web architecture, Http
HTTP module
Express.js
QA
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Q&A
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Client-server architecture
• Client/server architecture is a
producer/ consumer computing
architecture where the server acts as
the producer and the client as a
consumer.
• The server houses and provides highend, computing-intensive services to
the client on demand.
• These services can include application
access, storage, file sharing, printer
access and/or direct access to the
server’s raw computing power.
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Client-server architecture
Client/server architecture works
when the client computer sends a
resource or process request to the
server over the network connection,
which is then processed and
delivered to the client.
A server computer can manage
several clients simultaneously,
whereas one client can be connected
to several servers at a time, each
providing a different set of services.
In its simplest form, the internet is
also based on client/server
architecture where web servers serve
many simultaneous users with
website data.
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Modern web applications
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MPA vs SPA
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MPA vs SPA
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HTTP
The Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypermedia information
systems.
This is the foundation for data communication for the World Wide Web (i.e. internet) since 1990.
HTTP is a generic and stateless protocol which can be used for other purposes as well using extensions of its request
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URI and URL
Uniform Resource Identifier AND Uniform Resource Locator (Browser)
A Uniform Resource Identifier (URI) provides a
simple and extensible means for identifying a
resource (straight from RFC 3986). It’s just an
identifier; don’t overthink it.
A URI is an identifier.
A URL is an identifier that tells you how
to get to it.
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Mime types
.css - text/css
.csv - text/csv
.gif - image/gif
.html - text/html
.js - text/javascript
.json - application/json
.txt - text/plain
.xml - application/xml Url encoded - application/x-www-form-urlencoded
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Q&A
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THANK YOU
FOR ATTENTION!