Effectively Use WebSockets In Golang

https://solaceinfotech.com/blog/wp-content/uploads/2020/12/How-To-Effectively-Use-WebSockets-In-Golang-720x349.jpg
In the past days, there is a big challenge for developers to allow real-time functionality. But now WebSockets have come as a solution to the issue and made it easy to create an interactive session between server and browser of user. WebSockets allows browser to send messages to the server and get event-driven responses. There is no necessity to have to poll the server for a reply.

Now websockets are the best solution to develop real time applications, tracking apps, instant messengers, online games and so on. Here we’ll give a step by step guide of how to build websockets apps in golang language. Let’s get started.

What Are WebSockets?

WebSockets are upgraded HTTP connections that continue until the client or the server ends the connection. WebSocket communication protocol provides a full-duplex communication channel over a single TCP connection. As opposite to HTTPs, Websockets don’t need to send request to get a response. They enables bidirectional data flow, so you can wait only for server to respond. It’ll send you a message when it is available. Websockets are a great solution for services which need continuous data exchange like, instant messaging apps, online games and real-time trading systems. Browsers request WebSocket connections and are responded to by servers after which a connection is established.

This process is called as handshake. The special header in WebSockets needs just a single handshake between a browser and server for setting up a connection that will be active all through its lifetime. WebSockets solves many issues of real time web development and have some benefit over traditional HTTP.

Only one TCP connection is needed for single web client.
Websocket server can push data to web clients.
Lightweight header reduces data transmission overhead.
WebSocket Libraries-
1. GOWebsockets-
It offers a wide range of easy-to-use features and allows concurrency control, data compression, and setting request headers. This tools supports subprotocols for emitting and receiving text and binary data. Also developers can enable or disable SSL verification.

Client side:

// init
// schema – can be ws or wss
// host, port – ws server
socket := gowebsocket.New({schema}://{host}:{port})
socket.Connect()
    .......  
// send message
socket.SendText({message})
or
socket.SendBinary({message})
    .......
// receive message
socket.OnTextMessage = func(message string, socket gowebsocket.Socket) 

{
// handle received message
};
or
socket.OnBinaryMessage = func(data [] byte, socket gowebsocket.Socket) {
// handle received message
};

Server side:

// init
// schema – can be ws or wss
// host, port – ws server
conn, _, _, err := ws.DefaultDialer.Dial(ctx, {schema}://{host}:{port})
if err != nil {
    // handle error
}
    ....... 
// send message
err = wsutil.WriteClientMessage(conn, ws.OpText, {message})
if err != nil {
    // handle error
       }
    .......    
   // receive message       

msg, _, err := wsutil.ReadServerData(conn)
if err != nil {
// handle error
}
2. GOBWAS-
It is a small WebSocket package which has strong features such as a low-level API that allows to develop the logic of custom packet handling and a zero-copy upgrade. It doesn’t need intermediate allocations during I/O. Also it boasts high-level wrappers and helpers around the API in the WsUtil package, allowing developers to rapidly start without digging into the internals of the protocol. In spite of the fact that this library includes a flexible API, it comes at the cost of clarity and usability.

3. GORILLA-
The WebSocket package in Gorilla web toolkit helps to complete and test implementation of the WebSocket protocol and also a stable package API. It is easy to use and well documented.

How To Build A WebSocket App In Golang?
Step 1: Initiate A Handshake-
Initially, create an HTTP handler with a WebSocket endpoint:

// HTTP server with WebSocket endpoint
func Server() {
http.HandleFunc(“/”, func(w http.ResponseWriter, r *http.Request) {
ws, err := NewHandler(w, r)
if err != nil {
// handle error
}
if err = ws.Handshake(); err != nil {
// handle error
}

Then, run the WebSocket structure.

Client always send first handshake request. Once the server has authenticated a WebSocket request, it needs to reply with a handshake response. Always keep in mind that you one cannot rite response using http.ResponseWriter, because it will disconnect the basic TCP connection if start to send the response. So you must use HTTP Hijacking that allows you to take over the underlying TCP connection handler and bufio.Writer. This allows you to read and write data without preventing the TCP connection.

// NewHandler initializes a new handler
func NewHandler(w http.ResponseWriter, req http.Request) (WS, error) {
hj, ok := w.(http.Hijacker)
if !ok {
// handle error
}
……
}
To complete the handshake, server should respond with relevant headers.

// Handshake creates a handshake header
func (ws *WS) Handshake() error {
hash := func(key string) string {
h := sha1.New()
h.Write([]byte(key))
h.Write([]byte(“258EAFA5-E914-47DA-95CA-C5AB0DC85B11”))
return base64.StdEncoding.EncodeToString(h.Sum(nil))
}(ws.header.Get(“Sec-WebSocket-Key”))

}
“Sec-WebSocket-key” is generated randomly and is Base64-encoded. Once the request is accepted, server should add this key to a fixed string. Assume that you have the x3JJHMbDL1EzLkh9GBhXDw== key.

In this case, you can use SHA-1 for binary value computing and Base64 for encoding it. You will get HSmrc0sMlYUkAGmm5OPpG2HaGWk=. Use this as value of Sec-WebSocket-Accept response header.

Step 2- Transfer Data Frames-
Know more at - https://solaceinfotech.com/blog/how-to-effectively-use-websockets-in-golang/

#golang #websockets #apps #web

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Effectively Use WebSockets In Golang

Why Use WordPress? What Can You Do With WordPress?

Can you use WordPress for anything other than blogging? To your surprise, yes. WordPress is more than just a blogging tool, and it has helped thousands of websites and web applications to thrive. The use of WordPress powers around 40% of online projects, and today in our blog, we would visit some amazing uses of WordPress other than blogging.
What Is The Use Of WordPress?

WordPress is the most popular website platform in the world. It is the first choice of businesses that want to set a feature-rich and dynamic Content Management System. So, if you ask what WordPress is used for, the answer is – everything. It is a super-flexible, feature-rich and secure platform that offers everything to build unique websites and applications. Let’s start knowing them:

1. Multiple Websites Under A Single Installation
WordPress Multisite allows you to develop multiple sites from a single WordPress installation. You can download WordPress and start building websites you want to launch under a single server. Literally speaking, you can handle hundreds of sites from one single dashboard, which now needs applause.
It is a highly efficient platform that allows you to easily run several websites under the same login credentials. One of the best things about WordPress is the themes it has to offer. You can simply download them and plugin for various sites and save space on sites without losing their speed.

2. WordPress Social Network
WordPress can be used for high-end projects such as Social Media Network. If you don’t have the money and patience to hire a coder and invest months in building a feature-rich social media site, go for WordPress. It is one of the most amazing uses of WordPress. Its stunning CMS is unbeatable. And you can build sites as good as Facebook or Reddit etc. It can just make the process a lot easier.
To set up a social media network, you would have to download a WordPress Plugin called BuddyPress. It would allow you to connect a community page with ease and would provide all the necessary features of a community or social media. It has direct messaging, activity stream, user groups, extended profiles, and so much more. You just have to download and configure it.
If BuddyPress doesn’t meet all your needs, don’t give up on your dreams. You can try out WP Symposium or PeepSo. There are also several themes you can use to build a social network.

3. Create A Forum For Your Brand’s Community
Communities are very important for your business. They help you stay in constant connection with your users and consumers. And allow you to turn them into a loyal customer base. Meanwhile, there are many good technologies that can be used for building a community page – the good old WordPress is still the best.
It is the best community development technology. If you want to build your online community, you need to consider all the amazing features you get with WordPress. Plugins such as BB Press is an open-source, template-driven PHP/ MySQL forum software. It is very simple and doesn’t hamper the experience of the website.
Other tools such as wpFoRo and Asgaros Forum are equally good for creating a community blog. They are lightweight tools that are easy to manage and integrate with your WordPress site easily. However, there is only one tiny problem; you need to have some technical knowledge to build a WordPress Community blog page.

4. Shortcodes
Since we gave you a problem in the previous section, we would also give you a perfect solution for it. You might not know to code, but you have shortcodes. Shortcodes help you execute functions without having to code. It is an easy way to build an amazing website, add new features, customize plugins easily. They are short lines of code, and rather than memorizing multiple lines; you can have zero technical knowledge and start building a feature-rich website or application.
There are also plugins like Shortcoder, Shortcodes Ultimate, and the Basics available on WordPress that can be used, and you would not even have to remember the shortcodes.

5. Build Online Stores
If you still think about why to use WordPress, use it to build an online store. You can start selling your goods online and start selling. It is an affordable technology that helps you build a feature-rich eCommerce store with WordPress.
WooCommerce is an extension of WordPress and is one of the most used eCommerce solutions. WooCommerce holds a 28% share of the global market and is one of the best ways to set up an online store. It allows you to build user-friendly and professional online stores and has thousands of free and paid extensions. Moreover as an open-source platform, and you don’t have to pay for the license.
Apart from WooCommerce, there are Easy Digital Downloads, iThemes Exchange, Shopify eCommerce plugin, and so much more available.

6. Security Features
WordPress takes security very seriously. It offers tons of external solutions that help you in safeguarding your WordPress site. While there is no way to ensure 100% security, it provides regular updates with security patches and provides several plugins to help with backups, two-factor authorization, and more.
By choosing hosting providers like WP Engine, you can improve the security of the website. It helps in threat detection, manage patching and updates, and internal security audits for the customers, and so much more.

Read More

#use of wordpress #use wordpress for business website #use wordpress for website #what is use of wordpress #why use wordpress #why use wordpress to build a website

Effectively Use WebSockets In Golang

https://solaceinfotech.com/blog/wp-content/uploads/2020/12/How-To-Effectively-Use-WebSockets-In-Golang-720x349.jpg
In the past days, there is a big challenge for developers to allow real-time functionality. But now WebSockets have come as a solution to the issue and made it easy to create an interactive session between server and browser of user. WebSockets allows browser to send messages to the server and get event-driven responses. There is no necessity to have to poll the server for a reply.

Now websockets are the best solution to develop real time applications, tracking apps, instant messengers, online games and so on. Here we’ll give a step by step guide of how to build websockets apps in golang language. Let’s get started.

What Are WebSockets?

WebSockets are upgraded HTTP connections that continue until the client or the server ends the connection. WebSocket communication protocol provides a full-duplex communication channel over a single TCP connection. As opposite to HTTPs, Websockets don’t need to send request to get a response. They enables bidirectional data flow, so you can wait only for server to respond. It’ll send you a message when it is available. Websockets are a great solution for services which need continuous data exchange like, instant messaging apps, online games and real-time trading systems. Browsers request WebSocket connections and are responded to by servers after which a connection is established.

This process is called as handshake. The special header in WebSockets needs just a single handshake between a browser and server for setting up a connection that will be active all through its lifetime. WebSockets solves many issues of real time web development and have some benefit over traditional HTTP.

Only one TCP connection is needed for single web client.
Websocket server can push data to web clients.
Lightweight header reduces data transmission overhead.
WebSocket Libraries-
1. GOWebsockets-
It offers a wide range of easy-to-use features and allows concurrency control, data compression, and setting request headers. This tools supports subprotocols for emitting and receiving text and binary data. Also developers can enable or disable SSL verification.

Client side:

// init
// schema – can be ws or wss
// host, port – ws server
socket := gowebsocket.New({schema}://{host}:{port})
socket.Connect()
    .......  
// send message
socket.SendText({message})
or
socket.SendBinary({message})
    .......
// receive message
socket.OnTextMessage = func(message string, socket gowebsocket.Socket) 

{
// handle received message
};
or
socket.OnBinaryMessage = func(data [] byte, socket gowebsocket.Socket) {
// handle received message
};

Server side:

// init
// schema – can be ws or wss
// host, port – ws server
conn, _, _, err := ws.DefaultDialer.Dial(ctx, {schema}://{host}:{port})
if err != nil {
    // handle error
}
    ....... 
// send message
err = wsutil.WriteClientMessage(conn, ws.OpText, {message})
if err != nil {
    // handle error
       }
    .......    
   // receive message       

msg, _, err := wsutil.ReadServerData(conn)
if err != nil {
// handle error
}
2. GOBWAS-
It is a small WebSocket package which has strong features such as a low-level API that allows to develop the logic of custom packet handling and a zero-copy upgrade. It doesn’t need intermediate allocations during I/O. Also it boasts high-level wrappers and helpers around the API in the WsUtil package, allowing developers to rapidly start without digging into the internals of the protocol. In spite of the fact that this library includes a flexible API, it comes at the cost of clarity and usability.

3. GORILLA-
The WebSocket package in Gorilla web toolkit helps to complete and test implementation of the WebSocket protocol and also a stable package API. It is easy to use and well documented.

How To Build A WebSocket App In Golang?
Step 1: Initiate A Handshake-
Initially, create an HTTP handler with a WebSocket endpoint:

// HTTP server with WebSocket endpoint
func Server() {
http.HandleFunc(“/”, func(w http.ResponseWriter, r *http.Request) {
ws, err := NewHandler(w, r)
if err != nil {
// handle error
}
if err = ws.Handshake(); err != nil {
// handle error
}

Then, run the WebSocket structure.

Client always send first handshake request. Once the server has authenticated a WebSocket request, it needs to reply with a handshake response. Always keep in mind that you one cannot rite response using http.ResponseWriter, because it will disconnect the basic TCP connection if start to send the response. So you must use HTTP Hijacking that allows you to take over the underlying TCP connection handler and bufio.Writer. This allows you to read and write data without preventing the TCP connection.

// NewHandler initializes a new handler
func NewHandler(w http.ResponseWriter, req http.Request) (WS, error) {
hj, ok := w.(http.Hijacker)
if !ok {
// handle error
}
……
}
To complete the handshake, server should respond with relevant headers.

// Handshake creates a handshake header
func (ws *WS) Handshake() error {
hash := func(key string) string {
h := sha1.New()
h.Write([]byte(key))
h.Write([]byte(“258EAFA5-E914-47DA-95CA-C5AB0DC85B11”))
return base64.StdEncoding.EncodeToString(h.Sum(nil))
}(ws.header.Get(“Sec-WebSocket-Key”))

}
“Sec-WebSocket-key” is generated randomly and is Base64-encoded. Once the request is accepted, server should add this key to a fixed string. Assume that you have the x3JJHMbDL1EzLkh9GBhXDw== key.

In this case, you can use SHA-1 for binary value computing and Base64 for encoding it. You will get HSmrc0sMlYUkAGmm5OPpG2HaGWk=. Use this as value of Sec-WebSocket-Accept response header.

Step 2- Transfer Data Frames-
Know more at - https://solaceinfotech.com/blog/how-to-effectively-use-websockets-in-golang/

#golang #websockets #apps #web

Hire Dedicated Golang Developers | Golang Web Development Company

Does your business need a robust system across large-scale network servers then developing your app with a Golang programming language is the way to go. Golang is generally used for the development of highly secured, High Speed and High Modularity apps such as a FinTech Industry.

Want to develop a Highly secured app for your business?

Then hire a dedicated Golang developer from WebClues Infotech that are highly skilled in carrying out the work in a timely and qualitative output. With WebClues Infotech you get the assurance that we know what are the customers’ expectations and how to deliver on them on time.

Get your desired Golang Developer based on your project requirement!!

Share your requirements here https://www.webcluesinfotech.com/contact-us/

Book Free Interview with Golang developer: https://bit.ly/3dDShFg

#hire golang developer #hire go language developer #dedicated golang app developers #golang web development company #hire golang developers india #hire expert golang developers

Golang Web Development:Th Best Programming Language in 2020

https://www.mobinius.com/blogs/golang-web-development-company

#golang web development #golang-app-development-company #golang-development-solutions #hire-golang-developers #golang-development-services

Ajay Kapoor

1624960485

Golang vs. Node.JS: Who Trumps the Battle of Backend Frameworks?

Full blog here

The backend of your application is truly the essential part of your product. No matter how much you appreciate the design, the application’s success lies in its backend. A scalable backend that effectively implements the required business logic is the primary goal of programmers.

Therefore, it is crucial to choose the most powerful and scalable technology. There are plenty of languages ​​in the market that can form the backend of any application, Node.js and Golang are the two most popular technologies among them.

They are real and developed languages ​​that have recently been used in various outstanding projects. Golang is an open-source programming language, whereas Node.js is an open-source server framework. They both are gaining popularity for various reasons.

According to a development stat, it is observed that almost 50% out of 58,543 respondents use Node.js as their preferred app development tool.

Golang, on the other hand, has overtaken other programming languages in the application development market and has gained huge recognition over the past few years.

But, which backend framework is best for you? In this article, I’ll make a healthy comparison of two of Google’s most popular backend development tools based on several essential features and various other factors.

Golang developers for hire

#best backend frameworks #node or golang #golang or nodejs #nodejs vs golang #golang vs nodejs #top backend frameworks