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You want to build a solid web application but you don't want to use express and a lot of packages you need to build a basic website, Grandjs is one framework includes all main functionalities you need to build amazing, solid and secured web application without need for a ton of packages and libraries.
- Grandjs is built for solid and extended web apps
Prerequisites
1- you need to install node.js on your system 2- init a new project using npm, so then we will be able to install this framework
Features
- fewer packages and more productivity
- Framework includes the most needed functionalities to build a perfect web app
- depends on Handlebars template Engine which is friendly with many developers
- solid routing system built on Javascript object-oriented programming and you can extend it as you need
- controlled handling for every error page in your app
- Grandjs is built for solid and extended web apps
//require HTTP module
const http = require("http");
//require Grandjs framework
const Grandjs = require("grandjs");
// set the configuration of the framework
Grandjs.setConfig({
//define the port
port: process.env.PORT || 3000,
// http is optional you can specify http or https, if you don't specify Grandjs automatically require HTTP module
http: http,
// if you specified https so you should ssl files in this object
httpsMode: {
key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem')
}
// define the static files container folder
staticFolder: "public",
//enable the session
session: true,
//set the encryption key, Grandjs uses encription key to cypher info
ENCRYPTION_KEY: "ncryptiontestforencryptionproces",
// set the max age of cookies when you set the session of logged in users
setCookie: {
expires: {
days: 20,
minutes: 30
}
},
//set it true to see the console info while development process
logger: true,
//set error page for global error pages
errorPage(req, res) {
res.end("error page");
}
});
// init Grandjs
Grandjs.initServer();
content
- Installing
- Getting Started
- Built With
- Contributing
- Versioning
- Authors
- License
- Acknowledgments
Installing
open the command prompt and navigate to the project folder and just say
npm install grandjs --save
Getting Started
Server configuration
to start with Grandjs just install it and call it in your file as the following
//require Grandjs framework
const Grandjs = require("grandjs");
if you want to require HTTP or HTTPS module to pass it to Grand js you can, in all cases, Grandjs behind the seen requires HTTP module as a default.
Now you need to call setConfig function to set some configuration for the project
Grandjs.setConfig({});
this function takes one parameter as an object
Example on all configuration
const http = require("http");
const Grandjs = require("Grand");
// define Grandjs configuration
Grandjs.setConfig({
//define the port of the server
port: 3000,
// http is optional you can specify http or https, if you don't specify Grandjs automatically require HTTP module
http: http,
// define the static files container folder
staticFolder: "public",
//enable the session
session: true,
// if you specified https so you should ssl files in this object
httpsMode: {
key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem')
}
//set the encryption key, Grandjs uses encription key to cypher info
ENCRYPTION_KEY: "ncryptiontestforencryptionproces",
// set the max age of cookies when you set the session of logged in users
setCookie: {
expires: {
days: 20,
minutes: 30
}
},
//set it true to see the console info while development process
logger: true,
//set error page for global error pages
errorPage(req, res) {
res.end("error page");
}
})
until now Grandjs doesn't work so you need to call "init function" to initialize the server
Grandjs.initServer();
Router
- Grandjs Routing system is built upon object-oriented programming, so Router is a class inside Grandjs you extend it and add routes to it as you wanna
to work with router class you need to extend it or instatiate it directly and every class implies a group of routes have a specific basename
extend Router class
class HomeRouter extends Grandjs.Router{
constructor(options) {
super(options);
}
}
As any extended class, you should call the super inside the constructor and pass the options parameter
| parameter | type |
|---|---|
| options | Object |
Now after defining the class, you should define the get routers which related to this class Router class has a property called "getRouters" this is an array and you push inside it the routers you add within the class with the GET method
Example
class HomeRouter extends Grandjs.Router{
constructor(options) {
super(options);
this.getRouters = []
}
}
you can add routers which related to this class as methods inside the class and every method you use it as a router it should return an object has the following properties
| Property | type | description |
|---|---|---|
| URL | string (required) | the URL of the router |
| method | string (required) | HTTP method get / post / patch / put / delete |
| handler | function (required) | the function you want to run when the request URL matches the router url |
| middleWares | array (optional) | if you want to run a function or more to check about something before running the final handler of the router |
Define get routers
Example
class HomeRouter extends Grandjs.Router{
constructor(options) {
super(options);
//push the homePage method route into getRouters array
this.getRouters = [this.homePage()];
}
homePage() {
return {
//define the url of router
url: "/",
// define the method of the router
method: "GET",
handler: () => {
// handle the request and do the functionalities
}
}
}
}
Define post routers
Example
class HomeRouter extends Grandjs.Router{
constructor(options) {
super(options);
//push the homePage method route into getRouters array
this.postRouters = [this.homePagePost()];
}
homePagePost() {
return {
//define the url of router
url: "/",
// define the method of the router
method: "POST",
handler: () => {
// handle the request and do the functionalities
}
}
}
}
instantiate router class
Example
class HomeRouter extends Grandjs.Router{
constructor(options) {
super(options);
//push the homePage method route into getRouters array
this.getRouters = [this.homePage()];
}
homePage() {
return {
//define the url of router
url: "/",
// define the method of the router
method: "GET",
handler: () => {
// handle the request and do the functionalities
}
}
}
}
// instantiate the class
const homeRoters = new HomeRouter({});
when you instantiate the class you should define the options parameter as an object includes two properties
| property | type | descriptions |
|---|---|---|
| base | string (required) | implies the base URL you want to add routers to it. so if you defined it as "/admin" all routers inside this class would be added to /admin |
| staticFolder | string(optional) | the name of the folder you want to serve assets and static files from it. The default value of it is the global staticFolder that you specified in setConfig function |
Example
const homeRoters = new HomeRouter({
base: "/"
});
Access on request and response objects
to handle the routers and check requests and responses you need to access them, so these objects are accessible using different ways
1- req & res objects are properties inside the class
Example
class HomeRouter extends Grandjs.Router{
constructor(options) {
super(options);
//push the homePage method route into getRouters array
this.getRouters = [this.homePage()];
}
homePage() {
return {
//define the url of router
url: "/",
// define the method of the router
method: "GET",
handler: () => {
// handle the request and do the functionalities
//request object: this.req
// response object: this.res
//console the request object headers
console.log(this.req.headers);
this.res.end("hello home page");
}
}
}
}
2- request & response are accessable as parameters inside handler function
Example
homePage() {
return {
url: "/",
method: "get",
handler: (req, res) => {
console.log(req.headers);
res.end("hello home page");
}
}
}
Specify a separated folder for static files for this group of routes
const homeRoters = new HomeRouter({
base: "/",
//specify the container folder fo static file for all routes inside this class
staticFolder: "homePublic"
});
Router add route
This function enables you to add routers to the class from outside it
homeRoters.addRoute(obj);
this function takes one (required) parameter as an object has the following properties
| Property | type | description |
|---|---|---|
| URL | string (required) | the URL of the router |
| method | string (required) | HTTP method get / post / patch / put / delete |
| handler | function (required) | the function you want to run when the request URL matches the router url |
| middleWares | array (optional) | if you want to run a function or more to check about something before running the final handler of the router |
Example
const adminRoute = new Grandjs.Router({
baes: "/admin"
})
// add main route to admin base
adminRoute.addRoute({
url: "/",
method: "get",
handler: (req, res) => {
res.end("hello admin");
}
});
// add profile page route to admin base
homePage.addRoute({
url: "/profile",
method: "get",
handler: (req, res) => {
res.end("hello profile");
}
});
Router class errorPage
you can specify a custom error page for every class you instantiate it to control on error links in a group of routes to do that you need to define "errorPage" method to the class
1- define it inside the class
Example
class HomeRouter extends Grandjs.Router{
constructor(options) {
super(options);
}
homePage() {
return {
url: "/",
method: "get",
handler: () => {
this.res.end("hello home page");
}
}
}
aboutPage() {
return {
url: "/about",
method: "get",
handler: () => {
this.res.end("hello about page");
}
}
}
// customize error page
errorPage() {
this.res.end("error page")
}
}
2-Define error page from outside the class
Example
const homeRouter = new Grandjs.Router({
baes: "/"
})
// add main route to admin base
homeRouter.addRoute({
url: "/",
method: "get",
handler: (req, res) => {
res.end("hello homepage");
}
});
// add profile page route to admin base
homeRouter.addRoute({
url: "/about",
method: "get",
handler: (req, res) => {
res.end("hello aboutpage");
}
});
homeRouter.errorPage = (req, res) => {
res.end("error page");
}
*not that if you didn't define error page for the router class it automatically call error page which you specified in setConfig function
Global middleWares
Global middleware is a way to apply middlewares on a class which includes a group of routers
globalMiddleWares is an array inside the class you can define it inside the constructor and put inside it functions that you want to run when the client requests the base name of that class Example
class HomeRouter extends Grandjs.Router{
constructor(options) {
super(options);
// you can add one middleWare or more and it would be applied according to the arrangment
this.globalMiddleWares = [this.sendMessage]
}
sendMessage(req, res, next) {
res.write("message from middleWare");
// continue to the next hanlders
next();
}
homePage() {
return {
url: "/",
method: "get",
handler: () => {
this.res.end("hello home page");
}
}
}
aboutPage() {
return {
url: "/about",
method: "get",
handler: () => {
this.res.end("hello about page");
}
}
}
// customize error page
errorPage() {
this.res.end("error page")
}
}
not that the middlWares array can include many middleWare functions and the middleWares are applied according to the indexing inside the array Every middleWare has three parameters
| parameter | type | description |
|---|---|---|
| req | object | implies the coming request object contains all information about the request |
| res | object | represents the response object |
| next | function | is a function you can execute it to continue to the next middleware or to the final handler of the router |
Router URL define params
you can add params to the URL of the router to make dynamic routes like the following:
url: "/posts/:postId"
to access the parameters inside the URL using request.params property
Example
const homePage = new Grandjs.Router({
baes: "/"
})
home.addRoute({
url: "/posts/:postId",
method: "get",
handler: (req, res) => {
console.log(req.params);
}
});
Request Object
this is an object you can access on it inside the handler of the route and the object contains all information about the request which is coming
| Property | type | description |
|---|---|---|
| req.method | string | returns the method of the current request |
| req.pathname | string | returns the requested URL without query string |
| req.path | string | returns the requested URL with query string |
| req.href | string | returns the requested URL with query string |
| req.url | object | returns object contains the parsed URL |
| req.query | object | contains the query & search in the URL(it parsed as key and value) |
| req.params | object | returns the query parameters if it exists as key and value |
| req.validation | object | returns an object contains some helper functions to validate the email and string |
| req.data | object | returns an object contains the posted data if the method is "post" |
| req.headers | object | returns the headers of the coming request |
| req.flash | object | this object enables you to set messages to send it to handlebars to show to the user |
Request params
returns an object contains the parameters of the router URL and it's value if it exists if there are no params so it returns an empty object
Example
const homePage = new Grandjs.Router({
baes: "/"
})
home.addRoute({
url: "/posts/:category",
method: "get",
handler: (req, res) => {
// user requested http://localhost:300/posts/tech?postId=2
console.log(req.params); //output {category:"tech"};
console.log(req.query) //output {postId: 2}
console.log(req.pathname) //output /posts/tech
console.log(req.path) //output /posts/tech?postId=2
console.log(req.href) //output /posts/tech?postId=2
console.log(req.method) //output "get"
console.log(req.url)
/* output
Url {
protocol: null,
slashes: null,
auth: null,
host: null,
port: null,
hostname: null,
hash: null,
search: '?postId=2',
query: 'postId=2',
pathname: '/posts/tech',
path: '/posts/tech?postId=2',
href: '/posts/tech?postId=2' }
*/
}
});
Handle post request
Grandjs handles all types of post requests and submitted data and returns them as an object called req.data this object contains all the submitted data and you can access on it inside the handler function if the method of the router is post
Example
postAdminPage() {
return {
method: "post",
url: "/admin/addinfo",
handler: (req, res) => {
console.log(req.data) //output {} contains all submitted info
}
}
}
Response Object
this is an object you can access on it inside the handler of the route This object contains all methods that you need to send a response or content to the coming request
res.render function
This function you use it to render HTML content using handlebars template engine
res.render()
takes one parameter as an object, this object should contain the following properties
| property | type | description |
|---|---|---|
| container | string (required) | this property you specify the container folder which includes all handlebars files |
| layout | string (required) | should be the path of the layout file |
| body | string (optional) | should be the path of the body file |
| partials | Array (optional) | every item inside this array should be a string refers to the path of the partial file that you want to append to the layout |
| data | object (optional) | object contains the data you want to render inside the handlbars files |
Example
homePageRouter() {
return {
url: "/",
method: "get",
handler: () => {
// render content using handlebars template engine
this.res.render({
container: "views",
layout: "/layouts/layout.hbs",
body: "/pages/home.hbs"
})
}
}
}
res.write function
this function is like the native api of node.js, it allows you to send strings to the client
res.write("hello world");
//end the response
res.end("");
res.end function
this function is like the native api of node.js, it allows you to send strings to the client
res.end("hello world");
res.sendFile function
res.sendFile(path);
this function takes on parameter
| parameter | type | description |
|---|---|---|
| path | String (required) | this parameter should specify the path of the file which you want to send |
this function uses promise to return a catch function if the file isn't exist
Example
res.sendFile("/views/pages/home.html").catch((err) => {
console.log(err) //output no such file
})
res.json function
this function sends json data, it accepts one parameter this parameter should be an object and Grandjs stringify this object automatically
res.json({user: "tarek", email: "test@gmail.com", id: 1});
res.redirect function
This function is used to make redirect to another link It accepts one parameter
| parameter | type | description |
|---|---|---|
| url | String (required) | this parameter should specify url that you want to redirect to |
res.redirect("/anotherurl");
MiddleWares
middlewares is a group of functions used to run something before executing the final handler
the middWares property should be an array includes the functions
Every middleware should have three parameters
| parameter | type | description |
|---|---|---|
| req | object | implies the coming request object contains all information about the request |
| res | object | represents the response object |
| next | function | is a function you can execute it to continue to the next middleWare or to the final handler of the router |
Example
//middle ware
function writeWithMiddleware(req, res, next) {
// has three parameters
/*
1- req: the request object
2- res: the response object
3- next: a function you execute it to continue to the handler
*/
res.write("from middleware");
next();
}
homePage() {
return {
url: "/home",
middleWares: [],
method: "get",
handler: (req, res) => {
res.end("hello home page");
// final output on the browser:
//from middleware
//hello home page
}
}
}
not that the middlWares array can include many middleWare functions and the middleWares are applied according to the indexing inside the array
Validation
Grandjs includes awesome validation system to validate inputs and remove strip tags and check the correct email you can access on validation using on of two ways 1- Grandjs.helpers.validation 2- as a property inside request object inside handlers
validation.striphtmltags function
this function removes weird characters from the string to insure that there is no harmful characters inside the string
let str = "h1hello worldh1"
Grandjs.helpers.validation.strip_html_tags(str) // output hello world
validation.checkEmail function
This function checks if the string is emain or not
this function takes two parameters
| parameter | type | description |
|---|---|---|
| string (required) | this parameter is required and it should be a string that you want to test it as email or not | |
| cb | function (optional) | this is a callback function you can call it and includes one parameter either be true or false |
This function you can call it async with a callback function or sync without callback
1- with callback function
Grandjs.helpers.validation.checkEmail("test@gmail.com", (email) => {
if(email) {
console.log(email) //output true if it email
} else {
console.log(email) // output false if itsn't email
}
});
2- without callback
let email = Grandjs.helpers.validation.checkEmail("test@gmail");
console.log(email) // returns true if it email, if not, returns false
validation.notEmpty function
This function checks if the given string is empty or not
it accepts two parameters
| parameter | type | description |
|---|---|---|
| string | string (required) | to test it is empty or not |
| cb | function (optional) | this is a callback function you can call it and includes one parameter either be true or false |
This function you can call it async with a callback function or sync without callback
1- with callback function
Grandjs.helpers.validation.notEmpty("", (notEmpty) => {
if(notEmpty) {
console.log(notEmpty) //output true if it is not empty
} else {
console.log(notEmpty) // output false if it is empty
}
});
2- without callback
let notEmpty = Grandjs.helpers.validation.notEmpty("");
console.log(email) // returns true if it isn't empty, if it is empty, returns false
validation.checkContainsNumber function
This function checks if the given string contains numbers or not
it accepts three parameters
| parameter | type | description |
|---|---|---|
| string | string (required) | to test it contains numbers or not |
| count | Number (required) | refers to the count of the number you want to test the string contains. if you specify it for example 5 so the function checks if the given string contains five numbers |
| cb | function (optional) | this is a callback function you can call it and includes one parameter either be true or false |
This function you can call it async with a callback function or sync without callback
1- with callback function
Grandjs.helpers.validation.checkContainsNumber("Grandjs32test1", 3, (containsNumbers) => {
if(containsNumbers) {
console.log(containsNumbers) //output true if it contains number
} else {
console.log(containsNumbers) // output false if it doesn't contain three numbers
}
});
2- without callback
let containsNumbers =
Grandjs.helpers.validation.checkContainsNumber("Grandjs32test1", 3);
console.log(containsNumbers) // returns true if it contains 3 numbers, returns false if not
validation.checkIsNumber function
This function checks if the given parameter is a number or not you can use this function to authenticate phone number and stuff like that
it accepts two parameters
| parameter | type | description |
|---|---|---|
| value | any (required) | to test it is number or not |
| cb | function (optional) | this is a callback function you can call it and includes one parameter either be true or false |
This function you can call it async with a callback function or sync without callback
1- with callback function
let test = 1222;
Grandjs.helpers.validation.checkIsNumber(test, (number) => {
if(number) {
console.log(number) //output true if it is number
} else {
console.log(number) // output false if it isn't number
}
});
2- without callback
let test = 1222;
let number = Grandjs.helpers.validation.checkIsNumber(test);
console.log(number) // returns true if it is number, returns false if not
Cryption
Grandjs gives you functionalities to crypt important info and cipher them and decrypt them
encryption functions are inside helpers inside grandjs library
This helper uses the ENCRYPTION_KEY that you specify in setConfig function.
not that the length of ENCRYPTION_KEY should be 32 character
enCrypt
Grandjs.helpers.enCrypt(text);
This function takes one parameter which refers to the string you wanna encrypt or cipher it
| parameter | type | description |
|---|---|---|
| text | string (required) | implies the text that you wanna cipher it |
This function rreturns the string after cipher it
// encrypt password
let encryptedPassword = Grandjs.helpers.enCrypt("passowrd");
deCrypt
Grandjs.helpers.deCrypt(text);
This function takes one parameter which refers to the string you wanna decrypt or decipher it
| parameter | type | description |
|---|---|---|
| text | string (required) | implies the text that you wanna decipher it |
This function rreturns the string after decipher it
// encrypt password
let decryptedPassword = Grandjs.helpers.deCrypt("passowrd");
Session
Grandjs represents to you a session module which you can use it in login processes and setting cookies for logged in users
- you need to enable session in Grandjs configuration inside
Grandjs.setConfigfunction as the following:
Grandjs.setConfig({
// enable session module
session: true
})
2- now you need to set the max age of cookies for global sessions inside Grandjs.setConfig function as the following:
Grandjs.setConfig({
//enable session
session: true
//set cookies for one month and 30 minutes, after that it would be removed
setCookie: {
expires: {
days: 30, // refers to one month
minutes: 30 //refers to 30 minutes
}
}
})
setCooki is an object, you specify inside it an object called expires this object has two properties
| property | type | description |
|---|---|---|
| days | number (optional) | refers to the number of days that you want to set the cookie until it |
| minutes | number | refers to the number of minutes that you want to set the cookie until it |
Not that session is a global variable you can access on it from anywhere inside the project
session.set function
This is a function you call it when you want to set a session, this function takes three parameters
| parameter | type | description |
|---|---|---|
| sessionName | string(required) | this parameter specified the name of the session for example if the session for login so you can set it as "userInfo" |
| obj | object (required) | this is the info that you want to store in the session |
| sessionOptions | object (optional) | represents specific cookie configuration for this session only |
Example on session inside handler function
- set it without a custom cookie
postRouter () {
return {
url: "/user",
method: "post",
handler: () => {
let userdata = this.req.data;
// set it without custom cookie
session.set("userdata", userdata);
}
}
}
- set it with a custom cookie
| property | type | description |
|---|---|---|
| expires | object | the epires days and minutes of cookies |
| path | string (default: /) | represents the path that you want to make the user logged in, it is set to / as default |
postRouter () {
return {
url: "/user",
method: "post",
handler: () => {
let userdata = this.req.data;
// set it without custom cookie
session.set("userdata", userdata, {
expires: {
days: 1 // set the cookie for one day only
},
path: "/" // if you want set the cookie for a specific path
});
}
}
}
session.getSession function
This function gets the session of the user based on the name of the session that you specified in session.set function
if the session is exist this function returns an object contains data that you have stored, and if no session with that name it will return an undefined
let info = session.getSession("userdata");
console.log(info) //output: object || undefined
session.updateSession function
This function is very similar to session.set function and it takes the same parameters but this function you use it to updating an already exist session
// update exit session
session.set("userdata", {name: "tarek", password: "blablabla"});
session.breakSession function
This function breaks the session and stops it, so you use it when the user logs out
This function takes one parameter, that parameter is the name of the session that you want to break
// break the session
session.breakSession("userdata");
Auth module
This module is a built in module in Grandjs, it is used to make authentication inside the system to allow user login and logout securely. This module depends on the session
- Auth module is a global module you can access on it from any file inside the project
- This module represents to some functionalities for logging in process
auth.login function
This function is used to log in the user when he signs up or in.
- This function takes the same parameters of
session.setfunction andauth.logindepends on it
This function takes three parameters
| parameter | type | description |
|---|---|---|
| loginName | string(required) | this parameter specified the name of the session for example if the session for login so you can set it as "userInfo" |
| obj | object (required) | this is the info that you want to store in the session |
| sessionOptions | object (optional) | represents specific cookie configuration for this session only |
// login the user
auth.login("userdata", {username: "tarek", email:"test@gmail.com"});
auth.checkAuth function
This function is used to check if the user is logged in or not
- If the user is logged in returns:
true - if the user isn't logged in returns:
false
let logged = auth.checkAuth();
// output: true | false
auth.Auth function
This function is optional to use, the of it is if you are doing a heavy checks before require auth.login function so Grandjs represents to you this function which enables you to make some processing and returns a callback function after that has done parameter, it's value is: true or false
auth.Auth((done, cb) => {
// make some logic here
let some = 1+2;
if(some === 3) {
// set the done parameter
done = true;
return cb(done);
} else {
done = false;
return cb(done);
}
//
}, (done) => {
console.log(done) // outputs true
if(done == true) {
// login the user
auth.login("userdata", {});
}
})
auth.logout function
This function depends on session.breakSession function, it logouts the user and destroys the session
// logout the user
auth.logout();
Flash Messages
Flash is an object inside request object, it allows you to set messages to send them to the handlebars to show alert messages or success or any message you want to show from backend to frontend
flash is accessable inside any router handler
Example
// post router
router.addRoute({
url: "/login",
method: "post",
handler: () => {
// set error message
req.flash.errorMessage = "user not found"
}
})
// get router
router.addRoute({
url: "/login",
method: "get",
handler: () => {
this.res.render({
layouts: "./views/layouts/main.hbs",
body: "login.hbs",
data: {
errorMessage: this.req.flash.errorMessage
}
})
}
})
Add MimeTypes
if you want to serve more static files with another mimetype not exist in our built in mimetypes, so you can use the following function
Grandjs.addMimeTypes(extention, mimeType);
This function takes two parameters
| Parameter | type | description |
|---|---|---|
| extention | string (required) | represents the extention of the file that you want to check |
| mimeType | string (required) | The mime type that you want to set in the response header for the specific file |
Exmple
Granjs.addMimeTypes(".pdf", "application/pdf");
Built With
Authors
- Tarek Salem - Initial work - github
License
This project is licensed under the MIT License - see the LICENSE.md file for details
Acknowledgments
- url-pattern
- Handlebars template engine
- Hat tip to anyone whose code was used
- Inspiration
FAQs
A backend framework for solid web apps based on node.js
The npm package grandjs receives a total of 19 weekly downloads. As such, grandjs popularity was classified as not popular.
We found that grandjs demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
Package last updated on 31 May 2019
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Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
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