I have very basic knowledge in JS and C#, and now I'm trying to build my first web app with JS. I want to create a web app which creates a GET request to Coinbase website and takes the current price of Bitcoin, Ethereum and etc. and show it in my web app.
Can you provide me a website where i can start with?
Thank you.
Coinbase has a maintained API you can use to fetch the data you need. They support various solutions (REST, Websocket, etc.), depending on your requirements.
Resources for getting started with general web development is an entirely different beast. I would suggest Angular's Heroes Tutorial, and from there read up on AJAX or Websockets (for the latter, I suggest socket.io).
Expect 100-250 hours work.
Related
First off sorry if this question is a 'bad' one; I am very new to the world of web apps, API's and Javascript.
As the title says I am trying to get a user's steamID using the Steam API using javascript.
This is for a web app that needs to get information about the games a user plays. (Which from my understanding is only obtainable using this special ID.)
My initial thoughts on how to do this would be to use openID so that the user gives Steam their info and the ID is returned to my app.
I have seen that there are lots of examples of this using php; however, because of project requirements, everything must be run in the browser. There is no backend server to even run php on so it is not an option what so ever.
I have spent a better part of a day trying to figure this out and have made no real progress, everything seems to lead back to using php. (maybe what I need under my requirements is not possible?) So an example or anything really would be much appreciated.
welcome to Stack Overflow I can see you are confused as to where to start or progress so here is a basic roadmap:
You will need to contact Steam to get an API key first.
Next part is more tricky for a beginner. You will need to get node.js which is a package manager. Effectively it's a large library of javascript programs which you can import into your own program to do things with. One of these so called "packages" is openid-client, which is an implementation of openID that you can add to your site. Users click on the openID button on your site, it redirects them to steam servers, they login, then your site gets their info without leaking their username or password to you.
Now that you have both the steamID and your API Key your program can input these two into the url steam provides to get owned games. You can input this completed url into fetch or axios (another node package that can request data from servers) and it will respond with the user's owned games in json format.
Here are a list of resources in order to get you started:
https://steamcommunity.com/dev
https://nodejs.org/en/
https://www.npmjs.com/package/openid-client
https://www.npmjs.com/package/node-fetch OR https://www.npmjs.com/package/axios
https://developer.valvesoftware.com/wiki/Steam_Web_API#GetOwnedGames_.28v0001.29
I suggest reading the documentation in each of these links and seeing if there is any youtube tutorials that try and do what you are doing with these technologies to help you implement them as a newbie. Overall there is a lot to learn on each of these technologies but as long as you orient yourself using guides or tutorials you will succeed. Good luck.
Check out this page: How to retrieve Steam username using SteamWorks API?.
However, it seems like an issue you might be having is connecting to the actual API. What exactly are you using for testing?
I know from experience, for example, that you can connect using Postman to various API's, and format a request for them in a chosen language, including JS>
I've currently got a REST API (written in Java using Spring) and a frontend for that API (written in Javascript using Express) which will query that API for the data to display. I've not gotten too far along in the frontend, and wanted to add in my Authorization/Authentication. I would like to use Azure Active Directory (AAD) for this - we have users in AAD, so this is what we're pursuing. I understand that I can use the MSAL.js library to get an access_token that I can then send to my Java REST API for validation. However, I'm not able to find any decent documentation or examples for this specific case, though. I see a some Javascript Single Page Application (SPA) documentation and examples, but seeing as this is AuthN/AuthZ, I don't want to have a kinda correct solution, because this is important stuff. I also want to make sure I'm handling caching, sign outs, etc, in the right manner.
If anyone could point me in the direction of some documentation, examples, readings, etc, I'd be very appreciative!
Thanks!
You can use MSAL.js to easily integrate with the front end of your API for authentication/authorization of your users.
For java web apps, you can use the MSAL4J authentication library, so that the application can be integrated with the Microsoft identity platform. It allows you to log in to a user or application using a Microsoft identity (Azure AD, Microsoft account, and Azure AD B2C account) and obtain a token to call the Microsoft API.
For more details, please check:here.
We are looking for your input regarding architectural design of a Javascript API and a .Net (Rest) API.
Background
We are building an enterprise solution with several different channels (Site, App etc) that are consuming data through a service layer, or API. The API is on one hand a .Net WebAPI that are communicating with the business layer but we are also thinking of wrapping external Javascript services (Communication with Google Maps, Google Analytics, Social Login etc) in some sort of API, or maybe SDK. The idea is to have the possibility to quick change components in the Javascript Library (Replace Social Login Provider with someone else).
What is your ideas regarding the Javascript? Should that just be a SDK that wraps other libraries?
Thank you,
Robert
I think it will depend on how much control you want to give to your client side development groups. If the UI development group is faster (and on different release schedules) than the group that manages this SDK, then the SDK will just get in the way (unless they are in lock step with the UI group). It would be better to just give them access to the server side APIs then let me compose the page as they see fit.
I am trying to set up a simple set up as follows:
Have a mobile app with a page consisting of 4 lines (4 html paragraph lines (I am using phonegap)).
I want to use a web page from which I will input the data for those 4 lines. This information is sent to a server and that server transfers this information to that app on that mobile phone. Now, those 4 lines on the mobile phone is filled with the new information.
Similarly user inputs information on another page consisting of 10 lines of li (list). This information is again sent to the server and to the web page where the information is displayed.
I can almost feel the "internet police guys" getting all hyped and ready to vote this question down. But please understand that I have been on this site and various forums desperate to find a tutorial to guide me to do this and not able to find.
I am trying to use ajax to perform this setup. Confused how I would be using the php file. Information such as password n username is going to go in that php file to connect to the server. But php is a server side script thus needs to sit at the public_html folder. How do I use the php file from my desktop? Write a separate javascript to access it?
It is the concept that is confusing me. I am familiar with html,js,php.
I would appreciate any guidance or maybe a link to a tutorial which would help me to do the concept I mentioned. Thanks for listening.
You will need to create an API using PHP. This API is uploaded to your server and is considered "RESTful". Google a tutorial for what fits your needs. You can set all sorts of rules in this API such as requiring any requests to have an ID or access token.
Since you are using PhoneGap, your HTML and JS files rest on the device, so you will need to allow permissions to your API from anywhere. For this you will have to speak to your host provider about unless you know how to configure it yourself (some providers restrict what you want to do by default as an extra security precaution against XSS attacks).
Next, you can either use jQuery, or you can write some AJAX calls by writing the JavaScript yourself.
The most efficient way for this to work is to send JSON objects to and from the API. You will include a "command" in the JSON when you are sending from your app. On the PHP side, you will retrieve this command and use the rest of the data included in your JSON object to process the request. Your API will need to encode a JSON object for return (such as a user's profile information).
Here is a basic PHP API tutorial to get you going that explains some of the features of a RESTful API: PHP API
Here is a simple AJAX function (you will probably want to make this much more modular): AJAX
As broad as your question is, it seems like the best/easiest thing for you to do will be for you to first create a PHP webpage that will access a SQL database to perform the record updating. Actually, this should serve all of your needs for your mobile users assuming you don't need push notifications for live data updates.
I am assuming, since you are using phone gap, that you are more comfortable with web languages. After you get the webpage fully operational, then you should start building your app based on that exact same SQL database. With mobile app development there are a lot more "what if's" (what if the phone rings, what if the app is running in the background, what if there is no cellular service, etc...)
It is always easier to start with what you know and build on that, rather than starting with a new development platform and troubleshooting as problems arise.
I am planning to make a web application which will just show me all the tweets for a specific trending topic. For example, if I have #WebTech #SEO #SHARE, I want to see all the tweets for this trend. Can you tell me how to get along with it? I have knowledge about programming and I would like to make it using the JavaScript APIs may be using the REST in JavaScript. Please let me know the API and the method in which I can do this. I don't want to authenticate a user. I just want to show them the trending topics. Please help.
I prefer the streaming API for stuff like this.
If your interested in the streaming API, it can be used for this but will requires quite a bit of work to really get it to be good enough for production.
However you would have to use a server side language to open the stream so it will be secure and parse the json into a database or straight json file. You could then have javascript use these as a data source.
These resources are invaluable for getting started with the streaming API.
PHP READING STREAM
http://hasin.wordpress.com/2009/06/20/collecting-data-from-streaming-api-in-twitter/
TWITTER STREAM API
https://dev.twitter.com/docs/streaming-api/methods#track