I am using Hoplon to create a fairly simple site and an stuck on the AJAX part. In the past I have used Castra as the backend but since it is no longer maintained I have switched to a normal LuminusWeb backend. I am in need of making a call to the server in which I will the server and then wait for a response. I know how to do it on the server side but I can't seem to find any information about how to do it on the Hoplon Client side.
How can I send a request to the server using an AJAX call?
I know how to do it in jQuery and assume, possibly wrongly, there is something similar to $.POST in Hoplon.
Cheers
The best way to solve this AJAX problem that I found is to use the library 'cljs-http' and then you can make an synchronous request using a call such as:
(http/post "http://localhost:8080/" {:with-credentials? false})
Then, on the cljs-http GitHub README.md it gives plenty of examples so you can then do asynchronous in Hoplon.
Related
I want to develop an action to google assistant. So i red the documentation here https://developers.google.com/assistant/conversational/overview and i followed this tutorial https://www.youtube.com/watch?v=Z1hxvniJ18s
It s worked and i was allow to develop and test my app in the simulator. The problem is that when it's come to webhook i don't totaly understand how it's work. On the webhook icon i got this
The seconde one allow me to use Google cloud function and firebase but i had to add my billing account to make it available. I also get a console where i can code my fonctions and my responses.
And if i am correct, the first one allow me to connect to my own Api. But i can only enter one field that is the URL adresse and nothing else so how do i code it? Also i see everywhere people using node.js and i would like to use php is it possible?
To sum up my problem, i would like to know how i could connect my action builder to an other service(Api) than google ones? If it's possible to run my server in php and how do i interact with my google action?(I think it's by sending json back and forth but i'am not sure how to do it?) Finally i would like to know if it's possible to test it in local server with mamp and phpmyadmin for exemple to test the answer of the server?
I would be very grateful if someone could help me, show me how to set up all this.
But i can only enter one field that is the URL adresse and nothing else so how do i code it?
When you develop your webhook, you will need to have a single publicly accessible endpoint to connect with. This endpoint will receive an HTTP POST request and you will need to respond with an appropriate response.
Also i see everywhere people using node.js and i would like to use php is it possible?
Any language that can run on a web server can work. Node.js is one that is used a lot, but PHP can work just as well. You can create an actions.php file and then enter an endpoint address https://example.com/actions.php that will be called. You may need to refer to the Request and Response reference for the expected format.
if it's possible to test it in local server with mamp and phpmyadmin for exemple to test the answer of the server?
It's somewhat possible. You'll need to have some method of sending mock requests to your local server, which might be as easy as using cURL or other tools like Postman.
Unfortunately my personal experience with PHP tools is limited, so I can't necessarily walk-through the specifics. But it does seem like you know these tools a bit more and should be familiar enough to be able to get started.
I run an self-hosted instance of BigBlueButton and signed up for Xirsys TURN server services because we need to serve clients behind (pretty restrictive) firewalls. Before I had been running my own instance of coturn, but as this led to problems recently, I thought I will got someone who does this for a living a try.
Now the configuration in BBB is explained here:
https://docs.bigbluebutton.org/2.2/setup-turn-server.html
Yet so far I completely failed to match the parameters I receive from Xirsys with what I have to put into the /usr/share/bbb-web/WEB-INF/classes/spring/turn-stun-servers.xml file in the place of the <turn.example.com> and <secret_value>.
Did anyone ever make this work? I did try and find a tutorial but also failed.
bbb_web, is returning this the turn uris. passwords to the html5 client, that the client is using in sip.js
so you can either get bbb-web to send valid username/passwords is same method is used, or modify the html5 client to make a Xirsys api call, to get access to the turn candidates.
Would need to look at api docs. twilio has a similar service.
regards,
Stephen
not the most elegant solution but the easiest one for me:
modify the final bbb js bundle to load the stunturn info from a fixed url in
e.g.
/usr/share/meteor/bundle/programs/web.browser/f30716b2b57e2862c4db2325 b7aac63f4622842b.js
the minified part should then look somewhat like:
const r=Meteor.settings.public.media,i='https://<yourbbburl>/html5client/stunturn.json',a=r.cacheStunTurnServers,s=r.fallbackStunServer;
and put either the static credentials or generated ones in a file stunturn.json besides the js bundle.
I'm trying to develop rest api for the first time. And looking to loopback references that uses change stream for the resources like /resources/change-stream with the GET and POST methods.
I have visited this post which indicates differences between rest api and streaming api.
While the loopback is providing it in rest api, I think. What is it and what it does. Can you please explain it to me in a way that you're making clear to me (for a six years old child). Because, I am developing REST API for the first time in my own. So, I would like to understand step by step if possible like what should I have in the postman. Should I use the url like '/api/resources/change-stream?_format=event-stream along with application/json content-type or just /api/resources/change-stream would be fine.
It would be great example if you could provide me some real example so that I can develop it trying in my own application.
PS: It's perfectly fine to me whichever language (Node.js, Python, Ruby, PHP) you'd choose to provide answer with some examples.
If I had to guess, it sounds like a 1-way long polling where you leave a long running, open request to a server that will fulfill the request when an event happens. If the request times out, don't worry about it, send another and leave it open. When the request is fulfilled with an event, immediately fire another request so that you can receive the next event.
Since the document on the other end of the API is still (probably) a JSON document, you should keep that mime. However, you aren't limited in what you can send back as an event type; if you want to send back XML or YAML, do so and set that mime. The "stream" is just a convention mechanism.
As far as your application is concerned and from a REST perspective, it just takes a while for the event that you are trying to get to be provided to you and it has a high chance of failure. But I wouldn't look at this from a REST perspective, REST is just convention, don't let it tie you down.
Alternatively, long-polling should probably be replaced by something like a WebSocket as it provides a much easier API (in my opinion) and doesn't seem as hacky as long-polling.
If you're trying to ask, "how do I tell a RESTful consumer that my API is a 'stream' API", there is not point. Again, as far as REST is concerned, the https://example.com/api/events/ endpoint refers to a JSON type document that changes a lot, takes a long time to receive, and "fails" often (if the events you generate don't fire a lot).
I need to implement geo location detection on our website.
(I need to calculate and pass state variable to Google Tag Manager, in future this variable might be used on server side to render specific block depending on state, but for now it will be only needed in client side for GTM)
I've found this article very helpful. It's a bit more complex example for detecting weather. I need only geo location.
In the article the author gives example with client side API call, but several times he recommends using exactly server-side calls.
For those who want to take this weather analysis seriously, I really
recommend moving to a 100% server-side solution, where the weather
data is polled before the page itself is rendered, and the data is
written in the dataLayer of the page.
and
If you’re serious about this solution, you might want to install a
geolocation service on your own web server, so that you’ll avoid
needing to make any extra API calls in the client.
So seems like server-side detection is better, but I don't really understand why. Could anyone explain please.
One given reason is security - if you query a commercial API via Javascript and pass the API key in your requests someone else might use it at your expense.
Also with JavaScript you have to issue your request and then wait for the response before you continue to render your page. With a server side solution querying, error handling, etc. is already done when the browser renders the page; also you might possibly cache the requests to you API to lower your costs and speed up delivery.
I followed these instructions
http://code.google.com/webtoolkit/usingeclipse.html
There appears to be no entry point function for the server? How do I run background threads or code not related to the rpc services that the server exports?
For example, what if some embedded database needs to be updated every 5 minutes. So then a background thread would fetch this new data to do the updating
GWT is client-side technology and has nothing to do with server-side. You can use any servers-side technology with it. If you use java/servlets then you can optionally use GWT-RPC, which is nice, but not required.
Web applications are based around request-reply paradigm: when there is a request, they handle it and send back the reply. Servlets are designed around this paradigm. They are used at some of the largest sites and are not just a toy (as you noted in other comment).
When you need something to run periodically, then this is usually the job for Job Schedulers. I'd recommend Quartz, which has great documentation. There is also an example how to initialize it in servlet environment.
thats not how web applications are supposed to work. Read http://code.google.com/intl/de-AT/webtoolkit/doc/latest/tutorial/clientserver.html
If you want to run some processing when request comes and potentially include some dynamic parts, you can just make your pages to be JSP or servlets. GWT does not need to be used in HTML files. Just the page served by server need to be HTML. So something like server side entry point is either JSP or servlet. Otherwise you need to use PRC. But if you needed to run RPC for every page loaded, you could consider this tip of embedding RPC in the base response.