That's basically my question.
Is there any way to have a PWA accessible in a public cloud service and when the user install it, locally, it can access a local REST API server to retrieve information?
Thank you
Related
I'm building web app with flutter web and I'm using firebase hosting to serve the web app.
The web app makes an API post request to the static IP of my aws ec2 instance to get a response
const String api = 'http://7.91.300.2411:8080/predict';
Map<String, String> upload = {'data1': _data1, 'data2': _data2};
var _body = jsonEncode(upload);
final Uri uri = Uri.parse(api);
http.Response response =
await http.post(uri, headers: _headers, body: _body);
When I run the app on development, like on my local machine, it works, I see the logs on my ec2 server saying the endpoint was hit/called, and then it runs successfully.
But when I now deployed this web app to firebase hosting, the endpoint never gets hit/called, is as if the http post request was not made.
I've upgraded my firebase plan to blaze, yet it's still not working. I also enable cors on my ec2 instance.
Something I taught could solve the problem, was to edit the firebase.json file, and add some config to enable firebase hosting allow calls to external apis, but I don't know how to go about it
Actually, Firebase Hosting does not make calls to external APIs. Firebase Hosting "serves both static and dynamic content to a global CDN (content delivery network)". In the case of a Flutter web app, Firebase Hosting serves the files that were generated in the /build/web directory of your project when you built the app for deployment (aka the app release bundle).
The only scenario I can see that could be considered as Firebase Hosting making calls to external APIs is if you pair Firebase Hosting with Cloud Functions or Cloud Run, which, when they are executed, call the external API. Strictly speaking, in this scenario, Firebase Hosting does not call an API but serves dynamic content that was generated via a call to an API.
If I'm not mistaking, by looking at your code, we can conclude that this scenario does not apply to your case. In your case, Firebase Hosting just hosts your Flutter app release bundle.
In your case, you are using the Dart http package in order to call the API from your web page/app. I don't see any reason why Firebase Hosting would prevent that: Your browser has downloaded the web page from Firebase Hosting and then the web page initiates, from your browser, a direct call to an API (without calling Firebase Hosting). So most probably the problem comes from something else.
I am working on a platform (www.dashboard.example.com) that has an admin site (www.admin.example.com). Each site is hosted on a different Google Firebase Hosting Project.
I want only certain people to be able to access the admin site. After some consideration, I found an IPSec VPN to be the best solution for me.
I also found that GCP offers a VPN service, but from what I can tell, it seems to only work with google compute engines.
Is there a way to attach a Google VPN to a Firebase Hosted site?
There is no way to attach a Cloud VPN to a Firebase Hosting Project.
In GCP the correct way to restrict the access to your web server/application is by using firewall rules/App Engine's firewall and Cloud VPC/VPN service.
Your approach should be to put a proxy by configuring a Google Compute Engine1 in between your gateway service and your Firebase Hosting Project.
Another approach would be to use Cloud Storage2, as a static website3. You can then create an HTTPS Load Balancer based on Backend Bucket4. With this you can benefit from the advantages of using Load Balancer and also using Cloud VPN.
If you are interested in authentication with Firebase and App Engine I suggest to check the following link 2.
I have hosted my WEB APP in firebase. It consists of a WEB APP that calls a WCF Service also hosted in firebase.
The problem is that at the time of calling service, firebase returns 404 error.
The app and the service work perfectly in my local IIS, so it's not a code error.
I commented to them that the error that it gives me is that it does not find this page (404) when in fact I would be returning the result of my query.
https://recoveryerpwcf.firebaseapp.com/General.svc/Select?tabla=Compania&codigo=0&columnas=%5BCodigoAgrupado%5D%7C%7C%5BDescripcionAgrupada%5D&filtro=&columnasf=%5BDescripcionAgrupada%5D&top=999&_=1528745507843
Firebase Hosting can serve static assets, and (by connecting it to Cloud Functions) Node.js scripts.
There is no way to host a WCF service in Firebase.
I have an Azure Web App hosting an API (ASP.NET MVC project) that interacts with a CosmosDB database and collections to get subscriptions and other information.
The CosmosDB database is accessed R/W by the Web App middle-ware uses through the nuget package "Microsoft.Azure.DocumentDB" SDK v1.19.1.
I am trying to set up the CosmosDB IP Firewall through the Azure Portal. I allowed the Azure Portal to have access to the db and then I needed to also allow the web app (also hosted on Azure) to have access. To do this, I copied the Virtual IP Address of the Web App from the Properties tab in the Azure Portal.
But this was not enough. I waited more than 10 minutes trying my web app but all the calls to the CosmosDB were rejected with error 404, which as the documentation states it is the proper behavior for SDK Calls (security reasons).
Then I added, all the Outbound IP Addresses stated at the same Properties Tab of the Web App. Waited for more than 20 mins and still 404 error.
What are the correct steps to achieve the requested task?
For example in SQL On Azure, the IP Filtering allowed for an option, to allow access from any Azure App/ VM / Service. How can we achieve the equivalent in CosmosDB?
Thanks in advance
Since Azure App Service is PaaS, and following this article, please try adding the IP 0.0.0.0.
On the Azure Portal, this can also be set by switching on Allow access to Azure Services.
I am trying to test run a basic .NET web application on pivotal cloud foundry. This web application uses as its database a MongoDB server hosted on my local machine. At the moment I am limited to use of the cloud infrastructure by using just the Apps Manager.
I have read the pivotal cloud foundry docs about user provided services, but cannot figure out as to how the connection is to be really made. I have already come across various other ways like using MongoDB as a service (beta version), but at the moment I am not allowed access to the Operations Manager. Looking for an explanation on user provided services or how to implement the service broker API, specifically.
I am new to Mongo as well, so any suggestion regarding making a connection through tweaking Mongo may help as well. Thanks
The use case you describe (web app in PCF connecting to a resource in your local machine) is not recommended.
You can create a MongoDB instance for development purposes in PCF.
$ cf marketplace
...
mlab sandbox Fully managed MongoDB-as-a-Service
...
You can create a mlab service and bind it to your application. You will then have a MongoDB instance in PCF that you can use for development purposes.
Edit:
In that case a user provided service might help you, where you pass in your remote MongoDB instance configuration that you can read in your application. e.g.:
cf.exe cups my-mongodb -p '{"key1":"value1","key2":"value2"}'
You can add your local mongo-db as a CUPS service to your PCF Dev.
Check out the following post.
How to create a CUPS service for mongoDB?