Connection Refused Error in NetMaui Application or its API

Question

Connection Refused Error in NetMaui Application or its API

Yusuf 791

Hello,

I have a Net Maui application and its API

The application/API works, but when sending many requests to the server, this exception occurs:

Connection refused.

The API cannot be accessed from the phone browser, but it can be done from the desktop browser

The exception occurs intermittently

The application

https://github.com/devenv2/TestapiMauiApp1

API

https://github.com/devenv2/WebSite2

Phone OS

android 7.1.1

SSL

let's encrypt

Thanks in advance

Yusuf 791 Reputation points

2023-01-16T07:31:56.6666667+00:00

I did not receive an answer, Can you please help me?
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,456 Reputation points Microsoft External Staff

2023-01-16T09:43:05.6533333+00:00

I tested the project you provided, but I cannot reproduce the issue. (I tested on iOS simulator, I created an android 7.1 emulator, it is old and cannot start on my machine) You said "The API cannot be accessed from the phone browser", I checked the code in MainPage, there is a HttpClient Get request (not a browser), did I miss something? Could you share the detailed error/exception message with me?
dk l 0 Reputation points

2024-02-19T10:19:41.8+00:00

I have the same issue.

httpClient.GetAsync return Connection Failure. On browser, my request works but not it an .Net Maui app. In the manifes file, INTERNET PERMISSION is set: <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.INTERNET" />

1 answer

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Yusuf 791 Reputation points

2023-01-16T07:31:56.6666667+00:00

I did not receive an answer, Can you please help me?
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,456 Reputation points Microsoft External Staff

2023-01-16T09:43:05.6533333+00:00

I tested the project you provided, but I cannot reproduce the issue. (I tested on iOS simulator, I created an android 7.1 emulator, it is old and cannot start on my machine) You said "The API cannot be accessed from the phone browser", I checked the code in MainPage, there is a HttpClient Get request (not a browser), did I miss something? Could you share the detailed error/exception message with me?
dk l 0 Reputation points

2024-02-19T10:19:41.8+00:00

I have the same issue.

httpClient.GetAsync return Connection Failure. On browser, my request works but not it an .Net Maui app. In the manifes file, INTERNET PERMISSION is set: <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.INTERNET" />

Answer 1

Based on your question, I think there is a problem with throttling/rate limiting with the API. Many shared hosting options protect the hosted API's against too many requests to prevent a DDOS attack and server overload. If you perform only a few requests (after a wait period), the server will probably work correctly. Check the HTTP status code. If it is 429 then you have reached the rate limit set for GitHub Pages (https://docs.github.com/en/pages/getting-started-with-github-pages/about-github-pages#limits-on-use-of-github-pages). If you need more concurrent requests than the rate limit allows, I would suggest moving to Azure.

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Connection Refused Error in NetMaui Application or its API

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