I created service in Visual Studio with Conveyor extension to make it accessible in local network. I installed certificate on my Android device so there is green padlock when calling it in browser and service works fine.
However when calling it from React Native app with axios then i get Network error.
That's my code:
const fetchData = async () => {
console.log('url', `${Settings.API_URL}/location/GetDataByMyIp`);
try {
const result = await axios(
`${Settings.API_URL}/location/GetDataByMyIp`,
);
console.log('result', result);
ipData = {
city: result.data.city,
longitude: result.data.longitude,
latitude: result.data.latitude,
};
} catch (e) {
console.log('error', e);
}
};
await fetchData();
In console i see:
url https://192.168.1.14:45455/api/location/GetDataByMyIp
error Error: Network Error
at createError (path_to_app\node_modules\axios\lib\core\createError.js:16)
at EventTarget.handleError (path_to_app\node_modules\axios\lib\adapters\xhr.js:83)
at EventTarget.dispatchEvent (path_to_app\node_modules\event-target-shim\dist\event-target-shim.js:818)
at EventTarget.setReadyState (path_to_app\node_modules\react-native\Libraries\Network\XMLHttpRequest.js:575)
at EventTarget.__didCompleteResponse (path_to_app\node_modules\react-native\Libraries\Network\XMLHttpRequest.js:389)
at path_to_app\node_modules\react-native\Libraries\Network\XMLHttpRequest.js:502
at RCTDeviceEventEmitter.emit (path_to_app\node_modules\react-native\Libraries\vendor\emitter\EventEmitter.js:189)
at MessageQueue.__callFunction (path_to_app\node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:425)
at path_to_app\node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:112
at MessageQueue.__guard (path_to_app\node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:373)
I tried to add this line to AndroidManifest.xml application tag but still have the error
android:usesCleartextTraffic="true"
Some solutions say about adding as 2nd parameter to axios, but it doesn't work with React Native.
new https.Agent({
rejectUnauthorized: false,
});
I tried to call some other service from the internet and then error was gone.
Is there some solution to this? I haven't found anything more. My last idea is to host service on Azure so I'll have properly signed SSL, but i guess it has to be a way to run it locally.
Edit: It works through http
Related
I'm creating a React Native/Expo app that uses Deno on the backend. I've created an API in the backend that I can run locally on localhost:4000. When I try to use fetch to call the API in the Expo app, however, I keep getting an error
[Unhandled promise rejection: TypeError: Network request failed] at node_modules/whatwg-fetch/dist/fetch.umd.js:535:17 in setTimeout$argument_0
Here is how I set up the backend
import { Application } from "https://deno.land/x/oak/mod.ts";
import { oakCors } from "https://deno.land/x/cors/mod.ts";
import { APP_HOST, APP_PORT } from "./config.ts";
import router from "./routes.ts";
import _404 from "./controllers/404.ts";
import errorHandler from "./controllers/errorHandler.ts";
const app = new Application();
app.use(oakCors());
app.use(errorHandler);
app.use(router.routes());
app.use(router.allowedMethods());
app.use(_404);
console.log(`Listening on port:${APP_PORT}...`);
And how I use fetch to call the API
const App = () => {
const getData = async () => {
const response = await fetch("http://localhost:4000/something");
const data = await response.json();
console.log(data);
};
useEffect(() => {
getData();
}, []);
return (
...
);
};
Note
Some answers on StackOverflow suggest fetching http://[IP_ADDRESS]:4000/something instead of localhost. I've tried that with no luck.
I've verified that the API is working. I can call it successfully in VSCode's Thunder Client and I can also see the data by going to http://localhost:4000 in the browser.
I found a solution to this issue. I'm running my Expo app on a physical device while my server is running on my computer, on localhost. It makes sense that I'm unable to make requests to localhost on my device, because localhost is not running there.
I fixed this issue by using ngrok, a tool that forwards localhost to a cloud URL, and fetching that URL in the app.
Use the local IP assign to your device, like: http://192.168.20.109:port/api/x
find the local IP using the command "ipconfig" in windows or ifconfig in linux
first time using React Native with Expo. I saw some tutorials on how to fetch something from locahost but nothing seems to work.
I'm making this simple get request in my backend
app.get("/", async (req, res) => {
res.send("Success");
});
app.listen(5000, () => console.log("Running on 5000"));
On the front end i have
const requestTest = async () => {
try {
const msg = await axios.get("http://192.168.0.29:5000/");
console.log(msg);
} catch (error) {
console.log(error);
}
};
What i tried so far:
Replaced http://localhost:5000/ for my ipv4 address 192.168.0.29, like http://192.168.0.29:5000/.
Since i'm using expo when i start the server it says Metro waiting on exp://192.168.0.29:19000
So i tried to fetch http://192.168.0.29:19000/, also didn't work. After starting the server, i ran this command line adb reverse tcp:5000 tcp:5000, also didn't work.
OBS:
When i connect my app on Expo GO, i'm connecting it through Tunnel, cause if i try to connect it via lan it throws a Network Error.
I'm facing this issue while posting data to my server via axios.post(). It always catches the error "Network Error" when I run my app on my real android device. But when I use an android emulator device, it works correctly and returns the response. I tried to use "ngrok http 5000" and used the uri that ngrok gave me but that didn't work either. I'm hopeless at this point because my app is using QR code scanner and indie notifications. I'm unable to test it while using emulator. Please help me!
I'm leaving my axios.post() method below
const login = async (email, password, navigation) => {
userState.loading = true;
axios
.post(`http://${localIP}:5000/api/user/login`, {
email,
password,
})
.then((response) => {
userState.loading = false;
userState.user = response.data;
console.log("Data: ", response.data);
navigation.reset({
index: 0,
routes: [{ name: "Home" }],
});
})
.catch((err) => {
userState.loading = false;
console.log("ERR :", err.message);
});
};
I tried to use "ngrok http 5000" and used the uri that ngrok given me but that didn't work either.
Might be a little light on information in order to give a definite answer, it's worth looking at installing a debugger and inspecting the network requests to see where they're going wrong. But here's a couple things to try:
In your AndroidManifest.xml file add the line: <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
Use http://my.local.ip:port instead of http://localhost:5000 (looks like you're doing this anyway, if not you get this via ipconfig in Command Prompt)
Try adding "Content-Type": "application/json", Accept: "application/json" headers to your Axios request
When I use fetch() method to make get request, it failed with "TypeError: Network request failed". It's weird that it sometimes failed but sometimes succeeded. I have tried the solution here: React Native fetch() Network Request Failed, but it didn't work for me. By the way, I am using Android.
This is my code :
try {
let url = "http://140.116.245.229:3000/GetCarsJson";
let data = await fetch(url);
let toJson = await data.json();
} catch(err) {
throw err;
}
This is the error message :
enter image description here
You should ensure your devices/simulator/emulator can connect to this endpoint
If you use Android emulator, you can refer this link How to connect to a local server from an android emulator?
I'm new to react-native, I want to fetch some data from my local laravel server, but I fire the mobx action I get the following errors:
Network Error
[Unhandled promise rejection: Error: Network Error]
This is my mobx action (I'm using flow, similar to async/await), I get 'fire' log but after that I get the error above:
listProducts = flow( function*(payload)
{
console.log('fire');
try
{
let response = yield axios.get('http://192.168.1.39:8000/api/products', { params: payload });
this.posts = response.data;
this.pagination = response.data.pagination;
console.log(response);
//return response;
}
catch (error)
{
console.error(error);
throw error;
}
});
As you can see I'm using my local IP instead of localhost, I'm also testing my app on my android device using EXPO connected to the same network as my dev laptop.
Ciao, I can't see errors on your code. Try to follow this guide to handle Unhandled promise rejection. Could help you to find a clue.
In brief the guide suggest to use axios interceptors:
axios.interceptors.response.use(
response => response,
error => {}
)