React: Axios Network Error

Question

This is my first time using axios and I have encountered an error.

  axios.get(
    `http://someurl.com/page1?param1=1&param2=${param2_id}`
  )
  .then(function(response) {
    alert();
  })
  .catch(function(error) {
    console.log(error);
  });

With the right url and parameters, when I check network requests I indeed get the right answer from my server, but when I open console I see that it didn't call the callback, but instead it caught an error.

Error: Network Error Stack trace: createError@http://localhost:3000/static/js/bundle.js:2188:15 handleError@http://localhost:3000/static/js/bundle.js:1717:14

You might be able to figure out more about this using `console.log(error.response.data)`. — fnune, Aug 31 '17 at 11:28
See this answer, it will help you knowing what the error is exactly https://stackoverflow.com/questions/44806333/unable-to-catch-and-log-the-error-response-from-an-axios-request/44806462#44806462 — Shubham Khatri, Aug 31 '17 at 11:37
Great you were able to figure it out. But do handle errors with axios as mentioned in the link I posted — Shubham Khatri, Sep 03 '17 at 16:18
@ShubhamKhatri I still didn't manage to make it work. I get status: 0. Thanks for the advice for error handling. — Mirakurun, Sep 03 '17 at 16:42

jacobhobson · Accepted Answer · 2017-11-16T18:04:38.187

82

If Creating an API Using NodeJS

Your Express app needs to use CORS (Cross-Origin Resource Sharing). Add the following to your server file:

// This should already be declared in your API file
var app = express();

// ADD THIS
var cors = require('cors');
app.use(cors());

For fuller understanding of CORS, please read the Mozilla Documentation on CORS.

edited Nov 16 '17 at 18:04

answered Nov 15 '17 at 21:25

jacobhobson

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5

I am not using Express. I am using Axios in ReactJS app. What can I do to use CORS in axios? – Ahmed Aug 12 '19 at 21:13
1

One important point is to add the cors middleware before the code that you handle the request – Deniz Ozger Aug 25 '20 at 19:22
4

THANKS!, Life saving. I was trying to run an angular app that talked to node from my phone, and it did not worked. Even when it worked from my computer. If node cannot find CORS "module not found", just run npm install cors. – Ramon Araujo Sep 17 '20 at 08:01
2

this answer apply also for NestJS, I got the same error in the client side, and had to add `{ cors: true }` to `NestFactory.create`. - ,,,,, `app = await NestFactory.create(AppModule, { cors: true }); ` – Ofir G Mar 26 '21 at 14:48
I am using django. How can I solve this issue? – Sumit May 02 '21 at 16:34

score 17 · Answer 2 · edited Jul 28 '20 at 12:13

17

my problem was about the url I was requesting to. I hadn't inserted http:// at the beginning of my url. I mean I was requesting to a url like 92.920.920.920/api/Token instead of http://92.920.920.920/api/Token. adding http:// solved my problem.

edited Jul 28 '20 at 12:13

phoenix

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answered Apr 30 '19 at 10:57

Mahdieh Shavandi

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2

I am using that, I even upload my nodejs app to heroku – tiedmud Apr 04 '20 at 16:33

score 13 · Answer 3 · answered Dec 06 '20 at 08:07

13

It happens when you work on localhost and forgot to add http://

Wrong Usage

  const headers = {
    "Content-Type": "application/json",
    Authorization: apiKey,
  };
  const url = "localhost:5000/api/expenses/get-expenses";

  axios.get(url, { headers });

  // NETWORK ERROR

The correct one is

  const headers = {
    "Content-Type": "application/json",
    Authorization: apiKey,
  };
  const url = "http://localhost:5000/api/expenses/get-expenses";

  axios.get(url, { headers });

  // WORKS FINE IF YOU HANDLED CORS CORRECTLY IN THE SERVER SIDE

answered Dec 06 '20 at 08:07

Samil Kahraman

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6
13

Forgetting the port made it not work for me, and this help trigger the thought, thanks! – Jim Mar 23 '21 at 19:52
Also, when you are on localhost and use `https` – wayne Jul 14 '23 at 13:14

score 7 · Answer 4 · answered Nov 28 '19 at 13:13

7

In addition to @jacobhobson answer, I had also used some parameters to made it work.

app.use(cors({origin: true, credentials: true}));

answered Nov 28 '19 at 13:13

Tiago Barroso

329
4
4

Hassaan Rana · Answer 5 · 2020-07-14T17:41:06.107

4

I was having same issue on production on digital ocean droplet. I was using axios in ReactJS to call Node.js API.

Although I included cors

const cors = require('cors');
app.use(cors());

But I still had to add

res.header( "Access-Control-Allow-Origin" );

before calling out my controller. And it worked for me. There I realized that cors is not working properly. So I uninstalled and installed them again and It Works!

Complete code is here.

So either you use

 app.use(function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');
  res.header("Access-Control-Allow-Headers", "x-access-token, Origin, X-Requested-With, Content-Type, Accept");
  next();
});

or use

app.use(cors());

It's the same.

edited Jul 14 '20 at 17:41

answered Jun 29 '20 at 05:34

Hassaan Rana

45
7

and where I should include cors ``` const cors = require('cors'); app.use(cors()); ``` ? – jhon Jul 04 '20 at 08:23
You can use it before calling your routes in server.js or if you are using some middleware then you can put these lines there. P.S. I've updated my answer as well. – Hassaan Rana Jul 14 '20 at 17:42
1

I have use `app.use(cors());` though it is showing network error. But not every time I am receiving this error. I am calling an API for the video uploading. After several times calling it is throwing me the network error. – Jayna Tanawala Aug 17 '21 at 06:04
@JaynaTanawala Have you installed cors? Try running "npm install cors --save" – Hassaan Rana Nov 30 '21 at 07:58
yes. Have installed it. – Jayna Tanawala Dec 02 '21 at 06:03

score 4 · Answer 6 · edited May 12 '22 at 13:15

4

I received a network error with axios 0.27.2 when I was trying to upload an image to our server. After I set headers like below no error is received.

headers:{"Accept":"application/json, text/plain, /","Content-Type": "multipart/form-data"}

and you need to check with your api request's body type in your collection like if it's form-data or x-wwww-form-urlencoded or ..etc.

edited May 12 '22 at 13:15

Skoua

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answered May 11 '22 at 17:18

A.A.

81
2

score 3 · Answer 7 · edited Nov 03 '20 at 11:25

3

Make sure you have the same port number in cors({ origin : [ "http://localhost:3001"]}) and the .env file.

edited Nov 03 '20 at 11:25

Elletlar

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answered Nov 03 '20 at 09:58

tejas e

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3

score 3 · Answer 8 · answered May 16 '21 at 14:28

3

In my case I used "https" instead of "http", check that too.

answered May 16 '21 at 14:28

Amir Mehrnam

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5
5

1

for example, you should use `https://api.coincap.io/v2/assets` Not `api.coincap.io/v2/assets` in Axios URL – paydarsefat May 21 '22 at 08:54

score 1 · Answer 9 · answered May 17 '22 at 11:18

I have resolved my issue by adding this header.

var data = new FormData();
              data.append('request', 'CompaniesData');
           var config = {
                 method: 'post',
                 url: baseUrl, headers:{"Accept":"application/json, text/plain, /","Content-Type": "multipart/form-data"},
                    data : data
                  };
            
                 axios(config)
    .then(function (response) {
      console.log(JSON.stringify(response.data));
    })
    .catch(function (error) {
      console.log(error);
    });

UdayanBKamble · Answer 10 · 2022-08-11T17:15:46.883

1

change the port number of your node server. It took more than 3 hours to solve this error. Solution ended with changing port numer which was initially set to 6000, later set to 3001. Then it worked. My server localhost base url was:

"http://localhost:6000/data"

I changed port number in app.listen() on server and from frontend I call that GET route in async function as await axios.get('http://localhost:3001/data'). It is working fine now.
If you face the address issue: address already in use :::#port

Then on command prompt: killall -9 node

edited Aug 11 '22 at 17:15

answered Aug 11 '22 at 16:46

UdayanBKamble

99
1
7

you saved mine, thank you – ajs.sonawane Jul 11 '23 at 15:02

score 1 · Answer 11 · answered Nov 03 '22 at 16:10

I just want to let you know that after searching for a solution for two days, I was able to solve my error. Since the proxy was the source of the issue, I must configure a proxy in the package.json file, and I have to follow these instructions in the function that uses Axios:

try { await axios.post("user/login", formData).then((res) => { console.log(res.data); }); } catch (error) { console.log(error.response.data.message); }

and in package.json file need to add a proxy:

"proxy": "http://localhost:6000",

for better understand check this documentation: enter link description here

where should I add it? in the client's package.json or the server's package.json? — Gourav Sanyal, Jan 24 '23 at 01:14

score 1 · Answer 12 · answered Feb 04 '23 at 12:12

1

If you are running react native in development while using real device connected via USB(and the API server is being accessed via development machine IP), ensure the development machine and the device are both connected to the same network

answered Feb 04 '23 at 12:12

The Ambidextrous

87
4

score 1 · Answer 13 · answered Apr 19 '23 at 12:17

Even though I had CORS in my project already, I encountered an error with the "network error" flag in axios because I was passing custom headers into axios before the post data.

The post data in axios should always be the second argument, then the custom headers last.

score 0 · Answer 14 · answered Oct 07 '21 at 08:45

This is happening because of restrict-origin-when-cross-origin policy.Browser sends a pre-flight request to know whom the API server wants to share the resources. So you have to set origin there in API server and send some status.After that the browser allow to send the request to the API server.

Here is the code.I am running front-end on localhost:8000 and api server is running on port 6000.

const cors = require("cors");

app.options("*", cors({ origin: 'http://localhost:8000', optionsSuccessStatus: 200 }));

app.use(cors({ origin: "http://localhost:8000", optionsSuccessStatus: 200 }));

I have set origin as my front-end url, If You set it to true , then it will allow only port 8000 to access rosource, and front-end running on port 8000 can not access this resource. Use this middleware before route in api server.

score 0 · Answer 15 · answered Jun 10 '22 at 12:42

In my case, I'm using Hapi.js as the backend, so all I had to do is set the cors value to true as in the code below;

const server = Hapi.server({
       port: 4000,
       host: 'localhost',
       state: {
           strictHeader: false
       },
       routes: {
           cors: true
       }
});

score 0 · Answer 16 · answered May 09 '23 at 12:05

if you are using http:// requests there is a chance to occur this error.

To avoid the u can use https:// base url or u can enable android:usesCleartextTraffic="true" in manifest [question]: Android 8: Cleartext HTTP traffic not permitted

recommended using https: //yoururl/api not http: // your url

score -1 · Answer 17 · answered May 21 '22 at 19:44

i'm using axios in react-native as android and .net as backend, i have same issue but i can't solve the problem. I think it is security problem when i type the url in chrome it warns me about that in emulator.

axios("http://10.0.2.2:5001/api/Users/getall")
  .then((result) => setUsers(result.data.data))
  .then((json) => {
    return json.data;
  })
  .catch((error) => {
    console.error(error);
  })
  .then((response) => response.parse());

React: Axios Network Error

17 Answers17

If Creating an API Using NodeJS

Linked