So I am trying to upload a file using React Js ant design upload component now the issue I am facing is that whenever I try to submit an image I received the following error:
Access to fetch at 'https://freeimage.host/api/1/upload' from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.
I have attached the code that I have written to upload and handle file submissions.
I would try adding headers to the fetch inside your handleSubmission arrow function and stringify the body.
fetch('https://freeimage.host/api/1/upload', {
key: apiKey,
method: 'POST',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify(formData),
})
If you are using your backend as node js add following code to it
const cors = require("cors");
const corsOpts = {
origin: "*",
credentials: true,
};
app.use(cors(corsOpts));
Related
need help for ReactJs. I still learning reactJs to fetch data from PHP backend. I'm using Xampp as my local server. but when i integrate fetch function on ReactJs, i got CORS policy error.
here is my code from on my App.jsx
useEffect(() => {
fetch("http://localhost:81/opencart/index.php?route=api/create", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({ items: [{ id: "xl-tshirt" }] }),
})
.then((res) => res.json())
.then((data) => setClientSecret(data.clientSecret));
}, []);
On my reactJs package.json file i added this
"proxy": "http://localhost:81/"
but still display error on browser console
Access to fetch at 'http://localhost:81/opencart/index.php?route=api/create' from origin 'http://localhost:3000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.
How do I resolve this?
CORS issue is definitely coming from Server. So the ideal way is to set your server to accept your request from cross origin.
Seems you are working with server built with PHP, then check your backend server to add CORS configuration.
For Express.js and others are having several way to add it such as adding 'cors` middleware.
I am getting the following error in my ReactJS project:
"access to fetch has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource
If an opaque serves your need set the request mode to 'no-cors' to fetch the resource with CORS disabled."
This is how I send requests to the backend:
export const sendRequest = async ( endpoint = '' ,
method = 'GET', body) => {
const response = await fetch(`${url}${endpoint}`, {
method,
headers: { "Content-Type": "application/json" },
body: JSON.stringify(body)
})
const data = await response.json();
return data;
}
I thought first that it is a backend problem but I checked there, found backend CORS Access is enabled for the same headers and client.
Any modifications should I do to the function above??
There an npm module called cors. You can install it in your backend. If you are using ExpressJS, you can just use cors as an middleware using app.use(cors()). With the equivalent header set in the request, it should work
I have built API in Google Cloud Function. The CORS error occurs when I try to fetch API directly. Although I added Access-Control-Allow-Origin, it failed.
The error:
'https://xxxxxxx.com' from origin 'http://localhost:3000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.
const apiURL = 'https://xxxxxxx.com'
const headers = new Headers();
headers.set("Content-type", "application/json");
headers.set("Access-Control-Allow-Origin", "*");
const createRes = await fetch(
`${apiURL}/testFetch`,
{
method: "POST",
headers: headers,
body: JSON.stringify({
test: "test"
}),
}
);
Access-Control-Allow-Origin is a response header. It should be a part of your response, not the request. Please ensure that your API returns the corresponding header.
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Access-Control-Allow-Origin
I am trying to integrate stripe payment gateway in my react project but cors related issue occur.
Can any one help me to resolve this.
"Access to fetch at 'https://connect.stripe.com/oauth/token' from origin 'http://localhost:3000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled."
But it works fine when I am disabling the cors in chrome browser. Is there any alternate how to integrate stripe payment gateway in reactjs project?
My code:
const bodyFormData = new FormData()
bodyFormData.append("client_secret", "");
bodyFormData.append("code", code);
bodyFormData.append("grant_type", "authorization_code");
fetch("https://connect.stripe.com/oauth/token", {
method: 'POST',
body: JSON.stringify(userData),
headers:{
Accept:'application/json',
'Content-Type': 'application/json; charset=utf-8',
'Access-Control-Allow-Origin':"*",
OPTIONS: '',
}
})
.then((response) => response.json())
.then((res) => {
console.log(res);
resolve(res);
})
.catch((error) => {
reject(error);
});
It looks like you're making that call to complete the connection from frontend React code in a browser. You can't do that and it will never work, since it uses your Stripe secret key which should never be on the frontend.
Instead you should make this call from a backend server route after the user is redirected from the OAuth page.
In my React app I am trying to make a GET request from my heroku server to get a list of users:
https://blablabla.heroku.com/users
using the following request:
const sendSearch = fetch('/https://blablabla.heroku.com/users', {credentials: 'same-origin'})
function loadMyUsers(data) {
data.json().then((jsonData) => {
// console.log(jsonData)
})
}
sendSearch.then(loadMyUsers)}
However I get the following error:
Fetch API cannot load https://blablabla.heroku.com/users.
Response to preflight request doesn't pass access control check: No
'Access-Control-Allow-Origin' header is present on the requested
resource. Origin 'http://localhost:8080' is therefore not allowed
access. If an opaque response serves your needs, set the request's mode
to 'no-cors' to fetch the resource with CORS disabled.
I tried changing my Fetch method to many things similar to:
const sendSearch = fetch('https://blablabla.heroku.com/users',{
method: 'GET',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json',
'mode': 'no-cors'
}
})
but the problem persists.
How do I make the cross domain request?
On your heroku server you should add Access-Control-Allow-Origin: * to your response headers, or more specific Access-Control-Allow-Origin: http://localhost:8080 if you wish.
On your production server though, you probably won't need this header, unless you have very good reason for cross origin requests.