CORS errors on Axios Graphql query - reactjs

Question

I'm trying to use react-axios to query a graphql endpoint but I'm encountering a problem with CORS.
Access to XMLHttpRequest at 'https://rickandmortyapi.com/graphql' from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
Here it is my setup:
const characterQuery = `{
characters(page: 2, filter: { name: "rick" }) {
info {
count
}
results {
name
status
species
gender
image
}
}
}`
const axiosInstance = axios.create({
data: characterQuery,
headers: {"Access-Control-Allow-Origin": "*"}
})
<AxiosProvider instance={axiosInstance}>
<Post url="https://rickandmortyapi.com/graphql">
{(response: any) => {
console.log(response);
}}
</Post>
</AxiosProvider>
Can someone help me? Thanks

Answer 1

CORS is a pain, always, the problem is that the header you pass is the one the server should give you.
You can't force the server to pass the header if they don't already, that the whole point of this protection, avoiding hacker pretending to be other ppl websites.
So the API you are trying to reach must have the CORS header or it will not work
You can play around with fetch see if you have better luck than axios.
Fetch provide some amount of control over your CORS settings, https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch
fetch('https://rickandmortyapi.com/graphql', {
method: 'POST',
mode: 'cors',
headers: { "content-type": "application/json" },
body: JSON.stringify({
query: `{
character(id: 1) {
name
}
}`
})
})
This request work with fetch for me, uppon testing, if the content-type was not set to application/json the server failed with error 500 instead of showing a 400 bad request
Edit again, it works with axios too, are you sure you get a CORS error ?