In my next.js project I'm trying to send a POST request using axios:
axios.defaults.baseURL = "https://{my-server-url}/api";
useEffect(() => {
axios({
method: "POST",
url: "/build_pages",
data: {
page_id: 3,
},
}).then((res) => {
console.log(res.data);
});
}, []);
I'm getting the following CORS error:
My server is [laravel] php and is deployed on cpanel, but before I deployed my backend to cpanel (i.e. when I was working on localhost) I did not get this error.
How do I turn off this error (note that I don't want to download any web browser extension to fix the CORS error)
I came across this link but it does not say where (which file) to add it to so I'm stuck
Edit: I tried the middleware solution provided in this answer: https://stackoverflow.com/a/69151121/12009071 but also it didn't work, howerver the error changed to:
Access to XMLHttpRequest at 'https://{my-server-url}/api/check_admin_login' from origin 'https://{my-server-url}.vercel.app' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: It does not have HTTP ok status.
This is an API-side error. You have to allow cross origin requests on the API server. Based on your question, I assume your API is NOT the Next.js project.
Therefore, you should check the settings of your server. The next.js POST call is not the issue.
Related
I am new to Ionic framework (with Vuejs) and trying to make simple Crud app. But due to CORS issues, i can't able to login.
Browser console show XMLHttpRequest at 'http://localproject.test/api/login' from origin 'http://localhost:8100' has been blocked by CORS policy
I tried a lot of different solutions, without success Please help.
Thanks in advance.
You will allow CORS from your backend. If you want to resolve CORS issue from your end you will use ionic HTTP native plugin link. This is not recommended because you can't track requests from your network tab.
my suggestion you need to resolve your CORS issue from your backend.
If your app will be running on browser, use Proxy server.
Example: I want to post to http://localproject.test/api/login.
In package.json, I will add this line:
"proxy": "http://localproject.test/api"
My POST request in Login component:
axios
.post("/login", loginData)
.then((response) => {
...
}
return response.data;
})
.catch((error) => {
...
});
This question already has answers here:
How does the 'Access-Control-Allow-Origin' header work?
(19 answers)
Closed 2 years ago.
I'm using GimmeProxy api to get a proxy that I want to use in my vue chrome extension. Unfortunately I get this error:
Access to XMLHttpRequest at 'https://gimmeproxy.com/api/getProxy?get=true&supportsHttps=true&anonimityLevel=1&protocol=http' from origin 'chrome-extension://eamofepokjbdhndoegnmcnmgjhefhhlh' 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.
This is the code I have in my vuex action:
fetchProxyData({ commit }) {
axios({
method: 'get',
baseURL: 'https://gimmeproxy.com/api/getProxy',
params: {
get: true,
supportsHttps: true,
anonimityLevel: 1,
protocol: 'http'
},
headers: {
'Access-Control-Allow-Origin': '*'
}
}).then( (response) => {
console.log(response)
})
Is there a way to fix this?
In your code example, you are attempting to send the CORS headers from the client to the server.
It needs to be the other way around.
The client needs to respond to your request with the 'Access-Control-Allow-Origin': '*' header for this to work.
Can your check, using Chrome Dev tools network tab, that the server is returning the correct access control headers from the GimmeProxy API.
Edit: Upon further inspection, I don't seem to see an access control header on this API endpoint.
What you'll need to do in that case, is set up your own API endpoint as a middleman:
Set up an Express API on a VPS (or alternatively an AWS lambda function).
Create an endpoint that makes a request to gimmeproxy.
Your Chrome extension makes a request to this endpoint via Axios.
The endpoint makes a request to the gimmeproxy API via Axios (it is not a browser, so no cross origin policies are enforced).
Your API returns the response to the client.
It is important to note, that your Express API must return the header 'Access-Control-Allow-Origin': '*' or have an origin matching that of your extension.
I am studying on a toy project using Vue. During development, I made api requests using axios from the front-end and faced a CORS problem. I would really appreciate it if you could give me some information.
Access to XMLHttpRequest at '...' from origin 'http://localhost:8080'
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.
I know CORS issues are caused by security issues when the requested domain and the responding domain are different. Is that so?
Anyway, I saw the information to enter "Access-Control-Allow-Origin": "*" in the request header, but it didn't work.
So I searched for more information. As a result, I created an express server and configured the proxy for the vue project as shown below.
//vue.config.js
module.exports = {
outputDir:"backend/public",
assetsDir:"assets",
configureWebpack: {
devtool: 'source-map'
},
devServer: {
proxy: {
'/api': {
target: 'http://localhost:3000/api',
changeOrigin: true,
pathRewrite: {
'^/api': ''
}
}
}
}
}
And I just applied the basic example code provided by the api site to the default express environment.
The only thing that changed
Not requested from front-end. (A request was made at back-end (express).)
I used the request module, not axios.
Why doesn't a CORS error occur when I make an api request on back-end (express)?
According to MDN, CORS is a mechanism to add security to requests and data transfers between cross-origin browsers and servers, so it won't affect by back-end and proxy servers.
Modern browsers use CORS in APIs such as XMLHttpRequest or Fetch to
mitigate the risks of cross-origin HTTP requests.
I have a standard HTTPS Axios request from my Frontend (which is based on Vue), to the our company's API which is on another server(server use SSL sertificate).
testApi() {
axios.get('https://rng-hub2.staging.rng:8001/rng/3/')
.then(function (response) {
// handle success
console.log(response);
})
.catch(function (error) {
// handle error
console.log(error);
})
.finally(function () {
// always executed
});
},
Which cause an error like this:
In Firefox:
In Chrome the error looks like this:
As I was thinking, in browsed developing tools under tab of Netwerk -> Response, I should also see an error, which is true for Chrome, but eventyally is not true for Firefox.
So Chrome shows me:
But in the Firefox I receive my data in exactly right format:
Have any idea how I can retrieve this data correctly and assign it to the response variable in .then section?
About Cross-Origin Request Blocked error: API's server administrator told me, that he have added my IP to the CORS "trusted list". However I'm not sure, because according to this post: https://jonhilton.net/cross-origin-request-blocked/
in my Response Header I should receive an additional header with my local IP like:
Access-Control-Allow-Origin: http://192.168.32.44
But I'm not.
This proxy staff also didn't work:
How to deal with CORS error on Vue CLI 3?
Please give me hint what am I doing wrong
Found the solution. The problem was deeper then I thought. So short answer is: If you are working in local network, with different API servers, they might be certified with inner corporate CA (Certificate authority) to be able to communicate via HTTPS protocol. So what you need is, to ask from your server administrator to give you private_key with which you gonna sign all the request to a specific API. In guzzle its looks like this:
new GuzzleClient(['verify' => '/path/to/self-signed/cert.pem']);
When I call ubers API from my front end, the call gets blocked with the following error: No 'Access-Control-Allow-Origin' header is present on the requested resource. However, when I call from a node js application the call goes through just fine. The code is the exact same. See below:
$.ajax({
url: "https://api.uber.com/v1/estimates/price",
headers: {
Authorization: "Token " + uberServerToken
},
success: function(result) {
};
This is due to CORS policy enforced by the browser. For cross domain requests the server must include a header Access-Control-Allow-Origin: *. This is likely on purpose as you should never include a server tonken in your client code. For the client you should be using a bearer token. Take a look at the Uber API documentation.
Since the server is at your own control you're free to make API requests to anywhere.