I am working on an app using Vue js.
According to my setting I need to pass to a variable to my URL when setting change.
<!-- language: lang-js -->
$.get('http://172.16.1.157:8002/firstcolumn/' + c1v + '/' + c1b, function (data) {
// some code...
});
But when my app hit on URL, it shows the following message.
Failed to load http://172.16.1.157:8002/firstcolumn/2017-03-01/2017-10-26: Redirect from 'http://172.16.1.157:8002/firstcolumn/2017-03-01/2017-10-26' to 'http://172.16.1.157:8002/firstcolumn/2017-03-01/2017-10-26/' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8080' is therefore not allowed access.
In addition to what awd mentioned about getting the person responsible for the server to reconfigure (an impractical solution for local development) I use a change-origin chrome plugin like this:
Moesif Orign & CORS Changer (use to be free but now wants a work email address >_>)
Allow CORS: Access-Control-Allow-Origin
You can make your local dev server (ex: localhost:8080) to appear to be coming from 172.16.1.157:8002 or any other domain.
In case the 2nd plugin link breaks in the future or the plugin writer decides to capitalize off the fame of this thread, open your browser's
plugin marketplace and search "allow cors", there's going to be a
bunch of them.
Thanks all, I solved by this extension on chrome.
Allow CORS: Access-Control-Allow-Origin
If you have control over your server, you can use PHP:
<?PHP
header('Access-Control-Allow-Origin: *');
?>
Ask the person maintaining the server at http://172.16.1.157:8002/ to add your hostname to Access-Control-Allow-Origin hosts, the server should return a header similar to the following with the response-
Access-Control-Allow-Origin: yourhostname:port
Using npm:
To allow cross-origin requests install 'cors':
npm i cors
Add this in the server-side:
let cors = require("cors");
app.use(cors());
When you have this problem with Chrome, you don't need an Extension.
Start Chrome from the Console:
chrome.exe --user-data-dir="C:/Chrome dev session" --disable-web-security
Maybe you have to close all Tabs in Chrome and restart it.
I will assume that you're a front-end developer only and that you don't have access to the backend of the application (regarding the tags of the question).
Short answer on how to properly solve this in your case? You can't, you'll need somebody else.
What is this about?
You need to understand that CORS is a security thing, it's not just here to annoy you just for fun.
It's purpose is to mainly prevent the usage of a (malicious) HTTP call from a non-whitelisted frontend to your backend with some critical mutation.
You could give a look to this YouTube video or any other one really, but I recommend a visual video because text-based explanation can be quite hard to understand.
You also need to understand that if you use Postman or any other tool to try your API call, you will not get the CORS issue. The reason being that those tools are not Web frontends but rather some server-based tools.
Hence, don't be surprised if something is working there but not in your Vue app, the context is different.
Now, how to solve this?
Depending of the framework used by your backend team, the syntax may be quite different but overall, you'll need to tell them to provide something like Access-Control-Allow-Origin: http://localhost:3000 (or any other port you'll be using).
PS: Using Access-Control-Allow-Origin: * would be quite risky because it would allow anybody to access it, hence why a stricter rule is recommended.
If you're using a service, like an API to send SMS, payment, some Google console or something else really, you'll need to allow your localhost in the dashboard of the service. Ask for credentials to your manager or Tech Lead.
If you have access to the backend, you could it yourself as shown here (ExpressJS in this example): https://flaviocopes.com/cors/
How to hack it in a dirty way?
If you're in a damn hurry and want to get something really dirty, you could use a lot of various hacks a listed in the other answers, here's a quick list:
use any extension who is able to create a middleware and forward the request to the backend (it will work because it's not directly coming from your frontend)
force your browser to disable CORS, not sure how this would actually solve the issue
use a proxy, if you're using Nuxt2, #nuxtjs/proxy is a popular one but any kind of proxy (even a real backend will do the job)
any other hack related somehow to the 3 listed above...
At the end, solving the CORS issue can be done quite fast and easily. You only need to communicate with your team or find something on your side (if you have access to the backend/admin dashboard of some service).
I heavily do recommend trying get it right from the beginning because it's related to security and that it may be forgotten down the road...
The approved answer to this question is not valid.
You need to set headers on your server-side code
app.use((req,res,next)=>{
res.setHeader('Access-Control-Allow-Origin','*');
res.setHeader('Access-Control-Allow-Methods','GET,POST,PUT,PATCH,DELETE');
res.setHeader('Access-Control-Allow-Methods','Content-Type','Authorization');
next();
})
You can also try a chrome extension to add these headers automatically.
Hello If I understood it right you are doing an XMLHttpRequest to a different domain than your page is on. So the browser is blocking it as it usually allows a request in the same origin for security reasons. You need to do something different when you want to do a cross-domain request. A tutorial about how to achieve that is Using CORS.
When you are using postman they are not restricted by this policy. Quoted from Cross-Origin XMLHttpRequest:
Regular web pages can use the XMLHttpRequest object to send and receive data from remote servers, but they're limited by the same origin policy. Extensions aren't so limited. An extension can talk to remote servers outside of its origin, as long as it first requests cross-origin permissions.
To add the CORS authorization to the header using Apache, simply add the following line inside either the <Directory>, <Location>, <Files> or <VirtualHost> sections of your server config (usually located in a *.conf file, such as httpd.conf or apache.conf), or within a .htaccess file:
Header set Access-Control-Allow-Origin "*"
And then restart apache.
Altering headers requires the use of mod_headers. Mod_headers is enabled by default in Apache, however, you may want to ensure it's enabled.
I had the same problem in my Vue.js and SpringBoot projects. If somebody work with spring you can add this code:
#Bean
public FilterRegistrationBean simpleCorsFilter() {
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
CorsConfiguration config = new CorsConfiguration();
config.setAllowCredentials(true);
// *** URL below needs to match the Vue client URL and port ***
config.setAllowedOrigins(Collections.singletonList("http://localhost:8080"));
config.setAllowedMethods(Collections.singletonList("*"));
config.setAllowedHeaders(Collections.singletonList("*"));
source.registerCorsConfiguration("/**", config);
FilterRegistrationBean bean = new FilterRegistrationBean<>(new CorsFilter(source));
bean.setOrder(Ordered.HIGHEST_PRECEDENCE);
return bean;
}
I found solution in this article Build a Simple CRUD App with Spring Boot and Vue.js
You are making a request to external domain 172.16.1.157:8002/ from your local development server that is why it is giving cross origin exception.
Either you have to allow headers Access-Control-Allow-Origin:* in both frontend and backend or alternatively use this extension cors header toggle - chrome extension unless you host backend and frontend on the same domain.
Try running this command in your terminal and then test it again.
curl -H "origin: originHost" -v "RequestedResource"
Eg:
If my originHost equals https://localhost:8081/ and my RequestedResource equals https://example.com/
My command would be as below:
curl -H "origin: https://localhost:8081/" -v "https://example.com/"
If you can notice the following line then it should work for you.
< access-control-allow-origin: *
Hope this helps.
Do specify #CrossOrigin(origins = "http://localhost:8081")
in Controller class.
You can solve this temporarily by using the Firefox add-on, CORS Everywhere. Just open Firefox, press Ctrl+Shift+A , search the add-on and add it!
You won't believe this,
Make sure to add "." at the end of the "url"
I got a similar error with this code:
fetch(https://itunes.apple.com/search?term=jack+johnson)
.then( response => {
return response.json();
})
.then(data => {
console.log(data.results);
}).catch(error => console.log('Request failed:', error))
The error I got:
Access to fetch at 'https://itunes.apple.com/search?term=jack+johnson'
from origin 'http://127.0.0.1:5500' 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.
But I realized after a lot of research that the problem was that I did not copy the
right URL address from the iTunes API documentation.
It should have been
https://itunes.apple.com/search?term=jack+johnson.
not
https://itunes.apple.com/search?term=jack+johnson
Notice the dot at the end
There is a huge explanation about why the dot is important quoting issues about DNS and character encoding but the truth is you probably do not care. Try adding the dot it might work for you too.
When I added the "." everything worked like a charm.
I hope it works for you too.
install:
npm i cors
Then include cors():
app.get("/list",cors(),(req,res) =>{
});
In addition to the Berke Kaan Cetinkaya's answer.
If you have control over your server, you can do the following in ExpressJs:
app.use(function(req, res, next) {
// update to match the domain you will make the request from
res.header("Access-Control-Allow-Origin", "YOUR-DOMAIN.TLD");
res.header("Access-Control-Allow-Methods", "GET,HEAD,OPTIONS,POST,PUT");
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
next();
});
https://enable-cors.org/server_expressjs.html
I tried this code,and that works for me.You can see the documentation in this link
var io = require("socket.io")(http, {
cors: {
origin: "*",
methods: ["GET", "POST"]
}
})
The reason that I came across this error was that I hadn't updated the path for different environments.
you have to customize security for your browser or allow permission through customizing security. (it is impractical for your local testing)
to know more about please go through the link.
https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS
These errors may be caused due to follow reasons, ensure the following steps are followed. To connect the local host with the local virtual machine(host). Here, I'am connecting http://localhost:3001/ to the http://abc.test Steps to be followed:
1.We have to allow CORS, placing Access-Control-Allow-Origin: in header of request
may not work. Install a google extension which enables a CORS request.*
2.Make sure the credentials you provide in the request are valid.
3.Make sure the vagrant has been provisioned. Try vagrant up --provision this make the localhost connect to db of the homestead.
Try changing the content type of the header. header:{ 'Content-Type' : 'application/x-www-form-urlencoded; charset=UTF-8;application/json' }
this point is very important.
Another solution to this problem in a specific scenario :
If
AWS APIGW is your backend with authentication enabled and
authentication fails,
your browser may end up complaining about CORS even if CORS is enabled in APIGW. You also need to enable CORS for 4XX as follows
API:YourAPI > Resources > /YourResource > Actions > Enable CORS > Gateway Responses for yourAPI check Default 4XX
Authentication will still fail but it won't look like CORS is the root cause
$.get('https://172.16.1.157:8002/firstcolumn/' + c1v + '/' + c1b, function (data) {
// some code...
});
Just put "https" .
I have used REST API & Web in same laravel project. Both working in localhost. But not in server.
I have used Postman for the REST API checking. I'm sharing my route code below,
This my api.php code.
// Customer registration
Route::post('signup/', "api\CustomerAccountController#customerRegistration");
REST API testing from the server. Go to the link below.
https://drive.google.com/file/d/13N71hqWQFXZcKNzSjr1eqqe7DUhPnnr6/view?usp=sharing
Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException: The GET method is not supported for this route. Supported methods: POST. in file /home1/foresqtn/quizapi.biconconsultants.com/quizapi/vendor/laravel/framework/src/Illuminate/Routing/AbstractRouteCollection.php on line 117
This code is uploaded to the server.
Now I am sharing the localhost response with same code. Go to the below link.
https://drive.google.com/file/d/1gK1cO7tmvG3f6EsYqQS-1n3OpXCrVskr/view?usp=sharing
Now I couldn't find what I'm doing wrong here. I am running same code.
Your valuable response will be appreciated.
Problem Solved
In Postman when I'm trying to send a request using the endpoint, in the end of the URL I'm adding '/' that's why I was getting the above Error. Now the error is resolved.
If you just use "http" instead of "https" your problem will be solved. It worked for me.
If you're route in the auth middleware group, just try to add Bearer token, everything will work
Use case: VueJS/Laravel app has inventory. Calling Magento2 using SOAP API to update Qty from VueJS/Laravel.
Error as shared below:
Access to XMLHttpRequest at
'http://xx.yyy.abc.123/rest/V1/integration/admin/token?username=admin&password=xxxxx'
from origin 'http://192.168.0.x' 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.
Note: I am a beginner in this domain. I might be asking stupid questions. Please bear with me and requesting help here.
Tools/Apps used:
Laravel Framework 7.9.2 /Running on http://192.168.0.x
VueJS /Running on http://192.168.0.x
Magento2 /Running on http://xx.yyy.abc.123
Postman (Tool used to test SOAP API)
Debugging efforts:
URL http://xx.yyy.abc.123/rest/V1/integration/admin/token?username=admin&password=xxxxx
Tried from postman: It works, Apended token into postmane and got the response.
Making AXIOS call from VueJS/Laravel application to Magento2:(Failed)
Origin: http://192.168.0.x
Magento2: http://xx.yyy.abc.123
axios.post("http://xx.yyy.abc.123/rest/V1/integration/admin/token?username=admin&password=xxxxx",
{
})
.then((response) =>
{
console.log("response.data",response.data);
this.apiResponse = response.data;
//this.getproduct();
})
.catch(error =>
{
alert('ERROR GETCATEGORY!!!! No Data found');
console.log(error.response);
});
Checked for 2 days now about CORS error and found that this is enabled by default in Laravel 7. Not sure why I am seeing this error even after using Laravel 7. There are very few answers or solutions specific to VueJS with Laravel 7.
Question:
What does this error means. I thought it is just calling from webpage1 to webpage2, it does not seem to work.
Do I need to make any changes on my VueJS/Laravel application. Am I missing anything further.
Please do let me know if you need any more information to help me in this regards.
Thanks for your help.
Regards,
I had got the same CORS error while working on a Vue.js project. I finally solved this issue just today in the morning. You can resolve this either by building a proxy server or another way would be to disable the security settings of your browser (eg, CHROME) for accessing cross origin apis. Both these solutions had worked for me. The later solution is the easiest solutoion and does not require any mock server or a proxy server to be build. Both these solutions can be resolved at the front end.
You can disable your browser (CHROME) security settings for accessing apis out of the origin by typing the below command on the terminal:
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --user-data-dir="/tmp/chrome_dev_session" --disable-web-security
After running the above command on your terminal, a new chrome window with security settings disabled will open up. Now, run your program (npm run serve / npm run dev) again and this time you will not get any CORS error and would be able to GET request using axios.
Hope this helps!
I have this Laravel App which I'm deplying to Heroku.
I have followed all of the steps until I encountered a problem relating some assets (asset('css/app.css'), for example) refering to http urls, instead of https urls.
I solved that by adding
if(config('app.env')==='production'){
\URL::forceScheme('https');
}
in the boot method of my AppServiceProvider.php file, and it worked.
But now I have encountered another http related problem that the previous code couldn't solve.
I am fetching my data using simplePaginate() function like so
public function index(Question $question){
$answers = $question->answers()->with('user');
return $answers->simplePaginate(3);
}
This code returns me a response with my 3 answers, as well as with a property called 'next_page_url'
which is, still, plain http (not https as i need it to be).
What can I do for this to be https as Heroku requires?
Heroku's load balancing setup means the indication of whether the request is HTTP or HTTPS comes from the X-Forwarded-Proto header. (Laravel also needs the X-Forwarded-For header to get the users' real IP addresses, incidentally.)
By default, Laravel doesn't trust these headers (as in a different setup it might come from a malicious client), so none of the requests will be detected as HTTPS. You can fix this by configuring the Laravel trusted proxy to trust the header.
In the default config, just setting $proxies = '*', will do the trick, and is safe on Heroku because the load balancers can't be bypassed by end users.
The correct way is to change the URL of your app to https://example.com in the configuration file (.env file as an example). Just write APP_URL=https://example.com
But, when you use Heroku - their balancers can route your requests to https://yourDomain.com to your application over HTTP. So, the Laravel app receives the request to http://yourDomain.com and decides that you need a response with HTTP links.
As #seejayoz said you need to configure trusted proxies list for your app.
I think you can use withPath (or setPath alias) :
$pagi=$answers->simplePaginate(3);
$pagi->withPath("https://link/xxx/");
return $pagi;