Error:Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource
ASP.NET MVC Core 3.1 API cors config:
services.AddCors(options => options.AddPolicy(CorsPolicy,
builder =>
{ builder
.AllowAnyMethod()
.AllowAnyHeader()
.WithOrigins("https://www.hotff.com",
"https://www.hotff.com:44389","https://localhost:4200",
"http://localhost:4200","https://localhost:44371",
"http://localhost:4300","http://127.0.0.1:8080") //.AllowAnyOrigin()
.SetIsOriginAllowedToAllowWildcardSubdomains()
.AllowCredentials();
}));
This config works from Angular 8 client, no issue on port http://localhost
When the API is deployed on an IIS 10 server the request works from an Edge browser fine but not from Android or Chrome browsers. Tried all solutions I could find, read everything I could find.
I think the issue is the pre-flight request...
Related
I'm having problem with CORS.
My Node.js Server with apollo-server-express(version 3.7)
My problem is CORS is not constant.
My React Project request api server and works well.
But sometimes api server response this error
Access to fetch at 'https://api.example.com/' from origin 'https://example.com' 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.
Why same client request sometime response cors error?
Please Help.
I am developing a Laravel API + Vue.js frontend app. Those 2 projects are on separate servers. I am having a CORS policy problem in production (on local I had, but I managed to fix it).
So basically, there are 2 errors right now. I am having this error:
Access to XMLHttpRequest at '--Laravel url--' from origin '--Vue url--' has been blocked by CORS policy: Request header field content-type is not allowed by Access-Control-Allow-Headers in preflight response.
While my co-worker is getting this error:
Access to XMLHttpRequest at '--Laravel url--' from origin '--Vue url--' 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.
We tried a few things:
Configurating CORS on Laravel side:
setting CORS middleware - no effect
changing CORS config .php file - no effect
Configurating CORS on Vue side:
adding origin header to form - no effect
The response is also displaying in browser as being same-site although it is not.
Anyone can help? We have been searching for answer for nearly 3 days.
As Jazerix answered in a comment, going Sanctum is probably the right way because it has most stuff prepared.
I can't Enable CORS on my API Gateway instance, this is how it looks:
1. Settings:
2. Result:
I've tried a bunch of things like checking the DEFAULT 4XX and DEFAULT 5XX and manually inputting the Access-Control-Allow-Methods as suggested in some posts.
If I hover over the error I get: Invalid Response status code specified.
I'm able to GET using my browser but POST can only be done from Postman. My ReactJS website won't post either, throwing:
Access to XMLHttpRequest at <ENDPOINT> from origin <S3-REACT-BUCKET> has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
I've read that I have my React app should send the CORS headers (haven't got to that) but I can't even Enable CORS in the API Gateway!
That was because No Method Response
You shouldn't manually go on the console to enable CORS. Instead follow this guide from the serverless framework.
In short:
set cors: true in your http event
return {'Access-Control-Allow-Origin': '*','Access-Control-Allow-Credentials': true} in your handler
web api is hosted on secure server and i am accessing it through a path locally it is working fine. but after hosting an api
I am Getting this error while running an application
XMLHttpRequest cannot load https://xxxxx.xxxxapp.net/xxx_API/token. 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:8100' is therefore not allowed access. The response had HTTP status code 400.
Well, your error give you an info about what to do. You are doing request with CORS (Cross-Origin Resource Sharing). It says that your request does not have Access-Control-Allow-Origin request header specified. So you should provide it. More about CORS
try to put this in your ionic.project file
"proxies": [
{
"path": "/api",
"proxyUrl": "https://xxxxx.xxxxapp.net/xxx_API/token"
}
]
}
and change the proxuUrl with your api path
I'm trying to implement a login service on a Web app using Sencha Touch.
I already have a REST service working properly (I can test it using chomr extension Dev HTTP Client).
Now, the request is an Ajax request after doing some research, I've found out that cross-domain requests are protected, according to CORS.
I modified my Ajax client, adding:
useDefaultXhrHeader: false
when constructing the Ajax request, and I added to the headers:
Access-Control-Allow-Headers: x-requested-with
Access-Control-Allow-Origin: *
in my response.
Still using the Dev HTTP Client, I can now see my headers correctly set in the response.
But, in my app, I keep getting the error:
No 'Access-Control-Allow-Origin' header is present on the requested resource
If I use the --disable-web-security parameter when launching Chrome, everything works as it should, headers are sent (or at least, they are not blocked anymore by Chrome), but obviously, this is not the proper way to do it.
Can someone help me out on this?
Please follow the link http://enable-cors.org/server_apache.html and enable cors on your server. You client ajax request is correct but you still need enable cors on the server.