quivr: [Bug]: CORS header 'Access-Control-Allow-Origin' missing

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Hello,

The “CORS header ‘Access-Control-Allow-Origin’ missing” error you’re encountering is likely due to the origin ‘http://somehost:3000’ not being included in the list of allowed origins in the CORS middleware configuration of Quivr.

To resolve this issue, you need to add ‘http://somehost:3000’ to the list of allowed origins in your cors.py file. Here’s how you can do it:

from fastapi.middleware.cors import CORSMiddleware

origins = [
    "http://localhost",
    "http://localhost:3000",
    "http://localhost:3001",
    "https://quivr.app",
    "https://www.quivr.app",
    "http://quivr.app",
    "http://www.quivr.app",
    "http://somehost:3000",  # Add this line
    "*",
]


def add_cors_middleware(app):
    app.add_middleware(
        CORSMiddleware,
        allow_origins=origins,
        allow_credentials=True,
        allow_methods=["*"],
        allow_headers=["*"],
    )

After making this change, your application should allow requests from ‘http://somehost:3000’, and you should no longer see the CORS error.

This solution is based on the current CORS middleware configuration in the Quivr codebase, which allows requests from the following origins:

• “http://localhost”
• “http://localhost:3000”
• “http://localhost:3001”
• “https://quivr.app”
• “https://www.quivr.app”
• “http://quivr.app”
• “http://www.quivr.app”
• “*”

It also allows all methods and headers, and credentials are allowed as well.

Please let me know if this resolves your issue or if you need further assistance.

Best regards.

Sources

• [Issue] CORS error
• has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource.
• backend/middlewares/cors.py

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So, it seems like backend errors in code are also triggering the CORS errors.

I can confirm this. Had backend errors with file uploads and CORS issue appeared again.

I got the same issue too, and I already set the web domain in cors.py.