CODEWITHSUNDEEP
python-3.xfastapi
Himal Acharya
Himal Acharya

Reputation: 1006

Replace server name with fake server name in response header in fastapi

I am using uvicorn as server to run app using fast api. While executing endpoint url in Swagger, following message is shown in response header of server response.

 content-length: 122 
 content-type: application/json 
 date: Sat12 Dec 2020 10:18:55 GMT 
 server: uvicorn

How to change server name to new name as server : firstproject? Following code concatenates server name unciorn with new name

@app.middleware("http")
async def add_custom_header(request, call_next):
    response = await call_next(request)
    response.headers['server'] = 'firstproject'
    return response

This gives the following output

content-length: 122 
 content-type: application/json 
 date: Sat12 Dec 2020 10:19:33 GMT 
 server: uvicornfirstproject

How to change server name to server : firstproject in response header?

EDIT

In start_server.py

 import uvicorn

from app.main import app

if __name__ == "__main__":
    uvicorn.run("start_server:app --header server:firstproject", host="0.0.0.0", port=8000, reload=True)

gives following error

INFO:     Uvicorn running on http://0.0.0.0:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [15256] using statreload
ERROR:    Error loading ASGI app. Attribute "app --header server:firstproject" not found in module "start_server".

I run the code from Visual studio

Upvotes: 6

Views: 5487

Answers (2)

fquinto
fquinto

Reputation: 597

In case of you need to "delete" the "server" header, you can use option --no-server-header

uvicorn my_app:app --no-server-header

If you are running uvicorn from a python file:

if __name__ == '__main__':
    uvicorn.run('my_app:app', server_header=False)

Upvotes: 8

Yagiz Degirmenci
Yagiz Degirmenci

Reputation: 20608

You can set a custom header when running uvicorn.

--header TEXTSpecify custom default HTTP response headers as a Name:Value pair

When you run it like this, it will override the default server name.

uvicorn my_app:app --header server:firstproject

If you are running uvicorn from a python file. You need to pass them as tuple inside a list.

if __name__ == "__main__":
    uvicorn.run("my_app:app", headers=[("server", "firstproject")])

Upvotes: 12

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