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pythonfastapiuvicorn

Fastapi returns 404 when accessing URL in the browser

I am learning fastapi and created the sample following application:

from fastapi import FastAPI
import uvicorn
app = FastAPI()

@app.get("/hello")
async def hello_world():
   return {"message": "hello_world"}

if __name__== "__main__":
   uvicorn.run(app, host="127.0.0.1", port=8080)

The server starts fine but when I test the url in browser I am getting the following error:

{"detail": "Not Found"}

and this error in the log:

"GET / HTTP /" 404 Not Found

I noticed another weird problem, when I make some error its not detecting the error and still starting the server. For example if I change the function like the following:

@app.get("/hello")
async def hello_world():
   print (sample)
   return {"message": "hello_world"}

It should have thrown the error:

NameError: "sample" not defined

but it still is starting the server. Any suggestions will be helpful.

Solution

  • always add the trailing slash after the path, had the same issue, took me hours to debug