问题

dependecies.py

from fahttperrors import Fahttperror  # 这是一个 HTTP 异常类（不用担心）
from fastapi import Header

async def headercheck(xxx_access: str = Header(...)):

    if xxx_access != 'something':
        return Fahttperror.No_Header

main.py

from fastapi import FastAPI, Query, Depends
from dependencies import headercheck

app = FastAPI(dependencies=[Depends(headercheck)])

@app.get("/item")
async def get_something(x: str):
    return {'x': x,}

问题在于，无论我输入的是“something”还是其他内容，我始终会得到结果。为什么会这样？

dependecies.py

from fahttperrors import Fahttperror #this is http exception class (don't worry)
from fastapi import Header

async def headercheck(xxx_access: str = Header(...)):
    
    if xxx_access != 'something':
        return Fahttperror.No_Header

main.py

from fastapi import FastAPI, Query, Depends
from dependencies import headercheck


app = FastAPI(dependencies=[Depends(headercheck)])

@app.get("/item")
async def get_something(x: str):
    return {'x': x,}

答案1

得分: 2

作为答案也发一下。问题在于您的依赖返回了异常，但要真正停止请求，需要引发异常。只需将 headercheck 更改为：

async def headercheck(xxx_access: str = Header(...)):
    if xxx_access != 'something':
        raise Fahttperror.No_Header

应该解决问题。

async def headercheck(xxx_access: str = Header(...)):
    if xxx_access != 'something':
        raise Fahttperror.No_Header

答案2

得分: 1

你的示例按预期运行 - 但由于你在问题中没有包括你所做的请求，很难说你期望发生什么：

从终端运行 `curl` 测试，我们可以看到预期的行为。首先，没有头部信息：

```bash
$ curl http://localhost:50001/item?x=foo
{ "detail":[ { "loc":[ "header","xxx-access" ],"msg":"field required","type":"value_error.missing" } ] }

使用错误的认证密钥：

$ curl -H "XXX-Access: something123" http://localhost:50001/item?x=foo
{ "detail":"No no" }

使用正确的认证密钥：

$ curl -H "XXX-Access: something" http://localhost:50001/item?x=foo
{ "x":"foo" }

<details>
<summary>英文:</summary>

Your example works as it should - but since you didn&#39;t include the request you&#39;re making in your question, it&#39;s hard to say what you expected to happen:

```python
from fastapi.exceptions import HTTPException
from fastapi import FastAPI, Query, Depends, Header

async def headercheck(xxx_access: str = Header(...)):
    if xxx_access != &#39;something&#39;:
        raise HTTPException(status_code=401, detail=&quot;No no&quot;)


app = FastAPI(dependencies=[Depends(headercheck)])

@app.get(&quot;/item&quot;)
async def get_something(x: str):
    return {&#39;x&#39;: x,}

If we test it using curl, we see that we get the expected behavior. First, without the header:

$ curl http://localhost:50001/item?x=foo
{"detail":[{"loc":["header","xxx-access"],"msg":"field required","type":"value_error.missing"}]}

With the wrong authentication key:

$ curl -H "XXX-Access: something123" http://localhost:50001/item?x=foo
{"detail":"No no"}

And with the correct authentication key:

$ curl -H "XXX-Access: something" http://localhost:50001/item?x=foo
{"x":"foo"}