Modify send content

[mangfu26]

I have an HTTPX client.
I want to encrypt the data sent inside Event Hooks, so I modified request._content directly, but the data sent doesn't seem to change, does anyone know why this is?

# client 

import httpx


client = httpx.Client()


def __req(request: httpx.Request):
    request._content = b'Hello'


client.event_hooks['request'].append(__req)

response = client.post(
    'http://192.168.8.184:10240/test',
    data=b'Test'
)

client.close()

# server

from fastapi import FastAPI, Request


app = FastAPI()

@app.post('/test')
async def test(request: Request):
    '''
    '''
    print(await request.body())

    return {'message': 'Hello'}

# output

INFO: Application startup complete.
b'Test'
INFO: 192.168.8.184:34930 - "POST /test HTTP/1.1" 200 OK

Translated with www.DeepL.com/Translator (free version)

[lovelydinosaur]

Working with private implementation details like that isn't going to be a good route to go down - you shouldn't expect it to work, and even if it did, you might well find that some future version broke it.

It's not clear what actual behaviour you're trying to implement, and why. We'd need a clearer idea of that in order to help you find a better approach.

[mangfu26]

I am trying to develop a microservice framework using FastAPI and HTTPX to encrypt data using RSA algorithm before sending HTTP requests, I am planning to implement RSA encryption in Event Hooks, if I can't implement it in Event Hooks, is there any other way, thanks.

[lovelydinosaur]

I'd probably aim to encrypt it before passing it to httpx (Eg. so it can set the correct Content-Length in cases where it knows that up front.)

Tho you could also look at implementing a custom transport to modify the request before passing it to the connection pool.

[mangfu26]

Thank you for your patient answer, my problem was solved

[lovelydinosaur]

Glad to hear it - if you get a chance please do let us know the approach you took - might come in useful for someone else.