我有以下代码:
import time
from fastapi import FastAPI, Request
app = FastAPI()
@app.get("/ping")
async def ping(request: Request):
print("Hello")
time.sleep(5)
print("bye")
return {"ping": "pong!"}
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如果我在本地主机上运行我的代码 - 例如http://localhost:8501/ping- 在同一浏览器窗口的不同选项卡中,我得到:
Hello
bye
Hello
bye
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代替:
Hello
Hello
bye
bye
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我已经阅读过有关使用的内容httpx,但仍然无法实现真正的并行化。有什么问题?
python asynchronous concurrent-processing python-asyncio fastapi
我有一个相对简单的 FastAPI 应用程序,它接受查询并从 ChatGPT 的 API 流回响应。ChatGPT 正在流回结果,我可以看到它在输入时被打印到控制台。
不工作的是StreamingResponse通过 FastAPI 返回。相反,响应会一起发送。我真的不知道为什么这不起作用。
这是 FastAPI 应用程序代码:
import os
import time
import openai
import fastapi
from fastapi import Depends, HTTPException, status, Request
from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
from fastapi.responses import StreamingResponse
auth_scheme = HTTPBearer()
app = fastapi.FastAPI()
openai.api_key = os.environ["OPENAI_API_KEY"]
def ask_statesman(query: str):
#prompt = router(query)
completion_reason = None
response = ""
while not completion_reason or completion_reason == "length":
openai_stream = openai.ChatCompletion.create(
model="gpt-3.5-turbo",
messages=[{"role": "user", "content": query}],
temperature=0.0,
stream=True,
)
for …Run Code Online (Sandbox Code Playgroud) I am trying to stream video from a camera using FastAPI, similar to an example I found for Flask. In Flask, the example works correctly, and the video is streamed without any issues. However, when I try to replicate the same functionality in FastAPI, I encounter a problem where the video stream freezes after the first frame.
I have followed the example provided in this Flask code https://www.pyimagesearch.com/2019/09/02/opencv-stream-video-to-web-browser-html-page/ but when I adapt it to FastAPI, the video only displays the …
我正在尝试与指纹设备进行通信。实际上它通过连接发送数据websocket。所以,我想我可以使用 与设备进行通信webscokets。这里我使用FastAPI,但它只接受JSON数据。问题是我需要处理XML数据,但是,我不知道如何以XML格式发送和接受数据。
我想使用从 FastAPI 后端返回的 React 来渲染图像StreamingResponse。图像是数组的形式numpy,是cv2对象类型。
@app.post("/predict")
async def root(file: UploadFile = File(...)):
global model
global store_coordinates
global store_faces
global store_mesh
content = await file.read()
nparr = np.fromstring(content, np.uint8)
bg_img = cv2.imdecode(nparr, cv2.IMREAD_COLOR)
......................
for i in range(len(store_coordinates)):
x, y, w, h = store_coordinates[i]
bg_img [b:b + d, a:a + c] = store_mesh[i]
res,im_png = cv2.imencode(".png", bg_img)
return StreamingResponse(io.BytesIO(im_png.tobytes()), media_type="image/png")
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在这里,我创建了一个 API 端点,其中使用POST请求接收上传的图像,并StreamableResponse(Image)返回 a。如何在 React 前端渲染这个返回的响应?
反应代码:
import React, { Component …Run Code Online (Sandbox Code Playgroud) fastapi ×5
python ×5
asynchronous ×1
flask ×1
image ×1
javascript ×1
openai-api ×1
opencv ×1
reactjs ×1
streaming ×1
websocket ×1
xml ×1