请求在FastAPI中上传多张图片的格式 [英] Requests format for uploading multiple images in FastAPI

问题描述

示例

以下是我尝试上载图像列表的代码：

import requests
import glob
import cv2

path = glob.glob("test_folder/*", recursive=True) # a list of image's path

lst_img = []
for p in path[:3]:
    # img = cv2.imread(p)
    lst_img.append((p, open(p, 'rb'), "image/jpeg"))

data = {"files": lst_img}

url = "http://localhost:6789/" # url api of app

res = requests.post(url=url, data=data)

print(res.status_code)

print(res.text)

说明

我正在尝试通过url API上传图片列表。在这里，我使用了请求(python包)，但可能是我的请求格式错误，所以我无法发布到url API。我收到错误代码422：

"detail":[{"loc":["body","files",0],"msg":"Expected UploadFile, received: <class 'str'>","type":"value_error"}

这是我的请求格式：

{'files': [('test_folder/image77.jpeg', <_io.BufferedReader name='test_folder/image77.jpeg'>, 'image/jpeg'), ('test_folder/image84.jpeg', <_io.BufferedReader name='test_folder/image84.jpeg'>, 'image/jpeg'), ('test_folder/image82.jpeg', <_io.BufferedReader name='test_folder/image82.jpeg'>, 'image/jpeg')]}

我试了很多方法，但总是失败。非常感谢你们帮忙解决这个问题。

环境

• 操作系统：Linux：(Ubuntu 18.04)
• FastAPI版本：0.61.1
• 请求版本：2.24.0
• Python版本：3.7.5

我尝试了，但仍不起作用

lst_img.append(("file", (p, open(p, 'rb'), "image/jpeg")))

我的FastAPI main.py

from typing import List

from fastapi import FastAPI, File, UploadFile
from fastapi.responses import StreamingResponse, FileResponse

app = FastAPI()

@app.post("/")
async def main(files: List[UploadFile] = File(...)):
    # file_like = open(video_path, mode="rb")
    # return StreamingResponse(file_like, media_type="video/mp4")
    return {"filenames": [file.filename for file in files]}

推荐答案

下面是一个使用PYTHON请求和FastAPI上传多个文件(图片)的示例。如果您在上传文件时需要发送额外数据，请查看here。另外，如果您需要async编写保存服务器端的图片，请查看this answer。

app.py

import uvicorn
from fastapi import File, UploadFile, FastAPI
from typing import List

app = FastAPI()


def save_file(filename, data):
    with open(filename, 'wb') as f:
        f.write(data)

@app.post("/upload")
async def upload(files: List[UploadFile] = File(...)):

    # in case you need the files saved, once they are uploaded
    for file in files:
        contents = await file.read()
        save_file(file.filename, contents)

    return {"Uploaded Files": [file.filename for file in files]}
    

if __name__ == '__main__':
    uvicorn.run(app, host='0.0.0.0', port=8000)

test.py

import requests
import glob

path = glob.glob("images/*", recursive=True) # images' path
images = [('files', open(p, 'rb')) for p in path] # or path[:3] to upload the first 3 images
url = 'http://127.0.0.1:8000/upload'
resp = requests.post(url=url, files=images) 
print(resp.json())

这篇关于请求在FastAPI中上传多张图片的格式的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！