以文件为内容创建响应答案

【问题标题】：Create response with file as content以文件为内容创建响应
【发布时间】：2021-06-16 13:14:59
【问题描述】：

我想创建一个以 mp4 视频为内容的 http 响应
按照我找到的here 的建议，这就是我目前所拥有的：

    resp = Response()
    resp.status_code = 200
    with open("unit_tests/unit_test_data/testvid 2 - public_2.mp4", "rb") as vid:
        resp._content = vid.read(1024 * 1024)
    resp.headers = {"content-length": "13837851"}

然后将按如下方式使用此响应：

    with open(fname, "wb") as file:
        for data in resp.iter_content(chunk_size=1024):
            size = file.write(data)

但是在第二部分，当我尝试阅读我的回复内容时，我收到以下错误：

    AttributeError: 'NoneType' object has no attribute 'read'

欢迎任何帮助，谢谢！

【问题讨论】：

标签： python request httprequest

【解决方案1】：

这里有多个可以帮助您的逻辑的 sn-ps。（未经测试，因此可能需要一些更正）

myFileNameToSend = "unit_tests/unit_test_data/testvid 2 - public_2.mp4"

第 1 步：将要发送的文件编码为 base64 字符串

import base64
myFileToSend = open(myFileNameToSend, 'rb')
myFileContent = myFileToSend.read()
myFileStringToSend = base64.b64encode(myFileContent).decode('ascii')

第 2 步：实际发送字符串作为响应

from fastapi import Request,FastAPI, File, UploadFile, Form
import requests
api = FastAPI()
@api.get("/test") #this is where your webserver is listening for post requests
def test():
    return {"filename": myFileNameToSend.split("/")[-1],"dataAsAscii":myFileStringToSend}

第 3 步：将 base64 字符串解码回字节

import json
import base64
import requests
jsonReceived = initialRequest.json() #initialRequest is your request object to which you are expecting to get a response
myFileNameReceived = jsonReceived["filename"]
myFileStringReceived = jsonReceived["dataAsAscii"].encode('ascii')
myFileReceived = base64.b64decode(myFileStringReceived)
f = open(myFileNameReceived, 'wb')
f.write(myFileReceived)
f.close()

【讨论】：