发送，接收，保存带有请求的本地图像文件/ Django Rest Framework

Question

我想从服务器/客户端（带有请求lib ）中发送（例如，requests.post）图像文件，并使用django rest framework应用接收/保存这些文件。 我该怎么做呢？

其次，我想知道一般如何从request.post发送的QueryDict中提取部分。 更具体的说：如何从这组数据中解析并保存_io-Object？

# sending app

file = "path/to/image.jpg"
data = open(file, 'rb')

files = {
     'json': (None, crawlingResultConnectionsJson, 'application/json'),
     'file': (os.path.basename(file), open(file, 'rb'), 'application/octet-stream')
}

url = "http://127.0.0.1:8000/result/" # receiving/saving django rest framework app

r = requests.post(url, files=files)

我已经尝试了很长时间。 您的帮助将不胜感激！ 谢谢！

Answer 1

我找到了完全适合我需要的解决方案。 因为我只发现了发送或接收部分的贡献，所以我将尝试将所有内容放在这里。

由于具有更大的灵活性，我的方法是在单独的请求中传输json和图像。 以下两个应用程序是完全独立的。

发送方的操作如下（无需服务器的应用程序）：

from django.core.serializers.json import DjangoJSONEncoder
import requests # http://docs.python-requests.org/en/master/
import datetime # in case...
import json

### send image stuff ###
urlImages = "http://127.0.0.1:8000/receive-images/"
file = "C:\\path\\to\\filename.jpg" # "\\" windows machine...

# this will probably run in a loop or so to process a bunch of images
with open(file, 'rb') as f:
    filename = "filename.jpg"
    files = {'file': (filename, f)}

    r = requests.post(urlImages, files=files)

print(r) # some logging here

### send data stuff ###
data = data # python data - lists, dicts, whatever
json = json.dumps(data, cls=DjangoJSONEncoder) # DjangoJSONEncoder handles datetime fields
urlData = "http://127.0.0.1:8000/receive-data/"
headers = {'content-type': 'application/json'}

r = requests.post(urlData, json, headers=headers)

print(r) # some logging here

接收方需要运行一台服务器（用于开发的内置django服务器，在生产环境中使用WSGInterface进行apache安装），并且已安装以下代码： http : //www.django-rest-framework.org/

最后，我们有两个视图来处理请求：

from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
from .api_controller import ApiController
from django.core.files.storage import default_storage

class ReceiveImages(APIView): # make sure to nail down corresponding url-confs
    def post(self, request, format=None):

        file = request.data.get('file')
        filename = str(file)

        with default_storage.open('images/' + filename, 'wb+') as destination:
            for chunk in file.chunks():
                destination.write(chunk)

        return Response("ok", status=status.HTTP_200_OK)

class ReceiveData(APIView): # make sure to nail down corresponding url-confs
    def post(self, request, format=None):
        json = request.data

        ApiController().createDataIfNotExists(json) 
        # As my json is quite complex, 
        # I've sourced out the DB-interactions to a controller-like class (coming 
        # from PHP symfony :)) with heavy use of the great 
        # MyModel.objects.get_or_create() method. Also the strptime() method is used 
        # to convert the datetime fields. This could also go here...

        return Response("ok", status=status.HTTP_200_OK)

针对https://stackoverflow.com/a/30195605/6522103使用chunk（）

如果您不同意或认为可以改进，请发表评论！ 谢谢！！