邮递员，Python以及将图像和元数据传递到Web服务 [英] Postman, Python and passing images and metadata to a web service

问题描述

这是一个由两部分组成的问题：我看到过讨论的各个部分，但是似乎无法获得推荐的建议来一起工作。我想创建一个Web服务来存储从调用者传递来的图像及其元数据，并从Postman进行测试调用以确保其正常工作。因此，要通过邮递员将图像（Drew16.jpg）传递到Web服务，看来我需要这样的东西：

this is a two-part question: I have seen individual pieces discussed, but can't seem to get the recommended suggestions to work together. I want to create a web service to store images and their metadata passed from a caller and run a test call from Postman to make sure it is working. So to pass an image (Drew16.jpg) to the web service via Postman, it appears I need something like this:

对于Web服务，我有一些python / flask代码可以读取请求（我尝试过的多种变体之一）：

For the web service, I have some python/flask code to read the request (one of many variations I have tried):

from flask import Flask, jsonify, request, render_template
from flask_restful import Resource, Api, reqparse

...

def post(self, name):
    request_data = request.get_json()
    userId = request_data['UserId']
    type = request_data['ImageType']
    image = request.files['Image']

数据部分没有问题，并且JSON格式，但添加图像一直是个麻烦。我的邮递员配置哪里出问题了？从帖子中读取元数据和文件的实际Python命令集是什么？ TIA

Had no problem with the data portion and straight JSON but adding the image has been a bugger. Where am I going wrong on my Postman config? What is the actual set of Python commands for reading the metadata and the file from the post? TIA

推荐答案

请原谅几乎是博客文章。我之所以发布此信息，是因为尽管您可以在各个地方找到部分答案，但我在任何地方都找不到完整的帖子，这可以为我节省大量时间。问题是您需要故事的双方来进行验证。

Pardon the almost blog post. I am posting this because while you can find partial answers in various places, I haven't run across a complete post anywhere, which would have saved me a ton of time. The problem is you need both sides to the story in order to verify either.

所以我想使用Postman向Python / Flask Web服务发送请求。它必须具有图像以及一些元数据。

So I want to send a request using Postman to a Python/Flask web service. It has to have an image along with some metadata.

以下是邮递员的设置（URL，标题）：

Here are the settings for Postman (URL, Headers):

和正文：

现在进入Web服务。这是一个简单的服务，它将接受请求，打印元数据并保存文件：

Now on to the web service. Here is a bare bones service which will take the request, print the metadata and save the file:

from flask import Flask, request

app = Flask(__name__)        

# POST - just get the image and metadata
@app.route('/RequestImageWithMetadata', methods=['POST'])
def post():
    request_data = request.form['some_text']
    print(request_data)
    imagefile = request.files.get('imagefile', '')
    imagefile.save('D:/temp/test_image.jpg')
    return "OK", 200

app.run(port=5000)

享受！

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