我是 Flasgger 的新手，我想弄清楚如何向它添加 POST 请求。
这是我的带有 Flasgger ( app.py) 的 Flask 应用程序：
import datetime
import numpy as np
import pandas as pd
from flask import Flask, jsonify, make_response, Response, request, json
from flasgger import Swagger
def upload_data(file):
df = pd.read_json(file)
df['Rate'] = pd.to_datetime(df['Rate'], format="%Y-%d-%m %H:%M:%S")
df['SI'] = np.nan
return df
server = Flask(__name__)
Swagger(server)
@server.route('/results', methods=['POST', 'GET'])
def ML_results_get():
"""post endpoint
---
tags:
- ML-KA-results
parameters:
- name: body
in: body
required: true
schema:
id: ML-KA-results
type: "object"
required:
- Rate
- KE
- SU
- ML-PC 1
- ML-PC 2
- ML-PC 3
- ML-PC 4
- ML-PC 5
- ML-PC 6
- ML-Totals
- LL-PC 1
- LL-PC 2
- LL-PC 3
- LL-PC 4
- LL-PC 5
- LL-PC 6
- LL-Totals
properties:
Rate:
type: string
default: "9/20/2020 8:50"
KE:
type: string
default: "1"
SU:
type: string
default: " GgG"
ML-PC 1:
type: string
default: "154.11"
ML-PC 2:
type: string
default: "0"
ML-PC 3:
type: string
default: "0"
ML-PC 4:
type: string
default: "0"
ML-PC 5:
type: string
default: "0"
ML-PC 6:
type: string
default: "0"
ML-Totals:
type: string
default: "154.11"
LL-PC 1:
type: string
default: "0"
LL-PC 2:
type: string
default: "0"
LL-PC 3:
type: string
default: "0"
LL-PC 4:
type: string
default: "0"
LL-PC 5:
type: string
default: "0"
LL-PC 6:
type: string
default: "0"
LL-Totals:
type: string
default: "0"
responses:
200:
description: The product inserted in the database
schema:
$ref: '#/definitions/Product'
"""
with server.test_request_context('/results'):
if request.method == 'POST':
reqData = request.get_json(force=True)
df_ML = upload_data(reqData)
return df_ML.to_json()
else:
return print('GET is not supported')
if __name__ == '__main__':
server.run(debug=True, port=85)
现在我想试试 Flasgger 是如何工作的。当我转到http://localhost:85/apidocs/#/ML-KA-results/post_results时，单击“试用”并复制以下 json 文件：
[
{
"Rate": "9/20/2020 8:50",
"KE": 1,
"SU": " GgG",
"ML-PC 1": 154.11,
"ML-PC 2": 0,
"ML-PC 3": 0,
"ML-PC 4": 0,
"ML-PC 5": 0,
"ML-PC 6": 0,
"ML-Totals": 154.11,
"LL-PC 1": 0,
"LL-PC 2": 0,
"LL-PC 3": 0,
"LL-PC 4": 0,
"LL-PC 5": 0,
"LL-PC 6": 0,
"LL-Totals": 0
},
{
"Rate": "9/20/2020 8:50",
"KE": 2,
"SU": " GgG",
"ML-PC 1": 154.27,
"ML-PC 2": 0,
"ML-PC 3": 0,
"ML-PC 4": 0,
"ML-PC 5": 0,
"ML-PC 6": 0,
"ML-Totals": 154.27,
"LL-PC 1": 0,
"LL-PC 2": 0,
"LL-PC 3": 0,
"LL-PC 4": 0,
"LL-PC 5": 0,
"LL-PC 6": 0,
"LL-Totals": 0
}
]
当我单击“执行”时，出现以下错误：
Error: INTERNAL SERVER ERROR
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>TypeError: The view function did not return a valid response. The function either returned None or ended without a return statement. // Werkzeug Debugger</title>
<link rel="stylesheet" href="?__debugger__=yes&cmd=resource&f=style.css"
type="text/css">
<!-- We need to make sure this has a favicon so that the debugger does
not by accident trigger a request to /favicon.ico which might
change the application state. -->
<link rel="shortcut icon"
href="?__debugger__=yes&cmd=resource&f=console.png">
<script src="?__debugger__=yes&cmd=resource&f=jquery.js"></script>
<script src="?__debugger__=yes&cmd=resource&f=debugger.js"></script>
<script type="text/javascript">
var TRACEBACK = 2439966170584,
CONSOLE_MODE = false,
EVALEX = true,
EVALEX_TRUSTED = false,
SECRET = "AhMBlga2HAcS1uO5N5Tz";
</script>
</head>
<body style="background-color: #fff">
<div class="debugger">
<h1>TypeError</h1>
<div class="detail">
<p class="errormsg">TypeError: The view function did not return a valid response. The function either returned None or ended without a return statement.</p>
</div>
<h2 class="traceback">Traceback <em>(most recent call last)</em></h2>
<div class="traceback">
<ul><li><div class="frame" id="frame-2439967649920">
<h4>File <cite class="filename">"C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py"</cite>,
line <em class="line">2464</em>,
in <code class="function">__call__</code></h4>
<div class="source "><pre class="line before"><span class="ws"></span> </pre>
<pre class="line before"><span class="ws"> </span>def __call__(self, environ, start_response):</pre>
<pre class="line before"><span class="ws"> </span>"""The WSGI server calls the Flask application object as the</pre>
<pre class="line before"><span class="ws"> </span>WSGI application. This calls :meth:`wsgi_app` which can be</pre>
<pre class="line before"><span class="ws"> </span>wrapped to applying middleware."""</pre>
<pre class="line current"><span class="ws"> </span>return self.wsgi_app(environ, start_response)</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"> </span>def __repr__(self):</pre>
<pre class="line after"><span class="ws"> </span>return "<%s %r>" % (self.__class__.__name__, self.name)</pre></div>
</div>
<li><div class="frame" id="frame-2439967650760">
<h4>File <cite class="filename">"C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py"</cite>,
line <em class="line">2450</em>,
in <code class="function">wsgi_app</code></h4>
<div class="source "><pre class="line before"><span class="ws"> </span>try:</pre>
<pre class="line before"><span class="ws"> </span>ctx.push()</pre>
<pre class="line before"><span class="ws"> </span>response = self.full_dispatch_request()</pre>
<pre class="line before"><span class="ws"> </span>except Exception as e:</pre>
<pre class="line before"><span class="ws"> </span>error = e</pre>
<pre class="line current"><span class="ws"> </span>response = self.handle_exception(e)</pre>
<pre class="line after"><span class="ws"> </span>except: # noqa: B001</pre>
<pre class="line after"><span class="ws"> </span>error = sys.exc_info()[1]</pre>
<pre class="line after"><span class="ws"> </span>raise</pre>
<pre class="line after"><span class="ws"> </span>return response(environ, start_response)</pre>
<pre class="line after"><span class="ws"> </span>finally:</pre></div>
</div>
<li><div class="frame" id="frame-2439967650032">
<h4>File <cite class="filename">"C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py"</cite>,
line <em class="line">1867</em>,
in <code class="function">handle_exception</code></h4>
<div class="source "><pre class="line before"><span class="ws"> </span># if we want to repropagate the exception, we can attempt to</pre>
<pre class="line before"><span class="ws"> </span># raise it with the whole traceback in case we can do that</pre>
<pre class="line before"><span class="ws"> </span># (the function was actually called from the except part)</pre>
<pre class="line before"><span class="ws"> </span># otherwise, we just raise the error again</pre>
<pre class="line before"><span class="ws"> </span>if exc_value is e:</pre>
<pre class="line current"><span class="ws"> </span>reraise(exc_type, exc_value, tb)</pre>
<pre class="line after"><span class="ws"> </span>else:</pre>
<pre class="line after"><span class="ws"> </span>raise e</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"> </span>self.log_exception((exc_type, exc_value, tb))</pre>
<pre class="line after"><span class="ws"> </span>server_error = InternalServerError()</pre></div>
</div>
<li><div class="frame" id="frame-2439967650144">
<h4>File <cite class="filename">"C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\_compat.py"</cite>,
line <em class="line">39</em>,
in <code class="function">reraise</code></h4>
<div class="source "><pre class="line before"><span class="ws"> </span>import collections.abc as collections_abc</pre>
<pre class="line before"><span class="ws"></span> </pre>
<pre class="line before"><span class="ws"> </span>def reraise(tp, value, tb=None):</pre>
<pre class="line before"><span class="ws"> </span>if value.__traceback__ is not tb:</pre>
<pre class="line before"><span class="ws"> </span>raise value.with_traceback(tb)</pre>
<pre class="line current"><span class="ws"> </span>raise value</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"> </span>implements_to_string = _identity</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"></span>else:</pre>
<pre class="line after"><span class="ws"> </span>iterkeys = lambda d: d.iterkeys()</pre></div>
</div>
<li><div class="frame" id="frame-2439967650872">
<h4>File <cite class="filename">"C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py"</cite>,
line <em class="line">2447</em>,
in <code class="function">wsgi_app</code></h4>
<div class="source "><pre class="line before"><span class="ws"> </span>ctx = self.request_context(environ)</pre>
<pre class="line before"><span class="ws"> </span>error = None</pre>
<pre class="line before"><span class="ws"> </span>try:</pre>
<pre class="line before"><span class="ws"> </span>try:</pre>
<pre class="line before"><span class="ws"> </span>ctx.push()</pre>
<pre class="line current"><span class="ws"> </span>response = self.full_dispatch_request()</pre>
<pre class="line after"><span class="ws"> </span>except Exception as e:</pre>
<pre class="line after"><span class="ws"> </span>error = e</pre>
<pre class="line after"><span class="ws"> </span>response = self.handle_exception(e)</pre>
<pre class="line after"><span class="ws"> </span>except: # noqa: B001</pre>
<pre class="line after"><span class="ws"> </span>error = sys.exc_info()[1]</pre></div>
</div>
<li><div class="frame" id="frame-2439967650928">
<h4>File <cite class="filename">"C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py"</cite>,
line <em class="line">1953</em>,
in <code class="function">full_dispatch_request</code></h4>
<div class="source "><pre class="line before"><span class="ws"> </span>rv = self.preprocess_request()</pre>
<pre class="line before"><span class="ws"> </span>if rv is None:</pre>
<pre class="line before"><span class="ws"> </span>rv = self.dispatch_request()</pre>
<pre class="line before"><span class="ws"> </span>except Exception as e:</pre>
<pre class="line before"><span class="ws"> </span>rv = self.handle_user_exception(e)</pre>
<pre class="line current"><span class="ws"> </span>return self.finalize_request(rv)</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"> </span>def finalize_request(self, rv, from_error_handler=False):</pre>
<pre class="line after"><span class="ws"> </span>"""Given the return value from a view function this finalizes</pre>
<pre class="line after"><span class="ws"> </span>the request by converting it into a response and invoking the</pre>
<pre class="line after"><span class="ws"> </span>postprocessing functions. This is invoked for both normal</pre></div>
</div>
<li><div class="frame" id="frame-2439967650984">
<h4>File <cite class="filename">"C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py"</cite>,
line <em class="line">1968</em>,
in <code class="function">finalize_request</code></h4>
<div class="source "><pre class="line before"><span class="ws"> </span>with the `from_error_handler` flag. If enabled, failures in</pre>
<pre class="line before"><span class="ws"> </span>response processing will be logged and otherwise ignored.</pre>
<pre class="line before"><span class="ws"></span> </pre>
<pre class="line before"><span class="ws"> </span>:internal:</pre>
<pre class="line before"><span class="ws"> </span>"""</pre>
<pre class="line current"><span class="ws"> </span>response = self.make_response(rv)</pre>
<pre class="line after"><span class="ws"> </span>try:</pre>
<pre class="line after"><span class="ws"> </span>response = self.process_response(response)</pre>
<pre class="line after"><span class="ws"> </span>request_finished.send(self, response=response)</pre>
<pre class="line after"><span class="ws"> </span>except Exception:</pre>
<pre class="line after"><span class="ws"> </span>if not from_error_handler:</pre></div>
</div>
<li><div class="frame" id="frame-2439967649864">
<h4>File <cite class="filename">"C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py"</cite>,
line <em class="line">2098</em>,
in <code class="function">make_response</code></h4>
<div class="source "><pre class="line before"><span class="ws"> </span>)</pre>
<pre class="line before"><span class="ws"></span> </pre>
<pre class="line before"><span class="ws"> </span># the body must not be None</pre>
<pre class="line before"><span class="ws"> </span>if rv is None:</pre>
<pre class="line before"><span class="ws"> </span>raise TypeError(</pre>
<pre class="line current"><span class="ws"> </span>"The view function did not return a valid response. The"</pre>
<pre class="line after"><span class="ws"> </span>" function either returned None or ended without a return"</pre>
<pre class="line after"><span class="ws"> </span>" statement."</pre>
<pre class="line after"><span class="ws"> </span>)</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"> </span># make sure the body is an instance of the response class</pre></div>
</div>
</ul>
<blockquote>TypeError: The view function did not return a valid response. The function either returned None or ended without a return statement.</blockquote>
</div>
<div class="plain">
<form action="/?__debugger__=yes&cmd=paste" method="post">
<p>
<input type="hidden" name="language" value="pytb">
This is the Copy/Paste friendly version of the traceback. <span
class="pastemessage">You can also paste this traceback into
a <a href="https://gist.github.com/">gist</a>:
<input type="submit" value="create paste"></span>
</p>
<textarea cols="50" rows="10" name="code" readonly>Traceback (most recent call last):
File "C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py", line 2464, in __call__
return self.wsgi_app(environ, start_response)
File "C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py", line 2450, in wsgi_app
response = self.handle_exception(e)
File "C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py", line 1867, in handle_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\_compat.py", line 39, in reraise
raise value
File "C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py", line 2447, in wsgi_app
response = self.full_dispatch_request()
File "C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py", line 1953, in full_dispatch_request
return self.finalize_request(rv)
File "C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py", line 1968, in finalize_request
response = self.make_response(rv)
File "C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py", line 2098, in make_response
"The view function did not return a valid response. The"
TypeError: The view function did not return a valid response. The function either returned None or ended without a return statement.</textarea>
</form>
</div>
<div class="explanation">
The debugger caught an exception in your WSGI application. You can now
look at the traceback which led to the error. <span class="nojavascript">
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execution (if the evalex feature is enabled), automatic pasting of the
exceptions and much more.</span>
</div>
<div class="footer">
Brought to you by <strong class="arthur">DON'T PANIC</strong>, your
friendly Werkzeug powered traceback interpreter.
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<!--
Traceback (most recent call last):
File "C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py", line 2464, in __call__
return self.wsgi_app(environ, start_response)
File "C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py", line 2450, in wsgi_app
response = self.handle_exception(e)
File "C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py", line 1867, in handle_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\_compat.py", line 39, in reraise
raise value
File "C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py", line 2447, in wsgi_app
response = self.full_dispatch_request()
File "C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py", line 1953, in full_dispatch_request
return self.finalize_request(rv)
File "C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py", line 1968, in finalize_request
response = self.make_response(rv)
File "C:\Users\iakubal\Anaconda3\envs\general_3_6\lib\site-packages\flask\app.py", line 2098, in make_response
"The view function did not return a valid response. The"
TypeError: The view function did not return a valid response. The function either returned None or ended without a return statement.
如何正确编写Flasgger API？