我正在尝试编写我的第一个 API。我（在 GPT 的帮助下）编写了一个简单的请求脚本，并将 Dash-API 脚本上传到 Heroku。我从多个远程位置获取输入，并且希望将远程数据添加到通用 Postgres 数据库中。由于存在各种安全层，我不确定 Heroku dash 式应用程序是否可以用作 API。这可能吗？我知道 Heroku 有一个平台 API，但它的目的是用于其他用途。到目前为止，我的错误代码表明以下内容，所以我不确定我的方法是否错误或我的代码错误。谢谢。:
response content: b'<!doctype html>\n<html lang=en>\n<title>405 Method Not Allowed</title>\n<h1>Method Not Allowed</h1>\n<p>The method is not allowed for the requested URL.</p>\n'
import requests
data = {
"sensor": "temperature",
"value": 25.5
}
api_endpoint = 'https://my_app.herokuapp.com/ingest'
token = 'too_many_secrets'
headers = {'Authorization': f'Bearer {token}'}
response = requests.post(api_endpoint, json=data, headers=headers, verify=True)
if response.status_code == 200:
print("Data sent successfully")
else:
print(f"Failed to send data. Status code: {response.status_code}")
print(f'response content: {response.content}')
我的 Heroku API 应用程序
from flask import Flask, request, jsonify
from flask_cors import CORS
import dash
from dash import dcc, html, Input, Output
import json
app = Flask(__name__)
CORS(app)
dash_app = dash.Dash(__name__,)
server = dash_app.server
valid_tokens = ["too_many_secrets"]
dash_app.layout = html.Div(children=[
html.H1(children='Simple Dash App'),
dcc.Link('Ingest Data', href='/ingest'),
html.Div(id='output-message')
])
# Dash callback for the Dash route
@dash_app.callback(
Output('output-message', 'children'),
Input('url', 'pathname')
)
def display_page(pathname):
if pathname == '/ingest':
# This part is for Dash and the URL handling you've defined
return html.Div()
# Flask route for the traditional Flask endpoint
@app.route('/ingest', methods=['OPTIONS', 'POST'])
def handle_ingest():
if request.method == 'OPTIONS':
response = make_response()
response.headers.add('Access-Control-Allow-Origin', '*') # Adjust this to your needs
response.headers.add('Access-Control-Allow-Headers', 'Authorization, Content-Type')
response.headers.add('Access-Control-Allow-Methods', 'GET, POST, OPTIONS')
return response
# Continue with your existing logic for POST requests
token = request.headers.get('Authorization')
if token in valid_tokens:
data = request.json # Assuming the data is sent as JSON
# Perform data validation and write to the database here
# Example: Write data to your Heroku Postgres database
print("Success: Data ingested successfully")
return jsonify({"message": "Data ingested successfully"})
else:
print("Unauthorized user: Your token was Invalid")
return jsonify({"message": "Unauthorized"}), 401
if __name__ == '__main__':
app.run(debug=True)
好吧，经过一周的摇头之后。我想我明白了。 dash 应用程序需要 Procfile 指向 Gunicorn 服务器的入口。
web: gunicorn your_module_name:server
但是，对于 Flask 应用程序，Procfile 需要：
web: gunicorn your_module_name:app
运行 dash 应用程序似乎会阻止 Flask API 工作。不要同时尝试男孩和女孩。