有谁知道如何使用Flask服务Angular单页应用程序?
我在提供默认路由“ /”时遇到了麻烦,该默认路由应加载index.html和相关组件。这是我的Flask函数:
@app.route('/') def hello_world(): return send_file('templates/dist/templates/index.html')
当我访问localhost:5000时,我得到一个空的Chrome浏览器窗口:
以及Chrome开发者控制台中的以下错误:
这是在Chrome中显示的内容:
我希望这些错误是因为Flask不知道在哪里可以找到支持文件来渲染Angular组件。按照Angular快速入门教程中的指示,我的index.html大部分为空,其中app- root作为HTML主体元素的占位符:
<body> <app-root></app-root> <script type="text/javascript" src="runtime.js"></script><script type="text/javascript" src="polyfills.js"></script><script type="text/javascript" src="styles.js"></script><script type="text/javascript" src="vendor.js"></script><script type="text/javascript" src="main.js"></script></body>
有谁知道如何告诉Flask让Angular渲染页面?
为了简化设置,请考虑在构建过程中使用Angular CLI将所有文件放置在分发目录中,即通过outputPath在angular.json中指定。您可以assets在构建期间使用angular.json部分移动您的Python文件。
outputPath
assets
"your-project": { "root": "your-project-directory", "sourceRoot": "your-project-directory/src", "projectType": "application", "architect": { "build": { "builder": "@angular-devkit/build-angular:browser", "options": { "outputPath": "dist", "index": "your-project-directory/src/index.html", "main": "your-project-directory/src/main.ts", ... "assets": [ { "glob": "**/*", "input": "your-project-directory/src/assets/", "output": "assets" }, { "glob": "**/*", "input": "your-project-directory/src/python/", "output": "." }
在dist目录的顶层,将您main.py的基本Flask设置与一起放置index.html。注意 static_proxy 以确保提供支持文件。
dist
main.py
index.html
from flask import Flask, send_from_directory app = Flask(__name__) @app.route('/<path:path>', methods=['GET']) def static_proxy(path): return send_from_directory('./', path) @app.route('/') def root(): return send_from_directory('./', 'index.html') if __name__ == '__main__': # This is used when running locally only. When deploying use a webserver process # such as Gunicorn to serve the app. app.run(host='127.0.0.1', port=8080, debug=True) @app.errorhandler(500) def server_error(e): return 'An internal error occurred [main.py] %s' % e, 500