Environment
MacOS 10.15.7 Catalina
1. Install
2. HTTP GET
2.1 Composition
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(main directory)
├app/
│ ├templates/
│ │ └index.html
│ ├static/
│ └app.py
└run.py
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2.2 Source code
app/run.py
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from app.app import app
if __name__ == "__main__":
app.run()
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app/app.py
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from flask import Flask, render_template, request
app = Flask(__name__)
# @app.route("/")
# def hello():
# return "Hello Flask"
@app.route("/")
@app.route("/index")
def index():
name = request.args.get("name")
return render_template("index.html", name=name)
if __name__ == "__main__":
app.run(debug=True)
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app/templates/index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>Hello Flask</h1>
<h2>Get request</h2>
<p>{{name}} was sent</p>
</body>
</html>
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2.3. run webserver
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cd <main directory>
python3 run.py
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Access to http://127.0.0.1:5000/index?name=abcdef
HTML on browser
3. HTTP POST
Directory is the same with above sample.
3.1 Source code
app/app.py
Add below.
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@app.route("/index",methods=["post"])
def post():
user_id = request.form["user_id"]
return render_template("index.html", user_id=user_id)
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templates.html
Add below in <body> section.
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<h2>Post request</h2>
<form action="/index" method="POST">
<input type="text" name="user_id" placeholder="Enter User ID">
<input type="submit" value="Submit">
</form>
<p>{{user_id}} was submitted</p>
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3.2. run webserver
After re-run python3 run.py, you can see:
References
