flask 框架了解

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Flask

初次认识

内置 session

三方组件全，

缺点：稳定性相对较差，核心要变，三方组件要更新

最简单的使用

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from flask import Flask

app = Flask(__name__)

@app.route("/")
def index():
    return "Hello World"

app.run()

Resopnse 三剑客：

HttpppResponse: return “Hello World”

render:return render_template(“login.html”)

与django中的render 使用一致

redirect: return redirect (“/”)

跳转，重定向

Flask中小儿子：

  1. from flask import jsonify

return jsonify() 返回 json 标准的字符串

content-type：application/json

  1. return send_file()（打开并返回文件内容，自动识别文件格式）

flask中的request

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@app.route("/login", methods=["POST", "GET"])
def login():
    
    return render_template("login.html")

from flask import request
request.method # 请求方式
request.form  # 存放 FormData 中的数据
request.args  # 存放URL中的数据
request.path  # 路由地址
request.host  # 主机地址
request.host_url  # 加 http 的主机地址


先提交的是 POST，先序列化，然后GET，再序列化，

.headers 请求头信息

Host: 127.0.0.1:5000
Connection: keep-alive
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,/;q=0.8,application/signed-exchange;v=b3
Sec-Fetch-Site: none
Accept-Encoding: gzip, deflate, br
Accept-Language: zh-CN,zh;q=0.9
Cookie: csrftoken=a4HVpqpS12F8eRZch58n2ToMJeCerukhbRuy20MKB3cLZTwok8gs8um9PoDkbFhI; sessionid=7ftfeserhzki55h74um33j51lo410lj0

.

request.path—— /login
request.data—— b’’
request.url——- http://127.0.0.1:5000/login
request.values—- CombinedMultiDict([ImmutableMultiDict([]), ImmutableMultiDict([])])
request.range—– None
request.user_agent—– Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36
request.args—— ImmutableMultiDict([])
request.json—— None
request.form—— ImmutableMultiDict([])
request.authorization—— None
request.access_route——- ImmutableList([‘127.0.0.1’])
request.cookies—— {‘csrftoken’: ‘a4HVpqpS12F8eRZch58n2ToMJeCerukhbRuy20MKB3cLZTwok8gs8um9PoDkbFhI’, ‘sessionid’: ‘7ftfeserhzki55h74um33j51lo410lj0’}
request.accept_encodings—— gzip,deflate,br
request.accept_languages—— zh-CN,zh;q=0.9
request.accept_mimetypes—— text/html,image/webp,image/apng,application/xhtml+xml,application/signed-exchange;v=b3,application/xml;q=0.9,/;q=0.8
request.content_length—— None
request.accept_charsets—–
request.files—– ImmutableMultiDict([])
request.blueprint—- None

Jinja2

{{ }} 引用变量

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