python flask 学习与实战

时间 2019-11-29

原文原文链接

路由的另外一种表示，在类视图中会使用

from flask import Flask, make_response

app = Flask(__name__)
def hello():
    return "Hello World!"

app.add_url_rule('/hello', view_func = hello)
if __name__ == '__main__':
    app.run(debug=True)

视图函数与普通函数的区别

这里是返回 status code, content-type(在headers中默认是text/html)，因此当return ''时无回显，以下面，访问这个，会跳转到百度html

from flask import Flask, make_response

app = Flask(__name__)
def hello():
    # status code
    # content-type(http headers text/html)
    headers = {
        'content-type':'text/plain',
        'location':'http://baidu.com'
    }
    #response = make_response('<html></html>', 301)
    #response.headers = headers
    #return response
    return '<html></html>', 301, headers
    #return "<html></html>"
def helloo():
    return "Hello World!"

app.add_url_rule('/hello', view_func = hello)
if __name__ == '__main__':
    app.run(debug=True)

实战

编写一个书籍搜索，我这里先实现搜索分类，书籍搜索含关键字和isbn编号搜索，isbn分为isbn10 isbn13 前者有'-'，0-9组成，后面有0-9数字组成python

from flask import Flask

app = Flask(__name__)

@app.route('/book/search/<q>/<page>')
def search(q, page):
    """
        q  (isbn13 0-9  isbn10'-')
        page
    """
    isbn_or_key = 'key'
    if len(q) == 13 and q.isdigit():
        isbn_or_key = 'isbn'
    short_q = q.replace('-', '')
    if '-' in q and len(short_q) == 10 and short_q.isdgit:
        isbn_or_key = 'isbn'
    pass
if __name__ == '__main__':
    app.run()