[学习记录]flask中的一些http方法

1.对于post方法与get方法采用不同的响应

以官方文档demo为例

@app.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        session['username'] = request.form['username']
        return redirect(url_for('index'))
    return '''
        <form action="" method="post">
            <p><input type=text name=username>
            <p><input type=submit value=Login>
        </form>
    '''

如果是get方法，则返回登陆表单

如果是post方法，则记录会话内容并重定向到index

2.重定向与错误

from flask import abort, redirect, url_for

@app.route('/')
def index():
    return redirect(url_for('login'))

@app.route('/login')
def login():
    abort(401)
    this_is_never_executed()

通过abort可以直接返回客户端一个指定的响应码，redirect则返回302，并附上重定向后的url地址

3.请求对象

用户的request请求被处理成一个对象，从flask中导入request后可以直接调用request查看请求中的属性，内容非常多

def printrequest():
    print(request.accept_charsets)
    print(request.accept_encodings)
    print(request.accept_languages)
    print(request.accept_mimetypes)
    print(request.access_route)
    print(request.application)
    print(request.args)
    print(request.authorization)
    print(request.base_url)
    print(request.blueprint)
    print(request.cache_control)
    print(request.charset)
    print(request.close)
    print(request.content_encoding)
    print(request.content_length)
    print(request.content_md5)
    print(request.content_type)
    print(request.cookies)
    print(request.data)
    print(request.date)
    print(request.dict_storage_class)
    print(request.disable_data_descriptor)
    print(request.encoding_errors)
    print(request.endpoint)
    print(request.environ)
    print(request.files)
    print(request.form)
    print(request.form_data_parser_class)
    print(request.from_values)
    print(request.full_path)
    print(request.get_data)
    print(request.get_json)
    print(request.headers)
    print(request.host)
    print(request.host_url)
    print(request.if_match)
    print(request.if_modified_since)
    print(request.if_none_match)
    print(request.if_range)
    print(request.if_unmodified_since)
    print(request.input_stream)
    print(request.is_json)
    print(request.is_multiprocess)
    print(request.is_multithread)
    print(request.is_run_once)
    print(request.is_secure)
    print(request.is_xhr)
    print(request.json)
    print(request.list_storage_class)
    print(request.make_form_data_parser)
    print(request.max_content_length)
    print(request.max_form_memory_size)
    print(request.max_forwards)
    print(request.method)
    print(request.mimetype)
    print(request.mimetype_params)
    print(request.on_json_loading_failed)
    print(request.parameter_storage_class)
    print(request.path)
    print(request.pragma)
    print(request.query_string)
    print(request.range)
    print(request.referrer)
    print(request.remote_addr)
    print(request.remote_user)
    print(request.routing_exception)
    print(request.scheme)
    print(request.script_root)
    print(request.shallow)
    print(request.stream)
    print(request.trusted_hosts)
    print(request.url)
    print(request.url_charset)
    print(request.url_root)
    print(request.url_rule)
    print(request.user_agent)
    print(request.values)
    print(request.view_args)
    print(request.want_form_data_parsed)