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flask中static_folder与static_url_path的区别与联系

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12/02
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# -*- coding:utf-8 -*-

from flask import Flask, url_for

app1 = Flask(__name__, static_folder='mystatic', static_url_path='/myurl', template_folder='mytemplate')

app2 = Flask(__name__)

app3 = Flask(__name__, static_url_path='')

@app1.route('/')

def hello_world():

    return 'Hello World!'

@app1.route("/css")

def static_css():

    return url_for('static', filename='style.css')

@app1.route("/js")

def static_js():

    return url_for('static', filename='login.js')

# @app.route("/ss")

# def static():

#     return "hello ss!"

# AssertionError: View function mapping is overwriting an existing endpoint function: static

# 不允许重复定义内部约束方法static

if __name__ == '__main__':

    print("1--------------------")

    print(app1.__dict__)

    print app1.view_functions['static'].__dict__

    print("2--------------------")

    print app2.__dict__

    print("3--------------------")

    print app3.__dict__

    # app1.run()

    # app2.run(port=5001)

    # app3.run(port=5002)

目录结构 



flask_simply_dome

    -mystatic

        --login.js  -->"this is a test login.js"

    -static

        --login.js  -->"this is app3 or app2 login.js"

    asimply_app.py


# curl "http://127.0.0.1:5000/css"

/myurl/style.css

# curl "http://127.0.0.1:5000/js"

/myurl/login.js

# curl "http://127.0.0.1:5000/myurl/login.js"

"this is a test login.js"

# curl "http://127.0.0.1:5001/static/login.js"

"this is app3 or app2 login.js"

# curl "http://127.0.0.1:5002/login.js"

"this is app3 or app2 login.js"

对比各app的属性 

1--------------------

{

	'subdomain_matching': False,

	'error_handler_spec': {},

	'_before_request_lock': < thread.lock object at 0x0000000002619D50 > ,

	'before_request_funcs': {},

	'teardown_appcontext_funcs': [],

	'shell_context_processors': [],

	'after_request_funcs': {},

	'cli': < flask.cli.AppGroup object at 0x0000000002EF0278 > ,

	'_blueprint_order': [],

	'before_first_request_funcs': [],

	'view_functions': {

		'static_css': < function static_css at 0x0000000002EF87B8 > ,

		'static_js': < function static_js at 0x0000000002EF8828 > ,

		'hello_world': < function hello_world at 0x0000000002EF8748 > ,

		'static': < bound method Flask.send_static_file of < Flask 'asimply_app' >>

	},

	'instance_path': 'D:\\myself\\flask_simply_dome\\instance',

	'teardown_request_funcs': {},

	'url_value_preprocessors': {},

	'config': < Config {

		'JSON_AS_ASCII': True,

		'USE_X_SENDFILE': False,

		'SESSION_COOKIE_SECURE': False,

		'SESSION_COOKIE_PATH': None,

		'SESSION_COOKIE_DOMAIN': None,

		'SESSION_COOKIE_NAME': 'session',

		'MAX_COOKIE_SIZE': 4093,

		'SESSION_COOKIE_SAMESITE': None,

		'PROPAGATE_EXCEPTIONS': None,

		'ENV': 'production',

		'DEBUG': False,

		'SECRET_KEY': None,

		'EXPLAIN_TEMPLATE_LOADING': False,

		'MAX_CONTENT_LENGTH': None,

		'APPLICATION_ROOT': '/',

		'SERVER_NAME': None,

		'PREFERRED_URL_SCHEME': 'http',

		'JSONIFY_PRETTYPRINT_REGULAR': False,

		'TESTING': False,

		'PERMANENT_SESSION_LIFETIME': datetime.timedelta(31),

		'TEMPLATES_AUTO_RELOAD': None,

		'TRAP_BAD_REQUEST_ERRORS': None,

		'JSON_SORT_KEYS': True,

		'JSONIFY_MIMETYPE': 'application/json',

		'SESSION_COOKIE_HTTPONLY': True,

		'SEND_FILE_MAX_AGE_DEFAULT': datetime.timedelta(0, 43200),

		'PRESERVE_CONTEXT_ON_EXCEPTION': None,

		'SESSION_REFRESH_EACH_REQUEST': True,

		'TRAP_HTTP_EXCEPTIONS': False

	} > ,

	'_static_url_path': '/myurl',

	'template_context_processors': {

		None: [ < function _default_template_ctx_processor at 0x0000000002ED9BA8 > ]

	},

	'template_folder': 'mytemplate',

	'blueprints': {},

	'url_map': Map([ < Rule '/css' (HEAD, OPTIONS, GET) - > static_css > , <

		Rule '/js' (HEAD, OPTIONS, GET) - > static_js > , <

		Rule '/' (HEAD, OPTIONS, GET) - > hello_world > , <

		Rule '/myurl/<filename>' (HEAD, OPTIONS, GET) - > static >

	]),

	'name': 'asimply_app',

	'_got_first_request': False,

	'import_name': '__main__',

	'root_path': 'D:\\myself\\flask_simply_dome',

	'_static_folder': 'mystatic',

	'extensions': {},

	'url_default_functions': {},

	'url_build_error_handlers': []

}

{}

1--------------------

{

	'subdomain_matching': False,

	'error_handler_spec': {},

	'_before_request_lock': < thread.lock object at 0x0000000002619D70 > ,

	'before_request_funcs': {},

	'teardown_appcontext_funcs': [],

	'shell_context_processors': [],

	'after_request_funcs': {},

	'cli': < flask.cli.AppGroup object at 0x0000000002EF03C8 > ,

	'_blueprint_order': [],

	'before_first_request_funcs': [],

	'view_functions': {

		'static': < bound method Flask.send_static_file of < Flask 'asimply_app' >>

	},

	'instance_path': 'D:\\myself\\flask_simply_dome\\instance',

	'teardown_request_funcs': {},

	'url_value_preprocessors': {},

	'config':同上,

	'_static_url_path': None,

	'template_context_processors': {

		None: [ < function _default_template_ctx_processor at 0x0000000002ED9BA8 > ]

	},

	'template_folder': 'templates',

	'blueprints': {},

	'url_map': Map([ < Rule '/static/<filename>' (HEAD, OPTIONS, GET) - > static > ]),

	'name': 'asimply_app',

	'_got_first_request': False,

	'import_name': '__main__',

	'root_path': 'D:\\myself\\flask_simply_dome',

	'_static_folder': 'static',

	'extensions': {},

	'url_default_functions': {},

	'url_build_error_handlers': []

}

2--------------------

{

	'subdomain_matching': False,

	'error_handler_spec': {},

	'_before_request_lock': < thread.lock object at 0x00000000026A3DB0 > ,

	'before_request_funcs': {},

	'teardown_appcontext_funcs': [],

	'shell_context_processors': [],

	'after_request_funcs': {},

	'cli': < flask.cli.AppGroup object at 0x0000000002FFB5F8 > ,

	'_blueprint_order': [],

	'before_first_request_funcs': [],

	'view_functions': {

		'static': < bound method Flask.send_static_file of < Flask 'asimply_app' >>

	},

	'instance_path': 'D:\\myself\\flask_simply_dome\\instance',

	'teardown_request_funcs': {},

	'url_value_preprocessors': {},

	'config': 同上,

	'_static_url_path': '',

	'template_context_processors': {

		None: [ < function _default_template_ctx_processor at 0x0000000002FDEBA8 > ]

	},

	'template_folder': 'templates',

	'blueprints': {},

	'url_map': Map([ < Rule '/<filename>' (HEAD, OPTIONS, GET) - > static > ]),

	'name': 'asimply_app',

	'_got_first_request': False,

	'import_name': '__main__',

	'root_path': 'D:\\myself\\flask_simply_dome',

	'_static_folder': 'static',

	'extensions': {},

	'url_default_functions': {},

	'url_build_error_handlers': []

}

3----------------------

"""

结论 

static_url_path主要用于改变url的path的，静态文件放在static下面，所以正常情况url是static/filename ，但是可以通过static_url_path来改变这个url

static_folder主要是用来改变url的目录的，默认是static，可以通过这个变量来改变静态文件目录。

要是项目是前后端分离的话，那这里的配置也就没影响了。

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