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"""App view decorators.""" |
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from functools import wraps |
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from flask import ( |
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abort, |
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request, |
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View Code Duplication |
) |
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def require_headers(headers=[]): |
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"""Check for required headers in a view. |
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@require_headers(headers=['X-Foo']) |
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def view(): |
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pass |
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""" |
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def outer(func, *args, **kwargs): |
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@wraps(func) |
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def inner(*args, **kwargs): |
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if headers: |
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s1, s2 = set(headers), set([h[0] for h in request.headers]) |
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matches = s1.intersection(s2) |
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diff = s1.difference(s2) |
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if len(s1) != len(matches): |
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raise ValueError( |
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'Missing required header(s): {}'.format(list(diff))) |
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return func(*args, **kwargs) |
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return inner |
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View Code Duplication |
return outer |
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def require_cookies(cookies=[]): |
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"""Check for required cookies in a view. |
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@require_cookies(cookies=['csrftoken', 'session']) |
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def view(): |
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pass |
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""" |
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def outer(func, *args, **kwargs): |
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@wraps(func) |
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def inner(*args, **kwargs): |
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if cookies: |
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s1 = set(cookies) |
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s2 = set([k for k, v in request.cookies.items()]) |
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matches = s1.intersection(s2) |
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diff = s1.difference(s2) |
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if len(s1) != len(matches): |
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raise ValueError( |
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'Missing required cookie(s): {}'.format(list(diff))) |
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return func(*args, **kwargs) |
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return inner |
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return outer |
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def require_args(params=[]): |
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"""Check for required args (and values) in a view. |
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@require_args(params=['paginate']) |
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def view(): |
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pass |
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or, if you want to check both key and value: |
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@require_args(params={'paginate': True}) |
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def view(): |
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pass |
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""" |
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def outer(func, *args, **kwargs): |
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@wraps(func) |
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def inner(*args, **kwargs): |
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if params: |
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if isinstance(params, list): |
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s1 = set(params) |
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s2 = set([k for k, v in request.args.items()]) |
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matches = s1.intersection(s2) |
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diff = s1.difference(s2) |
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if len(s1) != len(matches): |
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raise ValueError( |
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'Missing required arg(s): {}'.format(list(diff))) |
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else: |
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for param, val in params.items(): |
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arg = request.args.get(param, None) |
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if arg is None: |
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raise ValueError( |
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'Missing param `{}`'.format(param)) |
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if arg != val: |
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raise ValueError( |
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'Invalid value `{}` ' |
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'for param {}.'.format(arg, param)) |
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return func(*args, **kwargs) |
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return inner |
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View Code Duplication |
return outer |
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def require_form(values=[]): |
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"""Check for required form values. |
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@require_form(values=['name', 'address']) |
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def view(): |
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pass |
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""" |
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def outer(func, *args, **kwargs): |
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@wraps(func) |
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def inner(*args, **kwargs): |
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if request.method == 'POST': |
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if values: |
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s1 = set(values) |
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s2 = set([k for k, v in request.form.items()]) |
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matches = s1.intersection(s2) |
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diff = s1.difference(s2) |
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if len(s1) != len(matches): |
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raise ValueError( |
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'Missing required form ' |
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'field(s): {}'.format(list(diff))) |
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return func(*args, **kwargs) |
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return inner |
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return outer |
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def xhr_only(status_code=415): |
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"""Asssure request is XHR only. |
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@xhr_only() |
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def view(): |
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pass |
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""" |
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def outer(func, *args, **kwargs): |
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@wraps(func) |
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def inner(*args, **kwargs): |
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if not request.is_xhr: |
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# Default to status "unsupported media type". |
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abort(status_code) |
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return func(*args, **kwargs) |
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return inner |
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return outer |
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christabor /
flask_extras
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