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import json
from functools import wraps
from flask import redirect, request, current_app
import re
jsonp_validator = re.compile("^[a-zA-Z0-9_\-.]{1,128}$")
def jsonp(f):
"""Wraps JSONified output for JSONP"""
@wraps(f)
def decorated_function(*args, **kwargs):
callback = request.args.get('callback', False)
if callback and jsonp_validator.match(callback):
content = str(callback) + '(' + str(f(*args,**kwargs).data) + ')'
return current_app.response_class(content, mimetype='application/javascript')
else:
return f(*args, **kwargs)
return decorated_function
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