old_contents: """Web app that serves proselint's API."""
  
  from flask import Flask, request, make_response, current_app
  import subprocess
  import uuid
  import os
  import re
  import json
  from datetime import timedelta
  from functools import update_wrapper
  import urllib2
  
  app = Flask(__name__)
  
  
  def crossdomain(origin=None, methods=None, headers=None,
                  max_age=21600, attach_to_all=True,
                  automatic_options=True):
      """Allow cross-domain requests."""
      if methods is not None:
          methods = ', '.join(sorted(x.upper() for x in methods))
      if headers is not None and not isinstance(headers, basestring):
          headers = ', '.join(x.upper() for x in headers)
      if not isinstance(origin, basestring):
          origin = ', '.join(origin)
      if isinstance(max_age, timedelta):
          max_age = max_age.total_seconds()
  
      def get_methods():
          if methods is not None:
              return methods
  
          options_resp = current_app.make_default_options_response()
          return options_resp.headers['allow']
  
      def decorator(f):
          def wrapped_function(*args, **kwargs):
              if automatic_options and request.method == 'OPTIONS':
                  resp = current_app.make_default_options_response()
              else:
                  resp = make_response(f(*args, **kwargs))
              if not attach_to_all and request.method != 'OPTIONS':
                  return resp
  
              h = resp.headers
  
              h['Access-Control-Allow-Origin'] = origin
              h['Access-Control-Allow-Methods'] = get_methods()
              h['Access-Control-Max-Age'] = str(max_age)
              if headers is not None:
                  h['Access-Control-Allow-Headers'] = headers
              return resp
  
          f.provide_automatic_options = False
          f.required_methods = ['OPTIONS']
          return update_wrapper(wrapped_function, f)
      return decorator
  
  
  @app.route('/v1/', methods=["GET"])
  @crossdomain(
      origin='*', headers=['Origin, X-Requested-With, Content-Type, Accept'])
  def lint():
      """Run proselint on the provided text and return the results."""
      id = uuid.uuid4()
      filename = os.path.join("tmp", "{}.md".format(id))
  
      text = urllib2.unquote(request.values['text'])
  
      with open(filename, "w+") as f:
          f.write(text)
  
      out = subprocess.check_output("proselint {}".format(filename), shell=True)
  
      r = re.compile(
          "(?:.*).md:(?P<line>\d*):(?P<column>\d*): (?P<err>\w{6}) (?P<msg>.*)")
  
      out2 = sorted([r.search(line).groupdict() for line in out.splitlines()])
  
      return json.dumps(out2)
  
  
  if __name__ == '__main__':
      app.debug = True
      app.run()
  
new_contents: """Web app that serves proselint's API."""
  
  from flask import Flask, request, jsonify
  import subprocess
  from flask_cors import CORS, cross_origin
  import uuid
  import os
  import re
  import urllib2
  import json
  
  app = Flask(__name__)
  cors = CORS(app)
  app.config['CORS_HEADERS'] = "Origin, X-Requested-With,Content-Type, Accept"
  
  
  @app.route('/v1/')
  @cross_origin()  # allow all origins all methods.
  def lint():
      """Run linter on the provided text and return the results."""
      id = uuid.uuid4()
      filename = os.path.join("tmp", "{}.md".format(id))
  
      text = urllib2.unquote(request.values['text'])
  
      with open(filename, "w+") as f:
          f.write(text)
  
      out = subprocess.check_output("proselint {}".format(filename), shell=True)
  
      r = re.compile(
          "(?:.*).md:(?P<line>\d*):(?P<column>\d*): (?P<err>\w{6}) (?P<msg>.*)")
  
      out2 = sorted([r.search(line).groupdict() for line in out.splitlines()])
  
      return json.dumps(out2)
  
  
  if __name__ == '__main__':
      app.debug = True
      app.run()
  
subject: Allow cross domain requests