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app.py
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app.py
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from io import StringIO, BytesIO
import json
import urllib.parse
from boto.s3.connection import S3Connection
from boto.s3.key import Key
from boto.exception import S3ResponseError
from flask import Flask, request, make_response, abort
from flask_cors import cross_origin
import requests
import sentry_sdk
from sentry_sdk import capture_message
from sentry_sdk.integrations.flask import FlaskIntegration
from app_config import AWS_KEY, AWS_SECRET, SENTRY_DSN, IMAGE_SECRET
from sentry_handlers import before_send
app = Flask(__name__)
LEGISTARS = {
'chicago': 'https://ord.legistar.com/View.ashx',
'nyc': 'http://legistar.council.nyc.gov/View.ashx',
'lametro': 'https://metro.legistar.com/View.ashx'
}
WHITELIST = ['ord.legistar.com', 'chicago.legistar.com', 'metro.legistar1.com', 'metro.legistar.com']
sentry_sdk.init(
dsn=SENTRY_DSN,
integrations=[FlaskIntegration()],
before_send=before_send
)
MISSING_PIN_ERROR = 'Could not find image for PIN'
MISSING_DOCUMENT_ERROR = 'Could not find document at URL'
MISSING_IMAGE_ERROR = 'Image does not exist at'
@app.route('/<pin>.jpg')
def index(pin):
s3_conn = S3Connection(AWS_KEY, AWS_SECRET)
bucket = s3_conn.get_bucket('property-image-cache')
s3_key = Key(bucket)
s3_key.key = '{0}.jpg'.format(pin)
if s3_key.exists():
output = BytesIO()
s3_key.get_contents_to_file(output)
else:
image_viewer = 'https://legacy.cookcountyassessor.com/PropertyImage.aspx?pin={0}'
image_url = image_viewer.format(pin)
image = requests.get(image_url)
if 'image/jpeg' in image.headers['Content-Type']:
output = BytesIO(image.content)
s3_key.set_metadata('Content-Type', 'image/jpg')
s3_key.set_contents_from_file(output)
s3_key.set_acl('public-read')
else:
capture_message('{0} {1}'.format(MISSING_PIN_ERROR, pin))
abort(404)
output.seek(0)
response = make_response(output.read())
response.headers['Content-Type'] = 'image/jpg'
return response
@app.route('/<city>/document/')
@cross_origin()
def document(city):
query = urllib.parse.parse_qs(urllib.parse.urlparse(request.url).query)
if not query:
abort(400)
document_url, = query['document_url']
filename, = query['filename']
document_url_parsed = urllib.parse.urlparse(document_url)
if document_url_parsed.netloc not in WHITELIST:
abort(400)
document_query = urllib.parse.parse_qs(document_url_parsed.query)
s3_conn = S3Connection(AWS_KEY, AWS_SECRET)
bucket = s3_conn.get_bucket('councilmatic-document-cache')
s3_key = Key(bucket)
s3_key.key = urllib.parse.quote_plus(document_url)
if s3_key.exists():
output = BytesIO()
s3_key.get_contents_to_file(output)
content_type = s3_key.content_type
filename = s3_key.metadata['filename']
source_url = s3_key.metadata.get('source_url', None)
else:
doc = requests.get(document_url, verify=False)
source_url = doc.url
if doc.status_code == 200:
output = BytesIO(doc.content)
content_type = doc.headers['content-type']
if doc.headers.get('content-disposition'):
filename = doc.headers['content-disposition'].rsplit('=', 1)[1].replace('"', '')
s3_key.set_metadata('content-type', content_type)
s3_key.set_metadata('filename', filename)
s3_key.set_metadata('source_url', source_url)
s3_key.set_contents_from_file(output)
s3_key.set_acl('public-read')
else:
capture_message('{0} {1}'.format(MISSING_DOCUMENT_ERROR, document_url))
abort(doc.status_code)
response = make_response(output.getvalue())
response.headers['Content-Type'] = content_type
response.headers['Source-URL'] = urllib.parse.quote(source_url, safe=":/")
if 'pdf' not in content_type:
response.headers['Content-Disposition'] = 'attachment;filename="{}"'.format(filename)
return response
@app.route('/image/')
def image():
if not request.args.get('key') == IMAGE_SECRET:
abort(401)
try:
image_url = request.args['url']
except KeyError:
abort(400)
parsed_url = urlparse(image_url)
if not parsed_url.netloc:
abort(400)
remote_file = parsed_url.path.rsplit('/', 1)[-1]
s3_conn = S3Connection(AWS_KEY, AWS_SECRET)
bucket = s3_conn.get_bucket('myreps-image-cache')
s3_key = Key(bucket)
s3_key.key = '{0}/{1}'.format(parsed_url.netloc, remote_file)
if s3_key.exists():
output = BytesIO()
s3_key.get_contents_to_file(output)
else:
# For some reason, things hosted on illinois.gov do not have a valid
# SSL cert, at least according to my humble operating system. The
# problem is that it redirects to HTTPS and then the cert is not valid.
# *shrug*
image = requests.get(image_url, verify=False)
if image.status_code == 200 and 'image' in image.headers['Content-Type']:
output = BytesIO(image.content)
s3_key.set_metadata('Content-Type', 'image/jpg')
s3_key.set_contents_from_file(output)
s3_key.set_acl('public-read')
else:
capture_message('{0} {1}'.format(MISSING_IMAGE_ERROR, image_url))
abort(404)
output.seek(0)
response = make_response(output.read())
response.headers['Content-Type'] = 'image/jpg'
return response
@app.route('/test-logging/')
def test_logging():
from uuid import uuid4
base_messages = (
MISSING_PIN_ERROR,
MISSING_DOCUMENT_ERROR,
MISSING_IMAGE_ERROR,
)
for message in base_messages:
capture_message('{0} {1}'.format(message, uuid4()))
raise Exception('Exception raised')
if __name__ == "__main__":
import os
port = int(os.environ.get('PORT', 5000))
app.run(host='0.0.0.0', port=port, debug=True)