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#!/usr/bin/python3
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"""
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This serves lexonomy plugins
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This almost just returns static files,
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it only does search-and-replace for
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$LOCATION$ -> location of plugin
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every plugin is its own folder and if folder is
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"myplugin" and this website's url is "http://example.com",
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then $LOCATION$ gets the value of http://example.com/myplugin
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"""
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import sys
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import os.path
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import mimetypes
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import hashlib
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from base64 import b64encode
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import redis
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from flask import Flask, Response, request
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app = Flask(__name__)
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redis = redis.Redis(host='localhost', port=6379, db=0)
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URL = "//plugins.lexonomy.cjvt.si"
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REPLACE_STRING = "$LOCATION$"
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@app.route("/")
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def root():
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result = "<html><body><h2>Description</h2><pre>"
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result += sys.modules[__name__].__doc__
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result += "</pre><h2>Url</h2><p>"
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result += URL
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result += "</p></body></html>"
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return result
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@app.route("/<plugin>")
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def plugin_root(plugin):
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status = "" if os.path.isdir(plugin) else " NOT"
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return "Plugin {} was{} found".format(plugin, status)
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def check_cache(full_path):
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file_time = int(os.path.getmtime(full_path))
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old_file_time = 0
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status = False
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if redis.exists(full_path + ":date"):
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try:
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old_file_time = int(redis.get(full_path + ":date"))
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status = old_file_time == file_time
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except ValueError:
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pass
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redis.set(full_path + ":date", file_time)
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return status
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@app.route("/<plugin>/<path:path>")
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def plugin_file(plugin, path):
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full_path = "{}/{}".format(plugin, path)
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if not os.path.isfile(full_path):
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return "File not found", 404
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mt, _encoding = mimetypes.guess_type(path)
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if check_cache(full_path):
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result = redis.get(full_path + ":content")
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status_code = 304
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else:
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replace_with = "{}/{}".format(URL, plugin)
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status_code = 200
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with open(full_path, 'rb') as fp:
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content_bytes = fp.read()
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try:
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content = content_bytes.decode('UTF-8')
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result = content.replace(REPLACE_STRING, replace_with)
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result = result.encode('UTF-8')
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except UnicodeDecodeError:
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result = content_bytes
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redis.set(full_path + ":content", result)
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resp = Response(result, mimetype=mt)
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resp.headers.add('Access-Control-Allow-Origin', '*')
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resp.status_code = status_code
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# return everything if cached response is not allowed
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if 'Cache-Control' in request.headers:
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if request.headers['Cache-Control'] in ('no-cache', 'max-age=0'):
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resp.status_code = 200
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return resp
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if __name__ == '__main__':
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app.run(host="0.0.0.0")
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