2019-01-28 22:23:35 -08:00
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import os
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import cherrypy
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import logging
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import re
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2019-06-06 08:51:07 -07:00
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from urllib.parse import urlparse
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import ZODB
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from relstorage.storage import RelStorage
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from relstorage.options import Options
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from relstorage.adapters.mysql import MySQLAdapter
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import persistent
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import persistent.list
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import ZODB.FileStorage
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import persistent.mapping
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import BTrees.OOBTree
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def pmap():
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return persistent.mapping.PersistentMapping()
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class Database(object):
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def __init__(self, storage):
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self.db = ZODB.DB(storage)
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self.init_db()
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@staticmethod
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def from_uri(uri):
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"""
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Return a database backed by the storage specified by the passed uri. URIs containing a scheme (scheme://) will
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be checked against installed adapters. Schemeless URIs are assumed to be a file path for flat file storage.
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"""
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parsed = urlparse(uri)
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storage = None
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if parsed.scheme:
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mysql = MySQLAdapter(host=parsed.hostname, port=parsed.port,
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user=parsed.username, passwd=parsed.password,
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db=parsed.path[1:], options=Options(keep_history=False))
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storage = RelStorage(adapter=mysql)
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else:
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storage = ZODB.FileStorage.FileStorage(uri)
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if storage is None:
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raise Exception(f"Unsupported uri {uri}")
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return Database(storage)
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def init_db(self):
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with self.db.transaction() as c:
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if "pastes" not in c.root():
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c.root.pastes = BTrees.OOBTree.BTree()
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def loadpaste(self, name):
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with self.db.transaction() as c:
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return c.root.pastes[name].value
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def writepaste(self, name, contents):
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with self.db.transaction() as c:
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try:
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paste = c.root.pastes[name]
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paste.value = contents
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except KeyError:
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paste = Paste(contents)
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c.root.pastes[name] = paste
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def delpaste(self, name):
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with self.db.transaction() as c:
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del c.root.pastes[name]
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def iterpastes(self, prefix=None):
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with self.db.transaction() as c:
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for name, value in c.root.pastes.items():
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if prefix and not name.startswith(prefix):
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continue
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yield (name, value, )
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class Paste(persistent.Persistent):
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def __init__(self, value):
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self.value = value
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2019-01-28 22:23:35 -08:00
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PAGE = """<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Wastebin</title>
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</head>
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<body>
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<form action="/make" method="post">
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<textarea name="contents" rows="30" cols="120">{data}</textarea><br />
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<input type="text" name="name" placeholder="url name" value="{load}" /><br />
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<input type="submit" value="Go">
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</form>
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</body>
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</html>
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"""
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2019-06-06 08:51:07 -07:00
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RE_NAME_RAW = r'^[a-z0-9_\-/]+$'
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RE_NAME = re.compile(RE_NAME_RAW)
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2019-01-28 22:23:35 -08:00
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class WasteWeb(object):
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def __init__(self, db):
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self.db = db
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2019-01-28 22:23:35 -08:00
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@cherrypy.expose
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def index(self, load=None):
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data = ""
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if load:
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try:
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data = self.db.loadpaste(load)
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except KeyError:
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raise cherrypy.HTTPError(404)
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2019-01-28 22:23:35 -08:00
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yield PAGE.format(data=data.replace("<", "<"), load=load or "")
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@cherrypy.expose
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def make(self, name, contents):
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if not RE_NAME.match(name):
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raise cherrypy.HTTPError(400, f"paste name must match {RE_NAME_RAW}")
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2022-02-01 23:13:47 -08:00
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self.db.writepaste(name, contents.replace("\r", ""))
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2019-06-06 08:51:07 -07:00
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raise cherrypy.HTTPRedirect("/" + name)
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2019-01-28 22:23:35 -08:00
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@cherrypy.expose
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def default(self, *args):
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try:
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if cherrypy.request.method == "DELETE":
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self.db.delpaste(args[0])
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return "OK"
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else:
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cherrypy.response.headers['Content-Type'] = 'text/plain'
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return self.db.loadpaste(args[0]).encode("utf-8")
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except KeyError:
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raise cherrypy.HTTPError(404)
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2019-01-29 16:07:14 -08:00
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@cherrypy.expose
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2019-06-06 08:51:07 -07:00
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def search(self, prefix=""):
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cherrypy.response.headers['Content-Type'] = 'text/plain'
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2019-01-28 22:23:35 -08:00
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2019-06-06 08:51:07 -07:00
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def _work():
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for name, _ in self.db.iterpastes(prefix):
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yield name + "\n"
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return _work()
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2019-01-28 22:23:35 -08:00
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def main():
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import argparse
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import signal
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2019-06-06 08:51:07 -07:00
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parser = argparse.ArgumentParser(description="basic pastebin",
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epilog="supprted databases are file paths and mysql://")
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2019-01-28 22:23:35 -08:00
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2019-06-06 08:51:07 -07:00
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parser.add_argument('-p', '--port', default=int(os.environ.get("PASTE_PORT", 8080)), type=int, help="http port")
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parser.add_argument('-d', '--database', default=os.environ.get("PASTE_DB", None), help="database uri")
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parser.add_argument('--debug', action="store_true", help="enable development options")
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args = parser.parse_args()
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2019-06-06 08:51:07 -07:00
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if not args.database:
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parser.error("the following arguments are required: -d/--database")
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2019-01-28 22:23:35 -08:00
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logging.basicConfig(level=logging.INFO if args.debug else logging.WARNING,
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format="%(asctime)-15s %(levelname)-8s %(filename)s:%(lineno)d %(message)s")
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2019-06-06 08:51:07 -07:00
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web = WasteWeb(Database.from_uri(args.database))
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2019-01-28 22:23:35 -08:00
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cherrypy.tree.mount(web, '/', {'/': {'tools.trailing_slash.on': False}})
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cherrypy.config.update({
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"tools.sessions.on": False,
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"server.socket_host": "0.0.0.0",
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"server.socket_port": args.port,
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"server.thread_pool": 5,
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"engine.autoreload.on": args.debug,
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"log.screen": True
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2019-01-28 22:23:35 -08:00
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})
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def signal_handler(signum, stack):
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logging.critical('Got sig {}, exiting...'.format(signum))
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cherrypy.engine.exit()
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signal.signal(signal.SIGINT, signal_handler)
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signal.signal(signal.SIGTERM, signal_handler)
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try:
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cherrypy.engine.start()
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cherrypy.engine.block()
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finally:
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logging.info("API has shut down")
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cherrypy.engine.exit()
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if __name__ == '__main__':
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main()
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