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#!/usr/bin/python
import json
import asyncio
import logging
import aiohttp
APIURL = "https://api.dc01.gamelockerapp.com/"
class ApiError(Exception):
pass
class Crawler(object):
def __init__(self, token):
"""Sets constants."""
self._apiurl = APIURL
self._token = token
self._pagelimit = 50
async def _req(self, session, path, params):
"""Sends an API request and returns the response dict.
:param session: aiohttp client session.
:type session: :class:`aiohttp.ClientSession`
:param path: URL path.
:type path: str
:param params: Request parameters.
:type params: dict
:return: API response.
:rtype: dict
"""
headers = {
"Authorization": "Bearer " + self._token,
"X-TITLE-ID": "semc-vainglory",
"Accept": "application/vnd.api+json",
"Accept-Encoding": "gzip"
}
retries = 5
while True:
try:
async with session.get(self._apiurl + path, headers=headers,
params=params) as response:
if response.status == 429:
logging.warning("rate limited, retrying")
else:
if response.status > 500:
logging.error("API server error %s",
response.status)
raise ApiError(response.status)
else:
return await response.json()
except (aiohttp.errors.ContentEncodingError,
aiohttp.errors.ServerDisconnectedError,
aiohttp.errors.ClientResponseError,
aiohttp.errors.ClientOSError,
LookupError,
json.decoder.JSONDecodeError) as err:
# API bug?
logging.error("API error '%s', retrying", err)
retries -= 1
if retries == 0:
logging.error("Giving up")
raise ApiError(err)
await asyncio.sleep(5)
async def matches(self, params, region="na"):
"""Queries the API for matches and their related data.
:param region: (optional) Region where the matches were played.
Defaults to "na" (North America).
:type region: str
:param params: Additional filters.
:type params: dict
"""
params["page[offset]"] = 0
params["page[limit]"] = self._pagelimit
async with aiohttp.ClientSession() as session:
while True:
res = await self._req(session,
"shards/" + region + "/matches",
params)
if "errors" in res:
if res["errors"][0].get("title") == "Not Found" \
and params["page[offset]"] > 0:
# a query returned exactly 50 matches
# which is expected, so don't fail.
return
raise ApiError(res["errors"])
yield res
if len(res["data"]) < self._pagelimit:
# asked for 50, got less -> exhausted
break
params["page[offset]"] += params["page[limit]"]
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