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Optimized regex

This commit is contained in:
bitscuit 2021-05-09 12:51:53 +02:00
parent f40b2c809b
commit d88f95abfa
1 changed files with 12 additions and 4 deletions
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16
main.py
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@ -40,7 +40,7 @@ except IOError as e:
log.warn("Couldn't open 'config.json'")
log.warn("%s"%e)
log.info("Creating default configuration file...")
config = {"INDEX_URL":"https://bitscuit.be/", "MAX_CONTENT_LENGTH":500000, "REQUESTS_PER_MINUTE":10, "HOUR_START":7, "HOUR_STOP":23}
config = {"INDEX_URL":"https://bitscuit.be/", "MAX_CONTENT_LENGTH":500000, "REQUESTS_PER_MINUTE":10, "HOUR_START":7, "HOUR_STOP":23, "REGEX_CHUNK_SIZE":5000}
f = open("config.json", "w")
json.dump(config, f, indent="\t")
f.close()
@ -58,6 +58,7 @@ MAX_CONTENT_LENGTH = config["MAX_CONTENT_LENGTH"]
REQUESTS_PER_MINUTE = config["REQUESTS_PER_MINUTE"]
HOUR_START = config["HOUR_START"]
HOUR_STOP = config["HOUR_STOP"]
REGEX_CHUNK_SIZE = config["REGEX_CHUNK_SIZE"]
# Create session
session = requests.Session()
@ -98,6 +99,11 @@ while not urls.empty():
log.info("too large response")
continue
# Check file type
if ("Content-Type" in r.headers.keys() and not r.headers["Content-Type"].startswith("text/")) or ("content-type" in r.headers.keys() and not r.headers["content-type"].startswith("text/")):
log.info("response not text")
continue
# Download full
r = session.get(url, timeout=5)
@ -110,9 +116,11 @@ while not urls.empty():
# Filter page for hrefs
hrefs = []
try:
hrefs = [res[0] for res in re.findall("(https*:\/\/([a-z0-9]+\.)*[a-z0-9]{3,}\.[a-z0-9]{2,}\/)", r.text)]
pages = [(url[:(url.rfind("/")+1 if res[0][0] != "/" else url.find("/", 10))]+res[0]) for res in re.findall("href *= *[\"'](\/*([a-z0-9]*\/*)+(\.[a-z0-9]*)*)[\"']", r.text)]
hrefs.extend(pages)
for chunkIndex in range(0, len(r.text), REGEX_CHUNK_SIZE):
log.debug("regex on chunk %d"%chunkIndex)
chunk = r.text[chunkIndex*REGEX_CHUNK_SIZE:min((chunkIndex+1)*REGEX_CHUNK_SIZE, len(r.text))]
hrefs.extend([(url[:(url.rfind("/")+1 if res[0][0] != "/" else url.find("/", 10))]+res[0]) for res in re.findall("href ?= ?[\"'](\/?([a-z0-9]*\/?)+(\.[a-z0-9]*)?)[\"']", chunk)])
hrefs.extend([res[0] for res in re.findall("(https?:\/\/([a-z0-9]+\.)*[a-z0-9]{3,}\.[a-z0-9]{2,}\/)", chunk)])
except Exception as e:
log.info("failed to parse page")
log.info(e)