diff options
Diffstat (limited to 'python')
| -rwxr-xr-x | python/deliver_gwb_to_disk.py | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/python/deliver_gwb_to_disk.py b/python/deliver_gwb_to_disk.py new file mode 100755 index 0000000..3dcf962 --- /dev/null +++ b/python/deliver_gwb_to_disk.py @@ -0,0 +1,166 @@ +#!/usr/bin/env python3 +""" +Tool for bulk copying of PDFs (or other files) from GWB to local disk. +""" + +# XXX: some broken MRO thing going on in here due to python3 object wrangling +# in `wayback` library. Means we can't run pylint. +# pylint: skip-file + +import os +import sys +import json +import base64 +import hashlib +import argparse +from collections import Counter + +import raven +import wayback.exception +from http.client import IncompleteRead +from wayback.resourcestore import ResourceStore +from gwb.loader import CDXLoaderFactory + +# Yep, a global. Gets DSN from `SENTRY_DSN` environment variable +sentry_client = raven.Client() + + +class DeliverGwbDisk: + + def __init__(self, disk_dir, **kwargs): + self.warc_uri_prefix = kwargs.get('warc_uri_prefix') + self.rstore = None + self.count = Counter() + # /serve/ instead of /download/ doesn't record view count + self.petabox_base_url = kwargs.get('petabox_base_url', 'http://archive.org/serve/') + # gwb library will fall back to reading from /opt/.petabox/webdata.secret + self.petabox_webdata_secret = kwargs.get('petabox_webdata_secret', os.environ.get('PETABOX_WEBDATA_SECRET')) + self.disk_dir = disk_dir + self.disk_prefix = kwargs.get('disk_prefix', 'pdf/') + self.disk_suffix = kwargs.get('disk_suffix', '.pdf') + + def fetch_warc_content(self, warc_path, offset, c_size): + warc_uri = self.warc_uri_prefix + warc_path + if not self.rstore: + self.rstore = ResourceStore(loaderfactory=CDXLoaderFactory( + webdata_secret=self.petabox_webdata_secret, + download_base_url=self.petabox_base_url)) + try: + gwb_record = self.rstore.load_resource(warc_uri, offset, c_size) + except wayback.exception.ResourceUnavailable: + return None, dict(status="error", + reason="failed to load file contents from wayback/petabox (ResourceUnavailable)") + except ValueError as ve: + return None, dict(status="error", + reason="failed to load file contents from wayback/petabox (ValueError: {})".format(ve)) + except EOFError as eofe: + return None, dict(status="error", + reason="failed to load file contents from wayback/petabox (EOFError: {})".format(eofe)) + except TypeError as te: + return None, dict(status="error", + reason="failed to load file contents from wayback/petabox (TypeError: {}; likely a bug in wayback python code)".format(te)) + # Note: could consider a generic "except Exception" here, as we get so + # many petabox errors. Do want jobs to fail loud and clear when the + # whole cluster is down though. + + if gwb_record.get_status()[0] != 200: + return None, dict(status="error", + reason="archived HTTP response (WARC) was not 200", + warc_status=gwb_record.get_status()[0]) + + try: + raw_content = gwb_record.open_raw_content().read() + except IncompleteRead as ire: + return None, dict(status="error", + reason="failed to read actual file contents from wayback/petabox (IncompleteRead: {})".format(ire)) + return raw_content, None + + def run(self, manifest_file): + sys.stderr.write("Ensuring all 65536 base directories exist...\n") + for i in range(256): + for j in range(256): + fpath = "{}/{}{:02x}/{:02x}".format( + self.disk_dir, + self.disk_prefix, + i, + j) + os.makedirs(fpath, exist_ok=True) + sys.stderr.write("Starting...\n") + for line in manifest_file: + self.count['total'] += 1 + line = line.strip().split('\t') + if len(line) != 2: + self.count['skip-line'] += 1 + continue + sha1_hex, cdx_json = line[0], line[1] + assert len(sha1_hex) == 40 + file_cdx = json.loads(cdx_json) + # If warc is not item/file.(w)arc.gz form, skip it + if len(file_cdx['warc'].split('/')) != 2: + sys.stderr.write('WARC path not petabox item/file: {}'.format(file_cdx['warc'])) + print("{}\tskip warc\t{}".format(sha1_hex, file_cdx['warc'])) + self.count['skip-warc'] += 1 + continue + # fetch from GWB/petabox via HTTP range-request + blob, status = self.fetch_warc_content(file_cdx['warc'], file_cdx['offset'], file_cdx['c_size']) + if blob is None and status: + print("{}\terror petabox\t{}\t{}".format(sha1_hex, file_cdx['warc'], status['reason'])) + self.count['err-petabox-fetch'] += 1 + continue + elif not blob: + print("{}\tskip-empty-blob".format(sha1_hex)) + self.count['skip-empty-blob'] += 1 + continue + # verify sha1 + if sha1_hex != hashlib.sha1(blob).hexdigest(): + #assert sha1_hex == hashlib.sha1(blob).hexdigest() + #sys.stderr.write("{}\terror petabox-mismatch\n".format(sha1_hex)) + print("{}\terror petabox-hash-mismatch".format(sha1_hex)) + self.count['err-petabox-hash-mismatch'] += 1 + + self.count['petabox-ok'] += 1 + # save to disk + fpath = "{}/{}{}/{}/{}{}".format( + self.disk_dir, + self.disk_prefix, + sha1_hex[0:2], + sha1_hex[2:4], + sha1_hex, + self.disk_suffix) + with open(fpath, 'wb') as f: + f.write(blob) + print("{}\tsuccess\t{}\t{}".format(sha1_hex, fpath, len(blob))) + self.count['success-disk'] += 1 + sys.stderr.write("{}\n".format(self.count)) + +@sentry_client.capture_exceptions +def main(): + + parser = argparse.ArgumentParser() + parser.add_argument('--disk-dir', + required=True, + type=str, + help='local base directory to save into') + parser.add_argument('--disk-prefix', + type=str, + default="pdf/", + help='directory prefix for items created in bucket') + parser.add_argument('--disk-suffix', + type=str, + default=".pdf", + help='file suffix for created files') + parser.add_argument('--warc-uri-prefix', + type=str, + default='https://archive.org/serve/', + help='URI where WARCs can be found') + parser.add_argument('manifest_file', + help="TSV/JSON manifest file", + default=sys.stdin, + type=argparse.FileType('r')) + args = parser.parse_args() + + worker = DeliverGwbDisk(**args.__dict__) + worker.run(args.manifest_file) + +if __name__ == '__main__': # pragma: no cover + main() |