diff options
Diffstat (limited to 'backfill/backfill_hbase_from_cdx.py')
| -rwxr-xr-x | backfill/backfill_hbase_from_cdx.py | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/backfill/backfill_hbase_from_cdx.py b/backfill/backfill_hbase_from_cdx.py new file mode 100755 index 0000000..757794a --- /dev/null +++ b/backfill/backfill_hbase_from_cdx.py @@ -0,0 +1,169 @@ +#!/usr/bin/env python3 +""" +Streaming Hadoop script to import CDX metadata into the HBase fulltext table, +primarily for URL-agnostic crawl de-duplication. Takes only "fulltext" file +formats. + +Requires: +- happybase + +TODO: +- argparse +- refactor into an object +- tests in separate file +- nose tests +- sentry integration for error reporting +""" + +import sys +import json +import happybase + +NORMAL_MIME = ( + 'application/pdf', + 'application/postscript', + 'text/html', + 'text/xml', + #'application/xml', +) + +def normalize_mime(raw): + raw = raw.lower() + for norm in NORMAL_MIME: + if raw.startswith(norm): + return norm + + # Special cases + if raw.startswith('application/xml'): + return 'text/xml' + if raw.startswith('application/x-pdf'): + return 'application/pdf' + return None + +def test_normalize_mime(): + assert normalize_mime("asdf") == None + assert normalize_mime("application/pdf") == "application/pdf" + assert normalize_mime("application/pdf+journal") == "application/pdf" + assert normalize_mime("Application/PDF") == "application/pdf" + assert normalize_mime("application/p") == None + assert normalize_mime("application/xml+stuff") == "text/xml" + +def transform_line(raw_cdx): + + cdx = raw_cdx.split() + if len(cdx) < 11: + return None + + surt = cdx[0] + dt = cdx[1] + url = cdx[2] + mime = normalize_mime(cdx[3]) + http_status = cdx[4] + if http_status != "200": + return None + key = cdx[5] + c_size = cdx[8] + offset = cdx[9] + warc = cdx[10] + info = dict(surt=surt, dt=dt, url=url, c_size=c_size, offset=offset, + warc=warc) + return {'key': key, 'file:mime': mime, 'file:cdx': info} + +def test_transform_line(): + + raw = "edu,upenn,ldc)/sites/www.ldc.upenn.edu/files/medar2009-large-arabic-broadcast-collection.pdf 20170828233154 https://www.ldc.upenn.edu/sites/www.ldc.upenn.edu/files/medar2009-large-arabic-broadcast-collection.pdf application/pdf 200 WL3FEA62TEU4F52Y5DOVQ62VET4QJW7G - - 210251 931661233 SEMSCHOLAR-PDF-CRAWL-2017-08-04-20170828231135742-00000-00009-wbgrp-svc284/SEMSCHOLAR-PDF-CRAWL-2017-08-04-20170828232253025-00005-3480~wbgrp-svc284.us.archive.org~8443.warc.gz" + correct = { + 'key': "WL3FEA62TEU4F52Y5DOVQ62VET4QJW7G", + 'file:mime': "application/pdf", + 'file:cdx': { + 'surt': "edu,upenn,ldc)/sites/www.ldc.upenn.edu/files/medar2009-large-arabic-broadcast-collection.pdf", + 'url': "https://www.ldc.upenn.edu/sites/www.ldc.upenn.edu/files/medar2009-large-arabic-broadcast-collection.pdf", + 'dt': "20170828233154", + 'warc': "SEMSCHOLAR-PDF-CRAWL-2017-08-04-20170828231135742-00000-00009-wbgrp-svc284/SEMSCHOLAR-PDF-CRAWL-2017-08-04-20170828232253025-00005-3480~wbgrp-svc284.us.archive.org~8443.warc.gz", + 'offset': "931661233", + 'c_size': "210251", + } + } + + assert transform_line(raw) == correct + assert transform_line(raw + "\n") == correct + assert transform_line(raw + " extra_field") == correct + + +def run(in_lines, out_lines, status_lines, table, mime_filter=None): + + if mime_filter is None: + mime_filter = ['application/pdf'] + count_skip = count_invalid = count_fail = count_success = 0 + + for raw_cdx in in_lines.readlines(): + if (raw_cdx.startswith(' ') or raw_cdx.startswith('filedesc') or + raw_cdx.startswith('#')): + # Skip line + count_skip += 1 + continue + + info = transform_line(raw_cdx) + if info is None: + count_invalid += 1 + continue + if info['file:mime'] not in mime_filter: + count_skip += 1 + continue + + key = info.pop('key') + info['file:cdx'] = json.dumps(info['file:cdx'], sort_keys=True, + indent=None) + try: + table.put(key, info) + count_success += 1 + except: + status_lines.write("ERROR\n") # TODO: + count_fail += 1 + + status_lines.write('\n') + status_lines.write('skip\t{}\n'.format(count_skip)) + status_lines.write('invalid\t{}\n'.format(count_invalid)) + status_lines.write('fail\t{}\n'.format(count_fail)) + status_lines.write('success\t{}\n'.format(count_success)) + + +def test_run(): + + import io + import happybase_mock + + out = io.StringIO() + status = io.StringIO() + raw = io.StringIO(""" +com,sagepub,cep)/content/28/9/960.full.pdf 20170705062200 http://cep.sagepub.com/content/28/9/960.full.pdf application/pdf 301 3I42H3S6NNFQ2MSVX7XZKYAYSCX5QBYJ - - 401 313356621 CITESEERX-CRAWL-2017-06-20-20170705061647307-00039-00048-wbgrp-svc284/CITESEERX-CRAWL-2017-06-20-20170705062052659-00043-31209~wbgrp-svc284.us.archive.org~8443.warc.gz +eu,eui,cadmus)/bitstream/handle/1814/36635/rscas_2015_03.pdf;jsessionid=761393014319a39f40d32ae3eb3a853f?sequence=1 20170705062202 http://cadmus.eui.eu/bitstream/handle/1814/36635/RSCAS_2015_03.pdf%3Bjsessionid%3D761393014319A39F40D32AE3EB3A853F?sequence%3D1 application/PDF 200 MPCXVWMUTRUGFP36SLPHKDLY6NGU4S3J - - 854156 328850624 CITESEERX-CRAWL-2017-06-20-20170705061647307-00039-00048-wbgrp-svc284/CITESEERX-CRAWL-2017-06-20-20170705062052659-00043-31209~wbgrp-svc284.us.archive.org~8443.warc.gz +com,pbworks,educ333b)/robots.txt 20170705063311 http://educ333b.pbworks.com/robots.txt text/plain 200 6VAUYENMOU2SK2OWNRPDD6WTQTECGZAD - - 638 398190140 CITESEERX-CRAWL-2017-06-20-20170705062707827-00049-00058-wbgrp-svc284/CITESEERX-CRAWL-2017-06-20-20170705063158203-00053-31209~wbgrp-svc284.us.archive.org~8443.warc.gz +""") + + conn = happybase_mock.Connection() + conn.create_table('wbgrp-journal-extract-test', {'file': {}, 'grobid0': {}}) + + table = conn.table('wbgrp-journal-extract-test') + run(raw, out, status, table) + + print(status.getvalue()) + + assert table.row(b'1') == {} + # HTTP 301 + assert table.row(b'3I42H3S6NNFQ2MSVX7XZKYAYSCX5QBYJ') == {} + # valid + assert table.row(b'MPCXVWMUTRUGFP36SLPHKDLY6NGU4S3J') != {} + # text/plain + assert table.row(b'6VAUYENMOU2SK2OWNRPDD6WTQTECGZAD') == {} + + row = table.row(b'MPCXVWMUTRUGFP36SLPHKDLY6NGU4S3J') + assert row[b'file:mime'] == b"application/pdf" + json.loads(row[b'file:cdx'].decode('utf-8')) + +if __name__=="__main__": + hb = happybase.Connection(host='') + with hb.connection() as conn: + table = conn.table('wbgrp-journal-extract-0-qa') + run(sys.stdin, sys.stdout, sys.stderr, table) + |