extraction -> mapreduce

1 files changed, 0 insertions, 195 deletions

diff --git a/extraction/backfill_hbase_from_cdx.py b/extraction/backfill_hbase_from_cdx.py
deleted file mode 100755
index fe37bd5..0000000
--- a/extraction/backfill_hbase_from_cdx.py
+++ /dev/null
@@ -1,195 +0,0 @@
-#!/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
-- mrjob
-
-TODO:
-- argparse
-- refactor into an object
-- tests in separate file
-- nose tests
-- sentry integration for error reporting
-"""
-
-import sys
-import json
-from datetime import datetime
-import happybase
-import mrjob
-from mrjob.job import MRJob
-
-NORMAL_MIME = (
-    'application/pdf',
-    'application/postscript',
-    'text/html',
-    'text/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]
-    key = cdx[5]
-    c_size = cdx[8]
-    offset = cdx[9]
-    warc = cdx[10]
-
-    if not (key.isalnum() and c_size.isdigit() and offset.isdigit()
-            and http_status == "200" and len(key) == 32 and dt.isdigit()):
-        return None
-
-    if '-' in (surt, dt, url, mime, http_status, key, c_size, offset, warc):
-        return None
-
-    key = "sha1:{}".format(key)
-
-    info = dict(surt=surt, dt=dt, url=url, c_size=int(c_size),
-        offset=int(offset), warc=warc)
-
-    warc_file = warc.split('/')[-1]
-    dt_iso = datetime.strptime(dt, "%Y%m%d%H%M%S").isoformat()
-    try:
-        dt_iso = datetime.strptime(dt, "%Y%m%d%H%M%S").isoformat()
-    except:
-        return None
-
-    # 'i' intentionally not set
-    heritrix = dict(u=url, d=dt_iso, f=warc_file, o=int(offset), c=1)
-    return {'key': key, 'file:mime': mime, 'file:cdx': info, 'f:c': heritrix}
-
-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': "sha1: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,
-        },
-        'f:c': {
-            'u': "https://www.ldc.upenn.edu/sites/www.ldc.upenn.edu/files/medar2009-large-arabic-broadcast-collection.pdf",
-            'd': "2017-08-28T23:31:54",
-            'f': "SEMSCHOLAR-PDF-CRAWL-2017-08-04-20170828232253025-00005-3480~wbgrp-svc284.us.archive.org~8443.warc.gz",
-            'o': 931661233,
-            'c': 1,
-        }
-    }
-
-    assert transform_line(raw) == correct
-    assert transform_line(raw + "\n") == correct
-    assert transform_line(raw + " extra_field") == correct
-
-
-class MRCDXBackfillHBase(MRJob):
-
-    # CDX lines in; JSON status out
-    INPUT_PROTOCOL = mrjob.protocol.RawValueProtocol
-    OUTPUT_PROTOCOL = mrjob.protocol.JSONValueProtocol
-
-    def configure_args(self):
-        super(MRCDXBackfillHBase, self).configure_args()
-
-        self.add_passthru_arg('--hbase-table',
-                              type=str,
-                              default='wbgrp-journal-extract-0-qa',
-                              help='HBase table to backfill into (must exist)')
-        self.add_passthru_arg('--hbase-host',
-                              type=str,
-                              default='localhost',
-                              help='HBase thrift API host to connect to')
-
-    def __init__(self, *args, **kwargs):
-
-        # Allow passthrough for tests
-        if 'hb_table' in kwargs:
-            self.hb_table = kwargs.pop('hb_table')
-        else:
-            self.hb_table = None
-
-        super(MRCDXBackfillHBase, self).__init__(*args, **kwargs)
-        self.mime_filter = ['application/pdf']
-
-    def mapper_init(self):
-
-        if self.hb_table is None:
-            try:
-                host = self.options.hbase_host
-                # TODO: make these configs accessible from... mrconf.cfg?
-                hb_conn = happybase.Connection(host=host, transport="framed",
-                    protocol="compact")
-            except Exception as err:
-                raise Exception("Couldn't connect to HBase using host: {}".format(host))
-            self.hb_table = hb_conn.table(self.options.hbase_table)
-
-    def mapper(self, _, raw_cdx):
-
-        self.increment_counter('lines', 'total')
-
-        if (raw_cdx.startswith(' ') or raw_cdx.startswith('filedesc') or
-                raw_cdx.startswith('#')):
-
-            # Skip line
-            # XXX: tests don't cover this path; need coverage!
-            self.increment_counter('lines', 'invalid')
-            return _, dict(status="invalid")
-
-        info = transform_line(raw_cdx)
-        if info is None:
-            self.increment_counter('lines', 'invalid')
-            return _, dict(status="invalid")
-
-        if info['file:mime'] not in self.mime_filter:
-            self.increment_counter('lines', 'skip')
-            return _, dict(status="skip")
-
-        key = info.pop('key')
-        info['f:c'] = json.dumps(info['f:c'], sort_keys=True, indent=None)
-        info['file:cdx'] = json.dumps(info['file:cdx'], sort_keys=True,
-            indent=None)
-
-        self.hb_table.put(key, info)
-        self.increment_counter('lines', 'success')
-
-        yield _, dict(status="success")
-
-if __name__ == '__main__':
-    MRCDXBackfillHBase.run()
-