#!/usr/bin/env python3
"""
Variant of extraction_cdx_grobid which takes a partial metadata list as input
instead of CDX.
This task list is dumped by another Hadoop job which scans over the HBase table
quickly, which allows this job to skip a (relatively) expensive HBase read
per-row.
Requires:
- happybase
- mrjob
- wayback/GWB libraries
"""
# 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 xml
import json
import raven
import struct
import requests
import happybase
import mrjob
from mrjob.job import MRJob
import wayback.exception
from wayback.resource import Resource
from wayback.resource import ArcResource
from wayback.resourcestore import ResourceStore
from gwb.loader import CDXLoaderFactory
from common import parse_ungrobided_line
from grobid2json import teixml2json
# Yep, a global. Gets DSN from `SENTRY_DSN` environment variable
sentry_client = raven.Client()
# Specific poison-pill rows we should skip
KEY_DENYLIST = (
'sha1:DLCCSMMVTCCIR6LRXHEQLZ4PWO6NG2YT', # "failed to guess ARC header format"
)
class MRExtractUnGrobided(MRJob):
# "ungrobided" TSV lines in; JSON status out
#HADOOP_INPUT_FORMAT = 'org.apache.hadoop.mapred.lib.NLineInputFormat'
#INPUT_PROTOCOL = mrjob.protocol.RawProtocol
INPUT_PROTOCOL = mrjob.protocol.RawValueProtocol
OUTPUT_PROTOCOL = mrjob.protocol.JSONValueProtocol
def configure_args(self):
super(MRExtractUnGrobided, 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')
self.add_passthru_arg('--grobid-uri',
type=str,
default='http://localhost:8070',
help='URI of GROBID API Server')
self.add_passthru_arg('--warc-uri-prefix',
type=str,
default='https://archive.org/serve/',
help='URI where WARCs can be found')
def __init__(self, *args, **kwargs):
super(MRExtractUnGrobided, self).__init__(*args, **kwargs)
self.mime_filter = ['application/pdf']
self.hb_table = None
def grobid_process_fulltext(self, content):
r = requests.post(self.options.grobid_uri + "/api/processFulltextDocument",
files={'input': content})
return r
def mapper_init(self):
if self.hb_table:
return
sentry_client.tags_context(dict(hbase_table=self.options.hbase_table))
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:
raise Exception("Couldn't connect to HBase using host: {}".format(host))
self.hb_table = hb_conn.table(self.options.hbase_table)
def parse_ungrobided_line(self, raw_line):
"""Line should be TSV and have non-null fields:
- key (string)
- f:c (string, json)
- file:mime (string)
- file:cdx (string, json)
"""
if (raw_line.startswith(' ') or raw_line.startswith('#')):
return None, dict(status="invalid", reason="line prefix", input=raw_line)
info = parse_ungrobided_line(raw_line)
if info is None:
return None, dict(status="invalid", reason="ungrobided parse")
if info['file:mime'] not in self.mime_filter:
return None, dict(status="skip", reason="mimetype", mimetype=info['file:mime'])
# If warc is not item/file.(w)arc.gz form, skip it
if len(info['file:cdx']['warc'].split('/')) != 2:
return None, dict(status="skip", reason="WARC path not petabox item/file", path=info['file:cdx']['warc'])
return info, None
def fetch_warc_content(self, warc_path, offset, c_size):
warc_uri = self.options.warc_uri_prefix + warc_path
try:
rstore = ResourceStore(loaderfactory=CDXLoaderFactory())
gwb_record = 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")
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])
return gwb_record.open_raw_content().read(), None
def extract(self, info):
# Fetch data from WARCs in petabox
original_content, status = self.fetch_warc_content(
info['file:cdx']['warc'],
info['file:cdx']['offset'],
info['file:cdx']['c_size'])
if status:
return None, status
info['file:size'] = len(original_content)
# Submit to GROBID
try:
grobid_response = self.grobid_process_fulltext(original_content)
except requests.exceptions.ConnectionError:
return None, dict(status="error", reason="connection to GROBID worker")
info['grobid0:status_code'] = grobid_response.status_code
# 4 MByte XML size limit; don't record GROBID status on this path
if len(grobid_response.content) > 4000000:
info['grobid0:status'] = {'status': 'oversize'}
return info, dict(status="oversize", reason="TEI response was too large")
if grobid_response.status_code != 200:
# response.text is .content decoded as utf-8
info['grobid0:status'] = dict(status='error', description=grobid_response.text)
return info, dict(status="error", reason="non-200 GROBID HTTP status",
extra=grobid_response.text)
info['grobid0:status'] = {'status': 'partial'}
info['grobid0:tei_xml'] = grobid_response.content
# Convert TEI XML to JSON
try:
info['grobid0:tei_json'] = teixml2json(info['grobid0:tei_xml'], encumbered=True)
except xml.etree.ElementTree.ParseError:
info['grobid0:status'] = dict(status="fail", reason="GROBID 200 XML parse error")
return info, info['grobid0:status']
except ValueError:
info['grobid0:status'] = dict(status="fail", reason="GROBID 200 XML non-TEI content")
return info, info['grobid0:status']
tei_metadata = info['grobid0:tei_json'].copy()
for k in ('body', 'annex'):
# Remove fulltext (copywritted) content
tei_metadata.pop(k, None)
info['grobid0:metadata'] = tei_metadata
# Determine extraction "quality"
# TODO:
info['grobid0:quality'] = None
info['grobid0:status'] = {'status': 'success'}
return info, None
@sentry_client.capture_exceptions
def mapper(self, _, raw_line):
"""
1. parse filtered line
2. fetch data from wayback
3. submit to GROBID
4. convert GROBID response to JSON (and metadata)
6. determine "quality"
6. push results to hbase
"""
self.increment_counter('lines', 'total')
# Parse line and filter down
info, status = self.parse_ungrobided_line(raw_line)
if info is None:
self.increment_counter('lines', status['status'])
yield _, status
return
key = info['key']
if key in KEY_DENYLIST:
self.increment_counter('lines', 'denylist')
yield _, dict(status='denylist', key=key)
return
# Note: this may not get "cleared" correctly
sentry_client.extra_context(dict(row_key=key))
# Do the extraction
info, status = self.extract(info)
if info is None:
self.increment_counter('lines', status['status'])
status['key'] = key
yield _, status
return
extraction_status = status
# Decide what to bother inserting back into HBase
# Basically, don't overwrite backfill fields.
grobid_status_code = info.get('grobid0:status_code', None)
for k in list(info.keys()):
if k.encode('utf-8') in ('f:c', 'file:mime', 'file:cdx'):
info.pop(k)
# Convert fields to binary
for k in list(info.keys()):
if info[k] is None:
info.pop(k)
# NOTE: we're not actually sending these f:*, file:* keys...
elif k in ('f:c', 'file:cdx', 'grobid0:status', 'grobid0:tei_json',
'grobid0:metadata'):
assert type(info[k]) == dict
info[k] = json.dumps(info[k], sort_keys=True, indent=None)
elif k in ('file:size', 'grobid0:status_code'):
# encode as int64 in network byte order
if info[k] != {} and info[k] != None:
info[k] = struct.pack('!q', info[k])
key = info.pop('key')
self.hb_table.put(key, info)
self.increment_counter('lines', 'success')
if extraction_status is not None:
yield _, dict(status="partial", key=key,
grobid_status_code=grobid_status_code,
reason=extraction_status['reason'])
else:
yield _, dict(status="success",
grobid_status_code=grobid_status_code, key=key,
extra=extraction_status)
if __name__ == '__main__': # pragma: no cover
MRExtractUnGrobided.run()