1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
#!/usr/bin/env python3
import sys
import json
import base64
from typing import Optional, List
import requests
from requests.adapters import HTTPAdapter
from requests.packages.urllib3.util.retry import Retry # pylint: disable=import-error
def requests_retry_session(
retries: int = 10,
backoff_factor: int = 3,
status_forcelist: List[int] = [500, 502, 504],
session: requests.Session = None,
) -> requests.Session:
"""
From: https://www.peterbe.com/plog/best-practice-with-retries-with-requests
"""
session = session or requests.Session()
retry = Retry(
total=retries,
read=retries,
connect=retries,
backoff_factor=backoff_factor,
status_forcelist=status_forcelist,
)
adapter = HTTPAdapter(max_retries=retry)
session.mount("http://", adapter)
session.mount("https://", adapter)
return session
def b32_hex(s: str) -> str:
"""
Converts a base32-encoded SHA-1 checksum into hex-encoded
base32 checksums are used by, eg, heritrix and in wayback CDX files
"""
s = s.strip().split()[0].lower()
if s.startswith("sha1:"):
s = s[5:]
if len(s) != 32:
if len(s) == 40:
return s
raise ValueError("not a base-32 encoded SHA-1 hash: {}".format(s))
return base64.b16encode(base64.b32decode(s.upper())).lower().decode("utf-8")
SANDCRAWLER_POSTGREST_URL = "http://wbgrp-svc506.us.archive.org:3030"
def get_db_cdx(url: str, http_session) -> List[dict]:
resp = http_session.get(SANDCRAWLER_POSTGREST_URL + "/cdx", params=dict(url="eq." + url))
resp.raise_for_status()
rows = resp.json()
return rows or []
CDX_API_URL = "https://web.archive.org/cdx/search/cdx"
def get_api_cdx(url: str, partial_dt: str, http_session) -> Optional[dict]:
params = {
"url": url,
"from": partial_dt,
"to": partial_dt,
"matchType": "exact",
"output": "json",
"limit": 20,
# can't filter status because might be warc/revisit
#"filter": "statuscode:200",
}
resp = http_session.get(CDX_API_URL, params=params)
resp.raise_for_status()
rows = resp.json()
if not rows:
return None
#print(rows, file=sys.stderr)
if len(rows) < 2:
return None
for raw in rows[1:]:
record = dict(
surt=raw[0],
datetime=raw[1],
url=raw[2],
mimetype=raw[3],
status_code=raw[4],
sha1b32=raw[5],
sha1hex=b32_hex(raw[5]),
)
if record['url'] != url:
# TODO: could allow HTTP/HTTPS fuzzy match
print("CDX API near match: URL", file=sys.stderr)
continue
if not record['datetime'].startswith(partial_dt):
print(f"CDX API near match: datetime {partial_dt} {record['datetime']}", file=sys.stderr)
continue
if record['status_code'] == "200" or (record['status_code'] == '-' and record['mimetype'] == 'warc/revisit'):
return record
else:
print(f"CDX API near match: status {record['status_code']}", file=sys.stderr)
return None
def process_file(fe, session) -> dict:
short_urls = []
self_urls = dict()
full_urls = dict()
status = "unknown"
for pair in fe['urls']:
u = pair['url']
if not '://web.archive.org/web/' in u:
continue
seg = u.split('/')
assert seg[2] == "web.archive.org"
assert seg[3] == "web"
if not seg[4].isdigit():
continue
original_url = "/".join(seg[5:])
if len(seg[4]) == 12 or len(seg[4]) == 4:
short_urls.append(u)
elif len(seg[4]) == 14:
self_urls[original_url] = u
else:
print(f"other bogus ts: {seg[4]}", file=sys.stderr)
return dict(file_entity=fe, full_urls=full_urls, status="fail-bogus-ts")
if len(short_urls) == 0:
return dict(file_entity=fe, full_urls=[], status="skip-no-shorts")
for short in list(set(short_urls)):
seg = short.split('/')
ts = seg[4]
assert len(ts) in [12,4] and ts.isdigit()
original_url = '/'.join(seg[5:])
if short in full_urls:
continue
if original_url in self_urls and ts in self_urls[original_url]:
full_urls[short] = self_urls[original_url]
status = "success-self"
continue
cdx_row_list = get_db_cdx(original_url, http_session=session)
for cdx_row in cdx_row_list:
if cdx_row['sha1hex'] == fe['sha1'] and cdx_row['url'] == original_url and cdx_row['datetime'].startswith(ts):
assert len(cdx_row['datetime']) == 14 and cdx_row['datetime'].isdigit()
full_urls[short] = f"https://web.archive.org/web/{cdx_row['datetime']}/{original_url}"
status = "success-db"
break
else:
#print(f"cdx DB found, but no match", file=sys.stderr)
pass
cdx_row = None
if short in full_urls:
continue
cdx_record = None
try:
cdx_record = get_api_cdx(original_url, partial_dt=ts, http_session=session)
except requests.exceptions.HTTPError as e:
if e.response.status_code == 403:
return dict(file_entity=fe, full_urls=full_urls, status="fail-cdx-403")
else:
raise
if cdx_record:
if cdx_record['sha1hex'] == fe['sha1'] and cdx_record['url'] == original_url and cdx_record['datetime'].startswith(ts):
assert len(cdx_record['datetime']) == 14 and cdx_record['datetime'].isdigit()
full_urls[short] = f"https://web.archive.org/web/{cdx_record['datetime']}/{original_url}"
status = "success-api"
continue
else:
print(f"cdx API found, but no match", file=sys.stderr)
else:
print(f"no CDX API record found: {original_url}", file=sys.stderr)
if short not in full_urls:
return dict(file_entity=fe, full_urls=full_urls, status="fail-not-found")
return dict(
file_entity=fe,
full_urls=full_urls,
status=status,
)
def main():
session = requests_retry_session()
session.headers.update({
"User-Agent": "Mozilla/5.0 fatcat.CdxFixupBot",
})
for line in sys.stdin:
if not line.strip():
continue
fe = json.loads(line)
print(json.dumps(process_file(fe, session=session)))
if __name__=="__main__":
main()
|
