def _save_hashtbl(tbl_name, data, dbi=None):
"""
將 data 存入列表，接受 body, [body...] 或 [{'body':'body'}...] 的格式
數量可能很大，因此硬寫不快取
"""
from MySQLdb import escape_string
from lib.util.text import md5
if (type(data) is str):
_data = {'md5': md5(data), 'body': data}
elif (type(data) is dict):
if 'md5' not in data:
data['md5'] = md5(data['body'])
_data = data
elif (type(data[0]) is str):
_data = [{'md5': md5(x), 'body': x} for x in data]
else:
_data = [{
'md5': x['md5'] if 'md5' in x else md5(x['body']),
'body': x['body']
} for x in data]
sql = "INSERT IGNORE INTO `%s` (`body`, `hash`) VALUES " % escape_string(
tbl_name)
sql += "(%(body)s, UNHEX(%(md5)s))"
DB.execute(sql, _data, dbi=dbi)
def save_article(payload, dbi = None):
"""更新新聞內容"""
from json import dumps
from datetime import datetime
from copy import deepcopy
from lib.util.text import md5
# deep copy so that we don't mess up the original payload
_payload = deepcopy(payload)
_payload["meta"] = dumps(payload['meta'])
_payload["pub_ts"] = datetime.fromtimestamp(payload["pub_ts"]).isoformat()
# hashtbl : html, text, meta
_payload['html_md5'] = md5(_payload['html'])
_payload['text_md5'] = md5(_payload['text'])
_payload['meta_md5'] = md5(_payload['meta'])
_payload['src_md5'] = md5(_payload['src'])
_save_hashtbl('article__htmls', {
'md5': _payload['html_md5'], 'body':_payload['html']}, dbi = dbi)
_save_hashtbl('article__texts', {
'md5': _payload['text_md5'], 'body':_payload['text']}, dbi = dbi)
_save_hashtbl('article__meta', {
'md5': _payload['meta_md5'], 'body': _payload['meta']}, dbi = dbi)
_save_hashtbl('article__srcs', {
'md5': _payload['src_md5'], 'body': _payload['src']}, dbi = dbi)
# hashtbl: url
_payload['url_md5'] = md5(_payload['url'])
_payload['url_read_md5'] = md5(_payload['url_read'])
_payload['url_canonical_md5'] = md5(_payload['url_canonical'])
_save_hashtbl('article__urls', [
{'md5': _payload['url_md5'], 'body': _payload['url']},
{'md5': _payload['url_read_md5'], 'body': _payload['url_read']},
{'md5': _payload['url_canonical_md5'], 'body': _payload['url_canonical']},
], dbi = dbi);
# do the insert
sql = "INSERT INTO `articles` (" \
"`title`, `pub_ts`, `created_on`, " \
"`feed_id`, `ctlr_id`, " \
"`url_hash`, `url_read_hash`, `url_canonical_hash`, " \
"`meta_hash`, `html_hash`, `text_hash`, `src_hash`" \
") VALUES(" \
"%(title)s, %(pub_ts)s, CURRENT_TIMESTAMP, " \
"(SELECT `feed_id` FROM `feeds` WHERE `url` = %(feed_url)s), " \
"(SELECT `ctlr_id` FROM `ctlrs` WHERE `classname` = %(ctlr_classname)s), " \
"UNHEX(%(url_md5)s), UNHEX(%(url_read_md5)s), UNHEX(%(url_canonical_md5)s)," \
"UNHEX(%(meta_md5)s), UNHEX(%(html_md5)s), UNHEX(%(text_md5)s), UNHEX(%(src_md5)s)" \
") ON DUPLICATE KEY UPDATE last_seen_on = CURRENT_TIMESTAMP"
DB.execute(sql, _payload, dbi = dbi)
def _save_hashtbl(tbl_name, data, dbi = None):
"""
將 data 存入列表，接受 body, [body...] 或 [{'body':'body'}...] 的格式
數量可能很大，因此硬寫不快取
"""
from MySQLdb import escape_string
from lib.util.text import md5
if (type(data) is str):
_data = {'md5': md5(data), 'body': data}
elif (type(data) is dict):
if 'md5' not in data:
data['md5'] = md5(data['body'])
_data = data
elif (type(data[0]) is str):
_data = [{'md5': md5(x), 'body': x} for x in data]
else:
_data = [{'md5': x['md5'] if 'md5' in x else md5(x['body']), 'body': x['body']} for x in data]
sql = "INSERT IGNORE INTO `%s` (`body`, `hash`) VALUES " % escape_string(tbl_name)
sql += "(%(body)s, UNHEX(%(md5)s))"
DB.execute(sql, _data, dbi = dbi)
def save_response(payload, dbi = None):
""" Response, 僅在 parse 失敗時寫入，因此積極重寫"""
from json import dumps
from datetime import datetime
from copy import deepcopy
from lib.util.text import md5
# deep copy so that we don't mess up the original payload
_payload = deepcopy(payload)
_payload["meta"] = dumps(payload['meta'])
_payload["src_md5"] = md5(_payload['src'])
sql = "INSERT IGNORE INTO `responses` " + \
"(`feed_id`, `url`, `src`, `src_hash`, `meta`) VALUES(" + \
"(SELECT `feed_id` FROM `feeds` WHERE `url` = %(feed_url)s), " + \
"%(url)s, %(src)s, UNHEX(%(src_md5)s), %(meta)s" + \
")"
DB.execute(sql, _payload, dbi = dbi)
def save_response(payload, dbi=None):
""" Response, 僅在 parse 失敗時寫入，因此積極重寫"""
from json import dumps
from datetime import datetime
from copy import deepcopy
from lib.util.text import md5
# deep copy so that we don't mess up the original payload
_payload = deepcopy(payload)
_payload["meta"] = dumps(payload['meta'])
_payload["src_md5"] = md5(_payload['src'])
sql = "INSERT IGNORE INTO `responses` " + \
"(`feed_id`, `url`, `src`, `src_hash`, `meta`) VALUES(" + \
"(SELECT `feed_id` FROM `feeds` WHERE `url` = %(feed_url)s), " + \
"%(url)s, %(src)s, UNHEX(%(src_md5)s), %(meta)s" + \
")"
DB.execute(sql, _payload, dbi=dbi)
def get_fresh_urls(urls, dbi = None):
"""篩選出 urls 中未曾成功抓取過者並回傳"""
from lib.util.text import md5
from lib.util.net import normalize_url
if (len(urls) == 0): return set()
url_md5 = [{'url': x, 'md5': md5(normalize_url(x))} for x in urls]
hashes = "(" + (",".join(["UNHEX('%s')" % x['md5'] for x in url_md5 ])) + ")"
sql = "SELECT HEX(`hash`) FROM `article__urls` WHERE `hash` IN %s" % hashes
ret = set(DB.query(sql, dbi = dbi))
output = []
for x in url_md5:
if not (x['md5'].upper(),) in ret:
output.append(x['url'])
return output
def save_article(payload, dbi=None):
"""更新新聞內容"""
from json import dumps
from datetime import datetime
from copy import deepcopy
from lib.util.text import md5
# deep copy so that we don't mess up the original payload
_payload = deepcopy(payload)
_payload["meta"] = dumps(payload['meta'])
_payload["pub_ts"] = datetime.fromtimestamp(payload["pub_ts"]).isoformat()
# hashtbl : html, text, meta
_payload['html_md5'] = md5(_payload['html'])
_payload['text_md5'] = md5(_payload['text'])
_payload['meta_md5'] = md5(_payload['meta'])
_payload['src_md5'] = md5(_payload['src'])
_save_hashtbl('article__htmls', {
'md5': _payload['html_md5'],
'body': _payload['html']
},
dbi=dbi)
_save_hashtbl('article__texts', {
'md5': _payload['text_md5'],
'body': _payload['text']
},
dbi=dbi)
_save_hashtbl('article__meta', {
'md5': _payload['meta_md5'],
'body': _payload['meta']
},
dbi=dbi)
_save_hashtbl('article__srcs', {
'md5': _payload['src_md5'],
'body': _payload['src']
},
dbi=dbi)
# hashtbl: url
_payload['url_md5'] = md5(_payload['url'])
_payload['url_read_md5'] = md5(_payload['url_read'])
_payload['url_canonical_md5'] = md5(_payload['url_canonical'])
_save_hashtbl('article__urls', [
{
'md5': _payload['url_md5'],
'body': _payload['url']
},
{
'md5': _payload['url_read_md5'],
'body': _payload['url_read']
},
{
'md5': _payload['url_canonical_md5'],
'body': _payload['url_canonical']
},
],
dbi=dbi)
# do the insert
sql = "INSERT INTO `articles` (" \
"`title`, `pub_ts`, `created_on`, " \
"`feed_id`, `ctlr_id`, " \
"`url_hash`, `url_read_hash`, `url_canonical_hash`, " \
"`meta_hash`, `html_hash`, `text_hash`, `src_hash`" \
") VALUES(" \
"%(title)s, %(pub_ts)s, CURRENT_TIMESTAMP, " \
"(SELECT `feed_id` FROM `feeds` WHERE `url` = %(feed_url)s), " \
"(SELECT `ctlr_id` FROM `ctlrs` WHERE `classname` = %(ctlr_classname)s), " \
"UNHEX(%(url_md5)s), UNHEX(%(url_read_md5)s), UNHEX(%(url_canonical_md5)s)," \
"UNHEX(%(meta_md5)s), UNHEX(%(html_md5)s), UNHEX(%(text_md5)s), UNHEX(%(src_md5)s)" \
") ON DUPLICATE KEY UPDATE last_seen_on = CURRENT_TIMESTAMP"
DB.execute(sql, _payload, dbi=dbi)
