我正在使用scrapy抓取一个网站的外部链接,并将这些链接存储到MYSQl db。我在我的代码中使用了一个片段。当我运行蜘蛛时,我看到链接被废弃但给出错误
2018-03-07 13:33:27 [scrapy.log] 错误:字符串格式化期间并非所有参数都转换
很明显,由于点、斜线、逗号和破折号,链接没有被转换为字符串。那么我怎样才能传递链接并在没有错误的情况下存储它们。TIA
管道.py
from scrapy import log
from twisted.enterprise import adbapi
import MySQLdb.cursors
class MySQLStorePipeline(object):
def __init__(self):
self.dbpool = adbapi.ConnectionPool('MySQLdb', db='usalogic_testdb',
user='root', passwd='1234', cursorclass=MySQLdb.cursors.DictCursor,
charset='utf8', use_unicode=True)
def process_item(self, item, spider):
# run db query in thread pool
query = self.dbpool.runInteraction(self._conditional_insert, item)
query.addErrback(self.handle_error)
return item
def _conditional_insert(self, tx, item):
# create record if doesn't exist.
# all this block run on it's own thread
tx.execute("select * from test where link = %s", (item['link'], ))
result = tx.fetchone()
if result:
log.msg("Item already stored in db: %s" % item, level=log.DEBUG)
else:
tx.execute(\
"insert into test (link) "
"values (%s)",
(item['link'])
)
log.msg("Item stored in db: %s" % item, level=log.DEBUG)
def handle_error(self, e):
log.err(e)
当给出运行命令时, ITEMS.py
class CollectUrlItem(scrapy.Item):
link = scrapy.Field()
设置.py
ITEM_PIPELINES = {
'rvca4.pipelines.MySQLStorePipeline': 800,
}