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我需要得到一个tracback错误的帮助。在某些情况下，我有一个scrapy蜘蛛，很明显会出现一些处理错误，它意味着要废弃一个网站并在MongoDB中存储URL，Date和Title。我不确定该在哪里开始调试。这里是错误;在Python/Scrapy中调试回溯函数
2016-02-19 18:34:47 [scrapy] DEBUG: Crawled (200) <GET http://www.stuff.co.nz/business/farming/77040713/farmer-thomas-king-loses-supreme-court-case-over-farm-eviction> (referer: http://www.stuff.co.nz/business/)
2016-02-19 18:34:47 [scrapy] ERROR: Error processing {'date': 'Thu Feb 18 19:49:51 UTC 2016',
'title': 'Farmer loses eviction case',
'url': 'http://www.stuff.co.nz/business/farming/77040713/farmer-thomas-king-loses-supreme-court-case-over-farm-eviction'}
Traceback (most recent call last):
File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 588, in _runCallbacks
current.result = callback(current.result, *args, **kw)
File "/usr/lib/python2.7/site-packages/scrapy_mongodb.py", line 222, in process_item
return self.insert_item(item, spider)
File "/usr/lib/python2.7/site-packages/scrapy_mongodb.py", line 251, in insert_item
self.collection.insert(item, continue_on_error=True)
File "/usr/lib64/python2.7/site-packages/pymongo/collection.py", line 1926, in insert
check_keys, manipulate, write_concern)
File "/usr/lib64/python2.7/site-packages/pymongo/collection.py", line 430, in _insert
gen(), check_keys, self.codec_options, sock_info)
File "/usr/lib64/python2.7/site-packages/pymongo/pool.py", line 254, in write_command
helpers._check_command_response(result)
File "/usr/lib64/python2.7/site-packages/pymongo/helpers.py", line 188, in _check_command_response
raise OperationFailure(msg % errmsg, code, response)
OperationFailure: not authorized on article to execute command { insert: "stuffconz", ordered: false, writeConcern: { fsync: false }, documents: [ { _id: ObjectId('56c6a97702f22371605f4668'), url: "http://www.stuff.co.nz/business/farming/77040713/farmer-thomas-king-loses-supreme-court-case-over-farm-eviction", date: "Thu Feb 18 19:49:51 UTC 2016", title: "Farmer loses eviction case" } ] }
这是scrapy蜘蛛;
from __future__ import absolute_import
from scrapy import Spider
from scrapy.selector import Selector
from scrapy.http import Request
from scrapy.linkextractors import LinkExtractor
from harland.items import *
from scrapy.spiders import CrawlSpider, Rule
class StuffSpider(CrawlSpider):
name = "stuff"
allowed_domains = ["stuff.co.nz"]
start_urls = [
"http://stuff.co.nz/business/",
]
rules = (
Rule(LinkExtractor(allow=".*/business.*"), callback='parse_article_page', follow=True),
)
def parse_article_page(self, response):
article = Selector(response)
page = Selector(response).xpath('/html/head/meta[9]')
page_type = page.xpath('//meta[@property="og:type"]/@content').extract()[0]
if "article" in page_type:
item = StuffItem()
item_url = page.xpath('//meta[@property="og:url"]/@content').extract()[0]
item['url'] = str(item_url)
item_title = page.xpath('//meta[@property="og:title"]/@content').extract()[0]
item['title'] = str(item_title)
item_date = page.xpath('//*[@itemprop="datePublished"]/@content').extract()[0]
item['date'] = str(item_date)
yield item
而这里的管道，直接从这里取：https://github.com/sebdah/scrapy-mongodb/blob/master/scrapy_mongodb.py
"""
scrapy-mongodb - MongoDB pipeline for Scrapy
Homepage: https://github.com/sebdah/scrapy-mongodb
Author: Sebastian Dahlgren <[email protected]>
License: Apache License 2.0 <http://www.apache.org/licenses/LICENSE-2.0.html>
Copyright 2013 Sebastian Dahlgren
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""
import datetime
from pymongo import errors
from pymongo.mongo_client import MongoClient
from pymongo.mongo_replica_set_client import MongoReplicaSetClient
from pymongo.read_preferences import ReadPreference
from scrapy import log
from scrapy.contrib.exporter import BaseItemExporter
VERSION = '0.9.1'
def not_set(string):
""" Check if a string is None or ''
:returns: bool - True if the string is empty
"""
if string is None:
return True
elif string == '':
return True
return False
class MongoDBPipeline(BaseItemExporter):
""" MongoDB pipeline class """
# Default options
config = {
'uri': 'mongodb://harland:[email protected]:27017',
'fsync': False,
'write_concern': 0,
'database': 'article',
'collection': 'stuffconz',
'replica_set': None,
'unique_key': None,
'buffer': None,
'append_timestamp': True,
'stop_on_duplicate': 0,
}
# Item buffer
current_item = 0
item_buffer = []
# Duplicate key occurence count
duplicate_key_count = 0
def load_spider(self, spider):
self.crawler = spider.crawler
self.settings = spider.settings
# Versions prior to 0.25
if not hasattr(spider, 'update_settings') and hasattr(spider, 'custom_settings'):
self.settings.setdict(spider.custom_settings or {}, priority='project')
def open_spider(self, spider):
self.load_spider(spider)
# Configure the connection
self.configure()
if self.config['replica_set'] is not None:
connection = MongoReplicaSetClient(
self.config['uri'],
replicaSet=self.config['replica_set'],
w=self.config['write_concern'],
fsync=self.config['fsync'],
read_preference=ReadPreference.PRIMARY_PREFERRED)
else:
# Connecting to a stand alone MongoDB
connection = MongoClient(
self.config['uri'],
fsync=self.config['fsync'],
read_preference=ReadPreference.PRIMARY)
# Set up the collection
database = connection[self.config['database']]
self.collection = database[self.config['collection']]
log.msg(u'Connected to MongoDB {0}, using "{1}/{2}"'.format(
self.config['uri'],
self.config['database'],
self.config['collection']))
# Ensure unique index
if self.config['unique_key']:
self.collection.ensure_index(self.config['unique_key'], unique=True)
log.msg(u'Ensuring index for key {0}'.format(
self.config['unique_key']))
# Get the duplicate on key option
if self.config['stop_on_duplicate']:
tmpValue = self.config['stop_on_duplicate']
if tmpValue < 0:
log.msg(
(
u'Negative values are not allowed for'
u' MONGODB_STOP_ON_DUPLICATE option.'
),
level=log.ERROR
)
raise SyntaxError(
(
'Negative values are not allowed for'
' MONGODB_STOP_ON_DUPLICATE option.'
)
)
self.stop_on_duplicate = self.config['stop_on_duplicate']
else:
self.stop_on_duplicate = 0
def configure(self):
""" Configure the MongoDB connection """
# Handle deprecated configuration
if not not_set(self.settings['MONGODB_HOST']):
log.msg(
u'DeprecationWarning: MONGODB_HOST is deprecated',
level=log.WARNING)
mongodb_host = self.settings['MONGODB_HOST']
if not not_set(self.settings['MONGODB_PORT']):
log.msg(
u'DeprecationWarning: MONGODB_PORT is deprecated',
level=log.WARNING)
self.config['uri'] = 'mongodb://{0}:{1:i}'.format(
mongodb_host,
self.settings['MONGODB_PORT'])
else:
self.config['uri'] = 'mongodb://{0}:27017'.format(mongodb_host)
if not not_set(self.settings['MONGODB_REPLICA_SET']):
if not not_set(self.settings['MONGODB_REPLICA_SET_HOSTS']):
log.msg(
(
u'DeprecationWarning: '
u'MONGODB_REPLICA_SET_HOSTS is deprecated'
),
level=log.WARNING)
self.config['uri'] = 'mongodb://{0}'.format(
self.settings['MONGODB_REPLICA_SET_HOSTS'])
# Set all regular options
options = [
('uri', 'MONGODB_URI'),
('fsync', 'MONGODB_FSYNC'),
('write_concern', 'MONGODB_REPLICA_SET_W'),
('database', 'MONGODB_DATABASE'),
('collection', 'MONGODB_COLLECTION'),
('replica_set', 'MONGODB_REPLICA_SET'),
('unique_key', 'MONGODB_UNIQUE_KEY'),
('buffer', 'MONGODB_BUFFER_DATA'),
('append_timestamp', 'MONGODB_ADD_TIMESTAMP'),
('stop_on_duplicate', 'MONGODB_STOP_ON_DUPLICATE')
]
for key, setting in options:
if not not_set(self.settings[setting]):
self.config[key] = self.settings[setting]
# Check for illegal configuration
if self.config['buffer'] and self.config['unique_key']:
log.msg(
(
u'IllegalConfig: Settings both MONGODB_BUFFER_DATA '
u'and MONGODB_UNIQUE_KEY is not supported'
),
level=log.ERROR)
raise SyntaxError(
(
u'IllegalConfig: Settings both MONGODB_BUFFER_DATA '
u'and MONGODB_UNIQUE_KEY is not supported'
))
def process_item(self, item, spider):
""" Process the item and add it to MongoDB
:type item: Item object
:param item: The item to put into MongoDB
:type spider: BaseSpider object
:param spider: The spider running the queries
:returns: Item object
"""
item = dict(self._get_serialized_fields(item))
if self.config['buffer']:
self.current_item += 1
if self.config['append_timestamp']:
item['scrapy-mongodb'] = {'ts': datetime.datetime.utcnow()}
self.item_buffer.append(item)
if self.current_item == self.config['buffer']:
self.current_item = 0
return self.insert_item(self.item_buffer, spider)
else:
return item
return self.insert_item(item, spider)
def close_spider(self, spider):
""" Method called when the spider is closed
:type spider: BaseSpider object
:param spider: The spider running the queries
:returns: None
"""
if self.item_buffer:
self.insert_item(self.item_buffer, spider)
def insert_item(self, item, spider):
""" Process the item and add it to MongoDB
:type item: (Item object) or [(Item object)]
:param item: The item(s) to put into MongoDB
:type spider: BaseSpider object
:param spider: The spider running the queries
:returns: Item object
"""
if not isinstance(item, list):
item = dict(item)
if self.config['append_timestamp']:
item['scrapy-mongodb'] = {'ts': datetime.datetime.utcnow()}
if self.config['unique_key'] is None:
try:
self.collection.insert(item, continue_on_error=True)
log.msg(
u'Stored item(s) in MongoDB {0}/{1}'.format(
self.config['database'], self.config['collection']),
level=log.DEBUG,
spider=spider)
except errors.DuplicateKeyError:
log.msg(u'Duplicate key found', level=log.DEBUG)
if (self.stop_on_duplicate > 0):
self.duplicate_key_count += 1
if (self.duplicate_key_count >= self.stop_on_duplicate):
self.crawler.engine.close_spider(
spider,
'Number of duplicate key insertion exceeded'
)
pass
else:
key = {}
if isinstance(self.config['unique_key'], list):
for k in dict(self.config['unique_key']).keys():
key[k] = item[k]
else:
key[self.config['unique_key']] = item[self.config['unique_key']]
self.collection.update(key, item, upsert=True)
log.msg(
u'Stored item(s) in MongoDB {0}/{1}'.format(
self.config['database'], self.config['collection']),
level=log.DEBUG,
spider=spider)
return item
如果有人可以只点我在正确的方向，将是这样的帮助！我已经玩了好几天了，但是我开始觉得我对Python和scrapy还不够了解。
干杯，
我对MongoDB并不熟悉，但是在尝试将文档插入到“文章”集合中时，这看起来像是权限/授权错误。据我所知，这不是一个scrapy问题。来自''mongodb：// harland：Ase0peedi @ localhost：27017'的证书是否在尝试向mongodb客户端插入文档时工作？ –
是的，这些都是证书，这很奇怪，因为我可以使用这些证书对数据库进行身份验证......但是一旦Scrapy试图插入某些内容，我会收到验证错误。我真的被卡住了！ – Hamish