def __init__(self, settings=None, spidercls=None):
if isinstance(settings, dict) or settings is None:
settings = Setting(settings)
self.settings = settings
self.lfs = load_object(self.settings['LOG_FORMATTER_CLASS'])
self.lfm = self.lfs.from_settings(self.settings)
logger.info(*self.lfm.crawled("CrawlerRunner", '', '已初始化'))
self.spider_loder = []
# 装载的是Crawler的集合
self._crawlers = set()
# 装载的是defer的集合
self._active = set()
# 子爬虫的数量
self.MAX_CHILD_NUM = 9
if not spidercls:
# 子爬虫的类
self.spidercls = spidercls
else:
# 从设置中导入子爬虫的类
self.spidercls = load_object(self.settings['SPIDER_CHILD_CLASS'])
# task完成标志位
self.task_finish = False
self.slot = None
self.running = False
self._task_schedule = queue.Queue()
def __init__(self, crawler, spider_closed_callback):
# 获取log的格式
self.lfm = crawler.logformatter
# logger.debug("Engine 已初始化")
logger.debug(
*self.lfm.crawled("Spider", crawler.spider.name, '已初始化', 'Engine'))
self.crawler = crawler
self.settings = crawler.settings
self.slot = None
self.spider = None
self.running = False
self.paused = False
self.engine_name = None
self.start_time = None
self._closewait = None
# 从settings中找到Scheduler调度器，找到Scheduler类
self.scheduler_cls = load_object(self.settings["SCHEDULER"])
# 同样，找到Downloader下载器类
downloader_cls = load_object(self.settings["DOWNLOADER"])
self.downloader = downloader_cls(crawler)
self.scraper = Scraper(crawler)
self.crawlling = []
self._spider_closed_callback = spider_closed_callback
self.flag = False
def __init__(self,tasks,settings=None,spidercls=None,name=None,logformat=None,middlewares=None):
if isinstance(settings, dict) or settings is None:
settings = Setting(settings)
self.settings = settings
self.middlewares = middlewares
if logformat:
self.lfm = logformat
else:
self.lfs = load_object(self.settings['LOG_FORMATTER_CLASS'])
self.lfm = self.lfs.from_settings(self.settings)
self.name = name if name else ''
logger.info(*self.lfm.crawled(
"CrawlerRunner", self.name,
'已初始化')
)
if isinstance(tasks,dict):
self.tasks = iter_dict(tasks)
else:
self.tasks = tasks
self.spider_loder = []
# 装载的是Crawler的集合
self._crawlers = set()
# 装载的是defer的集合
self._active = set()
self._active_finish = False
# 子爬虫的数量
if self.name:
self.MAX_CHILD_NUM = 4
else:
self.MAX_CHILD_NUM = 4
# 子爬虫的名称
# self.SPIDER_NAME_CHOICE = self.settings['SPIDER_NAME_CHOICE']
self.SPIDER_NAME_CHOICE = False
# 缓冲的地址最大数量
# self.MAX_SCHEDULE_NUM = 10
if spidercls:
# 子爬虫的类
self.spidercls = spidercls
else :
# 从设置中导入子爬虫的类
self.spidercls = load_object(self.settings['SPIDER_CHILD_CLASS'])
# task完成标志位
# self.filter_task = FilterTask(self.SPIDER_NAME_CHOICE)
# 导入队列中任务个数的最大值
self.filter_task = 10
self._push_task_finish = False
self._pull_task_finish = False
self._next_task = None
self.fifer = FilterTask(settings)
self.slot = None
self._closewait = None
self.running = False
self._pause = False
self._task_schedule = queue.Queue()
def __init__(self,
spidercls=None,
settings=None,
logformat=None,
father_name=None):
self.crawling = False
self.spider = None
self.engine = None
# 导入的是爬虫对应的模块，不是名称
self.spidercls = spidercls
self.father_name = father_name
self.settings = settings.copy()
# 获取log的格式
if not logformat:
lf_cls = load_object(self.settings['LOG_FORMATTER_CLASS'])
self.logformatter = lf_cls.from_crawler(self)
else:
self.logformatter = logformat
logger.debug(
*self.logformatter.crawled("Spider", 'None', '已初始化', "Crawler"))
self.spidercls.update_settings(self.settings)
d = dict(overridden_or_new_settings(self.settings))
if d:
logger.info(*self.logformatter.crawled(
"Spider", 'None', "添加或重写的设置如下：\n {settings}".format(
settings=d), "Crawler"))
def __init__(self,crawler):
self.settings = crawler.settings
self.lfm = crawler.logformatter
# 如果只是加载一个类不带参数，而这个类的初始化带有参数的时候，使用这个类的时候会报错
# XXX missing X required positional argument
# logger.debug("Downloader 已初始化...")
logger.debug(*self.lfm.crawled("Spider", crawler.spider.name,
'已初始化', 'Downloader'))
self.handler = load_object(self.settings["DOWNLOAD_HANDLER"])(self.lfm,self.settings)
self.spider = None
self.slots = {}
# active是一个活动集合，用于记录当前正在下载的request集合。
self.active = set()
# 从配置中获取设置的并发数
self.total_concurrency = self.settings.getint('CONCURRENT_REQUESTS')
# 同一域名并发数
self.domain_concurrency = self.settings.getint('CONCURRENT_REQUESTS_PER_DOMAIN')
# 同一IP并发数
self.ip_concurrency = self.settings.getint('CONCURRENT_REQUESTS_PER_IP')
# 随机延迟下载时间 默认是True
self.randomize_delay = self.settings.getbool('RANDOMIZE_DOWNLOAD_DELAY')
# 初始化下载器中间件
if crawler.middlewares.get('DownloaderMiddlewareManager'):
self.middleware = crawler.middlewares['DownloaderMiddlewareManager']
else:
self.middleware = DownloaderMiddlewareManager.from_crawler(crawler)
crawler.middlewares['DownloaderMiddlewareManager'] = self.middleware
# ask.LoopingCall安装了一个60s的定时心跳函数_slot_gc,这个函数用于对slots中的对象进行定期的回收。
self._slot_gc_loop = task.LoopingCall(self._slot_gc)
self._slot_gc_loop.start(60)
def __init__(self, crawler, spider_closed_callback):
logger.debug("引擎初始化")
self.crawler = crawler
self.settings = crawler.settings
# 获取log的格式
self.logformatter = crawler.logformatter
self.slot = None
self.spider = None
self.running = False
self.paused = False
# 从settings中找到Scheduler调度器，找到Scheduler类
self.scheduler_cls = load_object(self.settings["SCHEDULER"])
# 同样，找到Downloader下载器类
downloader_cls = load_object(self.settings["DOWNLOADER"])
self.downloader = downloader_cls(crawler)
self.crawlling = []
self._spider_closed_callback = spider_closed_callback
self.flag = False
def _get_spider_loader(settings):
cls_path = settings["SPIDER_MANAGER_CLASS"]
loader_cls = load_object(cls_path)
try:
verifyClass(ISpiderLoader, loader_cls)
except AttributeError as e:
logger.warning("接口方法实现不完全：", e)
except DoesNotImplement:
logger.warning("爬虫导入失败，查看设定是否爬虫爬虫导入类的地址设置" "")
return loader_cls.from_settings()
def from_settings(cls, settings, crawler=None):
"""
从default settings中加载默认的中间件
:param settings:
:param crawler:
:return:
"""
cls.lfm = crawler.logformatter
try:
mwlist = cls._get_mwlist_from_settings(settings)
middlewares = []
clsnames = []
enabled = []
for clspath in mwlist:
try:
clsname = clspath.split('.')[-1]
mwcls = load_object(clspath)
# 两个if用来判断mwcls是类的情况下，是跟crawler关联还是和settings相关联
# 用来实例化所有的中间件
if crawler and hasattr(mwcls, 'from_crawler'):
mw = mwcls.from_crawler(crawler)
elif hasattr(mwcls, 'from_settings'):
mw = mwcls.from_settings(settings)
else:
mw = mwcls
middlewares.append(mw)
enabled.append(clspath)
clsnames.append(clsname)
except Exception as e:
if e.args:
args = {'clsname': clsname, 'eargs': e.args[0]}
logger.warning(*cls.lfm.crawled(
"Middleware", cls.component_name,
'未生效:{clsname}: {eargs}'.format(**args)))
if len(middlewares) != len(clsnames):
raise ImportError("中间件载入不完整")
if middlewares and clsnames:
# logger.info("生效%(componentname)ss的Middleware :\n%(enabledlist)s",
# {'componentname': cls.component_name,
# 'enabledlist': pprint.pformat(enabled)},
# extra={'crawler': crawler})
for mw in enabled:
logger.info(*cls.lfm.crawled(
"Middleware", cls.component_name, '生效的中间件: %s' % mw))
return cls(clsnames, middlewares)
except Exception as e:
logger.error(*cls.lfm.error("Middleware",
cls.component_name,
function=None,
msg=e),
exc_info=True)
def __init__(self, spidercls=None, settings=None,logformat=None,crawlerRunner=None,middlewares=None):
self.crawling = False
self.spider = None
self.engine = None
# 导入的是爬虫对应的模块，不是名称
self.spidercls = spidercls
self.settings = settings.copy()
self.crawlerRunner = crawlerRunner
if crawlerRunner:
self.father_name = crawlerRunner.name
else:
self.father_name = None
# 获取log的格式
if not logformat:
lf_cls = load_object(self.settings['LOG_FORMATTER_CLASS'])
self.logformatter = lf_cls.from_crawler(self)
else:
self.logformatter = logformat
logger.debug(*self.logformatter.crawled(
"Crawler", 'None',
'已初始化！！！'))
self.build_time = time .clock()
self.middlewares = middlewares if middlewares is not None else dict()
if self.middlewares:
if not isinstance(middlewares,dict):
logger.warning(*self.logformatter.crawled(
'Crawler','',
'继承的中间件格式不对'
))
else:
logger.info(*self.logformatter.crawled(
'Crawler', '',
'继承中间件'
))
self.spidercls.update_settings(self.settings)
d = dict(overridden_or_new_settings(self.settings))
if d:
for k,v in d.items():
logger.info(*self.logformatter.crawled(
"Spider", 'None',
"添加或重写的设置如下：%s:%s" %(k,v),
"Crawler"))
import os, logging
from test.framework.objectimport.loadobject import load_object
from test.framework.setting import Setting
class A(object):
def __init__(self):
self.flags = "Test"
self.name = "name"
self.status = "500"
rq = A()
rp = A()
sp = A()
s = Setting()
lf = load_object(s['LOG_FORMATTER'])
logfor = lf.from_crawler(rq)
strs = logfor.crawled(rq, rp, sp)
print(strs)
def __init__(self, settings):
self.HTTPClientFactory = load_object(
settings['DOWNLOADER_HTTPCLIENTFACTORY'])
self.ClientContextFactory = load_object(
settings['DOWNLOADER_CLIENTCONTEXTFACTORY'])
