def sync_data2mongodb(logger=None):
logger.info(Colored.green("[Data2MongoDB]: 正在从 redis 同步数据到 mongodb----"))
items = rdb.spop(STORE_TOPIC, count=500)
index = 0
wait_publish_ids = []
for item in items:
try:
json_dict = json.loads(item)
collection = json_dict.get('data_table', "").split(AT)[1]
del json_dict['data_table']
_id = json_dict['_id']
if _id == '1d33c55f57dd60237f2657028814b638':
continue
if insert_data(collection, json_dict):
logger.info(
Colored.blue(
"[Data2MongoDB]: db:{1} >> content 的 id==>{0}".format(
json_dict.get('_id'), collection)))
wait_publish_ids.append(
(PUBLISHED.format(collection), json_dict['_id']))
index += 1
except Exception as e:
rdb.sadd(STORE_TOPIC, item)
logger.error(Colored.red("[Data2MongoDB]: 发生错误>>>{0},".format(e)),
exc_info=True)
try:
pipeline = rdb_publish.pipeline(transaction=False)
for key, value in wait_publish_ids:
pipeline.sadd(key, value)
pipeline.execute()
except Exception as e:
logger.error(Colored.red(
"[Data2MongoDB]: 推送到 redis 发生错误>>>{0},".format(e)),
exc_info=True)
logger.info(Colored.blue("[Data2MongoDB]: 当前轮次共同步条数==>{0}".format(index)))
def _parameter_expression_handler(self, expression, parameters):
"""
参数表达式处理
:param expression: 参数表达式
:return: 参数表达式的结果
"""
expression_result = {}
self.logger.info(
Colored.blue(
"[Liz2Bird-_parameter_expression_handler()]: 参数处理模板 =>{0}".
format(expression)))
try:
# 表达式中包含dot
if DOT in expression and 'http' not in expression:
left, rights = expression.split(DOT, 1)
# 包含process处理
if left == PROCESSES:
number = rights[0]
process = self.queue.find(PROCESSES_TOPIC.format(
parameters['spider_name']),
way=WayType.HGET,
key=number)
process_template = self.middlewares[
2].middle_origin2engine(process)[0]
expression_result = HTTPProcessTemplate(**process_template)
# 包含result处理
elif left == RESULTS:
number, *parameter_name = rights.split(DOT)
if len(parameter_name) == 0:
result = self.queue.find(RESULTS_TOPIC.format(
parameters['spider_name']),
way=WayType.HGET,
key=number)
result_template = self.middlewares[
2].middle_origin2engine(result)[0]
expression_result = HTTPResultTemplate(
**result_template)
else:
value = parameters.get(parameter_name[0], None)
expression_result = {parameter_name[0]: value}
# 包含$处理
elif left == DOLLAR:
parameter_name = rights
value = parameters.get(parameter_name, None)
expression_result = {parameter_name: value}
else:
expression_result = {expression: expression}
except Exception as e:
self.logger.error(Colored.red(
"[Liz2Bird-_parameter_expression_handler()]: 出现处理错误>>>{0}".
format(e)),
exc_info=True)
raise e
finally:
return expression_result
def _result_template_handler(self, result_template, data, parameters):
"""
结果template的处理
:param result_template: 结果template
:param data: 数据
:return: 结果template的普通映射结果, 以及generator 的映射结果
"""
temp_results = {}
temp_generator_results = {}
temp_parameters = {k: v for k, v in parameters.items()}
try:
# 处理result 模板的各个字段
field_dict = result_template.field_dict
if result_template.global_parameter is not None and isinstance(
result_template.global_parameter, str):
global_parameters = [
p.strip()
for p in result_template.global_parameter.split(AND)
]
self.logger.info(
Colored.blue(
"[Liz2Bird-_result_template_handler()]: 全局参数>>>>{0}".
format(', '.join(global_parameters))))
else:
global_parameters = []
for field, expression in field_dict.items():
if field in EXCLUDE_FIELD:
continue
self.logger.info(
Colored.blue(
"Liz2Bird-_result_template_handler()]: result 处理字典>>>> (<{0}::{1}>)"
.format(field, expression)))
# 起始下划线，则直接eval运行
if field.startswith(UNDER_LINE):
expression_result = eval(expression)
elif isinstance(expression, str):
# 起始//采用format_data获得结果
if expression.startswith(DIAGONAL):
expression_result = format_data(data, expression)
# 包含::的 css 提取数据
elif COLON in expression:
expression_result = format_data(data, expression)
# 包含>采用format_data获得结果
elif GREATER_THAN in expression:
expression_result = format_data(data, expression)
# 包含@的正则匹配
elif AT in expression:
exp, temp_data_field = expression.split(AT)
data_field, reg_idx = temp_data_field.split(HASH)
temp_data = temp_parameters.get(data_field)
if isinstance(temp_data, list):
expression_result = []
for temp_da in temp_data:
expression_one = format_data(
temp_da, exp, reg_idx)
expression_result.append(expression_one)
else:
expression_result = format_data(
temp_data, exp, reg_idx)
# 包含$符号的拼接字段
elif expression.startswith(DOLLAR):
at_parameters_name = PARAMETER.findall(expression)
one_parameters = {}
dict_parameter = {}
for at_parameter_name in at_parameters_name:
parameter_value = temp_parameters.get(
at_parameter_name, None)
if isinstance(parameter_value, list):
dict_parameter.setdefault(
at_parameter_name, parameter_value)
else:
one_parameters.setdefault(
at_parameter_name, parameter_value)
# 处理 format 表达式
extend_parameters_group = []
one_round = 0
if len(dict_parameter) > 0:
for key, value_list in dict_parameter.items():
# 扩展参数组
for index, value in enumerate(value_list):
if index == one_round:
copy_one = deepcopy(one_parameters)
copy_one.update({key: value})
extend_parameters_group.append(
copy_one)
one_round += 1
else:
extend_parameters_group[index].update(
{key: value})
if len(extend_parameters_group) > 0:
expression_result = [
expression.replace(
DOLLAR, "").format(**parameters_group)
for parameters_group in extend_parameters_group
]
else:
expression_result = expression.replace(
DOLLAR, "").format(**one_parameters)
elif LEFT_BRACE in expression and RIGHT_BRACE in expression:
# 包含{xxx}的参数，进行计算
at_parameters_name = PARAMETER.findall(expression)
total_parameters = {}
for at_parameter_name in at_parameters_name:
if at_parameter_name in global_parameters:
site = HASH_MAP.format(
temp_parameters['site_name'])
parameter_value = self.queue.find(
"{site}:{spider}:{key}".format(
site=site,
spider=temp_parameters['spider_name'],
key=at_parameter_name),
way=WayType.GET,
key=at_parameter_name)
if isinstance(parameter_value, bytes):
parameter_value = parameter_value.decode(
'utf-8')
total_parameters.setdefault(
at_parameter_name, parameter_value)
else:
parameter_value = temp_parameters.get(
at_parameter_name, None)
total_parameters.setdefault(
at_parameter_name, parameter_value)
expression_result = eval(
expression.format(**total_parameters))
else:
# 否则直接返回原结果
expression_result = expression
else:
# 否则直接返回原结果
expression_result = expression
# 更新 global 参数
if field in global_parameters:
if isinstance(expression_result, str):
expression_result_ = expression_result.encode('utf-8')
else:
expression_result_ = expression_result
site = HASH_MAP.format(temp_parameters['site_name'])
self.queue.commit_data("{site}:{spider}:{key}".format(
site=site,
spider=temp_parameters['spider_name'],
key=field),
key=field,
value=expression_result_,
way=WayType.SET)
self.logger.info(
Colored.white(
"Liz2Bird-_result_template_handler()]: 提交全局参数>>>> (<{0}: {1}>)"
.format(field, expression_result)))
# 更新模板结果, result模板字典
if isinstance(expression_result, list):
temp_generator_results.update({field: expression_result})
else:
temp_results.update({field: expression_result})
temp_parameters.update({field: expression_result})
except Exception as e:
self.logger.error(Colored.red(
"[Liz2Bird-_result_template_handler()]: 出现处理错误>>>{0}....(@ $ _ $ @)----"
.format(e)),
exc_info=True)
return temp_results, temp_generator_results
def __str__(self):
return Colored.blue('<Process [{0}]:[{1}]>'.format(
self.process_id, self.process_method))
