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etl.py
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etl.py
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# coding=utf-8
__author__ = 'zhaoyiming'
import re;
import extends
import urllib
import spider;
import json;
import html
import xml.etree.ElementTree as ET
modules = {};
tables = {};
connectors = {}
# translate Int/string
intattrs = re.compile('Max|Min|Count|Index|Interval|Position');
boolre = re.compile('^(One|Can|Is)|Enable|Should|Have');
rescript = re.compile('Regex|Number')
def getMatchCount(mat):
return mat.lastindex if mat.lastindex is not None else 1;
def RegexFT(etl, data):
v = etl.Regex.findall(data);
if v is None:
return False;
else:
return etl.Count >= len(v)
def RangeFT(etl, item):
f = float(item)
return etl.Min <= f <= etl.Max;
def RepeatFT(etl, data):
if data in etl.set:
return False;
else:
etl.set.append(data);
return True;
def NullFT(etl, data):
if data is None:
return False;
if isinstance(data, str):
return data.strip() != '';
return True;
def AddNewTF(etl, data):
return etl.NewValue;
def AutoIndexTF(etl, data):
etl.currindex += 1;
return etl.currindex;
def RenameTF(etl, data):
if not etl.Column in data:
return;
item = data[etl.Column];
del data[etl.Column];
if etl.NewColumn != "":
data[etl.NewColumn] = item;
def DeleteTF(etl, data):
if etl.Column in data:
del data[etl.Column];
def HtmlTF(etl, data):
return html.escape(data) if etl.ConvertType == 'Encode' else html.unescape(data);
def UrlTF(etl, data):
if etl.ConvertType == 'Encode':
url = data.encode('utf-8');
return urllib.parse.quote(url);
else:
return urllib.parse.unquote(data);
def RegexSplitTF(etl, data):
items = re.split(etl.Regex, data)
if len(items) <= etl.Index:
return data;
if not etl.FromBack:
return items[etl.Index];
else:
index = len(items) - etl.Index - 1;
if index < 0:
return data;
else:
return items[index];
def MergeTF(etl, data):
if etl.MergeWith == '':
columns = [];
else:
columns = [str(data[r]) for r in etl.MergeWith.split(' ')]
columns.insert(0, data[etl.Column] if etl.Column in data else '');
res = etl.Format;
for i in range(len(columns)):
res = res.replace('{' + str(i) + '}', str(columns[i]))
return res;
def ReReplaceTF(etl, data):
return re.sub(etl.Regex, etl.ReplaceText, data);
def RegexTF(etl, data):
item = re.findall(etl.Regex, str(data));
if etl.Index < 0:
return '';
if len(item) <= etl.Index:
return '';
else:
r = item[etl.Index];
return r if isinstance(r, str) else r[0];
def NumberTF(etl, data):
t = RegexTF(etl, data);
if t is not None and t != '':
return int(t);
return t;
def SplitTF(etl, data):
splits = etl.SplitChar.split(' ');
sp = splits[0]
if sp == '':
return data;
r = data.split(splits[0])[etl.Index];
return r;
def TrimTF(etl, data):
return data.strip();
def StrExtractTF(etl, data):
start = data.find(etl.Former);
if start == -1:
return
end = data.find(etl.End, start);
if end == -1:
return;
if etl.HaveStartEnd:
end += len(etl.End);
if not etl.HaveStartEnd:
start += len(etl.Former);
return data[start:end];
def PythonTF(etl, data):
if len(etl.Script.split('\n')) == 1:
result = eval(etl.Script, {'value': data[etl.Column]}, data);
if result is not None:
key = etl.NewColumn if etl.NewColumn != '' else etl.Column;
data[key] = result;
else:
exec(etl.Script, None, data);
def CrawlerTF(etl, data):
crawler = etl.crawler;
url = data[etl.Column];
buff = etl.buff;
if url in buff:
datas = buff[url];
else:
datas = crawler.CrawData(url);
if len(buff) < 100:
buff[url] = datas;
if etl.crawler.IsMultiData == 'List':
for d in datas:
res = extends.MergeQuery(d, data, etl.NewColumn);
yield res;
else:
data = extends.Merge(data, datas);
yield data;
def XPathTF(etl, data):
from lxml import etree
if etl.IsManyData:
tree = spider.GetHtmlTree(data[etl.Column]);
nodes = tree.xpath(etl.XPath);
for node in nodes:
ext = {'Text': spider.getnodetext(node), 'HTML': etree.tostring(node).decode('utf-8')};
ext['OHTML'] = ext['HTML']
yield extends.MergeQuery(ext, data, etl.NewColumn);
else:
tree = spider.GetHtmlTree(data[etl.Column]);
nodes = tree.xpath(etl.XPath);
data[etl.NewColumn] = nodes[0].text;
yield data;
def ToListTF(etl, data):
yield data;
def JsonTF(etl, data):
js = json.loads(data[etl.Column]);
if isinstance(js, list):
for j in js:
yield j;
else:
yield js;
def RangeFT(etl, data):
skip = int(extends.Query(data, etl.Skip));
take = int(extends.Query(data, etl.Take));
i = 0;
for r in data:
if i < skip:
continue;
if i >= take:
break;
i += 1;
yield r;
def EtlGE(etl, data):
subetl = modules[etl.ETLSelector];
index = etl.Tool.AllETLTools.index(etl)
def checkname(item, name):
if hasattr(item, "Name") and item.Name == name:
return True;
return False;
tools = extends.Append((r for r in etl.Tool.AllETLTools[:index] if checkname(r, etl.Insert)),
(r for r in subetl.AllETLTools if not checkname(r, etl.Insert)))
for r in subetl.__generate__(tools):
yield r;
def RangeGE(etl, data):
interval = int(extends.Query(data, etl.Interval));
maxvalue = int(extends.Query(data, etl.MaxValue));
minvalue = int(extends.Query(data, etl.MinValue));
repeat = int(extends.Query(data, etl.RepeatCount));
for i in range(minvalue, maxvalue, interval):
j = repeat;
while j > 0:
item = {etl.Column: round(i, 5)};
yield item;
j -= 1;
def TextGE(etl, data):
for i in range(etl.Position, len(etl.arglists)):
yield {etl.Column: etl.arglists[i]}
def MongoConnect(etl, datas, type):
import pymongo
if not etl.Init:
client = pymongo.MongoClient('localhost', 27017);
db = client[etl.connector.DBName];
if etl.ExecuteType == 'OnlyInsert':
etl.Table = db[etl.NewTaleName];
else:
etl.Table = db[etl.TableName];
etl.Init = True
else:
etype = etl.ExecuteType;
table = etl.Table;
if type == 'r':
work = {'OnlyInsert': lambda d: table.insert(d)};
for data in datas:
work[etype](data);
yield data;
else:
for data in table.find():
yield data;
def FileConnect(etl, datas, type):
path = etl.NewTableName;
filetype = path.split('.')[-1].lower();
encode = 'utf-8';
if not etl.Init:
file=open(path, type, encoding=encode)
etl.file = file;
etl.filetype = filetype;
if filetype in ['csv', 'txt']:
sp = ',' if filetype == 'csv' else '\t';
if not etl.Init:
import csv
if type == 'w':
field = extends.getkeys(datas);
etl.writer = csv.DictWriter(file, field, delimiter=sp, lineterminator='\n')
etl.writer.writeheader()
etl.Init = True;
if type == 'r':
reader = csv.DictReader(file, delimiter=sp)
for r in reader:
yield r;
else:
for data in datas:
etl.writer.writerow(data);
yield data;
elif filetype == 'json':
if type == 'r':
items = json.load(file);
for r in items:
yield r;
else:
file.write('[')
for data in datas:
json.dump(data, file, ensure_ascii=False)
file.write(',');
yield data;
etl.Init = True
def DbConnect(etl, datas, type):
etl.connector = connectors[etl.Connector];
if etl.connector.TypeName == 'MongoDB':
return MongoConnect(etl, datas, type);
else:
return FileConnect(etl, datas, type);
def TableEX(etl, datas):
tname = etl.NewTableName;
if tname not in tables:
tables[tname] = [];
for r in datas:
tables[tname].append(r);
yield r;
def SaveFileExe(etl, data):
save_path = extends.Query(data, etl.SavePath);
urllib.request.urlretrieve(data[etl.Column], save_path)
def filter(tool, data):
for r in data:
item = None;
if tool.Column in r:
item = r[tool.Column];
if item is None and tool.Func != NullFT:
continue;
result = tool.Func(tool, item)
if result == True and tool.Revert == 'False':
yield r;
elif result == False and tool.Revert == 'True':
yield r;
def transform(tool, data):
func = tool.Func;
if tool.IsMultiYield: # one to many
for r in data:
for p in func(tool, r):
yield p;
return;
for d in data: # one to one
if tool.OneOutput:
if tool.Column not in d or tool.Column not in d:
yield d;
continue;
item = d[tool.Column] if tool.OneInput else d;
res = func(tool, item)
if tool.NewColumn != '':
d[tool.NewColumn] = res
else:
d[tool.Column] = res
else:
func(tool, d)
yield d;
def GetChildNode(roots, name):
for etool in roots:
if etool.get('Name') == name or etool.tag == name:
return etool;
return None;
def InitFromHttpItem(config, item):
httprib = config.attrib;
paras = spider.Para2Dict(httprib['Parameters'], '\n', ':');
item.Headers = paras;
item.Url = httprib['URL'];
post = 'Postdata';
if post in httprib:
item.postdata = httprib[post];
else:
item.postdata = None;
def SetAttr(etl, key, value):
if intattrs.search(key) is not None:
try:
t = int(value);
setattr(etl, key, t);
except ValueError:
print('it is a ValueError')
setattr(etl, key, value);
elif boolre.search(key) is not None:
setattr(etl, key, True if value == 'True' else False);
else:
setattr(etl, key, value);
class EObject(object):
pass;
def LoadProject(path):
tree = ET.parse(path);
root = tree.getroot();
root = root.find('Doc');
for etool in root:
if etool.tag == 'Children':
etype = etool.get('Type');
name = etool.get('Name');
if etype == 'SmartETLTool':
etltool = ETLTool();
for m in etool:
if m.tag == 'Children':
etl = EObject();
for att in m.attrib:
SetAttr(etl, att, m.attrib[att]);
etltool.AllETLTools.append(etl);
modules[name] = etltool;
elif etype == 'SmartCrawler':
import spider;
crawler = spider.SmartCrawler();
crawler.Name = etool.attrib['Name'];
crawler.IsMultiData = etool.attrib['IsMultiData']
httpconfig = GetChildNode(etool, 'HttpSet');
InitFromHttpItem(httpconfig, crawler.HttpItem);
login = GetChildNode(etool, 'Login');
if login is not None:
crawler.Login = spider.HTTPItem();
InitFromHttpItem(login, crawler.Login);
crawler.CrawItems = [];
for child in etool:
if child.tag == 'Children':
crawitem = spider.CrawItem(child.attrib['Name']);
crawitem.XPath = str(spider.XPath(spider.XPath(child.attrib['XPath'])[1:]))
crawler.CrawItems.append(crawitem);
if crawler.IsMultiData == 'List':
crawler.CrawItems = spider.CompileCrawItems(crawler.CrawItems);
modules[name] = crawler;
elif etool.tag == 'DBConnections':
for tool in etool:
if tool.tag == 'Children':
connector = EObject();
for att in tool.attrib:
SetAttr(connector, att, tool.attrib[att]);
connectors[connector.Name] = connector;
for name in modules:
module = modules[name];
if not isinstance(module, ETLTool):
continue
for tool in module.AllETLTools:
module.ETLInit(tool)
print('load project success')
class ETLTool(object):
def __init__(self):
self.AllETLTools = [];
def ETLInit(self, etl):
etl.Tool = self;
if etl.Type == 'DbGE':
etl.Func = lambda tool, data: DbConnect(tool, data, 'r');
etl.Init = False;
elif etl.Type == 'DbEX':
etl.Func = lambda tool, data: DbConnect(tool, data, 'w');
etl.Init = False;
else:
etl.Func = eval(etl.Type);
if rescript.match(etl.Type):
etl.Regex = re.compile(etl.Script);
if etl.Func == RepeatFT:
etl.set = [];
elif etl.Func == AutoIndexTF:
etl.currindex = 0;
elif etl.Func in [CrawlerTF, XPathTF]:
etl.IsMultiYield = True;
elif etl.Func == TextGE:
etl.arglists = [r.strip() for r in etl.Content.split('\n')];
if etl.Func == CrawlerTF:
etl.crawler = modules[etl.CrawlerSelector];
etl.buff = {};
if etl.Func in [RegexTF, NumberTF, TrimTF, UrlTF, RegexFT, SplitTF, HtmlTF]:
etl.OneInput = True;
else:
etl.OneInput = False;
def __generate__(self, tools, generator=None, execute=False):
for tool in tools:
if tool.Group == 'Generator':
if generator is None:
generator = tool.Func(tool, None);
else:
if tool.MergeType == 'Append':
generator = extends.Append(generator, tool.Func(tool, None));
elif tool.MergeType == 'Merge':
generator = extends.MergeAll(generator, tool.Func(tool, None));
elif tool.MergeType == 'Cross':
generator = extends.Cross(generator, tool.Func, tool)
elif tool.Group == 'Transformer':
generator = transform(tool, generator);
elif tool.Group == 'Filter':
generator = filter(tool, generator);
elif tool.Group == 'Executor' and execute:
generator = tool.Func(tool, generator);
return generator;
def QueryDatas(self, etlCount=100, execute=False):
return self.__generate__((tool for tool in self.AllETLTools[:etlCount] if tool.Enabled), None, execute);
def Close(self):
for tool in self.AllETLTools:
if tool.Type in ['DbGE', 'DbEX']:
if tool.connector.TypeName == 'FileManager':
if tool.filetype == 'json':
tool.file.write('{}]');
tool.file.close();
def mThreadExecute(self, threadcount=10):
import threadpool
pool = threadpool.ThreadPool(threadcount)
tools = [tool for tool in self.AllETLTools if tool.Enabled];
index = extends.getindex(tools, lambda d: d.Type == 'ToListTF');
if index == -1:
index = 0;
tool = tools[index];
generator = tool.Func(tool, None);
else:
generator = self.__generate__(tools[:index]);
def Funcs(item):
mgenerator = self.__generate__(tools[index + 1:], (r for r in [item]), True);
for r in mgenerator:
pass;
print('finish' + str(item));
requests = threadpool.makeRequests(Funcs, generator);
[pool.putRequest(req) for req in requests]
pool.wait()
# self.__close__()