crawler

# !/usr/bin/env python
# encoding:UTF-8
from util import request_url
import re
import os
import sys
#from __future__ import print_function
from pptx import Presentation
from pptx.util import Inches
import PIL

class Crawler(object):
def __init__(self):
self.main_url = "https://mp.weixin.qq.com/s?__biz=MzA3NzIwMDM3OA==&mid=209853452&idx=1&sn=bd40e9622dca2e5bd52af08bbf870861&pass_ticket=8MmcYuwV6RkFHjUHOnxmzVg%2FEhQYTM26Zg%2FO2ZpgJVGyL6ewBt5fJc%2BEsNkytOiN"
self.media_content_pattern = re.compile('<div class="rich_media_content " id="js_content">.*?</div>',re.S)
self.item_pattern = re.compile('<p><a href="(.*?)" target=',re.S)
self.title_pattern = re.compile('<h2 class="rich_media_title" id="activity-name">(.*?)</h2>',re.S)
self.elements_content_pattern = re.compile('<p style=.*?</p>',re.S)
self.png_pattern = re.compile('data-src="(.*?)"',re.S)
self.datatype_pattern = re.compile('data-type="(.*?)"',re.S)
self.text_pattern = re.compile('>(.*?)</',re.S)
self.picid_pattern = re.compile('http://mmbiz.qpic.cn/mmbiz/(.*?)/',re.S)
self.pic_fmt_pattern = re.compile('wx_fmt=(.*?)$',re.S)
self.data_path = "../data/"
self.ppt_path = "../ppt/"

def get_item_list(self):
ret,main_page = request_url(self.main_url)
if ret == -1 or main_page == "":
print "Request main page failed!"
return
info = self.media_content_pattern.findall(main_page);
if len(info) != 0:
media_content = info[0]
else:
media_content = ""
item_list = []
if media_content:
item_info = self.item_pattern.findall(main_page);
if len(item_info) != 0:
for item_url in item_info:
print item_url
item_list.append(item_url)
title = self.get_item(item_url)
if title== "" and item_url.find("&amp;")!=-1:
item_url = item_url.replace("&amp;","&")
title = self.get_item(item_url)

def get_item(self,item_url):
ret,item_page = request_url(item_url)
if ret == -1 or item_page == "":
print "Request item page failed! %s" % item_url
return "bad"

info = self.title_pattern.findall(item_page);
if len(info) != 0:
title = info[0].strip().replace("(ppt)","")
else:
title = ""

item_path = self.data_path+"bak"
ppt_file = self.ppt_path+"bak"
if title!="":
item_path = self.data_path + title
ppt_file = self.ppt_path+ title + ".pptx"
else:
print "title is null!%s" % item_url
return ""
if os.path.exists(ppt_file):
return "exist"
info = self.media_content_pattern.findall(item_page);
if len(info) != 0:
media_content = info[0]
else:
media_content = ""
if media_content == "":
return
info = self.elements_content_pattern.findall(media_content);
element_tuple_list = []
for element_content in info:
if element_content.find('data-src="http://')!=-1:
element_type = "png"
else:
element_type = "text"
element_data = ""
if element_type == "png":
info = self.png_pattern.findall(element_content);
if len(info) != 0:
element_data = info[0]
if element_data.find("wx_fmt")==-1:
info = self.datatype_pattern.findall(element_content)
if len(info)>0:
element_data += "?wx_fmt=%s" % info[0]
else:
element_data = ""

else:
info = self.text_pattern.findall(element_content);
if len(info)>3:
element_data = ""
else:
element_data = " ".join(info)
if element_data:
element_tuple_list.append((element_type,element_data))

if len(element_tuple_list) > 0:
if not os.path.exists(item_path):
os.makedirs(item_path)
text_data = ""
picfile_list = []
for element_tuple in element_tuple_list:
element_type,element_data = element_tuple
if element_type == "text":
text_data += element_data
else:
if element_data:
picfile = self.download_pic(element_data,item_path)
if picfile!="":
picfile_list.append(picfile)
self.write_text_content(text_data,item_path)
self.creat_ppt(title,ppt_file,picfile_list)
return title
def download_pic(self,url,path):
ret,pic_page = request_url(url)
if ret == -1 or pic_page=="":
return ""
info = self.picid_pattern.findall(url)
if len(info)>0 and info[0]!="":
picid = info[0]
else:
picid = url.replace("/","_").replace(":","_").replace(".","_").replace("?","_")
info = self.pic_fmt_pattern.findall(url)
if len(info)>0 and info[0]!="":
fmt = info[0].split("&")[0]
fmt = fmt.split("?")[0]
else:
print "Get pic fmt failed!%s" % url
return ""
filename_bak = "../data/" + picid + "_bak.%s" % fmt

fp = open(filename_bak,"w")
fp.write(pic_page)
fp.close()
pil_image = PIL.Image.open(filename_bak)
w, h = pil_image.size
w_box = 720
h_box = 540
filename = path + "/" + picid + ".%s" % fmt
self.resize(w, h, w_box, h_box, pil_image,filename)
os.system("rm -rf %s" % filename_bak)
return filename

def resize(self,w, h, w_box, h_box, pil_image,outfile):
'''
resize a pil_image object so it will fit into
a box of size w_box times h_box, but retain aspect ratio
'''
f1 = 1.0*w_box/w # 1.0 forces float division in Python2
f2 = 1.0*h_box/h
factor = min([f1, f2])
#print(f1, f2, factor) # test
# use best down-sizing filter
width = int(w*factor)
height = int(h*factor)
out = pil_image.resize((width, height), PIL.Image.ANTIALIAS)
out.save(outfile)

def write_text_content(self,text_data,path):
filename = path + "/" + "text_data.txt"
fp = open(filename,"w")
fp.write(text_data)
fp.close()

def creat_ppt(self,title_content,ppt_file,picfile_list):
prs = Presentation("default.pptx")
title_slide_layout = prs.slide_layouts[0]
slide = prs.slides.add_slide(title_slide_layout)
title = slide.shapes.title
title.text = title_content
graph_slide_layout = prs.slide_layouts[6]
for picfile in picfile_list:
slide = prs.slides.add_slide(graph_slide_layout)
slide.shapes.add_picture(picfile,0,0)
prs.save(ppt_file)

def test_ppt():
picfile = "test.jpeg"
for i in xrange(12):
try:
prs = Presentation("default.pptx")
graph_slide_layout = prs.slide_layouts[i]
slide = prs.slides.add_slide(graph_slide_layout)
placeholder = slide.placeholders[0]
#pic = placeholder.insert_picture(picfile)
prs.save("../ppt/%s.pptx" % i)
except:
continue

def test_layout(i):
picfile = "test.jpeg"
prs = Presentation("default.pptx")
graph_slide_layout = prs.slide_layouts[i]
slide = prs.slides.add_slide(graph_slide_layout)
placeholder = slide.placeholders[1]
pic = placeholder.insert_picture(picfile)
prs.save("../ppt/%s.pptx" % i)

def test_empty_layout():
picfile = "test.jpeg"
prs = Presentation("default.pptx")
graph_slide_layout = prs.slide_layouts[6]
slide = prs.slides.add_slide(graph_slide_layout)
slide.shapes.add_picture(picfile,0,0)
prs.save("../ppt/%s.pptx" % 6)
if __name__=="__main__":
#test_empty_layout()
#test_layout(int(sys.argv[1]))
#test_ppt()

crawler = Crawler()
#crawler.get_item_list()
item_url = "http://mp.weixin.qq.com/s?__biz=MzA3NzIwMDM3OA==&amp;mid=206906414&amp;idx=1&amp;sn=484555cf9c8efd164d06f6f6d0a6c19e&amp;scene=21#wechat_redirect"
item_url = item_url.replace("&amp;","&")
crawler.get_item(item_url)
print "done!"

util.py

# !/usr/bin/env python
# encoding:UTF-8
import urllib2
def request_url(url,repeat=3):
ret = -1#失败
content = ''
for cnt in xrange(repeat):
try:
req = urllib2.Request(url);
response = urllib2.urlopen(req)
content = response.read()
response.close()
ret = 0#成功
break;
except:
continue
result = (ret,content)
return result