标签:style blog http io ar os sp div on
一、演绎自已的北爱
踏上北漂的航班,开始演奏了我自已的北京爱情故事
二、爬虫1
1、网络爬虫的思路
首先:指定一个url,然后打开这个url地址,读其中的内容。
其次:从读取的内容中过滤关键字;这一步是关键,可以通过查看源代码的方式获取。
最后:下载获取的html的url地址,或者图片的url地址保存到本地
2、针对指定的url来网络爬虫
分析:
第一步:大约共有4300个下一页。
第二步:一个页面上有10个个人头像
第三步:一个头像内大约有100张左右的个人图片
指定的淘宝mm的url为:http://mm.taobao.com/json/request_top_list.htm?type=0&page=1
这个页面默认是没有下一页按钮的,我们可以通过修改其url地址来进行查看下一个页面
最后一页的url地址和页面展示如下图所示:
点击任意一个头像来进入个人的主页,如下图
3、定制的脚本
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#!/usr/bin/env python #coding:utf-8 #Author:Allentuns #Email:zhengyansheng@hytyi.com import urllib import os import sys import time ahref = ‘<a href="‘ ahrefs = ‘<a href="h‘ ahtml = ".htm" atitle = "<img style" ajpg = ".jpg" btitle = ‘<img src="‘ page = 0 while page < 4300: #这个地方可以修改;最大值为4300,我测试的时候写的是3. mmurl = "http://mm.taobao.com/json/request_top_list.htm?type=0&page=%d" %(page) content = urllib.urlopen(mmurl). read () href = content. find (ahref) html = content. find (ahtml) url = content[href + len(ahref) : html + len(ahtml)] print url imgtitle = content. find (btitle,html) imgjpg = content. find (ajpg,imgtitle) littleimgurl = content[imgtitle + len(btitle): imgjpg + len(ajpg)] print littleimgurl urllib.urlretrieve(littleimgurl, "/www/src/temp/image/taobaomm/allentuns.jpg" ) s = 0 while s < 18: href = content. find (ahrefs,html) html = content. find (ahtml,href) url = content[href + len(ahref): html + len(ajpg)] print s,url imgtitle = content. find (btitle,html) imgjpg = content. find (ajpg,imgtitle) littleimgurl = content[imgtitle : imgjpg + len(ajpg)] littlesrc = littleimgurl. find ( "src" ) tureimgurl = littleimgurl[littlesrc + 5:] print s,tureimgurl if url. find ( "photo" ) == -1: content01 = urllib.urlopen(url). read () imgtitle = content01. find (atitle) imgjpg = content01. find (ajpg,imgtitle) littleimgurl = content01[imgtitle : imgjpg + len(ajpg)] littlesrc = littleimgurl. find ( "src" ) tureimgurl = littleimgurl[littlesrc + 5:] print tureimgurl imgcount = content01.count(atitle) i = 20 try: while i < imgcount: content01 = urllib.urlopen(url). read () imgtitle = content01. find (atitle,imgjpg) imgjpg = content01. find (ajpg,imgtitle) littleimgurl = content01[imgtitle : imgjpg + len(ajpg)] littlesrc = littleimgurl. find ( "src" ) tureimgurl = littleimgurl[littlesrc + 5:] print i,tureimgurl time . sleep (1) if tureimgurl.count( "<" ) == 0: imgname = tureimgurl[tureimgurl.index( "T" ):] urllib.urlretrieve(tureimgurl, "/www/src/temp/image/taobaomm/%s-%s" %(page,imgname)) else : pass i += 1 except IOError: print ‘/nWhy did you do an EOF on me?‘ break except: print ‘/nSome error/exception occurred.‘ s += 1 else : print "---------------{< 20;1 page hava 10 htm and pic }-------------------------}" page = page + 1 print "****************%s page*******************************" %(page) else : print "Download Finshed." |
4、图片展示(部分图片)
5、查看下载的图片数量
二、爬虫2
1、首先来分析url
第一步:总共有7个页面;
第二步:每个页面有20篇文章
第三步:查看后总共有317篇文章
2、python脚本
脚本的功能:通过给定的url来将这片博客里面的所有文章下载到本地
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#!/usr/bin/env python #coding: utf-8 import urllib import time list00 = [] i = j = 0 page = 1 while page < 8: str = "http://blog.sina.com.cn/s/articlelist_1191258123_0_%d.html" %(page) content = urllib.urlopen(str). read () title = content. find (r "<a title" ) href = content. find (r "href=" ,title) html = content. find (r ".html" ,href) url = content[href + 6:html + 5] urlfilename = url[-26:] list00.append(url) print i, url while title != -1 and href != -1 and html != -1 and i < 350: title = content. find (r "<a title" ,html) href = content. find (r "href=" ,title) html = content. find (r ".html" ,href) url = content[href + 6:html + 5] urlfilename = url[-26:] list00.append(url) i = i + 1 print i, url else : print "Link address Finshed." print "This is %s page" %(page) page = page + 1 else : print "spage=" ,list00[50] print list00[:51] print list00.count( "" ) print "All links address Finshed." x = list00.count( ‘‘ ) a = 0 while a < x: y1 = list00.index( ‘‘ ) list00.pop(y1) print a a = a + 1 print list00.count( ‘‘ ) listcount = len(list00) while j < listcount: content = urllib.urlopen(list00[j]). read () open (r "/tmp/hanhan/" +list00[j][-26:], ‘a+‘ ).write(content) print "%2s is finshed." %(j) j = j + 1 #time.sleep(1) else : print "Write to file End." |
3、下载文章后的截图
4、从linux下载到windows本地,然后打开查看;如下截图
标签:style blog http io ar os sp div on
原文地址:http://www.cnblogs.com/dyllove98/p/4093549.html