我有个需求就是抓取一些简单的书籍信息存储到mysql数据库，例如，封面图片，书名，类型，作者，简历，出版社，语种。
我比较之后，决定在亚马逊来实现我的需求。
我分析网站后发现，亚马逊有个高级搜索的功能，我就通过该搜索结果来获取书籍的详情URL。
由于亚马逊的高级搜索是用get方法的，所以通过分析，搜索结果的URL，可得到node参数是代表书籍类型的。field-binding_browse-bin是代表书籍装饰。
所以我固定了书籍装饰为平装，而书籍的类型，只能每次运行的时候，爬取一种类型的书籍难过
之后就是根据书籍详情页面利用正则表达式来匹配需要的信息了。
以下源代码，命名不是很规范。。。
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import requestsimport sysimport reimport pymysqlclass product: type="历史" name="" author="" desciption="" pic1="" languages="" press=""def getProUrl(): urlList = [] headers = {"User-Agent":"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36"} session = requests.Session() furl="https://www.amazon.cn/gp/search/ref=sr_adv_b/?search-alias=stripbooks&field-binding_browse-bin=2038564051&sort=relevancerank&page=" for i in range(1,7): html="" print(furl+str(i)) html = session.post(furl+str(i)+'&node=658418051',headers = headers) html.encoding = 'utf-8' s=html.text.encode('gb2312','ignore').decode('gb2312') url=r'</li><li id=".*?" data-asin="(.+?)" class="s-result-item celwidget">' reg=re.compile(url,re.M) items = reg.findall(html.text) for i in range(0,len(items)): urlList.append(items[i]) urlList=set(urlList) return urlListdef getProData(url): pro = product() headers = {"User-Agent":"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36"} session = requests.Session() zurl="https://www.amazon.cn/dp/" html = session.get(zurl+url,headers = headers) html.encoding = 'utf-8' s=html.text.encode('gb2312','ignore').decode('gb2312') pro.pic1=getProPic(html) pro.name=getProName(html) pro.author=getProAuthor(html) pro.desciption=getProDescrip(html) pro.press=getProPress(html) pro.languages=getProLanguages(html) return prodef getProPic(html): pic=r'id="imgBlkFront" data-a-dynamic-image="{"(.+?)".*?}"' reg=re.compile(pic,re.M) items = reg.findall(html.text) if len(items)==0: return "" else: return items[0]def getProName(html): name=r'<div class="ma-title"><p class="wraptext goto-top">(.+?)<span' reg=re.compile(name,re.M) items = reg.findall(html.text) if len(items)==0: return "" else: return items[0]def getProAuthor(html): author=r'<span class="author.{0,20}" data-width="".{0,30}>.*?<a class="a-link-normal" href=".*?books" rel="external nofollow" >(.+?)</a>.*?<span class="a-color-secondary">(.+?)</span>' reg=re.compile(author,re.S) items = reg.findall(html.text) au="" for i in range(0,len(items)): au=au+items[i][0]+items[i][1] return audef getProDescrip(html): Descrip=r'<noscript>.{0,30}<div>(.+?)</div>.{0,30}<em></em>.{0,30}</noscript>.{0,30}<div id="outer_postBodyPS"' reg=re.compile(Descrip,re.S) items = reg.findall(html.text) if len(items)==0: return "" else: position = items[0].find('海报：') descrip=items[0] if position != -1: descrip=items[0][0:position] return descrip.strip()def getProPress(html): press=r'<li><b>出版社:</b>(.+?)</li>' reg=re.compile(press,re.M) items = reg.findall(html.text) if len(items)==0: return "" else: return items[0].strip()def getProLanguages(html): languages=r'<li><b>语种：</b>(.+?)</li>' reg=re.compile(languages,re.M) items = reg.findall(html.text) if len(items)==0: return "" else: return items[0].strip()def getConnection(): config = { 'host':'121.**.**.**', 'port':3306, 'user':'root', 'password':'******', 'db':'home_work', 'charset':'utf8', 'cursorclass':pymysql.cursors.DictCursor, } connection = pymysql.connect(**config) return connectionurlList = getProUrl()i = 0for d in urlList: i = i + 1 print (i) connection = getConnection() pro = getProData(d) try: with connection.cursor() as cursor: sql='INSERT INTO books (type,name,author,desciption,pic1,languages,press) VALUES (%s,%s,%s,%s,%s,%s,%s)' cursor.execute(sql,(pro.type,pro.name,pro.author,pro.desciption,pro.pic1,pro.languages,pro.press)) connection.commit() finally: connection.close(); |
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原文链接：http://blog.csdn.net/tianxiazuixian/article/details/53322240
