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以一种"廉价"的方式获取页面的标题(downmoon)

有朋友问到：“我需要得到一个webpage的title，因为这个title一般都比较靠前，只要取得html的前面少量内容就可以了。因为要取得很多个页面的title,如果下载整个htmlcode，肯定比较浪费时间。.net好像没有现成的类可以干这件事情(取得部分html)，我应该如何去实现？”一种比较"廉价"(即较小成本条件下)的解决思路：第一步：取出含有页面title部分的最小集合。这是“廉价”的关键！第二步：用正则表达式取出和</title</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-29 22:21:16</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3024</span></span>  </p> </article><article class="excerpt"> <header> <a title="数据库相关" class="label label-important zj-del-target" href="/category/32">数据库相关<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/6549" title="在ContentResolver中使用Group By" target="_blank" onclick="return recordId('',)">在ContentResolver中使用Group By </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/6549" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/1.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/6549';}else{window.open('/article/6549');}" style="cursor: pointer;">使用ContentProvider查询短信，希望可以在ContentResolver.query中使用GroupBy，发现系统并没有提供接口或者可用字段。探究竟首先我们来看看query函数：publicfinalCursorquery(Uriuri,String[]projection,Stringselection,String[]selectionArgs,StringsortOrder){returnquery(uri,projection,sele</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-12 01:53:14</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3024</span></span>  </p> </article><article class="excerpt"> <header> <a title="各行各业" class="label label-important zj-del-target" href="/category/38">各行各业<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/3485" title="Vimux: simple vim and tmux integration" target="_blank" onclick="return recordId('',)">Vimux: simple vim and tmux integration </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/3485" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/16.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/3485';}else{window.open('/article/3485');}" style="cursor: pointer;">Vimux:simplevimandtmuxintegrationVimux:simplevimandtmuxintegrationbyBenMillsonApr11,2012AtBraintreewetakeourtoolsseriously.Wearealwayslookingforwaystoimproveourtoolchaintomakeusmoreproductive.Becausewepair-programfull-time,wehavea</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-12 01:33:21</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3024</span></span>  </p> </article><article class="excerpt"> <header> <a title="Linux" class="label label-important zj-del-target" href="/category/53">Linux<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/3100" title="Carla Schroder：Linux网管的十大秘诀" target="_blank" onclick="return recordId('',)">Carla Schroder：Linux网管的十大秘诀 </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/3100" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/7.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/3100';}else{window.open('/article/3100');}" style="cursor: pointer;">早在CarlaSchroder编写第一本书《LinuxCookbook》之际，她就预想将来会写一本《LinuxNetworkingCookbook》作为姐妹篇，两者就像花生奶油和巧克力一样天然浑成。以下是她为那些想成为卓越Linux网管的人们所撰写的十大秘诀——无论你目前水平如何，它们都是非常值得参考的建议。除第一条之外，不分先后：1.研究并掌握TCP/IP包、UDP数据报及ICMP消息的结构。2.理解网络连接如何建立、维持和终止的相关细节。3.抓紧时间研</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-12 01:33:11</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3024</span></span>  </p> </article><article class="excerpt"> <header> <a title="Python" class="label label-important zj-del-target" href="/category/44">Python<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/1167" title="selenium + python自动化测试环境搭建" target="_blank" onclick="return recordId('',)">selenium + python自动化测试环境搭建 </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/1167" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/14.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/1167';}else{window.open('/article/1167');}" style="cursor: pointer;">selenium是一个web的自动化测试工具，不少学习功能自动化的同学开始首选selenium，相因为它相比QTP有诸多有点：*免费，也不用再为破解QTP而大伤脑筋*小巧，对于不同的语言它只是一个包而已，而QTP需要下载安装1个多G的程序。*这也是最重要的一点，不管你以前更熟悉C、java、ruby、python、或都是C#，你都可以通过selenium完成自动化测试，而QTP只支持VBS*支持多平台：windows、linux、MAC，支持多浏览器：ie</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-12 01:32:25</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3024</span></span>  </p> </article><article class="excerpt"> <header> <a title="编程技术" class="label label-important zj-del-target" href="/category/30">编程技术<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/19721" title="出百度记" target="_blank" onclick="return recordId('',)">出百度记 </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/19721" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/10.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/19721';}else{window.open('/article/19721');}" style="cursor: pointer;">虽然是多年前的老文，但是看了后颇有感触，所以转贴个。===出百度记作者：本刊记者罗燕信息类别：科技发布时间：2006-12-518:27:54文字〖大中小〗自动滚屏（右键暂停）缔造中国最大搜索引擎的幕后角色们正纷纷拷贝、粘贴李彦宏的创业密码【抱憾ES】在百度内部，有这样一种说法：百度出来创业的人，大部分是ES部门的人。ES全称企业搜索，后改称企业软件事业部，百度曾投入巨大精力于其中，但终因市场限制未取得太大成就，导致其多数骨干出走，其中便包括程浩、林应明、</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-29 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