试图找出网页中的元刷新
[英]Trying to figure out meta refresh in web page
问题描述
I'm trying to programmatically extract some data from this url: 
我正在尝试以编程方式从此url提取一些数据：
http://www.treasurydirect.gov/NP/BPDLogin?application=np http://www.treasurydirect.gov/NP/BPDLogin?application=np
The issue is that it does a meta refresh back on to itself, and I'm trying to figure out what it is passing to the second request to get it to display the final page (rather than conitnually refreshing on to itself). 问题是它会重新进行元刷新，而我试图弄清楚它传递给第二个请求以使其显示最终页面（而不是不断刷新其自身）。
In order to help with the analysis, I've put the first page that peforms the refresh here: http://www.testpikefin.com/datadev/tdirect.html 为了帮助进行分析，我将执行刷新的第一页放在此处： http : //www.testpikefin.com/datadev/tdirect.html
There are a couple of javascript errors that can be ignored. 有几个JavaScript错误可以忽略。 The refresh happens after 8 seconds. 刷新将在8秒钟后发生。
Update: Apparently I'm not phrasing the question well. 更新：显然我对这个问题的措辞不好。 Let me try another way. 让我尝试另一种方式。
When you go to this link: 当您转到此链接时：
http://www.treasurydirect.gov/NP/BPDLogin?application=np http://www.treasurydirect.gov/NP/BPDLogin?application=np
The first html page that gets downloaded is this: 下载的第一个html页面是这样的：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"><!-- InstanceBegin template="\\Ntdev57\wdb_dev_web\wdbdev3\Templates\govt.dwt" codeOutsideHTMLIsLocked="false" -->
<head>
<!-- InstanceBeginEditable name="page_title" -->
<meta http-equiv="refresh" content="8; URL=http://www.treasurydirect.gov/NP/BPDLogin?application=np">
<!-- InstanceEndEditable -->
<title>Government - Debt to the Penny (Daily History Search Application)</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<link type="text/css" rel="stylesheet" media="screen" href="/css/global_null.css" />
<link type="text/css" rel="stylesheet" media="screen" href="/css/govt_screen.css" />
<link type="text/css" rel="stylesheet" media="print" href="/css/govt_print.css" />
<link type="text/css" rel="stylesheet" media="all" href="/css/global_fontsize76.css" title="76" />
<link type="text/css" rel="alternate stylesheet" media="all" href="/css/global_fontsize66.css" title="66" />
<link type="text/css" rel="alternate stylesheet" media="all" href="/css/global_fontsize86.css" title="86" />
<link type="text/css" rel="alternate stylesheet" media="all" href="/css/global_fontsize96.css" title="96" />
<script type="text/javascript" src="/js/textresize.js"></script>
<script type="text/javascript" src="/js/triggerParams.js"></script>
<script type="text/javascript" src="/js/stdLauncher.js"></script>
<script type="text/javascript"> Poll();</script>
</head>
<body id="instit">
<div id="container">
<!-- BEGIN HEADER -->
<div id="header">
<!-- BEGIN LOGO -->
<div id="logo">
<a href="/tdhome.htm"><img src="/images/td_logo.gif" width="232" height="50" alt="TreasuryDirect Logo" /></a>
</div>
<!-- END LOGO -->
<!-- BEGIN TYPE NAVIGATION -->
<div id="typenav">
<ul id="investortype">
<li>You are in:</li>
<li><a href="/indiv/indiv.htm">Individual</a></li>
<li> | </li>
<li><a href="/RT/RTGateway?page=institHome">Institutional</a></li>
<li> | </li>
<li><strong>> Government</strong></li>
</ul>
</div>
<!-- END TYPE NAVIGATION -->
<!-- BEGIN SEARCH BOX -->
<div id="searchbox">
<!-- <form id="gs" method="get" action="http://search.treas.gov/search">
<fieldset>
<label for="q">Search: </label>
<input type="text" name="q" id="q" size="25" maxlength="256" value="" />
<input name="btnG" value="Search" class="button" type="image" src="/images/go.gif" alt="Go" />
<input type="hidden" name="sort" value="date:D:L:d1" />
<input type="hidden" name="output" value="xml_no_dtd" />
<input type="hidden" name="ie" value="UTF-8" />
<input type="hidden" name="oe" value="UTF-8" />
<input type="hidden" name="client" value="BPD-treasurydirect" />
<input type="hidden" name="proxystylesheet" value="BPD-treasurydirect" />
<input type="hidden" name="site" value="BPD-treasurydirect" />
</fieldset>
</form> -->
</div>
<!-- END SEARCH BOX -->
<!-- BEGIN UTILITY NAVIGATION -->
<div id="utilitynav">
<ul>
<li><a href="/maillist/maillist.htm">Mailing Lists</a></li>
<li> | </li>
<li><a href="/news/news.htm">News</a></li>
<li> | </li>
<li><a href="/about.htm">About</a></li>
<li> | </li>
<li><a href="/sitemap.htm">Sitemap</a></li>
<li> | </li>
<li><a href="/email.htm">Contact Us</a></li>
</ul>
</div>
<!-- END UTILITY NAVIGATION -->
</div>
<!-- END HEADER -->
<!-- BEGIN PERSISTENT NAVIGATION -->
<div id="persistentnav">
<ul>
<li class="doubleline"><a class="nonactive" href="/govt/apps/apps.htm">Applications & Programs</a></li>
<li class="singleline"><a class="active" href="/govt/reports/reports.htm">Reports</a></li>
<li class="singleline"><a class="nonactive" href="/govt/rates/rates.htm">Interest Rate Data</a></li>
<li class="singleline"><a class="nonactive" href="/govt/charts/charts.htm">Charts & Analysis</a></li>
<li class="singleline"><a class="nonactive" href="/govt/resources/resources.htm">Resources</a></li>
</ul>
</div>
<!-- END PERSISTENT NAVIGATION -->
<div id="contentwrap">
<!-- BEGIN BREADCRUMBNAV -->
<div id="breadcrumbnav">
<ul id="breadcrumb">
<li><a href="http://www.treasurydirect.gov">Home</a></li>
<li>›</li>
<li><a href="/govt/govt.htm">Government</a></li>
<li>›</li>
<li><a href="/govt/reports/reports.htm">Reports</a></li>
<li>›</li>
<li><a href="/govt/reports/pd/pd.htm">Public Debt Reports</a></li>
<li>›</li>
<li>Debt to the Penny (Daily History Search Application)</li>
</ul>
</div>
<!-- END BREADCRUMBNAV -->
<!-- BEGIN LOCALNAV -->
<div id="localnav">
<h1>REPORTS</h1>
<div id="verticalline">
<ul>
<li class="closed"><a href="/govt/reports/fip/fip.htm">Federal Investments Program</a></li>
<li class="openlast"><a href="/govt/reports/pd/pd.htm" class="active">Public Debt Reports</a>
<div class="subindent"><a href="/govt/reports/pd/pd_accountrpt.htm">Accountability Report</a></div>
<div class="subindent"><a href="/govt/reports/pd/pd_bearregsec.pdf">Bearer and Registered Securities (PDF)</a></div>
<div class="subindent"><a href="/govt/reports/pd/pd_debtposactrpt.htm">Debt Position and Activity Report</a></div>
<div class="subindent"><a href="/NP/BPDLogin?application=np" class="active">Debt to the Penny (Daily History / Search)</a></div>
<div class="subindent"><a href="/govt/reports/pd/feddebt/feddebt.htm">Schedules of Federal Debt</a></div>
<div class="subindent"><a href="/govt/reports/pd/pd_tror.pdf">TROR (PDF)</a></div>
</li>
</ul>
</div>
<!-- BEGIN ACCOUNT CENTER -->
<div id="login">
<h2>ACCOUNT CENTER</h2>
<h3>Log in now</h3>
<ul>
<li><a href="/GA-SZ/BPDLogin?application=GA-SZ">SLGSafe<sup>®</sup></a></li>
<li><a href="/FD/FedInvestGateway">FedInvest<sup>®</sup></a></li>
</ul>
<ul id="openacct">
<li><a href="/govt/govt_acctsetup.htm">Set up an account</a></li>
</ul>
</div>
<!-- END ACCOUNT CENTER -->
<noscript>
<div id="acsialert"><p><img src="/images/alertmessage.gif" width="16" height="16" alt="Exclamation Point" />We're pleased to hear from our customers regarding their satisfaction with our website. Although your browser settings don't allow you to view the website survey we're conducting, please <a href="mailto:oadmin@bpd.treas.gov">e-mail</a> your comments.</p></div>
</noscript>
</div>
<!-- END LOCALNAV -->
<!-- BEGIN CONTENT -->
<div id="content">
<h1>Debt to the Penny (Daily History Search Application)</h1>
<!-- InstanceBeginEditable name="content" -->
<p>You can't bookmark a Debt to the Penny daily history search. However, you can bookmark the Debt to the Penny page, at <a href="/NP/BPDLogin?application=np">http://www.treasurydirect.gov/NP/BPDLogin?application=np</a></p>
<p>For your convenience, this page will redirect to this URL in 8 seconds or less.</p>
<!-- InstanceEndEditable --> </div>
<!-- END CONTENT -->
<!-- BEGIN SUBLOCALNAV -->
<div id="right">
<!-- BEGIN TEXT SIZE -->
<div id="textsize">
<script type="text/javascript">
<!--
//alert("here 2");
var size = GetTextSize();
document.write("<p>");
if (size == 66) {
document.write(" Text Size ");
document.write("<a href=\"#\" onclick=\"IncreaseTextSize(size);\">[+]<\/a>");
}
else if (size == 86) {
document.write("<a href=\"#\" onclick=\"DecreaseTextSize(size);\">[–]<\/a>");
document.write(" Text Size ");
document.write("<a href=\"#\" onclick=\"IncreaseTextSize(size);\">[+]<\/a>");
}
else if (size == 96) {
document.write("<a href=\"#\" onclick=\"DecreaseTextSize(size);\">[–]<\/a>");
document.write(" Text Size ");
}
else {
document.write("<a href=\"#\" onclick=\"DecreaseTextSize(size);\">[–]<\/a>");
document.write(" Text Size ");
document.write("<a href=\"#\" onclick=\"IncreaseTextSize(size);\">[+]<\/a>");
}
document.write("<\/p>");
-->
</script>
<noscript>
<p> </p>
</noscript>
</div>
<!-- END TEXT SIZE -->
<img src="/images/govt/relatedlinks.gif" width="170" height="20" alt="Related Links" />
<ul class="relatedlinks">
<li><a href="/govt/rates/pd/avg/avg.htm">Average Interest Rates</a></li>
<li><a href="/govt/charts/principal/principal.htm">Principal/Interest Graphs</a></li>
<li><a href="/govt/resources/faq/faq_publicdebt.htm">FAQ</a></li>
</ul>
</div>
<!-- END SUBLOCALNAV -->
</div>
<!-- BEGIN FOOTER -->
<div id="footer">
<ul>
<li><a href="/foia.htm">Freedom of Information Act</a></li>
<li>|</li>
<li><a href="/law_and_guidance.htm">Law & Guidance</a></li>
<li>|</li>
<li><a href="/privacy.htm">Privacy & Legal Notices</a></li>
<li>|</li>
<li><a href="/terms.htm">Website Terms & Conditions</a></li>
<li>|</li>
<li><a href="/accessibility.htm">Accessibility</a></li>
<li>|</li>
<li><a href="/data_quality.htm">Data Quality</a></li>
</ul>
<p><a href="http://www.publicdebt.treas.gov/">U.S. Department of the Treasury, Bureau of the Public Debt</a></p>
<p><em>Last Updated May 31, 2007</em></p>
</div>
<!-- END FOOTER -->
</div>
</body>
<!-- InstanceEnd --></html>
The page then refreshes back onto itself and generates this (different) html: 然后页面刷新回到自身并生成此（不同的）html：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head>
<title>Debt to the Penny (Daily History Search Application)</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /><link type="text/css" rel="stylesheet" media="screen" href="/css/gw_td_null.css" /><style type="text/css" media="screen">@import "/css/gw_govt_screen.css"; </style><style type="text/css" media="print">@import "/css/gw_govt_print.css"; </style><link type="text/css" rel="stylesheet" media="all" href="/css/gw_td_fontsize76.css" title="76" /><link rel="alternate" type="application/rss+xml" title="Treasury Offering Announcements" href="/RI/TreasuryOfferingAnnouncements.rss"/><link rel="alternate" type="application/rss+xml" title="Treasury Auction Results" href="/RI/TreasuryAuctionResults.rss"/><link rel="alternate" type="application/rss+xml" title="Monthly Statement of the Public Debt" href="/rss/mspd.xml"/><link rel="alternate" type="application/rss+xml" title="Savings Bonds Pro Updates" href="/rss/sbpro.xml"/><link rel="alternate" type="application/rss+xml" title="Savings Bonds Wizard Updates" href="/rss/wizard.xml"/>
</head>
<body>
<div id="container"><!-- BEGIN HEADER --><div id="header"><!-- BEGIN LOGO --><div id="logo"><a href="/tdhome.htm"><img src="/images/gw/td_logo.gif" width="232" height="50" alt="TreasuryDirect Logo" /></a></div><!-- END LOGO --><!-- BEGIN TYPE NAVIGATION --><div id="typenav"><ul id="investortype"><li>You are in:</li><li><a href="/indiv/indiv.htm">Individual</a></li><li> | </li><li><a href="/RT/RTGateway?page=institHome">Institutional</a></li><li> | </li><li><strong>> Government</strong></li></ul></div><!-- END TYPE NAVIGATION --><!-- BEGIN SEARCH BOX --><div id="searchbox"><form id="gs" method="get" action="http://search.treas.gov/search"><fieldset><label for="q">Search: </label><input type="text" name="q" id="q" size="25" maxlength="256" value="" /><input name="btnG" value="Search" class="button" type="image" src="/images/gw/go.gif" alt="Go" /><input type="hidden" name="sort" value="date:D:L:d1" /><input type="hidden" name="output" value="xml_no_dtd" /><input type="hidden" name="ie" value="UTF-8" /><input type="hidden" name="oe" value="UTF-8" /><input type="hidden" name="client" value="BPD-treasurydirect" /><input type="hidden" name="proxystylesheet" value="BPD-treasurydirect" /><input type="hidden" name="site" value="BPD-treasurydirect" /></fieldset></form></div><!-- END SEARCH BOX --><!-- BEGIN UTILITY NAVIGATION --><div id="utilitynav"><ul><li><a href="/maillist/maillist.htm">Mailing Lists</a></li><li> | </li><li><a href="/news/news.htm">News</a></li><li> | </li><li><a href="/about.htm">About</a></li><li> | </li><li><a href="/sitemap.htm">Sitemap</a></li><li> | </li><li><a href="/email.htm">Contact Us</a></li></ul></div><!-- END UTILITY NAVIGATION --></div><!-- END HEADER -->
<!-- BEGIN PERSISTENT NAVIGATION --><div id="persistentnav"><ul><li class="doubleline"><a class="nonactive" href="/govt/apps/apps.htm">Applications & Programs</a></li><li class="singleline"><a class="active" href="/govt/reports/reports.htm">Reports</a></li><li class="doubleline"><a class="nonactive" href="/govt/rates/rates.htm">Interest Rates<br />& Prices</a></li><li class="singleline"><a class="nonactive" href="/govt/charts/charts.htm">Charts & Analysis</a></li><li class="singleline"><a class="nonactive" href="/govt/resources/resources.htm">Resources</a></li></ul></div><!-- END PERSISTENT NAVIGATION --><div id="contentwrap">
<!-- BEGIN BREADCRUMBNAV --><div id="breadcrumbnav"><ul id="breadcrumb"><li><a href="http://www.treasurydirect.gov">Home</a></li><li>›</li><li><a href="/govt/govt.htm">Government</a></li><li>›</li><li><a href="/govt/reports/reports.htm">Reports</a></li><li>›</li><li><a href="/govt/reports/pd/pd.htm">Public Debt Reports</a></li><li>›</li><li>Debt to the Penny</li></ul></div><!-- END BREADCRUMBNAV -->
<!-- BEGIN LOCALNAV --><div id="localnav"><h1>REPORTS</h1><div id="verticalline"><ul><li class="closed"><a href="/govt/reports/fip/fip.htm">Federal Investments Program</a></li><li class="closed"><a href="/govt/reports/slgs/slgs.htm">SLGS</a></li><li class="closed"><a href="/govt/reports/tfmp/tfmp.htm">Trust Funds Program</a></li><li class="closed"><a href="/govt/reports/tbp/tbp.htm">Treasury's Borrowings Program</a></li><li class="closed"><a href="/govt/reports/ir/ir.htm">Interest Reports</a></li><li class="openlast"><a href="/govt/reports/pd/pd.htm" class="active">Public Debt</a><div class="subindent"><a href="/govt/reports/pd/pd_accountrpt.htm">Accountability Report</a></div><div class="subindent"><a href="/govt/reports/pd/pd_bearregsec.pdf">Bearer and Registered Securities</a></div><div class="subindent"><a href="/govt/reports/pd/pd_debtposactrpt.htm">Debt Position and Activity Report</a></div><div class="subindent2"><a href="/NP/BPDLogin?application=np" class="active">Debt to the Penny (Daily History / Search)</a></div><div class="subindent"><a href="/exit.htm?http://fms.treas.gov/dts/index.html">DTS</a></div><div class="subindent"><a href="/govt/reports/pd/mspd/mspd.htm">MSPD</a></div><div class="subindent"><a href="/govt/reports/pd/gift/gift.htm">Gifts</a></div><div class="subindent"><a href="/govt/reports/pd/histdebt/histdebt.htm">Historical Debt Outstanding</a></div><div class="subindent"><a href="/govt/reports/pd/pd_pdotables_downloadable_files.htm">PDO</a></div><div class="subindent"><a href="/govt/reports/pd/pd_sbntables_downloadable_files.htm">SBN</a></div><div class="subindent"><a href="/govt/reports/pd/feddebt/feddebt.htm">Schedules of Federal Debt</a></div><div class="subindent"><a href="/govt/reports/pd/pd_tror.htm">TROR</a></div></li></ul></div><!-- BEGIN ACCOUNT CENTER --><div id="login"><h2>ACCOUNT CENTER</h2><h3>Log in now</h3><ul><li><a href="/SZ/BPDLogin?application=spss">SLGSafe<sup>®</sup></a></li><li><a href="/FD/FedInvestGateway.htm">FedInvest<sup>®</sup></a></li></ul><ul id="openacct"><li><a href="/govt/govt_acctsetup.htm">Set up an account</a></li></ul></div><!-- END ACCOUNT CENTER --></div><!-- END LOCALNAV -->
<!-- BEGIN CONTENT -->
<div id="content">
<form method="post" action="NPGateway">
<!--<%errormsg%>-->
<h1>The Debt to the Penny and Who Holds It</h1>
<p class="subhead">( <a href="/govt/resources/faq/faq_publicdebt.htm#DebtOwner">Debt Held by the Public</a> vs. <a href="/govt/resources/faq/faq_publicdebt.htm#DebtOwner">Intragovernmental Holdings</a> )</p>
<table class="data1">
<tr>
<th>Current</th>
<th>Debt Held by the Public</th>
<th>Intragovernmental Holdings</th>
<th>Total Public Debt Outstanding</th>
</tr>
<tr><td>05/09/2011</td><td align="right">9,681,179,453,898.66</td><td align="right">4,644,605,091,889.65</td><td align="right">14,325,784,545,788.31</td></tr>
</table>
<p>See information on the <a href="/govt/govt.htm">Debt Subject to the Limit</a>.</p>
<h2>Daily History Search Application</h2>
<p>To find the total public debt outstanding on a specific day or days, simply select a single date or date range and click on the 'Find History' button.</p>
<p>The data on total public debt outstanding is available daily from 01/04/1993 through 05/09/2011. The debt held by the public versus intragovernmental holdings data is available:</p>
<ul>
<li>Yearly (on a fiscal basis) from 09/30/1997 through 05/09/2011. </li>
<li>Monthly from 09/30/01 through 03/31/05</li>
<li>Daily from 03/31/05 through 05/09/2011</li>
</ul>
<br />
<fieldset>
<div class="columnwrap3">
<div class="column">
<table class="data3">
<tr>
<th colspan="3">Enter Beginning Date</th>
</tr>
<tr>
<th class="cat"><label for="begMonth">Month</label></th>
<th class="cat"><label for="begDay">Day</label></th>
<th class="cat"><label for="begYear">Year</label></th>
</tr>
<tr>
<td>
<select name="begMonth">
<option></option>
<option value="01">January</option>
<option value="02">February</option>
<option value="03">March</option>
<option value="04">April</option>
<option value="05">May</option>
<option value="06">June</option>
<option value="07">July</option>
<option value="08">August</option>
<option value="09">September</option>
<option value="10">October</option>
<option value="11">November</option>
<option value="12">December</option>
</select></td>
<td><select name="begDay">
<option></option>
<option value="01">1</option>
<option value="02">2</option>
<option value="03">3</option>
<option value="04">4</option>
<option value="05">5</option>
<option value="06">6</option>
<option value="07">7</option>
<option value="08">8</option>
<option value="09">9</option>
<option value="10">10</option>
<option value="11">11</option>
<option value="12">12</option>
<option value="13">13</option>
<option value="14">14</option>
<option value="15">15</option>
<option value="16">16</option>
<option value="17">17</option>
<option value="18">18</option>
<option value="19">19</option>
<option value="20">20</option>
<option value="21">21</option>
<option value="22">22</option>
<option value="23">23</option>
<option value="24">24</option>
<option value="25">25</option>
<option value="26">26</option>
<option value="27">27</option>
<option value="28">28</option>
<option value="29">29</option>
<option value="30">30</option>
<option value="31">31</option>
</select></td>
<td><select name="begYear">
<option></option>
<option value="1993">1993</option>
<option value="1994">1994</option>
<option value="1995">1995</option>
<option value="1996">1996</option>
<option value="1997">1997</option>
<option value="1998">1998</option>
<option value="1999">1999</option>
<option value="2000">2000</option>
<option value="2001">2001</option>
<option value="2002">2002</option>
<option value="2003">2003</option>
<option value="2004">2004</option>
<option value="2005">2005</option>
<option value="2006">2006</option>
<option value="2007">2007</option>
<option value="2008">2008</option>
<option value="2009">2009</option>
<option value="2010">2010</option>
<option value="2011">2011</option>
</select></td>
</tr>
</table>
</div>
<div class="column">
<table class="data3">
<tr>
<th colspan="3">Enter Ending Date (optional)</th>
</tr>
<tr>
<th class="cat"><label for="endMonth">Month</label></th>
<th class="cat"><label for="endDay">Day</label></th>
<th class="cat"><label for="endYear">Year</label></th>
</tr>
<tr>
<td><select name="endMonth">
<option></option>
<option value="01">January</option>
<option value="02">February</option>
<option value="03">March</option>
<option value="04">April</option>
<option value="05">May</option>
<option value="06">June</option>
<option value="07">July</option>
<option value="08">August</option>
<option value="09">September</option>
<option value="10">October</option>
<option value="11">November</option>
<option value="12">December</option>
</select></td>
<td><select name="endDay">
<option></option>
<option value="01">1</option>
<option value="02">2</option>
<option value="03">3</option>
<option value="04">4</option>
<option value="05">5</option>
<option value="06">6</option>
<option value="07">7</option>
<option value="08">8</option>
<option value="09">9</option>
<option value="10">10</option>
<option value="11">11</option>
<option value="12">12</option>
<option value="13">13</option>
<option value="14">14</option>
<option value="15">15</option>
<option value="16">16</option>
<option value="17">17</option>
<option value="18">18</option>
<option value="19">19</option>
<option value="20">20</option>
<option value="21">21</option>
<option value="22">22</option>
<option value="23">23</option>
<option value="24">24</option>
<option value="25">25</option>
<option value="26">26</option>
<option value="27">27</option>
<option value="28">28</option>
<option value="29">29</option>
<option value="30">30</option>
<option value="31">31</option>
</select></td>
<td><select name="endYear">
<option></option>
<option value="1993">1993</option>
<option value="1994">1994</option>
<option value="1995">1995</option>
<option value="1996">1996</option>
<option value="1997">1997</option>
<option value="1998">1998</option>
<option value="1999">1999</option>
<option value="2000">2000</option>
<option value="2001">2001</option>
<option value="2002">2002</option>
<option value="2003">2003</option>
<option value="2004">2004</option>
<option value="2005">2005</option>
<option value="2006">2006</option>
<option value="2007">2007</option>
<option value="2008">2008</option>
<option value="2009">2009</option>
<option value="2010">2010</option>
<option value="2011">2011</option>
</select></td>
</tr>
</table>
</div>
</div>
<div class="buttons"><input type="submit" name="SubmitDebtToPennySearchPage.x" value="Find History" class="action" /></div>
<!-- HIDDEN VALUES -->
<input type="hidden" name="processID" value="1305140395222" />
<input type="hidden" name="primary" value="false" />
<input type="hidden" name="transform" value="true" />
<input type="hidden" name="transformType" value="ImageButton" />
<!-- HIDDEN VALUES -->
</fieldset>
</form>
</div>
<!-- END CONTENT -->
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2 个解决方案
解决方案1
0 2011-05-11 18:40:00
查看页面源，就在这里：
<meta http-equiv="refresh" content="8; URL=http://www.treasurydirect.gov/NP/BPDLogin?application=np">
解决方案2
0 已采纳 2011-05-11 19:28:02
The first HTTP response sets a cookie with a session id. 第一个HTTP响应设置一个带有会话ID的cookie。 The refresh probably acts on that cookie, knowing that it's now set. 知道它已设置，刷新可能会作用于该cookie。
If you're writing a script to scrape the site you should be able to store and send any cookies that get set. 如果您要编写脚本来抓取网站，则应该可以存储和发送所有已设置的cookie。 I know that PHP / cURL can do it. 我知道PHP / cURL可以做到。
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