seaver has asked for the wisdom of the Perl Monks concerning the following question:

Dear all

I originally submitted this question here but, after some research, have come to realise that I formulated the question wrong, so am trying again

I'm simply automating a search on a citations web-page using LWP::UserAgent.

When I submit the search online, I get a full page back immediately, with some results on it, but the page is set to refresh automatically, and if I wait a couple of seconds, the page updates exactly how many results I have available (it only shows ten per page).

When I submit using UserAgent and HTTP::Request::Form I get a results page in full, but it's the initial page, which is the page waiting to refresh with ALL the results. It's weird because it's only 10 per page, and the refresh is just to tell you the full number of records found. I cannot figure out what to do about the refresh, because if I resubmit the search I get back the very same initial results page, but I don't know how to 'refresh' for the new page from UserAgent...

What I really dont understand is that I want to download ALL the records via a button, but if I only get the initial web-page, then the number of records is small, i would have thought that especially because the server itself should be continuing to find records, even if I 'press' the button, it would thereby download ALL the records the server has found, and not necessarily the ones found when the results page was first submitted.

Does this make sense?

Thanks
Sam

janitored by ybiC: Changed <a href...> nodelink to PM-style link a'la [id://392513|here] as per Monastery specification in PerlMonks FAQ

Replies are listed 'Best First'.
Re: refreshing a page/session without re-submitting search
by bpphillips (Friar) on Sep 22, 2004 at 14:49 UTC
    I would have to see the full HTML of a result page to know for sure (I can't access the url given in your other post) but the link to the .js file you gave in the other post gives me a clue.

    Something in the page triggers calling the loadTimer() method (possibly a <body onLoad="loadTime()">) which then polls the loaded variable to see if the page is finished loading. Once loaded has a true value, it then looks at the values in numHits and numPages and writes those to the page using the .innerHTML() or .innerText() methods in javascript.

    So without seeing the actual HTML of the page, I'm not sure but I'd bet there's a var numHits = x somewhere in the page (probably at the bottom).
[reply]
[d/l]
[select]
      bpphillips

      thanks for your reply, you were absolutely correct on both counts, theres an 'onLoad' in the body tag, and a numHits var at the end of the page.

      Could you explain what is happening once the page initially loads, can I simply refresh the page?

      Thanks
      Sam 

      HTTP/1.1 200 OK
Connection: close
Date: Wed, 22 Sep 2004 16:23:56 GMT
Pragma: no-cache
Server: Apache/1.3.29 (Unix) mod_perl/1.29 Perl/v5.6.1
Content-Type: text/html
Client-Date: Wed, 22 Sep 2004 16:23:59 GMT
Client-Response-Num: 1
Client-Transfer-Encoding: chunked
Content-Base: http://wos4.isiknowledge.com:80/
Link: <templates/wok3_prod.css>; rel="stylesheet"; type="text/css"
Link: <templates/prod_buttons.css>; rel="stylesheet"; type="text/css"
Title: Search Results Summary -- Web of Science 7.1

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 Azzone GF<br />
 <a href="?SID=QVGnGArh@WcAAFpkZFQ&Func=Abstract&doc=1/1" onClick="thi
+s.href=&quot;javascript:submit_page('Abstract', '1/1', '', '')&quot;;
+">The dual biological identity of human
 beings and the naturalization of morality</a>&nbsp;<br />


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   <br />&nbsp; <a href="http://wos4.isiknowledge.com:80/CIW.cgi?SID=Q
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+s.href=&quot;javascript:submit_page('Abstract', '1/3', '', '')&quot;;
+">Settlement patterns and development o
f social <B>complexity</B> in the Ylluo region, north China</a>&nbsp;<
+br />


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 Smith AT, Badalyan R, Avetisyan P, et al.<br />
 <a href="?SID=QVGnGArh@WcAAFpkZFQ&Func=Abstract&doc=1/4" onClick="thi
+s.href=&quot;javascript:submit_page('Abstract', '1/4', '', '')&quot;;
+">Early complex societies in Southern C
aucasia: A preliminary report on the 2002 investigations by Project Ar
+AGATS on the Tsakahovit Plain, Republic of Armenia</a>&nbsp;<br />


 AMERICAN JOURNAL OF ARCHAEOLOGY 108 (1): 1-41 JAN 2004
   <br />&nbsp; <a href="http://wos4.isiknowledge.com:80/CIW.cgi?SID=Q
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 5.
</td>
<td valign=top>
 Sawyer RK<br />
 <a href="?SID=QVGnGArh@WcAAFpkZFQ&Func=Abstract&doc=1/5" onClick="thi
+s.href=&quot;javascript:submit_page('Abstract', '1/5', '', '')&quot;;
+">The mechanisms of <B>emergence</B></a
>&nbsp;<br />


 PHILOSOPHY OF THE SOCIAL SCIENCES 34 (2): 260-282 JUN 2004
   <br />&nbsp; <a href="http://wos4.isiknowledge.com:80/CIW.cgi?SID=Q
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rsion%3D2%26SrcAuth%3DOpenURL%26SrcApp%3DWOS%26DestURL%3Dhttp%253A%252
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 d'Errico F, Henshilwood C, Lawson G, et al.<br />
 <a href="?SID=QVGnGArh@WcAAFpkZFQ&Func=Abstract&doc=1/6" onClick="thi
+s.href=&quot;javascript:submit_page('Abstract', '1/6', '', '')&quot;;
+">Archaeological evidence for the <B>em
ergence</B> of language, symbolism, and music - An alternative multidi
+sciplinary perspective</a>&nbsp;<br />


 JOURNAL OF WORLD PREHISTORY 17 (1): 1-70 MAR 2003
   <br />&nbsp; <a href="http://wos4.isiknowledge.com:80/CIW.cgi?SID=Q
+VGnGArh@WcAAFpkZFQ&Func=TransferToPublisher&URL=http%3A//gateway.isik
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<td valign=top>
 Williams H<br />
 <a href="?SID=QVGnGArh@WcAAFpkZFQ&Func=Abstract&doc=1/7" onClick="thi
+s.href=&quot;javascript:submit_page('Abstract', '1/7', '', '')&quot;;
+">Writing to Paris: Poets, nobles and s
avages in nineteenth-century Brittany</a>&nbsp;<br />


 FRENCH STUDIES 57 (4): 475-490 OCT 2003
   <br />&nbsp; <a href="http://wos4.isiknowledge.com:80/CIW.cgi?SID=Q
+VGnGArh@WcAAFpkZFQ&Func=TransferToPublisher&URL=http%3A//gateway.isik
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 8.
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 Hunt JG, Stelluto GE, Hooijberg R<br />
 <a href="?SID=QVGnGArh@WcAAFpkZFQ&Func=Abstract&doc=1/8" onClick="thi
+s.href=&quot;javascript:submit_page('Abstract', '1/8', '', '')&quot;;
+">Toward new-wave organization creativi
ty: Beyond romance and analogy in the relationship between orchestra-c
+onductor leadership and musician creativity</a>&nbsp;<br />


 LEADERSHIP QUARTERLY 15 (1): 145-162 FEB 2004
   <br />&nbsp; <a href="http://wos4.isiknowledge.com:80/CIW.cgi?SID=Q
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 Arnold JE, Walsh MR, Hollimon SE<br />
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+s.href=&quot;javascript:submit_page('Abstract', '1/9', '', '')&quot;;
+">The archaeology of California</a>&nbs
p;<br />


 JOURNAL OF ARCHAEOLOGICAL RESEARCH 12 (1): 1-73 MAR 2004
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+is.href=&quot;javascript:submit_page('Abstract', '1/10', '', '')&quot
+;;">An ethnoarchaeological study of fea
sting in Sulawesi, Indonesia</a>&nbsp;<br />


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+mit_page('PageNo', '1/11')&quot;;" VALU
E=2>2</A> | <A HREF="CIW.cgi?SID=QVGnGArh@WcAAFpkZFQ&Func=Summary&curd
+oc=1/21" onClick="this.href=&quot;javascript:submit_page('PageNo', '1
+/21')&quot;;" VALUE=3>3</A> | <A HREF="
CIW.cgi?SID=QVGnGArh@WcAAFpkZFQ&Func=Summary&curdoc=1/31" onClick="thi
+s.href=&quot;javascript:submit_page('PageNo', '1/31')&quot;;" VALUE=4
+>4</A> | <A HREF="CIW.cgi?SID=QVGnGArh@
WcAAFpkZFQ&Func=Summary&curdoc=1/41" onClick="this.href=&quot;javascri
+pt:submit_page('PageNo', '1/41')&quot;;" VALUE=5>5</A> | <A HREF="CIW
+.cgi?SID=QVGnGArh@WcAAFpkZFQ&Func=Summa
ry&curdoc=1/51" onClick="this.href=&quot;javascript:submit_page('PageN
+o', '1/51')&quot;;" VALUE=6>6</A> | <A HREF="CIW.cgi?SID=QVGnGArh@WcA
+AFpkZFQ&Func=Summary&curdoc=1/61" onCli
ck="this.href=&quot;javascript:submit_page('PageNo', '1/61')&quot;;" V
+ALUE=7>7</A> ]</td>
<td><input class="bnextpg" type="image" name="Next Page" alt="Next Pag
+e" title="Next Page" src="Images/nextpga.gif"  BORDER=0 VSPACE=1 HSPA
+CE=1 /></td>
<td><img class="bfrwrd10" alt="Next 10 Pages (Inactive)" title="Next 1
+0 Pages (Inactive)" src="Images/frwrd10i.gif"  BORDER=0 VSPACE=1 HSPA
+CE=1 /></td>
<td><input class="blast10" type="image" name="Last Page" alt="Last Pag
+e" title="Last Page" src="Images/last10a.gif"  BORDER=0 VSPACE=1 HSPA
+CE=1 /></td>
</tr></table>
   </td>
  </tr>
 </table>
</div>


<div class="smallV80">62 documents matched your query of the 3,182,520
+ in the data limits you selected.</div>
<hr />

</form>
<p class="copyright">
  <a href="http://wos.isitrial.com/policy/Policy.htm">Acceptable Use P
+olicy</a><br />
  Copyright &copy; 2004
  <a href="http://www.thomson.com/scientific/scientific.jsp">The Thoms
+on Corporation</a>
</p>





<script type="text/javascript" language="">
<!--
// This code at bottom of page so it executes last
void(window.setTimeout('loaded = true', 1000));
//NUMHITS VALUE
var numHits = '62';
var numPages= '7';
//-->
//jump_to_nav_top();
</script>

</body>
</html>

      [download]
[reply]
[d/l]
        the page isn't really ever refreshing so you don't need to re-request the data using LWP::Useragent. Just search through the response content for the var numHits line like: 
        my $response = LWP::UserAgent->request($request);
my $total_hits = 0;
if($response->content =~ m/var numHits = '(\d+)'/){
    $total_hits = $1;
}

        [download]
        You can do something similar to get the numPages value but you shouldn't need to re-request the page.
[reply]
[d/l]
[select]

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