http响应内容c#中的特定值
本文关键字：响应 http | 更新日期: 2023-09-27 18:01:07
我想知道如何从http响应内容中提取特定的值。比方说，我发出getAsync请求的页面会返回响应，在该响应中，我需要提取passbird的值。如何在这个getAsync方法中获取网站的密码值？
这是我的代码：
async static void DownloadPage(string url)
{
CookieContainer cookies = new CookieContainer();
HttpClientHandler handler = new HttpClientHandler();
handler.CookieContainer = cookies;
using (HttpClient client = new HttpClient(handler))
{
using (HttpResponseMessage response = client.GetAsync("https://www.kijiji.ca/t-login.html").Result)
{
HttpHeaders headers = response.Headers;
HttpContent content = response.Content;
string myContent = await content.ReadAsStringAsync();
}
}
这是我得到的回复：
<!DOCTYPE html>
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<meta property="og:country-name" content="Canada"/>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<meta name="msvalidate.01" content="E03E7C8B4B4E1A0234A8D2042FD326E8" />
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services</a>
</li>
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cars & vehicles</a>
</li>
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<input id="targetUrl" name="targetUrl" type="hidden" value="L15udS9JWHhHMURBNmdjdkFuTFJJeUR3PT0-"/><section>
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class="columnListItem--jss-0-684" data-reactid=".282hd8ogglc.0.0.0.$=13.1.4"><a class="link--jss-0-686" rel="nofollow" href="http://www.ebayclassifiedsgroup.com/brands.html" data-reactid=".282hd8ogglc.0.0.0.$=13.1.4.0">eBay Classifieds Sites</a></li></ul></div><div class="column--jss-0-681" width="20%" style="width:20%;" data-reactid=".282hd8ogglc.0.0.0.$=14"><h3 class="columnTitle--jss-0-682" data-reactid=".282hd8ogglc.0.0.0.$=14.0">Frequently Asked Questions</h3><ul class="columnList--jss-0-683" data-reactid=".282hd8ogglc.0.0.0.$=14.1"><li class="columnListItem--jss-0-684" data-reactid=".282hd8ogglc.0.0.0.$=14.1.0"><a class="link--jss-0-686" rel="nofollow" href="http://help.kijiji.ca/helpdesk/basics/benefits-of-promoting-ads" data-reactid=".282hd8ogglc.0.0.0.$=14.1.0.0">How do I get people to see my Ad?</a></li><li class="columnListItem--jss-0-684" data-reactid=".282hd8ogglc.0.0.0.$=14.1.1"><a class="link--jss-0-686" rel="nofollow" href="http://help.kijiji.ca/helpdesk/technical-issue/where-is-my-ad" data-reactid=".282hd8ogglc.0.0.0.$=14.1.1.0">Where is my Kijiji Ad? I can't find it.</a></li><li class="columnListItem--jss-0-684" data-reactid=".282hd8ogglc.0.0.0.$=14.1.2"><a class="link--jss-0-686" rel="nofollow" href="http://help.kijiji.ca/helpdesk/basics/editing-my-ad" data-reactid=".282hd8ogglc.0.0.0.$=14.1.2.0">How can I change my Ad?</a></li><li class="columnListItem--jss-0-684" data-reactid=".282hd8ogglc.0.0.0.$=14.1.3"><a class="link--jss-0-686" rel="nofollow" href="http://help.kijiji.ca/helpdesk/basics/deleting-my-ad" data-reactid=".282hd8ogglc.0.0.0.$=14.1.3.0">How do I delete my Ad?</a></li></ul></div></div></div><div id="FooterBadgeColumns" class="container--jss-0-690" data-reactid=".282hd8ogglc.0.1"><div data-reactid=".282hd8ogglc.0.1.0"><div class="column--jss-0-691 storeColumn--jss-0-695" width="20%" style="width:20%;" data-reactid=".282hd8ogglc.0.1.0.$=10"><a class="link--jss-0-692" href="https://itunes.apple.com/ca/app/kijiji-free-local-classifieds/id318979520" target="_blank" rel="nofollow" data-reactid=".282hd8ogglc.0.1.0.$=10.0"><svg class="icon--jss-0-510" width="115" height="40" aria-labelledby="title" role="img" data-reactid=".282hd8ogglc.0.1.0.$=10.0.0"><title data-reactid=".282hd8ogglc.0.1.0.$=10.0.0.0"></title><use xlink:href="#ios-app-store" data-reactid=".282hd8ogglc.0.1.0.$=10.0.0.1"></use></svg><span class="linkText--jss-0-694" data-reactid=".282hd8ogglc.0.1.0.$=10.0.1"></span></a></div><div class="column--jss-0-691 storeColumn--jss-0-695" width="20%" style="width:20%;" data-reactid=".282hd8ogglc.0.1.0.$=11"><a class="link--jss-0-692" href="https://play.google.com/store/apps/details?id=com.ebay.kijiji.ca" target="_blank" rel="nofollow" data-reactid=".282hd8ogglc.0.1.0.$=11.0"><svg class="icon--jss-0-510" width="115" height="40" aria-labelledby="title" role="img" data-reactid=".282hd8ogglc.0.1.0.$=11.0.0"><title data-reactid=".282hd8ogglc.0.1.0.$=11.0.0.0"></title><use xlink:href="#google-play" data-reactid=".282hd8ogglc.0.1.0.$=11.0.0.1"></use></svg><span class="linkText--jss-0-694" data-reactid=".282hd8ogglc.0.1.0.$=11.0.1"></span></a></div><div class="column--jss-0-691" width="20%" style="width:20%;" data-reactid=".282hd8ogglc.0.1.0.$=12"><a class="link--jss-0-692" href="http://kijijiblog.ca/" target="_blank" data-reactid=".282hd8ogglc.0.1.0.$=12.0"><svg class="icon--jss-0-510" width="40" height="40" aria-labelledby="title" role="img" data-reactid=".282hd8ogglc.0.1.0.$=12.0.0"><title data-reactid=".282hd8ogglc.0.1.0.$=12.0.0.0"></title><use xlink:href="#rss-feed" data-reactid=".282hd8ogglc.0.1.0.$=12.0.0.1"></use></svg><span class="linkText--jss-0-694" data-reactid=".282hd8ogglc.0.1.0.$=12.0.1">Visit us on our Blog</span></a></div><div class="column--jss-0-691" width="20%" style="width:20%;" data-reactid=".282hd8ogglc.0.1.0.$=13"><a class="link--jss-0-692" href="http://www.facebook.com/Kijiji.ca" target="_blank" rel="nofollow" data-reactid=".282hd8ogglc.0.1.0.$=13.0"><svg class="icon--jss-0-510" width="40" height="40" aria-labelledby="title" role="img" data-reactid=".282hd8ogglc.0.1.0.$=13.0.0"><title data-reactid=".282hd8ogglc.0.1.0.$=13.0.0.0"></title><use xlink:href="#facebook" data-reactid=".282hd8ogglc.0.1.0.$=13.0.0.1"></use></svg><span class="linkText--jss-0-694" data-reactid=".282hd8ogglc.0.1.0.$=13.0.1">Friend us on Facebook</span></a></div><div class="column--jss-0-691" width="20%" style="width:20%;" data-reactid=".282hd8ogglc.0.1.0.$=14"><a class="link--jss-0-692" href="http://www.youtube.com/kijijicanadacorp" target="_blank" rel="nofollow" data-reactid=".282hd8ogglc.0.1.0.$=14.0"><svg class="icon--jss-0-510" width="40" height="40" aria-labelledby="title" role="img" data-reactid=".282hd8ogglc.0.1.0.$=14.0.0"><title data-reactid=".282hd8ogglc.0.1.0.$=14.0.0.0"></title><use xlink:href="#youtube" data-reactid=".282hd8ogglc.0.1.0.$=14.0.0.1"></use></svg><span class="linkText--jss-0-694" data-reactid=".282hd8ogglc.0.1.0.$=14.0.1">Watch us on YouTube</span></a></div></div></div><div class="copyright--jss-0-705" data-reactid=".282hd8ogglc.0.2"><span data-reactid=".282hd8ogglc.0.2.0">Copyright © 2016 eBay International AG. 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<script type="text/javascript">if(rehydrate===undefined){var rehydrate={};}rehydrate["footer"]={componentPath:"Shared/Footer",props:{}};</script>
</div>
<div class="modal-overlay"></div>
<div id="FesLoader">
<script type="text/javascript">window.__data="['"~#iM'",['"config'",['"^0'",['"toggleHeader'",false,'"showAdmarktLink'",false,'"showSearch'",true,'"toggleResponsive'",false,'"changeLocationURL'",null,'"searchForm'",['"^0'",['"attributeMap'",['"^0'",[]],'"ll'",null,'"highlightOnly'",false,'"sortByName'",'"dateDesc'",'"adPriceType'",null,'"adIdRemoved'",null,'"maxPrice'",null,'"attributeFiltersMax'",['"^0'",[]],'"userId'",null,'"origin'",null,'"categoryName'",'"'",'"keywords'",null,'"searchView'",'"LIST'",'"urgentOnly'",false,'"cpoOnly'",false,'"gpTopAd'",false,'"locationId'",0,'"radius'",'"'",'"attributeFiltersMin'",['"^0'",[]],'"address'",'"Canada'",'"noLocation'",false,'"minPrice'",null,'"pageNumber'",1,'"categoryId'",null,'"locationPath'",'"0'",'"carproofOnly'",false]],'"adCount'",7479986,'"userLoggedIn'",false,'"language'",'"en'",'"targetUrl'",'"L3QtbG9naW4uaHRtbF5hQlNjOXlnVTkyelBsZjROYytCUXV3PT0-'"]],'"locationPicker'",['"^0'",[]],'"postAd'",['"^0'",['"helpOffsetTop'",0,'"focusedStep'",null,'"loaded'",false,'"submitting'",false,'"steps'",['"~#iL'",[]],'"isAsyncValid'",false,'"packages'",['"^0'",['"compare'",['"^1'",['"basic'",'"visibility'",'"maxVisibility'"]],'"frozen'",true,'"items'",['"^0'",['"basic'",['"^0'",['"id'",'"'",'"name'",null,'"heading'",null,'"subheading'",null,'"callout'",false,'"smallestMonthlyPrice'",0,'"showBenefits'",false,'"benefits'",['"^1'",[]]]],'"hassleFree'",['"^0'",['"id'",'"PKG_HASSLE_FREE'",'"name'",null,'"heading'",null,'"subheading'",null,'"callout'",false,'"smallestMonthlyPrice'",null,'"showBenefits'",false,'"benefits'",['"^1'",[]]]],'"visibility'",['"^0'",['"id'",'"PKG_VISIBILITY'",'"name'",null,'"heading'",null,'"subheading'",null,'"callout'",true,'"smallestMonthlyPrice'",null,'"showBenefits'",false,'"benefits'",['"^1'",[]]]],'"maxVisibility'",['"^0'",['"id'",'"PKG_MAX_VISIBILITY'",'"name'",null,'"heading'",null,'"subheading'",null,'"callout'",false,'"smallestMonthlyPrice'",null,'"showBenefits'",false,'"benefits'",['"^1'",[]]]]]],'"loaded'",false,'"selected'",null]],'"isValid'",false,'"isSyncValid'",false,'"editing'",false,'"fields'",['"^0'",['"category'",['"^0'",['"syncErrors'",['"~#iS'",[]],'"errors'",['"^2'",[]],'"hasErrors'",false,'"isAsyncValid'",true,'"isSyncValid'",true,'"isValid'",true]],'"description'",['"^0'",['"syncErrors'",['"^2'",[]],'"errors'",['"^2'",[]],'"hasErrors'",false,'"isAsyncValid'",true,'"isSyncValid'",true,'"isValid'",true]],'"postalCode'",['"^0'",['"syncErrors'",['"^2'",['"ad.validation.postalCode.postalCode'"]],'"errors'",['"^2'",['"ad.validation.postalCode.postalCode'"]],'"hasErrors'",false,'"isAsyncValid'",true,'"isSyncValid'",false,'"isValid'",false]],'"price'",['"^0'",['"syncErrors'",['"^2'",[]],'"errors'",['"^2'",[]],'"hasErrors'",false,'"isAsyncValid'",true,'"isSyncValid'",true,'"isValid'",true]],'"title'",['"^0'",['"syncErrors'",['"^2'",[]],'"errors'",['"^2'",[]],'"hasErrors'",false,'"isAsyncValid'",true,'"isSyncValid'",true,'"isValid'",true]]]],'"loading'",false,'"l1CategoryId'",null]],'"globalMessage'",null,'"suggestKeyword'",['"^0'",['"suggestions'",['"^1'",[]],'"removed'",false,'"query'",'"'",'"categoryId'",0,'"selected'",false]],'"geolocation'",['"^0'",['"locationData'",['"^1'",[]]]],'"cookies'",['"^0'",[]],'"experiments'",['"^0'",['"optimizely'",['"^0'",[]]]],'"phoneNumber'",['"^0'",['"phone'",null]],'"searchSuggest'",['"^0'",['"suggestions'",['"^1'",[]],'"removed'",false,'"query'",'"'"]],'"i18n'",['"^ '",'"get'",null,'"__version__'",1,'"data'",['"^ '",'"en-CA'",['"^ '",'"footer'",['"^ '",'"columnTitles'",['"^ '",'"information'",'"Kijiji Information'",'"support'",'"Kijiji Support'",'"autos'",'"Kijiji Autos'",'"explore'",'"Explore Kijiji'",'"faq'",'"Frequently Asked Questions'"],'"copyright'",['"^ '",'"main'",'"Copyright © 2016 eBay International AG. All rights reserved.'",'"fineprint'",'"Google, Google Play, YouTube and other marks are trademarks of Google Inc.'"],'"faqLinks'",['"^ '",'"link1'",['"^ '",'"text'",'"How do I get people to see my Ad?'",'"href'",'"http:'u002F'u002Fhelp.kijiji.ca'u002Fhelpdesk'u002Fbasics'u002Fbenefits-of-promoting-ads'"],'"link2'",['"^ '",'"^A'",'"Where is my Kijiji Ad? I can't find it.'",'"^B'",'"http:'u002F'u002Fhelp.kijiji.ca'u002Fhelpdesk'u002Ftechnical-issue'u002Fwhere-is-my-ad'"],'"link3'",['"^ '",'"^A'",'"How can I change my Ad?'",'"^B'",'"http:'u002F'u002Fhelp.kijiji.ca'u002Fhelpdesk'u002Fbasics'u00
</html>
试试这个：
HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(myContent);
var r = doc.DocumentNode.Descendants();
var htmlTextBox = doc.DocumentNode.Descendants().FirstOrDefault(x => x.Name=="input" && x.Id=="login-password");
if (htmlTextBox != null)
{
var passwordBoxHtml = htmlTextBox.OuterHtml;
}
这将在passwordBoxHtml中输出为<input id="login-password" name="password" req="req" type="password" value="" maxlength="64">。
为此，您必须使用nuget 提供的HtmlAgilityPack
更新：
如果要检索特定元素的值，则需要解析检索到的页面的内容。有很多软件包可以为您解析HTML，因此您不必手动进行解析，例如HTML Agility：http://www.nuget.org/packages/HtmlAgilityPack
如果你想手动完成，希望这能让你开始：
static void DownloadPage()
{
CookieContainer cookies = new CookieContainer();
HttpClientHandler handler = new HttpClientHandler();
handler.CookieContainer = cookies;
using (HttpClient client = new HttpClient(handler))
{
using (HttpResponseMessage response = client.GetAsync("https://www.kijiji.ca/t-login.html").Result)
{
HttpHeaders headers = response.Headers;
HttpContent content = response.Content;
string myContent = content.ReadAsStringAsync().Result;
// Find value of ASOtherLang.
// It's in this pattern:
// <input type="hidden" id="ASOtherLang" value="fr_CA"/>
Regex regex = new Regex("id='"ASOtherLang'" value='"(.*)'"");
var otherLang = regex.Match(myContent).Groups[1];
Console.WriteLine(otherLang);
}
}
}
这听起来像是您要求通过向网站发送GET请求来检索输入的密码值。这是无法完成的(除非该输入中有默认值(。
您从GET请求中得到的输入是：
<input id="login-password" name="password" req="req" type="password" value="" maxlength="64"/>
你对此无能为力，无法获得登录密码。