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[ASP.net教程]【基础】Html跨域跳转问题整理


今天遇到一个问题,是有关 跨域跳转问题,涉及到知识比较基础。

具体问题是:

 A站点的 PageA (Post数据)到 B站点的 PageB,PageB接受到后Redirect到B站的 PageC; 那么,当前浏览器中的PageA页面 会被Redirect到PageC 吗? 
 
测试了一下几种情况:
1.普通ajax:
类似以下这种ajax,答案是否定的
$(function(){  $('#send').click(function(){     $.ajax({       type: "GET",       url: "http://localhost:PageB/", 
data: {username:$("#username").val(), content:$("#content").val()}, dataType: "json", success: function(data){ $('#resText').empty(); //清空resText里面的所有内容 var html = ''; $.each(data, function(commentIndex, comment){ html += '<div ><h6>' + comment['username'] + ':</h6><p ' + comment['content'] + '</p></div>'; }); $('#resText').html(html); } }); }); });

 

2.通过Request模拟Post提交

类似以下这种后台模拟Request,答案是否定的

public string HttpPost(string Url, string postDataStr, HttpForType hft) {      SetAllowUnsafeHeaderParsing20(true);      HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);       request.Method = "POST";      request.ContentType = "application/x-www-form-urlencoded";      request.CookieContainer = cookie; //cookie信息由CookieContainer自行维护      var sss11 = GetAllCookies(cookie);             request.UserAgent = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)";      Stream myRequestStream = request.GetRequestStream();      StreamWriter myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312"));      myStreamWriter.Write(postDataStr);      myStreamWriter.Close();      HttpWebResponse response = null;      try {        SetCertificatePolicy();        response = (HttpWebResponse)request.GetResponse();      } catch (System.Exception ex) {        return ex.Message.ToString();      }      //获取重定向地址      //string url1 = response.Headers["Location"];      if (response != null) {        var sss22 = GetAllCookies(cookie);        Stream myResponseStream = response.GetResponseStream();        StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));        string retString = myStreamReader.ReadToEnd();        myStreamReader.Close();        myResponseStream.Close();
string retString = response.GetResponseHeader("Location"); return retString; } else { return "error"; //post请求返回为空 } }

 

3.拼凑form表单形式Post提交  

类似以下这种ajax,答案是肯定的,可以直接从 A页面 跳转到C页面(调试发现:B页面跳转C页面是在B页面后台处理的,处理完返回302跳转码和新地址到浏览器,302的新地址,header的location属性值就是C页面地址)

 

或者在A页面插入类似以下表单形式,答案也是可以跳转到C页面:

 <form action="http://localhost:PageB/" method="post">    <input id="name" name="name" value="123"/>

 


 

以上是讨论的Post跨域跳转问题。