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ASP.NET后台代码实现XmlHttp跨域访问
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最近项目需要实现XmlHttp的POST方法到另一服务器上的页面进行数据的更新，可是IE会提出“该页正在访问其控制范围之外的信息，是否继续?”等警告信息，而在其他浏览器上直接禁止掉，GOOGLE一下原来是XmlHttp的跨域访问问题，找了很多资料，说是提供很多解决方案，可是都没有用处。
原来由于浏览器的安全限制，网络连接的跨域访问时不被允许的。我们不能在浏览器端直接使用AJAX来跨域访问资源，但是在服务器端是没有这种跨域安全限制的。所以，我们只需要让服务器端帮我们完成“跨域访问”的工作，然后直接获取服务器端“跨域访问”的结果就可以了。分享下我的解决办法，希望能有所帮助。^_^
CertCheck.aspx:
using MSXML2;
namespace CA2
{
public partial class CertCheck : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Request["resultid"] != null)
{
string s = Request["resultid"];
string[] result = s.Split('@');
Label1.Text = result[1];
System.Xml.XmlDocument xmlDoc = new System.Xml.XmlDocument();
xmlDoc.Load("VBR.xml");
System.Xml.XmlElement RegNode = xmlDoc.CreateElement("Id");
RegNode.InnerText = result[0];
xmlDoc.DocumentElement.AppendChild(RegNode);
RegNode = xmlDoc.CreateElement("Serial");
RegNode.InnerText = result[1];
xmlDoc.DocumentElement.AppendChild(RegNode);
MSXML2.XMLHTTP xh = new MSXML2.XMLHTTPClass();
xh.open("POST", "http://222.19.211.119/CAProcess.aspx", false, null, null);
xh.setRequestHeader("Content-Type", "text/xml");
xh.setRequestHeader("Content-Type", "gb2312");
xh.send(xmlDoc.InnerXml);
if (xh.readyState == 4)
{
if (xh.status == 200)
{
Label1.Text += "###" + xh.responseText;
}
}
}
}
}
}
VBR.xml:
<?xml version="1.0"?>
<root>
</root>
PS: 在xh.send()中可以直接写参数，
CertCheck.aspx:
using System.Net;
using System.IO;
namespace CA2
{
public partial class CertCheck : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Request["resultid"] != null)
{
string s = Request["resultid"];
string[] result = s.Split('@');
Label1.Text = result[1];
string param = "Id="+result[0]+"&Serial="+result[1];
byte[] bs = Encoding.ASCII.GetBytes(param);
HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create("http://222.19.211.119/CAProcess.aspx");
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
req.ContentLength = bs.Length;
Stream reqStream = req.GetRequestStream();
reqStream.Write(bs, 0, bs.Length);
reqStream.Close();
HttpWebResponse myResponse = (HttpWebResponse)req.GetResponse();
StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.GetEncoding("GB2312"));
string content = reader.ReadToEnd();
reader.Close();
myResponse.Close();
Label1.Text += "###" + content.ToString();
}
}
}
}
CAProcess.aspx
protected void Page_Load(object sender, EventArgs e)
{
int Id = int.Parse(Request.Form["Id"]);
string Serial = Request.Form["Serial"];
//
Response.Write(Id.ToString()+" "+Serial);
Response.End();
}
原来由于浏览器的安全限制，网络连接的跨域访问时不被允许的。我们不能在浏览器端直接使用AJAX来跨域访问资源，但是在服务器端是没有这种跨域安全限制的。所以，我们只需要让服务器端帮我们完成“跨域访问”的工作，然后直接获取服务器端“跨域访问”的结果就可以了。分享下我的解决办法，希望能有所帮助。^_^
CertCheck.aspx:
using MSXML2;
namespace CA2
{
public partial class CertCheck : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Request["resultid"] != null)
{
string s = Request["resultid"];
string[] result = s.Split('@');
Label1.Text = result[1];
System.Xml.XmlDocument xmlDoc = new System.Xml.XmlDocument();
xmlDoc.Load("VBR.xml");
System.Xml.XmlElement RegNode = xmlDoc.CreateElement("Id");
RegNode.InnerText = result[0];
xmlDoc.DocumentElement.AppendChild(RegNode);
RegNode = xmlDoc.CreateElement("Serial");
RegNode.InnerText = result[1];
xmlDoc.DocumentElement.AppendChild(RegNode);
MSXML2.XMLHTTP xh = new MSXML2.XMLHTTPClass();
xh.open("POST", "http://222.19.211.119/CAProcess.aspx", false, null, null);
xh.setRequestHeader("Content-Type", "text/xml");
xh.setRequestHeader("Content-Type", "gb2312");
xh.send(xmlDoc.InnerXml);
if (xh.readyState == 4)
{
if (xh.status == 200)
{
Label1.Text += "###" + xh.responseText;
}
}
}
}
}
}
VBR.xml:
<?xml version="1.0"?>
<root>
</root>
PS: 在xh.send()中可以直接写参数，
CertCheck.aspx:
using System.Net;
using System.IO;
namespace CA2
{
public partial class CertCheck : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Request["resultid"] != null)
{
string s = Request["resultid"];
string[] result = s.Split('@');
Label1.Text = result[1];
string param = "Id="+result[0]+"&Serial="+result[1];
byte[] bs = Encoding.ASCII.GetBytes(param);
HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create("http://222.19.211.119/CAProcess.aspx");
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
req.ContentLength = bs.Length;
Stream reqStream = req.GetRequestStream();
reqStream.Write(bs, 0, bs.Length);
reqStream.Close();
HttpWebResponse myResponse = (HttpWebResponse)req.GetResponse();
StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.GetEncoding("GB2312"));
string content = reader.ReadToEnd();
reader.Close();
myResponse.Close();
Label1.Text += "###" + content.ToString();
}
}
}
}
CAProcess.aspx
protected void Page_Load(object sender, EventArgs e)
{
int Id = int.Parse(Request.Form["Id"]);
string Serial = Request.Form["Serial"];
//
Response.Write(Id.ToString()+" "+Serial);
Response.End();
}