客户端代码如下:
<script language="vbscript">
Set objHTTP = CreateObject("MSXML2.XMLHTTP")
Set xmlDOC =CreateObject("MSXML.DOMDocument")
strWebserviceURL = "http://localhost/possible/Service1.asmx/add"
'设置参数及其值
strRequest = "x=2&y=3"
objHTTP.Open "POST", strWebserviceURL, False
'设置这个Content-Type很重要
objHTTP.SetRequestHeader "Content-Type", "application/x-www-form-urlencoded"
objHTTP.Send(strRequest)
bOK = xmlDOC.load(objHTTP.responseXML)
'看看状态值
msgBox objHTTP.Status
msgbox objHTTP.StatusText
'objHTTP.Status=200,这里就可以处理返回的xml片段了
'如果需要,可以替换返回的xml字符串当中的<和>
xmlStr = xmlDOC.xml
xmlStr = Replace(xmlStr,"<","<",1,-1,1)
xmlStr = Replace(xmlStr,">",">",1,-1,1)
msgbox xmlStr
</script>
改为服务器端的asp代码为:
<%
Set objHTTP = Server.CreateObject("MSXML2.XMLHTTP")
Set xmlDOC =Server.CreateObject("MSXML.DOMDocument")
strWebserviceURL = "http://localhost/possible/Service1.asmx/add"
'设置参数及其值
strRequest = "x=2&y=3"
objHTTP.Open "POST", strWebserviceURL, False
'设置这个Content-Type很重要
objHTTP.SetRequestHeader "Content-Type", "application/x-www-form-urlencoded"
objHTTP.Send(strRequest)
bOK = xmlDOC.load(objHTTP.responseXML)
'看看状态值
if objHTTP.Status=200 then
xmlStr = xmlDOC.xml
xmlStr = Replace(xmlStr,"<","<",1,-1,1)
xmlStr = Replace(xmlStr,">",">",1,-1,1)
Response.Write xmlStr
else
Response.Write objHTTP.Statu&"<br>"
Response.Write objHTTP.StatusText
end if
%>
以上代码在本地测试都没有问题(在部署webservice的本地机器上测试的),然而把strWebserviceURL = "http://localhost/possible/Service1.asmx/add"改为部署在其他机器上的webservice时,却出了问题,结果一直是返回500错误,即objHTTP.Status一直都为500。
原因在于.Net Framework1.1默认不支持HttpGet和HttpPost。如果修改webservice里的web.config增加
<webServices>
<protocols>
<add name="HttpPost"/>
<add name="HttpGet"/>
</protocols>
</webServices>
后,上代码就可以调用远程机器上的webservice了。
而利用SOAP发送在默认情况下即可得到.Net Framework1.1的支持,因此用构造Soap请求的xml字符串给xmlhttp对象来send的方法就对远程服务器的web.config没有要求了,于是根据local显示的例子构造了一个soapRequest的string,发送给了即将部署的远程主机,结果返回了200的status code,并且可以顺利取得responseXML.类似代码如下:
客户端代码如下:
<script language="vbscript">
Dim url,xmlhttp,dom,node,xmlDOC
'根据webservice的测试页不同的方法构造不同的soap request
SoapRequest = "<?xml version="&CHR(34)&"1.0"&CHR(34)&" encoding="&CHR(34)&"utf-8"&CHR(34)&"?>"& _
"<soap:Envelope xmlns:xsi="&CHR(34)&"http://www.w3.org/2001/XMLSchema-instance"&CHR(34)&" "& _
"xmlns:xsd="&CHR(34)&"http://www.w3.org/2001/XMLSchema"&CHR(34)&" "& _
"xmlns:soap="&CHR(34)&"http://schemas.xmlsoap.org/soap/envelope/"&CHR(34)&">"& _
"<soap:Body>"& _
"<add xmlns="&CHR(34)&"http://localhost"&CHR(34)&">"& _
"<x>3</x>"& _
"<y>4</y>"& _
"</add>"& _
"</soap:Body>"& _
"</soap:Envelope>"
url = "http://www.xxxx.com/Service1.asmx?methodname=Add"
Set xmlDOC =CreateObject("MSXML.DOMDocument")
xmlDOC.loadXML(SoapRequest)
Set xmlhttp = CreateObject("Msxml2.XMLHTTP")
xmlhttp.Open "POST",url,false
xmlhttp.setRequestHeader "Content-Type", "text/xml;charset=utf-8"
'SOAPAction这个Header头同样可以在sample中找到
xmlhttp.setRequestHeader "SOAPAction", "http://localhost/add"
xmlhttp.setRequestHeader "Content-Length",LEN(SoapRequest)
xmlhttp.Send(xmlDOC)
msgbox xmlhttp.Status
msgbox xmlhttp.StatusText
msgbox xmlhttp.responseText
If xmlhttp.Status = 200 Then
xmlDOC.load(xmlhttp.responseXML)
msgbox "执行结果为:"&xmlDOC.getElementsByTagName("addResult")(0).text
else
msgbox "failed"
end if
</script>
改为服务器端的asp代码为:
<%
Dim url,xmlhttp,dom,node,xmlDOC
'根据webservice的测试页不同的方法构造不同的soap request
SoapRequest = "<?xml version="&CHR(34)&"1.0"&CHR(34)&" encoding="&CHR(34)&"utf-8"&CHR(34)&"?>"& _
"<soap:Envelope xmlns:xsi="&CHR(34)&"http://www.w3.org/2001/XMLSchema-instance"&CHR(34)&" "& _
"xmlns:xsd="&CHR(34)&"http://www.w3.org/2001/XMLSchema"&CHR(34)&" "& _
"xmlns:soap="&CHR(34)&"http://schemas.xmlsoap.org/soap/envelope/"&CHR(34)&">"& _
"<soap:Body>"& _
"<add xmlns="&CHR(34)&"http://localhost"&CHR(34)&">"& _
"<x>3</x>"& _
"<y>4</y>"& _
"</add>"& _
"</soap:Body>"& _
"</soap:Envelope>"
url = "http://www.xxxx.com/Service1.asmx?methodname=Add"
Set xmlDOC =server.CreateObject("MSXML.DOMDocument")
xmlDOC.loadXML(SoapRequest)
Set xmlhttp = server.CreateObject("Msxml2.XMLHTTP")
xmlhttp.Open "POST",url,false
xmlhttp.setRequestHeader "Content-Type", "text/xml;charset=utf-8"
xmlhttp.setRequestHeader "SOAPAction", "http://localhost/add"
xmlhttp.setRequestHeader "Content-Length",LEN(SoapRequest)
xmlhttp.Send(xmlDOC)
If xmlhttp.Status = 200 Then
xmlDOC.load(xmlhttp.responseXML)
Response.Write xmlhttp.Status&"<br>"
Response.Write xmlhttp.StatusText&"<br>执行结果为:"
Response.Write xmlDOC.getElementsByTagName("addResult")(0).text
else
Response.Write xmlhttp.Status&"<br>"
Response.Write xmlhttp.StatusText
end if
%>
以上用的都是vbscript的,对于javascript基本上都是一样的,只需要做一些小的改动,具体代码这里就省略了。
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
附:
测试时用的webservice文件Service1.asmx的代码:
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Web;
using System.Web.Services;
namespace possible
{
/// <summary>
/// Service1 的摘要说明。
/// </summary>
[WebService(Description="my web service",Name="myService",Namespace="http://localhost")]
public class myService : System.Web.Services.WebService
{
public myService()
{
//CODEGEN: 该调用是 ASP.NET Web 服务设计器所必需的
InitializeComponent();
}
#region 组件设计器生成的代码
//Web 服务设计器所必需的
private IContainer components = null;
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if(disposing && components != null)
{
components.Dispose();
}
base.Dispose(disposing);
}
#endregion
[WebMethod(Description="返回两整数之和")]
public int add(int x,int y)
{
return x+y;
}
}
}