使用vbscript腳本調(diào)用web服務(wù)
發(fā)表時(shí)間:2023-08-02 來(lái)源:明輝站整理相關(guān)軟件相關(guān)文章人氣:7
[摘要]最近碰到的一個(gè)問(wèn)題,需要在asp和客戶端調(diào)用.NET的webservice,也就是說(shuō)需要用vbscript或javascript來(lái)調(diào)用webservice。在網(wǎng)上看了看,大多數(shù)方案都是利用SOAP ...
最近碰到的一個(gè)問(wèn)題,需要在asp和客戶端調(diào)用.NET的webservice,也就是說(shuō)需要用vbscript或javascript來(lái)調(diào)用webservice。在網(wǎng)上看了看,大多數(shù)方案都是利用SOAP Toolkit,但是因?yàn)镾OAP Toolkit在今年就會(huì)被停止后續(xù)的支持了,并且要使用soapclient需要專(zhuān)門(mén)安裝SOAP Toolkit,這對(duì)客戶端來(lái)說(shuō)不具有通用性,因此想到了使用xmlhttp,利用xmlhttp來(lái)和webservice交互。
客戶端代碼如下:
<script language="vbscript">
Set objHTTP = CreateObject("MSXML2.XMLHTTP")
Set xmlDOC =CreateObject("MSXML.DOMDocument")
strWebserviceURL = "http://localhost/possible/Service1.asmx/add"
'設(shè)置參數(shù)及其值
strRequest = "x=2&y=3"
objHTTP.Open "POST", strWebserviceURL, False
'設(shè)置這個(gè)Content-Type很重要
objHTTP.SetRequestHeader "Content-Type", "application/x-www-form-urlencoded"
objHTTP.Send(strRequest)
bOK = xmlDOC.load(objHTTP.responseXML)
'看看狀態(tài)值
msgBox objHTTP.Status
msgbox objHTTP.StatusText
'objHTTP.Status=200,這里就可以處理返回的xml片段了
'如果需要,可以替換返回的xml字符串當(dāng)中的<和>
xmlStr = xmlDOC.xml
xmlStr = Replace(xmlStr,"<","<",1,-1,1)
xmlStr = Replace(xmlStr,">",">",1,-1,1)
msgbox xmlStr
</script>
改為服務(wù)器端的asp代碼為:
<%
Set objHTTP = Server.CreateObject("MSXML2.XMLHTTP")
Set xmlDOC =Server.CreateObject("MSXML.DOMDocument")
strWebserviceURL = "http://localhost/possible/Service1.asmx/add"
'設(shè)置參數(shù)及其值
strRequest = "x=2&y=3"
objHTTP.Open "POST", strWebserviceURL, False
'設(shè)置這個(gè)Content-Type很重要
objHTTP.SetRequestHeader "Content-Type", "application/x-www-form-urlencoded"
objHTTP.Send(strRequest)
bOK = xmlDOC.load(objHTTP.responseXML)
'看看狀態(tài)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
%>
以上代碼在本地測(cè)試都沒(méi)有問(wèn)題(在部署webservice的本地機(jī)器上測(cè)試的),然而把strWebserviceURL = "http://localhost/possible/Service1.asmx/add"改為部署在其他機(jī)器上的webservice時(shí),卻出了問(wèn)題,結(jié)果一直是返回500錯(cuò)誤,即objHTTP.Status一直都為500。
原因在于.Net Framework1.1默認(rèn)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,上代碼就可以調(diào)用遠(yuǎn)程機(jī)器上的webservice了。
而利用SOAP發(fā)送在默認(rèn)情況下即可得到.Net Framework1.1的支持,因此用構(gòu)造Soap請(qǐng)求的xml字符串給xmlhttp對(duì)象來(lái)send的方法就對(duì)遠(yuǎn)程服務(wù)器的web.config沒(méi)有要求了,于是根據(jù)local顯示的例子構(gòu)造了一個(gè)soapRequest的string,發(fā)送給了即將部署的遠(yuǎn)程主機(jī),結(jié)果返回了200的status code,并且可以順利取得responseXML.類(lèi)似代碼如下:
客戶端代碼如下:
<script language="vbscript">
Dim url,xmlhttp,dom,node,xmlDOC
'根據(jù)webservice的測(cè)試頁(yè)不同的方法構(gòu)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這個(gè)Header頭同樣可以在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 "執(zhí)行結(jié)果為:"&xmlDOC.getElementsByTagName("addResult")(0).text
else
msgbox "failed"
end if
</script>
改為服務(wù)器端的asp代碼為:
<%
Dim url,xmlhttp,dom,node,xmlDOC
'根據(jù)webservice的測(cè)試頁(yè)不同的方法構(gòu)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>執(zhí)行結(jié)果為:"
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,對(duì)于javascript基本上都是一樣的,只需要做一些小的改動(dòng),具體代碼這里就省略了。
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附:
測(cè)試時(shí)用的webservice文件Service1.asmx的代碼:
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 的摘要說(shuō)明。
/// </summary>
[WebService(Description="my web service",Name="myService",Namespace="http://localhost")]
public class myService : System.Web.Services.WebService
{
public myService()
{
//CODEGEN: 該調(diào)用是 ASP.NET Web 服務(wù)設(shè)計(jì)器所必需的
InitializeComponent();
}
#region 組件設(shè)計(jì)器生成的代碼
//Web 服務(wù)設(shè)計(jì)器所必需的
private IContainer components = null;
/// <summary>
/// 設(shè)計(jì)器支持所需的方法 - 不要使用代碼編輯器修改
/// 此方法的內(nèi)容。
/// </summary>
private void InitializeComponent()
{
}
/// <summary>
/// 清理所有正在使用的資源。
/// </summary>
protected override void Dispose( bool disposing )
{
if(disposing && components != null)
{
components.Dispose();
}
base.Dispose(disposing);
}
#endregion
[WebMethod(Description="返回兩整數(shù)之和")]
public int add(int x,int y)
{
return x+y;
}
}
}