/// <summary>
/// Marks the method to be exported as an Ajax.NET Javascript function with the ability to access the SessionState.
/// </summary>
/// <param name="requireSessionState">The HttpSessionStateRequirement to use.</param>
public AjaxMethodAttribute(HttpSessionStateRequirement requireSessionState)
{
this.requireSessionState = requireSessionState;
}
public AjaxMethodAttribute(HttpSessionStateRequirement requireSessionState, bool useAsyncProcessing)
{
this.requireSessionState = requireSessionState;
this.useAsyncProcessing = useAsyncProcessing;
}
public AjaxMethodAttribute(int cacheSeconds, HttpSessionStateRequirement requireSessionState)
{
}
public AjaxMethodAttribute(string methodName, HttpSessionStateRequirement requireSessionState)
{
}
public AjaxMethodAttribute(HttpSessionStateRequirement requireSessionState, bool useAsyncProcessing)
{
this.requireSessionState = requireSessionState;
this.useAsyncProcessing = useAsyncProcessing;
}
/// <summary>
/// Returns an instance of a class that implements the <see cref="T:System.Web.IHttpHandler"></see> interface.
/// </summary>
/// <param name="context">An instance of the <see cref="T:System.Web.HttpContext"></see> class that provides references to intrinsic server objects (for example, Request, Response, Session, and Server) used to service HTTP requests.</param>
/// <param name="requestType">The HTTP data transfer method (GET or POST) that the client uses.</param>
/// <param name="url">The <see cref="P:System.Web.HttpRequest.RawUrl"></see> of the requested resource.</param>
/// <param name="pathTranslated">The <see cref="P:System.Web.HttpRequest.PhysicalApplicationPath"></see> to the requested resource.</param>
/// <returns>
/// A new <see cref="T:System.Web.IHttpHandler"></see> object that processes the request.
/// </returns>
public IHttpHandler GetHandler(HttpContext context, string requestType, string url, string pathTranslated)
{
// First of all we want to check what a request is running. There are three different
// requests that are made to this handler:
// 1) GET core,prototype,converter.ashx which will include the common AJAX communication
// 2) GET typename,assemblyname.ashx which will return the AJAX wrapper JavaScript code
// 3) POST typename,assemblyname.ashx which will invoke a method.
// The first two requests will return the JavaScript code or a HTTP 304 (not changed).
string filename = Path.GetFileNameWithoutExtension(context.Request.Path);
Type t = null;
//iiunknown added @16:06 2013/11/9 增加AjaxPro客户端请求对SharePoint的SPContext.Current的支持，方便服务器端Ajax方法能正确定位到当前真正的SharePoint路径下的SPContext.Current，而不需要传递过多的参数去自己构造SharePoint上下文环境。
#region AjaxPro请求的时候构造SPContext传递到当前上下文中。
string siteid = HttpContext.Current.Request.QueryString.Get("siteid");
string webid = HttpContext.Current.Request.QueryString.Get("webid");
string listid = HttpContext.Current.Request.QueryString.Get("listid");
string itemid = HttpContext.Current.Request.QueryString.Get("itemid");
string lcid = HttpContext.Current.Request.QueryString.Get("lcid");
string formmode = HttpContext.Current.Request.QueryString.Get("formmode");
int lcidNum = 2052;
if (!string.IsNullOrEmpty(lcid))
{
int.TryParse(lcid, out lcidNum);
}
System.Threading.Thread.CurrentThread.CurrentUICulture = new System.Globalization.CultureInfo(lcidNum);
SPContext spcontext = null;
if (!string.IsNullOrEmpty(siteid))
{
SPSite site = new SPSite(new Guid(siteid));
if (site != null && !string.IsNullOrEmpty(webid))
{
SPWeb web = site.OpenWeb(new Guid(webid));
if (web != null)
{
spcontext = SPContext.GetContext(HttpContext.Current, int.Parse(itemid), new Guid(listid), web);
int fm = int.Parse(formmode);
if (fm > 0)
{
spcontext.FormContext.FormMode = (Microsoft.SharePoint.WebControls.SPControlMode) int.Parse(formmode);
}
if (HttpContext.Current.Items["HttpHandlerSPSite"] == null)
{
HttpContext.Current.Items["HttpHandlerSPSite"] = site;
}
if (HttpContext.Current.Items["HttpHandlerSPWeb"] == null)
{
HttpContext.Current.Items["HttpHandlerSPWeb"] = web;
}
}
//if (string.IsNullOrEmpty(listid))
//{
// spcontext = SPContext.GetContext(web);
//}
//else
//{
// if (string.IsNullOrEmpty(itemid))
// {
// spcontext = SPContext.GetContext(HttpContext.Current, 0, new Guid(listid), web);
// }
// else
// {
// spcontext = SPContext.GetContext(HttpContext.Current, int.Parse(itemid), new Guid(listid), web);
// }
//}
}
}
if (spcontext != null)
{
//SharePoint获取当前上下文的方法。
//public static SPContext GetContext(HttpContext context)
//{
// if (context == null)
// {
// throw SPUtility.GetStandardArgumentNullException("context");
// }
// SPContext context2 = (SPContext) context.Items["DefaultSPContext"];
// if (context2 == null)
// {
// context2 = new SPContext(context, 0, Guid.Empty, null);
// context.Items["DefaultSPContext"] = context2;
// string str = DefaultKey(context, null);
// context.Items[str] = context2;
// }
// return context2;
//}
context.Items["DefaultSPContext"] = spcontext;
}
#endregion
Exception typeException = null;
bool isInTypesList = false;
try
{
if (Utility.Settings != null && Utility.Settings.UrlNamespaceMappings.Contains(filename))
{
isInTypesList = true;
t = Type.GetType(Utility.Settings.UrlNamespaceMappings[filename].ToString(), true);
}
if (t == null)
{
t = Type.GetType(filename, true);
}
}
catch (Exception ex)
{
typeException = ex;
}
switch (requestType)
{
case "GET": // get the JavaScript files
switch (filename.ToLower())
{
case "prototype":
return(new EmbeddedJavaScriptHandler("prototype"));
case "core":
return(new EmbeddedJavaScriptHandler("core"));
case "ms":
return(new EmbeddedJavaScriptHandler("ms"));
case "prototype-core":
case "core-prototype":
return(new EmbeddedJavaScriptHandler("prototype,core"));
case "converter":
return(new ConverterJavaScriptHandler());
default:
if (typeException != null)
{
#if (WEBEVENT)
string errorText = string.Format(Constant.AjaxID + " Error", context.User.Identity.Name);
Management.WebAjaxErrorEvent ev = new Management.WebAjaxErrorEvent(errorText, WebEventCodes.WebExtendedBase + 201, typeException);
ev.Raise();
#endif
return(null);
}
if (Utility.Settings.OnlyAllowTypesInList == true && isInTypesList == false)
{
return(null);
}
return(new TypeJavaScriptHandler(t));
}
case "POST": // invoke the method
if (Utility.Settings.OnlyAllowTypesInList == true && isInTypesList == false)
{
return(null);
}
IAjaxProcessor[] p = new IAjaxProcessor[2];
p[0] = new XmlHttpRequestProcessor(context, t);
p[1] = new IFrameProcessor(context, t);
for (int i = 0; i < p.Length; i++)
{
if (p[i].CanHandleRequest)
{
if (typeException != null)
{
#if (WEBEVENT)
string errorText = string.Format(Constant.AjaxID + " Error", context.User.Identity.Name);
Management.WebAjaxErrorEvent ev = new Management.WebAjaxErrorEvent(errorText, WebEventCodes.WebExtendedBase + 200, typeException);
ev.Raise();
#endif
p[i].SerializeObject(new NotSupportedException("This method is either not marked with an AjaxMethod or is not available."));
return(null);
}
AjaxMethodAttribute[] ma = (AjaxMethodAttribute[])p[i].AjaxMethod.GetCustomAttributes(typeof(AjaxMethodAttribute), true);
bool useAsync = false;
HttpSessionStateRequirement sessionReq = HttpSessionStateRequirement.ReadWrite;
if (Utility.Settings.OldStyle.Contains("sessionStateDefaultNone"))
{
sessionReq = HttpSessionStateRequirement.None;
}
if (ma.Length > 0)
{
useAsync = ma[0].UseAsyncProcessing;
if (ma[0].RequireSessionState != HttpSessionStateRequirement.UseDefault)
{
sessionReq = ma[0].RequireSessionState;
}
}
switch (sessionReq)
{
case HttpSessionStateRequirement.Read:
if (!useAsync)
{
return(new AjaxSyncHttpHandlerSessionReadOnly(p[i]));
}
else
{
return(new AjaxAsyncHttpHandlerSessionReadOnly(p[i]));
}
case HttpSessionStateRequirement.ReadWrite:
if (!useAsync)
{
return(new AjaxSyncHttpHandlerSession(p[i]));
}
else
{
return(new AjaxAsyncHttpHandlerSession(p[i]));
}
case HttpSessionStateRequirement.None:
if (!useAsync)
{
return(new AjaxSyncHttpHandler(p[i]));
}
else
{
return(new AjaxAsyncHttpHandler(p[i]));
}
default:
if (!useAsync)
{
return(new AjaxSyncHttpHandlerSession(p[i]));
}
else
{
return(new AjaxAsyncHttpHandlerSession(p[i]));
}
}
}
}
break;
}
return(null);
}
/// <summary>
/// Marks the method to be exported as an Ajax.NET Javascript function with the ability to access the SessionState.
/// </summary>
/// <param name="requireSessionState">The HttpSessionStateRequirement to use.</param>
public AjaxMethodAttribute(HttpSessionStateRequirement requireSessionState)
{
this.requireSessionState = requireSessionState;
}
public AjaxMethodAttribute(string methodName, HttpSessionStateRequirement requireSessionState)
{
}
public AjaxMethodAttribute(int cacheSeconds, HttpSessionStateRequirement requireSessionState)
{
}
/// <summary>
/// Returns an instance of a class that implements the <see cref="T:System.Web.IHttpHandler"></see> interface.
/// </summary>
/// <param name="context">An instance of the <see cref="T:System.Web.HttpContext"></see> class that provides references to intrinsic server objects (for example, Request, Response, Session, and Server) used to service HTTP requests.</param>
/// <param name="requestType">The HTTP data transfer method (GET or POST) that the client uses.</param>
/// <param name="url">The <see cref="P:System.Web.HttpRequest.RawUrl"></see> of the requested resource.</param>
/// <param name="pathTranslated">The <see cref="P:System.Web.HttpRequest.PhysicalApplicationPath"></see> to the requested resource.</param>
/// <returns>
/// A new <see cref="T:System.Web.IHttpHandler"></see> object that processes the request.
/// </returns>
public IHttpHandler GetHandler(HttpContext context, string requestType, string url, string pathTranslated)
{
// First of all we want to check what a request is running. There are three different
// requests that are made to this handler:
// 1) GET core,prototype,converter.ashx which will include the common AJAX communication
// 2) GET typename,assemblyname.ashx which will return the AJAX wrapper JavaScript code
// 3) POST typename,assemblyname.ashx which will invoke a method.
// The first two requests will return the JavaScript code or a HTTP 304 (not changed).
string filename = Path.GetFileNameWithoutExtension(context.Request.Path);
Type t = null;
Exception typeException = null;
bool isInTypesList = false;
try
{
if (Utility.Settings != null && Utility.Settings.UrlNamespaceMappings.Contains(filename))
{
isInTypesList = true;
t = Type.GetType(Utility.Settings.UrlNamespaceMappings[filename].ToString(), true);
}
if (t == null)
{
t = Type.GetType(filename, true);
}
}
catch (Exception ex)
{
typeException = ex;
}
switch (requestType)
{
case "GET": // get the JavaScript files
switch (filename.ToLower())
{
case "prototype":
return(new EmbeddedJavaScriptHandler("prototype"));
case "core":
return(new EmbeddedJavaScriptHandler("core"));
case "ms":
return(new EmbeddedJavaScriptHandler("ms"));
case "prototype-core":
case "core-prototype":
return(new EmbeddedJavaScriptHandler("prototype,core"));
case "converter":
return(new ConverterJavaScriptHandler());
default:
if (typeException != null)
{
#if (WEBEVENT)
string errorText = string.Format(Constant.AjaxID + " Error", context.User.Identity.Name);
Management.WebAjaxErrorEvent ev = new Management.WebAjaxErrorEvent(errorText, WebEventCodes.WebExtendedBase + 201, typeException);
ev.Raise();
#endif
return(null);
}
if (Utility.Settings.OnlyAllowTypesInList == true && isInTypesList == false)
{
return(null);
}
return(new TypeJavaScriptHandler(t));
}
case "POST": // invoke the method
if (Utility.Settings.OnlyAllowTypesInList == true && isInTypesList == false)
{
return(null);
}
IAjaxProcessor[] p = new IAjaxProcessor[2];
p[0] = new XmlHttpRequestProcessor(context, t);
p[1] = new IFrameProcessor(context, t);
for (int i = 0; i < p.Length; i++)
{
if (p[i].CanHandleRequest)
{
if (typeException != null)
{
#if (WEBEVENT)
string errorText = string.Format(Constant.AjaxID + " Error", context.User.Identity.Name);
Management.WebAjaxErrorEvent ev = new Management.WebAjaxErrorEvent(errorText, WebEventCodes.WebExtendedBase + 200, typeException);
ev.Raise();
#endif
p[i].SerializeObject(new NotSupportedException("This method is either not marked with an AjaxMethod or is not available."));
return(null);
}
AjaxMethodAttribute[] ma = (AjaxMethodAttribute[])p[i].AjaxMethod.GetCustomAttributes(typeof(AjaxMethodAttribute), true);
bool useAsync = false;
HttpSessionStateRequirement sessionReq = HttpSessionStateRequirement.ReadWrite;
if (Utility.Settings.OldStyle.Contains("sessionStateDefaultNone"))
{
sessionReq = HttpSessionStateRequirement.None;
}
if (ma.Length > 0)
{
useAsync = ma[0].UseAsyncProcessing;
if (ma[0].RequireSessionState != HttpSessionStateRequirement.UseDefault)
{
sessionReq = ma[0].RequireSessionState;
}
}
switch (sessionReq)
{
case HttpSessionStateRequirement.Read:
if (!useAsync)
{
return(new AjaxSyncHttpHandlerSessionReadOnly(p[i]));
}
else
{
return(new AjaxAsyncHttpHandlerSessionReadOnly(p[i]));
}
case HttpSessionStateRequirement.ReadWrite:
if (!useAsync)
{
return(new AjaxSyncHttpHandlerSession(p[i]));
}
else
{
return(new AjaxAsyncHttpHandlerSession(p[i]));
}
case HttpSessionStateRequirement.None:
if (!useAsync)
{
return(new AjaxSyncHttpHandler(p[i]));
}
else
{
return(new AjaxAsyncHttpHandler(p[i]));
}
default:
if (!useAsync)
{
return(new AjaxSyncHttpHandlerSession(p[i]));
}
else
{
return(new AjaxAsyncHttpHandlerSession(p[i]));
}
}
}
}
break;
}
return(null);
}
private IHttpHandler GetHandler(HttpContext context, string filename)
{
Type t = null;
Exception typeException = null;
string className = filename;
if (Utility.Settings != null && Utility.Settings.UrlClassMappings.ContainsKey(filename))
{
className = Utility.Settings.UrlClassMappings[filename] as string;
if (context.Trace.IsEnabled)
{
context.Trace.Write(Constant.AjaxID, "Url match to Type: " + className);
}
}
try
{
t = Type.GetType(className, true);
}
catch (Exception ex)
{
if (context.Trace.IsEnabled)
{
context.Trace.Write(Constant.AjaxID, "Type not found: " + className);
}
typeException = ex;
}
AjaxProcessor[] p = new AjaxProcessor[3];
p[0] = new XmlHttpRequestProcessor(context, t);
p[1] = new IFrameProcessor(context, t);
p[2] = new ExtJSProcessor(context, t);
for (int i = 0; i < p.Length; i++)
{
if (!p[i].CanHandleRequest)
{
continue;
}
if (typeException != null)
{
#if (WEBEVENT)
string errorText = string.Format(Constant.AjaxID + " Error", context.User.Identity.Name);
Management.WebAjaxErrorEvent ev = new Management.WebAjaxErrorEvent(errorText, WebEventCodes.WebExtendedBase + 200, typeException);
ev.Raise();
#endif
p[i].SerializeObject(new NotSupportedException("This method is either not marked with an AjaxMethod or is not available."));
return(null);
}
AjaxMethodAttribute[] ma = (AjaxMethodAttribute[])p[i].AjaxMethod.GetCustomAttributes(typeof(AjaxMethodAttribute), true);
bool useAsync = false;
HttpSessionStateRequirement sessionReq = HttpSessionStateRequirement.ReadWrite;
if (ma.Length > 0)
{
useAsync = ma[0].UseAsyncProcessing;
if (ma[0].RequireSessionState != HttpSessionStateRequirement.UseDefault)
{
sessionReq = ma[0].RequireSessionState;
}
}
switch (sessionReq)
{
case HttpSessionStateRequirement.Read:
if (!useAsync)
{
return(new AjaxSyncHttpHandlerSessionReadOnly(p[i]));
}
else
{
return(new AjaxAsyncHttpHandlerSessionReadOnly(p[i]));
}
case HttpSessionStateRequirement.ReadWrite:
if (!useAsync)
{
return(new AjaxSyncHttpHandlerSession(p[i]));
}
else
{
return(new AjaxAsyncHttpHandlerSession(p[i]));
}
case HttpSessionStateRequirement.None:
if (!useAsync)
{
return(new AjaxSyncHttpHandler(p[i]));
}
else
{
return(new AjaxAsyncHttpHandler(p[i]));
}
default:
if (!useAsync)
{
return(new AjaxSyncHttpHandlerSession(p[i]));
}
else
{
return(new AjaxAsyncHttpHandlerSession(p[i]));
}
}
}
return(null);
}
