public void Dispose()
{
this.MethodName = null;
this.Target = null;
this.ServiceDef = null;
this.MethodDef = null;
this.Context = null;
this.ExtraData = null;
}
public void Dispose()
{
this.MethodName = null;
this.Target = null;
this.ServiceDef = null;
this.MethodDef = null;
this.Context = null;
this.ExtraData = null;
}
public void Dispose()
{
MethodName = null;
Target = null;
ServiceDef = null;
MethodDef = null;
Context = null;
ExtraData = null;
}
internal AsyncWebMethodState(string methodName, IDisposable target, WebServiceDef wsDef, WebMethodDef wmDef, HttpContext context, object extraData)
{
MethodName = methodName;
Target = target;
ServiceDef = wsDef;
MethodDef = wmDef;
Context = context;
ExtraData = extraData;
}
internal static WebServiceDef GetWebServiceType(HttpContext context, string virtualPath)
{
virtualPath = VirtualPathUtility.ToAbsolute(virtualPath.Replace(".soap", ".asmx"));
string cacheKey = GetCacheKey(virtualPath);
WebServiceDef wsType = context.Cache[cacheKey] as WebServiceDef;
if (wsType == null)
{
if (HostingEnvironment.VirtualPathProvider.FileExists(virtualPath))
{
Type compiledType = null;
try
{
compiledType = BuildManager.GetCompiledType(virtualPath);
if (compiledType == null)
{
object page = BuildManager.CreateInstanceFromVirtualPath(virtualPath, typeof(System.Web.UI.Page));
compiledType = page.GetType();
}
}
catch (SecurityException)
{
}
if (compiledType != null)
{
wsType = new WebServiceDef(compiledType);
BuildDependencySet deps = BuildManager.GetCachedBuildDependencySet(context, virtualPath);
IEnumerable virtualPaths = deps.VirtualPaths;
if (virtualPaths != null)
{
List <string> paths = new List <string>();
foreach (string path in virtualPaths)
{
paths.Add(Path.Combine(context.Request.PhysicalApplicationPath, VirtualPathUtility.GetFileName(path)));
}
context.Cache.Insert(cacheKey, wsType, new CacheDependency(paths.ToArray()));
}
else
{
context.Cache.Insert(cacheKey, wsType);
}
}
}
}
if (wsType == null)
{
throw new InvalidOperationException("Webservice does not exist");
}
return(wsType);
}
public WebMethodDef(WebServiceDef wsDef, MethodInfo method, WebMethodAttribute wmAttribute, ScriptMethodAttribute smAttribute, TransactionalMethodAttribute tmAttribute, ETagMethodAttribute emAttribute)
{
this.MethodType = method;
this.WebMethodAtt = wmAttribute;
this.ScriptMethodAtt = smAttribute;
this.TransactionAtt = tmAttribute;
if (null != emAttribute)
{
this.IsETagEnabled = emAttribute.Enabled;
}
if (wmAttribute != null && !string.IsNullOrEmpty(wmAttribute.MessageName))
{
this.MethodName = wmAttribute.MessageName;
}
else
{
this.MethodName = method.Name;
}
// HTTP GET method is allowed only when there's a [ScriptMethod] attribute and UseHttpGet is true
this.IsGetAllowed = (this.ScriptMethodAtt != null && this.ScriptMethodAtt.UseHttpGet);
this.ResponseFormat = (this.ScriptMethodAtt != null ? this.ScriptMethodAtt.ResponseFormat : ResponseFormat.Json);
MethodInfo beginMethod = wsDef.WSType.GetMethod("Begin" + method.Name, BINDING_FLAGS);
if (null != beginMethod)
{
// The BeginXXX method must have the [ScriptMethod] attribute
object[] scriptMethodAttributes = beginMethod.GetCustomAttributes(typeof(ScriptMethodAttribute), false);
if (scriptMethodAttributes.Length > 0)
{
// Asynchronous methods found for the function
this.HasAsyncMethods = true;
this.BeginMethod = new WebMethodDef(wsDef, beginMethod, null, null, null, null);
MethodInfo endMethod = wsDef.WSType.GetMethod("End" + method.Name, BINDING_FLAGS);
this.EndMethod = new WebMethodDef(wsDef, endMethod, null, null, null, null);
// get all parameters of begin web method and then leave last two parameters in the input parameters list because
// last two parameters are for AsyncCallback and Async State
ParameterInfo[] allParameters = beginMethod.GetParameters();
ParameterInfo[] inputParameters = new ParameterInfo[allParameters.Length - 2];
Array.Copy(allParameters, inputParameters, allParameters.Length - 2);
this.BeginMethod.InputParameters = new List <ParameterInfo>(inputParameters);
this.BeginMethod.InputParametersWithAsyc = new List <ParameterInfo>(allParameters);
}
}
this.InputParameters = new List <ParameterInfo>(method.GetParameters());
}
internal AsyncWebMethodState(string methodName,
IDisposable target, WebServiceDef wsDef, WebMethodDef wmDef, HttpContext context,
object extraData)
{
this.MethodName = methodName;
this.Target = target;
this.ServiceDef = wsDef;
this.MethodDef = wmDef;
this.Context = context;
this.ExtraData = extraData;
}
/// <summary>
/// Execute web method synchronously
/// </summary>
/// <param name="context"></param>
/// <param name="methodDef"></param>
/// <param name="serviceDef"></param>
private void ExecuteMethod(HttpContext context, WebMethodDef methodDef, WebServiceDef serviceDef)
{
IDictionary <string, object> inputValues = GetRawParams(context, methodDef.InputParameters, serviceDef.Serializer);
object[] parameters = StrongTypeParameters(inputValues, methodDef.InputParameters);
object returnValue = null;
using (IDisposable target = Activator.CreateInstance(serviceDef.WSType) as IDisposable)
{
TransactionScope ts = null;
try
{
// If the method has a transaction attribute, then call the method within a transaction scope
if (methodDef.TransactionAtt != null)
{
TransactionOptions options = new TransactionOptions();
options.IsolationLevel = methodDef.TransactionAtt.IsolationLevel;
options.Timeout = TimeSpan.FromSeconds(methodDef.TransactionAtt.Timeout);
ts = new TransactionScope(methodDef.TransactionAtt.TransactionOption, options);
}
returnValue = methodDef.MethodType.Invoke(target, parameters);
// If transaction was used, then complete the transaction because no exception was
// generated
if (null != ts)
{
ts.Complete();
}
GenerateResponse(returnValue, context, methodDef, serviceDef);
}
catch (Exception x)
{
WebServiceHelper.WriteExceptionJsonString(context, x, serviceDef.Serializer);
}
finally
{
// If transaction was started for the method, dispose the transaction. This will
// rollback if not committed
if (null != ts)
{
ts.Dispose();
}
// Dispose the web service
target.Dispose();
}
}
}
public JsonTypeResolver(WebServiceDef def)
{
this._serializer = new JavaScriptSerializer(this);
this._typeData = def;
}
IAsyncResult IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, object extraData)
{
// Proper Content-Type header must be present in order to make a REST call
if (!IsRestMethodCall(context.Request))
{
return(GenerateErrorResponse(context, "Not a valid REST call", extraData));
}
string methodName = context.Request.PathInfo.Substring(1);
WebServiceDef wsDef = WebServiceHelper.GetWebServiceType(context, context.Request.FilePath);
WebMethodDef methodDef = wsDef.Methods[methodName];
if (null == methodDef)
{
return(GenerateErrorResponse(context, "Web method not supported: " + methodName, extraData));
}
// GET request will only be allowed if the method says so
if (context.Request.HttpMethod == "GET" && !methodDef.IsGetAllowed)
{
return(GenerateErrorResponse(context, "Http Get method not supported", extraData));
}
context.Response.Filter = new ResponseFilter(context.Response);
// If the method does not have a BeginXXX and EndXXX pair, execute it synchronously
if (!methodDef.HasAsyncMethods)
{
// Do synchronous call
ExecuteMethod(context, methodDef, wsDef);
// Return a result that says method was executed synchronously
return(new AsmxHandlerSyncResult(extraData));
}
else
{
// Call the Begin method of web service
IDisposable target = Activator.CreateInstance(wsDef.WSType) as IDisposable;
WebMethodDef beginMethod = methodDef.BeginMethod;
int allParameterCount = beginMethod.InputParametersWithAsyc.Count;
IDictionary <string, object> inputValues = GetRawParams(context, beginMethod.InputParameters, wsDef.Serializer);
object[] parameterValues = StrongTypeParameters(inputValues, beginMethod.InputParameters);
// Prepare the list of parameter values which will also include the AsyncCallback and the state
object[] parameterValuesWithAsync = new object[allParameterCount];
Array.Copy(parameterValues, parameterValuesWithAsync, parameterValues.Length);
// Populate last two parameters with async callback and state
parameterValuesWithAsync[allParameterCount - 2] = cb;
AsyncWebMethodState webMethodState = new AsyncWebMethodState(methodName, target,
wsDef, methodDef, context, extraData);
parameterValuesWithAsync[allParameterCount - 1] = webMethodState;
try
{
// Invoke the BeginXXX method and ensure the return result has AsyncWebMethodState. This state
// contains context and other information which we need in oreder to call the EndXXX
IAsyncResult result = beginMethod.MethodType.Invoke(target, parameterValuesWithAsync) as IAsyncResult;
// If execution has completed synchronously within the BeginXXX function, then generate response
// immediately. There's no need to call EndXXX
if (result.CompletedSynchronously)
{
object returnValue = result.AsyncState;
GenerateResponse(returnValue, context, methodDef, wsDef);
target.Dispose();
return(new AsmxHandlerSyncResult(extraData));
}
else
{
if (result.AsyncState is AsyncWebMethodState)
{
return(result);
}
else
{
throw new InvalidAsynchronousStateException("The state passed in the " + beginMethod.MethodName + " must inherit from " + typeof(AsyncWebMethodState).FullName);
}
}
}
catch (Exception x)
{
target.Dispose();
WebServiceHelper.WriteExceptionJsonString(context, x, wsDef.Serializer);
return(new AsmxHandlerSyncResult(extraData));
}
}
}
private void GenerateResponse(object returnValue, HttpContext context, WebMethodDef methodDef, WebServiceDef serviceDef)
{
if (context.Response.Filter.Length > 0)
{
// Response has already been transmitted by the WebMethod.
// So, do nothing
return;
}
string responseString = null;
string contentType = "application/json";
if (methodDef.ResponseFormat == System.Web.Script.Services.ResponseFormat.Json)
{
responseString = "{ d : (" + serviceDef.Serializer.Serialize(returnValue) + ")}";
contentType = "application/json";
}
else if (methodDef.ResponseFormat == System.Web.Script.Services.ResponseFormat.Xml)
{
responseString = returnValue as string;
contentType = "text/xml";
}
context.Response.ContentType = contentType;
// If we have response and no redirection happening and client still connected, send response
if (responseString != null &&
!context.Response.IsRequestBeingRedirected &&
context.Response.IsClientConnected)
{
// Produce proper cache. If no cache information specified on method and there's been no cache related
// changes done within the web method code, then default cache will be private, no cache.
if (IsCacheSet(context.Response) || methodDef.IsETagEnabled)
{
// Cache has been modified within the code. So, do not change any cache policy
}
else
{
// Cache is still private. Check if there's any CacheDuration set in WebMethod
int cacheDuration = methodDef.WebMethodAtt.CacheDuration;
if (cacheDuration > 0)
{
// If CacheDuration attribute is set, use server side caching
context.Response.Cache.SetCacheability(HttpCacheability.Server);
context.Response.Cache.SetExpires(DateTime.Now.AddSeconds(cacheDuration));
context.Response.Cache.SetSlidingExpiration(false);
context.Response.Cache.SetValidUntilExpires(true);
if (methodDef.InputParameters.Count > 0)
{
context.Response.Cache.VaryByParams["*"] = true;
}
else
{
context.Response.Cache.VaryByParams.IgnoreParams = true;
}
}
else
{
context.Response.Cache.SetNoServerCaching();
context.Response.Cache.SetMaxAge(TimeSpan.Zero);
}
}
// Check if there's any need to do ETag match. If ETag matches, produce HTTP 304, otherwise
// render the content along with the ETag
if (methodDef.IsETagEnabled)
{
string etag = context.Request.Headers["If-None-Match"];
string hash = GetMd5Hash(responseString);
if (!string.IsNullOrEmpty(etag))
{
if (string.Compare(hash, etag, true) == 0)
{
// Send no body as response and we will just abort it
context.Response.ClearContent();
context.Response.AppendHeader("Content-Length", "0");
context.Response.SuppressContent = true;
context.Response.StatusCode = 304;
// No need to produce output response body
return;
}
}
// ETag comparison did not happen or comparison did not match. So, we need to produce new ETag
HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.Public);
HttpContext.Current.Response.Cache.AppendCacheExtension("must-revalidate, proxy-revalidate");
HttpContext.Current.Response.Cache.SetETag(hash);
HttpContext.Current.Response.Cache.SetLastModified(DateTime.Now);
int cacheDuration = methodDef.WebMethodAtt.CacheDuration;
if (cacheDuration > 0)
{
context.Response.Cache.SetExpires(DateTime.Now.AddMinutes(cacheDuration));
context.Response.Cache.SetMaxAge(TimeSpan.FromMinutes(cacheDuration));
}
else
{
context.Response.Cache.SetMaxAge(TimeSpan.FromSeconds(10));
}
}
// Convert the response to response encoding, e.g. utf8
byte[] unicodeBytes = Encoding.Unicode.GetBytes(responseString);
byte[] utf8Bytes = Encoding.Convert(Encoding.Unicode, context.Response.ContentEncoding, unicodeBytes);
// Emit content length in UTF8 encoding string
context.Response.AppendHeader("Content-Length", utf8Bytes.Length.ToString());
// Instead of Response.Write which will convert the output to UTF8, use the internal stream
// to directly write the utf8 bytes
context.Response.OutputStream.Write(utf8Bytes, 0, utf8Bytes.Length);
}
else
{
// Send no body as response and we will just abort it
context.Response.AppendHeader("Content-Length", "0");
context.Response.ClearContent();
context.Response.StatusCode = 204; // No Content
}
}
private void GenerateResponse(object returnValue, HttpContext context, WebMethodDef methodDef, WebServiceDef serviceDef)
{
if (context.Response.Filter.Length > 0)
{
// Response has already been transmitted by the WebMethod.
// So, do nothing
return;
}
string responseString = null;
string contentType = "application/json";
if (methodDef.ResponseFormat == System.Web.Script.Services.ResponseFormat.Json)
{
responseString = "{ d : (" + serviceDef.Serializer.Serialize(returnValue) + ")}";
contentType = "application/json";
}
else if (methodDef.ResponseFormat == System.Web.Script.Services.ResponseFormat.Xml)
{
responseString = returnValue as string;
contentType = "text/xml";
}
context.Response.ContentType = contentType;
// If we have response and no redirection happening and client still connected, send response
if (responseString != null
&& !context.Response.IsRequestBeingRedirected
&& context.Response.IsClientConnected)
{
// Produce proper cache. If no cache information specified on method and there's been no cache related
// changes done within the web method code, then default cache will be private, no cache.
if (IsCacheSet(context.Response) || methodDef.IsETagEnabled)
{
// Cache has been modified within the code. So, do not change any cache policy
}
else
{
// Cache is still private. Check if there's any CacheDuration set in WebMethod
int cacheDuration = methodDef.WebMethodAtt.CacheDuration;
if (cacheDuration > 0)
{
// If CacheDuration attribute is set, use server side caching
context.Response.Cache.SetCacheability(HttpCacheability.Server);
context.Response.Cache.SetExpires(DateTime.Now.AddSeconds(cacheDuration));
context.Response.Cache.SetSlidingExpiration(false);
context.Response.Cache.SetValidUntilExpires(true);
if (methodDef.InputParameters.Count > 0)
{
context.Response.Cache.VaryByParams["*"] = true;
}
else
{
context.Response.Cache.VaryByParams.IgnoreParams = true;
}
}
else
{
context.Response.Cache.SetNoServerCaching();
context.Response.Cache.SetMaxAge(TimeSpan.Zero);
}
}
// Check if there's any need to do ETag match. If ETag matches, produce HTTP 304, otherwise
// render the content along with the ETag
if (methodDef.IsETagEnabled)
{
string etag = context.Request.Headers["If-None-Match"];
string hash = GetMd5Hash(responseString);
if (!string.IsNullOrEmpty(etag))
{
if (string.Compare(hash, etag, true) == 0)
{
// Send no body as response and we will just abort it
context.Response.ClearContent();
context.Response.AppendHeader("Content-Length", "0");
context.Response.SuppressContent = true;
context.Response.StatusCode = 304;
// No need to produce output response body
return;
}
}
// ETag comparison did not happen or comparison did not match. So, we need to produce new ETag
HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.Public);
HttpContext.Current.Response.Cache.AppendCacheExtension("must-revalidate, proxy-revalidate");
HttpContext.Current.Response.Cache.SetETag(hash);
HttpContext.Current.Response.Cache.SetLastModified(DateTime.Now);
int cacheDuration = methodDef.WebMethodAtt.CacheDuration;
if (cacheDuration > 0)
{
context.Response.Cache.SetExpires(DateTime.Now.AddMinutes(cacheDuration));
context.Response.Cache.SetMaxAge(TimeSpan.FromMinutes(cacheDuration));
}
else
{
context.Response.Cache.SetMaxAge(TimeSpan.FromSeconds(10));
}
}
// Convert the response to response encoding, e.g. utf8
byte[] unicodeBytes = Encoding.Unicode.GetBytes(responseString);
byte[] utf8Bytes = Encoding.Convert(Encoding.Unicode, context.Response.ContentEncoding, unicodeBytes);
// Emit content length in UTF8 encoding string
context.Response.AppendHeader("Content-Length", utf8Bytes.Length.ToString());
// Instead of Response.Write which will convert the output to UTF8, use the internal stream
// to directly write the utf8 bytes
context.Response.OutputStream.Write(utf8Bytes, 0, utf8Bytes.Length);
}
else
{
// Send no body as response and we will just abort it
context.Response.AppendHeader("Content-Length", "0");
context.Response.ClearContent();
context.Response.StatusCode = 204; // No Content
}
}
/// <summary>
/// Execute web method synchronously
/// </summary>
/// <param name="context"></param>
/// <param name="methodDef"></param>
/// <param name="serviceDef"></param>
private void ExecuteMethod(HttpContext context, WebMethodDef methodDef, WebServiceDef serviceDef)
{
IDictionary<string, object> inputValues = GetRawParams(context, methodDef.InputParameters, serviceDef.Serializer);
object[] parameters = StrongTypeParameters(inputValues, methodDef.InputParameters);
object returnValue = null;
using (IDisposable target = Activator.CreateInstance(serviceDef.WSType) as IDisposable)
{
TransactionScope ts = null;
try
{
// If the method has a transaction attribute, then call the method within a transaction scope
if (methodDef.TransactionAtt != null)
{
TransactionOptions options = new TransactionOptions();
options.IsolationLevel = methodDef.TransactionAtt.IsolationLevel;
options.Timeout = TimeSpan.FromSeconds( methodDef.TransactionAtt.Timeout );
ts = new TransactionScope(methodDef.TransactionAtt.TransactionOption, options);
}
returnValue = methodDef.MethodType.Invoke(target, parameters);
// If transaction was used, then complete the transaction because no exception was
// generated
if( null != ts ) ts.Complete();
GenerateResponse(returnValue, context, methodDef, serviceDef);
}
catch (Exception x)
{
WebServiceHelper.WriteExceptionJsonString(context, x, serviceDef.Serializer);
}
finally
{
// If transaction was started for the method, dispose the transaction. This will
// rollback if not committed
if( null != ts) ts.Dispose();
// Dispose the web service
target.Dispose();
}
}
}
internal static WebServiceDef GetWebServiceType(HttpContext context, string virtualPath)
{
virtualPath = VirtualPathUtility.ToAbsolute(virtualPath.Replace(".soap", ".asmx"));
string cacheKey = GetCacheKey(virtualPath);
WebServiceDef wsType = context.Cache[cacheKey] as WebServiceDef;
if (wsType == null)
{
if (HostingEnvironment.VirtualPathProvider.FileExists(virtualPath))
{
Type compiledType = null;
try
{
compiledType = BuildManager.GetCompiledType(virtualPath);
if (compiledType == null)
{
object page = BuildManager.CreateInstanceFromVirtualPath(virtualPath, typeof(System.Web.UI.Page));
compiledType = page.GetType();
}
}
catch (SecurityException)
{
}
if (compiledType != null)
{
wsType = new WebServiceDef(compiledType);
BuildDependencySet deps = BuildManager.GetCachedBuildDependencySet(context, virtualPath);
IEnumerable virtualPaths = deps.VirtualPaths;
if (virtualPaths != null)
{
List<string> paths = new List<string>();
foreach (string path in virtualPaths)
{
paths.Add(Path.Combine(context.Request.PhysicalApplicationPath, VirtualPathUtility.GetFileName(path)));
}
context.Cache.Insert(cacheKey, wsType, new CacheDependency(paths.ToArray()));
}
else
{
context.Cache.Insert(cacheKey, wsType);
}
}
}
}
if (wsType == null)
{
throw new InvalidOperationException("Webservice does not exist");
}
return wsType;
}
public JsonTypeResolver(WebServiceDef def)
{
this._serializer = new JavaScriptSerializer(this);
this._typeData = def;
}
public WebMethodDef(WebServiceDef wsDef, MethodInfo method, WebMethodAttribute wmAttribute, ScriptMethodAttribute smAttribute, TransactionalMethodAttribute tmAttribute, ETagMethodAttribute emAttribute)
{
this.MethodType = method;
this.WebMethodAtt = wmAttribute;
this.ScriptMethodAtt = smAttribute;
this.TransactionAtt = tmAttribute;
if( null != emAttribute ) this.IsETagEnabled = emAttribute.Enabled;
if (wmAttribute != null && !string.IsNullOrEmpty(wmAttribute.MessageName)) this.MethodName = wmAttribute.MessageName;
else this.MethodName = method.Name;
// HTTP GET method is allowed only when there's a [ScriptMethod] attribute and UseHttpGet is true
this.IsGetAllowed = (this.ScriptMethodAtt != null && this.ScriptMethodAtt.UseHttpGet);
this.ResponseFormat = (this.ScriptMethodAtt != null ? this.ScriptMethodAtt.ResponseFormat : ResponseFormat.Json);
MethodInfo beginMethod = wsDef.WSType.GetMethod("Begin" + method.Name, BINDING_FLAGS);
if (null != beginMethod)
{
// The BeginXXX method must have the [ScriptMethod] attribute
object[] scriptMethodAttributes = beginMethod.GetCustomAttributes(typeof(ScriptMethodAttribute), false);
if (scriptMethodAttributes.Length > 0)
{
// Asynchronous methods found for the function
this.HasAsyncMethods = true;
this.BeginMethod = new WebMethodDef(wsDef, beginMethod, null, null, null, null);
MethodInfo endMethod = wsDef.WSType.GetMethod("End" + method.Name, BINDING_FLAGS);
this.EndMethod = new WebMethodDef(wsDef, endMethod, null, null, null, null);
// get all parameters of begin web method and then leave last two parameters in the input parameters list because
// last two parameters are for AsyncCallback and Async State
ParameterInfo[] allParameters = beginMethod.GetParameters();
ParameterInfo[] inputParameters = new ParameterInfo[allParameters.Length - 2];
Array.Copy(allParameters, inputParameters, allParameters.Length - 2);
this.BeginMethod.InputParameters = new List<ParameterInfo>(inputParameters);
this.BeginMethod.InputParametersWithAsyc = new List<ParameterInfo>(allParameters);
}
}
this.InputParameters = new List<ParameterInfo>(method.GetParameters());
}