public object Lookup(BridgeContext context) {
object result = null;
if (_cache.TryGetValue(GetCacheKey(context), out result)) {
return result;
}
return null;
}
// Generate hash from Method and all args
private long GetCacheKey(BridgeContext context) {
HashCodeCombiner hasher = new HashCodeCombiner();
hasher.AddObject(context.BridgeUrl);
hasher.AddObject(context.ServiceRequest.Method);
ComputeHashCode(context.ServiceRequest.Args, hasher);
return hasher.CombinedHash;
}
// Generate hash from Method and all args
private long GetCacheKey(BridgeContext context)
{
HashCodeCombiner hasher = new HashCodeCombiner();
hasher.AddObject(context.BridgeUrl);
hasher.AddObject(context.ServiceRequest.Method);
ComputeHashCode(context.ServiceRequest.Args, hasher);
return(hasher.CombinedHash);
}
public object Lookup(BridgeContext context)
{
object result = null;
if (_cache.TryGetValue(GetCacheKey(context), out result))
{
return(result);
}
return(null);
}
protected void BuildBridgeContext(string bridgePath, BridgeRequest request)
{
_context = new BridgeContext(request, bridgePath);
}
// Helper function that resolve the config parameter values, client args, and expressions
private static void ResolveParameters(Dictionary <string, BridgeParameterInfo> parameterInfo, Dictionary <string, object> args, BridgeContext context)
{
foreach (BridgeParameterInfo paramInfo in parameterInfo.Values)
{
object paramValue = null;
// Fill in server side values as default always
if (paramInfo.Value != null)
{
paramValue = paramInfo.Value;
}
// REVIEW: what happens if doesn't exist and no default, should probably throw here? or just use null (using null for now)
if (!paramInfo.ServerOnly)
{
if (context.BridgeRequest.Args.Contains(paramInfo.Name))
{
paramValue = context.BridgeRequest.Args[paramInfo.Name];
}
}
// Handle expressions of form value= "% appsettings | querystring : key %"
string paramValueString = paramValue as string;
if (paramValueString != null)
{
paramValue = TryParseExpression(paramValueString, context);
}
args[paramInfo.ServerName] = paramValue;
}
}
internal static object TryParseExpression(string param, BridgeContext context)
{
string exp = param;
if (param.Length > MinimumExpressionLength && param.StartsWith("%", StringComparison.Ordinal) && param.EndsWith("%", StringComparison.Ordinal))
{
exp = param.Substring(1, param.Length - 2).Trim();
}
else
{
return(param);
}
string[] pieces = exp.Split(s_sep);
if (pieces.Length > 1)
{
switch (pieces[0].Trim())
{
case "args":
string key = pieces[1].Trim();
if (context != null && context.BridgeRequest.Args.Contains(key))
{
return(context.BridgeRequest.Args[key]);
}
else
{
throw new ArgumentException("Failed to find object in Args: " + key + " for expression: " + param);
}
case "appsettings":
return(WebConfigurationManager.AppSettings[pieces[1].Trim()]);
case "resultschain":
if (context != null && pieces.Length == 3)
{
ICollection results = context.ResultsChain[pieces[1].Trim()] as ICollection;
if (results == null || results.Count == 0)
{
throw new ArgumentException("Results expression only works for a non empty Collection of IDictionary: " + param);
}
IEnumerator iterator = results.GetEnumerator();
iterator.MoveNext();
IDictionary dict = iterator.Current as IDictionary;
if (dict == null)
{
throw new ArgumentException("Results expression only works for a List of IDictionary: " + param);
}
string propertyKey = pieces[2].Trim();
string result = dict[propertyKey] as string;
if (result != null)
{
return(result);
}
else
{
throw new ArgumentException("Failed to parse expression: Could not find: " + propertyKey + " in results for: " + param);
}
}
break;
case "querystring":
return(HttpContext.Current.Request.QueryString[pieces[1].Trim()]);
default:
throw new ArgumentException("Unknown expression type: " + param);
}
}
throw new ArgumentException("Failed to parse expression, make sure its well formed: " + param);
}
public void Put(BridgeContext context) {
_cache[GetCacheKey(context)] = context.BridgeResponse.Response;
}
protected void BuildBridgeContext(string bridgePath, BridgeRequest request) {
_context = new BridgeContext(request, bridgePath);
}
// Helper function that resolve the config parameter values, client args, and expressions
private static void ResolveParameters(Dictionary<string, BridgeParameterInfo> parameterInfo, Dictionary<string, object> args, BridgeContext context) {
foreach (BridgeParameterInfo paramInfo in parameterInfo.Values) {
object paramValue = null;
// Fill in server side values as default always
if (paramInfo.Value != null) {
paramValue = paramInfo.Value;
}
// REVIEW: what happens if doesn't exist and no default, should probably throw here? or just use null (using null for now)
if (!paramInfo.ServerOnly) {
if (context.BridgeRequest.Args.Contains(paramInfo.Name)) {
paramValue = context.BridgeRequest.Args[paramInfo.Name];
}
}
// Handle expressions of form value= "% appsettings | querystring : key %"
string paramValueString = paramValue as string;
if (paramValueString != null) {
paramValue = TryParseExpression(paramValueString, context);
}
args[paramInfo.ServerName] = paramValue;
}
}
internal static object TryParseExpression(string param, BridgeContext context) {
string exp = param;
if (param.Length > MinimumExpressionLength && param.StartsWith("%", StringComparison.Ordinal) && param.EndsWith("%", StringComparison.Ordinal)) {
exp = param.Substring(1, param.Length - 2).Trim();
}
else {
return param;
}
string[] pieces = exp.Split(s_sep);
if (pieces.Length > 1) {
switch (pieces[0].Trim()) {
case "args":
string key = pieces[1].Trim();
if (context != null && context.BridgeRequest.Args.Contains(key)) {
return context.BridgeRequest.Args[key];
}
else {
throw new ArgumentException("Failed to find object in Args: " + key + " for expression: " + param);
}
case "appsettings":
return WebConfigurationManager.AppSettings[pieces[1].Trim()];
case "resultschain":
if (context != null && pieces.Length == 3) {
ICollection results = context.ResultsChain[pieces[1].Trim()] as ICollection;
if (results == null || results.Count == 0)
throw new ArgumentException("Results expression only works for a non empty Collection of IDictionary: " + param);
IEnumerator iterator = results.GetEnumerator();
iterator.MoveNext();
IDictionary dict = iterator.Current as IDictionary;
if (dict == null)
throw new ArgumentException("Results expression only works for a List of IDictionary: " + param);
string propertyKey = pieces[2].Trim();
string result = dict[propertyKey] as string;
if (result != null) {
return result;
}
else {
throw new ArgumentException("Failed to parse expression: Could not find: " + propertyKey + " in results for: " + param);
}
}
break;
case "querystring":
return HttpContext.Current.Request.QueryString[pieces[1].Trim()];
default:
throw new ArgumentException("Unknown expression type: " + param);
}
}
throw new ArgumentException("Failed to parse expression, make sure its well formed: " + param);
}
public void Put(BridgeContext context)
{
_cache[GetCacheKey(context)] = context.BridgeResponse.Response;
}
