/// <summary>
/// Serialize the request for the operation
/// </summary>
public void DeserializeRequest(EndpointOperation operation, RestRequestMessage request, object[] parameters)
{
try
{
var httpRequest = RestOperationContext.Current.IncomingRequest;
string contentTypeHeader = httpRequest.Headers["Content-Type"];
ContentType contentType = null;
if (!String.IsNullOrEmpty(contentTypeHeader))
{
contentType = new ContentType(contentTypeHeader);
}
for (int pNumber = 0; pNumber < parameters.Length; pNumber++)
{
var parm = operation.Description.InvokeMethod.GetParameters()[pNumber];
// TODO: Look for MessageFormatAttribute for override
// Simple parameter
if (parameters[pNumber] != null)
{
continue; // dispatcher already populated
}
else
{
switch (contentType.MediaType)
{
case "application/xml":
if (!this.m_serializers.TryGetValue(parm.ParameterType, out XmlSerializer serializer))
{
serializer = new XmlSerializer(parm.ParameterType);
this.m_serializers.TryAdd(parm.ParameterType, serializer);
}
var requestObject = serializer.Deserialize(request.Body);
parameters[pNumber] = requestObject;
break;
case "application/json":
using (var sr = new StreamReader(request.Body))
{
JsonSerializer jsz = new JsonSerializer()
{
TypeNameAssemblyFormatHandling = TypeNameAssemblyFormatHandling.Simple,
TypeNameHandling = TypeNameHandling.All
};
jsz.Converters.Add(new StringEnumConverter());
var dserType = parm.ParameterType;
parameters[pNumber] = jsz.Deserialize(sr, dserType);
}
break;
case "application/octet-stream":
parameters[pNumber] = request.Body;
break;
case "application/x-www-form-urlencoded":
NameValueCollection nvc = new NameValueCollection();
using (var sr = new StreamReader(request.Body))
{
var ptext = sr.ReadToEnd();
var parms = ptext.Split('&');
foreach (var p in parms)
{
var parmData = p.Split('=');
parmData[1] += new string('=', parmData.Length - 2);
nvc.Add(WebUtility.UrlDecode(parmData[0]), WebUtility.UrlDecode(parmData[1]));
}
}
parameters[pNumber] = nvc;
break;
default:
throw new InvalidOperationException("Invalid request format");
}
}
}
}
catch (Exception e)
{
this.m_traceSource.TraceEvent(TraceEventType.Error, e.HResult, e.ToString());
throw;
}
}
/// <summary>
/// Creats a new operation dispatcher
/// </summary>
public OperationDispatcher(EndpointOperation endpointOperation)
{
this.m_endpointOperation = endpointOperation;
var match = this.m_templateParser.Match(endpointOperation.Description.UriTemplate);
var regexBuilder = new StringBuilder("^");
this.DispatchFormatter = new DefaultDispatchFormatter();
Type[] parmTypes = endpointOperation.Description.InvokeMethod.GetParameters().Select(o => o.ParameterType).ToArray();
m_regexGroupNames = new string[parmTypes.Length];
int parmCount = 0;
while (match.Success)
{
switch (match.Groups[1].Value[0])
{
case '{': // parameter
if (parmTypes.Length < parmCount)
{
throw new InvalidOperationException($"REST method accepts {parmTypes.Length} parameters but route specifies more");
}
m_regexGroupNames[parmCount] = match.Groups[1].Value;
var ptype = parmTypes[parmCount++];
switch (ptype.Name.ToLowerInvariant())
{
case "string":
if (match.Groups[1].Value.StartsWith("{*")) // match all
{
m_regexGroupNames[parmCount - 1] = "{" + m_regexGroupNames[parmCount - 1].Substring(2);
regexBuilder.Append(@"(.*?)");
}
else
{
regexBuilder.Append(@"([A-Za-z0-9_\-%\.\~\\]*?)");
}
break;
case "int32":
regexBuilder.Append("(\\d*?)");
break;
case "guid":
regexBuilder.Append("([a-f0-9]{8}-(?:[a-f0-9]{4}-){3}[a-f0-9]{12})");
break;
default:
throw new InvalidOperationException($"Cannot use parameter type {ptype.Name} on route");
}
break;
case '*': // anything
regexBuilder.Append(".*");
break;
default:
regexBuilder.Append(match.Groups[1].Value.Replace("$", "\\$"));
break;
}
match = match.NextMatch();
}
if (regexBuilder[1] == '/') // starting / is optional
{
regexBuilder.Insert(2, "?");
}
if (regexBuilder[regexBuilder.Length - 1] == '/') // ending with /? is optional
{
regexBuilder.Append("?");
}
regexBuilder.Append("$");
this.m_regexGroupNames = this.m_regexGroupNames.Where(o => o != null).ToArray();
this.m_traceSource.TraceEvent(TraceEventType.Verbose, 0, "Operation {0} will be bound to {1}", endpointOperation.Description.InvokeMethod, regexBuilder);
this.m_dispatchRegex = new Regex(regexBuilder.ToString(), RegexOptions.IgnoreCase);
}
