// Process request and craft response.
public override CefReturnValue ProcessRequestAsync(IRequest request, ICallback callback)
{
if (request.Method == "OPTIONS")
{
// This is the CORS request, and that's good
base.StatusCode = 200;
// base.Headers.Add("Access-Control-Allow-Origin", "*");
base.Headers.Add("Access-Control-Allow-Methods", "GET,POST,PUT,OPTIONS");
base.Headers.Add("Access-Control-Allow-Headers", "Content-Type, Accept, authorization");
callback.Continue();
return(CefReturnValue.Continue);
}
var uri = new Uri(request.Url);
Console.WriteLine($"-----------------\r\n{request.Url}");
// Check the bearer header
if (!string.IsNullOrEmpty(_launchContext.Bearer))
{
string bearer = request.GetHeaderByName("authorization");
if (bearer != "Bearer " + _launchContext.Bearer)
{
base.StatusCode = (int)HttpStatusCode.Unauthorized;
callback.Continue();
return(CefReturnValue.Continue);
}
}
try
{
// This is a regular request
Hl7.Fhir.Rest.FhirClient server = new Hl7.Fhir.Rest.FhirClient("http://localhost:4178");
server.OnAfterResponse += (sender, args) =>
{
base.Charset = args.RawResponse.CharacterSet;
foreach (string header in args.RawResponse.Headers.AllKeys)
{
base.Headers.Add(header, args.RawResponse.Headers[header]);
}
};
server.PreferredFormat = Hl7.Fhir.Rest.ResourceFormat.Json;
string redirectedUrl = server.Endpoint.OriginalString.TrimEnd('/') + uri.PathAndQuery;
System.Diagnostics.Trace.WriteLine($"{redirectedUrl}");
var headers = new List <KeyValuePair <string, IEnumerable <string> > >();
ModelBaseInputs <IServiceProvider> requestDetails = new ModelBaseInputs <IServiceProvider>(null, null, request.Method, uri, new Uri($"https://{AuthProtocolSchemeHandlerFactory.FhirFacadeAddress(_launchContext)}"), null, headers, null);
if (request.Method == "GET")
{
if (uri.LocalPath == "/metadata")
{
_facade.GetConformance(requestDetails, Rest.SummaryType.False).ContinueWith <CapabilityStatement>(r =>
{
if (r.Exception != null)
{
System.Diagnostics.Trace.WriteLine($"Error: {r.Exception.Message}");
if (r.Exception.InnerException is Hl7.Fhir.Rest.FhirOperationException fe)
{
base.StatusCode = (int)fe.Status;
if (fe.Outcome != null)
{
base.Stream = new MemoryStream(new Hl7.Fhir.Serialization.FhirJsonSerializer(new Hl7.Fhir.Serialization.SerializerSettings()
{
Pretty = true
}).SerializeToBytes(fe.Outcome));
base.MimeType = "application/fhir+json";
}
callback.Continue();
System.Diagnostics.Trace.WriteLine($"Error (inner): {fe.Message}");
return(null);
}
}
base.StatusCode = 200;
// As per the documentation http://hl7.org/fhir/smart-app-launch/conformance/index.html
CapabilityStatement cs = r.Result;
// Update the security node with our internal security node
if (cs.Rest[0].Security == null)
{
cs.Rest[0].Security = new Hl7.Fhir.Model.CapabilityStatement.SecurityComponent();
}
Hl7.Fhir.Model.CapabilityStatement.SecurityComponent security = cs.Rest[0].Security;
if (!security.Service.Any(cc => cc.Coding.Any(c => c.System == "http://hl7.org/fhir/restful-security-service" && c.Code == "SMART-on-FHIR")))
{
security.Service.Add(new Hl7.Fhir.Model.CodeableConcept("http://hl7.org/fhir/restful-security-service", "SMART-on-FHIR"));
}
var extension = security.GetExtension("http://fhir-registry.smarthealthit.org/StructureDefinition/oauth-uris");
if (extension == null)
{
extension = new Extension()
{
Url = "http://fhir-registry.smarthealthit.org/StructureDefinition/oauth-uris"
};
security.Extension.Add(extension);
}
// remove the existing authentications, and put in our own
extension.Extension.Clear();
extension.AddExtension("token", new FhirUri($"https://{AuthProtocolSchemeHandlerFactory.AuthAddress(_launchContext)}/token"));
extension.AddExtension("authorize", new FhirUri($"https://{AuthProtocolSchemeHandlerFactory.AuthAddress(_launchContext)}/authorize"));
base.Stream = new MemoryStream(new Hl7.Fhir.Serialization.FhirJsonSerializer(new Hl7.Fhir.Serialization.SerializerSettings()
{
Pretty = true
}).SerializeToBytes(r.Result));
Console.WriteLine($"Success: {base.Stream.Length}");
base.MimeType = "application/fhir+json";
callback.Continue();
return(r.Result);
});
return(CefReturnValue.ContinueAsync);
}
if (!uri.LocalPath.StartsWith("/$") && !uri.LocalPath.StartsWith("/_") && uri.LocalPath.Length > 2)
{
// This is not an operation or history, so it must be a resource type
string resourceType = uri.LocalPath.Substring(1);
if (resourceType.Contains("/"))
{
resourceType = resourceType.Substring(0, resourceType.IndexOf("/"));
}
var rs = _facade.GetResourceService(requestDetails, resourceType);
if (rs == null)
{
System.Diagnostics.Trace.WriteLine($"Error: resource type not handled {resourceType}");
base.StatusCode = (int)HttpStatusCode.BadRequest;
// base.Stream = new MemoryStream(new Hl7.Fhir.Serialization.FhirJsonSerializer(new Hl7.Fhir.Serialization.SerializerSettings() { Pretty = true }).SerializeToBytes(fe.Outcome));
// base.MimeType = "application/fhir+json";
callback.Continue();
return(CefReturnValue.Continue);
}
// GET for a specific resource
ResourceIdentity ri = new ResourceIdentity(uri);
if (ri.IsRestResourceIdentity())
{
rs.Get(ri.Id, ri.VersionId, SummaryType.False).ContinueWith(r =>
{
if (r.Exception != null)
{
System.Diagnostics.Trace.WriteLine($"Error: {r.Exception.Message}");
if (r.Exception.InnerException is Hl7.Fhir.Rest.FhirOperationException fe)
{
base.StatusCode = (int)fe.Status;
if (fe.Outcome != null)
{
base.Stream = new MemoryStream(new Hl7.Fhir.Serialization.FhirJsonSerializer(new Hl7.Fhir.Serialization.SerializerSettings()
{
Pretty = true
}).SerializeToBytes(fe.Outcome));
base.MimeType = "application/fhir+json";
}
callback.Continue();
System.Diagnostics.Trace.WriteLine($"Error (inner): {fe.Message}");
return(null);
}
}
if (r.Result.HasAnnotation <HttpStatusCode>())
{
base.StatusCode = (int)r.Result.Annotation <HttpStatusCode>();
}
else
{
base.StatusCode = 200;
}
base.Stream = new MemoryStream(new Hl7.Fhir.Serialization.FhirJsonSerializer(new Hl7.Fhir.Serialization.SerializerSettings()
{
Pretty = true
}).SerializeToBytes(r.Result));
Console.WriteLine($"Success: {base.Stream.Length}");
base.MimeType = "application/fhir+json";
callback.Continue();
return(r.Result);
});
return(CefReturnValue.ContinueAsync);
}
// Search for the resource type
var parameters = TupledParameters(uri, SearchQueryParameterNames);
int?pagesize = GetIntParameter(uri, FhirParameter.COUNT);
var summary = GetSummaryParameter(uri);
rs.Search(parameters, pagesize, summary).ContinueWith(r =>
{
if (r.Exception != null)
{
System.Diagnostics.Trace.WriteLine($"Error: {r.Exception.Message}");
if (r.Exception.InnerException is Hl7.Fhir.Rest.FhirOperationException fe)
{
base.StatusCode = (int)fe.Status;
if (fe.Outcome != null)
{
base.Stream = new MemoryStream(new Hl7.Fhir.Serialization.FhirJsonSerializer(new Hl7.Fhir.Serialization.SerializerSettings()
{
Pretty = true
}).SerializeToBytes(fe.Outcome));
base.MimeType = "application/fhir+json";
}
callback.Continue();
System.Diagnostics.Trace.WriteLine($"Error (inner): {fe.Message}");
return(null);
}
}
if (r.Result.HasAnnotation <HttpStatusCode>())
{
base.StatusCode = (int)r.Result.Annotation <HttpStatusCode>();
}
else
{
base.StatusCode = 200;
}
base.Stream = new MemoryStream(new Hl7.Fhir.Serialization.FhirJsonSerializer(new Hl7.Fhir.Serialization.SerializerSettings()
{
Pretty = true
}).SerializeToBytes(r.Result));
Console.WriteLine($"Success: {base.Stream.Length}");
base.MimeType = "application/fhir+json";
callback.Continue();
return(r.Result);
});
return(CefReturnValue.ContinueAsync);
}
System.Threading.Tasks.Task <Hl7.Fhir.Model.Resource> t = server.GetAsync(redirectedUrl).ContinueWith <Hl7.Fhir.Model.Resource>(r =>
{
if (r.Exception != null)
{
System.Diagnostics.Trace.WriteLine($"Error: {r.Exception.Message}");
if (r.Exception.InnerException is Hl7.Fhir.Rest.FhirOperationException fe)
{
base.StatusCode = (int)fe.Status;
if (fe.Outcome != null)
{
base.Stream = new MemoryStream(new Hl7.Fhir.Serialization.FhirJsonSerializer(new Hl7.Fhir.Serialization.SerializerSettings()
{
Pretty = true
}).SerializeToBytes(fe.Outcome));
base.MimeType = "application/fhir+json";
}
callback.Continue();
System.Diagnostics.Trace.WriteLine($"Error (inner): {fe.Message}");
return(null);
}
}
base.StatusCode = 200;
if (r.Result is Hl7.Fhir.Model.CapabilityStatement cs)
{
// As per the documentation http://hl7.org/fhir/smart-app-launch/conformance/index.html
// Update the security node with our internal security node
if (cs.Rest[0].Security == null)
{
cs.Rest[0].Security = new Hl7.Fhir.Model.CapabilityStatement.SecurityComponent();
}
Hl7.Fhir.Model.CapabilityStatement.SecurityComponent security = cs.Rest[0].Security;
if (!security.Service.Any(cc => cc.Coding.Any(c => c.System == "http://hl7.org/fhir/restful-security-service" && c.Code == "SMART-on-FHIR")))
{
security.Service.Add(new Hl7.Fhir.Model.CodeableConcept("http://hl7.org/fhir/restful-security-service", "SMART-on-FHIR"));
}
var extension = security.GetExtension("http://fhir-registry.smarthealthit.org/StructureDefinition/oauth-uris");
if (extension == null)
{
extension = new Extension()
{
Url = "http://fhir-registry.smarthealthit.org/StructureDefinition/oauth-uris"
};
security.Extension.Add(extension);
}
// remove the existing authentications, and put in our own
extension.Extension.Clear();
extension.AddExtension("token", new FhirUri($"https://{AuthProtocolSchemeHandlerFactory.AuthAddress(_launchContext)}/token"));
extension.AddExtension("authorize", new FhirUri($"https://{AuthProtocolSchemeHandlerFactory.AuthAddress(_launchContext)}/authorize"));
}
base.Stream = new MemoryStream(new Hl7.Fhir.Serialization.FhirJsonSerializer(new Hl7.Fhir.Serialization.SerializerSettings()
{
Pretty = true
}).SerializeToBytes(r.Result));
Console.WriteLine($"Success: {base.Stream.Length}");
base.MimeType = "application/fhir+json";
callback.Continue();
return(r.Result);
});
}
if (request.Method == "POST")
{
if (uri.LocalPath == "/")
{
Bundle b = null;
if (request.PostData != null)
{
var data = request.PostData.Elements.FirstOrDefault();
var body = data.GetBody();
if (request.GetHeaderByName("Content-Type").Contains("xml"))
{
b = new Hl7.Fhir.Serialization.FhirXmlParser().Parse <Bundle>(body);
}
else
{
b = new Hl7.Fhir.Serialization.FhirJsonParser().Parse <Bundle>(body);
}
}
_facade.ProcessBatch(requestDetails, b).ContinueWith(r =>
{
if (r.Exception != null)
{
System.Diagnostics.Trace.WriteLine($"Error: {r.Exception.Message}");
if (r.Exception.InnerException is Hl7.Fhir.Rest.FhirOperationException fe)
{
base.StatusCode = (int)fe.Status;
if (fe.Outcome != null)
{
base.Stream = new MemoryStream(new Hl7.Fhir.Serialization.FhirJsonSerializer(new Hl7.Fhir.Serialization.SerializerSettings()
{
Pretty = true
}).SerializeToBytes(fe.Outcome));
base.MimeType = "application/fhir+json";
}
callback.Continue();
System.Diagnostics.Trace.WriteLine($"Error (inner): {fe.Message}");
return(null);
}
}
if (r.Result.HasAnnotation <HttpStatusCode>())
{
base.StatusCode = (int)r.Result.Annotation <HttpStatusCode>();
}
else
{
base.StatusCode = 200;
}
base.Stream = new MemoryStream(new Hl7.Fhir.Serialization.FhirJsonSerializer(new Hl7.Fhir.Serialization.SerializerSettings()
{
Pretty = true
}).SerializeToBytes(r.Result));
Console.WriteLine($"Success: {base.Stream.Length}");
base.MimeType = "application/fhir+json";
callback.Continue();
return(r.Result);
});
return(CefReturnValue.ContinueAsync);
}
System.Net.Http.HttpClient client = new System.Net.Http.HttpClient();
client.DefaultRequestHeaders.Add("Accept", request.GetHeaderByName("Accept"));
// client.DefaultRequestHeaders.Add("Content-Type", request.GetHeaderByName("Content-Type"));
HttpContent content = null;
if (request.PostData != null)
{
var data = request.PostData.Elements.FirstOrDefault();
var body = data.GetBody();
content = new System.Net.Http.StringContent(body, System.Text.Encoding.UTF8, request.GetHeaderByName("Content-Type"));
}
else
{
content = new System.Net.Http.StreamContent(null);
}
client.PostAsync(redirectedUrl, content).ContinueWith((System.Threading.Tasks.Task <HttpResponseMessage> r) =>
{
if (r.Exception != null)
{
Console.WriteLine($"Error: {r.Exception.Message}");
//if (r.Exception.InnerException is Hl7.Fhir.Rest.FhirOperationException fe)
//{
// base.StatusCode = (int)fe.Status;
// if (fe.Outcome != null)
// base.Stream = new MemoryStream(r.Result.Content.ReadAsStringAsync().GetAwaiter().GetResult());
// callback.Continue();
// System.Diagnostics.Trace.WriteLine($"Error (inner): {fe.Message}");
// return;
//}
}
base.StatusCode = (int)r.Result.StatusCode;
base.Stream = r.Result.Content.ReadAsStreamAsync().GetAwaiter().GetResult();
Console.WriteLine($"Success: {base.Stream.Length}");
base.MimeType = r.Result.Content.Headers.ContentType.MediaType;
callback.Continue();
return;
});
}
if (request.Method == "PUT")
{
System.Net.Http.HttpClient client = new System.Net.Http.HttpClient();
client.DefaultRequestHeaders.Add("Accept", request.GetHeaderByName("Accept"));
// client.DefaultRequestHeaders.Add("Content-Type", request.GetHeaderByName("Content-Type"));
HttpContent content = null;
if (request.PostData != null)
{
var data = request.PostData.Elements.FirstOrDefault();
var body = data.GetBody();
content = new System.Net.Http.StringContent(body, System.Text.Encoding.UTF8, request.GetHeaderByName("Content-Type"));
}
else
{
content = new System.Net.Http.StreamContent(null);
}
client.PutAsync(redirectedUrl, content).ContinueWith((System.Threading.Tasks.Task <HttpResponseMessage> r) =>
{
if (r.Exception != null)
{
Console.WriteLine($"Error: {r.Exception.Message}");
//if (r.Exception.InnerException is Hl7.Fhir.Rest.FhirOperationException fe)
//{
// base.StatusCode = (int)fe.Status;
// if (fe.Outcome != null)
// base.Stream = new MemoryStream(r.Result.Content.ReadAsStringAsync().GetAwaiter().GetResult());
// callback.Continue();
// System.Diagnostics.Trace.WriteLine($"Error (inner): {fe.Message}");
// return;
//}
}
base.StatusCode = (int)r.Result.StatusCode;
base.Stream = r.Result.Content.ReadAsStreamAsync().GetAwaiter().GetResult();
Console.WriteLine($"Success: {base.Stream.Length}");
base.MimeType = r.Result.Content.Headers.ContentType.MediaType;
callback.Continue();
return;
});
}
return(CefReturnValue.ContinueAsync);
}
catch (Exception ex)
{
Console.WriteLine($"{ex.Message}");
callback.Dispose();
return(CefReturnValue.Cancel);
}
}