当我尝试使用.NET FHIR API向asp.net Web API 2服务器发送POST / PUT请求时,出现错误消息:
Hl7.Fhir.Rest.FhirOperationException:由于操作失败,
客户端错误(UnsupportedMediaType)。身体没有任何内容。
1)我需要创建某种MediaType处理程序/格式化程序吗?
2)是否有一个开放源代码服务器,其中的代码实现了.NET FHIR API的最佳实践?
我看着Fiddler,看来这是客户端在体内发送正确的JSON
fhirClient = new FhirClient(serverUrl);
fhirClient.PreferredFormat = ResourceFormat.Json;
Patient patient = new Patient();
//fill patient
var response = fhirClient.Update(patient);
...
// Web api 2服务器:
WebApiConfig.cs:
config.Formatters.JsonFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("application/fhir+json"));
我尝试过:
[HttpPut]
public void Update([FromBody] Resource resource, string id = null)
{
// updating logic
}
//or
[HttpPut]
public void Update(Resource resource, string id = null)
{
// updating logic
}
但是,当我尝试
[HttpPut]
public void Update([FromBody] object resource, string id = null)
{
我可以在“对象”内部看到一个反序列化的患者,并使用jsonParser将其取回
答案 0 :(得分:0)
似乎,我必须编写自己的Fhir MediaTypeFormatter 我用Google搜索并发现了this code:
public class JsonFhirFormatter : FhirMediaTypeFormatter
{
private readonly FhirJsonParser _parser = new FhirJsonParser();
private readonly FhirJsonSerializer _serializer = new FhirJsonSerializer();
public JsonFhirFormatter() : base()
{
foreach (var mediaType in ContentType.JSON_CONTENT_HEADERS)
SupportedMediaTypes.Add(new MediaTypeHeaderValue(mediaType));
}
public override void SetDefaultContentHeaders(Type type, HttpContentHeaders headers, MediaTypeHeaderValue mediaType)
{
base.SetDefaultContentHeaders(type, headers, mediaType);
headers.ContentType = FhirMediaType.GetMediaTypeHeaderValue(type, ResourceFormat.Json);
}
public override Task<object> ReadFromStreamAsync(Type type, Stream readStream, HttpContent content, IFormatterLogger formatterLogger)
{
try
{
var body = base.ReadBodyFromStream(readStream, content);
if (typeof(Resource).IsAssignableFrom(type))
{
Resource resource = _parser.Parse<Resource>(body);
return Task.FromResult<object>(resource);
}
else
{
throw Error.Internal("Cannot read unsupported type {0} from body", type.Name);
}
}
catch (FormatException exception)
{
throw Error.BadRequest("Body parsing failed: " + exception.Message);
}
}
public override Task WriteToStreamAsync(Type type, object value, Stream writeStream, HttpContent content, TransportContext transportContext)
{
using(StreamWriter streamwriter = new StreamWriter(writeStream))
using (JsonWriter writer = new JsonTextWriter(streamwriter))
{
SummaryType summary = requestMessage.RequestSummary();
if (type == typeof(OperationOutcome))
{
Resource resource = (Resource)value;
_serializer.Serialize(resource, writer, summary);
}
else if (typeof(Resource).IsAssignableFrom(type))
{
Resource resource = (Resource)value;
_serializer.Serialize(resource, writer, summary);
}
else if (typeof(FhirResponse).IsAssignableFrom(type))
{
FhirResponse response = (value as FhirResponse);
if (response.HasBody)
{
_serializer.Serialize(response.Resource, writer, summary);
}
}
}
return Task.CompletedTask;
}
}
并将其注册到Global.asax
答案 1 :(得分:0)
实际上,也请参见此处:HL7 FHIR serialisation to json in asp.net web api-该答案基于您在上面找到的代码。
答案 2 :(得分:0)
其中有几个选项,包括github上的开源fhir-net-web-api项目。 有一个aspnetcore版本和一个完整的框架版本。 检查其中的示例项目以了解如何使用它们。