Interface IServerInterceptor

All Known Subinterfaces:
IServerOperationInterceptor
All Known Implementing Classes:
BanUnsupportedHttpMethodsInterceptor, CorsInterceptor, InterceptorAdapter, ServerOperationInterceptorAdapter, VerboseLoggingInterceptor

public interface IServerInterceptor
Provides methods to intercept requests and responses. Note that implementations of this interface may wish to use InterceptorAdapter in order to not need to implement every method.

See: See the server interceptor documentation for more information on how to use this class.

Note that unless otherwise stated, it is possible to throw any subclass of BaseServerResponseException from any interceptor method.
  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Interface
    Description
    static class 
    Deprecated.
    This class doesn't bring anything that can't be done with RequestDetails.
  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    handleException​(RequestDetails theRequestDetails, ca.uhn.fhir.rest.server.exceptions.BaseServerResponseException theException, javax.servlet.http.HttpServletRequest theServletRequest, javax.servlet.http.HttpServletResponse theServletResponse)
    This method is called upon any exception being thrown within the server's request processing code.
    boolean
    incomingRequestPostProcessed​(RequestDetails theRequestDetails, javax.servlet.http.HttpServletRequest theRequest, javax.servlet.http.HttpServletResponse theResponse)
    This method is called just before the actual implementing server method is invoked.
    void
    incomingRequestPreHandled​(ca.uhn.fhir.rest.api.RestOperationTypeEnum theOperation, IServerInterceptor.ActionRequestDetails theProcessedRequest)
    Invoked before an incoming request is processed.
    boolean
    incomingRequestPreProcessed​(javax.servlet.http.HttpServletRequest theRequest, javax.servlet.http.HttpServletResponse theResponse)
    This method is called before any other processing takes place for each incoming request.
    boolean
    outgoingResponse​(RequestDetails theRequestDetails)
    Deprecated.
    As of HAPI FHIR 3.2.0, this method is deprecated and will be removed in a future version of HAPI FHIR.
    boolean
    outgoingResponse​(RequestDetails theRequestDetails, ca.uhn.fhir.model.api.TagList theResponseObject)
    Deprecated.
    As of HAPI FHIR 3.2.0, this method is deprecated and will be removed in a future version of HAPI FHIR.
    boolean
    outgoingResponse​(RequestDetails theRequestDetails, ca.uhn.fhir.model.api.TagList theResponseObject, javax.servlet.http.HttpServletRequest theServletRequest, javax.servlet.http.HttpServletResponse theServletResponse)
    Deprecated.
    As of HAPI FHIR 3.2.0, this method is deprecated and will be removed in a future version of HAPI FHIR.
    boolean
    outgoingResponse​(RequestDetails theRequestDetails, ResponseDetails theResponseDetails, javax.servlet.http.HttpServletRequest theServletRequest, javax.servlet.http.HttpServletResponse theServletResponse)
    This method is called after the server implementation method has been called, but before any attempt to stream the response back to the client.
    boolean
    outgoingResponse​(RequestDetails theRequestDetails, javax.servlet.http.HttpServletRequest theServletRequest, javax.servlet.http.HttpServletResponse theServletResponse)
    Deprecated.
    As of HAPI FHIR 3.2.0, this method is deprecated and will be removed in a future version of HAPI FHIR.
    boolean
    outgoingResponse​(RequestDetails theRequestDetails, org.hl7.fhir.instance.model.api.IBaseResource theResponseObject)
    Deprecated.
    As of HAPI FHIR 3.2.0, this method is deprecated and will be removed in a future version of HAPI FHIR.
    boolean
    outgoingResponse​(RequestDetails theRequestDetails, org.hl7.fhir.instance.model.api.IBaseResource theResponseObject, javax.servlet.http.HttpServletRequest theServletRequest, javax.servlet.http.HttpServletResponse theServletResponse)
    Deprecated.
    As of HAPI FHIR 3.3.0, this method has been deprecated in favour of outgoingResponse(RequestDetails, ResponseDetails, HttpServletRequest, HttpServletResponse) and will be removed in a future version of HAPI FHIR.
    ca.uhn.fhir.rest.server.exceptions.BaseServerResponseException
    preProcessOutgoingException​(RequestDetails theRequestDetails, Throwable theException, javax.servlet.http.HttpServletRequest theServletRequest)
    This method is called upon any exception being thrown within the server's request processing code.
    void
    This method is called after all processing is completed for a request, but only if the request completes normally (i.e.
  • Method Details

    • handleException

      boolean handleException(RequestDetails theRequestDetails, ca.uhn.fhir.rest.server.exceptions.BaseServerResponseException theException, javax.servlet.http.HttpServletRequest theServletRequest, javax.servlet.http.HttpServletResponse theServletResponse) throws javax.servlet.ServletException, IOException
      This method is called upon any exception being thrown within the server's request processing code. This includes any exceptions thrown within resource provider methods (e.g. Search and Read methods) as well as any runtime exceptions thrown by the server itself. This also includes any AuthenticationExceptions thrown.

      Implementations of this method may choose to ignore/log/count/etc exceptions, and return true. In this case, processing will continue, and the server will automatically generate an OperationOutcome. Implementations may also choose to provide their own response to the client. In this case, they should return false, to indicate that they have handled the request and processing should stop.

      Parameters:
      theRequestDetails - A bean containing details about the request that is about to be processed, including details such as the resource type and logical ID (if any) and other FHIR-specific aspects of the request which have been pulled out of the servlet request. Note that the bean properties are not all guaranteed to be populated, depending on how early during processing the exception occurred.
      theServletRequest - The incoming request
      theServletResponse - The response. Note that interceptors may choose to provide a response (i.e. by calling ServletResponse.getWriter()) but in that case it is important to return false to indicate that the server itself should not also provide a response.
      Returns:
      Return true if processing should continue normally. This is generally the right thing to do. If your interceptor is providing a response rather than letting HAPI handle the response normally, you must return false. In this case, no further processing will occur and no further interceptors will be called.
      Throws:
      javax.servlet.ServletException - If this exception is thrown, it will be re-thrown up to the container for handling.
      IOException - If this exception is thrown, it will be re-thrown up to the container for handling.
    • incomingRequestPostProcessed

      boolean incomingRequestPostProcessed(RequestDetails theRequestDetails, javax.servlet.http.HttpServletRequest theRequest, javax.servlet.http.HttpServletResponse theResponse) throws ca.uhn.fhir.rest.server.exceptions.AuthenticationException
      This method is called just before the actual implementing server method is invoked.
      Parameters:
      theRequestDetails - A bean containing details about the request that is about to be processed, including details such as the resource type and logical ID (if any) and other FHIR-specific aspects of the request which have been pulled out of the servlet request.
      theRequest - The incoming request
      theResponse - The response. Note that interceptors may choose to provide a response (i.e. by calling ServletResponse.getWriter()) but in that case it is important to return false to indicate that the server itself should not also provide a response.
      Returns:
      Return true if processing should continue normally. This is generally the right thing to do. If your interceptor is providing a response rather than letting HAPI handle the response normally, you must return false. In this case, no further processing will occur and no further interceptors will be called.
      Throws:
      ca.uhn.fhir.rest.server.exceptions.AuthenticationException - This exception may be thrown to indicate that the interceptor has detected an unauthorized access attempt. If thrown, processing will stop and an HTTP 401 will be returned to the client.
    • incomingRequestPreHandled

      void incomingRequestPreHandled(ca.uhn.fhir.rest.api.RestOperationTypeEnum theOperation, IServerInterceptor.ActionRequestDetails theProcessedRequest)
      Invoked before an incoming request is processed. Note that this method is called after the server has begin preparing the response to the incoming client request. As such, it is not able to supply a response to the incoming request in the way that incomingRequestPreHandled(RestOperationTypeEnum, ActionRequestDetails) and incomingRequestPostProcessed(RequestDetails, HttpServletRequest, HttpServletResponse) are.

      This method may however throw a subclass of BaseServerResponseException, and processing will be aborted with an appropriate error returned to the client.

      Parameters:
      theOperation - The type of operation that the FHIR server has determined that the client is trying to invoke
      theProcessedRequest - An object which will be populated with the details which were extracted from the raw request by the server, e.g. the FHIR operation type and the parsed resource body (if any).
    • incomingRequestPreProcessed

      boolean incomingRequestPreProcessed(javax.servlet.http.HttpServletRequest theRequest, javax.servlet.http.HttpServletResponse theResponse)
      This method is called before any other processing takes place for each incoming request. It may be used to provide alternate handling for some requests, or to screen requests before they are handled, etc.

      Note that any exceptions thrown by this method will not be trapped by HAPI (they will be passed up to the server)

      Parameters:
      theRequest - The incoming request
      theResponse - The response. Note that interceptors may choose to provide a response (i.e. by calling ServletResponse.getWriter()) but in that case it is important to return false to indicate that the server itself should not also provide a response.
      Returns:
      Return true if processing should continue normally. This is generally the right thing to do. If your interceptor is providing a response rather than letting HAPI handle the response normally, you must return false. In this case, no further processing will occur and no further interceptors will be called.
    • outgoingResponse

      @Deprecated boolean outgoingResponse(RequestDetails theRequestDetails)
      Deprecated.
      As of HAPI FHIR 3.2.0, this method is deprecated and will be removed in a future version of HAPI FHIR.
    • outgoingResponse

      @Deprecated boolean outgoingResponse(RequestDetails theRequestDetails, javax.servlet.http.HttpServletRequest theServletRequest, javax.servlet.http.HttpServletResponse theServletResponse) throws ca.uhn.fhir.rest.server.exceptions.AuthenticationException
      Deprecated.
      As of HAPI FHIR 3.2.0, this method is deprecated and will be removed in a future version of HAPI FHIR.
      Throws:
      ca.uhn.fhir.rest.server.exceptions.AuthenticationException
    • outgoingResponse

      @Deprecated boolean outgoingResponse(RequestDetails theRequestDetails, org.hl7.fhir.instance.model.api.IBaseResource theResponseObject)
      Deprecated.
      As of HAPI FHIR 3.2.0, this method is deprecated and will be removed in a future version of HAPI FHIR.
    • outgoingResponse

      @Deprecated boolean outgoingResponse(RequestDetails theRequestDetails, org.hl7.fhir.instance.model.api.IBaseResource theResponseObject, javax.servlet.http.HttpServletRequest theServletRequest, javax.servlet.http.HttpServletResponse theServletResponse) throws ca.uhn.fhir.rest.server.exceptions.AuthenticationException
      Deprecated.
      As of HAPI FHIR 3.3.0, this method has been deprecated in favour of outgoingResponse(RequestDetails, ResponseDetails, HttpServletRequest, HttpServletResponse) and will be removed in a future version of HAPI FHIR.
      This method is called after the server implementation method has been called, but before any attempt to stream the response back to the client.
      Parameters:
      theRequestDetails - A bean containing details about the request that is about to be processed, including details such as the resource type and logical ID (if any) and other FHIR-specific aspects of the request which have been pulled out of the servlet request.
      theResponseObject - The actual object which is being streamed to the client as a response. This may be null if the response does not include a resource.
      theServletRequest - The incoming request
      theServletResponse - The response. Note that interceptors may choose to provide a response (i.e. by calling ServletResponse.getWriter()) but in that case it is important to return false to indicate that the server itself should not also provide a response.
      Returns:
      Return true if processing should continue normally. This is generally the right thing to do. If your interceptor is providing a response rather than letting HAPI handle the response normally, you must return false. In this case, no further processing will occur and no further interceptors will be called.
      Throws:
      ca.uhn.fhir.rest.server.exceptions.AuthenticationException - This exception may be thrown to indicate that the interceptor has detected an unauthorized access attempt. If thrown, processing will stop and an HTTP 401 will be returned to the client.
    • outgoingResponse

      boolean outgoingResponse(RequestDetails theRequestDetails, ResponseDetails theResponseDetails, javax.servlet.http.HttpServletRequest theServletRequest, javax.servlet.http.HttpServletResponse theServletResponse) throws ca.uhn.fhir.rest.server.exceptions.AuthenticationException
      This method is called after the server implementation method has been called, but before any attempt to stream the response back to the client.
      Parameters:
      theRequestDetails - A bean containing details about the request that is about to be processed, including details such as the resource type and logical ID (if any) and other FHIR-specific aspects of the request which have been pulled out of the servlet request.
      theResponseDetails - This object contains details about the response, including the actual payload that will be returned
      theServletRequest - The incoming request
      theServletResponse - The response. Note that interceptors may choose to provide a response (i.e. by calling ServletResponse.getWriter()) but in that case it is important to return false to indicate that the server itself should not also provide a response.
      Returns:
      Return true if processing should continue normally. This is generally the right thing to do. If your interceptor is providing a response rather than letting HAPI handle the response normally, you must return false. In this case, no further processing will occur and no further interceptors will be called.
      Throws:
      ca.uhn.fhir.rest.server.exceptions.AuthenticationException - This exception may be thrown to indicate that the interceptor has detected an unauthorized access attempt. If thrown, processing will stop and an HTTP 401 will be returned to the client.
    • outgoingResponse

      @Deprecated boolean outgoingResponse(RequestDetails theRequestDetails, ca.uhn.fhir.model.api.TagList theResponseObject)
      Deprecated.
      As of HAPI FHIR 3.2.0, this method is deprecated and will be removed in a future version of HAPI FHIR.
    • outgoingResponse

      @Deprecated boolean outgoingResponse(RequestDetails theRequestDetails, ca.uhn.fhir.model.api.TagList theResponseObject, javax.servlet.http.HttpServletRequest theServletRequest, javax.servlet.http.HttpServletResponse theServletResponse) throws ca.uhn.fhir.rest.server.exceptions.AuthenticationException
      Deprecated.
      As of HAPI FHIR 3.2.0, this method is deprecated and will be removed in a future version of HAPI FHIR.
      Throws:
      ca.uhn.fhir.rest.server.exceptions.AuthenticationException
    • preProcessOutgoingException

      ca.uhn.fhir.rest.server.exceptions.BaseServerResponseException preProcessOutgoingException(RequestDetails theRequestDetails, Throwable theException, javax.servlet.http.HttpServletRequest theServletRequest) throws javax.servlet.ServletException
      This method is called upon any exception being thrown within the server's request processing code. This includes any exceptions thrown within resource provider methods (e.g. Search and Read methods) as well as any runtime exceptions thrown by the server itself. This method is invoked for each interceptor (until one of them returns a non-null response or the end of the list is reached), after which handleException(RequestDetails, BaseServerResponseException, HttpServletRequest, HttpServletResponse) is called for each interceptor.

      This may be used to add an OperationOutcome to a response, or to convert between exception types for any reason.

      Implementations of this method may choose to ignore/log/count/etc exceptions, and return null. In this case, processing will continue, and the server will automatically generate an OperationOutcome. Implementations may also choose to provide their own response to the client. In this case, they should return a non-null, to indicate that they have handled the request and processing should stop.

      Returns:
      Returns the new exception to use for processing, or null if this interceptor is not trying to modify the exception. For example, if this interceptor has nothing to do with exception processing, it should always return null. If this interceptor adds an OperationOutcome to the exception, it should return an exception.
      Throws:
      javax.servlet.ServletException
    • processingCompletedNormally

      This method is called after all processing is completed for a request, but only if the request completes normally (i.e. no exception is thrown).

      This method should not throw any exceptions. Any exception that is thrown by this method will be logged, but otherwise not acted upon.

      Note that this individual interceptors will have this method called in the reverse order from the order in which the interceptors were registered with the server.

      Parameters:
      theRequestDetails - The request itself