Handle invalid HTTP responses better

org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/SimpleHTTPClient.java

@@ -71,8 +71,12 @@ public class SimpleHTTPClient {
     public void checkThrowException() throws IOException {
       if (code >= 300) {
         String filename = Utilities.path("[tmp]", "fhir-http-"+(++counter)+".log");
-        TextFile.bytesToFile(content, filename);
-        throw new IOException("Invalid HTTP response "+code+" from "+source+" ("+message+") (content in "+filename+")");
+        if (content.length == 0) {
+          throw new IOException("Invalid HTTP response "+code+" from "+source+" ("+message+") (no content)");          
+        } else {
+          TextFile.bytesToFile(content, filename);
+          throw new IOException("Invalid HTTP response "+code+" from "+source+" ("+message+") (content in "+filename+")");
+        }
       }      
     }    
   }

org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/ipa/IPAValidator.java

@@ -0,0 +1,84 @@
+package org.hl7.fhir.validation.ipa;
+
+import java.util.List;
+
+import org.hl7.fhir.r4.model.Patient;
+import org.hl7.fhir.validation.instance.InstanceValidator;
+
+/**
+ * You give this validator three parameters:
+ *   URL of server
+ *   access token for the server (most be already logged in)
+ *   patient ID - the patient ID that was authorised by the log in
+ *   
+ * @author grahamegrieve
+ *
+ */
+public class IPAValidator {
+
+  private String address;
+  private String token;
+  private String urn;
+  private InstanceValidator validator;
+  
+  public IPAValidator(String address, String token, String urn, InstanceValidator validator) {
+    super();
+    this.address = address;
+    this.token = token;
+    this.urn = urn;
+    this.validator = validator;
+  }
+  
+  public String getAddress() {
+    return address;
+  }
+  public void setAddress(String address) {
+    this.address = address;
+  }
+  public String getToken() {
+    return token;
+  }
+  public void setToken(String token) {
+    this.token = token;
+  }
+  public String getUrn() {
+    return urn;
+  }
+  public void setUrn(String urn) {
+    this.urn = urn;
+  }
+  public InstanceValidator getValidator() {
+    return validator;
+  }
+  public void setValidator(InstanceValidator validator) {
+    this.validator = validator;
+  }
+
+  public void validate() {
+    List<Patient> patients = searchPatients();
+    // check list of patients that have access to
+    // require that at least one of the patients matches the URL
+    // validate all resources and links
+    // validate search parameters
+    // check self links
+    
+//    AllergyIntolerance  patient patient+clinical-status
+//    Condition patient patient+category, patient+clinical-status, patient+code, patient+onset-date, patient+category+clinical_status
+//    DocumentReference _id, patient, patient+category, patient+type  patient+category+date, patient+status, patient+type+period
+//    Immunization  patient patient+date, patient+status
+//    MedicationRequest patient patient+intent, patient+intent+authoredon, patient+intent+status
+//    MedicationStatement subject subject+status
+//    Observation patient+category, patient+code, patient+category+date patient+category+status, patient+code+date
+//    Patient _id, identifier birthdate, family, gender, given, name, family+gender, birthdate+family, birthdate+name, gender+name
+    
+    
+    
+    
+    
+  }
+
+  private List<Patient> searchPatients() {
+    
+    return null;
+  }
+}