add create resource support. re-do request handling a bit to handle http 201 returns which include a "location" header

src/clj_hl7_fhir/core.clj

@@ -13,11 +13,16 @@
   (let [query (map->query-string params)
         url   (build-url base-url resource-url query)]
     (try
-      (case type
-        :get    (http-get-json url)
-        :post   (http-post-json url body)
-        :put    (http-put-json url body)
-        :delete (http-delete-json url body))
+      (let [response (case type
+                       :get    (http-get-json url)
+                       :post   (http-post-json url body)
+                       :put    (http-put-json url body)
+                       :delete (http-delete-json url body))]
+        (-> (if (= 201 (:status response))
+              (http-get-json (get-in response [:headers "Location"]))
+              response)
+            :body
+            (json/parse-string true)))
       (catch ExceptionInfo ex
         (let [{:keys [status body headers]} (:object (ex-data ex))
               fhir-resource-response?       (.contains (get headers "Content-Type") "application/json+fhir")]
@@ -262,6 +267,15 @@
   (fetch-all
     (search base-url type where params)))
 
+(defn create
+  [base-url type resource]
+  (let [resource-name  (->fhir-resource-name type)
+        uri-components ["/" resource-name]]
+    (fhir-request :post
+      base-url
+      (apply join-paths uri-components)
+      :body resource)))
+
 ;(def server-url "http://fhir.healthintersections.com.au/open")
 ;(def server-url "http://spark.furore.com/fhir")
 (def server-url "http://uhnvesb01d.uhn.on.ca:25180/hapi-fhir-jpaserver/base")

src/clj_hl7_fhir/util.clj

@@ -77,9 +77,7 @@
       (str)))
 
 (defn- http-request [f url & [params]]
-  (-> (f url (merge {:accept "application/json+fhir"} params))
-      :body
-      (json/parse-string true)))
+  (f url (merge {:accept "application/json+fhir"} params)))
 
 (defn http-get-json [url]
   (http-request http/get url))