api: Add support for necessary CORS headers.

api/src/main/nim/personal_measure_apipkg/api.nim

@@ -20,7 +20,7 @@ proc newSession*(user: User): Session =
 
 template halt(code: HttpCode,
               headers: RawHeaders,
-              content: string): typed =
+              content: string) =
   ## Immediately replies with the specified request. This means any further
   ## code will not be executed after calling this template in the current
   ## route.
@@ -43,7 +43,8 @@ template jsonResp(code: HttpCode, body: string = "", headersToSend: RawHeaders =
       @{
         "Access-Control-Allow-Origin": reqOrigin,
         "Access-Control-Allow-Credentials": "true",
-        "Access-Control-Allow-Methods": $(request.reqMethod)
+        "Access-Control-Allow-Methods": $(request.reqMethod),
+        "Access-Control-Allow-Headers": "DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization"
       }
     else: @{:}
 
@@ -68,11 +69,6 @@ template statusResp(code: HttpCode, details: string = "", headersToSend: RawHead
     }),
     headersToSend)
 
-template execptionResp(ex: ref Exception, details: string = ""): void =
-  when not defined(release): debug ex.getStackTrace()
-  error details & ":\n" & ex.msg
-  statusResp(Http500)
-
 # internal JSON parsing utils
 proc getIfExists(n: JsonNode, key: string): JsonNode =
   ## convenience method to get a key from a JObject or return null