minor optimization for asynchttpserver.nim

lib/pure/asynchttpserver.nim

@@ -128,20 +128,6 @@ proc parseProtocol(protocol: string): tuple[orig: string, major, minor: int] =
 proc sendStatus(client: AsyncSocket, status: string): Future[void] =
   client.send("HTTP/1.1 " & status & "\c\L\c\L")
 
-proc parseUppercaseMethod(name: string): HttpMethod =
-  result =
-    case name
-    of "GET": HttpGet
-    of "POST": HttpPost
-    of "HEAD": HttpHead
-    of "PUT": HttpPut
-    of "DELETE": HttpDelete
-    of "PATCH": HttpPatch
-    of "OPTIONS": HttpOptions
-    of "CONNECT": HttpConnect
-    of "TRACE": HttpTrace
-    else: raise newException(ValueError, "Invalid HTTP method " & name)
-
 proc processRequest(
   server: AsyncHttpServer,
   req: FutureVar[Request],
@@ -187,9 +173,17 @@ proc processRequest(
   for linePart in lineFut.mget.split(' '):
     case i
     of 0:
-      try:
-        request.reqMethod = parseUppercaseMethod(linePart)
-      except ValueError:
+      case linePart
+      of "GET": request.reqMethod = HttpGet
+      of "POST": request.reqMethod = HttpPost
+      of "HEAD": request.reqMethod = HttpHead
+      of "PUT": request.reqMethod = HttpPut
+      of "DELETE": request.reqMethod = HttpDelete
+      of "PATCH": request.reqMethod = HttpPatch
+      of "OPTIONS": request.reqMethod = HttpOptions
+      of "CONNECT": request.reqMethod = HttpConnect
+      of "TRACE": request.reqMethod = HttpTrace
+      else:
         asyncCheck request.respondError(Http400)
         return true # Retry processing of request
     of 1:
@@ -242,8 +236,7 @@ proc processRequest(
   # - Check for Content-length header
   if request.headers.hasKey("Content-Length"):
     var contentLength = 0
-    if parseSaturatedNatural(request.headers["Content-Length"],
-        contentLength) == 0:
+    if parseSaturatedNatural(request.headers["Content-Length"], contentLength) == 0:
       await request.respond(Http400, "Bad Request. Invalid Content-Length.")
       return true
     else: