api try catch/ add header to api request

@@ -37,13 +37,22 @@ apiRequest.ETRI = async ( query, argument ) => {
     return new Promise( ( resolve, reject ) => { 
         let apiReqJson = apiRequestJsonFrame;
         apiReqJson.argument = argument;
-        let apiReqOption = { uri : URL.ETRI + query, body : JSON.stringify( apiReqJson ) };
+        let apiReqOption = {             headers: {
+            "Accept": "application/json",
+            "Content-Type": "application/json",
+          },uri : URL.ETRI + query, body : JSON.stringify( apiReqJson ) };
           
           rp.post( apiReqOption )
           .then( ( body ) => {
               body = JSON.parse( body );
+              if( body.result == "-1" ) {
+                  throw new Error( body.reason );
+              }
               resolve( body );
           })
+          .catch( ( err ) => {
+              throw new Error( err );
+          });      
     })  
 }