✔ JSON mittels eval()

[Kiloui]

Hi,
ich lese mittels einer JSP Daten aus einer Oracle Datenbank und gebe diese dann in JSON Syntax zurück. Anschließend hole ich mir diese Daten per Ajax Request in meine Index.html.

Die Daten sehen wie folgt aus:

{"CALLSIGN_OTHER_AIRPLANE":["CAJUN02","CAJUN01","JEUS1","JEUS1"],"ALTITUDE_MSL":["14774.7","13837.2","27366","28088.2"],"CALLSIGN":["CAJUN01","CAJUN02","JEUS1","JEUS1"],"H_DIST_IN_METER":["177.91832","177.91832","783.002","783.002"],"V_DIST_IN_FEET":["937.5","937.5","722.2","722.2"],"TIME_OF_DAY_UTC_MS":[null,null,null,null],"TTL":["5","5","5","5"],"MANEUVER":["0","0","0","0"],"LATITUDE":["49.414925","49.416325","48.11217","48.116978"],"SPEED_VERTI_FTMIN":["-8438.63","-8749.04","-498.134","1150.69"],"TIME_STAMP":["1970-01-01 18:49:39.847","1970-01-01 18:49:39.847","1970-01-01 18:49:39.847","1970-01-01 18:49:39.847"],"TIME_LAST_UPDATE_MS":["67777250","67776508","67775813","67775820"],"TIME_TAG_MS":["67779847","67779847","67779847","67779847"],"HEADING_DEG":["193.224","250.908","10.732","9.26098"],"I48_230":[null,null,null,null],"TRACK_ID_OTHER_AIRPLANE":["131","132","565","564"],"LONGITUDE":["7.10975","7.108565","7.22684","7.219151"],"ALTITUDE_AGL":[null,null,null,null],"SPEED_HORI_KT":["176.233","127.898","396.112","415.594"],"TRACK_ID":["132","131","564","565"],"STREAM_ID":["34ed2fe","34ed2fe","34ed2fe","34ed2fe"]}

Nun möchte ich mittels eval() ein JSON Objekt daraus erzeugen...jedoch klappt das ganze nicht.

Wenn ich

var response = http.responseText;
var responseAsJson = eval(response);
document.getElementById("Ausgabe").innerHTML = response;

schreibe dann erhalte ich eine leere Seite und die Fehlermeldung:

syntax error
[Bei diesem Fehler anhalten] var responseAsJson = eval(response);

Das komische ist wenn ich die Daten die ich durch den Ajax Request erhalte einfach kopiere und als String in eine Variable lege dann funktioniert folgendes:

var json_objekt = '{"CALLSIGN_OTHER_AIRPLANE":["CAJUN02","CAJUN01","JEUS1","JEUS1"],"ALTITUDE_MSL":["14774.7","13837.2","27366","28088.2"],"CALLSIGN":["CAJUN01","CAJUN02","JEUS1","JEUS1"],"H_DIST_IN_METER":["177.91832","177.91832","783.002","783.002"],"V_DIST_IN_FEET":["937.5","937.5","722.2","722.2"],"TIME_OF_DAY_UTC_MS":[null,null,null,null],"TTL":["5","5","5","5"],"MANEUVER":["0","0","0","0"],"LATITUDE":["49.414925","49.416325","48.11217","48.116978"],"SPEED_VERTI_FTMIN":["-8438.63","-8749.04","-498.134","1150.69"],"TIME_STAMP":["1970-01-01 18:49:39.847","1970-01-01 18:49:39.847","1970-01-01 18:49:39.847","1970-01-01 18:49:39.847"],"TIME_LAST_UPDATE_MS":["67777250","67776508","67775813","67775820"],"TIME_TAG_MS":["67779847","67779847","67779847","67779847"],"HEADING_DEG":["193.224","250.908","10.732","9.26098"],"I48_230":[null,null,null,null],"TRACK_ID_OTHER_AIRPLANE":["131","132","565","564"],"LONGITUDE":["7.10975","7.108565","7.22684","7.219151"],"ALTITUDE_AGL":[null,null,null,null],"SPEED_HORI_KT":["176.233","127.898","396.112","415.594"],"TRACK_ID":["132","131","564","565"],"STREAM_ID":["34ed2fe","34ed2fe","34ed2fe","34ed2fe"]} ';

var o = eval("(" + json_objekt + ")");
document.getElementById("Ausgabe2").innerHTML = o.CALLSIGN_OTHER_AIRPLANE;

 

[CPoly]

Versuch es so:

//Vorher
var responseAsJson = eval(response);

//Nachher
eval('var responseAsJson = ' + response);

//Oder besser
var responseAsJson = (new Function('return ' + response))();

//Oder noch besser für moderne Browser
var responseAsJson = JSON.parse(response);

 

[Kiloui]

Hi,
danke für deine Mühe.

Aber leider klappt das auch nicht
Bei den ersten beiden Versionen von dir bekomme ich ein "Syntax Error".

Und bei der dritten bekomme ich "JSON.parse: unexpected character"

 

[CPoly]

Dann liefert dein "http.responseText" nicht exakt das, was du hier gepostet hast.

 

[Kiloui]

Nochmal danke Habe gerade genau das feststellen müssen was du jetzt auch meintest
Meine JSP hat nicht nur den JSON String geliefert sondern es waren noch die ganzen html Tags um den JSON String drum Jetzt läuft es...

 

[sheel]

@Kiloui:
Man muss seine Frage nicht unkenntlich machen, die kann man ruhig stehen lassen...

Und auf "Erledigt" setzen kannst du das Thema selber (und außer Moderatoren nur du)
Blau-weißer Haken unten neben "Auf Thema antworten" oder das "Nein" bei "Erledigt" oben.

Habs diesmal schon gemacht.

Gruß