I have written some code in Kotlin that should retrieve some data for a dictionary app using the JSON Request Object. I can see that the call is made successfully. The website receiving the call shows the data being sent back but I'm not getting anything back in the results object. Logcat is showing this error (E/JSON ERROR: No value for results). I'm not sure where I'm going wrong in extracting the results. Can someone point me in the right direction?
val jsonObjectRequest = JsonObjectRequest(Request.Method.GET, url, null,
{ response ->
try {
val resultsObj = response.getJSONObject("results")
val result: JSONObject = response.getJSONObject("result")
val term = result.getString("term")
val definition = result.getString("definition")
val partOfSpeech = result.getString("partOfSpeech")
val example = result.getString("example")
} catch (ex: JSONException) {
Log.e("JSON ERROR", ex.message!!)
}
},
{ error: VolleyError? -> error?.printStackTrace() })
The JSON
{
"results": {
"result": {
"term": "consistent, uniform",
"definition": "the same throughout in structure or composition",
"partofspeech": "adj",
"example": "bituminous coal is often treated as a
consistent and homogeneous product"
}
}
}
Have you checked the json format? Json Formatter
Here with this code it is valid. You had his character end line in the wrong place.
{
"results":{
"result":{
"term":"consistent, uniform",
"definition":"the same throughout in structure or composition",
"partofspeech":"adj",
"example":"bituminous coal is often treated as a consistent and homogeneous product"
}
}
}
Related
I have a server set up to send messages over a local host port. I am trying to decode the serialized json messages sent by the server and get this error.
Error decoding message: kotlinx.serialization.json.internal.JsonDecodingException: Unexpected JSON token at offset 55: Expected EOF after parsing, but had instead at path: $
JSON input: .....mber":13,"Timestamp":5769784} .....
The Racer State messages are formatted in JSON as follows: { “SensorId”: “value”, “RacerBibNumber” : “value”, “Timestamp” : “value” }, where the value’s are character string representations of the field values. I have also tried changing my RacerStatus Class to take String instead of Int but to a similar error. Am I missing something here? The symbol that is missing in the error was not able to be copied over so I know it's not UTF-8.
I have also added
val inputString = bytes.toString(Charsets.UTF_8)
println("Received input: $inputString")
This gets
Received input: {"SensorId":0,"RacerBibNumber":5254,"Timestamp":3000203}
with a bunch of extraneous symbols at the end.
data class RacerStatus(
var SensorId: Int,
var RacerBibNumber: Int,
var Timestamp: Int
) {
fun encode(): ByteArray {
return Json.encodeToString(serializer(), this).toByteArray()
}
companion object {
fun decode(bytes: ByteArray): RacerStatus {
print(bytes[0])
try {
val mstream = ByteArrayInputStream(bytes)
return Json.decodeFromStream<RacerStatus>(mstream)
} catch (e: SerializationException) {
println("Error decoding message: $e")
return RacerStatus(0, 0, 0)
}
// return Json.decodeFromString(serializer(), mstream.readBytes().toString())
}
}
}
So I found an answer to my question. I added a regex to include just the json components I know my json contains.
val str = bytes.toString(Charsets.UTF_8)
val re = Regex("[^A-Za-z0-9{}:,\"\"]")
return Json.decodeFromString<RacerStatus>(re.replace(str,""))
I thought that Charsets.UTF_8 would remove the misc characters but it did not. Is there a more intiuative solution? Also is there a regex that would cover all possible values in json?
I am storing the response of a REST Get request and trying to access as below,
final JSONObject receivedItem = new JSONObject(response.readEntity(String.class));
This is the sample response,
[
{
"timeStamp": 1511136000000,
"contextKeys": [
{
"tKey": "Test1",
"contextKey": "Location",
"contextValue": "San Jose",
"eCount": 3
},
{
"tKey": "Test1",
"contextKey": "Name",
"contextValue": "User1",
"eCount": 3
}
}
]
And i am getting the below error,
org.json.JSONException: A JSONObject text must begin with '{' at character 1
at org.json.JSONTokener.syntaxError(JSONTokener.java:496)
at org.json.JSONObject.<init>(JSONObject.java:180)
at org.json.JSONObject.<init>(JSONObject.java:403)
Any clues ?
Thanks
As Rajkumar pointed out, in your example there is a missing close bracket - but this may just be a simple typing error.
The actual error message is saying A JSONObject text must begin with '{' which is because JSON objects are exactly that, objects. You need to use a JSONArray to parse your example JSON as follows:
final JSONArray receivedItem = new JSONArray(response.readEntity(String.class));
This may change some of your other code to handle this as an array vs an object.
If your problem is with storing and accessing json response try this response instead;
I am presuming that you are using javascript; Anyways, core idea is the same;
var jsonStorage;
$.getJSON('your url',(json) => {
jsonStorage = json;
});
console.log(jsonStorage) //your jsonresponse is now available here;
I am working on windows phone 8 app. In which I need to call an api to get some response, that I am serializing and saving into local settings
While saving these data I am getting an exception of type 'System.Runtime.Serialization.SerializationException'.
My Code is,
string someData = responseDataDict["SomeData"].ToString();
if someData != null)
{
Dictionary<string, Object> someDict = JsonConvert.DeserializeObject<Dictionary<string, object>>(someData);
Datastore.SaveData = stringDict;
}
public static Datastore
{
get
{
if (localSettings.Contains("SaveData"))
{
return (Dictionary<string, Object>)localSettings["SaveData];
else
return null;
}
}
set
{
localSettings["SaveData"] = value;
localSettings.Save();
}
}
}
The response from api is,
"MESSAGE": "Some Message",
"UI_MESSAGE": {
"LEFT": "OK",
"RIGHT": "CANCEL",
}
I think the problem is in "UI_MESSAGE",
The Exception is,
System.Runtime.Serialization.SerializationException: Type 'Newtonsoft.Json.Linq.JObject' with data contract name 'ArrayOfKeyValueOfstringJTokeneJCYCtcq:http://schemas.microsoft.com/2003/10/Serialization/Arrays' is not expected. Add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to DataContractSerializer.
Please help me to resolve this issue, Thanks in advance
You can't (easily) serialize the data because the serializer doesn't know how to serialize Newtonsoft.Json.Linq.JObject types.
We could try to figure out how to get the serializer working with this type, which may or may not take lots of time, or we could stop and think for a bit...
You grab the response data in the line
string someData = responseDataDict["SomeData"].ToString();
What is someData? It's
{
"MESSAGE": "Some Message",
"UI_MESSAGE": {
"LEFT": "OK",
"RIGHT": "CANCEL",
}
That's a json string. A serialized javascript object. It's already bloody serialized.
Save that in localSettings.
I have a JSON response to validate. I am writing a test secario where I want to assert if the response contains the number of objects or not. JSON response:
{
"Result": {
"resultCode": "1000",
},
"ResultClient": {
"responseCode": null,
"statusCode": null
},
"creditCard": {
"number": null
}
}
I want to assert that the response has 3 objects. How to do that? The response obj dosn't have size() or count() so I am unable to understand the path to the solution.I am writting my tests in rest-assured .
TestResponse testResponse = given()
.contentType("application/json; charset=UTF-8")
.body(cTestRequest)
.when()
.post(uri)
.as(TestResponse.class);
now how to assert the json contains the 3 obj and the parameters inside the objs?
You can do something like this:
when().
get("/x").
then().
body("keySet().size()", is(3));
The reason is that the JSON object is treated as Groovy Map so you can invoke functions on it. keySet() returns all keys as a Set and size() returns the size of this Set.
I have the below JSON string coming in as a request parameter into my grails controller.
{
"loginName":"user1",
"timesheetList":
[
{
"periodBegin":"2014/10/12",
"periodEnd":"2014/10/18",
"timesheetRows":[
{
"task":"Cleaning",
"description":"cleaning description",
"paycode":"payCode1"
},
{
"task":"painting",
"activityDescription":"painting description",
"paycode":"payCode2"
}
]
}
],
"overallStatus":"SUCCESS"
}
As you can see, the timesheetList might have multiple elements in it. In this ( above ) case, we have only one. So, I expect it to behave like an Array/List.
Then I had the below code to parse through it:
String saveJSON // This holds the above JSON string.
def jsonObject = grails.converters.JSON.parse(saveJSON) // No problem here. Returns a JSONObject. I checked the class type.
def jsonArray = jsonArray.timesheetList // No problem here. Returns a JSONArray. I checked the class type.
println "*** Size of jsonArray1: " + jsonArray1.size() // Returns size 1. It seemed fine as the above JSON string had only one timesheet in timesheetList
def timesheet1 = jsonArray[1] // This throws the JSONException, JSONArray[1] not found. I tried jsonArray.getJSONObject(1) and that throws the same exception.
Basically, I am looking to seamlessly iterate through the JSON string now. Any help?
1st off to simplify your code, use request.JSON. Then request.JSON.list[ 0 ] should be working