I have made a REST call to a url and need to pass the jsonresponse obtained from the synchronous method to the below asynchronous method.I have used a static variable - strresponse to do the same.But i am getting a null value when i call this value in the asynchronous method.Could this be because asynchronous methods do not remember the value given by a synchronous method? is there any alternate way this could be done?
code below:
public with sharing class myController {
public Static String strResponse ;
#AuraEnabled
public static Map<String, Object> retriveNews(){
HttpRequest httpRequest = new HttpRequest();
httpRequest.setEndpoint('endpoint URL');
httpRequest.setMethod('GET');
try{
Http http = new Http();
HttpResponse httpResponse = http.send(httpRequest);
if(httpResponse.getStatusCode() == 200){
newsController.strResponse = httpResponse.getBody();
} else {
throw new CalloutException(httpResponse.getBody());
}
} catch(Exception ex){
throw ex;
}
Map<String, Object> newsJsonData = new Map<String, Object>();
if(!String.isBlank(newsController.strResponse)){
System.debug('jsonstring:'+newsController.strResponse);
newsJsonData = (Map<String, Object>)JSON.deserializeUntyped(newsController.strResponse);
}
System.debug('jsonstring in retrivenews:'+newsController.strResponse);
if(!newsJsonData.isEmpty()){
return newsJsonData;
} else {
return null;
}
}
#future(callout=true)
public static void insertnews()
{
List<Newsroom__c> nrmlist = new List<Newsroom__c>();
System.debug('jsonstring in insertnews:'+newsController.strResponse);
JSONParser parser = JSON.createParser(newsController.strResponse);
while (parser.nextToken() != null) {
// Start at the array of invoices.
if (parser.getCurrentToken() == JSONToken.START_ARRAY) {
while (parser.nextToken() != null) {
// Advance to the start object marker to
// find next invoice statement object.
if (parser.getCurrentToken() == JSONToken.START_OBJECT) {
objectne nrm = (objectne)parser.readValueAs(objectne.class);
objectne__c nroom = new objectne__c(Author__c = nrm.Author,Description__c = nrm.Description);
String s = JSON.serialize(nrm);
system.debug('Serialized object: ' + s);
nrmlist.add(nroom);
system.debug('list of nrooms:'+ nrmlist);
}
}
}
}
Database.SaveResult[] lsr = Database.insert(nrmlist, false) ;
System.debug(lsr);
}
Error - when newscontroller.insertnews() is called - null string to parser
I am trying to send a stream (containing an image file) from a WASM client to a backend .NET Core 5 server. In the WASM app, I start with a MemoryStream that contains the file data. In order to send the data contained in this MemoryStream using HttpClient.PostAsync, I seem to have to convert it to a StreamContent object:
StreamContent streamContent = new StreamContent(imageMemoryStream);
I use the debugger to verify that the length of the content of streamContent is not zero at this point. So far so good.
I then use HttpClient.PostAsync to send this stream to the server:
var response = await Http.PostAsync("api/HttpStreamReceiver", streamContent);
On the server side, I have a controller that receives HTTP messages:
[Route("api/[controller]")]
[ApiController]
public class HttpStreamReceiverController : ControllerBase
{
[HttpPost]
public async Task<ActionResult> Get()
{
Stream imageStream;
try
{
imageStream = Request.Body;
}
catch (Exception)
{
return new BadRequestObjectResult("Error saving file");
}
}
}
Here, it seems that Request.Body is empty. Trying to evaluate the length of either Request.Body or of imageStream on the server side results in a System.NotSupportedException, and
await imageStream.ReadAsync(buffer);
leaves buffer blank. What am I doing wrong here?
The image file cannot be transmitted through the body unless it is serialized. I suggest you use MultipartFormDataContent to pass the file.
This is an example.
class Program
{
static async Task Main(string[] args)
{
string filePath = #"D:\upload\images\1.png";
HttpClient _httpClient = new HttpClient();
string _url = "https://localhost:44324/api/HttpStreamReceiver/";
if (string.IsNullOrWhiteSpace(filePath))
{
throw new ArgumentNullException(nameof(filePath));
}
if (!File.Exists(filePath))
{
throw new FileNotFoundException($"File [{filePath}] not found.");
}
//Create form
using var form = new MultipartFormDataContent();
FileStream fs = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.ReadWrite);
byte[] buffur = new byte[fs.Length];
BinaryWriter bw = new BinaryWriter(fs);
bw.Write(buffur);
//var bytefile = AuthGetFileData(filePath);
var fileContent = new ByteArrayContent(buffur);
fileContent.Headers.ContentType = MediaTypeHeaderValue.Parse("multipart/form-data");
form.Add(fileContent, "image", Path.GetFileName(filePath));
//the other data in form
var response = await _httpClient.PostAsync($"{_url}", form);
response.EnsureSuccessStatusCode();
var responseContent = await response.Content.ReadAsStringAsync();
bw.Close();
}
}
Web api.
[Route("api/[controller]")]
[ApiController]
public class HttpStreamReceiverController: ControllerBase
{
[HttpPost]
public async Task<ActionResult> Get(IFormFile image)
{
//...
return Ok("get");
}
}
Result:
I am using Apache HttpClient to put/get customized object using REST APIs. Below is the sample code. My putObject() method works fine and I could serialize Person object and put properly. However, while getting the object, I got below error:
Exception in thread "main" java.lang.ClassCastException: [B cannot be cast to Person at MyTest.demoGetRESTAPI(MyTest.java:88) at MyTest.main(MyTest.java:21)
Seems the code to build Person object out of response entity is not correct
HttpEntity httpEntity = response.getEntity();
byte[] resultByteArray = EntityUtils.toByteArray(httpEntity);
Person person = (Person)SerializationUtils.deserialize(resultByteArray);
Am I doing somthing wrong while getting byte[] array and converting to Person object. Please help me out to solve this issue.
Complete Example Program:
import java.io.Serializable;
import org.apache.commons.lang.SerializationUtils;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.entity.SerializableEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
public class MyTest {
public static void main(String[] args) throws Exception {
putObject();
getObject();
}
public static void putObject() throws Exception
{
HttpClient httpClient = new DefaultHttpClient();
Person person = new Person();
person.setName("Narendra");
person.setId("1");
try
{
//Define a postRequest request
HttpPut putRequest = new HttpPut("http://localhost:9084/ehcache-server/rest/screeningInstance/2221");
//Set the API media type in http content-type header
putRequest.addHeader("content-type", "application/x-java-serialized-object");
//Set the request put body
SerializableEntity personSEntity = new SerializableEntity(SerializationUtils.serialize(person));
putRequest.setEntity(personSEntity);
//Send the request; It will immediately return the response in HttpResponse object if any
HttpResponse response = httpClient.execute(putRequest);
//verify the valid error code first
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode != 201)
{
throw new RuntimeException("Failed with HTTP error code : " + statusCode);
}
}
finally
{
//Important: Close the connect
httpClient.getConnectionManager().shutdown();
}
}
public static void getObject() throws Exception
{
DefaultHttpClient httpClient = new DefaultHttpClient();
try
{
//Define a HttpGet request; You can choose between HttpPost, HttpDelete or HttpPut also.
//Choice depends on type of method you will be invoking.
HttpGet getRequest = new HttpGet("http://localhost:9084/ehcache-server/rest/screeningInstance/2221");
//Set the API media type in http accept header
getRequest.addHeader("accept", "application/x-java-serialized-object");
//Send the request; It will immediately return the response in HttpResponse object
HttpResponse response = httpClient.execute(getRequest);
//verify the valid error code first
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode != 200)
{
throw new RuntimeException("Failed with HTTP error code : " + statusCode);
}
//Now pull back the response object
HttpEntity httpEntity = response.getEntity();
byte[] resultByteArray = EntityUtils.toByteArray(httpEntity);
Person person = (Person)SerializationUtils.deserialize(resultByteArray);
}
finally
{
//Important: Close the connect
httpClient.getConnectionManager().shutdown();
}
}
}
class Person implements Serializable{
String name;
String id;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
#Override
public String toString() {
return "Person [name=" + name + ", id=" + id + "]";
}
}
I got the solution. It was mistake in my code:
While putting object, I have written below code. That was doing two time serialization. First from Person object to byte[] and second from byte[] to byte[].
SerializableEntity personSEntity = new SerializableEntity(SerializationUtils.serialize(person));
putRequest.setEntity(personSEntity);
This is the right approach:
SerializableEntity personSEntity = new SerializableEntity(person);
putRequest.setEntity(personSEntity);
After getting binary from REST, code should be like below to get Object:
HttpEntity httpEntity = response.getEntity();
InputStream inputStream = null;
try {
inputStream = httpEntity.getContent();
Person p = (Person) SerializationUtils.deserialize(inputStream);
System.out.println("Person:" + p.getName());
}
finally {
inputStream.close();
}
This worked like CHARM !!
I am porting a game from Java Native to Unity. While the game is working correctly, I am having trouble posting the score using the same web services.
Java Code:
public static String gameConfigURL = "http://192.168.0.140/services/scoreupload.svc/json/GetGameConfigurationLite";
public static String scoreUploadURL = "http://192.168.0.140/services/scoreupload.svc/json/Upload";
public static final String MagicKey = "0GmWDa6j";
private static int timeoutConnection = 60000;
public static enum RequestSource
{
Unknown,
System,
Person;
}
public static Response sendRequestForResult(Request request, String Url,
Activity activity, Response response) throws JSONException,
ClientProtocolException, IOException,ConnectTimeoutException {
/** Code to create a JSON request from requestObject **/
JSONObject object = request.getJSON();
JSONObject requestObject = new JSONObject();
requestObject.put("request", object);
Log.v("","REQUEST:"+requestObject.toString());
/** Add code to create a HttpPostRequest **/
DefaultHttpClient client = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(Url);
HttpParams httpParameters = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
HttpResponse httpResponse = null;
String jsonValueString = null;
StringEntity se = null;
try {
se = new StringEntity(requestObject.toString());
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
httpPost.setEntity(se);
httpPost.setHeader("Accept", "application/json");
httpPost.setHeader("Content-Type", "text/json");
/**
* add code to attach the JSON object received from request to the
* HttpPostRequest Add Code to execute HttpRequest
**/
httpResponse = client.execute(httpPost);
/** Get string from the HttpRespnse **/
jsonValueString = EntityUtils.toString(httpResponse.getEntity());
Log.v("","RESPONSE:"+jsonValueString);
/** Create JSON object from incoming String **/
JSONObject repliedObject = new JSONObject(jsonValueString);
response.fromJSON(repliedObject);
return response;
How Do I convert this to unity C#.
So far I have this:
JSONObject j = new JSONObject ();
j.AddField ("Id", "1234567890");
j.AddField ("MagicKey", ApplicationServices.magicKey);
j.AddField ("RequestedBy", "09996f84-1a06-e211-a518-001aa020d699");
j.AddField ("Timestamp", "/Date(1547535370953)/");
j.AddField ("RequestSource", "Person");
j.AddField ("RequestedGameId", "375b43c0-91be-e011-a505-001aa020d699");
j.AddField ("RequestedPersonId", "09996f84-1a06-e211-a518-001aa020d699");
string json = j.ToString ();
Dictionary<string, string> header = new Dictionary<string, string>();
header.Add ("Accept", "application/json");
header.Add ("Content-Type", "text/json");
byte[] encode = Encoding.ASCII.GetBytes (json.ToCharArray ());
WWW getConfig = new WWW (ApplicationServices.gameConfigURL, encode, header);
yield return getConfig;
if (getConfig.error != null) {
Debug.Log (getConfig.error);
} else {
Debug.Log (getConfig.text);
}
This does not seem to work.
For "POST" you should use WWWForm instead of WWW.
Take a look here
I have written one simple web service which get product list in JSONText which is string object
Web Service code is below
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.Services;
using System.Web.Script.Services;
using System.Runtime.Serialization.Json;
using System.IO;
using System.Text;
/// <summary>
/// Summary description for JsonWebService
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.Web.Script.Services.ScriptService]
public class JsonWebService : System.Web.Services.WebService
{
public JsonWebService () {
//Uncomment the following line if using designed components
//InitializeComponent();
}
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public string GetProductsJson(string prefix)
{
List<Product> products = new List<Product>();
if (prefix.Trim().Equals(string.Empty, StringComparison.OrdinalIgnoreCase))
{
products = ProductFacade.GetAllProducts();
}
else
{
products = ProductFacade.GetProducts(prefix);
}
//yourobject is your actula object (may be collection) you want to serialize to json
DataContractJsonSerializer serializer = new DataContractJsonSerializer(products.GetType());
//create a memory stream
MemoryStream ms = new MemoryStream();
//serialize the object to memory stream
serializer.WriteObject(ms, products);
//convert the serizlized object to string
string jsonString = Encoding.Default.GetString(ms.ToArray());
//close the memory stream
ms.Close();
return jsonString;
}
}
now it give me resoponse like below :
{"d":"[{\"ProductID\":1,\"ProductName\":\"Product 1\"},{\"ProductID\":2,\"ProductName\":\"Product 2\"},{\"ProductID\":3,\"ProductName\":\"Product 3\"},{\"ProductID\":4,\"ProductName\":\"Product 4\"},{\"ProductID\":5,\"ProductName\":\"Product 5\"},{\"ProductID\":6,\"ProductName\":\"Product 6\"},{\"ProductID\":7,\"ProductName\":\"Product 7\"},{\"ProductID\":8,\"ProductName\":\"Product 8\"},{\"ProductID\":9,\"ProductName\":\"Product 9\"},{\"ProductID\":10,\"ProductName\":\"Product 10\"}]"}
But i am looking for below out put
[{"ProductID":1,"ProductName":"Product 1"},{"ProductID":2,"ProductName":"Product 2"},{"ProductID":3,"ProductName":"Product 3"},{"ProductID":4,"ProductName":"Product 4"},{"ProductID":5,"ProductName":"Product 5"},{"ProductID":6,"ProductName":"Product 6"},{"ProductID":7,"ProductName":"Product 7"},{"ProductID":8,"ProductName":"Product 8"},{"ProductID":9,"ProductName":"Product 9"},{"ProductID":10,"ProductName":"Product 10"}]
can any one tell me what is actual problem
Thanks
First there was a change with ASP.NET 3.5 for security reasons Microsoft added the "d" to the response. Below is a link from Dave Ward at the Encosia that talks about what your seeing:
A breaking change between versions of ASP.NET AJAX. He has several posts that talks about this that can help you further with processing JSON and ASP.NET
Actually, if you just remove the
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
from the method, and you return the jsonString that you serialized using the JavaScriptSerializer you will get exactelly the output that you were looking for.
Notice that u have double quotes beside ur array in your response.In this way u return json format not json object from ur web method.Json format is a string.Therefore u have to use json.parse() function in order to parse json string to json object.If u dont want to use parse fuction,u have to remove serialize in ur web method.Thus u get a json object.
in .net web service
[WebMethod]
public string Android_DDD(string KullaniciKey, string Durum, string PersonelKey)
{
return EU.EncodeToBase64("{\"Status\":\"OK\",\"R\":[{\"ImzaTipi\":\"Paraf\", \"Personel\":\"Ali Veli üğişçöıÜĞİŞÇÖI\", \"ImzaDurumTipi\":\"Tamam\", \"TamamTar\":\"1.1.2003 11:21\"},{\"ImzaTipi\":\"İmza\", \"Personel\":\"Ali Ak\", \"ImzaDurumTipi\":\"Tamam\", \"TamamTar\":\"2.2.2003 11:21\"}]}");
}
static public string EncodeToBase64(string toEncode)
{
UTF8Encoding encoding = new UTF8Encoding();
byte[] bytes = encoding.GetBytes(toEncode);
string returnValue = System.Convert.ToBase64String(bytes);
return returnValue;
}
in android
private static String convertStreamToString(InputStream is)
{
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try
{
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
}
catch (IOException e)
{
e.printStackTrace();
}
finally
{
try
{
is.close();
}
catch (IOException e)
{
e.printStackTrace();
}
}
return sb.toString();
}
private void LoadJsonDataFromASPNET()
{
try
{
DefaultHttpClient httpclient = new DefaultHttpClient();
HttpPost httpPostRequest = new HttpPost(this.WSURL + "/WS.asmx/Android_DDD");
JSONObject jsonObjSend = new JSONObject();
jsonObjSend.put("KullaniciKey", "value_1");
jsonObjSend.put("Durum", "value_2");
jsonObjSend.put("PersonelKey", "value_3");
StringEntity se = new StringEntity(jsonObjSend.toString());
httpPostRequest.setEntity(se);
httpPostRequest.setHeader("Accept", "application/json");
httpPostRequest.setHeader("Content-type", "application/json");
// httpPostRequest.setHeader("Accept-Encoding", "gzip"); // only set this parameter if you would like to use gzip compression
HttpResponse response = (HttpResponse) httpclient.execute(httpPostRequest);
HttpEntity entity = response.getEntity();
if (entity != null)
{
InputStream instream = entity.getContent();
String resultString = convertStreamToString(instream);
instream.close();
resultString = resultString.substring(6, resultString.length()-3);
resultString = new String(android.util.Base64.decode(resultString, 0), "UTF-8");
JSONObject object = new JSONObject(resultString);
String oDurum = object.getString("Status");
if (oDurum.equals("OK"))
{
JSONArray jsonArray = new JSONArray(object.getString("R"));
if (jsonArray.length() > 0)
{
for (int i = 0; i < jsonArray.length(); i++)
{
JSONObject jsonObject = jsonArray.getJSONObject(i);
String ImzaTipi = jsonObject.getString("ImzaTipi");
String Personel = jsonObject.getString("Personel");
String ImzaDurumTipi = jsonObject.getString("ImzaDurumTipi");
String TamamTar = jsonObject.getString("TamamTar");
Toast.makeText(getApplicationContext(), "ImzaTipi:" + ImzaTipi + " Personel:" + Personel + " ImzaDurumTipi:" + ImzaDurumTipi + " TamamTar:" + TamamTar, Toast.LENGTH_LONG).show();
}
}
}
}
}
catch (Exception e)
{
e.printStackTrace();
}
}