Delpin Susai Raj

Delpin Susai Raj

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Memory increase gradually after every HTTPClient Call in Xam

Dec 2 2017 5:10 AM
Memory increase gradually after every HTTPClient Call in Xamarin iOS. GC collection is not effective
I have monitor the Application Activity using **Instrument**. I have noticed that **Real mem** is gradually increase. I just need release the memory which is used by HTTPClient.
I have tried using Dispose(),used using statement,used GC.collect; but those are not reducing the memory. It looks like not effective.
Below is code used in the program.
namespace MemoryManagementStudy
{
public partial class ViewController : UIViewController
{
protected ViewController(IntPtr handle) : base(handle)
{
}
NetworkStaticCall networkStaticCall;
public override void ViewDidLoad()
{
//lblStatusUpdate.Text = "Success Count: 0, Fail Count: 0 -- Last Update: " + DateTime.Now;
base.ViewDidLoad();
//string status = "";
networkStaticCall = new NetworkStaticCall();
networkStaticCall.init();
Timer timer = new Timer(1000 * 30);
timer.AutoReset = true;
timer.Elapsed += async (sender, e) => {
Console.WriteLine("Memory " + GC.GetTotalMemory(true));
await networkStaticCall.MakeSMWebService();
Console.WriteLine("Memory " + GC.GetTotalMemory(true));
};
timer.Start();
}
public override void DidReceiveMemoryWarning()
{
base.DidReceiveMemoryWarning();
}
}
class NetworkStaticCall
{
//int successCount = 0;
//int failCount = 0;
private static HttpClient httpClient;
private static HttpResponseMessage httpResponseMessage;
private StringContent dataContent;
private string xmlString;
private static HttpClientHandler httpClientHandler;
private NSUrlSessionHandler nsUrlSessionHandler;
public void init()
{
httpClientHandler = new HttpClientHandler();
httpClientHandler.Credentials = new NetworkCredential("userName", "Password"); ;
httpClient = new HttpClient(httpClientHandler);
httpClient.DefaultRequestHeaders.Accept.Clear();
dataContent = new StringContent("Xml String Content",
Encoding.UTF8, "text/xml");
}
public async Task MakeSMWebService()
{
Console.WriteLine("Call Processing");
try
{
httpClient.DefaultRequestHeaders.Accept.Clear();
httpResponseMessage = await httpClient.PostAsync("url", dataContent);
Console.WriteLine("Call success");
xmlString = await httpResponseMessage.Content.ReadAsStringAsync();
//successCount++;
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return "";
}
}
}
We have tried https://stackoverflow.com/a/27830926 but it is not working.
I have tried WebRequest but it still increasing
class CustomWebRequest{
string finalUrl = "URL";
WebRequest request;
WebResponse response;
StreamReader reader;
int successCount = 0;
int failCount = 0;
public void init(){
}
async public Task Post()
{
request = WebRequest.Create(finalUrl);
request.Method = "GET";
request.Timeout = 10000;
try
{
using (await request.GetResponseAsync())
{
using (reader = new StreamReader(response.GetResponseStream()))
{
Console.WriteLine(reader.ReadToEnd());
}
}
successCount++;
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
failCount++;
}
finally
{
if (response != null)
{
response.Close();
response.Dispose();
response = null;
}
if (reader != null)
{
reader.Close();
reader.Dispose();
reader = null;
}
if(request != null){
request.Abort();
request = null;
}
}
return string.Format("Success Count: {0}, Fail Count: {1}", successCount, failCount);
}
}

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Answers (2)