async void StartHttp()
{
// NOTE: For an `async void` function, we have to wrap all its code
// inside try-catch-block, so that exception does NOT leak into unknown world.
try
{
string url = edtURL.Text;
int timeout_millisec = int.Parse(edtTimeoutMs.Text);
AsyncHttp.HeaderDict headers = new AsyncHttp.HeaderDict()
{
{
HttpRequestHeader.UserAgent,
"Mozilla/5.0 (Windows NT 10.0; Win64; x64; Trident/7.0; rv:11.0) like Gecko"
},
};
string postbody = "MyPostText";
postbody = null;
AsyncHttp ahttp = new AsyncHttp(url, headers, postbody);
_cts = new CancellationTokenSource();
logtid($"HTTP starts. \r\n" +
$" URL: {url}\r\n" +
$" Timeout: {timeout_millisec} millisec"
); // note: "\n" only does not cause line break
_tskHttp = ahttp.StartAsText(_cts.Token, timeout_millisec);
string body = await _tskHttp;
logtid(
$"HTTP success. Body bytes: {ahttp._respbody_bytes.Length}, body chars: {ahttp._respbody_text.Length}");
}
catch (Exception e)
{
UIPromptException(e);
}
finally
{
if (_tskHttp != null)
{
_tskHttp.Dispose();
}
_tskHttp = null;
} // try-block end
} // async function end
} // async function end
async Task StartStress()
{
try
{
string url = edtURL.Text;
int cycles = int.Parse(edtStressCycles.Text);
int timeout_millisec = int.Parse(edtTimeoutMs.Text);
bool is_eager_report = ckbEagerReport.Checked;
Stopwatch sw = new Stopwatch();
sw.Restart();
long msec_prev = 0;
long msec_now = 0;
var dict_bytes2count = new Dictionary <int, int>(); // map http response-body bytes to count
AsyncHttp.HeaderDict headers = new AsyncHttp.HeaderDict()
{
{
HttpRequestHeader.UserAgent,
"Mozilla/5.0 (Windows NT 10.0; Win64; x64; Trident/7.0; rv:11.0) like Gecko"
},
};
string postbody = "MyPostText";
postbody = null;
for (int i = 0; i < cycles; i++)
{
AsyncHttp ahttp = new AsyncHttp(url, headers, postbody);
_cts = new CancellationTokenSource();
if (is_eager_report)
{
logtid($"HTTP starts. {url}");
}
_tskHttp = ahttp.StartAsText(_cts.Token, timeout_millisec);
string body = await _tskHttp;
int nrbyte = ahttp._respbody_bytes.Length;
int nrchar = ahttp._respbody_text.Length;
if (dict_bytes2count.ContainsKey(nrbyte))
{
dict_bytes2count[nrbyte]++;
}
else
{
dict_bytes2count[nrbyte] = 1;
}
if (is_eager_report)
{
logtid(
$"[{i}]HTTP success. Body bytes: {nrbyte}, body chars: {nrchar}");
}
else // not eager report, report every 1 second
{
msec_now = sw.ElapsedMilliseconds;
if (msec_now - msec_prev >= 1000)
{
logtid($"{i+1} success");
msec_prev = msec_now;
}
}
}
// print summary
string info = "HTTP response summary:\r\n";
foreach (int nrbyte in dict_bytes2count.Keys.OrderBy(key => key))
{
string oneline = $" [{nrbyte} bytes] {dict_bytes2count[nrbyte]} occurrence.";
info += oneline + "\r\n";
}
logtid(info);
logtid($"Total milliseconds cost: {sw.ElapsedMilliseconds}");
}
catch (Exception e)
{
UIPromptException(e);
}
finally
{
// _tskHttp.Dispose();
_tskHttp = null;
} // try-block end
}