public void ParametersAreAppendedCorrectly(string initial, string expected)
{
var actual = UrlHelper.AppendParameter(initial, "q", "42");
Assert.Equal(expected, actual);
}
public async Task <HealthCheckResult> CheckNow(CancellationToken cancel)
{
string outcome;
Exception exception = null;
int? statusCode = null;
string contentType = null;
long? contentLength = null;
string initialContent = null;
JToken data = null;
var probeId = Nonce.Generate(12);
var probedUrl = _bypassHttpCaching ?
UrlHelper.AppendParameter(_targetUrl, ProbeIdParameterName, probeId) :
_targetUrl;
var utcTimestamp = DateTime.UtcNow;
var sw = Stopwatch.StartNew();
try
{
var request = new HttpRequestMessage(HttpMethod.Get, probedUrl);
request.Headers.Add("X-Correlation-ID", probeId);
if (_bypassHttpCaching)
{
request.Headers.CacheControl = new CacheControlHeaderValue {
NoStore = true
}
}
;
var response = await _httpClient.SendAsync(request, cancel);
statusCode = (int)response.StatusCode;
contentType = response.Content.Headers.ContentType?.ToString();
contentLength = response.Content.Headers.ContentLength;
var content = await response.Content.ReadAsStreamAsync();
(initialContent, data) = await DownloadContent(content, contentType, contentLength);
outcome = response.IsSuccessStatusCode ? OutcomeSucceeded : OutcomeFailed;
}
catch (Exception ex)
{
outcome = OutcomeFailed;
exception = ex;
}
sw.Stop();
var level = outcome == OutcomeFailed ? "Error" :
data == null && _extractor != null ? "Warning" :
null;
return(new HealthCheckResult(
utcTimestamp,
_title,
"GET",
_targetUrl,
outcome,
probeId,
level,
sw.Elapsed.TotalMilliseconds,
statusCode,
contentType,
contentLength,
initialContent,
exception,
data,
_targetUrl == probedUrl ? null : probedUrl));
}