PostAsync

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static readonly HttpClient Client = new HttpClient();
public async Task<T> PostAsync<T>(string url, object data) where T : class, new()
{
try
{
string content = JsonConvert.SerializeObject(data);
var buffer = Encoding.UTF8.GetBytes(content);
var byteContent = new ByteArrayContent(buffer);
byteContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
var response = await Client.PostAsync(url, byteContent).ConfigureAwait(false);
string result = await response.Content.ReadAsStringAsync();
if (response.StatusCode != HttpStatusCode.OK)
{
logger.Error($"GetAsync End, url:{url}, HttpStatusCode:{response.StatusCode}, result:{result}");
return new T();
}
logger.Info($"GetAsync End, url:{url}, result:{result}");
return JsonConvert.DeserializeObject<T>(result);
}
catch (WebException ex)
{
if (ex.Response != null)
{
string responseContent = new StreamReader(ex.Response.GetResponseStream()).ReadToEnd();
throw new System.Exception($"response :{responseContent}", ex);
}
throw;
}
}

GetAsync

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static readonly HttpClient Client = new HttpClient();
public async Task<string> GetAsync(string url, object data)
{
try
{
string requestUrl = $"{url}?{GetQueryString(data)}";
logger.Info($"GetAsync Start, requestUrl:{requestUrl}");
var response = await Client.GetAsync(requestUrl).ConfigureAwait(false);
string result = await response.Content.ReadAsStringAsync();
logger.Info($"GetAsync End, requestUrl:{requestUrl}, HttpStatusCode:{response.StatusCode}, result:{result}");
return result;
}
catch (WebException ex)
{
if (ex.Response != null)
{
string responseContent = new StreamReader(ex.Response.GetResponseStream()).ReadToEnd();
throw new Exception($"Response :{responseContent}", ex);
}
throw;
}
}

private static string GetQueryString(object obj)
{
var properties = from p in obj.GetType().GetProperties()
where p.GetValue(obj, null) != null
select p.Name + "=" + HttpUtility.UrlEncode(p.GetValue(obj, null).ToString());

return String.Join("&", properties.ToArray());
}