/// <summary>异步调用，等待返回结果</summary>
/// <typeparam name="TResult">响应类型，优先原始字节数据，字典返回整体，Object返回data，没找到data时返回整体字典，其它对data反序列化</typeparam>
/// <param name="client">Http客户端</param>
/// <param name="method">请求方法</param>
/// <param name="action">服务操作</param>
/// <param name="args">参数</param>
/// <param name="onRequest">请求头回调</param>
/// <param name="dataName">数据字段名称，默认data。同一套rpc体系不同接口的code/message一致，但data可能不同</param>
/// <returns></returns>
public static async Task <TResult> InvokeAsync <TResult>(this HttpClient client, HttpMethod method, String action, Object args = null, Action <HttpRequestMessage> onRequest = null, String dataName = "data")
{
//if (client?.BaseAddress == null) throw new ArgumentNullException(nameof(client.BaseAddress));
var returnType = typeof(TResult);
// 构建请求
var request = BuildRequest(method, action, args);
// 指定返回类型
if (returnType == typeof(Byte[]) || returnType == typeof(Packet))
{
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/octet-stream"));
}
else
{
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
}
// 可能附加头部
onRequest?.Invoke(request);
// 开始跟踪，注入TraceId
using var span = Tracer?.NewSpan(request);
try
{
// 发起请求
Filter?.OnRequest(client, request, null);
var response = await client.SendAsync(request);
Filter?.OnResponse(client, response, null);
return(await ProcessResponse <TResult>(response, dataName));
}
catch (Exception ex)
{
// 跟踪异常
span?.SetError(ex, args);
Filter?.OnError(client, ex, null);
throw;
}
}
