private async Task HandleMessage(string message)
{
if (string.IsNullOrWhiteSpace(message))
{
_logger.LogWarning($"任务 {Id} 接收到空消息");
return;
}
_lastRequestedTime = DateTime.Now;
var responses = JsonConvert.DeserializeObject <List <Response> >(message);
if (responses.Count == 0)
{
_logger.LogWarning($"任务 {Id} 接收到空回复");
return;
}
var agentId = responses.First().AgentId;
var successResponses = responses.Where(x => x.Success).ToList();
// 统计下载成功
if (successResponses.Count > 0)
{
var elapsedMilliseconds = successResponses.Sum(x => x.ElapsedMilliseconds);
await _statisticsService.IncrementDownloadSuccessAsync(agentId, successResponses.Count,
elapsedMilliseconds);
}
// 处理下载成功的请求
Parallel.ForEach(successResponses, async response =>
{
_logger.LogInformation($"任务 {Id} 下载 {response.Request.Url} 成功");
var context = new DataFlowContext(_services.CreateScope().ServiceProvider);
context.AddResponse(response);
try
{
bool success = true;
foreach (var dataFlow in _dataFlows)
{
var dataFlowResult = await dataFlow.HandleAsync(context);
switch (dataFlowResult)
{
case DataFlowResult.Success:
{
continue;
}
case DataFlowResult.Failed:
{
_logger.LogError($"任务 {Id} 数据流处理器 {dataFlow.GetType().Name} 失败");
success = false;
break;
}
case DataFlowResult.Terminated:
{
break;
}
}
}
var resultItems = context.GetItems();
// 如果解析结果为空，重试
if ((resultItems == null || resultItems.Sum(x => x.Value == null ? 0 : x.Value.Count) == 0) &&
RetryWhenResultIsEmpty)
{
response.Request.RetriedTimes++;
response.Request.ComputeHash();
// 不需要添加总计
_scheduler.Enqueue(new[] { response.Request.Clone() });
}
// 解析的目标请求
var followRequests = context.GetTargetRequests();
if (followRequests != null && followRequests.Count > 0)
{
var requests = new List <Request>();
foreach (var followRequest in followRequests)
{
followRequest.Depth = response.Request.Depth + 1;
if (followRequest.Depth <= Depth)
{
requests.Add(followRequest);
}
}
var count = _scheduler.Enqueue(requests);
if (count > 0)
{
await _statisticsService.IncrementTotalAsync(Id, count);
}
}
if (success)
{
await _statisticsService.IncrementSuccessAsync(Id);
}
else
{
await _statisticsService.IncrementFailedAsync(Id);
}
var result = success ? "成功" : $"失败: {context.Result}";
_logger.LogInformation($"任务 {Id} 处理 {response.Request.Url} {result}");
}
catch (Exception e)
{
_logger.LogInformation($"任务 {Id} 处理 {response.Request.Url} 失败: {e}");
}
});
var retryResponses =
responses.Where(x => !x.Success && x.Request.RetriedTimes < RetryDownloadTimes)
.ToList();
retryResponses.ForEach(x =>
{
x.Request.RetriedTimes++;
_logger.LogInformation($"任务 {Id} 下载 {x.Request.Url} 失败: {x.Exception}");
});
var failedRequests =
responses.Where(x => !x.Success)
.ToList();
// 统计下载失败
if (failedRequests.Count > 0)
{
await _statisticsService.IncrementFailedAsync(Id);
await _statisticsService.IncrementDownloadFailedAsync(agentId, failedRequests.Count);
}
var retryCount = _scheduler.Enqueue(retryResponses.Select(x => x.Request.Clone()));
if (retryCount > 0)
{
await _statisticsService.IncrementTotalAsync(Id, retryCount);
}
}