public static async Task <DigitalPlatform.HTTP.HttpResponse> WebCall(DigitalPlatform.HTTP.HttpRequest request,
string transferEncoding,
TimeSpan timeout)
{
// 从 request.Url 中解析出 remoteUserName
string remoteUserName = request.Url;
if (string.IsNullOrEmpty(remoteUserName) == false &&
remoteUserName[0] == '/')
{
remoteUserName = remoteUserName.Substring(1);
}
{
// 只取第一级作为对方用户名
List <string> parts = StringUtil.ParseTwoPart(remoteUserName, "/");
remoteUserName = parts[0];
}
WebData data = MessageUtility.BuildWebData(request, transferEncoding);
string id = Guid.NewGuid().ToString();
WebCallRequest param = new WebCallRequest(id,
transferEncoding,
data,
true,
true);
// CancellationToken cancel_token = new CancellationToken();
try
{
// Console.WriteLine("Begin WebCall");
#if NO
MessageConnection connection = _channels.GetConnectionTaskAsync(
Url,
remoteUserName).Result;
WebCallResult result = connection.WebCallTaskAsync(
remoteUserName,
param,
new TimeSpan(0, 1, 10), // 10 秒
_cancel.Token).Result;
#endif
MessageConnection connection = await _messageChannels.GetConnectionTaskAsync(
Url,
remoteUserName, // 每个图书馆一根独立通道
true,
true); // 采用 incUseCount。使用后要归还
WebCallResult result = null;
try
{
result = await connection.WebCallTaskAsync(
remoteUserName,
param,
timeout == TimeSpan.MinValue?new TimeSpan(0, 1, 10) : timeout, // 1分10 秒
_cancel.Token);
}
finally
{
_messageChannels.ReturnConnection(connection);
}
// Console.WriteLine("End WebCall result=" + result.Dump());
if (result.Value == -1)
{
// 构造一个 500 错误响应包
return(new DigitalPlatform.HTTP.HttpResponse("500",
"Router Error: " + WebUtility.UrlEncode(result.ErrorInfo),
result.ErrorInfo));
}
return(MessageUtility.BuildHttpResponse(result.WebData, transferEncoding));
}
catch (AggregateException ex)
{
string code = "500";
WriteErrorLog("1(测试): " + ex.ToString()); // 2016/10/29
string error = ExceptionUtil.GetExceptionText(ex);
Console.WriteLine("Exception: " + error);
MessageException ex1 = ExceptionUtil.FindInnerException(ex, typeof(MessageException)) as MessageException;
if (ex1 != null && ex1.ErrorCode.ToLower() == "unauthorized")
{
error = "dp2Router 针对 dp2MServer 的账户 '" + ex1.UserName + "' 登录失败";
code = "401";
}
WriteErrorLog("1: " + error);
// 构造一个错误代码响应包
return(new DigitalPlatform.HTTP.HttpResponse(
code,
"Router Error: " + WebUtility.UrlEncode(error),
error));
}
catch (Exception ex)
{
WriteErrorLog("2: " + ExceptionUtil.GetExceptionText(ex));
// 构造一个 500 错误响应包
return(new DigitalPlatform.HTTP.HttpResponse(
"500",
"Router Error: " + WebUtility.UrlEncode(ex.Message),
ExceptionUtil.GetExceptionText(ex)));
}
}