/// <summary>
/// 从配置文件中读取信息，并转换为路由上下文
/// </summary>
/// <param name="routeContext"></param>
/// <returns></returns>
public static RouteContext Convert(DownstreamContext routeContext)
{
FileConfiguration fileConfiguration = InternalConfigurationHelper.Instance().GetConfiguration();
string upstreamUri = routeContext.UpstreamUri;
var configRoutes = fileConfiguration.Routes;
if (configRoutes == null || configRoutes.Count == 0)
{
routeContext = null;
return(routeContext);
}
//从配置文件里面查找进行
var configRoute = configRoutes.FirstOrDefault(x => x.UpstreamHost + x.UpstreamPathTemplate == upstreamUri);
if (configRoute == null)
{
routeContext = null;
return(routeContext);
}
Copy(routeContext, configRoute);
return(routeContext);
}
/// <summary>
/// 初始化路由信息
/// </summary>
/// <param name="context"></param>
private void MapDownstreamContextAsync(DownstreamContext context)
{
//1初始化配置文件
context.Configuration = InternalConfigurationHelper.Instance().GetConfiguration();
//2初始化下游请求对象
DownstreamRequestMapper requestMapper = new DownstreamRequestMapper(context.HttpContext.Request);
var downstreamRequest = requestMapper.Create();
//如果有错误，把错误信息加载到context
if (requestMapper.IsError)
{
SetPipelineError(context, requestMapper.GetError());
return;
}
context.DownstreamRequest = downstreamRequest;
//3查找下游请求路由
DownstreamRouteFinder downstreamRouteFinder = new DownstreamRouteFinder();
var downstreamRoute = downstreamRouteFinder.Get(context);
if (downstreamRouteFinder.IsError)
{
SetPipelineError(context, downstreamRouteFinder.GetError());
return;
}
context.DownstreamRoute = downstreamRoute;
//4下游请求改写
ResetDownsteamRequest(context);
}
/// <summary>
/// 配置文件的初始化话
/// </summary>
/// <param name="builder"></param>
private static void InitConfiguration(IApplicationBuilder builder)
{
var routeConfig = builder.ApplicationServices.GetService <IOptions <FileConfiguration> >();
if (routeConfig.Value == null)
{
throw new Exception("无法读取配置文件");
}
InternalConfigurationHelper.Instance(routeConfig.Value);
}
