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606 lines
23 KiB
606 lines
23 KiB
using Apewer.Network;
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using Apewer.Source;
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using System;
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using System.Net;
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using static Apewer.Web.ApiUtility;
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namespace Apewer.Web
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{
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internal class ApiProcessor
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{
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internal ApiInvoker Invoker = null;
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internal ApiEntries Entries = null;
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internal ApiProvider Provider = null;
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internal Action<ApiCatch> Catcher = null;
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ApiOptions Options = null;
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DateTime Begin = DateTime.UtcNow;
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Uri Url = null;
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HttpMethod Method = HttpMethod.NULL;
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ApiRequest ApiRequest = null;
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ApiResponse ApiResponse = null;
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internal ApiProcessor()
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{
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}
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/// <summary>执行处理程序,返回错误信息。</summary>
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public string Run()
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{
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if (Options == null) Options = new ApiOptions();
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var error = Flow();
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return error;
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}
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string Flow()
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{
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// 传入字段。
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if (Provider == null) return "服务程序无效。";
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if (Invoker == null) return "调用器无效。";
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if (Entries == null) return "入口无效。";
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Options = Invoker.Options ?? new ApiOptions();
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Provider.Options = Options;
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try
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{
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// 检查执行的前提条件,获取 Method 和 URL。
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var check = Check();
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if (!string.IsNullOrEmpty(check)) return check;
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// 准备请求和响应模型。
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ApiRequest = GetRequest(Provider, Options, Method, Url);
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ApiResponse = new ApiResponse();
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ApiResponse.Random = ApiRequest.Random;
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ApiResponse.Application = ApiRequest.Application;
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ApiResponse.Function = ApiRequest.Function;
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// 调用 API。
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var invoke = Invoke();
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if (!string.IsNullOrEmpty(invoke)) return invoke;
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// 输出。
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ApiResponse.Duration = Duration();
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Output(Provider, Options, ApiResponse, ApiRequest, Method);
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return null;
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}
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catch (Exception ex)
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{
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var message = ex.Message();
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Logger.Internals.Error(typeof(ApiInvoker), message);
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return message;
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}
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}
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string Duration()
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{
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var span = DateTime.UtcNow - Begin;
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var ms = span.TotalMilliseconds;
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if (ms > 0D)
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{
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var s = span.TotalMilliseconds / 1000D;
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if (s > 10D) return Math.Round(s, 1).ToString() + "s";
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if (s > 1D) return Math.Round(s, 2).ToString() + "s";
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if (ms > 10D) return Math.Round(ms, 0).ToString() + "ms";
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return Math.Round(ms, 1).ToString() + "ms";
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}
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else
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{
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return null;
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}
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}
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string Check()
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{
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// 服务程序检查。
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var check = Provider.PreInvoke();
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if (!string.IsNullOrEmpty(check)) return check;
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// URL
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Url = Provider.GetUrl();
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if (Url == null) return "URL 无效。";
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Method = Provider.GetMethod();
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if (Method == HttpMethod.NULL) return "HTTP 方法无效。";
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if (Method == HttpMethod.OPTIONS) return null;
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// favicon.ico
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var lowerPath = TextUtility.AssureStarts(TextUtility.Lower(Url.AbsolutePath), "/");
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if (!Options.AllowFavIcon)
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{
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if (lowerPath.StartsWith("/favicon.ico"))
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{
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Output(Provider, Options, null, null, null);
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return "已取消对 favicon.ico 的请求。";
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}
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}
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// robots.txt
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if (!Options.AllowRobots)
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{
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if (lowerPath.StartsWith("/robots.txt"))
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{
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const string text = "User-agent: *\nDisallow: / \n";
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Output(Provider, Options, null, "text/plain", TextUtility.Bytes(text));
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return "已取消对 robots.txt 的请求。";
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}
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}
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return null;
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}
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// 寻找入口。
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string Invoke()
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{
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var appName = ApiRequest.Application;
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var funcName = ApiRequest.Function;
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var random = ApiRequest.Random;
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Invoke(Entries.Get(appName));
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ApiResponse.Duration = Duration();
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ApiResponse.Application = appName;
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ApiResponse.Function = funcName;
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ApiResponse.Random = random;
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return null;
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}
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// 创建控制器。
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void Invoke(ApiApplication application)
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{
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var request = ApiRequest;
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var response = ApiResponse;
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var function = null as ApiFunction;
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var controller = null as ApiController;
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// Application 无效,尝试默认控制器和枚举。
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if (application == null)
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{
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var @default = Options.Default;
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if (@default == null)
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{
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// 没有指定默认控制器,尝试枚举。
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response.Error("Invalid Application");
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if (Options.AllowEnumerate) response.Data = Enumerate(Entries.Enumerate(), Options);
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return;
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}
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else
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{
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// 创建默认控制器。
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try { controller = CreateController(@default, request, response, Options); }
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catch (Exception ex) { ApiUtility.Exception(response, ex.InnerException); }
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}
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}
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else
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{
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// 创建控制器时候会填充 Controller.Request 属性,可能导致 Request.Function 被篡改,所以在创建之前获取 Function。
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function = application.Get(request.Function);
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try { controller = CreateController(application.Type, request, response, Options); }
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catch (Exception ex) { ApiUtility.Exception(response, ex.InnerException); }
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}
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if (controller == null) response.Error("创建控制器实例失败。");
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else Invoke(controller, application, function, Options, request, response);
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RuntimeUtility.Dispose(controller);
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}
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// 调用 Function。
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void Invoke(ApiController controller, ApiApplication application, ApiFunction function, ApiOptions options, ApiRequest request, ApiResponse response)
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{
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// 没有 ApiApplication,使用了 Options 中指定的默认控制器。
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if (application == null)
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{
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application = new ApiApplication();
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application.Independent = true;
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application.Hidden = true;
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}
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try
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{
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// 控制器初始化。
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var initializer = ApiUtility.GetInitialier(controller);
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var match = initializer == null ? true : initializer.Invoke(controller);
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if (!match) return;
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if (application.Independent) return;
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if (function != null)
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{
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// 调用 API,获取返回值。
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var result = function.Method.Invoke(controller, ReadParameters(request, function));
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if (response.StopReturn) return;
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// 检查返回值。
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if (result == null || function.Returnable == null) return;
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var returnable = function.Returnable;
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// 已明确字符串类型,视为提示错误。
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if (returnable.Equals(typeof(string)))
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{
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var error = result as string;
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if (!string.IsNullOrEmpty(error)) response.Error(error);
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return;
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}
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// 已明确 Exception 类型,视为提示错误。
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if (result is Exception)
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{
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ApiUtility.Exception(response, result as Exception);
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return;
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}
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// 已明确 Json 类型。
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if (result is Json)
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{
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response.Data = result as Json;
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return;
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}
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// 已明确 Model 类型。
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if (result is ApiModel)
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{
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response.Model = result as ApiModel;
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return;
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}
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// 类型未知,尝试 ToJson 方法。
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var tojson = result as IToJson;
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if (tojson != null)
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{
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response.Data = tojson.ToJson();
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return;
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}
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// 类型未知,尝试 Record 模型。
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var record = result as IRecord;
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if (record != null)
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{
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response.Data = Json.From(record);
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return;
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}
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// 未知类型,尝试 Json 类型。
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var json = result as Json;
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if (json != null)
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{
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response.Data = json;
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return;
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}
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// 未知返回类型,无法明确输出格式,忽略。
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}
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else
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{
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// 未匹配到 Function,尝试 Default。
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var @default = ApiUtility.GetDefault(controller);
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if (@default != null)
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{
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@default.Invoke(controller);
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return;
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}
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// 没有执行任何 Function,尝试枚举。
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if (application.Hidden)
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{
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response.Error("Invalid Application");
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}
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else
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{
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response.Error("Invalid Function");
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if (options.AllowEnumerate) response.Data = Enumerate(application.Items, options);
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}
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}
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}
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catch (Exception exception)
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{
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var ex = exception.InnerException;
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if (Catcher != null)
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{
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ApiUtility.Exception(response, ex, false);
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try
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{
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var apiCatch = new ApiCatch(controller, options, ex);
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Catcher.Invoke(apiCatch);
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}
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catch { }
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return;
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}
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ApiUtility.Exception(response, ex);
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}
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}
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static ApiController CreateController(Type type, ApiRequest request, ApiResponse response, ApiOptions options)
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{
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var controller = (ApiController)Activator.CreateInstance(type);
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ApiUtility.SetProperties(controller, request, response, options);
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return controller;
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}
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#region static
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internal static ApiRequest GetRequest(ApiProvider provider, ApiOptions options, HttpMethod method, Uri url)
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{
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// 创建数据对象。
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var request = new ApiRequest();
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// Http Method。
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request.Method = method;
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// 基本信息。
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var ip = provider.GetClientIP();
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var headers = provider.GetHeaders() ?? new StringPairs();
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request.Headers = headers;
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request.IP = ip;
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request.Url = url;
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request.Referrer = provider.GetReferrer();
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request.Parameters = ApiUtility.Parameters(url.Query);
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// Headers。
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request.UserAgent = ApiUtility.UserAgent(headers);
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request.Cookies = ParseCookies(headers) ?? new CookieCollection();
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// 匹配 API。
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var application = null as string;
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var function = null as string;
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var random = null as string;
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var ticket = null as string;
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var session = null as string;
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var page = null as string;
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// 解析 POST 请求。
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if (request.Method == HttpMethod.POST)
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{
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var preRead = provider.PreRead();
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if (string.IsNullOrEmpty(preRead))
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{
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var post = null as byte[];
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var length = 0L;
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var max = options.MaxRequestBody;
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if (max == 0) post = new byte[0];
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else if (max < 0) post = provider.RequestBody().Read();
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else
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{
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length = provider.GetContentLength();
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if (length <= max) post = provider.RequestBody().Read();
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}
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length = post == null ? 0 : post.Length;
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if (length > 1)
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{
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request.PostData = post;
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if (length < 104857600)
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{
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var text = TextUtility.FromBytes(post);
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request.PostText = text;
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// 尝试解析 Json,首尾必须是“{}”或“[]”。
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var first = post[0];
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var last = post[length - 1];
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if ((first == 123 && last == 125) || (first == 91 && last == 93))
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{
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var json = Json.From(text);
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if (json != null && json.IsObject)
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{
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application = json["application"];
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function = json["function"];
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random = json["random"];
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ticket = json["ticket"];
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session = json["session"];
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page = json["page"];
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var data = json.GetProperty("data");
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request.PostJson = json;
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request.Data = data ?? Json.NewObject();
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}
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}
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// 尝试解析 Form,需要 application/x-www-form-urlencoded
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var contentType = headers.GetValue("content-type", true) ?? "";
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if (contentType.Contains("urlencoded")) request.Form = ApiUtility.Parameters(text);
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}
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}
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}
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}
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// 解析 URL 参数。
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// URL 参数的优先级应高于 URL 路径,以避免反向代理产生的路径问题。
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var urlParameters = ApiUtility.Parameters(request.Url.Query);
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if (string.IsNullOrEmpty(application)) application = urlParameters.GetValue("application");
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if (string.IsNullOrEmpty(function)) function = urlParameters.GetValue("function");
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if (string.IsNullOrEmpty(random)) random = urlParameters.GetValue("random");
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if (string.IsNullOrEmpty(ticket)) ticket = urlParameters.GetValue("ticket");
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if (string.IsNullOrEmpty(session)) session = urlParameters.GetValue("session");
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if (string.IsNullOrEmpty(page)) page = urlParameters.GetValue("page");
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// 从 Cookie 中获取 Ticket。
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var cookies = request.Cookies;
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if (string.IsNullOrEmpty(ticket)) ticket = cookies.GetValue("ticket");
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// 最后检查 URL 路径。
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var paths = (request.Url.AbsolutePath ?? "").Split('/');
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if (string.IsNullOrEmpty(application) && paths.Length >= 2) application = TextUtility.DecodeUrl(paths[1]);
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if (string.IsNullOrEmpty(function) && paths.Length >= 3) function = TextUtility.DecodeUrl(paths[2]);
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// 修正内容。
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application = TextUtility.Trim(application);
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function = TextUtility.Trim(function);
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random = TextUtility.Trim(random);
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ticket = TextUtility.Trim(ticket);
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session = TextUtility.Trim(session);
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page = TextUtility.Trim(page);
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// 设置请求:回传。
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request.Application = application;
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request.Function = function;
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request.Random = random;
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// 设置请求:不回传。
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request.Ticket = ticket;
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request.Session = session;
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request.Page = page;
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return request;
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}
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static StringPairs PrepareHeaders(ApiOptions options, ApiResponse response, ApiRequest request = null)
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{
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var merged = new StringPairs();
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if (options != null)
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{
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// 跨域访问。
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if (options.WithAccessControl)
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{
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merged.Add("Access-Control-Allow-Headers", "Content-Type");
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merged.Add("Access-Control-Allow-Methods", "GET, POST, OPTIONS");
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merged.Add("Access-Control-Allow-Origin", "*");
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var maxage = options.AccessControlMaxAge;
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if (maxage > 0) merged.Add("Access-Control-Max-Age", maxage.ToString());
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if (request != null && request.Headers != null)
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{
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var @private = request.Headers.GetValue("Access-Control-Request-Private-Network");
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if (NumberUtility.Boolean(@private)) merged.Add("Access-Control-Allow-Private-Network", "true");
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}
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}
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// Content-Type 检查。
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if (options.WithContentTypeOptions || options.Default != null)
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{
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merged.Add("X-Content-Type-Options", "nosniff");
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}
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// 用于客户端,当前页面使用 HTTPS 时,将资源升级为 HTTPS。
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if (options.UpgradeHttps)
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{
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merged.Add("Content-Security-Policy", "upgrade-insecure-requests");
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}
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// 包含 API 的处理时间。
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if (options.WithDuration && response != null)
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{
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if (response.Duration.NotEmpty()) merged.Add("Duration", response.Duration);
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}
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}
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if (response != null)
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{
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// Cookies。
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var setCookies = SetCookie(response.Cookies);
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if (setCookies != null)
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{
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foreach (var value in setCookies) merged.Add("Set-Cookie", value);
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}
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// 自定义头。
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var headers = response.Headers;
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if (headers != null)
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{
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foreach (var header in headers)
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{
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var key = TextUtility.Trim(header.Key);
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if (string.IsNullOrEmpty(key)) continue;
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var value = header.Value;
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if (string.IsNullOrEmpty(value)) continue;
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merged.Add(key, value);
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}
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}
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}
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return merged;
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}
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internal static string ExportJson(ApiResponse response, ApiOptions options)
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{
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if (response == null) return "{}";
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if (string.IsNullOrEmpty(response.Status)) response.Status = "ok";
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var json = Json.NewObject();
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// 执行时间。
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if (options.WithClock)
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{
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json.SetProperty("clock", ClockUtility.Lucid(DateTime.Now));
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}
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// 持续时间。
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if (options.WithDuration)
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{
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if (response.Duration.NotEmpty()) json.SetProperty("duration", response.Duration);
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}
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// 随机值。
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var random = response.Random;
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if (!string.IsNullOrEmpty(random)) json.SetProperty("random", random);
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// 调用。
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if (options.WithTarget)
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{
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json.SetProperty("application", response.Application);
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json.SetProperty("function", response.Function);
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}
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// 状态。
|
|
json.SetProperty("status", (TextUtility.IsBlank(response.Status) ? TextUtility.Empty : response.Status.ToLower()));
|
|
if (!string.IsNullOrEmpty(response.Message)) json.SetProperty("message", response.Message);
|
|
|
|
// 用户数据。
|
|
if (response.Message == "exception" && !options.WithException) json.SetProperty("data");
|
|
else json.SetProperty("data", response.Data);
|
|
|
|
var indented = response.Indented || options.JsonIndent;
|
|
var text = json.ToString(indented);
|
|
return text;
|
|
}
|
|
|
|
internal static void Output(ApiProvider provider, ApiOptions options, ApiResponse response, string type, byte[] bytes)
|
|
{
|
|
var preWrite = provider.PreWrite();
|
|
if (!string.IsNullOrEmpty(preWrite)) return;
|
|
|
|
var headers = PrepareHeaders(options, response);
|
|
foreach (var header in headers) provider.SetHeader(header.Key, header.Value);
|
|
|
|
provider.SetCache(0);
|
|
provider.SetContentType(string.IsNullOrEmpty(type) ? "application/octet-stream" : type);
|
|
|
|
var length = bytes == null ? 0 : bytes.Length;
|
|
provider.SetContentLength(length);
|
|
if (length > 0) provider.ResponseBody().Write(bytes, 0, bytes.Length);
|
|
provider.Sent();
|
|
}
|
|
|
|
internal static void Output(ApiProvider provider, ApiOptions options, ApiResponse response, ApiRequest request, HttpMethod method)
|
|
{
|
|
var preWrite = provider.PreWrite();
|
|
if (!string.IsNullOrEmpty(preWrite)) return;
|
|
|
|
// 设置头。
|
|
var headers = PrepareHeaders(options, response, request);
|
|
foreach (var header in headers) provider.SetHeader(header.Key, header.Value);
|
|
var model = response.Model;
|
|
if (model != null)
|
|
{
|
|
ApiUtility.Initialize(model, request, response, options, provider);
|
|
try { model.Output(); }
|
|
catch (Exception ex) { Logger.Internals.Exception(model, ex); }
|
|
RuntimeUtility.Dispose(model);
|
|
return;
|
|
}
|
|
|
|
var text = ExportJson(response, options);
|
|
var bytes = TextUtility.Bytes(text);
|
|
provider.SetCache(0);
|
|
provider.SetContentType("text/json; charset=utf-8");
|
|
provider.SetContentLength(bytes.Length);
|
|
var stream = provider.ResponseBody();
|
|
if (stream != null && stream.CanWrite) stream.Write(bytes, 0, bytes.Length);
|
|
provider.Sent();
|
|
}
|
|
|
|
#endregion
|
|
|
|
}
|
|
|
|
}
|
|
|