“头疼”
自己在用Angular做项目时,前端要请求后端数据时的代码如下
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this .http. get ( "url/xxx" ) |
这是请求一个URL地址数据最简单的代码,但是如此简单的代码还会遇到一些头疼的问题
- URL地址拼写错误,有可能折腾半天才发现
- 后端修改了地址没通知到前端,测试不到位就炸了,不是所有项目都有那么规范的接口变更流程
- 查看代码的时候,看着URL地址,这个地址用途是哈?还要翻接口文档
“吃药”
为了解决这个问题,我们需要一个包含所有接口的文件
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import { environment } from 'src/environments/environment' ; export const WebAPI = { /** 授权控制器 */ Auth: { /** */ Controller: `${environment.host}/api/Auth`, /** GET 获得用户 */ GetUser: `${environment.host}/api/Auth/GetUser`, /** POST 登陆 */ Login: `${environment.host}/api/Auth/Login`, }, } |
那么请求代码就可以改成
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this .http. get (WebAPI.Auth.GetUser) |
但是维护这个文件是件吃力的事情,作为一个时刻想着如何偷懒的程序员,吃力的事情就让计算机去干,所以写一个代码生成工具。
工具代码
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public static class BuildWebApiToTS { public static string Build(Assembly assembly, string prefix = "api/" ) { List<Controller> controllers = GetApis(assembly); string code = CreateCode(controllers); return code.ToString(); } public static void BuildToFile(Assembly assembly, string path, string prefix = "api/" ) { var code = Build(assembly, prefix); string existsCode = "" ; if (System.IO.File.Exists(path) == true ) existsCode = System.IO.File.ReadAllText(path); if (existsCode != code) System.IO.File.WriteAllText(path, code); } #region 构造代码 public static string CreateCode(List<Controller> controllers, string prefix = "api/" ) { StringBuilder code = new StringBuilder(); code.AppendLine( "import { environment } from 'src/environments/environment';" ); code.AppendLine( "export const WebAPI = {" ); foreach (var coll in controllers.OrderBy(x => x.Name)) { code.AppendLine($ " /** {coll.ApiComments?.Title} */" ); code.AppendLine($ " {coll.Name}: {{" ); code.AppendLine($ " Controller: `${{environment.host}}/{prefix}{coll.Name}`," ); foreach (var action in coll.Actions.OrderBy(x => x.Name)) { code.AppendLine($ " /** {action.Type} {action.ApiComments?.Title} */" ); code.AppendLine($ " {action.Name}: `${{environment.host}}/{prefix}{coll.Name}/{action.Name}`," ); } code.AppendLine($ " }}," ); } code.AppendLine($ "}};" ); return code.ToString(); } #endregion #region 获得接口清单 public static List<Controller> GetApis(Assembly assembly) { List<Controller> controllers = new List<Controller>(); var collTypes = assembly.GetTypes().Where(x => x.GetCustomAttributes( typeof (ApiControllerAttribute), false ).Count() > 0); foreach (var collType in collTypes) { var controller = new Controller(collType.Name.Replace( "Controller" , "" )); controller.ApiComments = collType.GetCustomAttribute<ApiCommentsAttribute>(); controllers.Add(controller); controller.Actions.AddRange(GetTypeMembers(collType, typeof (HttpGetAttribute), "GET" )); controller.Actions.AddRange(GetTypeMembers(collType, typeof (HttpPostAttribute), "POST" )); controller.Actions.AddRange(GetTypeMembers(collType, typeof (HttpPutAttribute), "PUT" )); controller.Actions.AddRange(GetTypeMembers(collType, typeof (HttpDeleteAttribute), "DELETE" )); } return controllers; } private static List<Action> GetTypeMembers(Type type, Type whereType, string saveType) { var actonTypes = type.GetMembers().Where(x => x.GetCustomAttributes(whereType, false ).Count() > 0); List<Action> actons = new List<Action>(); foreach (var actonType in actonTypes) { var action = new Action(saveType, actonType.Name); action.ApiComments = actonType.GetCustomAttribute<ApiCommentsAttribute>(); actons.Add(action); } return actons; } public record Controller( string Name) { public ApiCommentsAttribute ApiComments { get ; set ; } public List<Action> Actions { get ; set ; } = new List<Action>(); } public record Action( string Type, string Name) { public ApiCommentsAttribute ApiComments { get ; set ; } } #endregion } public class ApiCommentsAttribute : Attribute { public string Title { get ; set ; } public ApiCommentsAttribute( string title) { Title = title; } } |
使用代码
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#if DEBUG BuildWebApiToTS.BuildToFile( typeof (Program).Assembly, "ClientApp/src/app/web-api.ts" ); #endif |
上面代码大概的流程就是
-
利用反射读取程序集中包含
ApiControllerAttribute
特性的类 -
利用发射读取
HttpGetAttribute
、HttpPostAttribute
、HttpPutAttribute
、HttpDeleteAttribute
特性的方法 - 根据需要的格式生成代码
-
将代码文件写入
ClientApp/src/app/web-api.ts
有了这个东西带来以下好处
- URL地址拼写错误问题,不存在的
- 后端修改了接口,前端直接编译不过,立即发现问题
- 鼠标停留,接口注释就显示了
以上就是c#代码生成URL地址的方法的详细内容,更多关于c#代码生成URL地址的资料请关注服务器之家其它相关文章!
原文链接:https://www.cnblogs.com/TimChen44/archive/2021/04/10/14642328.html