“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
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
import { environment } from 'src/environments/environment';
export const WebAPI = {
Auth: {
Controller: `${environment.host}/api/Auth`,
GetUser: `${environment.host}/api/Auth/GetUser`,
Login: `${environment.host}/api/Auth/Login`,
},
}那么请求代码就可以改成
this.http.get(WebAPI.Auth.GetUser)但是维护这个文件是件吃力的事情，作为一个时刻想着如何偷懒的程序员，吃力的事情就让计算机去干，所以写一个代码生成工具。
工具代码
public static class BuildWebApiToTS
{
public static string Build(Assembly assembly, string prefix = "api/")
{
List<Controller> controllers = GetApis(assembly);
string code = CreateCode(controllers);
return code.ToString();
}
public static void BuildToFile(Assembly assembly, string path, string prefix = "api/")
{
var code = Build(assembly, prefix);
string existsCode = "";
if (System.IO.File.Exists(path) == true)
existsCode = System.IO.File.ReadAllText(path);
if (existsCode != code)
System.IO.File.WriteAllText(path, code);
}
#region 构造代码
public static string CreateCode(List<Controller> controllers, string prefix = "api/")
{
StringBuilder code = new StringBuilder();
code.AppendLine("import { environment } from 'src/environments/environment';");
code.AppendLine("export const WebAPI = {");
foreach (var coll in controllers.OrderBy(x => x.Name))
{
code.AppendLine($" ");
code.AppendLine($" {coll.Name}: {{");
code.AppendLine($" Controller: `${{environment.host}}/{prefix}{coll.Name}`,");
foreach (var action in coll.Actions.OrderBy(x => x.Name))
{
code.AppendLine($" ");
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
#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地址的资料请关注编程网其它相关文章！
