使用.Net Core编写命令行工具(CLI)的方法_实用技巧_

 [Route("api/items")] [ApiController] public class ItemsController : ControllerBase { private readonly IMemoryCache _cache; private readonly string _key = "items"; public ItemsController(IMemoryCache memoryCache) { _cache = memoryCache; } [HttpGet] public IActionResult List() { var items = _cache.Get>(_key); return Ok(items); } [HttpGet("{id}")] public IActionResult Get(string id) { var item = _cache.Get>(_key).FirstOrDefault(n => n.Id == id); return Ok(item); } [HttpPost] public IActionResult Create(ItemForm form) { var items = _cache.Get>(_key) ?? new List(); var item = new Item { Id = Guid.NewGuid().ToString("N"), Name = form.Name, Age = form.Age }; items.Add(item); _cache.Set(_key, items); return Ok(item); } [HttpDelete("{id}")] public IActionResult Delete(string id) { var items = _cache.Get>(_key); var item = items?.SingleOrDefault(n => n.Id == id); if (item == null) { return NotFound(); } items.Remove(item); _cache.Set(_key, items); return Ok(); } }

 [HelpOption(Inherited = true)] //显示指令帮助，并且让子指令也继承此设置 [Command(Description = "A tool to communicate with web api"), //指令描述 Subcommand(typeof(ConfigCommand), typeof(ItemCommand))] //子指令 class Program { public static int Main(string[] args) { //配置依赖注入 var serviceCollection = new ServiceCollection(); serviceCollection.AddSingleton(PhysicalConsole.Singleton); serviceCollection.AddSingleton(); serviceCollection.AddHttpClient(); var services = serviceCollection.BuildServiceProvider(); var app = new CommandLineApplication(); app.Conventions .UseDefaultConventions() .UseConstructorInjection(services); var console = (IConsole)services.GetService(typeof(IConsole)); try { return app.Execute(args); } catch (UnrecognizedCommandParsingException ex) //处理未定义指令 { console.WriteLine(ex.Message); return -1; } } //指令逻辑 private int OnExecute(CommandLineApplication app, IConsole console) { console.WriteLine("Please specify a command."); app.ShowHelp(); return 1; } }

 [Command("config", Description = "Manage config"), Subcommand(typeof(GetCommand), typeof(SetCommand))] public class ConfigCommand { private int OnExecute(CommandLineApplication app, IConsole console) { console.Error.WriteLine("Please submit a sub command."); app.ShowHelp(); return 1; } } [Command("item", Description = "Manage item"), Subcommand(typeof(CreateCommand), typeof(GetCommand), typeof(ListCommand), typeof(DeleteCommand))] public class ItemCommand { private int OnExecute(CommandLineApplication app, IConsole console) { console.Error.WriteLine("Please submit a sub command."); app.ShowHelp(); return 1; } }

 public interface IConfigService { void Set(); Config Get(); } public class ConfigService: IConfigService { private readonly IConsole _console; private readonly string _directoryName; private readonly string _fileName; public ConfigService(IConsole console) { _console = console; _directoryName = ".api-cli"; _fileName = "config.json"; } public void Set() { var directory = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), _directoryName); if (!Directory.Exists(directory)) { Directory.CreateDirectory(directory); } var config = new Config { //弹出交互框，让用户输入，设置默认值为http://localhost:5000/ Endpoint = Prompt.GetString("Specify the endpoint:", "http://localhost:5000/") }; if (!config.Endpoint.EndsWith("/")) { config.Endpoint += "/"; } var filePath = Path.Combine(directory, _fileName); using (var outputFile = new StreamWriter(filePath, false, Encoding.UTF8)) { outputFile.WriteLine(JsonConvert.SerializeObject(config, Formatting.Indented)); } _console.WriteLine($"Config saved in {filePath}."); } public Config Get() { var filePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), _directoryName, _fileName); if (File.Exists(filePath)) { var content = File.ReadAllText(filePath); try { var config = JsonConvert.DeserializeObject(content); return config; } catch { _console.WriteLine("The config is invalid, please use 'config set' command to reset one."); } } else { _console.WriteLine("Config is not existed, please use 'config set' command to set one."); } return null; } }

 public interface IItemClient { Task Create(ItemForm form); Task Get(string id); Task List(); Task Delete(string id); } public class ItemClient : IItemClient { public HttpClient Client { get; } public ItemClient(HttpClient client, IConfigService configService) { var config = configService.Get(); if (config == null) { return; } client.BaseAddress = new Uri(config.Endpoint); Client = client; } public async Task Create(ItemForm form) { var content = new StringContent(JsonConvert.SerializeObject(form), Encoding.UTF8, "application/json"); var result = await Client.PostAsync("/api/items", content); if (result.IsSuccessStatusCode) { var stream = await result.Content.ReadAsStreamAsync(); var item = Deserialize(stream); return $"Item created, info:{item}"; } return "Error occur, please again later."; } public async Task Get(string id) { var result = await Client.GetAsync($"/api/items/{id}"); if (result.IsSuccessStatusCode) { var stream = await result.Content.ReadAsStreamAsync(); var item = Deserialize(stream); var response = new StringBuilder(); response.AppendLine($"{"Id".PadRight(40, ' ')}{"Name".PadRight(20, ' ')}Age"); response.AppendLine($"{item.Id.PadRight(40, ' ')}{item.Name.PadRight(20, ' ')}{item.Age}"); return response.ToString(); } return "Error occur, please again later."; } public async Task List() { var result = await Client.GetAsync($"/api/items"); if (result.IsSuccessStatusCode) { var stream = await result.Content.ReadAsStreamAsync(); var items = Deserialize>(stream); var response = new StringBuilder(); response.AppendLine($"{"Id".PadRight(40, ' ')}{"Name".PadRight(20, ' ')}Age"); if (items != null && items.Count > 0) { foreach (var item in items) { response.AppendLine($"{item.Id.PadRight(40, ' ')}{item.Name.PadRight(20, ' ')}{item.Age}"); } } return response.ToString(); } return "Error occur, please again later."; } public async Task Delete(string id) { var result = await Client.DeleteAsync($"/api/items/{id}"); if (result.IsSuccessStatusCode) { return $"Item {id} deleted."; } if (result.StatusCode == HttpStatusCode.NotFound) { return $"Item {id} not found."; } return "Error occur, please again later."; } private static T Deserialize(Stream stream) { using var reader = new JsonTextReader(new StreamReader(stream)); var serializer = new JsonSerializer(); return (T)serializer.Deserialize(reader, typeof(T)); } }

 　 　　 Exe 　　 netcoreapp3.1 　　 api-cli 　　

 cd src/NetCoreCLI

 　dotnet publish -c Release -r linux-x64 /p:PublishSingleFile=true

 dotnet pub
                
提示：
                    本文由神整理自网络，如有侵权请联系本站删除！
                    

                    本站声明： 

                    1、本站所有资源均来源于互联网，不保证100%完整、不提供任何技术支持； 

                    2、本站所发布的文章以及附件仅限用于学习和研究目的;不得将用于商业或者非法用途；否则由此产生的法律后果，本站概不负责！
                
                

                

                                            
上一篇：把.net Core 项目迁移到VS2019 for MAC的方法步骤_实用技巧_
                                                                
下一篇：.net Core 3.0 WebApi 创建Linux守护进程的方法_实用技巧_