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+using System.Collections.Generic; +using System.Data; +using System.Linq; +using System.Net.WebSockets; +using System.Threading.Tasks; +using MySql.Data.MySqlClient; + +namespace QNet.CnDistricts +{ + public static class Data + { + private const int MaxLevel = 4; // 最高有多少层级 + + // 查询时间复杂度O(1) + private static readonly Dictionary _DicAll = new Dictionary(46473);//总条数 + + // 缓存父子集关系，方便查询 + private static readonly Dictionary _DicPSubset = new Dictionary(); + + private static void LoadFromDb() + { + var strConn = "server=192.168.86.101;port=3306;database=division_cn; uid=root;pwd=123456;charset=utf8mb4"; + using (var conn = new MySqlConnection(strConn)) + { + conn.Open(); + var cmd = new MySqlCommand("SELECT * FROM district", conn); + var dr = cmd.ExecuteReader(); + while (dr.Read()) + { + var district = new District(); + district.Id = dr.GetInt64(0); + district.Pid = dr.GetInt64(1); + district.Name = dr.GetString(2); + + _DicAll.Add(district.Id, district); + } + } + } + + private static void SetDicPSubset(long pid = 0, int level = 1) + { + var subDistricts = _DicAll.Values.Where(x => x.Pid == pid).ToArray(); + + if (subDistricts.Any()) + { + _DicPSubset.Add(pid, subDistricts); + + // 最后一层级没有子集，不要跑递归了，数据多，极其浪费时间~ + if (level < MaxLevel) + { + foreach (var item in subDistricts) + { + SetDicPSubset(item.Id, level + 1); + } + } + + } + } + + public static void Load() + { + LoadFromDb(); + SetDicPSubset(); + } + + public static Dictionary.ValueCollection GetAll() + { + return _DicAll.Values; + } + + public static District[] GetByPid(long pid) + { + District[] districts; + + _DicPSubset.TryGetValue(pid, out districts); + + return districts.ToArray(); + } + + public static List GetById(List ids) + { + var districts = new List(); + foreach (var id in ids) + { + District v; + if (_DicAll.TryGetValue(id, out v)) + districts.Add(v); + } + + return districts; + } + } +} diff --git a/QNet.CnDistricts/Handlers/Common.cs b/QNet.CnDistricts/Handlers/Common.cs new file mode 100644 index 0000000..922934c --- /dev/null +++ b/QNet.CnDistricts/Handlers/Common.cs @@ -0,0 +1,38 @@ +using System; +using System.Collections.Generic; +using System.Linq; +using System.Text.Json; +using System.Threading.Tasks; + +using Microsoft.AspNetCore.Http; +using Microsoft.Extensions.Primitives; + +namespace QNet.CnDistricts +{ + public partial class Handler + { + private static readonly JsonSerializerOptions _JsonSerializerOptions; + static Handler() + { + _JsonSerializerOptions = new JsonSerializerOptions(); + _JsonSerializerOptions.Encoder = System.Text.Encodings.Web.JavaScriptEncoder.Create(System.Text.Unicode.UnicodeRanges.All); + } + + private static bool IsLastModifiedExpires(HttpContext context, int expires = 60) + { + var headerValue = context.Request.Headers["If-Modified-Since"]; + if (!StringValues.IsNullOrEmpty(headerValue)) + { + DateTime modifiedSince; + + if (DateTime.TryParse(headerValue.ToString(), out modifiedSince)) + { + return modifiedSince.ToLocalTime().AddSeconds(expires) < DateTime.Now; + } + } + + return true; + + } + } +} diff --git a/QNet.CnDistricts/Handlers/Home.cs b/QNet.CnDistricts/Handlers/Home.cs new file mode 100644 index 0000000..9912259 --- /dev/null +++ b/QNet.CnDistricts/Handlers/Home.cs @@ -0,0 +1,41 @@ +using System; +using System.Collections.Generic; +using System.Linq; +using System.Threading.Tasks; +using Microsoft.AspNetCore.Http; + +namespace QNet.CnDistricts +{ + public partial class Handler + { + public static async Task Home(HttpContext context) + { + if (!IsLastModifiedExpires(context)) + { + context.Response.StatusCode = (int)System.Net.HttpStatusCode.NotModified; + return; + } + + const string html = @" +接口说明 + + +/s +获取所有区域数据 + + +/s?pid= +通过 pid 获取子区域数据 +例如，获取所有省：/s?pid=0 + + +/s?id= +通过 id 获取区域数据，可以用 , 分隔 +例如，获取指定地区数据：/s?id=44,4403,440305 +"; + context.Response.ContentType = "text/plain;charset=UTF-8"; + context.Response.Headers.Add("Last-Modified", DateTime.Now.ToUniversalTime().ToString("R")); + await context.Response.WriteAsync(html); + } + } +} diff --git a/QNet.CnDistricts/Handlers/Search.cs b/QNet.CnDistricts/Handlers/Search.cs new file mode 100644 index 0000000..f825f99 --- /dev/null +++ b/QNet.CnDistricts/Handlers/Search.cs @@ -0,0 +1,72 @@ +using System; +using System.Collections.Generic; +using System.ComponentModel.DataAnnotations; +using System.Linq; +using System.Text.Json; +using System.Threading.Tasks; +using Microsoft.AspNetCore.Http; +using Microsoft.Extensions.Primitives; + +namespace QNet.CnDistricts +{ + public partial class Handler + { + public static async Task Search(HttpContext context) + { + if (!IsLastModifiedExpires(context)) + { + context.Response.StatusCode = (int)System.Net.HttpStatusCode.NotModified; + return; + } + + + object jsonData = null; + if (context.Request.Query.Count == 0) + { + // 返回所有 + jsonData = Data.GetAll(); + } + else + { + StringValues p; + if (context.Request.Query.TryGetValue("pid", out p)) + { + if (!StringValues.IsNullOrEmpty(p)) + { + long pid; + if (long.TryParse(p.ToString(), out pid)) + { + if (pid > -1) + jsonData = Data.GetByPid(pid); + } + } + } + else if (context.Request.Query.TryGetValue("id", out p)) + { + if (!StringValues.IsNullOrEmpty(p)) + { + var ids = new List(); + foreach (var item in p.ToString().Split(",")) + { + long id; + if (long.TryParse(item, out id)) + { + if (id > 0) + ids.Add(id); + } + } + + if (ids.Any()) + { + jsonData = Data.GetById(ids); + } + } + } + } + + context.Response.ContentType = "application/json;"; + context.Response.Headers.Add("Last-Modified", DateTime.Now.ToUniversalTime().ToString("R")); + await context.Response.BodyWriter.WriteAsync(JsonSerializer.SerializeToUtf8Bytes(jsonData, _JsonSerializerOptions)); + } + } +} diff --git a/QNet.CnDistricts/Models/District.cs b/QNet.CnDistricts/Models/District.cs new file mode 100644 index 0000000..de3fa07 --- /dev/null +++ b/QNet.CnDistricts/Models/District.cs @@ -0,0 +1,16 @@ +using System; +using System.Collections.Generic; +using System.Linq; +using System.Threading.Tasks; + +namespace QNet.CnDistricts +{ + public class District + { + public long Id { get; set; } + + public long Pid { get; set; } + + public string Name { get; set; } + } +} diff --git a/QNet.CnDistricts/Program.cs b/QNet.CnDistricts/Program.cs new file mode 100644 index 0000000..db4bc77 --- /dev/null +++ b/QNet.CnDistricts/Program.cs @@ -0,0 +1,26 @@ +using System; +using System.Collections.Generic; +using System.Linq; +using System.Threading.Tasks; +using Microsoft.AspNetCore.Hosting; +using Microsoft.Extensions.Configuration; +using Microsoft.Extensions.Hosting; +using Microsoft.Extensions.Logging; + +namespace QNet.CnDistricts +{ + public class Program + { + public static void Main(string[] args) + { + CreateHostBuilder(args).Build().Run(); + } + + public static IHostBuilder CreateHostBuilder(string[] args) => + Host.CreateDefaultBuilder(args) + .ConfigureWebHostDefaults(webBuilder => + { + webBuilder.UseStartup(); + }); + } +} diff --git a/QNet.CnDistricts/Properties/launchSettings.json b/QNet.CnDistricts/Properties/launchSettings.json new file mode 100644 index 0000000..38d8032 --- /dev/null +++ b/QNet.CnDistricts/Properties/launchSettings.json @@ -0,0 +1,27 @@ +{ + "iisSettings": { + "windowsAuthentication": false, + "anonymousAuthentication": true, + "iisExpress": { + "applicationUrl": "http://localhost:54804", + "sslPort": 0 + } + }, + "profiles": { + "IIS Express": { + "commandName": "IISExpress", + "launchBrowser": true, + "environmentVariables": { + "ASPNETCORE_ENVIRONMENT": "Development" + } + }, + "QNet.CnDistricts": { + "commandName": "Project", + "launchBrowser": true, + "applicationUrl": "http://localhost:5000", + "environmentVariables": { + "ASPNETCORE_ENVIRONMENT": "Development" + } + } + } +} diff --git a/QNet.CnDistricts/QNet.CnDistricts.csproj b/QNet.CnDistricts/QNet.CnDistricts.csproj new file mode 100644 index 0000000..4237e06 --- /dev/null +++ b/QNet.CnDistricts/QNet.CnDistricts.csproj @@ -0,0 +1,11 @@ + + + + netcoreapp3.1 + + + + + + + diff --git a/QNet.CnDistricts/Startup.cs b/QNet.CnDistricts/Startup.cs new file mode 100644 index 0000000..844943a --- /dev/null +++ b/QNet.CnDistricts/Startup.cs @@ -0,0 +1,46 @@ +using System; +using System.Collections.Generic; +using System.Linq; +using System.Threading.Tasks; +using Microsoft.AspNetCore.Builder; +using Microsoft.AspNetCore.Hosting; +using Microsoft.AspNetCore.Http; +using Microsoft.Extensions.DependencyInjection; +using Microsoft.Extensions.DependencyInjection.Extensions; +using Microsoft.Extensions.Hosting; + +namespace QNet.CnDistricts +{ + public class Startup + { + // This method gets called by the runtime. Use this method to add services to the container. + // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940 + public void ConfigureServices(IServiceCollection services) + { + } + + // This method gets called by the runtime. Use this method to configure the HTTP request pipeline. + public void Configure(IApplicationBuilder app, IWebHostEnvironment env, IHostApplicationLifetime appLifeTime) + { + if (env.IsDevelopment()) + { + app.UseDeveloperExceptionPage(); + } + + app.UseRouting(); + + app.UseEndpoints(endpoints => + { + endpoints.MapGet("/", Handler.Home); + endpoints.MapGet("/s", Handler.Search); + }); + + + + appLifeTime.ApplicationStarted.Register(() => + { + Data.Load(); + }); + } + } +} diff --git a/QNet.CnDistricts/appsettings.Development.json b/QNet.CnDistricts/appsettings.Development.json new file mode 100644 index 0000000..8983e0f --- /dev/null +++ b/QNet.CnDistricts/appsettings.Development.json @@ -0,0 +1,9 @@ +{ + "Logging": { + "LogLevel": { + "Default": "Information", + "Microsoft": "Warning", + "Microsoft.Hosting.Lifetime": "Information" + } + } +} diff --git a/QNet.CnDistricts/appsettings.json b/QNet.CnDistricts/appsettings.json new file mode 100644 index 0000000..d9d9a9b --- /dev/null +++ b/QNet.CnDistricts/appsettings.json @@ -0,0 +1,10 @@ +{ + "Logging": { + "LogLevel": { + "Default": "Information", + "Microsoft": "Warning", + "Microsoft.Hosting.Lifetime": "Information" + } + }, + "AllowedHosts": "*" +} diff --git a/README.md b/README.md new file mode 100644 index 0000000..0b7c38e --- /dev/null +++ b/README.md @@ -0,0 +1,37 @@ +# 中国省市区街道四级联动 + +## 目标 + +很多项目需要在填写地址中选省市区，本项目希望成为众多项目中的一个微服务~ + + +## Web 框架选择 + +按：https://www.techempower.com/benchmarks 2020-05-28 的 Round 19 中 + +`Fortunes` 的权重比 `Plaintext` 高，因为 `Fortunes` 是一种更现实的测试类型， +但本项目业务极其简单，基本上只是查询，一年中也不会有几次修改，所以选择 `Plaintext(代表响应性能)` 第一的 Asp.Net Core 框架~ + + + +## 数据来源 + +https://github.com/modood/Administrative-divisions-of-China + +创建数据库，创建表 **district** + +| 字段 | 类型 | 是否是主键 | 注释 | +| ---- | --------------------- | ---------- | ------------ | +| id | bigint NOT NULL | 是 | 地区编码 | +| pid | bigint NOT NULL | 否 | 上级地区编码 | +| name | varchar(255) NOT NULL | 否 | 地区名称 | + + +``` sql +CREATE TABLE `district_cn`.`district` ( + `id` bigint NOT NULL COMMENT '地区编码', + `pid` bigint NOT NULL COMMENT '上级地区编码', + `name` varchar(255) NOT NULL COMMENT '地区名称', + PRIMARY KEY (`Id`) +); +``` \ No newline at end of file