rewrite-5 – C# (Csharp) 프로그래밍


using Microsoft.AspNetCore.Hosting; //IWebHostBuilder
using Microsoft.AspNetCore.Builder; //IApplicationBuilder
using Microsoft.AspNetCore.Http; //WriteAsync
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Routing;
using Microsoft.AspNetCore.Rewrite; //UseRewriter
using System;
using System.Net;
using Microsoft.Net.Http.Headers;
using System.IO;


namespace WebApplication1
{

    public class ExtensionRedirection : IRule
    {
        readonly string _extension;
        readonly PathString _newPath;

        public ExtensionRedirection(string extension, string newPath)
        {
            _extension = extension;
            _newPath = new PathString(newPath);
        }

        public void ApplyRule(RewriteContext context)
        {
            var request = context.HttpContext.Request;

            // Because we're redirecting back to the same app, stop processing if the request has already been redirected
            // This is to prevent crazy loop. Try it, comment below code and you are going to crash.
            if (request.Path.StartsWithSegments(new PathString(_newPath)))
            {
                return;
            }

            if (request.Path.Value.EndsWith(_extension, StringComparison.OrdinalIgnoreCase))
            {
                var response = context.HttpContext.Response;
                response.StatusCode = StatusCodes.Status301MovedPermanently;
                context.Result = RuleResult.EndResponse;
                response.Headers[HeaderNames.Location] = _newPath + request.Path + request.QueryString;
            }
        }
    }


    public class Startup
    {
        public Startup(IHostingEnvironment env, ILoggerFactory logger)
        {
        }

        public void ConfigureServices(IServiceCollection services)
        {
            //This is the only service available at ConfigureServices
            services.AddRouting();
        }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory logger)
        {
            var options = new RewriteOptions()
               .Add(new ExtensionRedirection(".png", "/images/png"))
               .Add(new ExtensionRedirection(".jpg", "/images/jpeg"));

            app.UseRewriter(options);

            app.UseStaticFiles();

            var routes = new RouteBuilder(app);
            routes.MapGet("", async context => {
                context.Response.Headers.Add("content-type", "text/html");
                var path = context.Request.Query["Path"];
                var ext = context.Request.Query["Ext"];
                await context.Response.WriteAsync($"<h1>Extension Based Redirection</h1><img src=\"ryan-wong-25025.jpg\" /> <br/> <img src=\"Acorn_PNG744.png\" />");
               
            });

            app.UseRouter(routes.Build());
        }
    }

    public class Program
        {
            public static void Main(string[] args)
            {
                CreateWebHostBuilder(args).Build().Run();
            }

        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>()
                .UseEnvironment("Development");
        }
}

100

using Microsoft.AspNetCore.Hosting; //IWebHostBuilder

using Microsoft.AspNetCore.Builder; //IApplicationBuilder

using Microsoft.AspNetCore.Http; //WriteAsync

using Microsoft.Extensions.DependencyInjection;

using Microsoft.Extensions.Logging;

using Microsoft.AspNetCore;

using Microsoft.AspNetCore.Routing;

using Microsoft.AspNetCore.Rewrite; //UseRewriter

using System;

using System.Net;

using Microsoft.Net.Http.Headers;

using System.IO;

namespace WebApplication1

{

public class ExtensionRedirection : IRule

{

readonly string _extension;

readonly PathString _newPath;

public ExtensionRedirection(string extension, string newPath)

{

_extension = extension;

_newPath = new PathString(newPath);

}

public void ApplyRule(RewriteContext context)

{

var request = context.HttpContext.Request;

// Because we're redirecting back to the same app, stop processing if the request has already been redirected

// This is to prevent crazy loop. Try it, comment below code and you are going to crash.

if (request.Path.StartsWithSegments(new PathString(_newPath)))

{

return;

}

if (request.Path.Value.EndsWith(_extension, StringComparison.OrdinalIgnoreCase))

{

var response = context.HttpContext.Response;

response.StatusCode = StatusCodes.Status301MovedPermanently;

context.Result = RuleResult.EndResponse;

response.Headers[HeaderNames.Location] = _newPath + request.Path + request.QueryString;

}

public class Startup

{

public Startup(IHostingEnvironment env, ILoggerFactory logger)

{

}

public void ConfigureServices(IServiceCollection services)

{

//This is the only service available at ConfigureServices

services.AddRouting();

}

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory logger)

{

var options = new RewriteOptions()

.Add(new ExtensionRedirection(".png", "/images/png"))

.Add(new ExtensionRedirection(".jpg", "/images/jpeg"));

app.UseRewriter(options);

app.UseStaticFiles();

var routes = new RouteBuilder(app);

routes.MapGet("", async context => {

context.Response.Headers.Add("content-type", "text/html");

var path = context.Request.Query["Path"];

var ext = context.Request.Query["Ext"];

await context.Response.WriteAsync($"<h1>Extension Based Redirection</h1><img src=\"ryan-wong-25025.jpg\" /> <br/> <img src=\"Acorn_PNG744.png\" />");

});

app.UseRouter(routes.Build());

}

public class Program

{

public static void Main(string[] args)

{

CreateWebHostBuilder(args).Build().Run();

}

public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>

WebHost.CreateDefaultBuilder(args)

.UseStartup<Startup>()

.UseEnvironment("Development");

}

결과 :

Extension Based Redirection
[이미지] //생략
[이미지] //생략