feat(pathbase): Add support for app.UsePathBase

appveyor.yml

@@ -1,4 +1,4 @@
-image: Visual Studio 2019
+image: Visual Studio 2022
 
 install:
   - ps: Invoke-WebRequest "https://dot.net/v1/dotnet-install.ps1" -OutFile "./dotnet-install.ps1"

src/Directory.Build.props

@@ -10,7 +10,7 @@
 		<PublishRepositoryUrl>true</PublishRepositoryUrl>
 		<RepositoryType>git</RepositoryType>
 		<RepositoryUrl>https://github.com/domaindrivendev/Swashbuckle.AspNetCore.git</RepositoryUrl>
-		<VersionPrefix>6.5.0</VersionPrefix>
+		<VersionPrefix>6.6.0</VersionPrefix>
 		<LangVersion>9</LangVersion>
 	</PropertyGroup>
 

src/Swashbuckle.AspNetCore.SwaggerUI/SwaggerUIMiddleware.cs

@@ -53,11 +53,33 @@ public class SwaggerUIMiddleware
 
         public async Task Invoke(HttpContext httpContext)
         {
+            if (!string.IsNullOrWhiteSpace(_options.PathBase)
+                && (!httpContext.Request.PathBase.HasValue
+                 || !httpContext.Request.PathBase.Value.Equals(_options.PathBase, StringComparison.OrdinalIgnoreCase)))
+            {
+                await _staticFileMiddleware.Invoke(httpContext);
+                return;
+            }
+
             var httpMethod = httpContext.Request.Method;
-            var path = httpContext.Request.Path.Value;
+            string path;
+            string routePrefix;
+
+            if (!string.IsNullOrWhiteSpace(_options.PathBase)
+                && httpContext.Request.PathBase.HasValue
+                && httpContext.Request.PathBase.Value.Equals(_options.PathBase, StringComparison.OrdinalIgnoreCase))
+            {
+                path = string.Join("/", _options.PathBase.TrimEnd('/'), httpContext.Request.Path.Value.Trim('/'));
+                routePrefix = string.Join("/", _options.PathBase.Trim('/'), _options.RoutePrefix.Trim('/'));
+            }
+            else
+            {
+                path = httpContext.Request.Path.Value;
+                routePrefix = _options.RoutePrefix;
+            }
 
             // If the RoutePrefix is requested (with or without trailing slash), redirect to index URL
-            if (httpMethod == "GET" && Regex.IsMatch(path, $"^/?{Regex.Escape(_options.RoutePrefix)}/?$",  RegexOptions.IgnoreCase))
+            if (httpMethod == "GET" && Regex.IsMatch(path, $"^/?{Regex.Escape(routePrefix)}/?$",  RegexOptions.IgnoreCase))
             {
                 // Use relative redirect to support proxy environments
                 var relativeIndexUrl = string.IsNullOrEmpty(path) || path.EndsWith("/")
@@ -68,7 +90,7 @@ public async Task Invoke(HttpContext httpContext)
                 return;
             }
 
-            if (httpMethod == "GET" && Regex.IsMatch(path, $"^/{Regex.Escape(_options.RoutePrefix)}/?index.html$",  RegexOptions.IgnoreCase))
+            if (httpMethod == "GET" && Regex.IsMatch(path, $"^/{Regex.Escape(routePrefix)}/?index.html$",  RegexOptions.IgnoreCase))
             {
                 await RespondWithIndexHtml(httpContext.Response);
                 return;

src/Swashbuckle.AspNetCore.SwaggerUI/SwaggerUIOptions.cs

@@ -9,6 +9,12 @@ namespace Swashbuckle.AspNetCore.SwaggerUI
 {
     public class SwaggerUIOptions
     {
+        /// <summary>
+        /// Gets or sets the path base, as in app.UsePathBase()
+        /// </summary>
+        public string PathBase { get; set; } = "";
+
+
         /// <summary>
         /// Gets or sets a route prefix for accessing the swagger-ui
         /// </summary>