intials app

lstWrapper/Program_proxy_backend.txt

@@ -0,0 +1,65 @@
+var builder = WebApplication.CreateBuilder(args);
+
+// Configure clients
+builder.Services.AddHttpClient("GoBackend", client => {
+    client.BaseAddress = new Uri("http://localhost:8080");
+});
+
+var app = builder.Build();
+
+// Handle trailing slash redirects
+app.Use(async (context, next) => {
+    if (context.Request.Path.Equals("/lst", StringComparison.OrdinalIgnoreCase)) {
+        context.Response.Redirect("/lst/", permanent: true);
+        return;
+    }
+    await next();
+});
+
+// Proxy all requests to Go backend
+app.Use(async (context, next) => {
+    // Skip special paths
+    if (context.Request.Path.StartsWithSegments("/.well-known")) {
+        await next();
+        return;
+    }
+
+    var client = context.RequestServices.GetRequiredService<IHttpClientFactory>()
+        .CreateClient("GoBackend");
+    
+    try {
+        var request = new HttpRequestMessage(
+            new HttpMethod(context.Request.Method),
+            context.Request.Path + context.Request.QueryString);
+
+        // Copy headers
+        foreach (var header in context.Request.Headers) {
+            if (!request.Headers.TryAddWithoutValidation(header.Key, header.Value.ToArray())) {
+                request.Content ??= new StreamContent(context.Request.Body);
+                request.Content.Headers.TryAddWithoutValidation(header.Key, header.Value.ToArray());
+            }
+        }
+
+        if (context.Request.ContentLength > 0) {
+            request.Content = new StreamContent(context.Request.Body);
+        }
+
+        var response = await client.SendAsync(request);
+        context.Response.StatusCode = (int)response.StatusCode;
+        
+        foreach (var header in response.Headers) {
+            context.Response.Headers[header.Key] = header.Value.ToArray();
+        }
+
+        if (response.Content.Headers.ContentType != null) {
+            context.Response.ContentType = response.Content.Headers.ContentType.ToString();
+        }
+
+        await response.Content.CopyToAsync(context.Response.Body);
+    }
+    catch (HttpRequestException) {
+        context.Response.StatusCode = 502;
+    }
+});
+
+app.Run();