JSONP fixes

Author: fileformat

Dockerfile

@@ -13,11 +13,16 @@ RUN dotnet publish -c Release
 
 RUN find .
 
-#CMD ["/source/bin/Release/net8.0/publish/regexplanet-dotnet.dll"]
 #
 # final image
 #
 FROM mcr.microsoft.com/dotnet/aspnet:8.0-noble-chiseled-extra
+
+ARG COMMIT="(not set)"
+ARG LASTMOD="(not set)"
+ENV COMMIT=$COMMIT
+ENV LASTMOD=$LASTMOD
+
 WORKDIR /app
 COPY --from=builder /source/bin/Release/net8.0/publish /app
 COPY ./wwwroot /app/wwwroot

Program.cs

@@ -1,66 +1,77 @@
-using System.Text.Json;
-using Microsoft.AspNetCore.HttpLogging;
-
-var builder = WebApplication.CreateBuilder(args);
-builder.Services.AddHttpLogging(logging =>
-{
-    logging.LoggingFields = HttpLoggingFields.All;
-    logging.CombineLogs = true;
-});
-
-var app = builder.Build();
-
-app.UseHttpLogging();
-
-app.UseStaticFiles();
-
-app.MapGet("/", () => "Running!");
-app.MapGet("/status.json", IResult (HttpContext theContext) =>
-{
-    var statusResult = new StatusResult(true, 
-        $".NET {Environment.Version}", 
-        Environment.Version.ToString(),
-        DateTime.UtcNow.ToString("o"),
-        Environment.GetEnvironmentVariable("LASTMOD") ?? "(local)",
-        Environment.GetEnvironmentVariable("COMMIT") ?? "(local)"
-    );
-
-    var callback = theContext.Request.Query["callback"];
-    if (string.IsNullOrEmpty(callback)) {
-        return Results.Json(statusResult);
-    }
-    string json = JsonSerializer.Serialize(statusResult);
-    return Results.Content($"{callback}({json});", "application/javascript");
-});
-
-app.MapPost("/test.json", static async (HttpContext theContext) =>
-{   
-    // read form variables
-    var form = await theContext.Request.ReadFormAsync();
-    var regex = form["regex"].FirstOrDefault();
-    var replacement = form["replacement"].FirstOrDefault();
-    var input = form["input"].ToArray() ?? new string[] { };
-
-    var html = $"{regex} {replacement} {input.Length} {input.FirstOrDefault()}";
-
-    var testOutput = new TestOutput(true, html);
-
-    var callback = theContext.Request.Query["callback"];
-    if (string.IsNullOrEmpty(callback)) {
-        return Results.Json(testOutput);
-    }
-    string json = JsonSerializer.Serialize(testOutput);
-    return Results.Content($"{callback}({json});", "application/javascript");
-});
-
-var hostname = Environment.GetEnvironmentVariable("HOSTNAME") ?? "0.0.0.0";
-var port = Environment.GetEnvironmentVariable("PORT") ?? "4000";
-var url = $"http://{hostname}:{port}";
-
-app.Logger.LogInformation($"App started on {url}", url); 
-
-app.Run(url);
-
-record StatusResult(Boolean success, string tech, string version, string timestamp, string lastmod, string commit);
-record TestOutput(Boolean success, string html);
-
+using System.Text.Json;
+using Microsoft.AspNetCore.HttpLogging;
+
+static async Task<bool> handleJsonp(HttpContext theContext, object data)
+{
+    string jsonStr = JsonSerializer.Serialize(data);
+
+    var response = theContext.Response;
+    var callback = theContext.Request.Query["callback"];
+    theContext.Response.Clear();
+    if (string.IsNullOrEmpty(callback))
+    {
+        response.ContentType = "application/json";
+        response.Headers.Append("Access-Control-Allow-Origin", "*");
+        response.Headers.Append("Access-Control-Allow-Methods", "GET");
+        response.Headers.Append("Access-Control-Max-Age", "604800");
+        await response.WriteAsync(jsonStr);
+    } else {
+        response.ContentType = "text/javascript; charset=utf-8";
+        await response.WriteAsync($"{callback}({jsonStr});");
+    }
+    return true;
+}
+
+var builder = WebApplication.CreateBuilder(args);
+builder.Services.AddHttpLogging(logging =>
+{
+    logging.LoggingFields = HttpLoggingFields.All;
+    logging.CombineLogs = true;
+});
+
+var app = builder.Build();
+
+app.UseHttpLogging();
+
+app.UseStaticFiles();
+
+app.MapGet("/", () => "Running!");
+app.MapGet("/status.json", static async (HttpContext theContext) =>
+{
+    var statusResult = new StatusResult(true, 
+        $".NET {Environment.Version}", 
+        Environment.Version.ToString(),
+        DateTime.UtcNow.ToString("o"),
+        Environment.GetEnvironmentVariable("LASTMOD") ?? "(local)",
+        Environment.GetEnvironmentVariable("COMMIT") ?? "(local)"
+    );
+
+    await handleJsonp(theContext, statusResult);
+});
+
+app.MapPost("/test.json", static async (HttpContext theContext) =>
+{   
+    // read form variables
+    var form = await theContext.Request.ReadFormAsync();
+    var regex = form["regex"].FirstOrDefault();
+    var replacement = form["replacement"].FirstOrDefault();
+    var input = form["input"].ToArray() ?? new string[] { };
+
+    var html = $"{regex} {replacement} {input.Length} {input.FirstOrDefault()}";
+
+    var testOutput = new TestOutput(true, html);
+
+    await handleJsonp(theContext, testOutput);
+});
+
+var hostname = Environment.GetEnvironmentVariable("HOSTNAME") ?? "0.0.0.0";
+var port = Environment.GetEnvironmentVariable("PORT") ?? "4000";
+var url = $"http://{hostname}:{port}";
+
+app.Logger.LogInformation($"App started on {url}", url); 
+
+app.Run(url);
+
+record StatusResult(Boolean success, string tech, string version, string timestamp, string lastmod, string commit);
+record TestOutput(Boolean success, string html);
+