From 06f9d0f382b9d84b563f421adda94e3771f12bf9 Mon Sep 17 00:00:00 2001
From: qschroter <qschroter@gpi-experts.com>
Date: Wed, 28 May 2025 12:41:37 +0200
Subject: [PATCH] add post as get middleware

---
 .github/workflows/publish-to-nuget.yml       |  2 +-
 src/Bones.AspNetCore/Bones.AspNetCore.csproj | 14 ++++
 src/Bones.AspNetCore/PostAsGetMiddleware.cs  | 75 ++++++++++++++++++++
 3 files changed, 90 insertions(+), 1 deletion(-)
 create mode 100644 src/Bones.AspNetCore/Bones.AspNetCore.csproj
 create mode 100644 src/Bones.AspNetCore/PostAsGetMiddleware.cs

diff --git a/.github/workflows/publish-to-nuget.yml b/.github/workflows/publish-to-nuget.yml
index 23c283e..557316d 100644
--- a/.github/workflows/publish-to-nuget.yml
+++ b/.github/workflows/publish-to-nuget.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        folder: [Bones, Bones.Akka, Bones.Converters, Bones.Flow, Bones.Grpc, Bones.Tests, Bones.X509, Bones.Akka.Monitoring, Bones.Monitoring]
+        folder: [Bones, Bones.Akka, Bones.AspNetCore, Bones.Converters, Bones.Flow, Bones.Grpc, Bones.Tests, Bones.X509, Bones.Akka.Monitoring, Bones.Monitoring]
     steps:
       # Checking out repository
       - name: Checkout 🛎️
diff --git a/src/Bones.AspNetCore/Bones.AspNetCore.csproj b/src/Bones.AspNetCore/Bones.AspNetCore.csproj
new file mode 100644
index 0000000..b87c7f0
--- /dev/null
+++ b/src/Bones.AspNetCore/Bones.AspNetCore.csproj
@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <ItemGroup>
+    <ProjectReference Include="..\Bones.Monitoring\Bones.Monitoring.csproj" />
+  </ItemGroup>
+
+  <PropertyGroup>
+    <TargetFramework>net7.0</TargetFramework>
+    <Version>$(VERSION)</Version>
+    <Authors>dative-gpi</Authors>
+    <Company>dative-gpi</Company>
+  </PropertyGroup>
+
+</Project>
diff --git a/src/Bones.AspNetCore/PostAsGetMiddleware.cs b/src/Bones.AspNetCore/PostAsGetMiddleware.cs
new file mode 100644
index 0000000..b62a152
--- /dev/null
+++ b/src/Bones.AspNetCore/PostAsGetMiddleware.cs
@@ -0,0 +1,75 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Primitives;
+
+using Bones.Monitoring.Core;
+
+namespace Bones.AspNetCore
+{
+    public class PostAsGetMiddleware : MonitoredMiddleware
+    {
+        public PostAsGetMiddleware(
+            IServiceProvider serviceProvider,
+            RequestDelegate next) : base(next, serviceProvider)
+        {
+        }
+
+        protected override async Task HandleAsync(HttpContext context, RequestDelegate next)
+        {
+            if (context.Request.Method == "POST"
+                && context.Request.Query.ContainsKey("_method")
+                && context.Request.Query["_method"] == "GET"
+                && context.Request.HasJsonContentType())
+            {
+                // Convert the request to a GET request
+                context.Request.Method = "GET";
+                var doc = await JsonSerializer.DeserializeAsync<Dictionary<string, JsonElement>>(context.Request.Body);
+                if (doc != null)
+                {
+                    var props = Flat(doc);
+                    var query = $"?{String.Join("&", props.Select(kv => $"{Uri.EscapeDataString(kv.Key)}={Uri.EscapeDataString(kv.Value)}"))}";
+                    context.Request.QueryString = new QueryString(query);
+                    context.Request.Body = Stream.Null;
+                    context.Request.ContentLength = 0;
+                }
+            }
+            await next(context);
+            return;
+        }
+
+        private Dictionary<string, StringValues> Flat(Dictionary<string, JsonElement> payload)
+        {
+            Dictionary<string, StringValues> result = new Dictionary<string, StringValues>();
+            foreach (var item in payload)
+            {
+                var flatted = DeepFlat(item.Key, item.Value);
+                foreach (var flat in flatted)
+                {
+                    result.Add(flat.Key, flat.Value);
+                }
+            }
+            return result;
+        }
+
+        private IEnumerable<KeyValuePair<string, string>> DeepFlat(string key, JsonElement value)
+        {
+            switch (value.ValueKind)
+            {
+                case JsonValueKind.Array when value.GetArrayLength() == 0:
+                    return new[] { new KeyValuePair<string, string>($"{key}[]", "") };
+                case JsonValueKind.Array when value.GetArrayLength() != 0:
+                    return value.EnumerateArray().SelectMany((item, index) => DeepFlat($"{key}[{index}]", item));
+                case JsonValueKind.Object:
+                    return value.EnumerateObject().SelectMany(prop => DeepFlat($"{key}.{prop.Name}", prop.Value));
+                default:
+                    return new[] { new KeyValuePair<string, string>(key, value.ToString()) };
+            }
+        }
+    }
+}