HttpRequest Clone 相关

Shared/Extensions/WebExtensions.cs

@@ -0,0 +1,42 @@
+namespace MeloongCore.Extensions;
+public static class WebExtensions {
+
+    // Source - https://stackoverflow.com/a/46026230, Posted by desautelsj, Retrieved 2026-06-14, License - CC BY-SA 4.0
+    public static HttpRequestMessage Clone(this HttpRequestMessage request) {
+        var clone = new HttpRequestMessage(request.Method, request.RequestUri) {
+            Content = request.Content.Clone(),
+            Version = request.Version
+        };
+        foreach (KeyValuePair<string, object> prop in request.Properties) clone.Properties.Add(prop);
+        foreach (KeyValuePair<string, IEnumerable<string>> header in request.Headers) clone.Headers.TryAddWithoutValidation(header.Key, header.Value);
+        return clone;
+    }
+    public static async Task<HttpRequestMessage> CloneAsync(this HttpRequestMessage request) {
+        var clone = new HttpRequestMessage(request.Method, request.RequestUri) {
+            Content = await request.Content.CloneAsync().ConfigureAwait(false),
+            Version = request.Version
+        };
+        foreach (KeyValuePair<string, object> prop in request.Properties) clone.Properties.Add(prop);
+        foreach (KeyValuePair<string, IEnumerable<string>> header in request.Headers) clone.Headers.TryAddWithoutValidation(header.Key, header.Value);
+        return clone;
+    }
+    public static HttpContent? Clone(this HttpContent? content) {
+        if (content == null) return null;
+        var ms = new MemoryStream();
+        content.CopyToAsync(ms).Wait();
+        ms.Position = 0;
+        var clone = new StreamContent(ms);
+        foreach (KeyValuePair<string, IEnumerable<string>> header in content.Headers) clone.Headers.Add(header.Key, header.Value);
+        return clone;
+    }
+    public static async Task<HttpContent?> CloneAsync(this HttpContent? content) {
+        if (content == null) return null;
+        var ms = new MemoryStream();
+        await content.CopyToAsync(ms).ConfigureAwait(false);
+        ms.Position = 0;
+        var clone = new StreamContent(ms);
+        foreach (KeyValuePair<string, IEnumerable<string>> header in content.Headers) clone.Headers.Add(header.Key, header.Value);
+        return clone;
+    }
+
+}