c# - 当原始请求有内容时如何克隆 HttpRequestMessage？

Question

我正在尝试使用此答案中概述的方法克隆请求: https://stackoverflow.com/a/18014515/406322

但是，如果原始请求有内容，我会得到一个 ObjectDisposedException。

如何可靠地克隆 HttpRequestMessage？

Answer 1

这应该可以解决问题:

    public static async Task<HttpRequestMessage> CloneHttpRequestMessageAsync(HttpRequestMessage req)
    {
        HttpRequestMessage clone = new HttpRequestMessage(req.Method, req.RequestUri);

        // Copy the request's content (via a MemoryStream) into the cloned object
        var ms = new MemoryStream();
        if (req.Content != null)
        {
            await req.Content.CopyToAsync(ms).ConfigureAwait(false);
            ms.Position = 0;
            clone.Content = new StreamContent(ms);

            // Copy the content headers
            foreach (var h in req.Content.Headers)
                clone.Content.Headers.Add(h.Key, h.Value);
        }


        clone.Version = req.Version;

        foreach (KeyValuePair<string, object?> option in req.Options)
            clone.Options.Set(new HttpRequestOptionsKey<object?>(option.Key), option.Value);

        foreach (KeyValuePair<string, IEnumerable<string>> header in req.Headers)
            clone.Headers.TryAddWithoutValidation(header.Key, header.Value);

        return clone;
    }