HttpClient/HttpRequestMessage 接受头参数不能有空格 [英] HttpClient / HttpRequestMessage accept header parameters cannot have spaces

问题描述

我正在处理一个 API，它要求我设置标头 application/json;masked=false 以取消屏蔽某些信息.使用

I'm dealing with an API that requires me to set the header application/json;masked=false in order to unmask some information. When setting the header using

var request = new HttpRequestMessage()
request.Headers.Add("Accept", "application/json;masked=false");

看起来好像在 ; 和 masked 之间添加了一个空格，使得输出头 application/json;掩码=假.不幸的是，我正在使用的这个 API 似乎只检查没有空格的文字 application/json;masked=false.我知道标题有效，因为如果我在邮递员中没有空格的情况下使用它，它可以正常工作.如果我使用在邮递员中生成的 C#，则不会.

it appears as though a space is being added between the ; and masked making the output header application/json; masked=false. Unfortunately this API I'm working with appears to be checking only against the literal application/json;masked=false without the space. I know the header works, because if I use it without the space in postman it works fine. If I use the one C# is generating in postman, it does not.

有什么办法可以覆盖这种行为吗?

Is there any way to override this behavior?

谢谢

推荐答案

好吧，经过一番挖掘，我们最终找到了这个问题的github issue:https://github.com/dotnet/corefx/issues/18449 他们有一个使用反射的解决方法.

Alright, so through some digging, we ended up finding this github issue for the problem: https://github.com/dotnet/corefx/issues/18449 where they have a workaround which uses reflection.

我采用了他们的解决方法来处理我正在做的事情:

I adopted their workaround to what I'm doing like so:

        request.Headers.Add("Accept", contentType);
        foreach (var v in request.Headers.Accept)
        {
            if (v.MediaType.Contains("application/json"))
            {
                var field = v.GetType().GetTypeInfo().BaseType.GetField("_mediaType", BindingFlags.NonPublic | BindingFlags.Instance);
                field.SetValue(v, "application/json;masked=false");
                v.Parameters.Clear();
            }
        }

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