如何直接将大型JSON对象序列化为HttpResponseMessage流? [英] How to serialize a large JSON object directly to HttpResponseMessage stream?

问题描述

是否可以将大型JSON对象直接流式传输到HttpResponseMessage流?

Is there any way to stream a large JSON object directly to the HttpResponseMessage stream?

这是我现有的代码:

        Dictionary<string,string> hugeObject = new Dictionary<string,string>();
        // fill with 100,000 key/values.  Each string is 32 chars.
        HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
        response.Content = new StringContent(
            content: JsonConvert.SerializeObject(hugeObject),
            encoding: Encoding.UTF8,
            mediaType: "application/json");

对于较小的对象，它可以很好地工作.但是，调用JsonConvert.SerializeObject()将对象转换为字符串的过程会导致大型对象出现问题的内存峰值.

Which works fine for smaller objects. However, the process of calling JsonConvert.SerializeObject() to convert the object into a string is causing problematic memory spikes for large objects.

我想做等效于此处反序列化的描述

推荐答案

您可以尝试使用

You could try using a PushStreamContent and write to it with a JsonTextWriter:

HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
response.Content = new PushStreamContent((stream, content, context) =>
{
    using (StreamWriter sw = new StreamWriter(stream, Encoding.UTF8))
    using (JsonTextWriter jtw = new JsonTextWriter(sw))
    {
        JsonSerializer ser = new JsonSerializer();
        ser.Serialize(jtw, hugeObject);
    }
}, "application/json");

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