C#读取Post响应时发生OutOfMemory异常

我目前正在开发一个简单的应用程序，它利用JSON对象发布到API并获取响应数据。但是，当我运行POST方法时，POST响应非常大，以至于我遇到OutOfMemory异常

我目前正在使用WebClient和CookieContainer来完成以下过程：

string jsonObject ="...."; //Example JSON string - It's very small

using (var client = new WebClient())
{
     var auth = new NameValueCollection();
       values["username"] = "username";
       values["password"] = "password";

     client.uploadValues(endpoint,auth);

     // This is causing the OutOfMemory Exception
     var response = client.uploadString(endpoint, jsonObject);

}

我已经研究了这个问题，并将属性AllowStreamBuffering设置为false

 client.AllowStreamBuffering() = false;

但是，我仍然遇到这个问题，不知道如何控制帖子的回复

    String endPoint = @"http://example.com/v1/api/";
    String json = @"....";

    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(endPoint);
    request.Method = "POST";
    request.KeepAlive = false;
    request.AllowReadStreamBuffering = false;

    /* Pretend this middle part does the Authorization with username and password. */
    /* I have actually authenticated using the above method, and passed a key to the request */

    //This part POST the JSON to the API
    using (StreamWriter writeStream = new StreamWriter(request.GetRequestStream()))
        {
            writeStream.Write(json);
            writeStream.Flush();
            writeStream.Close();  
        }

    //This bottom part opens up a console, but never reads or loads the data
    HttpWebResponse response = (HttpWebResponse)request.GetResponse();
    StreamReader reader = new StreamReader(response.GetResponseStream());

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更新：2017年7月5日

多亏了@Tim的建议，我得到了一系列的回复，但我遇到了关于实际回复的问题。在使用POST方法将JSON（作为字符串）写入端点后，脚本无法读取响应

    String endPoint = @"http://example.com/v1/api/";
    String json = @"....";

    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(endPoint);
    request.Method = "POST";
    request.KeepAlive = false;
    request.AllowReadStreamBuffering = false;

    /* Pretend this middle part does the Authorization with username and password. */
    /* I have actually authenticated using the above method, and passed a key to the request */

    //This part POST the JSON to the API
    using (StreamWriter writeStream = new StreamWriter(request.GetRequestStream()))
        {
            writeStream.Write(json);
            writeStream.Flush();
            writeStream.Close();  
        }

    //This bottom part opens up a console, but never reads or loads the data
    HttpWebResponse response = (HttpWebResponse)request.GetResponse();
    StreamReader reader = new StreamReader(response.GetResponseStream());

我想知道JSON是否可能没有编码

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（旁注：我已经考虑过将响应逐行写入文件，但正是响应导致了问题--）

我能够解决自己的问题。对于头部，我忘记了对JSON进行编码，并为API正确设置了内容类型

这里的代码与上面的流代码完全相同，但具有更新的标头和bufferedStream，以提高处理数据和内存的效率

String endPoint = @"http://example.com/v1/api/";
String json = @"....";//Example JSON string

Byte[] jsonData = Encoding.UTF8.GetBytes(json);

StreamWriter file = new StreamWriter(@"File Location");

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(endPoint);
request.Method = "POST";
request.ContentType = "text/plain";
request.KeepAlive = false;
request.AllowReadStreamBuffering = false;
request.ContentLength = jsonData.Length;

/* Pretend this middle part does the Authorization with username and password. */
/* I have actually authenticated using the above method, and passed a key to the request */

 //This part POST the JSON to the API
 Stream writeStream = request.GetRequestStream();
 writeStream.Write(jsonData, 0, jsonData.Length);

 //This conducts the reading/writing into the file
 HttpWebResponse response = (HttpWebResponse)request.GetResponse();
 using (Stream receivedStream = response.GetResponseStream())
 using (BufferedStream bs = new BufferedStream(receivedStream))
 using (StreamReader sr = new StreamReader(bs))
 {
       String s;
       while ((s = sr.ReadLine()) != null)
       {
            file.WriteLine(s);
        }

 }

---

这里有很多方法来自Dave Lozinski关于内存处理、流读取和流写入的博客文章（尽管他使用文件而不是流）。浏览上面的帖子寻求帮助非常有用。

我能够解决自己的问题。对于头部，我忘记了对JSON进行编码，并为API正确设置了内容类型

这里的代码与上面的流代码完全相同，但具有更新的标头和bufferedStream，以提高处理数据和内存的效率

String endPoint = @"http://example.com/v1/api/";
String json = @"....";//Example JSON string

Byte[] jsonData = Encoding.UTF8.GetBytes(json);

StreamWriter file = new StreamWriter(@"File Location");

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(endPoint);
request.Method = "POST";
request.ContentType = "text/plain";
request.KeepAlive = false;
request.AllowReadStreamBuffering = false;
request.ContentLength = jsonData.Length;

/* Pretend this middle part does the Authorization with username and password. */
/* I have actually authenticated using the above method, and passed a key to the request */

 //This part POST the JSON to the API
 Stream writeStream = request.GetRequestStream();
 writeStream.Write(jsonData, 0, jsonData.Length);

 //This conducts the reading/writing into the file
 HttpWebResponse response = (HttpWebResponse)request.GetResponse();
 using (Stream receivedStream = response.GetResponseStream())
 using (BufferedStream bs = new BufferedStream(receivedStream))
 using (StreamReader sr = new StreamReader(bs))
 {
       String s;
       while ((s = sr.ReadLine()) != null)
       {
            file.WriteLine(s);
        }

 }

---

这里有很多方法来自Dave Lozinski关于内存处理、流读取和流写入的博客文章（尽管他使用文件而不是流）。浏览上面的帖子寻求帮助非常有用。

这里的答案似乎与您的问题有关：嗨，蒂姆，谢谢您提供的信息。我还没有尝试使用HttpWebRequest for getResponse（），但如果是解决方案，我会在这里更新它。您可能需要使用流，BeginGetResponse应该允许您将整个响应分块获取。这里的答案似乎与您的问题有关：Hi Tim，感谢您提供的信息。我还没有尝试使用HttpWebRequest for getResponse（），但如果是解决方案，我会在这里更新它。您可能需要使用流，BeginGetResponse应该允许您以块的形式获取整个响应