C＃OutOfMemory例外閱讀投遞響應

我目前工作的一個簡單的應用程序，利用JSON對象發佈到API，並得到響應數據時。然而，當我運行POST方法，該POST的響應是如此之大，我遇到OutOfMemory例外。C＃OutOfMemory例外閱讀投遞響應

我目前使用的WebClient和過程中的CookieContainer：

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); 

}

我特地到這個問題，並已設置屬性AllowStreamBuffering是假的。

client.AllowStreamBuffering() = false;

但是，我仍然遇到問題，並不知道如何控制POST響應。

更新：2017年7月5日

感謝@Tim的建議，我已經搬到了響應流，但我現在遇到有關的實際響應的問題。用POST方法寫JSON（作爲一個字符串）到終點後，腳本被卡住在嘗試讀取響應。

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());

我想知道如果JSON不是可能編碼。

（邊注：我已經看過書面響應，一行行到一個文件，但它是導致問題的答覆 - http://cc.davelozinski.com/c-sharp/fastest-way-to-read-text-files）

來源

2017-06-18 John Gail

這裏的答案似乎與您的問題有關：https://stackoverflow.com/questions/15163451/system-outofmemoryexception-was-thrown-webclient-downloadstringasynch – Tim

嗨蒂姆，感謝您的信息。我還沒有嘗試使用HttpWebRequest來獲取getResponse（），但如果它是解決方案，我會在這裏更新它。 –

你可能需要使用一個流，BeginGetResponse應該讓你抓住整個響應塊 – Tim

我能解決我自己問題。對於標題，我忘了編碼JSON，併爲API正確設置內容類型。

這裏恰好是上述用於流相同的代碼，但與更新的報頭和bufferedStream用於處理數據和存儲增加的效率。

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); 
     } 

}

很多來到這裏的戴夫LOZINSKI的博客文章的方法對於內存處理，流閱讀，寫碼流（雖然他使用文件，而不是流）。通過上面的帖子尋求幫助是非常有用的。

來源

2017-07-07 01:33:39

C＃OutOfMemory例外閱讀投遞響應

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