我正在尝试使用 HttpWebRequest 将附件发布到 CouchDB。但是,当我尝试“response = (HttpWebResponse)httpWebRequest.GetResponse();”时我收到一个 WebException 消息“底层连接已关闭:服务器关闭了预期保持事件状态的连接。”
我发现一些文章指出将 keepalive 设置为 false 并将 httpversion 设置为 1.0 可以解决这种情况。我发现它不会产生完全相同的错误,而且我不想采用这种方法,因为由于它处理连接的方式,我不想使用 1.0 版本。
欢迎提出任何建议或想法。我会尝试所有方法,直到一个有效!
public ServerResponse PostAttachment(Server server, Database db, Attachment attachment)
{
Stream dataStream;
HttpWebResponse response = null;
StreamReader sr = null;
byte[] buffer;
string json;
string boundary = "----------------------------" + DateTime.Now.Ticks.ToString("x");
string headerTemplate = "Content-Disposition: form-data; name=\"_attachments\"; filename=\"" + attachment.Filename + "\"\r\n Content-Type: application/octet-stream\r\n\r\n";
byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(headerTemplate);
byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create("http://" + server.Host + ":" +
server.Port.ToString() + "/" + db.Name + "/" + attachment.Document.Id);
httpWebRequest.ContentType = "multipart/form-data; boundary=" + boundary;
httpWebRequest.Method = "POST";
httpWebRequest.KeepAlive = true;
httpWebRequest.ContentLength = attachment.Stream.Length + headerbytes.Length + boundarybytes.Length;
if (!string.IsNullOrEmpty(server.EncodedCredentials))
httpWebRequest.Headers.Add("Authorization", server.EncodedCredentials);
if (!attachment.Stream.CanRead)
throw new System.NotSupportedException("The stream cannot be read.");
// Get the request stream
try
{
dataStream = httpWebRequest.GetRequestStream();
}
catch (Exception e)
{
throw new WebException("Failed to get the request stream.", e);
}
buffer = new byte[server.BufferSize];
int bytesRead;
dataStream.Write(headerbytes,0,headerbytes.Length);
attachment.Stream.Position = 0;
while ((bytesRead = attachment.Stream.Read(buffer, 0, buffer.Length)) > 0)
{
dataStream.Write(buffer, 0, bytesRead);
}
dataStream.Write(boundarybytes, 0, boundarybytes.Length);
dataStream.Close();
// send the request and get the response
try
{
response = (HttpWebResponse)httpWebRequest.GetResponse();
}
catch (Exception e)
{
throw new WebException("Invalid response received from server.", e);
}
// get the server's response json
try
{
dataStream = response.GetResponseStream();
sr = new StreamReader(dataStream);
json = sr.ReadToEnd();
}
catch (Exception e)
{
throw new WebException("Failed to access the response stream.", e);
}
// close up all our streams and response
sr.Close();
dataStream.Close();
response.Close();
// Deserialize the server response
return ConvertTo.JsonToServerResponse(json);
}
最佳答案
在对该主题进行了大量研究之后,我决定使用 PUT。虽然 Futon 使用 POST 方法,但它没有记录。对于以后阅读本文的任何人,请使用 PUT 方法,这将使您的生活更加轻松。
关于c# - 使用 HttpWebRequest.GetResponse 时出现 KeepAliveException,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/2560273/