流响应时可能出现无限循环
本文关键字:无限循环 响应 | 更新日期: 2023-09-27 18:11:44
我们正在努力确定我们所拥有的服务的高CPU使用率,我们认为有一些潜在的领域可能会导致无限循环。下面是我们认为可能会导致无限循环的代码。有没有什么特别的东西会导致while循环无限期地运行?
WebRequest request = WebRequest.Create(Url);
request.ContentLength = formDataLength;
request.ContentType = "application/x-www-form-urlencoded";
request.Method = "POST";
using (Stream rs = request.GetRequestStream())
{
ASCIIEncoding encoding = new ASCIIEncoding();
var postData = encoding.GetBytes(formData);
rs.Write(postData, 0, postData.Length);
string str = string.Empty;
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
using (Stream sm = response.GetResponseStream())
{
int totalBytesRead = 0;
long responseBytesToRead = 1024;
byte[] buffer = new byte[responseBytesToRead];
int bytesRead;
do
{
bytesRead = sm.Read(buffer, totalBytesRead, (int)(responseBytesToRead - totalBytesRead));
totalBytesRead += bytesRead;
} while (totalBytesRead < bytesRead);
request.Abort();
str = Encoding.Default.GetString(buffer);
}
}
return str;
}
来自MSDN文档:
返回值
类型:系统。Int32总的读字节数缓冲。这可以小于所请求的字节数那么多字节当前不可用,如果结束则为零(0)流已到达。
0表示流结束。到达流终点的条件已经确定。你所依赖的条件可能是不可靠的,而且是不必要的。
试
while(bytesRead != 0)
最好使用StreamReader
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
...
reader.ReadToEnd();
// or
while (!reader.EndOfStream)
{
// do read.
}