小编Lea*_*ode的帖子

到目前为止我在网络api上使用Microsoft WebSockets的所有示例都使用IIS,实现是在get方法上将HTTP连接升级为websocket,并将websocket处理程序的实例传递给HTTPContext

public HttpResponseMessage Get() {
  if (HttpContext.Current.IsWebSocketRequest) {
     var noteHandler = new NoteSocketHandler();
     HttpContext.Current.AcceptWebSocketRequest(noteHandler);
  }
  return new HttpResponseMessage(HttpStatusCode.SwitchingProtocols);
}

我想要实现的是在OWIN管道上做同样的事情.我面临的问题是连接正在升级以使用Websockets,但它没有使用我的websocket处理程序.我哪里错了？请建议.

使用OwinContext的控制器(遵循Nancy使用OWIN的示例WebSockets),

public HttpResponseMessage Get() {
   IOwinContext owinContext = Request.GetOwinContext();

   WebSocketAccept acceptToken = owinContext.Get<WebSocketAccept>("websocket.Accept");
   if (acceptToken != null) {
      var requestHeaders = GetValue<IDictionary<string, string[]>>(owinContext.Environment, "owin.RequestHeaders");

      Dictionary<string, object> acceptOptions = null;
      string[] subProtocols;
      if (requestHeaders.TryGetValue("Sec-WebSocket-Protocol", out subProtocols) && subProtocols.Length > 0) {
         acceptOptions = new Dictionary<string, object>();
         // Select the first one from the client
         acceptOptions.Add("websocket.SubProtocol", subProtocols[0].Split(',').First().Trim()); …

import os
import sys

files = os.listdir(sys.argv[1])
for file in files:
    if file[-4:] == ".png":
        os.rename(file, file.replace('\r', ''))

我使用上面的代码从文件名中删除\ r \n,但有些如何执行时我得到以下错误

Traceback (most recent call last):
  File "renameImages.py", line 9, in <module>
    os.rename(f, f.replace('\r', ''))
OSError: [Errno 2] No such file or directory

我哪里错了？

我通过调用构造函数中的函数运行下面的代码

第一 -

>>> class PrintName:
...    def __init__(self, value):
...      self._value = value
...      printName(self._value)
...    def printName(self, value):
...      for c in value:
...        print c
...
>>> o = PrintName('Chaitanya')
C
h
a
i
t
a
n
y
a

我再次运行这个,我得到了这个

>>> class PrintName:
...    def __init__(self, value):
...      self._value = value
...      printName(self._value)
...    def printName(self, value):
...      for c in value:
...        print c
...
>>> o = PrintName('Hello')
Traceback (most recent call last):
  File "<stdin>", …