public static bool TryParseQueryString(string str, out PrintTask result, bool obfused = false)
{
try
{
var data = new Dictionary <string, string>();
var seperator = new char[] { '=' };
foreach (var field in str.Split('&'))
{
var kv = field.Split(seperator, 2);
data[HttpUtility.UrlDecode(kv[0])] = kv.Length > 1 ? HttpUtility.UrlDecode(kv[1]) : "";
}
result = new PrintTask();
if (obfused)
{
if (data.TryGetValue("authinfo", out var authinfo))
{
var bytes = Convert.FromBase64String(authinfo);
for (int i = 0; i < bytes.Length; i += 2)
{
bytes[i + 1] ^= (byte)(0xff & ~bytes[i]);
bytes[i] ^= bytes[i + 1];
}
var start = bytes[0] == 0 ? 1 : 0;
authinfo = Encoding.UTF8.GetString(bytes, start, bytes.Length - start);
var splitted = authinfo.Split(new[] { '|' }, 2);
if (splitted.Length == 2)
{
result.Username = splitted[0];
result.UserNickname = splitted[1];
}
}
}
else
{
if (data.TryGetValue("username", out var username))
{
result.Username = username;
}
if (data.TryGetValue("nickname", out var nickname))
{
result.UserNickname = nickname;
}
}
if (data.TryGetValue("content", out var content))
{
result.Content = content;
}
return(true);
}
catch (Exception)
{
result = null;
return(false);
}
}
public static bool TryParseJson(string str, out PrintTask result)
{
try
{
result = JsonConvert.DeserializeObject <PrintTask>(str);
return(result != null);
}
catch (Exception)
{
result = null;
return(false);
}
}
private void testPrintButton_Click(object sender, RoutedEventArgs e)
{
if (!_isPrinterConfigured)
{
MessageBox.Show("Please setup printing configurations first", "Cannot Start",
MessageBoxButton.OK, MessageBoxImage.Warning);
return;
}
var testTask = new PrintTask();
testTask.Username = "******";
testTask.UserNickname = "Test Nickname";
testTask.Content = Enumerable.Range(0, 20).Select(x => "This is a very long line ").Aggregate((a, b) => a + b) + "\n";
testTask.Content += "Here are punctuations\n\"" + @"'[]{}!@#$%^&*()_-+=,./<>?;':\|`~" + "\n";
testTask.Content += Enumerable.Range(0, 20).Select(
x => Enumerable.Range(0, 30).Select(y => "Go to next page ").Aggregate((a, b) => a + b) + "\n"
).Aggregate((a, b) => a + b);
PrintHandler(testTask);
}
//private void LoadPrintFormPage()
//{
// string filePath = System.Reflection.Assembly.GetExecutingAssembly().Location;
// filePath = Path.Combine(Path.GetDirectoryName(filePath), "print.html");
// string content = File.OpenText(filePath).ReadToEnd();
// _printFormRawPage = Encoding.UTF8.GetBytes(content);
//}
private void HandleRequest(HttpListenerContext context)
{
var request = context.Request;
var response = context.Response;
if (request.HttpMethod == "POST")
{
try
{
//var buffer = new byte[request.ContentLength64 + 10];
//int len;
//len = request.InputStream.Read(buffer, 0, (int)request.ContentLength64);
//var str = Encoding.UTF8.GetString(buffer, 0, len);
var str = new StreamReader(request.InputStream).ReadToEnd();
if (PrintTask.TryParseQueryString(str, out PrintTask printTask, true))
{
_printQueue.Add(printTask);
response.Redirect(RedirectPath);
}
else
{
response.StatusCode = 400;
}
}