// QR Utility
internal static byte[] getQRData()
{
// Fetch data from QR code...
string address;
try { address = Clipboard.GetText(); }
catch { Util.Alert("No text (url) in clipboard."); return(null); }
try { if (address.Length < 4 || address.Substring(0, 3) != "htt")
{
Util.Alert("Clipboard text is not a valid URL:", address); return(null);
}
}
catch { Util.Alert("Clipboard text is not a valid URL:", address); return(null); }
string webURL = "http://api.qrserver.com/v1/read-qr-code/?fileurl=" + HttpUtility.UrlEncode(address);
try
{
string data = Util.getStringFromURL(webURL);
if (data.Contains("could not find"))
{
Util.Alert("Reader could not find QR data in the image."); return(null);
}
if (data.Contains("filetype not supported"))
{
Util.Alert("Input URL is not valid. Double check that it is an image (jpg/png).", address); return(null);
}
// Quickly convert the json response to a data string
const string cap = "\",\"error\":null}]}]";
const string intro = "[{\"type\":\"qrcode\",\"symbol\":[{\"seq\":0,\"data\":\"";
if (!data.StartsWith(intro))
{
throw new Exception();
}
string pkstr = data.Substring(intro.Length);
if (pkstr.Contains("nQR-Code:")) // Remove multiple QR codes in same image
{
pkstr = pkstr.Substring(0, pkstr.IndexOf("nQR-Code:", StringComparison.Ordinal));
}
pkstr = pkstr.Substring(0, pkstr.IndexOf(cap, StringComparison.Ordinal)); // Trim outro
try
{
if (!pkstr.StartsWith("http")) // G7
{
string fstr = Regex.Unescape(pkstr);
byte[] raw = Encoding.Unicode.GetBytes(fstr);
// Remove 00 interstitials and retrieve from offset 0x30, take PK7 Stored Size (always)
return(raw.ToList().Where((c, i) => i % 2 == 0).Skip(0x30).Take(0xE8).ToArray());
}
// All except G7
pkstr = pkstr.Substring(pkstr.IndexOf("#", StringComparison.Ordinal) + 1); // Trim URL
pkstr = pkstr.Replace("\\", ""); // Rectify response
return(Convert.FromBase64String(pkstr));
}
catch { Util.Alert("QR string to Data failed."); return(null); }
}
catch { Util.Alert("Unable to connect to the internet to decode QR code."); return(null); }
}
// QR Utility
internal static byte[] getQRData()
{
// Fetch data from QR code...
string address;
try { address = Clipboard.GetText(); }
catch { Util.Alert("No text (url) in clipboard."); return(null); }
try { if (address.Length < 4 || address.Substring(0, 3) != "htt")
{
Util.Alert("Clipboard text is not a valid URL:", address); return(null);
}
}
catch { Util.Alert("Clipboard text is not a valid URL:", address); return(null); }
string webURL = "http://api.qrserver.com/v1/read-qr-code/?fileurl=" + HttpUtility.UrlEncode(address);
try
{
string data = Util.getStringFromURL(webURL);
if (data.Contains("could not find"))
{
Util.Alert("Reader could not find QR data in the image."); return(null);
}
if (data.Contains("filetype not supported"))
{
Util.Alert("Input URL is not valid. Double check that it is an image (jpg/png).", address); return(null);
}
// Quickly convert the json response to a data string
string pkstr = data.Substring(data.IndexOf("#", StringComparison.Ordinal) + 1); // Trim intro
pkstr = pkstr.Substring(0, pkstr.IndexOf("\",\"error\":null}]}]", StringComparison.Ordinal)); // Trim outro
if (pkstr.Contains("nQR-Code:"))
{
pkstr = pkstr.Substring(0, pkstr.IndexOf("nQR-Code:", StringComparison.Ordinal)); // Remove multiple QR codes in same image
}
pkstr = pkstr.Replace("\\", ""); // Rectify response
try { return(Convert.FromBase64String(pkstr)); }
catch { Util.Alert("QR string to Data failed.", pkstr); return(null); }
}
catch { Util.Alert("Unable to connect to the internet to decode QR code."); return(null); }
}
