This example uses equipment: RFID network WIFI wireless TCP/UDP/HTTP programmable secondary development card reader POE powered voice-Taobao (taobao.com)
<%@ WebHandler Language="C#" Class="HttpReader" %>
using System;
using System.Web;
using System.IO;
using Newtonsoft.Json;
public class HttpReader : IHttpHandler
{
public void ProcessRequest (HttpContext context) {
string info = "";
string jihao = "";
string cardtype = "";
string card = "";
string Data = "";
string dn = "";
string Status = "";
Int16 cardtype16 = 0;
int cardtypecode = 0;
int pushortake = 0;
string dispstr = "";
string ChineseVoice = "[v8]"; //[v8] indicates the voice volume of this broadcast, the value range is v1 to v16
context.Response.ContentType = "text/plain";
if (context.Request["info"] != null) { info = context.Request["info"].ToString(); } //Received data packet number, need to respond to the packet number
if (context.Request["jihao"] != null) { jihao = context.Request["jihao"].ToString(); } //Equipment number (can be edited by yourself)
if (context.Request["cardtype"] != null) { cardtype = context.Request["cardtype"].ToString(); } //Card type, card status
if (context.Request["card"] != null) { card = context.Request["card"].ToString(); } //The original hexadecimal card number received can be used as needed Convert to other card number yourself
if (context.Request["Data"] != null) { Data = context.Request["Data"].ToString(); } //Sector content
if (context.Request["dn"] != null) { dn = context.Request["dn"].ToString(); } //Equipment hardware serial number, which has been solidified at the factory and is unique in the world
if (context.Request["Status"] != null) { Status = context.Request["Status"].ToString(); } //Read card status, such as 12 means card password authentication failed
if (info != "" & amp; & amp; jihao != "" & amp; & amp; cardtype != "" & amp; & amp; card != ""){
cardtype16 = Convert.ToInt16(cardtype, 16);
pushortake = cardtype16 / 128; //pushortake=0 means reading the card, >0 means the card leaves the sensing area
cardtypecode = cardtype16 % 16; //cardtypecode=1 ID card, 2 HID card, 3 T5557 card, 4 EM4305 card, 5 IC card, 6 second generation ID card, 7 is 15693 card, IClass"
}
else{ //If no valid parameters are obtained, use JSON method to parse and obtain the submitted parameters.
StreamReader sr = new StreamReader(context.Request.GetBufferlessInputStream());
string response = sr.ReadToEnd();
RootObject rb = JsonConvert.DeserializeObject<RootObject>(response);
info = rb.info; //Received data packet number, need to respond to the packet number
jihao = rb.jihao; //Equipment number (can be edited by yourself)
cardtype = rb.cardtype; //card type, card status
card = rb.card; //The original hexadecimal card number received can be converted into other card numbers as needed.
Data = rb.data; //Sector content
dn = rb.dn; //Equipment hardware serial number, solidified at the factory, unique in the world
Status = rb.status; //Card reading status, such as 12 means card password authentication failed
if (info != "" & amp; & amp; jihao != "" & amp; & amp; cardtype != "" & amp; & amp; card != "")
{
cardtype16 = Convert.ToInt16(cardtype, 16);
pushortake = cardtype16 / 128; //pushortake=0 means reading the card, >0 means the card leaves the sensing area
cardtypecode = cardtype16 % 16; // cardtypecode=1 ID card, 2 HID card, 3 T5557 card, 4 EM4305 card, 5 IC card, 6 second-generation ID card, 7 is 15693 card, IClass"
}
}
if (info != "" & amp; & amp; card != "") //The valid parameters are obtained through analysis, and the driver card reader responds by displaying text, beeping sound or broadcasting voice
{
dispstr = "{" + getChinesecode("card number") + ":}" + (card + " ").Substring(0, 12) + DateTime.Now.ToString("yy- MM-dd HH:mm:ss"); //Display information. Note that Chinese characters must be converted into codes that the device can display. Other alphanumeric symbols do not need to be converted. Information within {} is displayed in reverse video.
if (pushortake > 0)
{
ChineseVoice = ChineseVoice + getChinesecode("card number") + "[n1]" + card + getChinesecode("Leave the sensing area!"); //TTS voice, please note that Chinese characters must be converted into something that the device can recognize encoding, [n1] represents the digital broadcasting method, other alphanumeric symbols do not need to be converted
}
else
{
ChineseVoice = ChineseVoice + getChinesecode("Read card number") + "[n1]" + card;
}
string RepStr = "Response=1"; //Response=1 fixed prefix, our device uses this to retrieve return information, indicating the drive device display and sound
RepStr = RepStr + "," + info; //The submitted information serial number must correspond
RepStr = RepStr + "," + dispstr; //Display text on the card reader
RepStr = RepStr + ",20"; //Display duration 20 seconds
RepStr = RepStr + ",2"; //Buzzer sound type, value range 0-12
RepStr = RepStr + "," + ChineseVoice; //TTS voice broadcast
context.Response.Write(RepStr);
}
}
public class RootObject //json class
{
public string info { get; set; }
public string jihao { get; set; }
public string cardtype { get; set; }
public string card { get; set; }
public string data { get; set; }
public string dn { get; set; }
public string status { get; set; }
}
public static string getChinesecode(string inputstr) //Get Chinese code, display Chinese characters and TTS Chinese voice must be converted to code
{
int strlen = inputstr.Length;
string hexcode = "";
for (int i = 0; i < strlen; i + + )
{
string str = inputstr.Substring(i, 1);
byte[] Chinesecodearry = System.Text.Encoding.GetEncoding(936).GetBytes(str);
int codelen = (byte)Chinesecodearry.Length;
if (codelen == 1)
{
hexcode = hexcode + str;
}
else
{
hexcode = hexcode + "\x" + Chinesecodearry[0].ToString("X2") + Chinesecodearry[1].ToString("X2");
}
}
return hexcode;
}
public bool IsReusable {
get {
return false;
}
}
}