Write Redis client by yourself (C # implementation) 3,

Write Redis client by yourself (C # implementation) 3,
Implementation Code (C #) 1. Send the GET command

String keyGet = "SetKeyTest"; // The key StringBuilder sbSendGet = new StringBuilder (); sbSendGet. append ("* 2 \ r \ n"); // number of parameters 3 string character GET = "GET"; sbSendGet. append ("$" + Encoding. UTF8.GetBytes (batch get ). length + "\ r \ n"); // The Length of parameter 1 sbSendGet. append (writable GET + "\ r \ n"); // parameter 1 (GET command) sbSendGet. append ("$" + Encoding. UTF8.GetBytes (keyGet ). length + "\ r \ n"); // The Length of parameter 2 sbSendGet. append ("" + keyGet + "\ r \ n"); // parameter 2 (get key) Console. writeLine ("sent command:"); Console. write (sbSendGet. toString (); byte [] bytes ET = Encoding. UTF8.GetBytes (sbSendGet. toString (); // converts a request to a byte array s. send (dataGet); // Send command

2. Receive batch replies

Byte [] resultGET = new byte [512]; int resultGetLength = s. receive (resultGET); // receives a response // reassemble a result byte [] newResultGet = new byte [resultGetLength] based on the received data length; for (int I = 0; I <resultGetLength; I ++) {newResultGet [I] = resultGET [I];} string strGetResult = Encoding. UTF8.GetString (newResultGet); // convert the result to stringConsole. write ("obtained value:" + strGetResult );

3. Results:

/// <Summary> /// send command // </summary> /// <param name = "client"> </param> /// <param name = "datas"> </param> // <returns> </returns> public static string SendCmd (this Socket client, params byte [] [] datas) {client. send (Encoding. UTF8.GetBytes ("*" + datas. length + "\ r \ n"); for (int I = 0; I <datas. length; I ++) {client. send (Encoding. UTF8.GetBytes ("$" + datas [I]. length); client. send (Encoding. UTF8.GetBytes ("\ r \ n"); client. send (datas [I]); client. send (Encoding. UTF8.GetBytes ("\ r \ n");} return Reply (client );}2. receive replies

/// <Summary> /// receive the reply /// </summary> /// <param name = "client"> </param> /// <returns> </returns> public static string Reply (Socket client) {BufferedStream s = new BufferedStream (new NetworkStream (client); int B = s. readByte (); // read the first byte string result; switch (B) {// the first byte of status reply (status reply) is "+" case '+ ': result = ReadLine (s); return "+" + result; // the first byte of error reply is "-" case '-': result = Read Line (s); throw new Exception (result); // throw an Exception // the first byte of integer reply is ":" case ':': result = ReadLine (s); return ":" + result; // the first byte of bulk reply is "$" case '$ ': result = ReadLine (s); // read the number of data bytes first. writeLine ("$" + result); int count = int. parse (result); // if the requested value does not exist, the special value-1 is used as the reply length value for batch reply. if (count =-1) {return null;} result = ReadByLength (s, count); Console. writeLine (resul T); return result; // the first byte of multi bulk reply is "*" case '*': result = ReadLine (s ); // read the number of data rows first. writeLine ("*" + result); int rows = int. parse (result); StringBuilder sb = new StringBuilder (); for (int I = 0; I <rows; I ++) {result = ReadLine (s); sb. appendLine (result); result = ReadLine (s); sb. appendLine (result);} Console. writeLine (sb); return sb. toString (); default: break;} return" ";} /// <Summary> /// read by length /// </summary> /// <param name = "s"> </param> /// <param name = "l"> </param> // <returns> </returns> public static string ReadByLength (BufferedStream s, long l) {byte [] bytes = new byte [l]; var r = s. read (bytes, 0, (int) l); return Encoding. UTF8.GetString (bytes );} /// <summary> /// read by row /// </summary> /// <param name = "s"> </param> /// <returns> </returns> public static string ReadLine (Buffer EdStream s) {StringBuilder sb = new StringBuilder (); int B = 0; while (B = s. ReadByte ())! =-1) {if (B = '\ R') {if (B = s. ReadByte ())! =-1) {if (B = '\ n') {break;} else {sb. append ('\ R') ;}} else {break ;}} sb. append (char) B);} return sb. toString ();}

3. GET and SET commands

Public static bool Set (this Socket client, string key, string value) {return Set (client, key, Encoding. UTF8.GetBytes (value);} public static bool Set (this Socket client, string key, byte [] value) {string result = SendCmd (client, Encoding. UTF8.GetBytes ("SET"), Encoding. UTF8.GetBytes (key), value); Console. writeLine (result); return result = "+ OK"; // If + OK, the setting is successful! // String} public static string Get (this Socket client, string key) {return SendCmd (client, Encoding. UTF8.GetBytes ("GET"), Encoding. UTF8.GetBytes (key); // string}

4. Restructured code

 

# Region SETstring key = "SetKeyTest"; // set the keystring value = "Set value"; // set the value var result = s. set (key, value); Console. writeLine (result? "Set successfully! ":" Setting failed! "); // Determine whether the setting is successful # endregion # region sending command Getstring keyGet =" SetKeyTest "; // The key var resultGet = s. get (keyGet); // send command Console. write ("obtained value:" + resultGet); # endregion

Is it concise ???

5. Results