Samuel Mokrani / WebSocketClient

Simple websocket client

Dependents:   Websocket_Ethernet_HelloWorld Websocket_Wifly_HelloWorld RPC_Wifly_HelloWorld RPC_Ethernet_HelloWorld ... more

Websocket.h@3:9589afa4712e, 2012-08-15 (annotated)

Committer:
samux
Date:
Wed Aug 15 16:24:20 2012 +0000
Revision:
3:9589afa4712e
Parent:
0:10b6eaafc2da
Child:
4:466f90b7849a
add DBG macro

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 0:10b6eaafc2da 1 /**
samux 0:10b6eaafc2da 2 * @author Samuel Mokrani
samux 0:10b6eaafc2da 3 *
samux 0:10b6eaafc2da 4 * @section LICENSE
samux 0:10b6eaafc2da 5 *
samux 0:10b6eaafc2da 6 * Copyright (c) 2011 mbed
samux 0:10b6eaafc2da 7 *
samux 0:10b6eaafc2da 8 * Permission is hereby granted, free of charge, to any person obtaining a copy
samux 0:10b6eaafc2da 9 * of this software and associated documentation files (the "Software"), to deal
samux 0:10b6eaafc2da 10 * in the Software without restriction, including without limitation the rights
samux 0:10b6eaafc2da 11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
samux 0:10b6eaafc2da 12 * copies of the Software, and to permit persons to whom the Software is
samux 0:10b6eaafc2da 13 * furnished to do so, subject to the following conditions:
samux 0:10b6eaafc2da 14 *
samux 0:10b6eaafc2da 15 * The above copyright notice and this permission notice shall be included in
samux 0:10b6eaafc2da 16 * all copies or substantial portions of the Software.
samux 0:10b6eaafc2da 17 *
samux 0:10b6eaafc2da 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
samux 0:10b6eaafc2da 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
samux 0:10b6eaafc2da 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
samux 0:10b6eaafc2da 21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
samux 0:10b6eaafc2da 22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 0:10b6eaafc2da 23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
samux 0:10b6eaafc2da 24 * THE SOFTWARE.
samux 0:10b6eaafc2da 25 *
samux 0:10b6eaafc2da 26 * @section DESCRIPTION
samux 0:10b6eaafc2da 27 * Simple websocket client
samux 0:10b6eaafc2da 28 *
samux 0:10b6eaafc2da 29 */
samux 0:10b6eaafc2da 30
samux 0:10b6eaafc2da 31 #ifndef WEBSOCKET_H
samux 0:10b6eaafc2da 32 #define WEBSOCKET_H
samux 0:10b6eaafc2da 33
samux 0:10b6eaafc2da 34 #include "mbed.h"
samux 0:10b6eaafc2da 35 #include <string>
samux 0:10b6eaafc2da 36
samux 0:10b6eaafc2da 37 #include "TCPSocketConnection.h"
samux 0:10b6eaafc2da 38
samux 0:10b6eaafc2da 39 /** Websocket client Class.
samux 0:10b6eaafc2da 40 *
samux 0:10b6eaafc2da 41 * Example (ethernet network):
samux 0:10b6eaafc2da 42 * @code
samux 0:10b6eaafc2da 43 * #include "mbed.h"
samux 0:10b6eaafc2da 44 * #include "EthernetInterface.h"
samux 0:10b6eaafc2da 45 * #include "Websocket.h"
samux 0:10b6eaafc2da 46 *
samux 0:10b6eaafc2da 47 * int main() {
samux 0:10b6eaafc2da 48 * EthernetInterface eth;
samux 0:10b6eaafc2da 49 * eth.init(); //Use DHCP
samux 0:10b6eaafc2da 50 * eth.connect();
samux 0:10b6eaafc2da 51 * printf("IP Address is %s\n\r", eth.getIPAddress());
samux 0:10b6eaafc2da 52 *
samux 0:10b6eaafc2da 53 * Websocket ws("ws://sockets.mbed.org:443/ws/demo/rw");
samux 0:10b6eaafc2da 54 * ws.connect();
samux 0:10b6eaafc2da 55 *
samux 0:10b6eaafc2da 56 * while (1) {
samux 0:10b6eaafc2da 57 * int res = ws.send("WebSocket Hello World!");
samux 0:10b6eaafc2da 58 *
samux 0:10b6eaafc2da 59 * if (ws.read(recv)) {
samux 0:10b6eaafc2da 60 * printf("rcv: %s\r\n", recv);
samux 0:10b6eaafc2da 61 * }
samux 0:10b6eaafc2da 62 *
samux 0:10b6eaafc2da 63 * wait(0.1);
samux 0:10b6eaafc2da 64 * }
samux 0:10b6eaafc2da 65 * }
samux 0:10b6eaafc2da 66 * @endcode
samux 0:10b6eaafc2da 67 */
samux 0:10b6eaafc2da 68
samux 0:10b6eaafc2da 69 class Websocket
samux 0:10b6eaafc2da 70 {
samux 0:10b6eaafc2da 71 public:
samux 0:10b6eaafc2da 72 /**
samux 0:10b6eaafc2da 73 * Constructor
samux 0:10b6eaafc2da 74 *
samux 0:10b6eaafc2da 75 * @param url The Websocket url in the form "ws://ip_domain[:port]/path" (by default: port = 80)
samux 0:10b6eaafc2da 76 */
samux 0:10b6eaafc2da 77 Websocket(char * url);
samux 0:10b6eaafc2da 78
samux 0:10b6eaafc2da 79 /**
samux 0:10b6eaafc2da 80 * Connect to the websocket url
samux 0:10b6eaafc2da 81 *
samux 0:10b6eaafc2da 82 *@return true if the connection is established, false otherwise
samux 0:10b6eaafc2da 83 */
samux 0:10b6eaafc2da 84 bool connect();
samux 0:10b6eaafc2da 85
samux 0:10b6eaafc2da 86 /**
samux 0:10b6eaafc2da 87 * Send a string according to the websocket format (see rfc 6455)
samux 0:10b6eaafc2da 88 *
samux 0:10b6eaafc2da 89 * @param str string to be sent
samux 0:10b6eaafc2da 90 *
samux 0:10b6eaafc2da 91 * @returns the number of bytes sent
samux 0:10b6eaafc2da 92 */
samux 0:10b6eaafc2da 93 int send(char * str);
samux 0:10b6eaafc2da 94
samux 0:10b6eaafc2da 95 /**
samux 0:10b6eaafc2da 96 * Read a websocket message
samux 0:10b6eaafc2da 97 *
samux 0:10b6eaafc2da 98 * @param message pointer to the string to be read (null if drop frame)
samux 0:10b6eaafc2da 99 *
samux 0:10b6eaafc2da 100 * @return true if a websocket frame has been read
samux 0:10b6eaafc2da 101 */
samux 0:10b6eaafc2da 102 bool read(char * message);
samux 0:10b6eaafc2da 103
samux 0:10b6eaafc2da 104 /**
samux 0:10b6eaafc2da 105 * To see if there is a websocket connection active
samux 0:10b6eaafc2da 106 *
samux 0:10b6eaafc2da 107 * @return true if there is a connection active
samux 0:10b6eaafc2da 108 */
samux 0:10b6eaafc2da 109 bool is_connected();
samux 0:10b6eaafc2da 110
samux 0:10b6eaafc2da 111 /**
samux 0:10b6eaafc2da 112 * Close the websocket connection
samux 0:10b6eaafc2da 113 *
samux 0:10b6eaafc2da 114 * @return true if the connection has been closed, false otherwise
samux 0:10b6eaafc2da 115 */
samux 0:10b6eaafc2da 116 bool close();
samux 0:10b6eaafc2da 117
samux 0:10b6eaafc2da 118 /*
samux 0:10b6eaafc2da 119 * Accessor: get path from the websocket url
samux 0:10b6eaafc2da 120 *
samux 0:10b6eaafc2da 121 * @return path
samux 0:10b6eaafc2da 122 */
samux 0:10b6eaafc2da 123 std::string getPath();
samux 0:10b6eaafc2da 124
samux 0:10b6eaafc2da 125 private:
samux 0:10b6eaafc2da 126
samux 0:10b6eaafc2da 127 void fillFields(char * url);
samux 0:10b6eaafc2da 128 int sendOpcode(uint8_t opcode);
samux 0:10b6eaafc2da 129 int sendLength(uint32_t len);
samux 0:10b6eaafc2da 130 int sendMask();
samux 0:10b6eaafc2da 131 int sendChar(char c);
samux 0:10b6eaafc2da 132 int readChar(char * pC, bool block = true);
samux 0:10b6eaafc2da 133
samux 0:10b6eaafc2da 134 std::string ip_domain;
samux 0:10b6eaafc2da 135 std::string path;
samux 0:10b6eaafc2da 136 std::string port;
samux 0:10b6eaafc2da 137
samux 0:10b6eaafc2da 138 TCPSocketConnection socket;
samux 0:10b6eaafc2da 139
samux 3:9589afa4712e 140 int read(char * buf, int len, int min_len = -1);
samux 3:9589afa4712e 141 int write(char * buf, int len);
samux 0:10b6eaafc2da 142 };
samux 0:10b6eaafc2da 143
samux 0:10b6eaafc2da 144 #endif