fork of WebSocketClient with some fixes
Fork of WebSocketClient by
Websocket.cpp
- Committer:
- samux
- Date:
- 2012-08-13
- Revision:
- 1:de85cd4ec77b
- Parent:
- 0:10b6eaafc2da
- Child:
- 2:b390f29fb5fa
File content as of revision 1:de85cd4ec77b:
#include "Websocket.h" #include <string> #define MAX_TRY_WRITE 5 #define MAX_TRY_READ 3 //#define DEBUG Websocket::Websocket(char * url) { fillFields(url); socket.set_blocking(false, 2000); } void Websocket::fillFields(char * url) { char *res = NULL; char *res1 = NULL; char buf[50]; strcpy(buf, url); res = strtok(buf, ":"); if (strcmp(res, "ws")) { #ifdef DEBUG printf("\r\nFormat printfor: please use: \"ws://ip-or-domain[:port]/path\"\r\n\r\n"); #endif } else { //ip_domain and port res = strtok(NULL, "/"); //path res1 = strtok(NULL, " "); if (res1 != NULL) { path = res1; } //ip_domain res = strtok(res, ":"); //port res1 = strtok(NULL, " "); if (res1 != NULL) { port = res1; } else { port = "80"; } if (res != NULL) { ip_domain = res; } } } bool Websocket::connect() { char cmd[200]; while (socket.connect(ip_domain.c_str(), atoi(port.c_str())) < 0) { printf("Unable to connect to (%s) on port (%d)\r\n", ip_domain.c_str(), atoi(port.c_str())); wait(0.2); } // sent http header to upgrade to the ws protocol sprintf(cmd, "GET /%s HTTP/1.1\r\n", path.c_str()); write(cmd, strlen(cmd)); sprintf(cmd, "Host: %s:%s\r\n", ip_domain.c_str(), port.c_str()); write(cmd, strlen(cmd)); sprintf(cmd, "Upgrade: WebSocket\r\n"); write(cmd, strlen(cmd)); sprintf(cmd, "Connection: Upgrade\r\n"); write(cmd, strlen(cmd)); sprintf(cmd, "Sec-WebSocket-Key: L159VM0TWUzyDxwJEIEzjw==\r\n"); write(cmd, strlen(cmd)); sprintf(cmd, "Sec-WebSocket-Version: 13\r\n\r\n"); int ret = write(cmd, strlen(cmd)); if(ret != strlen(cmd)) { close(); printf("Could not send request"); return false; } while(socket.receive(cmd, 1) != 1); ret = read(cmd, 200); if(ret < 0) { close(); printf("Could not receive answer\r\n"); return false; } cmd[ret] = '\0'; #ifdef DEBUG printf("recv: %s\r\n", cmd); #endif if( strstr(cmd, "DdLWT/1JcX+nQFHebYP+rqEx5xI=") == NULL ) { printf("Wrong answer from server, got \"%s\" instead\r\n", cmd); do{ ret = read(cmd, 200); if(ret < 0) { printf("Could not receive answer\r\n"); return false; } cmd[ret] = '\0'; printf("%s",cmd); } while(ret > 0); close(); return false; } printf("\r\nip_domain: %s\r\npath: /%s\r\nport: %s\r\n\r\n", ip_domain.c_str(), path.c_str(), port.c_str()); return true; } int Websocket::sendLength(uint32_t len) { if (len < 126) { sendChar(len | (1<<7)); return 1; } else if (len < 65535) { sendChar(126 | (1<<7)); sendChar((len >> 8) & 0xff); sendChar(len & 0xff); return 3; } else { sendChar(127 | (1<<7)); for (int i = 0; i < 8; i++) { sendChar((len >> i*8) & 0xff); } return 9; } } int Websocket::sendChar(char c) { return write(&c, 1); } int Websocket::readChar(char * pC, bool block) { return read(pC, 1, block); } int Websocket::sendOpcode(uint8_t opcode) { return sendChar(0x80 | (opcode & 0x0f)); } int Websocket::sendMask() { for (int i = 0; i < 4; i++) { sendChar(0); } return 4; } int Websocket::send(char * str) { sendOpcode(0x01); sendLength(strlen(str)); sendMask(); int res = write(str, strlen(str)); return res; } bool Websocket::read(char * message) { int i = 0; uint32_t len_msg; char opcode = 0; char c; char mask[4] = {0, 0, 0, 0}; bool is_masked = false; Timer tmr; // read the opcode tmr.start(); while (true) { if (tmr.read() > 3) { printf("timeout ws\r\n"); return false; } if (socket.receive(&opcode, 1) != 1) { return false; } if (opcode == 0x81) break; } #ifdef DEBUG printf("opcode: 0x%X\r\n", opcode); #endif readChar(&c); len_msg = c & 0x7f; is_masked = c & 0x80; if (len_msg == 126) { readChar(&c); len_msg = c << 8; readChar(&c); len_msg += c; } else if (len_msg == 127) { len_msg = 0; for (int i = 0; i < 8; i++) { readChar(&c); len_msg += (c << (7-i)*8); } } if(len_msg == 0) { return false; } #ifdef DEBUG printf("length: %d\r\n", len_msg); #endif if (is_masked) { for (i = 0; i < 4; i++) readChar(&c); mask[i] = c; } int nb = read(message, len_msg, false); if (nb != len_msg) return false; for (i = 0; i < len_msg; i++) { message[i] = message[i] ^ mask[i % 4]; } message[len_msg] = '\0'; return true; } bool Websocket::close() { if(!is_connected()) return false; int ret = socket.close(); if (ret < 0) { printf("Could not disconnect"); return false; } return true; } bool Websocket::is_connected() { return socket.is_connected(); } std::string Websocket::getPath() { return path; } int Websocket::write(char * str, int len, uint32_t timeout) { int res = 0, idx = 0; for (int j = 0; j < MAX_TRY_WRITE; j++) { if (idx == len) return len; for(int i = 0; i < MAX_TRY_WRITE; i++) { if ((res = socket.send_all(str + idx, len - idx)) != -1) break; if (i == MAX_TRY_WRITE - 1) return -1; } idx += res; } return idx; } int Websocket::read(char * str, int len, bool block) { int res = 0, idx = 0; for (int j = 0; j < MAX_TRY_READ; j++) { if (idx == len) return len; for(int i = 0; i < MAX_TRY_READ; i++) { if (block) { if ((res = socket.receive_all(str + idx, len - idx)) != -1) break; } else { if ((res = socket.receive(str + idx, len - idx)) != -1) break; } if (i == MAX_TRY_READ - 1 || !block) return (idx == 0) ? -1 : idx; } idx += res; } return idx; }