Diff: Websocket.cpp

Revision:

3:9589afa4712e

Parent:

2:b390f29fb5fa

Child:

4:466f90b7849a

diff -r b390f29fb5fa -r 9589afa4712e Websocket.cpp
--- a/Websocket.cpp	Mon Aug 13 09:37:35 2012 +0000
+++ b/Websocket.cpp	Wed Aug 15 16:24:20 2012 +0000
@@ -1,303 +1,293 @@
-#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;
-    }
-
-    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;
-        }
-        
-        socket.set_blocking(false, 1);
-        if (socket.receive(&opcode, 1) != 1) {
-            socket.set_blocking(false, 2000);
-            return false;
-        }
-        
-        socket.set_blocking(false, 2000);
-
-        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;
-}
+#include "Websocket.h"
+#include <string>
+
+#define MAX_TRY_WRITE 50
+#define MAX_TRY_READ 30
+
+//Debug is disabled by default
+#if 0
+#define DBG(x, ...) std::printf("[WebSocket : DBG]"x"\r\n", ##__VA_ARGS__); 
+#define WARN(x, ...) std::printf("[WebSocket : WARN]"x"\r\n", ##__VA_ARGS__); 
+#define ERR(x, ...) std::printf("[WebSocket : ERR]"x"\r\n", ##__VA_ARGS__); 
+#else
+#define DBG(x, ...) 
+#define WARN(x, ...)
+#define ERR(x, ...) 
+#endif
+
+#define INFO(x, ...) printf("[WebSocket : INFO]"x"\r\n", ##__VA_ARGS__); 
+
+Websocket::Websocket(char * url) {
+    fillFields(url);
+    socket.set_blocking(false, 400);
+}
+
+void Websocket::fillFields(char * url) {
+    char *res = NULL;
+    char *res1 = NULL;
+
+    char buf[50];
+    strcpy(buf, url);
+
+    res = strtok(buf, ":");
+    if (strcmp(res, "ws")) {
+        DBG("\r\nFormat printfor: please use: \"ws://ip-or-domain[:port]/path\"\r\n\r\n");
+    } 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) {
+        ERR("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();
+        ERR("Could not send request");
+        return false;
+    }
+
+    ret = read(cmd, 200, 100);
+    if (ret < 0) {
+        close();
+        ERR("Could not receive answer\r\n");
+        return false;
+    }
+
+    cmd[ret] = '\0';
+    DBG("recv: %s\r\n", cmd);
+
+    if ( strstr(cmd, "DdLWT/1JcX+nQFHebYP+rqEx5xI=") == NULL ) {
+        ERR("Wrong answer from server, got \"%s\" instead\r\n", cmd);
+        do {
+            ret = read(cmd, 200, 100);
+            if (ret < 0) {
+                ERR("Could not receive answer\r\n");
+                return false;
+            }
+            cmd[ret] = '\0';
+            printf("%s",cmd);
+        } while (ret > 0);
+        close();
+        return false;
+    }
+
+    INFO("\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, 1);
+}
+
+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) {
+            DBG("timeout ws\r\n");
+            return false;
+        }
+
+        socket.set_blocking(false, 1);
+        if (socket.receive(&opcode, 1) != 1) {
+            socket.set_blocking(false, 2000);
+            return false;
+        }
+
+        socket.set_blocking(false, 2000);
+
+        if (opcode == 0x81)
+            break;
+    }
+    DBG("opcode: 0x%X\r\n", opcode);
+
+    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;
+    }
+    DBG("length: %d\r\n", len_msg);
+    
+    if (is_masked) {
+        for (i = 0; i < 4; i++)
+            readChar(&c);
+        mask[i] = c;
+    }
+
+    int nb = read(message, len_msg, len_msg);
+    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) {
+        ERR("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) {
+    int res = 0, idx = 0;
+    
+    for (int j = 0; j < MAX_TRY_WRITE; j++) {
+
+        if ((res = socket.send_all(str + idx, len - idx)) == -1)
+            continue;
+
+        idx += res;
+        
+        if (idx == len)
+            return len;
+    }
+    
+    return (idx == 0) ? -1 : idx;
+}
+
+int Websocket::read(char * str, int len, int min_len) {
+    int res = 0, idx = 0;
+    
+    for (int j = 0; j < MAX_TRY_WRITE; j++) {
+
+        if ((res = socket.receive_all(str + idx, len - idx)) == -1)
+            continue;
+
+        idx += res;
+        
+        if (idx == len || (min_len != -1 && idx > min_len))
+            return idx;
+    }
+    
+    return (idx == 0) ? -1 : idx;
+}