Simple HTTP Server with one page index.html stored inside MBED as char vector and javascript to update a table content
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Diff: HTTP_SERVER.cpp
- Revision:
- 14:f21da0acc9f6
- Parent:
- 10:4a48594c2f44
diff -r b6dd6ed0060b -r f21da0acc9f6 HTTP_SERVER.cpp --- a/HTTP_SERVER.cpp Fri Mar 16 21:55:50 2018 +0000 +++ b/HTTP_SERVER.cpp Thu May 10 20:24:03 2018 +0000 @@ -1,9 +1,82 @@ #include "HTTP_SERVER.h" -#include "string" + #ifndef DEBUG //#define DEBUG #endif +//HTML file - with Javascript +const char *index_html = "<html><head><title>DCM Heaters Driver</title><link rel=\"shortcut icon\" type=\"image/x-icon\" href=\"http://cnpem.br/wp-content/uploads/2018/01/LNLS_Sirius-02-293x300.png\" />\n\ +<script src=\"https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js\"></script></head>\n\ +<script language=\"javascript\" type=\"text/javascript\">\n\ +function loop(){\n\ +$.post(\"read_data\", function(data){\n\ +if(data.length >0)\n\ +{\n\ +var str = data;\n\ +var res = str.split(\" \");\n\ +if(res.length == 97){\n\ +var table = '<div id=\"data_table\">'+\n\ +'<table width=\"100%\" border=\"1\" cellpadding=\"3\" cellspacing=\"1\" bgcolor=\"#E3EBFB\">'+\n\ +'<tr align=\"center\" valign=\"middle\">'+\n\ +'<td width=\"50\" height=\"40\"><strong>Channel</font></strong></td>'+\n\ +'<td width=\"96\" height=\"40\"><strong>Voltage (V)</font></strong></td>'+\n\ +'<td width=\"96\" height=\"40\"><strong>Current (A)</font></strong></td>'+\n\ +'<td width=\"96\" height=\"40\"><strong>Control (%)</font></strong></td>'+\n\ +'<td width=\"96\" height=\"40\"><strong>Current Limit (A)</font></strong></td>'+\n\ +'<td width=\"96\" height=\"40\"><strong>Failure</font></strong></td>'+\n\ +'<td width=\"96\" height=\"40\"><strong>Overload</font></strong></td>'+\n\ +'<td width=\"96\" height=\"40\"><strong>No Load</font></strong></td>'+\n\ +'<td width=\"96\" height=\"40\"><strong>Enable</font></strong></td></tr>';\n\ +for(var i=0;i<8;i++){\n\ +table = table + '<tr align=\"center\" valign=\"middle\">'+\n\ +'<td width=\"50\" height=\"31\"bgcolor=\"#FFFFFF\"><span style=\"font-weight:bold;\">'+(i+1)+'</span></td>'+\n\ +'<td width=\"96\" height=\"28\"bgcolor=\"#FFFFFF\"><span style=\"font-weight:bold;\">'+res[i*12]+'</span></td>'+\n\ +'<td width=\"96\" height=\"28\"bgcolor=\"#FFFFFF\"><span style=\"font-weight:bold;\">'+res[i*12+1]+'</span></td>'+\n\ +'<td width=\"96\" height=\"28\"bgcolor=\"#FFFFFF\"><span style=\"font-weight:bold;\">'+res[i*12+2]+'</span></td>'+\n\ +'<td width=\"96\" height=\"28\"bgcolor=\"#FFFFFF\"><span style=\"font-weight:bold;\">'+res[i*12+3]+'</span></td>'+\n\ +'<td width=\"96\" height=\"28\"bgcolor=\"'+res[i*12+4]+'\"><span style=\"font-weight:bold;\">'+res[i*12+5]+'</span></td>'+\n\ +'<td width=\"96\" height=\"28\"bgcolor=\"'+res[i*12+6]+'\"><span style=\"font-weight:bold;\">'+res[i*12+7]+'</span></td>'+\n\ +'<td width=\"96\" height=\"28\"bgcolor=\"'+res[i*12+8]+'\"><span style=\"font-weight:bold;\">'+res[i*12+9]+'</span></td>'+\n\ +'<td width=\"96\" height=\"28\"bgcolor=\"'+res[i*12+10]+'\"><span style=\"font-weight:bold;\">'+res[i*12+11]+'</span></td>'+\n\ +'</tr>';\n\ +}\n\ +table = table + '</table></div>';\n\ +document.getElementById(\"data_table\").innerHTML = table;\n\ +}}\n\ +});\n\ +setTimeout(function(){ loop() }, 2000);\n\ +}\n\ +</script>\n\ +<body onLoad=\"loop()\">\n\ +<table width=\"100%\"border=\"0\" cellspacing=\"0\" cellpadding=\"0\" style=\"font-weight:normal;\">\n\ +<tr>\n\ +<td width=\"25%\" height=\"142\" align=\"center\" valign=\"middle\" style=\"border-bottom: #000000 solid 1px;\">\n\ +<a href=\"http://www.lnls.cnpem.br/\"><img src=\"http://lnls.cnpem.br/wp-content/themes/lnls-v2/assets/images/logo-header.svg\" alt=\"LNLS\" width=\"305\" height=\"142\" /></a></td>\n\ +<td colspan=\"5\" height=\"142\" align=\"center\" scope=\"col\" style=\"border-bottom: #000000 solid 1px;\"><p><span class=\"style7\">DCM HEATERS DRIVER<br /><br/>\n\ +<strong>DIAGNOSTICS<br/></strong></span></p>\n\ +<p><span class=\"style7\"><strong><em> <a href=\"http://www.lnls.cnpem.br\">LNLS</a></em></strong></span></p></td>\n\ +<td width=\"25%\" height=\"142\" align=\"center\" style=\"border-bottom: #000000 solid 1px;\">\n\ +<a href=\"http://www.lnls.cnpem.br/grupos/gae/\"><img src=\"http://www.gae.agency/wp-content/uploads/2016/03/Logo_gae_hp_blue.png\" alt=\"GAE\" width=\"305\" height=\"99\" /></a></td>\n\ +</tr>\n\ +</table>\n<div id=\"data_table\"></div></body></html>\0"; + +//table colors vector +const char *color[] = {"#C8FFC8\0","#FF0000\0"}; + +int index_html_len; //index with html length + +char buffer[MAX_BUFFER_SIZE]; //receive and transmit buffer +char tmp_buffer[200]; //aux buffer +int status_code; //http status code +char reason_phrase[30]; //http reason phrase + +char httpmethod[20]; //http method +char filepath[20]; //file requested +char http_ver[20]; //http version + +int idx_buffer; //index buffer + +//Debug functions namespace HTTP_SERVER { void DEBUG_PRINT_LINE(const char* arg_line) @@ -37,181 +110,124 @@ HttpServer::HttpServer() { - keep_alive = (false); - listening_flag = (false); - req_buf[0] = '\0'; + buffer[0] = '\0'; //constructor } HttpServer::~HttpServer() { } - bool HttpServer::init() { - -// Ethernet Initialization - if(eth.init()) { - printf("(HTTP_SERVER) Error!@EthernetInterface::init()\r\n"); - return false; - } - // Ethernet Connecting setup - if(eth.connect()) { - printf("(HTTP_SERVER) Error!@EthernetInterface::connect()\r\n"); - return false; - } else { - printf("(HTTP_SERVER) IP Address is %s\r\n", eth.getIPAddress()); - } // TCP Socket setup // To open Server-side PORT if(tcpsvr.bind(TCP_PORT)< 0) { - printf("(HTTP_SERVER) Error!@TCPSocketServer::bind()\r\n"); return false; - } else { - printf("(HTTP_SERVER) TCP Server has bounden!\r\n"); - } + } + tcpsvr.set_blocking(true,1500); //set blocking socket + // Server start listening Request from a web browser. - if(tcpsvr.listen(1) < 0) { - printf("(HTTP_SERVER) tcp server listen failed.\r\n"); + + if(tcpsvr.listen(5) < 0) { return false; - } else { - listening_flag = true; - printf("(HTTP_SERVER) tcp server is listening...\r\n"); } + + index_html_len = strlen(index_html); //calculate string length return true; } -bool HttpServer::run() -{ - DigitalOut led1(LED1); - DigitalOut led2(LED1); - - while (listening_flag) { - led1 = true; - // blocking mode (never timeout) - // waiting client connection - printf("(HTTP_SERVER) waiting connection\r\n"); - if(tcpsvr.accept(tcpcon) < 0) { - printf("(HTTP_SERVER) failed to accept connection.\r\n"); - return -1; - } else { - printf("(HTTP_SERVER) connection success!\r\nIP: %s\r\n",tcpcon.get_address()); - led2 = true; +bool HttpServer::run(channel *CH) +{ + if(tcpsvr.accept(tcpcon) < 0) { + //printf("(HTTP_SERVER) failed to accept connection.\r\n"); + return -1; + } + // When conected + while(tcpcon.is_connected()) + { + tcpcon.set_blocking(false,100); + // + // Request Analysis + // + + DEBUG_PRINT_LINE("DEBUG MODE"); + switch(tcpcon.receive(buffer, 1023)) { + case 0: + //DEBUG_PRINT_LINE("received buffer is empty."); + status_code = 400; + sprintf(reason_phrase,"No Request\0"); + httpmethod[0] = '\0'; + filepath[0] = '\0'; + http_ver[0] = '\0'; + break; + case -1: + DEBUG_PRINT_LINE("failed to read data from client."); + status_code = 500; + sprintf(reason_phrase,"Internal Server Error\0"); + httpmethod[0] = '\0'; + filepath[0] = '\0'; + http_ver[0] = '\0'; + break; + default: + DEBUG_PRINT_LINE("Received Data: %d",strlen(buffer)); + DEBUG_PRINT_LINE("-->\r\n"); + DEBUG_PRINT_LINE("%.*s[End of Request]",strlen(buffer),buffer); + // get HTTP method, File path, HTTP version + sprintf(httpmethod,strtok(buffer," ")); + filepath[0] = '\0'; + sprintf(http_ver,"HTTP/1.1\0"); + DEBUG_PRINT_LINE("httpmethod: %s", httpmethod); + DEBUG_PRINT_LINE("file path: %s", filepath); + DEBUG_PRINT_LINE("http ver : %s", http_ver); + break; } - // When conected - while(tcpcon.is_connected()) { - printf("(HTTP_SERVER) connected\r\n"); - - char buffer[1024] = {0}; - char* httpmethod = NULL; - char* filepath = NULL; - char* http_ver = NULL; - char* header_field_name = NULL; - char* header_field_val = NULL; - - // - // Request Analysis - // - DEBUG_PRINT_LINE("DEBUG MODE"); - switch(tcpcon.receive(buffer, 1023)) { - case 0: - DEBUG_PRINT_LINE("recieved buffer is empty."); - msger.setStatusLine(400, "No Request"); - if(msger.setHeaderField("Connection", "Close"))DEBUG_PRINT_LINE("buffer over flow @ ResponseMessenger"); - httpmethod = NULL; - filepath = NULL; - http_ver = NULL; - break; - case -1: - DEBUG_PRINT_LINE("failed to read data from client."); - msger.setStatusLine(500, "Internal Server Error"); - if(msger.setHeaderField("Connection", "Close"))DEBUG_PRINT_LINE("buffer over flow @ ResponseMessenger"); - httpmethod = NULL; - filepath = NULL; - http_ver = NULL; - break; - default: - DEBUG_PRINT_LINE("Recieved Data: %d",strlen(buffer)); - DEBUG_PRINT_LINE("-->\r\n"); - DEBUG_PRINT_LINE("%.*s[End of Request]",strlen(buffer),buffer); - // get HTTP method, File path, HTTP version - httpmethod = strtok(buffer," "); - filepath = strtok(NULL, " "); - http_ver = strtok(NULL, "\r\n"); - DEBUG_PRINT_LINE("httpmethod: %s", httpmethod); - DEBUG_PRINT_LINE("file path: %s", filepath); - DEBUG_PRINT_LINE("http ver : %s", http_ver); - break; - } + + if (httpmethod[0] == '\0') { + buffer[MAX_BUFFER_SIZE - 1] = '\0'; + sprintf(buffer,"%s %d %s\r\nConnection: Close\r\n\r\n\0", http_ver, status_code, reason_phrase); + DEBUG_PRINT_LINE("echo back done."); + break; + } + + // Response + if (strcmp(httpmethod,"GET") == 0 ) //GET request - always index.html stoed in index_html + { + DEBUG_PRINT_LINE("GET request incomming."); + + buffer[MAX_BUFFER_SIZE-1] = '\0'; + status_code = 200; + sprintf(reason_phrase,"OK\0"); - // - // Response - // - if (strcmp(httpmethod,"GET") == 0 ) { - DEBUG_PRINT_LINE("GET request incomming."); + sprintf(buffer,"%s %d %s\r\nConnection: Close\r\nContent-Type: text/html\r\nKeep-Alive: timeout=15\r\n\r\n\0", http_ver, status_code, reason_phrase); + tcpcon.send_all(buffer,strlen(buffer)); + tcpcon.send_all((char*)index_html,index_html_len); + + break; + } + if (strcmp(httpmethod,"POST") == 0 ) //POST request - javascript request + { + DEBUG_PRINT_LINE("POST request incomming."); + status_code = 200; + sprintf(reason_phrase,"OK\0"); + + sprintf(buffer,"%s %d %s\r\nConnection: Close\r\n\r\n\0", http_ver, status_code, reason_phrase); - // file calibration - DEBUG_PRINT_LINE("file opening"); - fhandl.open(filepath,"rb"); - if(fhandl.arrival()) { - msger.setStatusLine(200, "OK"); - if(msger.setHeaderField("Content-Length", fhandl.getFileSize())) DEBUG_PRINT_LINE("buffer over flow @ ResponseMessenger"); - if(msger.setHeaderField("Connection", "keep-alive")) DEBUG_PRINT_LINE("buffer over flow @ ResponseMessenger"); - } else { - if(msger.setStatusLine(404, "NOT FOUND")) DEBUG_PRINT_LINE("buffer over flow @ ResponseMessenger"); - if(msger.setHeaderField("Connection", "Close")) DEBUG_PRINT_LINE("buffer over flow @ ResponseMessenger"); - DEBUG_PRINT_LINE("NOT FOUND"); - } - if( !strcmp(fhandl.getSuffix(), "htm" ) || - !strcmp(fhandl.getSuffix(), "HTM" ) || - !strcmp(fhandl.getSuffix(), "html") || - !strcmp(fhandl.getSuffix(), "HTML")){ - if(msger.setHeaderField("Content-Type", "text/html")) DEBUG_PRINT_LINE("buffer over flow @ ResponseMessenger"); - } else if( !strcmp(fhandl.getSuffix(), "js" )){ - if(msger.setHeaderField("Content-Type", "text/javascript")) DEBUG_PRINT_LINE("buffer over flow @ ResponseMessenger"); - } else if ( !strcmp(fhandl.getSuffix(), "ico" )){ - if(msger.setHeaderField("Content-Type", "image/png")) DEBUG_PRINT_LINE("buffer over flow @ ResponseMessenger"); - } else if ( !strcmp(fhandl.getSuffix(), "png" ) || - !strcmp(fhandl.getSuffix(), "PNG" )){ - if(msger.setHeaderField("Content-Type", "image/png")) DEBUG_PRINT_LINE("buffer over flow @ ResponseMessenger"); - } else if ( !strcmp(fhandl.getSuffix(), "jpg" ) || - !strcmp(fhandl.getSuffix(), "JPG" )){ - if(msger.setHeaderField("Content-Type", "image/jpg")) DEBUG_PRINT_LINE("buffer over flow @ ResponseMessenger"); - } else { - msger.setStatusLine(406, "not acceptable"); - } + for(idx_buffer=0;idx_buffer<=7;idx_buffer++) + { + sprintf(tmp_buffer,"%4.2f %3.2f %d %3.2f %s %d %s %d %s %d %s %d \0",CH[idx_buffer].voltage,CH[idx_buffer].current,CH[idx_buffer].control,CH[idx_buffer].limit,\ + color[CH[idx_buffer].failure>0],CH[idx_buffer].failure,\ + color[CH[idx_buffer].overload>ERROR_REP],CH[idx_buffer].overload>ERROR_REP,\ + color[CH[idx_buffer].noload>ERROR_REP],CH[idx_buffer].noload>ERROR_REP,\ + color[CH[idx_buffer].enable==0],CH[idx_buffer].enable); + strcat(buffer,tmp_buffer); - // Connection timeout field - if(msger.setHeaderField("Keep-Alive", "timeouit=15")) DEBUG_PRINT_LINE("buffer over flow @ ResponseMessenger"); - - // send response - msger.sendHTTPResponse(tcpcon, fhandl); + } + tcpcon.send_all(buffer,strlen(buffer)); + break; + - //file close - if( fhandl.close()== 0) - DEBUG_PRINT_LINE("file has closed"); - else if(EOF) - DEBUG_PRINT_LINE("failed to close the file"); - - msger.resetHeader(); - DEBUG_PRINT_LINE("echo back done."); - } - if (httpmethod == NULL) { - msger.sendHTTPResponse(tcpcon); - msger.resetHeader(); - DEBUG_PRINT_LINE("echo back done."); - } - printf("(HTTP_SERVER) Response to Request has done\r\n"); - // - // - // - } - printf("(HTTP_SERVER) close connection.\r\ntcp server is listening...\r\n"); - tcpcon.close(); - led2 = false; + } } - tcpsvr.close(); - listening_flag = false; - led1 = false; + tcpcon.close(); //always close the connection return 0; } \ No newline at end of file