Mauricio Donatti
Simple HTTP Server with one page index.html stored inside MBED as char vector and javascript to update a table content
Fork of
HTTP_SERVER
by 
Akifumi Takahashi
HTTP_SERVER.cpp
- Committer:
- mmdonatti
- Date:
- 2018-05-10
- Revision:
- 14:f21da0acc9f6
- Parent:
- 10:4a48594c2f44
File content as of revision 14:f21da0acc9f6:
#include "HTTP_SERVER.h"
#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)
{
#ifdef DEBUG
printf("(HTTP_SERVER) ")
printf(arg_line);
printf("\r\n");
#endif
}
template<typename T>
void DEBUG_PRINT_LINE(const char* arg_line, T arg_t)
{
#ifdef DEBUG
printf("(HTTP_SERVER) ");
printf(arg_line, arg_t);
printf("\r\n");
#endif
}
template<typename T1, typename T2>
void DEBUG_PRINT_LINE(const char* arg_line, T1 arg_t1, T2 arg_t2)
{
#ifdef DEBUG
printf("(HTTP_SERVER) ");
printf(arg_line, arg_t1, arg_t2);
printf("\r\n");
#endif
}
}
using namespace HTTP_SERVER;
HttpServer::HttpServer()
{
buffer[0] = '\0'; //constructor
}
HttpServer::~HttpServer()
{
}
bool HttpServer::init()
{
// TCP Socket setup
// To open Server-side PORT
if(tcpsvr.bind(TCP_PORT)< 0) {
return false;
}
tcpsvr.set_blocking(true,1500); //set blocking socket
// Server start listening Request from a web browser.
if(tcpsvr.listen(5) < 0) {
return false;
}
index_html_len = strlen(index_html); //calculate string length
return 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;
}
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");
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);
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);
}
tcpcon.send_all(buffer,strlen(buffer));
break;
}
}
tcpcon.close(); //always close the connection
return 0;
}