ESPTerm - ESP8266 terminal emulator. Branches: [master] patches, [work] next release
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espterm-firmware/user/cgi_sockets.c

187 lines
4.6 KiB

#include <esp8266.h>
#include <httpd.h>
#include <cgiwebsocket.h>
#include "cgi_sockets.h"
#include "uart_driver.h"
#include "screen.h"
#include "uart_buffer.h"
#include "ansi_parser.h"
#define SOCK_BUF_LEN 1024
static char sock_buff[SOCK_BUF_LEN];
volatile bool notify_available = true;
volatile bool notify_cooldown = false;
static ETSTimer notifyContentTim;
static ETSTimer notifyLabelsTim;
static ETSTimer notifyCooldownTim;
// we're trying to do a kind of mutex here, without the actual primitives
// this might glitch, very rarely.
// it's recommended to put some delay between setting labels and updating the screen.
/**
* Cooldown delay is over
* @param arg
*/
static void ICACHE_FLASH_ATTR
notifyCooldownTimCb(void *arg)
{
notify_cooldown = false;
}
static void ICACHE_FLASH_ATTR
notifyContentTimCb(void *arg)
{
void *data = NULL;
int max_bl, total_bl;
cgiWebsockMeasureBacklog(URL_WS_UPDATE, &max_bl, &total_bl);
if (!notify_available || notify_cooldown || (max_bl > 2048)) { // do not send if we have anything significant backlogged
// postpone a little
TIMER_START(&notifyContentTim, notifyContentTimCb, 5, 0);
return;
}
notify_available = false;
for (int i = 0; i < 20; i++) {
httpd_cgi_state cont = screenSerializeToBuffer(sock_buff, SOCK_BUF_LEN, &data);
int flg = 0;
if (cont == HTTPD_CGI_MORE) flg |= WEBSOCK_FLAG_MORE;
if (i > 0) flg |= WEBSOCK_FLAG_CONT;
cgiWebsockBroadcast(URL_WS_UPDATE, sock_buff, (int) strlen(sock_buff), flg);
if (cont == HTTPD_CGI_DONE) break;
}
// cleanup
screenSerializeToBuffer(NULL, SOCK_BUF_LEN, &data);
notify_cooldown = true;
notify_available = true;
TIMER_START(&notifyCooldownTim, notifyCooldownTimCb, termconf->display_cooldown_ms, 0);
}
static void ICACHE_FLASH_ATTR
notifyLabelsTimCb(void *arg)
{
if (!notify_available || notify_cooldown) {
// postpone a little
TIMER_START(&notifyLabelsTim, notifyLabelsTimCb, 1, 0);
return;
}
notify_available = false;
screenSerializeLabelsToBuffer(sock_buff, SOCK_BUF_LEN);
cgiWebsockBroadcast(URL_WS_UPDATE, sock_buff, (int) strlen(sock_buff), 0);
notify_cooldown = true;
notify_available = true;
TIMER_START(&notifyCooldownTim, notifyCooldownTimCb, termconf->display_cooldown_ms, 0);
}
/** Beep */
void ICACHE_FLASH_ATTR
send_beep(void)
{
// here's some potential for a race error with the other broadcast functions :C
cgiWebsockBroadcast(URL_WS_UPDATE, "B", 1, 0);
}
/**
* Broadcast screen state to sockets.
* This is a callback for the Screen module,
* called after each visible screen modification.
*/
void ICACHE_FLASH_ATTR screen_notifyChange(ScreenNotifyChangeTopic topic)
{
// this is not the most ideal/cleanest implementation
// PRs are welcome for a nicer update "queue" solution
if (termconf->display_tout_ms == 0) termconf->display_tout_ms = SCR_DEF_DISPLAY_TOUT_MS;
// NOTE: the timers are restarted if already running
if (topic == CHANGE_LABELS) {
// separate timer from content change timer, to avoid losing that update
TIMER_START(&notifyLabelsTim, notifyLabelsTimCb, termconf->display_tout_ms, 0);
}
else if (topic == CHANGE_CONTENT) {
// throttle delay
TIMER_START(&notifyContentTim, notifyContentTimCb, termconf->display_tout_ms, 0);
}
}
/** Socket received a message */
void ICACHE_FLASH_ATTR updateSockRx(Websock *ws, char *data, int len, int flags)
{
char buf[20];
// Add terminator if missing (seems to randomly happen)
data[len] = 0;
// TODO re-implement those, use single byte markers and B2 encoding
ws_dbg("Sock RX str: %s, len %d", data, len);
if (strstarts(data, "STR:")) {
// pass string verbatim
UART_SendAsync(data+4, -1);
// debug loopback
// for(int i=4;i<strlen(data); i++) {
// ansi_parser(data[i]);
// }
}
else if (strstarts(data, "BTN:")) {
// send button as low ASCII value 1-9
u8 btnNum = (u8) (data[4] - '0');
if (btnNum > 0 && btnNum < 10) {
UART_SendAsync((const char *) &btnNum, 1);
}
}
else if (strstarts(data, "TAP:")) {
// this comes in as 0-based
int y=0, x=0;
char *pc=data+4;
char c;
int phase=0;
while((c=*pc++) != '\0') {
if (c==','||c==';') {
phase++;
}
else if (c>='0' && c<='9') {
if (phase==0) {
y=y*10+(c-'0');
} else {
x=x*10+(c-'0');
}
}
}
if (!screen_isCoordValid(y, x)) {
ws_warn("Mouse input at invalid coordinates");
return;
}
ws_dbg("Screen clicked at row %d, col %d", y+1, x+1);
// Send as 1-based to user
sprintf(buf, "\033[%d;%dM", y+1, x+1);
UART_SendAsync(buf, -1);
}
else {
ws_warn("Bad command.");
}
}
/** Socket connected for updates */
void ICACHE_FLASH_ATTR updateSockConnect(Websock *ws)
{
ws_info("Socket connected to "URL_WS_UPDATE);
ws->recvCb = updateSockRx;
}