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

157 lines
3.8 KiB

#include <esp8266.h>
#include <httpd.h>
#include <cgiwebsocket.h>
#include "cgi_sockets.h"
#include "uart_driver.h"
#include "screen.h"
#define SOCK_BUF_LEN 2048
static char sock_buff[SOCK_BUF_LEN];
volatile bool notify_available = true;
static ETSTimer notifyTim;
static ETSTimer notifyTim2;
// 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.
static void ICACHE_FLASH_ATTR
notifyTimCb(void *arg) {
void *data = NULL;
if (!notify_available) {
// postpone a little
os_timer_disarm(&notifyTim);
os_timer_setfn(&notifyTim, notifyTimCb, NULL);
os_timer_arm(&notifyTim, 1, 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_available = true;
}
static void ICACHE_FLASH_ATTR
notifyLabelsTimCb(void *arg)
{
if (!notify_available) {
// postpone a little
os_timer_disarm(&notifyTim2);
os_timer_setfn(&notifyTim2, notifyLabelsTimCb, NULL);
os_timer_arm(&notifyTim2, 1, 0);
return;
}
notify_available = false;
screenSerializeLabelsToBuffer(sock_buff, SOCK_BUF_LEN);
cgiWebsockBroadcast(URL_WS_UPDATE, sock_buff, (int) strlen(sock_buff), 0);
notify_available = true;
}
/**
* 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 (topic == CHANGE_LABELS) {
// separate timer from content change timer, to avoid losing that update
os_timer_disarm(&notifyTim2);
os_timer_setfn(&notifyTim2, notifyLabelsTimCb, NULL);
os_timer_arm(&notifyTim2, SCREEN_NOTIFY_DELAY_MS, 0);
}
else if (topic == CHANGE_CONTENT) {
// throttle delay
os_timer_disarm(&notifyTim);
os_timer_setfn(&notifyTim, notifyTimCb, NULL);
os_timer_arm(&notifyTim, SCREEN_NOTIFY_DELAY_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
dbg("Sock RX str: %s, len %d", data, len);
if (strstarts(data, "STR:")) {
// pass string verbatim
UART_WriteString(UART0, data+4, UART_TIMEOUT_US);
}
else if (strstarts(data, "BTN:")) {
// send button as low ASCII value 1-9
int btnNum = data[4] - '0';
if (btnNum > 0 && btnNum < 10) {
UART_WriteChar(UART0, (unsigned char)btnNum, UART_TIMEOUT_US);
}
}
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)) {
warn("Mouse input at invalid coordinates");
return;
}
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_WriteString(UART0, buf, UART_TIMEOUT_US);
}
else {
warn("Bad command.");
}
}
/** Socket connected for updates */
void ICACHE_FLASH_ATTR updateSockConnect(Websock *ws)
{
info("Socket connected to "URL_WS_UPDATE);
ws->recvCb = updateSockRx;
}