inkblot/esp32-lilygo-t5
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allow updating screen via web interface

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This commit is contained in:
arne 2025-10-07 02:02:13 +02:00
commit 8986c51d4d
4 changed files with 54 additions and 26 deletions
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29
main/inkpot.c
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@ -24,8 +24,8 @@
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#endif
/* Scratch buffer size for sending files to HTTP clients */
#define SCRATCH_BUFSIZE 8192
// Scratch buffer size for sending files to HTTP clients
#define SCRATCH_BUFSIZE 2048
struct file_server_data {
/* Scratch buffer for temporary storage during file transfer */
@ -241,9 +241,7 @@ esp_err_t http_draw(httpd_req_t* req) {
return ESP_ERR_INVALID_ARG;
}
// READING STREAM
int ret, remaining = req->content_len;
while (remaining > 0) {
/* Read the data for the request */
if ((ret = httpd_req_recv(req, buf,
@ -255,8 +253,6 @@ esp_err_t http_draw(httpd_req_t* req) {
return ESP_FAIL;
}
/* Send back the same data */
httpd_resp_send_chunk(req, buf, ret);
remaining -= ret;
/* Log data received */
@ -265,18 +261,29 @@ esp_err_t http_draw(httpd_req_t* req) {
ESP_LOGI(TAG, "====================================");
}
// TODO: Error handling
// Extract script from multipart-encoded POST body
// NOTE: This will break as soon as you send more than just the script. Be careful!
int first_lf = strcspn(buf, "\n") + 2; // get form boundary length
buf[strlen(buf) - first_lf - 2] = 0; // remove form boundary at end
memmove(buf, buf + first_lf, strlen(buf) - first_lf + 1);
// take only part after headers, which is designated by a dual linebreak
int header_end = strcspn(buf, "\n\n") + 3;
memmove(buf, buf + header_end, strlen(buf) - header_end + 1);
ESP_LOGI(TAG, "%s", buf);
// TODO: Error handling; we could probably even notify about syntax errors?
vTaskPrioritySet(NULL, tskIDLE_PRIORITY); // ensure that FreeRTOS task watchdog does not complain
run_lua_string(buf, "E-Paper Script via HTTP");
heap_caps_free(buf);
// Done reading
char response[100];
sprintf(
response, "script drawn!"
);
sprintf(response, "Thanks, I updated my screen!");
httpd_resp_set_type(req, "text/plain");
httpd_resp_set_status(req, "200");
httpd_resp_set_status(req, "301");
httpd_resp_set_hdr(req, "Location", "/");
httpd_resp_send(req, response, HTTPD_RESP_USE_STRLEN);
return ESP_OK;
}