inkblot/esp32-lilygo-t5
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This commit is contained in:
arne 2025-10-06 21:36:03 +02:00
commit d3de814d75
1 changed files with 57 additions and 14 deletions
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71
main/inkpot.c
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@ -24,6 +24,14 @@
#define MIN(a, b) (((a) < (b)) ? (a) : (b)) #define MIN(a, b) (((a) < (b)) ? (a) : (b))
#endif #endif
/* Scratch buffer size for sending files to HTTP clients */
#define SCRATCH_BUFSIZE 8192
struct file_server_data {
/* Scratch buffer for temporary storage during file transfer */
char scratch[SCRATCH_BUFSIZE];
};
static const char *TAG = "inkpot"; static const char *TAG = "inkpot";
// Function to log memory usage with the message at the end // Function to log memory usage with the message at the end
@ -184,16 +192,37 @@ void scan_wifi_networks(void) {
// HTTP Server // HTTP Server
#define WRITE_HEADER(req, buffer, name, format, src) \
sprintf(buffer, format, src); \
ESP_ERROR_CHECK(httpd_resp_set_hdr(req, name, buffer));
static esp_err_t http_index(httpd_req_t* req) { static esp_err_t http_index(httpd_req_t* req) {
// TODO: Serve HTML file with form POSTing to `/draw` char index_path[128];
const char* response = "Hello world!\n"; strcpy(index_path, LFS_PATH);
httpd_resp_set_type(req, "text/plain"); strcat(index_path, "/http/index.html");
httpd_resp_set_status(req, "200");
httpd_resp_send(req, response, HTTPD_RESP_USE_STRLEN); FILE *fd = fopen(index_path, "r");
char *chunk = ((struct file_server_data *)req->user_ctx)->scratch;
size_t chunksize;
do {
/* Read file in chunks into the scratch buffer */
chunksize = fread(chunk, 1, SCRATCH_BUFSIZE, fd);
if (chunksize > 0) {
/* Send the buffer contents as HTTP response chunk */
if (httpd_resp_send_chunk(req, chunk, chunksize) != ESP_OK) {
fclose(fd);
ESP_LOGE(TAG, "File sending failed!");
/* Abort sending file */
httpd_resp_sendstr_chunk(req, NULL);
/* Respond with 500 Internal Server Error */
httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Failed to send file");
return ESP_FAIL;
}
}
/* Keep looping till the whole file is sent */
} while (chunksize != 0);
fclose(fd);
httpd_resp_set_hdr(req, "Connection", "close");
httpd_resp_send_chunk(req, NULL, 0);
ESP_LOGI(TAG, "Sent index.html");
return ESP_OK; return ESP_OK;
} }
@ -252,17 +281,33 @@ esp_err_t http_draw(httpd_req_t* req) {
return ESP_OK; return ESP_OK;
} }
void register_http_routes(httpd_handle_t server) { esp_err_t register_http_routes(httpd_handle_t server) {
static struct file_server_data *server_data = NULL;
if (server_data) {
ESP_LOGE(TAG, "File server already started");
return ESP_ERR_INVALID_STATE;
}
// Allocate memory for server data
server_data = calloc(1, sizeof(struct file_server_data));
if (!server_data) {
ESP_LOGE(TAG, "Failed to allocate memory for server data");
return ESP_ERR_NO_MEM;
}
{ {
httpd_uri_t uri httpd_uri_t uri
= { .uri = "/", .method = HTTP_GET, .handler = http_index, .user_ctx = NULL }; = { .uri = "/", .method = HTTP_GET, .handler = http_index, .user_ctx = server_data };
httpd_register_uri_handler(server, &uri); httpd_register_uri_handler(server, &uri);
} }
{ {
httpd_uri_t uri httpd_uri_t uri
= { .uri = "/draw", .method = HTTP_POST, .handler = http_draw, .user_ctx = NULL }; = { .uri = "/draw", .method = HTTP_POST, .handler = http_draw, .user_ctx = server_data };
httpd_register_uri_handler(server, &uri); httpd_register_uri_handler(server, &uri);
} }
return ESP_OK;
} }
// init // init
@ -279,8 +324,6 @@ void app_main(void) {
} }
ESP_ERROR_CHECK(ret); ESP_ERROR_CHECK(ret);
// FIXME: Wifi server causes some crash, failing to yield to watchdog in time
// Set up HTTP server
httpd_handle_t server = get_server(); httpd_handle_t server = get_server();
if (server != NULL) { if (server != NULL) {
register_http_routes(server); register_http_routes(server);