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#include <esp_log.h>
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#include <esp_err.h>
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#include <fileserver/token_subs.h>
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#include <application.h>
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#include <httpd_utils/captive.h>
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#include "websrv.h"
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#include "esp_http_server.h"
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#include "utils.h"
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#include "www_files_enum.h"
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#include "data_report.h"
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static const char *TAG = "websrv";
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static httpd_handle_t s_hServer = NULL;
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// Embedded files (must also be listed in CMakeLists.txt as COMPONENT_EMBED_TXTFILES)
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efile(index_file, "index_html");
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static struct tpl_kv_list build_index_replacements_kv(void) {
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//char name[TPL_KV_KEY_LEN];
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struct tpl_kv_list kv = tpl_kv_init();
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tpl_kv_add(&kv, "version", APP_VERSION);
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return kv;
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}
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/* Main page */
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static esp_err_t handler_index(httpd_req_t *req) {
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struct tpl_kv_list kv = build_index_replacements_kv();
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esp_err_t suc = httpd_send_template_file(req, FILE_INDEX_HTML, tpl_kv_replacer, &kv, 0);
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tpl_kv_free(&kv);
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return suc;
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}
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/* Update XHR for new index page data */
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static esp_err_t handler_update(httpd_req_t *req) {
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struct tpl_kv_list kv = build_index_replacements_kv();
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esp_err_t suc = tpl_kv_send_as_ascii_map(req, &kv);
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tpl_kv_free(&kv);
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return suc;
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}
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/* Set a param */
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static esp_err_t handler_set(httpd_req_t *req) {
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char buf[64];
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int n = httpd_req_recv(req, buf, 63);
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if (n < 0) {
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ESP_LOGW(TAG, "rx er");
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goto err;
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}
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buf[n] = 0;
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char keybuf[20];
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char valbuf[20];
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if (ESP_OK != httpd_query_key_value(buf, "key", keybuf, 20)) goto err;
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if (ESP_OK != httpd_query_key_value(buf, "value", valbuf, 20)) goto err;
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// TODO
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ESP_LOGW(TAG, "bad key %s", keybuf);
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goto err;
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return httpd_resp_send(req, NULL, 0);
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err:
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return httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, NULL);
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}
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/* Request emulator reboot */
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static esp_err_t handler_reboot(httpd_req_t *req) {
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httpd_resp_send(req, "<!DOCTYPE html><html><head>"
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"<meta http-equiv=\"refresh\" content=\"10; url=/\">"
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"</head>"
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"<body>"
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"Reboot requested. Reloading in 10 seconds.<br>"
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"<a href=\"/\">Try now.</a>", -1);
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ESP_LOGI(TAG, "Restarting ESP...");
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esp_restart();
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}
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static esp_err_t handler_sample(httpd_req_t *req) {
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char *msg = malloc(256);
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if (!msg) return ESP_ERR_NO_MEM;
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// TODO use cJSON
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char *wp = msg;
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wp += sprintf(wp, "{");
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bool need_comma = false;
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if (g_data_report.iaq_ready) {
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if (timestamp_age(g_data_report.iaq_timestamp) < DATA_MAX_AGE) {
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wp += sprintf(wp, "\"iaq\":%.2f,\"iaq_s\":%.2f,\"iaq_co2\":%.2f,\"iaq_voc\":%.2f",
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g_data_report.iaq,
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g_data_report.iaq_static,
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g_data_report.iaq_co2_ppm_equiv,
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g_data_report.iaq_voc_ppm_equiv);
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need_comma = true;
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} else {
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g_data_report.iaq_ready = false;
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}
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}
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if (g_data_report.thpg_ready) {
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if (timestamp_age(g_data_report.thpg_timestamp) < DATA_MAX_AGE) {
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wp += sprintf(wp, "%s\"temp\":%.2f,\"temp_r\":%.2f,\"hum\":%.2f,\"hum_r\":%.2f,\"pres\":%.1f,\"gas_r\":%.1f",
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need_comma ? "," : "",
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g_data_report.temperature,
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g_data_report.temperature_raw,
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g_data_report.humidity,
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g_data_report.humidity_raw,
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g_data_report.pressure,
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g_data_report.gas_raw);
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need_comma = true;
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} else {
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g_data_report.thpg_ready = false;
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}
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}
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if (g_data_report.co2_ready) {
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if (timestamp_age(g_data_report.co2_timestamp) < DATA_MAX_AGE) {
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wp += sprintf(wp, "%s\"co2\":%.2f",
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need_comma ? "," : "",
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g_data_report.co2_ppm);
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} else {
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g_data_report.co2_ready = false;
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}
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}
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sprintf(wp, "}");
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esp_err_t rv = httpd_resp_send(req, msg, -1);
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free(msg);
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return rv;
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}
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/* An HTTP GET handler */
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static esp_err_t handler_staticfiles(httpd_req_t *r) {
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const struct embedded_file_info *file;
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const char *fname = r->user_ctx;
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enum file_access_level access = FILE_ACCESS_PROTECTED;
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// wildcard files must be public
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if (fname == NULL) {
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fname = r->uri + 1; // URI always starts with slash, but we dont want a slash in the file name
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access = FILE_ACCESS_PUBLIC;
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}
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#if USE_CAPTIVE_PORTAL
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// First check if this is a phone taken here by the captive portal
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esp_err_t rv = httpd_captive_redirect(r);
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if (rv != ESP_ERR_NOT_FOUND) return rv;
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#endif
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if (ESP_OK != www_get_static_file(fname, access, &file)) {
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ESP_LOGW(TAG, "File not found: %s", fname);
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return httpd_resp_send_404(r);
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} else {
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if (streq(file->mime, "text/html")) {
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// using the template func to allow includes
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return httpd_send_template_file_struct(r, file, /*replacer*/NULL, /*ctx*/NULL, /*opts*/0);
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} else {
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return httpd_send_static_file_struct(r, file, TPL_ESCAPE_NONE, 0);
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}
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}
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}
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static const httpd_uri_t routes[] = {
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{
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.uri = "/",
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.method = HTTP_GET,
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.handler = handler_index,
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},
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{
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.uri = "/data",
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.method = HTTP_GET,
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.handler = handler_update,
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},
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{
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.uri = "/set",
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.method = HTTP_POST,
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.handler = handler_set,
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},
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{
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.uri = "/reboot",
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.method = HTTP_GET,
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.handler = handler_reboot,
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},
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{
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.uri = "/sample",
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.method = HTTP_GET,
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.handler = handler_sample,
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},
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{
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.uri = "*", // any file except protected (e.g. not HTML, PEM etc)
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.method = HTTP_GET,
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.handler = handler_staticfiles,
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},
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};
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esp_err_t websrv_init(void) {
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httpd_config_t config = HTTPD_DEFAULT_CONFIG();
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config.max_open_sockets = 3;
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config.uri_match_fn = httpd_uri_match_wildcard;
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config.lru_purge_enable = true;
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ESP_LOGI(TAG, "Starting HTTP server on port: '%d'", config.server_port);
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esp_err_t suc = httpd_start(&s_hServer, &config);
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if (suc == ESP_OK) {
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ESP_LOGI(TAG, "HTTP server started");
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for (int i = 0; i < sizeof(routes) / sizeof(httpd_uri_t); i++) {
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httpd_register_uri_handler(s_hServer, &routes[i]);
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}
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return ESP_OK;
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}
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ESP_LOGE(TAG, "Error starting server!");
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return suc;
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}
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