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512 lines
15 KiB
512 lines
15 KiB
/*
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WEBSERVER MODULE
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Copyright (C) 2016-2019 by Xose Pérez <xose dot perez at gmail dot com>
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*/
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#if WEB_SUPPORT
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#include "system.h"
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#include "utils.h"
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#include <ESPAsyncTCP.h>
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#include <ESPAsyncWebServer.h>
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#include <Hash.h>
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#include <FS.h>
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#include <AsyncJson.h>
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#include <ArduinoJson.h>
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#if WEB_EMBEDDED
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#if WEBUI_IMAGE == WEBUI_IMAGE_SMALL
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#include "static/index.small.html.gz.h"
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#elif WEBUI_IMAGE == WEBUI_IMAGE_LIGHT
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#include "static/index.light.html.gz.h"
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#elif WEBUI_IMAGE == WEBUI_IMAGE_SENSOR
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#include "static/index.sensor.html.gz.h"
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#elif WEBUI_IMAGE == WEBUI_IMAGE_RFBRIDGE
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#include "static/index.rfbridge.html.gz.h"
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#elif WEBUI_IMAGE == WEBUI_IMAGE_RFM69
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#include "static/index.rfm69.html.gz.h"
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#elif WEBUI_IMAGE == WEBUI_IMAGE_LIGHTFOX
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#include "static/index.lightfox.html.gz.h"
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#elif WEBUI_IMAGE == WEBUI_IMAGE_THERMOSTAT
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#include "static/index.thermostat.html.gz.h"
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#elif WEBUI_IMAGE == WEBUI_IMAGE_FULL
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#include "static/index.all.html.gz.h"
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#endif
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#endif // WEB_EMBEDDED
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#if WEB_SSL_ENABLED
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#include "static/server.cer.h"
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#include "static/server.key.h"
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#endif // WEB_SSL_ENABLED
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// -----------------------------------------------------------------------------
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AsyncWebServer * _server;
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char _last_modified[50];
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std::vector<uint8_t> * _webConfigBuffer;
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bool _webConfigSuccess = false;
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std::vector<web_request_callback_f> _web_request_callbacks;
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std::vector<web_body_callback_f> _web_body_callbacks;
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constexpr const size_t WEB_CONFIG_BUFFER_MAX = 4096;
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// -----------------------------------------------------------------------------
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// HOOKS
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// -----------------------------------------------------------------------------
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void _onReset(AsyncWebServerRequest *request) {
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webLog(request);
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if (!webAuthenticate(request)) {
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return request->requestAuthentication(getSetting("hostname").c_str());
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}
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deferredReset(100, CUSTOM_RESET_HTTP);
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request->send(200);
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}
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void _onDiscover(AsyncWebServerRequest *request) {
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webLog(request);
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AsyncResponseStream *response = request->beginResponseStream("application/json");
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const String device = getBoardName();
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const String hostname = getSetting("hostname");
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StaticJsonBuffer<JSON_OBJECT_SIZE(4)> jsonBuffer;
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JsonObject &root = jsonBuffer.createObject();
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root["app"] = APP_NAME;
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root["version"] = APP_VERSION;
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root["device"] = device.c_str();
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root["hostname"] = hostname.c_str();
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root.printTo(*response);
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request->send(response);
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}
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void _onGetConfig(AsyncWebServerRequest *request) {
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webLog(request);
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if (!webAuthenticate(request)) {
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return request->requestAuthentication(getSetting("hostname").c_str());
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}
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AsyncResponseStream *response = request->beginResponseStream("text/json");
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char buffer[100];
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snprintf_P(buffer, sizeof(buffer), PSTR("attachment; filename=\"%s-backup.json\""), (char *) getSetting("hostname").c_str());
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response->addHeader("Content-Disposition", buffer);
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response->addHeader("X-XSS-Protection", "1; mode=block");
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response->addHeader("X-Content-Type-Options", "nosniff");
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response->addHeader("X-Frame-Options", "deny");
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response->printf("{\n\"app\": \"%s\"", APP_NAME);
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response->printf(",\n\"version\": \"%s\"", APP_VERSION);
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response->printf(",\n\"backup\": \"1\"");
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#if NTP_SUPPORT
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response->printf(",\n\"timestamp\": \"%s\"", ntpDateTime().c_str());
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#endif
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// Write the keys line by line (not sorted)
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unsigned long count = settingsKeyCount();
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for (unsigned int i=0; i<count; i++) {
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String key = settingsKeyName(i);
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String value = getSetting(key);
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response->printf(",\n\"%s\": \"%s\"", key.c_str(), value.c_str());
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}
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response->printf("\n}");
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request->send(response);
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}
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void _onPostConfig(AsyncWebServerRequest *request) {
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webLog(request);
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if (!webAuthenticate(request)) {
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return request->requestAuthentication(getSetting("hostname").c_str());
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}
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request->send(_webConfigSuccess ? 200 : 400);
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}
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void _onPostConfigData(AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool final) {
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if (!webAuthenticate(request)) {
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return request->requestAuthentication(getSetting("hostname").c_str());
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}
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// No buffer
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if (final && (index == 0)) {
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_webConfigSuccess = settingsRestoreJson((char*) data);
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return;
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}
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// Buffer start => reset
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if (index == 0) if (_webConfigBuffer) delete _webConfigBuffer;
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// init buffer if it doesn't exist
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if (!_webConfigBuffer) {
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_webConfigBuffer = new std::vector<uint8_t>();
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_webConfigSuccess = false;
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}
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// Copy
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if (len > 0) {
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if ((_webConfigBuffer->size() + len) > std::min(WEB_CONFIG_BUFFER_MAX, getFreeHeap() - sizeof(std::vector<uint8_t>))) {
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delete _webConfigBuffer;
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_webConfigBuffer = nullptr;
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request->send(500);
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return;
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}
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_webConfigBuffer->reserve(_webConfigBuffer->size() + len);
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_webConfigBuffer->insert(_webConfigBuffer->end(), data, data + len);
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}
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// Ending
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if (final) {
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_webConfigBuffer->push_back(0);
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_webConfigSuccess = settingsRestoreJson((char*) _webConfigBuffer->data());
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delete _webConfigBuffer;
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}
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}
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#if WEB_EMBEDDED
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void _onHome(AsyncWebServerRequest *request) {
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webLog(request);
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if (!webAuthenticate(request)) {
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return request->requestAuthentication(getSetting("hostname").c_str());
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}
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if (request->header("If-Modified-Since").equals(_last_modified)) {
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request->send(304);
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} else {
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#if WEB_SSL_ENABLED
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// Chunked response, we calculate the chunks based on free heap (in multiples of 32)
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// This is necessary when a TLS connection is open since it sucks too much memory
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DEBUG_MSG_P(PSTR("[MAIN] Free heap: %d bytes\n"), getFreeHeap());
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size_t max = (getFreeHeap() / 3) & 0xFFE0;
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AsyncWebServerResponse *response = request->beginChunkedResponse("text/html", [max](uint8_t *buffer, size_t maxLen, size_t index) -> size_t {
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// Get the chunk based on the index and maxLen
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size_t len = webui_image_len - index;
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if (len > maxLen) len = maxLen;
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if (len > max) len = max;
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if (len > 0) memcpy_P(buffer, webui_image + index, len);
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DEBUG_MSG_P(PSTR("[WEB] Sending %d%%%% (max chunk size: %4d)\r"), int(100 * index / webui_image_len), max);
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if (len == 0) DEBUG_MSG_P(PSTR("\n"));
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// Return the actual length of the chunk (0 for end of file)
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return len;
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});
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#else
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AsyncWebServerResponse *response = request->beginResponse_P(200, "text/html", webui_image, webui_image_len);
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#endif
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response->addHeader("Content-Encoding", "gzip");
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response->addHeader("Last-Modified", _last_modified);
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response->addHeader("X-XSS-Protection", "1; mode=block");
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response->addHeader("X-Content-Type-Options", "nosniff");
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response->addHeader("X-Frame-Options", "deny");
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request->send(response);
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}
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}
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#endif
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#if WEB_SSL_ENABLED
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int _onCertificate(void * arg, const char *filename, uint8_t **buf) {
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#if WEB_EMBEDDED
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if (strcmp(filename, "server.cer") == 0) {
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uint8_t * nbuf = (uint8_t*) malloc(server_cer_len);
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memcpy_P(nbuf, server_cer, server_cer_len);
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*buf = nbuf;
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DEBUG_MSG_P(PSTR("[WEB] SSL File: %s - OK\n"), filename);
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return server_cer_len;
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}
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if (strcmp(filename, "server.key") == 0) {
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uint8_t * nbuf = (uint8_t*) malloc(server_key_len);
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memcpy_P(nbuf, server_key, server_key_len);
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*buf = nbuf;
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DEBUG_MSG_P(PSTR("[WEB] SSL File: %s - OK\n"), filename);
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return server_key_len;
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}
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DEBUG_MSG_P(PSTR("[WEB] SSL File: %s - ERROR\n"), filename);
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*buf = 0;
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return 0;
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#else
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File file = SPIFFS.open(filename, "r");
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if (file) {
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size_t size = file.size();
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uint8_t * nbuf = (uint8_t*) malloc(size);
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if (nbuf) {
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size = file.read(nbuf, size);
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file.close();
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*buf = nbuf;
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DEBUG_MSG_P(PSTR("[WEB] SSL File: %s - OK\n"), filename);
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return size;
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}
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file.close();
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}
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DEBUG_MSG_P(PSTR("[WEB] SSL File: %s - ERROR\n"), filename);
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*buf = 0;
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return 0;
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#endif
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}
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#endif
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void _onUpgrade(AsyncWebServerRequest *request) {
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webLog(request);
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if (!webAuthenticate(request)) {
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return request->requestAuthentication(getSetting("hostname").c_str());
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}
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char buffer[10];
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if (!Update.hasError()) {
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sprintf_P(buffer, PSTR("OK"));
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} else {
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sprintf_P(buffer, PSTR("ERROR %d"), Update.getError());
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}
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AsyncWebServerResponse *response = request->beginResponse(200, "text/plain", buffer);
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response->addHeader("Connection", "close");
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response->addHeader("X-XSS-Protection", "1; mode=block");
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response->addHeader("X-Content-Type-Options", "nosniff");
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response->addHeader("X-Frame-Options", "deny");
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if (Update.hasError()) {
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eepromRotate(true);
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} else {
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deferredReset(100, CUSTOM_RESET_UPGRADE);
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}
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request->send(response);
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}
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void _onUpgradeFile(AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool final) {
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if (!webAuthenticate(request)) {
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return request->requestAuthentication(getSetting("hostname").c_str());
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}
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if (!index) {
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// Disabling EEPROM rotation to prevent writing to EEPROM after the upgrade
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eepromRotate(false);
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DEBUG_MSG_P(PSTR("[UPGRADE] Start: %s\n"), filename.c_str());
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Update.runAsync(true);
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if (!Update.begin((ESP.getFreeSketchSpace() - 0x1000) & 0xFFFFF000)) {
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#ifdef DEBUG_PORT
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Update.printError(DEBUG_PORT);
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#endif
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}
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}
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if (!Update.hasError()) {
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if (Update.write(data, len) != len) {
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#ifdef DEBUG_PORT
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Update.printError(DEBUG_PORT);
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#endif
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}
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}
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if (final) {
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if (Update.end(true)){
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DEBUG_MSG_P(PSTR("[UPGRADE] Success: %u bytes\n"), index + len);
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} else {
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#ifdef DEBUG_PORT
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Update.printError(DEBUG_PORT);
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#endif
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}
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} else {
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// Removed to avoid websocket ping back during upgrade (see #1574)
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// TODO: implement as separate from debugging message
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if (wsConnected()) return;
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DEBUG_MSG_P(PSTR("[UPGRADE] Progress: %u bytes\r"), index + len);
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}
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}
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bool _onAPModeRequest(AsyncWebServerRequest *request) {
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if ((WiFi.getMode() & WIFI_AP) > 0) {
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const String domain = getSetting("hostname") + ".";
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const String host = request->header("Host");
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const String ip = WiFi.softAPIP().toString();
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// Only allow requests that use our hostname or ip
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if (host.equals(ip)) return true;
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if (host.startsWith(domain)) return true;
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// Immediatly close the connection, ref: https://github.com/xoseperez/espurna/issues/1660
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// Not doing so will cause memory exhaustion, because the connection will linger
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request->send(404);
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request->client()->close();
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return false;
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}
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return true;
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}
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void _onRequest(AsyncWebServerRequest *request){
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if (!_onAPModeRequest(request)) return;
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// Send request to subscribers
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for (unsigned char i = 0; i < _web_request_callbacks.size(); i++) {
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bool response = (_web_request_callbacks[i])(request);
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if (response) return;
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}
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// No subscriber handled the request, return a 404 with implicit "Connection: close"
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request->send(404);
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// And immediatly close the connection, ref: https://github.com/xoseperez/espurna/issues/1660
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// Not doing so will cause memory exhaustion, because the connection will linger
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request->client()->close();
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}
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void _onBody(AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total) {
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if (!_onAPModeRequest(request)) return;
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// Send request to subscribers
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for (unsigned char i = 0; i < _web_body_callbacks.size(); i++) {
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bool response = (_web_body_callbacks[i])(request, data, len, index, total);
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if (response) return;
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}
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// Same as _onAPModeRequest(...)
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request->send(404);
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request->client()->close();
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}
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// -----------------------------------------------------------------------------
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bool webAuthenticate(AsyncWebServerRequest *request) {
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#if USE_PASSWORD
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String password = getAdminPass();
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char httpPassword[password.length() + 1];
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password.toCharArray(httpPassword, password.length() + 1);
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return request->authenticate(WEB_USERNAME, httpPassword);
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#else
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return true;
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#endif
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}
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// -----------------------------------------------------------------------------
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AsyncWebServer * webServer() {
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return _server;
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}
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void webBodyRegister(web_body_callback_f callback) {
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_web_body_callbacks.push_back(callback);
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}
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void webRequestRegister(web_request_callback_f callback) {
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_web_request_callbacks.push_back(callback);
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}
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unsigned int webPort() {
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#if WEB_SSL_ENABLED
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return 443;
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#else
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return getSetting("webPort", WEB_PORT).toInt();
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#endif
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}
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void webLog(AsyncWebServerRequest *request) {
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DEBUG_MSG_P(PSTR("[WEBSERVER] Request: %s %s\n"), request->methodToString(), request->url().c_str());
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}
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void webSetup() {
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// Cache the Last-Modifier header value
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snprintf_P(_last_modified, sizeof(_last_modified), PSTR("%s %s GMT"), __DATE__, __TIME__);
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// Create server
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unsigned int port = webPort();
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_server = new AsyncWebServer(port);
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// Rewrites
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_server->rewrite("/", "/index.html");
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// Serve home (basic authentication protection)
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#if WEB_EMBEDDED
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_server->on("/index.html", HTTP_GET, _onHome);
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#endif
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// Other entry points
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_server->on("/reset", HTTP_GET, _onReset);
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_server->on("/config", HTTP_GET, _onGetConfig);
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_server->on("/config", HTTP_POST | HTTP_PUT, _onPostConfig, _onPostConfigData);
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_server->on("/upgrade", HTTP_POST, _onUpgrade, _onUpgradeFile);
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_server->on("/discover", HTTP_GET, _onDiscover);
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// Serve static files
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#if SPIFFS_SUPPORT
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_server->serveStatic("/", SPIFFS, "/")
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.setLastModified(_last_modified)
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.setFilter([](AsyncWebServerRequest *request) -> bool {
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webLog(request);
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return true;
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});
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#endif
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// Handle other requests, including 404
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_server->onRequestBody(_onBody);
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_server->onNotFound(_onRequest);
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// Run server
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#if WEB_SSL_ENABLED
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_server->onSslFileRequest(_onCertificate, NULL);
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_server->beginSecure("server.cer", "server.key", NULL);
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#else
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_server->begin();
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#endif
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DEBUG_MSG_P(PSTR("[WEBSERVER] Webserver running on port %u\n"), port);
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}
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#endif // WEB_SUPPORT
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