Fork of the espurna firmware for `mhsw` switches
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/*
WEBSERVER MODULE
Copyright (C) 2016-2018 by Xose Pérez <xose dot perez at gmail dot com>
*/
#if WEB_SUPPORT
#include <ESPAsyncTCP.h>
#include <ESPAsyncWebServer.h>
#include <Hash.h>
#include <FS.h>
#include <AsyncJson.h>
#include <ArduinoJson.h>
#if WEB_EMBEDDED
#include "static/index.html.gz.h"
#endif // WEB_EMBEDDED
#if ASYNC_TCP_SSL_ENABLED & WEB_SSL_ENABLED
#include "static/server.cer.h"
#include "static/server.key.h"
#endif // ASYNC_TCP_SSL_ENABLED & WEB_SSL_ENABLED
// -----------------------------------------------------------------------------
AsyncWebServer * _server;
char _last_modified[50];
std::vector<uint8_t> * _webConfigBuffer;
bool _webConfigSuccess = false;
// -----------------------------------------------------------------------------
// HOOKS
// -----------------------------------------------------------------------------
void _onReset(AsyncWebServerRequest *request) {
deferredReset(100, CUSTOM_RESET_HTTP);
request->send(200);
}
void _onGetConfig(AsyncWebServerRequest *request) {
webLog(request);
if (!webAuthenticate(request)) return request->requestAuthentication(getSetting("hostname").c_str());
AsyncResponseStream *response = request->beginResponseStream("text/json");
DynamicJsonBuffer jsonBuffer;
JsonObject &root = jsonBuffer.createObject();
root["app"] = APP_NAME;
root["version"] = APP_VERSION;
settingsGetJson(root);
root.prettyPrintTo(*response);
char buffer[100];
snprintf_P(buffer, sizeof(buffer), PSTR("attachment; filename=\"%s-backup.json\""), (char *) getSetting("hostname").c_str());
response->addHeader("Content-Disposition", buffer);
request->send(response);
}
void _onPostConfig(AsyncWebServerRequest *request) {
webLog(request);
if (!webAuthenticate(request)) return request->requestAuthentication(getSetting("hostname").c_str());
request->send(_webConfigSuccess ? 200 : 400);
}
void _onPostConfigData(AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool final) {
// No buffer
if (final && (index == 0)) {
DynamicJsonBuffer jsonBuffer;
JsonObject& root = jsonBuffer.parseObject((char *) data);
if (root.success()) _webConfigSuccess = settingsRestoreJson(root);
return;
}
// Buffer start => reset
if (index == 0) if (_webConfigBuffer) delete _webConfigBuffer;
// init buffer if it doesn't exist
if (!_webConfigBuffer) {
_webConfigBuffer = new std::vector<uint8_t>();
_webConfigSuccess = false;
}
// Copy
if (len > 0) {
_webConfigBuffer->reserve(_webConfigBuffer->size() + len);
_webConfigBuffer->insert(_webConfigBuffer->end(), data, data + len);
}
// Ending
if (final) {
_webConfigBuffer->push_back(0);
// Parse JSON
DynamicJsonBuffer jsonBuffer;
JsonObject& root = jsonBuffer.parseObject((char *) _webConfigBuffer->data());
if (root.success()) _webConfigSuccess = settingsRestoreJson(root);
delete _webConfigBuffer;
}
}
#if WEB_EMBEDDED
void _onHome(AsyncWebServerRequest *request) {
webLog(request);
if (!webAuthenticate(request)) return request->requestAuthentication(getSetting("hostname").c_str());
if (request->header("If-Modified-Since").equals(_last_modified)) {
request->send(304);
} else {
#if ASYNC_TCP_SSL_ENABLED
// Chunked response, we calculate the chunks based on free heap (in multiples of 32)
// This is necessary when a TLS connection is open since it sucks too much memory
DEBUG_MSG_P(PSTR("[MAIN] Free heap: %d bytes\n"), getFreeHeap());
size_t max = (getFreeHeap() / 3) & 0xFFE0;
AsyncWebServerResponse *response = request->beginChunkedResponse("text/html", [max](uint8_t *buffer, size_t maxLen, size_t index) -> size_t {
// Get the chunk based on the index and maxLen
size_t len = index_html_gz_len - index;
if (len > maxLen) len = maxLen;
if (len > max) len = max;
if (len > 0) memcpy_P(buffer, index_html_gz + index, len);
DEBUG_MSG_P(PSTR("[WEB] Sending %d%%%% (max chunk size: %4d)\r"), int(100 * index / index_html_gz_len), max);
if (len == 0) DEBUG_MSG_P(PSTR("\n"));
// Return the actual length of the chunk (0 for end of file)
return len;
});
#else
AsyncWebServerResponse *response = request->beginResponse_P(200, "text/html", index_html_gz, index_html_gz_len);
#endif
response->addHeader("Content-Encoding", "gzip");
response->addHeader("Last-Modified", _last_modified);
request->send(response);
}
}
#endif
#if ASYNC_TCP_SSL_ENABLED & WEB_SSL_ENABLED
int _onCertificate(void * arg, const char *filename, uint8_t **buf) {
#if WEB_EMBEDDED
if (strcmp(filename, "server.cer") == 0) {
uint8_t * nbuf = (uint8_t*) malloc(server_cer_len);
memcpy_P(nbuf, server_cer, server_cer_len);
*buf = nbuf;
DEBUG_MSG_P(PSTR("[WEB] SSL File: %s - OK\n"), filename);
return server_cer_len;
}
if (strcmp(filename, "server.key") == 0) {
uint8_t * nbuf = (uint8_t*) malloc(server_key_len);
memcpy_P(nbuf, server_key, server_key_len);
*buf = nbuf;
DEBUG_MSG_P(PSTR("[WEB] SSL File: %s - OK\n"), filename);
return server_key_len;
}
DEBUG_MSG_P(PSTR("[WEB] SSL File: %s - ERROR\n"), filename);
*buf = 0;
return 0;
#else
File file = SPIFFS.open(filename, "r");
if (file) {
size_t size = file.size();
uint8_t * nbuf = (uint8_t*) malloc(size);
if (nbuf) {
size = file.read(nbuf, size);
file.close();
*buf = nbuf;
DEBUG_MSG_P(PSTR("[WEB] SSL File: %s - OK\n"), filename);
return size;
}
file.close();
}
DEBUG_MSG_P(PSTR("[WEB] SSL File: %s - ERROR\n"), filename);
*buf = 0;
return 0;
#endif
}
#endif
void _onUpgrade(AsyncWebServerRequest *request) {
webLog(request);
if (!webAuthenticate(request)) return request->requestAuthentication(getSetting("hostname").c_str());
char buffer[10];
if (!Update.hasError()) {
sprintf_P(buffer, PSTR("OK"));
} else {
sprintf_P(buffer, PSTR("ERROR %d"), Update.getError());
}
AsyncWebServerResponse *response = request->beginResponse(200, "text/plain", buffer);
response->addHeader("Connection", "close");
if (Update.hasError()) {
eepromRotate(true);
} else {
deferredReset(100, CUSTOM_RESET_UPGRADE);
}
request->send(response);
}
void _onUpgradeData(AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool final) {
if (!index) {
// Disabling EEPROM rotation to prevent writing to EEPROM after the upgrade
eepromRotate(false);
DEBUG_MSG_P(PSTR("[UPGRADE] Start: %s\n"), filename.c_str());
Update.runAsync(true);
if (!Update.begin((ESP.getFreeSketchSpace() - 0x1000) & 0xFFFFF000)) {
#ifdef DEBUG_PORT
Update.printError(DEBUG_PORT);
#endif
}
}
if (!Update.hasError()) {
if (Update.write(data, len) != len) {
#ifdef DEBUG_PORT
Update.printError(DEBUG_PORT);
#endif
}
}
if (final) {
if (Update.end(true)){
DEBUG_MSG_P(PSTR("[UPGRADE] Success: %u bytes\n"), index + len);
} else {
#ifdef DEBUG_PORT
Update.printError(DEBUG_PORT);
#endif
}
} else {
DEBUG_MSG_P(PSTR("[UPGRADE] Progress: %u bytes\r"), index + len);
}
}
// -----------------------------------------------------------------------------
bool webAuthenticate(AsyncWebServerRequest *request) {
#if USE_PASSWORD
String password = getSetting("adminPass", ADMIN_PASS);
char httpPassword[password.length() + 1];
password.toCharArray(httpPassword, password.length() + 1);
return request->authenticate(WEB_USERNAME, httpPassword);
#else
return true;
#endif
}
// -----------------------------------------------------------------------------
AsyncWebServer * webServer() {
return _server;
}
unsigned int webPort() {
#if ASYNC_TCP_SSL_ENABLED & WEB_SSL_ENABLED
return 443;
#else
return getSetting("webPort", WEB_PORT).toInt();
#endif
}
void webLog(AsyncWebServerRequest *request) {
DEBUG_MSG_P(PSTR("[WEBSERVER] Request: %s %s\n"), request->methodToString(), request->url().c_str());
}
void webSetup() {
// Cache the Last-Modifier header value
snprintf_P(_last_modified, sizeof(_last_modified), PSTR("%s %s GMT"), __DATE__, __TIME__);
// Create server
unsigned int port = webPort();
_server = new AsyncWebServer(port);
// Rewrites
_server->rewrite("/", "/index.html");
// Serve home (basic authentication protection)
#if WEB_EMBEDDED
_server->on("/index.html", HTTP_GET, _onHome);
#endif
_server->on("/reset", HTTP_GET, _onReset);
_server->on("/config", HTTP_GET, _onGetConfig);
_server->on("/config", HTTP_POST | HTTP_PUT, _onPostConfig, _onPostConfigData);
_server->on("/upgrade", HTTP_POST, _onUpgrade, _onUpgradeData);
// Serve static files
#if SPIFFS_SUPPORT
_server->serveStatic("/", SPIFFS, "/")
.setLastModified(_last_modified)
.setFilter([](AsyncWebServerRequest *request) -> bool {
webLog(request);
return true;
});
#endif
// 404
_server->onNotFound([](AsyncWebServerRequest *request){
request->send(404);
});
// Run server
#if ASYNC_TCP_SSL_ENABLED & WEB_SSL_ENABLED
_server->onSslFileRequest(_onCertificate, NULL);
_server->beginSecure("server.cer", "server.key", NULL);
#else
_server->begin();
#endif
DEBUG_MSG_P(PSTR("[WEBSERVER] Webserver running on port %u\n"), port);
}
#endif // WEB_SUPPORT