* OTA update for ESP32 targets

arch/esp32/AsyncElegantOTA/LICENSE

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+MIT License
+
+Copyright (c) 2019 Ayush Sharma
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

arch/esp32/AsyncElegantOTA/keywords.txt

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+AsyncElegantOTA	KEYWORD1
+begin	KEYWORD2

arch/esp32/AsyncElegantOTA/library.properties

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+name=AsyncElegantOTA
+version=2.2.8
+author=Ayush Sharma
+category=Communication
+maintainer=Ayush Sharma <asrocks5@gmail.com>
+sentence=Perform OTAs for ESP8266 & ESP32 Asynchronously.
+paragraph=A User Interface Library which provides interactive elements for your Over the Air Updates on ESP8266/ESP32.
+url=https://github.com/ayushsharma82/AsyncElegantOTA
+architectures=esp8266,esp32

arch/esp32/AsyncElegantOTA/src/AsyncElegantOTA.cpp

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+#include <AsyncElegantOTA.h>
+
+AsyncElegantOtaClass AsyncElegantOTA;
+
+void AsyncElegantOtaClass::setID(const char* id){
+    _id = id;
+}
+
+void AsyncElegantOtaClass::begin(AsyncWebServer *server, const char* username, const char* password){
+    _server = server;
+
+    if(strlen(username) > 0){
+        _authRequired = true;
+        _username = username;
+        _password = password;
+    }else{
+        _authRequired = false;
+        _username = "";
+        _password = "";
+    }
+
+    _server->on("/update/identity", HTTP_GET, [&](AsyncWebServerRequest *request){
+        if(_authRequired){
+            if(!request->authenticate(_username.c_str(), _password.c_str())){
+                return request->requestAuthentication();
+            }
+        }
+        #if defined(ESP8266)
+            request->send(200, "application/json", "{\"id\": \""+_id+"\", \"hardware\": \"ESP8266\"}");
+        #elif defined(ESP32)
+            request->send(200, "application/json", "{\"id\": \""+_id+"\", \"hardware\": \"ESP32\"}");
+        #endif
+    });
+
+    _server->on("/update", HTTP_GET, [&](AsyncWebServerRequest *request){
+        if(_authRequired){
+            if(!request->authenticate(_username.c_str(), _password.c_str())){
+                return request->requestAuthentication();
+            }
+        }
+        AsyncWebServerResponse *response = request->beginResponse_P(200, "text/html", ELEGANT_HTML, ELEGANT_HTML_SIZE);
+        response->addHeader("Content-Encoding", "gzip");
+        request->send(response);
+    });
+
+    _server->on("/update", HTTP_POST, [&](AsyncWebServerRequest *request) {
+        if(_authRequired){
+            if(!request->authenticate(_username.c_str(), _password.c_str())){
+                return request->requestAuthentication();
+            }
+        }
+        // the request handler is triggered after the upload has finished... 
+        // create the response, add header, and send response
+        AsyncWebServerResponse *response = request->beginResponse((Update.hasError())?500:200, "text/plain", (Update.hasError())?"FAIL":"OK");
+        response->addHeader("Connection", "close");
+        response->addHeader("Access-Control-Allow-Origin", "*");
+        request->send(response);
+        restart();
+    }, [&](AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool final) {
+        //Upload handler chunks in data
+        if(_authRequired){
+            if(!request->authenticate(_username.c_str(), _password.c_str())){
+                return request->requestAuthentication();
+            }
+        }
+
+        if (!index) {
+            if(!request->hasParam("MD5", true)) {
+                return request->send(400, "text/plain", "MD5 parameter missing");
+            }
+
+            if(!Update.setMD5(request->getParam("MD5", true)->value().c_str())) {
+                return request->send(400, "text/plain", "MD5 parameter invalid");
+            }
+
+            #if defined(ESP8266)
+                int cmd = (filename == "filesystem") ? U_FS : U_FLASH;
+                Update.runAsync(true);
+                size_t fsSize = ((size_t) &_FS_end - (size_t) &_FS_start);
+                uint32_t maxSketchSpace = (ESP.getFreeSketchSpace() - 0x1000) & 0xFFFFF000;
+                if (!Update.begin((cmd == U_FS)?fsSize:maxSketchSpace, cmd)){ // Start with max available size
+            #elif defined(ESP32)
+                int cmd = (filename == "filesystem") ? U_SPIFFS : U_FLASH;
+                if (!Update.begin(UPDATE_SIZE_UNKNOWN, cmd)) { // Start with max available size
+            #endif
+                Update.printError(Serial);
+                return request->send(400, "text/plain", "OTA could not begin");
+            }
+        }
+
+        // Write chunked data to the free sketch space
+        if(len){
+            if (Update.write(data, len) != len) {
+                return request->send(400, "text/plain", "OTA could not begin");
+            }
+        }
+            
+        if (final) { // if the final flag is set then this is the last frame of data
+            if (!Update.end(true)) { //true to set the size to the current progress
+                Update.printError(Serial);
+                return request->send(400, "text/plain", "Could not end OTA");
+            }
+        }else{
+            return;
+        }
+    });
+}
+
+// deprecated, keeping for backward compatibility
+void AsyncElegantOtaClass::loop() {
+}
+
+void AsyncElegantOtaClass::restart() {
+    yield();
+    delay(1000);
+    yield();
+    ESP.restart();
+}
+
+String AsyncElegantOtaClass::getID(){
+    String id = "";
+    #if defined(ESP8266)
+        id = String(ESP.getChipId());
+    #elif defined(ESP32)
+        id = String((uint32_t)ESP.getEfuseMac(), HEX);
+    #endif
+    id.toUpperCase();
+    return id;
+}

arch/esp32/AsyncElegantOTA/src/AsyncElegantOTA.h

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+#ifndef AsyncElegantOTA_h
+#define AsyncElegantOTA_h
+
+#warning AsyncElegantOTA library is deprecated, Please consider moving to newer ElegantOTA library which now comes with an Async Mode. Learn More: https://docs.elegantota.pro/async-mode/ 
+
+#include "Arduino.h"
+#include "stdlib_noniso.h"
+
+#if defined(ESP8266)
+    #include "ESP8266WiFi.h"
+    #include "ESPAsyncTCP.h"
+    #include "flash_hal.h"
+    #include "FS.h"
+#elif defined(ESP32)
+    #include "WiFi.h"
+    #include "AsyncTCP.h"
+    #include "Update.h"
+    #include "esp_int_wdt.h"
+    #include "esp_task_wdt.h"
+#endif
+
+#include "Hash.h"
+#include "ESPAsyncWebServer.h"
+#include "FS.h"
+
+#include "elegantWebpage.h"
+
+
+class AsyncElegantOtaClass{
+
+    public:
+        void
+            setID(const char* id),
+            begin(AsyncWebServer *server, const char* username = "", const char* password = ""),
+            loop(),
+            restart();
+
+    private:
+        AsyncWebServer *_server;
+
+        String getID();
+
+        String _id = getID();
+        String _username = "";
+        String _password = "";
+        bool _authRequired = false;
+
+};
+
+extern AsyncElegantOtaClass AsyncElegantOTA;
+
+#endif

arch/esp32/AsyncElegantOTA/src/Hash.h

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+/**
+ * @file Hash.h
+ * @date 20.05.2015
+ * @author Markus Sattler
+ *
+ * Copyright (c) 2015 Markus Sattler. All rights reserved.
+ * This file is part of the esp8266 core for Arduino environment.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifndef HASH_H_
+#define HASH_H_
+
+//#define DEBUG_SHA1
+
+void sha1(const uint8_t* data, uint32_t size, uint8_t hash[20]);
+void sha1(const char* data, uint32_t size, uint8_t hash[20]);
+void sha1(const String& data, uint8_t hash[20]);
+
+String sha1(const uint8_t* data, uint32_t size);
+String sha1(const char* data, uint32_t size);
+String sha1(const String& data);
+
+#endif /* HASH_H_ */