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/****************************************************************************************************************************
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AsyncHTTPRequest_Generic.h - Dead simple AsyncHTTPRequest for ESP8266, ESP32 and currently STM32 with built-in LAN8742A Ethernet
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For ESP8266, ESP32 and STM32 with built-in LAN8742A Ethernet (Nucleo-144, DISCOVERY, etc)
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AsyncHTTPRequest_STM32 is a library for the ESP8266, ESP32 and currently STM32 run built-in Ethernet WebServer
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Based on and modified from asyncHTTPrequest Library (https://github.com/boblemaire/asyncHTTPrequest)
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Built by Khoi Hoang https://github.com/khoih-prog/AsyncHTTPRequest_Generic
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Licensed under MIT license
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Copyright (C) <2018> <Bob Lemaire, IoTaWatt, Inc.>
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This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License
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as published bythe Free Software Foundation, either version 3 of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
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Version: 1.4.1
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Version Modified By Date Comments
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------- ----------- ---------- -----------
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1.0.0 K Hoang 14/09/2020 Initial coding to add support to STM32 using built-in Ethernet (Nucleo-144, DISCOVERY, etc).
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1.0.1 K Hoang 09/10/2020 Restore cpp code besides Impl.h code.
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1.0.2 K Hoang 09/11/2020 Make Mutex Lock and delete more reliable and error-proof
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1.1.0 K Hoang 23/12/2020 Add HTTP PUT, PATCH, DELETE and HEAD methods
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1.1.1 K Hoang 24/12/2020 Prevent crash if request and/or method not correct.
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1.1.2 K Hoang 11/02/2021 Rename _lock and _unlock to avoid conflict with AsyncWebServer library
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1.1.3 K Hoang 25/02/2021 Fix non-persistent Connection header bug
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1.1.4 K Hoang 21/03/2021 Fix `library.properties` dependency
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1.1.5 K Hoang 22/03/2021 Fix dependency on STM32AsyncTCP Library
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1.2.0 K Hoang 11/04/2021 Add support to LAN8720 using STM32F4 or STM32F7
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1.3.0 K Hoang 09/07/2021 Add support to WT32_ETH01 (ESP32 + LAN8720) boards
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1.3.1 K Hoang 09/10/2021 Update `platform.ini` and `library.json`
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1.4.0 K Hoang 23/11/2021 Fix crashing bug when request a non-existing IP
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1.4.1 K Hoang 29/11/2021 Auto detect ESP32 core version and improve connection time for WT32_ETH01
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*****************************************************************************************************************************/
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#pragma once
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#ifndef ASYNC_HTTP_REQUEST_GENERIC_H
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#define ASYNC_HTTP_REQUEST_GENERIC_H
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#define ASYNC_HTTP_REQUEST_GENERIC_VERSION "AsyncHTTPRequest_Generic v1.4.1"
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#include <Arduino.h>
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#include "AsyncHTTPRequest_Debug_Generic.h"
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#ifndef DEBUG_IOTA_PORT
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#define DEBUG_IOTA_PORT Serial
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#endif
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#ifdef DEBUG_IOTA_HTTP
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#define DEBUG_IOTA_HTTP_SET true
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#else
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#define DEBUG_IOTA_HTTP_SET false
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#endif
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// KH add
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#define SAFE_DELETE(object) if (object) { delete object;}
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#define SAFE_DELETE_ARRAY(object) if (object) { delete[] object;}
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#if ESP32
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#include <AsyncTCP.h>
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// KH mod
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#define MUTEX_LOCK_NR if (xSemaphoreTakeRecursive(threadLock,portMAX_DELAY) != pdTRUE) { return;}
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#define MUTEX_LOCK(returnVal) if (xSemaphoreTakeRecursive(threadLock,portMAX_DELAY) != pdTRUE) { return returnVal;}
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#define _AHTTP_lock xSemaphoreTakeRecursive(threadLock,portMAX_DELAY)
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#define _AHTTP_unlock xSemaphoreGiveRecursive(threadLock)
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#elif ESP8266
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#include <ESPAsyncTCP.h>
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#define MUTEX_LOCK_NR
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#define MUTEX_LOCK(returnVal)
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#define _AHTTP_lock
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#define _AHTTP_unlock
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#elif ( defined(STM32F0) || defined(STM32F1) || defined(STM32F2) || defined(STM32F3) ||defined(STM32F4) || defined(STM32F7) || \
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defined(STM32L0) || defined(STM32L1) || defined(STM32L4) || defined(STM32H7) ||defined(STM32G0) || defined(STM32G4) || \
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defined(STM32WB) || defined(STM32MP1) )
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#include "STM32AsyncTCP.h"
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#define MUTEX_LOCK_NR
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#define MUTEX_LOCK(returnVal)
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#define _AHTTP_lock
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#define _AHTTP_unlock
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#endif
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#include <pgmspace.h>
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#include <utility/xbuf.h>
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#define DEBUG_HTTP(format,...) if(_debug){\
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DEBUG_IOTA_PORT.printf("Debug(%3ld): ", millis()-_requestStartTime);\
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DEBUG_IOTA_PORT.printf_P(PSTR(format),##__VA_ARGS__);}
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#define DEFAULT_RX_TIMEOUT 3 // Seconds for timeout
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#define HTTPCODE_CONNECTION_REFUSED (-1)
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#define HTTPCODE_SEND_HEADER_FAILED (-2)
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#define HTTPCODE_SEND_PAYLOAD_FAILED (-3)
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#define HTTPCODE_NOT_CONNECTED (-4)
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#define HTTPCODE_CONNECTION_LOST (-5)
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#define HTTPCODE_NO_STREAM (-6)
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#define HTTPCODE_NO_HTTP_SERVER (-7)
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#define HTTPCODE_TOO_LESS_RAM (-8)
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#define HTTPCODE_ENCODING (-9)
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#define HTTPCODE_STREAM_WRITE (-10)
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#define HTTPCODE_TIMEOUT (-11)
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typedef enum
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{
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readyStateUnsent = 0, // Client created, open not yet called
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readyStateOpened = 1, // open() has been called, connected
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readyStateHdrsRecvd = 2, // send() called, response headers available
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readyStateLoading = 3, // receiving, partial data available
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readyStateDone = 4 // Request complete, all data available.
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} reqStates;
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class AsyncHTTPRequest
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{
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struct header
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{
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header* next;
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char* name;
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char* value;
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header(): next(nullptr), name(nullptr), value(nullptr)
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{};
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~header()
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{
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SAFE_DELETE_ARRAY(name)
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SAFE_DELETE_ARRAY(value)
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SAFE_DELETE(next)
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//delete[] name;
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//delete[] value;
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//delete next;
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}
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};
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struct URL
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{
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char* scheme;
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char* user;
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char* pwd;
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char* host;
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int port;
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char* path;
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char* query;
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char* fragment;
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URL(): scheme(nullptr), user(nullptr), pwd(nullptr), host(nullptr),
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port(80), path(nullptr), query(nullptr), fragment(nullptr)
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{};
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~URL()
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{
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SAFE_DELETE_ARRAY(scheme)
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SAFE_DELETE_ARRAY(user)
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SAFE_DELETE_ARRAY(pwd)
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SAFE_DELETE_ARRAY(host)
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SAFE_DELETE_ARRAY(path)
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SAFE_DELETE_ARRAY(query)
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SAFE_DELETE_ARRAY(fragment)
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}
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};
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typedef std::function<void(void*, AsyncHTTPRequest*, int readyState)> readyStateChangeCB;
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typedef std::function<void(void*, AsyncHTTPRequest*, size_t available)> onDataCB;
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public:
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AsyncHTTPRequest();
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~AsyncHTTPRequest();
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//External functions in typical order of use:
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//__________________________________________________________________________________________________________*/
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void setDebug(bool); // Turn debug message on/off
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bool debug(); // is debug on or off?
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bool open(const char* /*GET/POST*/, const char* URL); // Initiate a request
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void onReadyStateChange(readyStateChangeCB, void* arg = 0); // Optional event handler for ready state change
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// or you can simply poll readyState()
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void setTimeout(int); // overide default timeout (seconds)
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void setReqHeader(const char* name, const char* value); // add a request header
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void setReqHeader(const char* name, int32_t value); // overload to use integer value
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#if (ESP32 || ESP8266)
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void setReqHeader(const char* name, const __FlashStringHelper* value);
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void setReqHeader(const __FlashStringHelper *name, const char* value);
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void setReqHeader(const __FlashStringHelper *name, const __FlashStringHelper* value);
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void setReqHeader(const __FlashStringHelper *name, int32_t value);
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#endif
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bool send(); // Send the request (GET)
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bool send(String body); // Send the request (POST)
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bool send(const char* body); // Send the request (POST)
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bool send(const uint8_t* buffer, size_t len); // Send the request (POST) (binary data?)
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bool send(xbuf* body, size_t len); // Send the request (POST) data in an xbuf
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void abort(); // Abort the current operation
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reqStates readyState(); // Return the ready state
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int respHeaderCount(); // Retrieve count of response headers
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char* respHeaderName(int index); // Return header name by index
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char* respHeaderValue(int index); // Return header value by index
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char* respHeaderValue(const char* name); // Return header value by name
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bool respHeaderExists(const char* name); // Does header exist by name?
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#if (ESP32 || ESP8266)
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char* respHeaderValue(const __FlashStringHelper *name);
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bool respHeaderExists(const __FlashStringHelper *name);
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#endif
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String headers(); // Return all headers as String
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void onData(onDataCB, void* arg = 0); // Notify when min data is available
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size_t available(); // response available
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size_t responseLength(); // indicated response length or sum of chunks to date
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int responseHTTPcode(); // HTTP response code or (negative) error code
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String responseText(); // response (whole* or partial* as string)
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char* responseLongText(); // response long (whole* or partial* as string)
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size_t responseRead(uint8_t* buffer, size_t len); // Read response into buffer
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uint32_t elapsedTime(); // Elapsed time of in progress transaction or last completed (ms)
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String version(); // Version of AsyncHTTPRequest
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//___________________________________________________________________________________________________________________________________
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private:
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// New in v1.1.1
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bool _requestReadyToSend;
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//////
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// New in v1.1.0
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typedef enum { HTTPmethodGET, HTTPmethodPOST, HTTPmethodPUT, HTTPmethodPATCH, HTTPmethodDELETE, HTTPmethodHEAD, HTTPmethodMAX } HTTPmethod;
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HTTPmethod _HTTPmethod;
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const char* _HTTPmethodStringwithSpace[HTTPmethodMAX] = {"GET ", "POST ", "PUT ", "PATCH ", "DELETE ", "HEAD "};
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//////
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reqStates _readyState;
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int16_t _HTTPcode; // HTTP response code or (negative) exception code
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bool _chunked; // Processing chunked response
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bool _debug; // Debug state
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uint32_t _timeout; // Default or user overide RxTimeout in seconds
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uint32_t _lastActivity; // Time of last activity
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uint32_t _requestStartTime; // Time last open() issued
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uint32_t _requestEndTime; // Time of last disconnect
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URL* _URL; // -> URL data structure
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char* _connectedHost; // Host when connected
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int _connectedPort; // Port when connected
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AsyncClient* _client; // ESPAsyncTCP AsyncClient instance
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size_t _contentLength; // content-length header value or sum of chunk headers
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size_t _contentRead; // number of bytes retrieved by user since last open()
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readyStateChangeCB _readyStateChangeCB; // optional callback for readyState change
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void* _readyStateChangeCBarg; // associated user argument
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onDataCB _onDataCB; // optional callback when data received
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void* _onDataCBarg; // associated user argument
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#ifdef ESP32
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SemaphoreHandle_t threadLock;
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#endif
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// request and response String buffers and header list (same queue for request and response).
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xbuf* _request; // Tx data buffer
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xbuf* _response; // Rx data buffer for headers
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xbuf* _chunks; // First stage for chunked response
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header* _headers; // request or (readyState > readyStateHdrsRcvd) response headers
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// Protected functions
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header* _addHeader(const char*, const char*);
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header* _getHeader(const char*);
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header* _getHeader(int);
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bool _buildRequest();
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bool _parseURL(const char*);
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bool _parseURL(String);
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void _processChunks();
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bool _connect();
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size_t _send();
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void _setReadyState(reqStates);
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#if (ESP32 || ESP8266)
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char* _charstar(const __FlashStringHelper *str);
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#endif
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// callbacks
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void _onConnect(AsyncClient*);
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void _onDisconnect(AsyncClient*);
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void _onData(void*, size_t);
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void _onError(AsyncClient*, int8_t);
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void _onPoll(AsyncClient*);
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bool _collectHeaders();
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};
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#endif // ASYNC_HTTP_REQUEST_GENERIC_H
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