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/**
* ESP8266HTTPClient.h
*
* Created on: 02.11.2015
*
* Copyright (c) 2015 Markus Sattler. All rights reserved.
* This file is part of the ESP8266HTTPClient for Arduino.
*
* 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
*
* Modified by Jeroen Döll, June 2018
*/
#ifndef ESP8266HTTPClient_H_
#define ESP8266HTTPClient_H_
#include <memory>
#include <Arduino.h>
#include <StreamString.h>
#include <WiFiClient.h>
#ifdef DEBUG_ESP_HTTP_CLIENT
#ifdef DEBUG_ESP_PORT
#define DEBUG_HTTPCLIENT(fmt, ...) DEBUG_ESP_PORT.printf_P( (PGM_P)PSTR(fmt), ## __VA_ARGS__ )
#endif
#endif
#ifndef DEBUG_HTTPCLIENT
#define DEBUG_HTTPCLIENT(...) do { (void)0; } while (0)
#endif
#define HTTPCLIENT_DEFAULT_TCP_TIMEOUT (5000)
/// HTTP client errors
#define HTTPC_ERROR_CONNECTION_FAILED (-1)
#define HTTPC_ERROR_SEND_HEADER_FAILED (-2)
#define HTTPC_ERROR_SEND_PAYLOAD_FAILED (-3)
#define HTTPC_ERROR_NOT_CONNECTED (-4)
#define HTTPC_ERROR_CONNECTION_LOST (-5)
#define HTTPC_ERROR_NO_STREAM (-6)
#define HTTPC_ERROR_NO_HTTP_SERVER (-7)
#define HTTPC_ERROR_TOO_LESS_RAM (-8)
#define HTTPC_ERROR_ENCODING (-9)
#define HTTPC_ERROR_STREAM_WRITE (-10)
#define HTTPC_ERROR_READ_TIMEOUT (-11)
constexpr int HTTPC_ERROR_CONNECTION_REFUSED __attribute__((deprecated)) = HTTPC_ERROR_CONNECTION_FAILED;
/// size for the stream handling
#define HTTP_TCP_BUFFER_SIZE (1460)
/// HTTP codes see RFC7231
typedef enum {
HTTP_CODE_CONTINUE = 100,
HTTP_CODE_SWITCHING_PROTOCOLS = 101,
HTTP_CODE_PROCESSING = 102,
HTTP_CODE_OK = 200,
HTTP_CODE_CREATED = 201,
HTTP_CODE_ACCEPTED = 202,
HTTP_CODE_NON_AUTHORITATIVE_INFORMATION = 203,
HTTP_CODE_NO_CONTENT = 204,
HTTP_CODE_RESET_CONTENT = 205,
HTTP_CODE_PARTIAL_CONTENT = 206,
HTTP_CODE_MULTI_STATUS = 207,
HTTP_CODE_ALREADY_REPORTED = 208,
HTTP_CODE_IM_USED = 226,
HTTP_CODE_MULTIPLE_CHOICES = 300,
HTTP_CODE_MOVED_PERMANENTLY = 301,
HTTP_CODE_FOUND = 302,
HTTP_CODE_SEE_OTHER = 303,
HTTP_CODE_NOT_MODIFIED = 304,
HTTP_CODE_USE_PROXY = 305,
HTTP_CODE_TEMPORARY_REDIRECT = 307,
HTTP_CODE_PERMANENT_REDIRECT = 308,
HTTP_CODE_BAD_REQUEST = 400,
HTTP_CODE_UNAUTHORIZED = 401,
HTTP_CODE_PAYMENT_REQUIRED = 402,
HTTP_CODE_FORBIDDEN = 403,
HTTP_CODE_NOT_FOUND = 404,
HTTP_CODE_METHOD_NOT_ALLOWED = 405,
HTTP_CODE_NOT_ACCEPTABLE = 406,
HTTP_CODE_PROXY_AUTHENTICATION_REQUIRED = 407,
HTTP_CODE_REQUEST_TIMEOUT = 408,
HTTP_CODE_CONFLICT = 409,
HTTP_CODE_GONE = 410,
HTTP_CODE_LENGTH_REQUIRED = 411,
HTTP_CODE_PRECONDITION_FAILED = 412,
HTTP_CODE_PAYLOAD_TOO_LARGE = 413,
HTTP_CODE_URI_TOO_LONG = 414,
HTTP_CODE_UNSUPPORTED_MEDIA_TYPE = 415,
HTTP_CODE_RANGE_NOT_SATISFIABLE = 416,
HTTP_CODE_EXPECTATION_FAILED = 417,
HTTP_CODE_MISDIRECTED_REQUEST = 421,
HTTP_CODE_UNPROCESSABLE_ENTITY = 422,
HTTP_CODE_LOCKED = 423,
HTTP_CODE_FAILED_DEPENDENCY = 424,
HTTP_CODE_UPGRADE_REQUIRED = 426,
HTTP_CODE_PRECONDITION_REQUIRED = 428,
HTTP_CODE_TOO_MANY_REQUESTS = 429,
HTTP_CODE_REQUEST_HEADER_FIELDS_TOO_LARGE = 431,
HTTP_CODE_INTERNAL_SERVER_ERROR = 500,
HTTP_CODE_NOT_IMPLEMENTED = 501,
HTTP_CODE_BAD_GATEWAY = 502,
HTTP_CODE_SERVICE_UNAVAILABLE = 503,
HTTP_CODE_GATEWAY_TIMEOUT = 504,
HTTP_CODE_HTTP_VERSION_NOT_SUPPORTED = 505,
HTTP_CODE_VARIANT_ALSO_NEGOTIATES = 506,
HTTP_CODE_INSUFFICIENT_STORAGE = 507,
HTTP_CODE_LOOP_DETECTED = 508,
HTTP_CODE_NOT_EXTENDED = 510,
HTTP_CODE_NETWORK_AUTHENTICATION_REQUIRED = 511
} t_http_codes;
typedef enum {
HTTPC_TE_IDENTITY,
HTTPC_TE_CHUNKED
} transferEncoding_t;
/**
* redirection follow mode.
* + `HTTPC_DISABLE_FOLLOW_REDIRECTS` - no redirection will be followed.
* + `HTTPC_STRICT_FOLLOW_REDIRECTS` - strict RFC2616, only requests using
* GET or HEAD methods will be redirected (using the same method),
* since the RFC requires end-user confirmation in other cases.
* + `HTTPC_FORCE_FOLLOW_REDIRECTS` - all redirections will be followed,
* regardless of a used method. New request will use the same method,
* and they will include the same body data and the same headers.
* In the sense of the RFC, it's just like every redirection is confirmed.
*/
typedef enum {
HTTPC_DISABLE_FOLLOW_REDIRECTS,
HTTPC_STRICT_FOLLOW_REDIRECTS,
HTTPC_FORCE_FOLLOW_REDIRECTS
} followRedirects_t;
class TransportTraits;
typedef std::unique_ptr<TransportTraits> TransportTraitsPtr;
class HTTPClient
{
public:
HTTPClient();
~HTTPClient();
/*
* Since both begin() functions take a reference to client as a parameter, you need to
* ensure the client object lives the entire time of the HTTPClient
*/
bool begin(WiFiClient &client, const String& url);
bool begin(WiFiClient &client, const String& host, uint16_t port, const String& uri = "/", bool https = false);
// old API is now explicitely forbidden
bool begin(String url) __attribute__ ((error("obsolete API, use ::begin(WiFiClient, url)")));
bool begin(String host, uint16_t port, String uri = "/") __attribute__ ((error("obsolete API, use ::begin(WiFiClient, host, port, uri)")));
bool begin(String url, const uint8_t httpsFingerprint[20]) __attribute__ ((error("obsolete API, use ::begin(WiFiClientSecure, ...)")));
bool begin(String host, uint16_t port, String uri, const uint8_t httpsFingerprint[20]) __attribute__ ((error("obsolete API, use ::begin(WiFiClientSecure, ...)")));
bool begin(String host, uint16_t port, String uri, bool https, String httpsFingerprint) __attribute__ ((error("obsolete API, use ::begin(WiFiClientSecure, ...)")));
void end(void);
bool connected(void);
void setReuse(bool reuse); /// keep-alive
void setUserAgent(const String& userAgent);
void setAuthorization(const char * user, const char * password);
void setAuthorization(const char * auth);
void setTimeout(uint16_t timeout);
// Redirections
void setFollowRedirects(followRedirects_t follow);
void setRedirectLimit(uint16_t limit); // max redirects to follow for a single request
bool setURL(const String& url); // handy for handling redirects
void useHTTP10(bool usehttp10 = true);
/// request handling
int GET();
int POST(const uint8_t* payload, size_t size);
int POST(const String& payload);
int PUT(const uint8_t* payload, size_t size);
int PUT(const String& payload);
int PATCH(const uint8_t* payload, size_t size);
int PATCH(const String& payload);
int sendRequest(const char* type, const String& payload);
int sendRequest(const char* type, const uint8_t* payload = NULL, size_t size = 0);
int sendRequest(const char* type, Stream * stream, size_t size = 0);
void addHeader(const String& name, const String& value, bool first = false, bool replace = true);
/// Response handling
void collectHeaders(const char* headerKeys[], const size_t headerKeysCount);
String header(const char* name); // get request header value by name
String header(size_t i); // get request header value by number
String headerName(size_t i); // get request header name by number
int headers(); // get header count
bool hasHeader(const char* name); // check if header exists
int getSize(void);
const String& getLocation(void); // Location header from redirect if 3XX
WiFiClient& getStream(void);
WiFiClient* getStreamPtr(void);
int writeToStream(Stream* stream);
const String& getString(void);
static String errorToString(int error);
protected:
struct RequestArgument {
String key;
String value;
};
bool beginInternal(const String& url, const char* expectedProtocol);
void disconnect(bool preserveClient = false);
void clear();
int returnError(int error);
bool connect(void);
bool sendHeader(const char * type);
int handleHeaderResponse();
int writeToStreamDataBlock(Stream * stream, int len);
WiFiClient* _client;
/// request handling
String _host;
uint16_t _port = 0;
bool _reuse = true;
uint16_t _tcpTimeout = HTTPCLIENT_DEFAULT_TCP_TIMEOUT;
bool _useHTTP10 = false;
String _uri;
String _protocol;
String _headers;
String _userAgent;
String _base64Authorization;
/// Response handling
RequestArgument* _currentHeaders = nullptr;
size_t _headerKeysCount = 0;
int _returnCode = 0;
int _size = -1;
bool _canReuse = false;
followRedirects_t _followRedirects = HTTPC_DISABLE_FOLLOW_REDIRECTS;
uint16_t _redirectLimit = 10;
String _location;
transferEncoding_t _transferEncoding = HTTPC_TE_IDENTITY;
std::unique_ptr<StreamString> _payload;
};
#endif /* ESP8266HTTPClient_H_ */