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Copy pathESP8266HTTPClient.cpp
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1033 lines (855 loc) · 28.7 KB
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/**
* ESP8266HTTPClient.cpp
*
* 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
*
*/
#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h>
#include <StreamString.h>
#include <base64.h>
#include "ESP8266HTTPClient.h"
/**
* constractor
*/
HTTPClient::HTTPClient() {
_tcp = NULL;
_tcps = NULL;
_port = 0;
_reuse = false;
_tcpTimeout = HTTPCLIENT_DEFAULT_TCP_TIMEOUT;
_useHTTP10 = false;
_https = false;
_userAgent = "ESP8266HTTPClient";
_headerKeysCount = 0;
_currentHeaders = NULL;
_returnCode = 0;
_size = -1;
_canReuse = false;
_transferEncoding = HTTPC_TE_IDENTITY;
}
/**
* deconstractor
*/
HTTPClient::~HTTPClient() {
if(_tcps) {
_tcps->stop();
delete _tcps;
_tcps = NULL;
_tcp = NULL;
} else if(_tcp) {
_tcp->stop();
delete _tcp;
_tcp = NULL;
}
if(_currentHeaders) {
delete[] _currentHeaders;
}
}
/**
* phasing the url for all needed informations
* @param url const char *
* @param httpsFingerprint const char *
*/
void HTTPClient::begin(const char *url, const char * httpsFingerprint) {
begin(String(url), String(httpsFingerprint));
}
/**
* phasing the url for all needed informations
* @param url String
* @param httpsFingerprint String
*/
void HTTPClient::begin(String url, String httpsFingerprint) {
DEBUG_HTTPCLIENT("[HTTP-Client][begin] url: %s\n", url.c_str());
_httpsFingerprint = httpsFingerprint;
_returnCode = 0;
_size = -1;
_Headers = "";
String protocol;
// check for : (http: or https:
int index = url.indexOf(':');
//int index2;
bool hasPort = false;
if(index >= 0) {
protocol = url.substring(0, index);
url.remove(0, (index + 3)); // remove http:// or https://
index = url.indexOf('/');
String host = url.substring(0, index);
url.remove(0, index); // remove host part
// get Authorization
index = host.indexOf('@');
if(index >= 0) {
// auth info
String auth = host.substring(0, index);
host.remove(0, index + 1); // remove auth part including @
_base64Authorization = base64::encode(auth);
}
// get port
index = host.indexOf(':');
if(index >= 0) {
_host = host.substring(0, index); // hostname
host.remove(0, (index + 1)); // remove hostname + :
_port = host.toInt(); // get port
hasPort = true;
} else {
_host = host;
}
_url = url;
if(protocol.equalsIgnoreCase("http")) {
_https = false;
if(!hasPort) {
_port = 80;
}
} else if(protocol.equalsIgnoreCase("https")) {
_https = true;
if(!hasPort) {
_port = 443;
}
} else {
DEBUG_HTTPCLIENT("[HTTP-Client][begin] protocol: %s unknown?!\n", protocol.c_str());
return;
}
}
DEBUG_HTTPCLIENT("[HTTP-Client][begin] host: %s port: %d url: %s https: %d httpsFingerprint: %s\n", _host.c_str(), _port, _url.c_str(), _https, _httpsFingerprint.c_str());
}
/**
* begin
* @param host const char *
* @param port uint16_t
* @param url const char *
* @param https bool
* @param httpsFingerprint const char *
*/
void HTTPClient::begin(const char *host, uint16_t port, const char * url, bool https, const char * httpsFingerprint) {
DEBUG_HTTPCLIENT("[HTTP-Client][begin] host: %s port:%d url: %s https: %d httpsFingerprint: %s\n", host, port, url, https, httpsFingerprint);
_host = host;
_port = port;
_url = url;
_https = https;
_httpsFingerprint = httpsFingerprint;
_returnCode = 0;
_size = -1;
_Headers = "";
}
void HTTPClient::begin(String host, uint16_t port, String url, bool https, String httpsFingerprint) {
begin(host.c_str(), port, url.c_str(), https, httpsFingerprint.c_str());
}
/**
* end
* called after the payload is handled
*/
void HTTPClient::end(void) {
if(connected()) {
if(_tcp->available() > 0) {
DEBUG_HTTPCLIENT("[HTTP-Client][end] still data in buffer (%d), clean up.\n", _tcp->available());
while(_tcp->available() > 0) {
_tcp->read();
}
}
if(_reuse && _canReuse) {
DEBUG_HTTPCLIENT("[HTTP-Client][end] tcp keep open for reuse\n");
} else {
DEBUG_HTTPCLIENT("[HTTP-Client][end] tcp stop\n");
_tcp->stop();
}
} else {
DEBUG_HTTPCLIENT("[HTTP-Client][end] tcp is closed\n");
}
}
/**
* connected
* @return connected status
*/
bool HTTPClient::connected() {
if(_tcp) {
return (_tcp->connected() || (_tcp->available() > 0));
}
return false;
}
/**
* try to reuse the connection to the server
* keep-alive
* @param reuse bool
*/
void HTTPClient::setReuse(bool reuse) {
_reuse = reuse;
}
/**
* set User Agent
* @param userAgent const char *
*/
void HTTPClient::setUserAgent(const char * userAgent) {
_userAgent = userAgent;
}
/**
* set the Authorizatio for the http request
* @param user const char *
* @param password const char *
*/
void HTTPClient::setAuthorization(const char * user, const char * password) {
if(user && password) {
String auth = user;
auth += ":";
auth += password;
_base64Authorization = base64::encode(auth);
}
}
/**
* set the Authorizatio for the http request
* @param auth const char * base64
*/
void HTTPClient::setAuthorization(const char * auth) {
if(auth) {
_base64Authorization = auth;
}
}
/**
* set the timeout for the TCP connection
* @param timeout unsigned int
*/
void HTTPClient::setTimeout(uint16_t timeout) {
_tcpTimeout = timeout;
if(connected()) {
_tcp->setTimeout(timeout);
}
}
/**
* use HTTP1.0
* @param timeout
*/
void HTTPClient::useHTTP10(bool useHTTP10) {
_useHTTP10 = useHTTP10;
}
/**
* send a GET request
* @return http code
*/
int HTTPClient::GET() {
return sendRequest("GET");
}
/**
* sends a post request to the server
* @param payload uint8_t *
* @param size size_t
* @return http code
*/
int HTTPClient::POST(uint8_t * payload, size_t size) {
return sendRequest("POST", payload, size);
}
int HTTPClient::POST(String payload) {
return POST((uint8_t *) payload.c_str(), payload.length());
}
/**
* sendRequest
* @param type const char * "GET", "POST", ....
* @param payload String data for the message body
* @return
*/
int HTTPClient::sendRequest(const char * type, String payload) {
return sendRequest(type, (uint8_t *) payload.c_str(), payload.length());
}
/**
* sendRequest
* @param type const char * "GET", "POST", ....
* @param payload uint8_t * data for the message body if null not send
* @param size size_t size for the message body if 0 not send
* @return -1 if no info or > 0 when Content-Length is set by server
*/
int HTTPClient::sendRequest(const char * type, uint8_t * payload, size_t size) {
// connect to server
if(!connect()) {
return returnError(HTTPC_ERROR_CONNECTION_REFUSED);
}
if(payload && size > 0) {
addHeader("Content-Length", String(size));
}
// send Header
if(!sendHeader(type)) {
return returnError(HTTPC_ERROR_SEND_HEADER_FAILED);
}
// send Payload if needed
if(payload && size > 0) {
if(_tcp->write(&payload[0], size) != size) {
return returnError(HTTPC_ERROR_SEND_PAYLOAD_FAILED);
}
}
// handle Server Response (Header)
return returnError(handleHeaderResponse());
}
/**
* sendRequest
* @param type const char * "GET", "POST", ....
* @param stream Stream * data stream for the message body
* @param size size_t size for the message body if 0 not Content-Length is send
* @return -1 if no info or > 0 when Content-Length is set by server
*/
int HTTPClient::sendRequest(const char * type, Stream * stream, size_t size) {
if(!stream) {
return returnError(HTTPC_ERROR_NO_STREAM);
}
// connect to server
if(!connect()) {
return returnError(HTTPC_ERROR_CONNECTION_REFUSED);
}
if(size > 0) {
addHeader("Content-Length", String(size));
}
// send Header
if(!sendHeader(type)) {
return returnError(HTTPC_ERROR_SEND_HEADER_FAILED);
}
int buff_size = HTTP_TCP_BUFFER_SIZE;
int len = size;
int bytesWritten = 0;
if(len == 0) {
len = -1;
}
// if possible create smaller buffer then HTTP_TCP_BUFFER_SIZE
if((len > 0) && (len < HTTP_TCP_BUFFER_SIZE)) {
buff_size = len;
}
// create buffer for read
uint8_t * buff = (uint8_t *) malloc(buff_size);
if(buff) {
// read all data from stream and send it to server
while(connected() && (stream->available() > -1) && (len > 0 || len == -1)) {
// get available data size
int sizeAvailable = stream->available();
if(sizeAvailable) {
int readBytes = sizeAvailable;
// read only the asked bytes
if(len > 0 && readBytes > len) {
readBytes = len;
}
// not read more the buffer can handle
if(readBytes > buff_size) {
readBytes = buff_size;
}
// read data
int bytesRead = stream->readBytes(buff, readBytes);
// write it to Stream
int bytesWrite = _tcp->write((const uint8_t *) buff, bytesRead);
bytesWritten += bytesWrite;
// are all Bytes a writen to stream ?
if(bytesWrite != bytesRead) {
DEBUG_HTTPCLIENT("[HTTP-Client][sendRequest] short write, asked for %d but got %d retry...\n", bytesRead, bytesWrite);
// check for write error
if(_tcp->getWriteError()) {
DEBUG_HTTPCLIENT("[HTTP-Client][sendRequest] stream write error %d\n", _tcp->getWriteError());
//reset write error for retry
_tcp->clearWriteError();
}
// some time for the stream
delay(1);
int leftBytes = (readBytes - bytesWrite);
// retry to send the missed bytes
bytesWrite = _tcp->write((const uint8_t *) (buff + bytesWrite), leftBytes);
bytesWritten += bytesWrite;
if(bytesWrite != leftBytes) {
// failed again
DEBUG_HTTPCLIENT("[HTTP-Client][sendRequest] short write, asked for %d but got %d failed.\n", leftBytes, bytesWrite);
free(buff);
return returnError(HTTPC_ERROR_SEND_PAYLOAD_FAILED);
}
}
// check for write error
if(_tcp->getWriteError()) {
DEBUG_HTTPCLIENT("[HTTP-Client][sendRequest] stream write error %d\n", _tcp->getWriteError());
free(buff);
return returnError(HTTPC_ERROR_SEND_PAYLOAD_FAILED);
}
// count bytes to read left
if(len > 0) {
len -= readBytes;
}
delay(0);
} else {
delay(1);
}
}
free(buff);
if(size && (int) size != bytesWritten) {
DEBUG_HTTPCLIENT("[HTTP-Client][sendRequest] Stream payload bytesWritten %d and size %d mismatch!.\n", bytesWritten, size); DEBUG_HTTPCLIENT("[HTTP-Client][sendRequest] ERROR SEND PAYLOAD FAILED!");
return returnError(HTTPC_ERROR_SEND_PAYLOAD_FAILED);
} else {
DEBUG_HTTPCLIENT("[HTTP-Client][sendRequest] Stream payload written: %d\n", bytesWritten);
}
} else {
DEBUG_HTTPCLIENT("[HTTP-Client][sendRequest] too less ram! need %d\n", HTTP_TCP_BUFFER_SIZE);
return returnError(HTTPC_ERROR_TOO_LESS_RAM);
}
// handle Server Response (Header)
return returnError(handleHeaderResponse());
}
/**
* size of message body / payload
* @return -1 if no info or > 0 when Content-Length is set by server
*/
int HTTPClient::getSize(void) {
return _size;
}
/**
* deprecated Note: this is not working with https!
* returns the stream of the tcp connection
* @return WiFiClient
*/
WiFiClient & HTTPClient::getStream(void) {
if(connected()) {
return *_tcp;
}
DEBUG_HTTPCLIENT("[HTTP-Client] no stream to return!?\n");
// todo return error?
}
/**
* returns the stream of the tcp connection
* @return WiFiClient *
*/
WiFiClient * HTTPClient::getStreamPtr(void) {
if(connected()) {
return _tcp;
}
DEBUG_HTTPCLIENT("[HTTP-Client] no stream to return!?\n");
return NULL;
}
/**
* write all message body / payload to Stream
* @param stream Stream *
* @return bytes written ( negative values are error codes )
*/
int HTTPClient::writeToStream(Stream * stream) {
if(!stream) {
return returnError(HTTPC_ERROR_NO_STREAM);
}
if(!connected()) {
return returnError(HTTPC_ERROR_NOT_CONNECTED);
}
// get length of document (is -1 when Server sends no Content-Length header)
int len = _size;
int ret = 0;
if(_transferEncoding == HTTPC_TE_IDENTITY) {
ret = writeToStreamDataBlock(stream, len);
// have we an error?
if(ret < 0) {
return returnError(ret);
}
} else if(_transferEncoding == HTTPC_TE_CHUNKED) {
int size = 0;
while(1) {
if(!connected()) {
return returnError(HTTPC_ERROR_CONNECTION_LOST);
}
String chunkHeader = _tcp->readStringUntil('\n');
if(chunkHeader.length() <= 0) {
return returnError(HTTPC_ERROR_READ_TIMEOUT);
}
chunkHeader.trim(); // remove \r
// read size of chunk
len = (uint32_t) strtol((const char *) chunkHeader.c_str(), NULL, 16);
size += len;
DEBUG_HTTPCLIENT("[HTTP-Client] read chunk len: %d\n", len);
// data left?
if(len > 0) {
int r = writeToStreamDataBlock(stream, len);
if(r < 0) {
// error in writeToStreamDataBlock
return returnError(r);
}
ret += r;
} else {
// if no length Header use global chunk size
if(_size <= 0) {
_size = size;
}
// check if we have write all data out
if(ret != _size) {
return returnError(HTTPC_ERROR_STREAM_WRITE);
}
break;
}
delay(0);
}
} else {
return returnError(HTTPC_ERROR_ENCODING);
}
end();
return ret;
}
/**
* return all payload as String (may need lot of ram or trigger out of memory!)
* @return String
*/
String HTTPClient::getString(void) {
StreamString sstring;
if(_size) {
// try to reserve needed memmory
if(!sstring.reserve((_size + 1))) {
DEBUG_HTTPCLIENT("[HTTP-Client][getString] too less memory to reserve as string! need: %d\n", (_size + 1));
return String("--too less memory--");
}
}
writeToStream(&sstring);
return sstring;
}
/**
* converts error code to String
* @param error int
* @return String
*/
String HTTPClient::errorToString(int error) {
switch(error) {
case HTTPC_ERROR_CONNECTION_REFUSED:
return String("connection refused");
case HTTPC_ERROR_SEND_HEADER_FAILED:
return String("send header failed");
case HTTPC_ERROR_SEND_PAYLOAD_FAILED:
return String("send payload failed");
case HTTPC_ERROR_NOT_CONNECTED:
return String("not connected");
case HTTPC_ERROR_CONNECTION_LOST:
return String("connection lost");
case HTTPC_ERROR_NO_STREAM:
return String("no stream");
case HTTPC_ERROR_NO_HTTP_SERVER:
return String("no HTTP server");
case HTTPC_ERROR_TOO_LESS_RAM:
return String("too less ram");
case HTTPC_ERROR_ENCODING:
return String("Transfer-Encoding not supported");
case HTTPC_ERROR_STREAM_WRITE:
return String("Stream write error");
case HTTPC_ERROR_READ_TIMEOUT:
return String("read Timeout");
default:
return String();
}
}
/**
* adds Header to the request
* @param name
* @param value
* @param first
*/
void HTTPClient::addHeader(const String& name, const String& value, bool first) {
// not allow set of Header handled by code
if(!name.equalsIgnoreCase("Connection") && !name.equalsIgnoreCase("User-Agent") && !name.equalsIgnoreCase("Host") && !(_base64Authorization.length() && name.equalsIgnoreCase("Authorization"))) {
String headerLine = name;
headerLine += ": ";
headerLine += value;
headerLine += "\r\n";
if(first) {
_Headers = headerLine + _Headers;
} else {
_Headers += headerLine;
}
}
}
void HTTPClient::collectHeaders(const char* headerKeys[], const size_t headerKeysCount) {
_headerKeysCount = headerKeysCount;
if(_currentHeaders)
delete[] _currentHeaders;
_currentHeaders = new RequestArgument[_headerKeysCount];
for(size_t i = 0; i < _headerKeysCount; i++) {
_currentHeaders[i].key = headerKeys[i];
}
}
String HTTPClient::header(const char* name) {
for(size_t i = 0; i < _headerKeysCount; ++i) {
if(_currentHeaders[i].key == name)
return _currentHeaders[i].value;
}
return String();
}
String HTTPClient::header(size_t i) {
if(i < _headerKeysCount)
return _currentHeaders[i].value;
return String();
}
String HTTPClient::headerName(size_t i) {
if(i < _headerKeysCount)
return _currentHeaders[i].key;
return String();
}
int HTTPClient::headers() {
return _headerKeysCount;
}
bool HTTPClient::hasHeader(const char* name) {
for(size_t i = 0; i < _headerKeysCount; ++i) {
if((_currentHeaders[i].key == name) && (_currentHeaders[i].value.length() > 0))
return true;
}
return false;
}
/**
* init TCP connection and handle ssl verify if needed
* @return true if connection is ok
*/
bool HTTPClient::connect(void) {
if(connected()) {
DEBUG_HTTPCLIENT("[HTTP-Client] connect. already connected, try reuse!\n");
while(_tcp->available() > 0) {
_tcp->read();
}
return true;
}
if(_https) {
DEBUG_HTTPCLIENT("[HTTP-Client] connect https...\n");
if(_tcps) {
delete _tcps;
_tcps = NULL;
_tcp = NULL;
}
_tcps = new WiFiClientSecure();
_tcp = _tcps;
} else {
DEBUG_HTTPCLIENT("[HTTP-Client] connect http...\n");
if(_tcp) {
delete _tcp;
_tcp = NULL;
}
_tcp = new WiFiClient();
}
if(!_tcp->connect(_host.c_str(), _port)) {
DEBUG_HTTPCLIENT("[HTTP-Client] failed connect to %s:%u\n", _host.c_str(), _port);
return false;
}
DEBUG_HTTPCLIENT("[HTTP-Client] connected to %s:%u\n", _host.c_str(), _port);
if(_https && _httpsFingerprint.length() > 0) {
if(_tcps->verify(_httpsFingerprint.c_str(), _host.c_str())) {
DEBUG_HTTPCLIENT("[HTTP-Client] https certificate matches\n");
} else {
DEBUG_HTTPCLIENT("[HTTP-Client] https certificate doesn't match!\n");
_tcp->stop();
return false;
}
}
// set Timeout for readBytesUntil and readStringUntil
_tcp->setTimeout(_tcpTimeout);
#ifdef ESP8266
_tcp->setNoDelay(true);
#endif
return connected();
}
/**
* sends HTTP request header
* @param type (GET, POST, ...)
* @return status
*/
bool HTTPClient::sendHeader(const char * type) {
if(!connected()) {
return false;
}
String header = String(type) + " " + _url + " HTTP/1.";
if(_useHTTP10) {
header += "0";
} else {
header += "1";
}
header += "\r\n"
"Host: " + _host + "\r\n"
"User-Agent: " + _userAgent + "\r\n"
"Connection: ";
if(_reuse) {
header += "keep-alive";
} else {
header += "close";
}
header += "\r\n";
if(!_useHTTP10) {
header += "Accept-Encoding: identity;q=1,chunked;q=0.1,*;q=0\r\n";
}
if(_base64Authorization.length()) {
header += "Authorization: Basic " + _base64Authorization + "\r\n";
}
header += _Headers + "\r\n";
return (_tcp->write(header.c_str(), header.length()) == header.length());
}
/**
* reads the response from the server
* @return int http code
*/
int HTTPClient::handleHeaderResponse() {
if(!connected()) {
return HTTPC_ERROR_NOT_CONNECTED;
}
String transferEncoding;
_returnCode = -1;
_size = -1;
_transferEncoding = HTTPC_TE_IDENTITY;
unsigned long lastDataTime = millis();
while(connected()) {
size_t len = _tcp->available();
if(len > 0) {
String headerLine = _tcp->readStringUntil('\n');
headerLine.trim(); // remove \r
lastDataTime = millis();
DEBUG_HTTPCLIENT("[HTTP-Client][handleHeaderResponse] RX: '%s'\n", headerLine.c_str());
if(headerLine.startsWith("HTTP/1.")) {
_returnCode = headerLine.substring(9, headerLine.indexOf(' ', 9)).toInt();
} else if(headerLine.indexOf(':')) {
String headerName = headerLine.substring(0, headerLine.indexOf(':'));
String headerValue = headerLine.substring(headerLine.indexOf(':') + 2);
if(headerName.equalsIgnoreCase("Content-Length")) {
_size = headerValue.toInt();
}
if(headerName.equalsIgnoreCase("Connection")) {
_canReuse = headerValue.equalsIgnoreCase("keep-alive");
}
if(headerName.equalsIgnoreCase("Transfer-Encoding")) {
transferEncoding = headerValue;
}
for(size_t i = 0; i < _headerKeysCount; i++) {
if(_currentHeaders[i].key.equalsIgnoreCase(headerName)) {
_currentHeaders[i].value = headerValue;
break;
}
}
}
if(headerLine == "") {
DEBUG_HTTPCLIENT("[HTTP-Client][handleHeaderResponse] code: %d\n", _returnCode);
if(_size > 0) {
DEBUG_HTTPCLIENT("[HTTP-Client][handleHeaderResponse] size: %d\n", _size);
}
if(transferEncoding.length() > 0) {
DEBUG_HTTPCLIENT("[HTTP-Client][handleHeaderResponse] Transfer-Encoding: %s\n", transferEncoding.c_str());
if(transferEncoding.equalsIgnoreCase("chunked")) {
_transferEncoding = HTTPC_TE_CHUNKED;
} else {
return HTTPC_ERROR_ENCODING;
}
} else {
_transferEncoding = HTTPC_TE_IDENTITY;
}
if(_returnCode) {
return _returnCode;
} else {
DEBUG_HTTPCLIENT("[HTTP-Client][handleHeaderResponse] Remote host is not an HTTP Server!");
return HTTPC_ERROR_NO_HTTP_SERVER;
}
}
} else {
if((millis() - lastDataTime) > _tcpTimeout) {
return HTTPC_ERROR_READ_TIMEOUT;
}
delay(0);
}
}
return HTTPC_ERROR_CONNECTION_LOST;
}
/**
* write one Data Block to Stream
* @param stream Stream *
* @param size int
* @return < 0 = error >= 0 = size written
*/
int HTTPClient::writeToStreamDataBlock(Stream * stream, int size) {
int buff_size = HTTP_TCP_BUFFER_SIZE;
int len = size;
int bytesWritten = 0;
// if possible create smaller buffer then HTTP_TCP_BUFFER_SIZE
if((len > 0) && (len < HTTP_TCP_BUFFER_SIZE)) {
buff_size = len;
}
// create buffer for read
uint8_t * buff = (uint8_t *) malloc(buff_size);
if(buff) {
// read all data from server
while(connected() && (len > 0 || len == -1)) {
// get available data size
size_t sizeAvailable = _tcp->available();
if(sizeAvailable) {
int readBytes = sizeAvailable;
// read only the asked bytes
if(len > 0 && readBytes > len) {
readBytes = len;
}
// not read more the buffer can handle
if(readBytes > buff_size) {
readBytes = buff_size;
}
// read data
int bytesRead = _tcp->readBytes(buff, readBytes);
// write it to Stream
int bytesWrite = stream->write(buff, bytesRead);
bytesWritten += bytesWrite;
// are all Bytes a writen to stream ?
if(bytesWrite != bytesRead) {
DEBUG_HTTPCLIENT("[HTTP-Client][writeToStream] short write asked for %d but got %d retry...\n", bytesRead, bytesWrite);
// check for write error
if(stream->getWriteError()) {
DEBUG_HTTPCLIENT("[HTTP-Client][writeToStreamDataBlock] stream write error %d\n", stream->getWriteError());
//reset write error for retry
stream->clearWriteError();
}
// some time for the stream
delay(1);
int leftBytes = (readBytes - bytesWrite);
// retry to send the missed bytes
bytesWrite = stream->write((buff + bytesWrite), leftBytes);
bytesWritten += bytesWrite;
if(bytesWrite != leftBytes) {
// failed again
DEBUG_HTTPCLIENT("[HTTP-Client][writeToStream] short write asked for %d but got %d failed.\n", leftBytes, bytesWrite);
free(buff);
return HTTPC_ERROR_STREAM_WRITE;
}
}
// check for write error
if(stream->getWriteError()) {
DEBUG_HTTPCLIENT("[HTTP-Client][writeToStreamDataBlock] stream write error %d\n", stream->getWriteError());
free(buff);
return HTTPC_ERROR_STREAM_WRITE;
}
// count bytes to read left
if(len > 0) {
len -= readBytes;
}
delay(0);
} else {
delay(1);
}
}
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