Question about ESP8266HTTPClient & direct access to Stream
Posted: Wed Dec 09, 2020 12:07 pmHi,
I made a simple ring buffer class and am unable to access the ESP8266HTTPClient stream in order to reduce the stream.read() overhead. What am I doing wrong?
P.S. The ring buffer class function declaration - uint16_t write(uint8_t *dstBuffer, uint16_t length);
I made a simple ring buffer class and am unable to access the ESP8266HTTPClient stream in order to reduce the stream.read() overhead. What am I doing wrong?
P.S. The ring buffer class function declaration - uint16_t write(uint8_t *dstBuffer, uint16_t length);
Code: Select all
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266HTTPClient.h>
#include <RingBuffer.h>
#define RING_BUFFER_SIZE 256
#define URL_ADDRESS "http://address"
RingBuffer ringBuffer(RING_BUFFER_SIZE);
WiFiClient client;
HTTPClient http;
int16_t readBytes;
void setup(){
if (http.begin(client, URL_ADDRESS) == true)
{
int16_t httpCode = http.GET();
if (httpCode == HTTP_CODE_OK)
{
Serial.println(F("ESP CLIENT..............connected to server"));
}
else
{
Serial.printf_P(PSTR("ESP CLIENT..............connection to server failed, %s\n"), http.errorToString(httpCode).c_str());
}
}
}
void loop() {
WiFiClient *stream = http.getStreamPtr();
readBytes = stream->available();
readBytes = readBytes < ringBuffer.freeSpace() ? readBytes : ringBuffer.freeSpace();
ringBuffer.write(reinterpret_cast<uint8_t*>(stream), readBytes); //read directly from HTTP client stream to ring buffer
}