标签:http Arduino ESP32 len print HTTP Serial size
实现
#include <HTTPClient.h>
#include <WiFi.h>
void getFile(String file_name)
{
HTTPClient http;
Serial.print("[HTTP] begin...\n");
String storage_path = "/image/" + file_name;
http.begin("http://host:port/file/" + file_name);
Serial.print("[HTTP] GET...\n");
int httpCode = http.GET();
if (httpCode > 0)
{
Serial.printf("[HTTP] GET... code: %d\n", httpCode);
if (httpCode == HTTP_CODE_OK)
{
int len = http.getSize();
Serial.print("file size: ");
Serial.print(len);
Serial.print("Byte(");
Serial.print(len / 1024);
Serial.println("kB)");
WiFiClient *stream = http.getStreamPtr();
Serial.println(stream->available());
// read all data from server
while (http.connected() && (len > 0 || len == -1))
{
size_t size = stream->available();
if (size)
{
size_t read_size = ((size > sizeof(buff)) ? sizeof(buff) : size);
int c = stream->readBytes(buff, read_size);
buff[read_size] = 0;
tf.appendBinToSd(storage_path.c_str(), buff, read_size);
Serial.print(".");
if (len > 0)
{
len -= c;
}
}
}
Serial.println();
Serial.print("[HTTP] connection closed or file end.\n");
}
}
else
{
Serial.printf("[HTTP] GET... failed, error: %s\n",
http.errorToString(httpCode).c_str());
}
http.end();
}
标签:http,Arduino,ESP32,len,print,HTTP,Serial,size 来源: https://blog.csdn.net/star_melon/article/details/119489669
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