arduino http 下载文件保存spiffs

arduino http 下载文件保存spiffs

#include <WiFi.h>
#include <HTTPClient.h>
#include <SPIFFS.h>
#include <Arduino.h>
#include <esp_heap_caps.h>

const char* ssid = "NBWIFI";
const char* password = "z7758521";
const char* url = "https://www.esp56.com/12300000/index.html";

void setup() {
  Serial.begin(115200);
  Serial.printf("Deafult free size: %d\n", heap_caps_get_free_size(MALLOC_CAP_DEFAULT));
  Serial.printf("PSRAM free size: %d\n", heap_caps_get_free_size(MALLOC_CAP_SPIRAM));

  // 连接 WiFi
  // 连接 WiFi
  WiFi.begin(ssid, password);

  Serial.print("正在连接 Wi-Fi");
  
  // 检测是否连接成功
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
    }

  Serial.println("连接成功");
  Serial.print("IP 地址：");
  Serial.println(WiFi.localIP());

  // 挂载 SPIFFS
  if (!SPIFFS.begin(true)) {
    Serial.println("An error has occurred while mounting SPIFFS");
    return;
  }

  // 创建 HTTPClient 对象
  HTTPClient http;

  // 开始下载
  http.begin(url);
  int httpCode = http.GET();
  if (httpCode > 0) {

    String txt = http.getString(); // Get the request response payload

    Serial.println(txt);

    // 打开文件进行写入
    File file = SPIFFS.open("/index.html", FILE_WRITE);
    if (!file) {
      Serial.println("Failed to open file for writing");
      return;
    }

    // 获取响应体并写入文件
    // 将字符串写入到文件中
    file.print(txt);

    // 关闭文件
    file.close();
    Serial.println("File downloaded and saved");
  } else {
    Serial.printf("Failed to download file, HTTP error code: %d\n", httpCode);
  }




 // 检查文件是否存在
  if (SPIFFS.exists("/index.html")) {



    // 打开文件进行读取
     File file = SPIFFS.open("/index.html", FILE_READ);
    if (!file) {
      Serial.println("Failed to open file for reading");
      return;
    }
    Serial.println("文件存在");
      Serial.print("index.html的大小:");
  Serial.println(file.size());
    // 读取并输出文件内容
    String content = file.readString();
    Serial.println(content);

    // 关闭文件
    file.close();
  } else {
    Serial.println("File does not exist");
  }



 
  Serial.printf("SPIFFS的总体积: %d 字节\r\n", SPIFFS.totalBytes()/1024);
  Serial.printf("SPIFFS的已用体积: %d 字节\r\n", SPIFFS.usedBytes()/1024);
 
  //SPIFFS.end();



  Serial.printf("Deafult free size: %d\n", heap_caps_get_free_size(MALLOC_CAP_DEFAULT));
  Serial.printf("PSRAM free size: %d\n", heap_caps_get_free_size(MALLOC_CAP_SPIRAM));

delay(10000);

  // 关闭 HTTP 连接
  http.end();
}

void loop() {
  // 主循环代码...



  Serial.printf("Deafult free size: %d\n", heap_caps_get_free_size(MALLOC_CAP_DEFAULT));
  Serial.printf("PSRAM free size: %d\n", heap_caps_get_free_size(MALLOC_CAP_SPIRAM));

  delay(10000);

}