ESP OTA update - server side

 <?php

date_default_timezone_set('America/New_York');

header('Content-type: text/plain; charset=utf8', true);

 

$pattern = ".php";

$debuglog = "/var/log/ESP8266-ESPUpdate.log";

 

//update files must be named "LoadCell-$Version_number.bin"

foreach(glob('./bin/LoadCell*.{bin}', GLOB_BRACE) as $filename){

     $filenm = pathinfo($filename, PATHINFO_FILENAME);

     $arr = explode('-', $filenm);

     $upd_version  = $arr[ count($arr) -1 ];

     error_log("\n".'['.date('Y-M-d H:m:s').'] Filename: '.$filename.' Shortname: '.$filenm.' Version: '.$upd_version."\n", 3, $debuglog);

}

 

function check_header($name, $value = false) {

    if(!isset($_SERVER[$name])) {

        return false;

    }

    if($value && $_SERVER[$name] != $value) {

        return false;

    }

    return true;

}

 

function sendFile($path) {

    header($_SERVER["SERVER_PROTOCOL"].' 200 OK', true, 200);

    header('Content-Type: application/octet-stream', true);

    header('Content-Disposition: attachment; filename='.basename($path));

    header('Content-Length: '.filesize($path), true);

    header('x-MD5: '.md5_file($path), true);

    readfile($path);

}

 

if(!check_header('HTTP_USER_AGENT', 'ESP8266-http-Update'))

{

    header($_SERVER["SERVER_PROTOCOL"].' 403 Forbidden', true, 403);

    echo "only for ESP8266 updater! (UA)\n";

    error_log("\n".'['.date('YYYY-MM-dd HH:mm:ss').'] Not correct user_agent.\n\n', 3, $debuglog);

    exit();

}

 

if(

    !check_header('HTTP_X_ESP8266_STA_MAC') ||

    !check_header('HTTP_X_ESP8266_AP_MAC') ||

    !check_header('HTTP_X_ESP8266_FREE_SPACE') ||

    !check_header('HTTP_X_ESP8266_SKETCH_SIZE') ||

    !check_header('HTTP_X_ESP8266_SKETCH_MD5') ||

    !check_header('HTTP_X_ESP8266_CHIP_SIZE') ||

    !check_header('HTTP_X_ESP8266_SDK_VERSION')

) {

    header($_SERVER["SERVER_PROTOCOL"].' 403 Forbidden', true, 403);

    echo "only for ESP8266 updater! (header)\n";

    error_log("\n".'['.date('Y-M-d H:m:s').'] Not correct headers.\n\n', 3, $debuglog);

    exit();

}

 

//    foreach (getallheaders() as $name => $value) {

//    error_log("\n".'['.date('Y-M-d H:m:s').'] Header_name: '.$name.": \t".$value, 3, $debuglog);

//    }

 

if (($_SERVER['HTTP_X_ESP8266_VERSION']) < $upd_version && $_SERVER["HTTP_X_ESP8266_SKETCH_MD5"] != md5_file($filename)) {

    sendFile($filename);

    error_log("\n".'['.date('Y-M-d H:m:s').'] NEED UPDATE! ', 3, $debuglog);

    error_log("\n".'['.date('Y-M-d H:m:s').'] Ver on server: '.($upd_version).' Ver remote: '.($_SERVER['HTTP_X_ESP8266_VERSION']), 3, $debuglog);

    error_log("\n".'['.date('Y-M-d H:m:s').'] MD5 on server: '.(md5_file($filename)).' Value remote: '.($_SERVER['HTTP_X_ESP8266_SKETCH_MD5'])."\n", 3, $debuglog);

} else {

    error_log("\n".'['.date('Y-M-d H:m:s').'] NO NEED. Ver equal, small or same MD5', 3, $debuglog);

    error_log("\n".'['.date('Y-M-d H:m:s').'] Ver on server: '.($upd_version).' Ver remote: '.($_SERVER['HTTP_X_ESP8266_VERSION']), 3, $debuglog);

    error_log("\n".'['.date('Y-M-d H:m:s').'] MD5 on server: '.(md5_file($filename)).' Value remote: '.($_SERVER['HTTP_X_ESP8266_SKETCH_MD5'])."\n", 3, $debuglog);

}

 

?>