请教关于客户端升级程序的PHP脚本

ocptobe

返回文件的类型就是mime type类型，你可以参考相关文档。
比如GIF图片类型：header('Content-type: image/gif')
如果你要提供文件下载的话，用header('Content-type: application/octet-stream')类型。

staryshine

改成这个样子了。
                     header('Content-type: application/octet-stream');
        $url = "http://202.204.112.206/upgrade/test.php";
        header("Location: $url";
可是还是提示
Warning: Cannot add header information - headers already sent by (output started at /var/www/html/upgrade/index.php:8) in /var/www/html/upgrade/index.php on line 12

ocptobe

<?php
if (($_GET['m_pszAppName']==Supplicant) && ($_GET['IDS_VERSION']!=1.0)) {
   //以下是为客户端提供下载文件是示例，根据需要适当修改
   $file = fopen($file_dir.$file_name,"r";
       header('Content-type: application/octet-stream');
       Header("Accept-Ranges: bytes";
       Header("Accept-Length: ".filesize($file_dir.$file_name));
       Header("Content-Disposition: attachment; filename=".$file_name);
       echo fread($file,filesize($file_dir.$file_name));
       fclose($file);

}
else {
        echo "UP TO DATE";
}
?>

staryshine

改过了，还是有警告
Warning: Cannot add header information - headers already sent by (output started at /var/www/html/upgrade/index.php:8) in /var/www/html/upgrade/index.php on line 15

Warning: Cannot add header information - headers already sent by (output started at /var/www/html/upgrade/index.php:8) in /var/www/html/upgrade/index.php on line 16

Warning: Cannot add header information - headers already sent by (output started at /var/www/html/upgrade/index.php:8) in /var/www/html/upgrade/index.php on line 17

Warning: Cannot add header information - headers already sent by (output started at /var/www/html/upgrade/index.php:8) in /var/www/html/upgrade/index.php on line 18

ocptobe

header前不要有任何输出到浏览器

staryshine

header前没有任何输出到浏览器呀

if (($_GET['m_pszAppName']==Supplicant) && ($_GET['IDS_VERSION']!=1.0))
{
              $file_dir = "/var/www/html/upgrade/";
              $file_name = "uploadfile.txt";
              $file = fopen($file_dir.$file_name , "r";
                          Header('Content-type: application/octet-stream');
                          Header("Accept-Ranges: bytes";
                          Header("Accept-Length: ".filesize($file_dir.$file_name));
                          Header("Content-Disposition: attachment; filename=".$file_name);
                         echo fread($file,filesize($file_dir.$file_name));
                         fclose($file);

         }
                        else
         {
                                                         
         $url = "UP TO DATE";
        echo $url;
                        }

ocptobe

我测试了一下，在我这边没有问题，注意最上面不要有空行和空格。