图像文件下载问题 [英] Image file download problem

问题描述

我正在从服务器下载任何图像文件时遇到问题。

I am facing problem in downloading any image file from the server.

我可以成功上传它们，并可以从上传的位置打开它们，存储。

I am able to upload them successfully and can open them from the location where they are uploaded and stored.

当我使用我的功能下载图像文件完全下载，文件大小也是正确的，但当我打开他们我得到一个错误没有图像预览！

When i download using my function the image files get downloaded fully, file size is also correct but when i open them i get an error No image preview !!!

$fileString=$fileDir.'/'.$fileName; // combine the path and file
    // translate file name properly for Internet Explorer.
if (strstr($_SERVER['HTTP_USER_AGENT'], "MSIE"))
{
      $instance_name = preg_replace('/\./', '%2e', $instance_name, substr_count($instance_name, '.') - 1);
}
// make sure the file exists before sending headers

if(!$fdl=@fopen($fileString,'r'))
    {
       die("Cannot Open File!");
    } 
else 
    {
      header("Cache-Control: ");// leave blank to avoid IE errors
      header("Pragma: ");// leave blank to avoid IE errors
      header("Content-type: application/octet-stream");
      header("Content-Disposition: attachment; filename=\"".$instance_name."\"");
      header("Content-length:".(string)(filesize($fileString)));
      sleep(1);
      fpassthru($fdl);
    }

我使用IE作为浏览器。

I am using IE as browser.

我正在使用此代码段下载该文件，而不是在浏览器上显示。脚本执行，我得到提示是否要打开/保存文件。当我保存文件的大小也是正确的，但图像不显示。当我右键单击并查看该文件的摘要，它表示摘要不可用。

I am using this code snippet to download the file and not to show on the browser. The script executes and i get prompted on whether i want to open / save the file. When i save the file the size is also correct but the image doesn't show up. When i right click and see the summary of the file, it says the summary is unavailable.

提前感谢。请帮助。

推荐答案

您的代码不清楚，您是否使用此PHP代码段在网页上提供图像，例如：

It's not clear from your code, are you using this PHP snippet to serve the image on a web page, such as:

<img src="my-php-script.php" alt="blah blah blah" />

如果是，您的内容类型不正确。您需要使用图像MIME类型，例如image / gif，image / jpeg，image / png或image / tiff，以最合适的方式。

If so, your content-type is incorrect. You would need to use an image MIME type, such as image/gif, image/jpeg, image/png or image/tiff, whichever is most appropriate.

这篇关于图像文件下载问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！