如何通过php从链接下载大文件?
我正在尝试使用php从外部链接下载一个大文件,我对这个主题没有太大的想法,我尝试使用下面的代码,但它总是给我文件不存在 我将iffile_exists$filePath更改为iftrue,但最后下载了一个0字节大小的文件,代码中的错误在哪里如何通过php从链接下载大文件?,php,http-headers,content-type,Php,Http Headers,Content Type,我正在尝试使用php从外部链接下载一个大文件,我对这个主题没有太大的想法,我尝试使用下面的代码,但它总是给我文件不存在 我将iffile_exists$filePath更改为iftrue,但最后下载了一个0字节大小的文件,代码中的错误在哪里 $filePath = "http://down.egyu.net/Movies/The.Gambler.2014.720p.BluRay.x264.EGFire.CoM.mp4"; // set your download file path here.
$filePath = "http://down.egyu.net/Movies/The.Gambler.2014.720p.BluRay.x264.EGFire.CoM.mp4"; // set your download file path here.
download($filePath); // calls download function
function download($filePath)
{
if(!empty($filePath))
{
$fileInfo = pathinfo($filePath);
$fileName = $fileInfo['basename'];
$fileExtnesion = $fileInfo['extension'];
$default_contentType = "application/octet-stream";
$content_types_list = mimeTypes();
// to find and use specific content type, check out this IANA page : http://www.iana.org/assignments/media-types/media-types.xhtml
if (array_key_exists($fileExtnesion, $content_types_list))
{
$contentType = $content_types_list[$fileExtnesion];
}
else
{
$contentType = $default_contentType;
}
if(file_exists($filePath))
{
$size = filesize($filePath);
$offset = 0;
$length = $size;
//HEADERS FOR PARTIAL DOWNLOAD FACILITY BEGINS
if(isset($_SERVER['HTTP_RANGE']))
{
preg_match('/bytes=(\d+)-(\d+)?/', $_SERVER['HTTP_RANGE'], $matches);
$offset = intval($matches[1]);
$length = intval($matches[2]) - $offset;
$fhandle = fopen($filePath, 'r');
fseek($fhandle, $offset); // seek to the requested offset, this is 0 if it's not a partial content request
$data = fread($fhandle, $length);
fclose($fhandle);
header('HTTP/1.1 206 Partial Content');
header('Content-Range: bytes ' . $offset . '-' . ($offset + $length) . '/' . $size);
}//HEADERS FOR PARTIAL DOWNLOAD FACILITY BEGINS
//USUAL HEADERS FOR DOWNLOAD
header("Content-Disposition: attachment;filename=".$fileName);
header('Content-Type: '.$contentType);
header("Accept-Ranges: bytes");
header("Pragma: public");
header("Expires: -1");
header("Cache-Control: no-cache");
header("Cache-Control: public, must-revalidate, post-check=0, pre-check=0");
header("Content-Length: ".filesize($filePath));
$chunksize = 8 * (1024 * 1024); //8MB (highest possible fread length)
if ($size > $chunksize)
{
$handle = fopen($_FILES["file"]["tmp_name"], 'rb');
$buffer = '';
while (!feof($handle) && (connection_status() === CONNECTION_NORMAL))
{
$buffer = fread($handle, $chunksize);
print $buffer;
ob_flush();
flush();
}
if(connection_status() !== CONNECTION_NORMAL)
{
echo "Connection aborted";
}
fclose($handle);
}
else
{
ob_clean();
flush();
readfile($filePath);
}
}
else
{
echo 'File does not exist!';
}
}
else
{
echo 'There is no file to download!';
}
}
我自己找到了答案,我使用一个函数获取url的状态(如果存在)并获取文件大小:
/* You may need these ini settings too */
set_time_limit(0);
ini_set('memory_limit', '512M');
//THE DOWNLOAD SCRIPT
$filePath = "http://down.egyu.net/Movies/The.Gambler.2014.720p.BluRay.x264.EGFire.CoM.mp4"; // set your download file path here.
download($filePath); // calls download function
function download($filePath)
{
if(!empty($filePath))
{
$fileInfo = pathinfo($filePath);
$fileName = $fileInfo['basename'];
$fileExtnesion = $fileInfo['extension'];
$default_contentType = "application/octet-stream";
$content_types_list = mimeTypes();
// to find and use specific content type, check out this IANA page : http://www.iana.org/assignments/media-types/media-types.xhtml
if (array_key_exists($fileExtnesion, $content_types_list))
{
$contentType = $content_types_list[$fileExtnesion];
}
else
{
$contentType = $default_contentType;
}
$exist = is_url_exist($fileInfo['dirname']."/".$fileInfo['basename']);
if($exist['response'])
{
$size = $exist['size'];
$offset = 0;
$length = $size;
//HEADERS FOR PARTIAL DOWNLOAD FACILITY BEGINS
if(isset($_SERVER['HTTP_RANGE']))
{
preg_match('/bytes=(\d+)-(\d+)?/', $_SERVER['HTTP_RANGE'], $matches);
$offset = intval($matches[1]);
$length = intval($matches[2]) - $offset;
$fhandle = fopen($filePath, 'r');
fseek($fhandle, $offset); // seek to the requested offset, this is 0 if it's not a partial content request
$data = fread($fhandle, $length);
fclose($fhandle);
header('HTTP/1.1 206 Partial Content');
header('Content-Range: bytes ' . $offset . '-' . ($offset + $length) . '/' . $size);
}//HEADERS FOR PARTIAL DOWNLOAD FACILITY BEGINS
//USUAL HEADERS FOR DOWNLOAD
header("Content-Disposition: attachment;filename=".$fileName);
header('Content-Type: '.$contentType);
header("Accept-Ranges: bytes");
header("Pragma: public");
header("Expires: -1");
header("Cache-Control: no-cache");
header("Cache-Control: public, must-revalidate, post-check=0, pre-check=0");
header("Content-Length: ".$size);
$chunksize = 8 * (1024 * 1024); //8MB (highest possible fread length)
if ($size > $chunksize)
{
$handle = fopen($_FILES["file"]["tmp_name"], 'rb');
$buffer = '';
while (!feof($handle) && (connection_status() === CONNECTION_NORMAL))
{
$buffer = fread($handle, $chunksize);
print $buffer;
ob_flush();
flush();
}
if(connection_status() !== CONNECTION_NORMAL)
{
echo "Connection aborted";
}
fclose($handle);
}
else
{
ob_clean();
flush();
readfile($filePath);
}
}
else
{
echo 'File does not exist!';
}
}
else
{
echo 'There is no file to download!';
}
}
function is_url_exist($url){
$array = array();
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_NOBODY, true);
curl_exec($ch);
$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
$size = curl_getinfo($ch, CURLINFO_CONTENT_LENGTH_DOWNLOAD);
if($code == 200){
$array['response'] = true;
}else{
$array['response'] = false;
}
$array['size'] = $size;
curl_close($ch);
return $array;
}
allow\u url\u fopen为真吗?如果您只是创建一个这样的页面:echo file_exists[path];结果如何?你应该检查一下你的链接是否是一个真实的.mp4文件。许多下载网站将重新配置他们的web服务器,这样它将提供HTML页面而不是.mp4。这个HTML页面通常会有另一个下载按钮,它会在幕后生成真正的下载链接。@Gerton它不会回应任何东西。我担心的是,托管内容的网站以及传播链接的用户都可能被追究责任。所以,如果你必须在公共场合问一个关于它的问题,也许可以尝试非非法内容。我自己也有一些DMCA方面的问题,所以请将此视为友好的警告。