php curl从url获取文件内容，强制下载文件返回错误“；来自服务器的空回复”； - php curl get file content from url which forces to download file returns error "Empty reply from server"

php curl get file content from url which forces to download file returns error "Empty reply from server"

我正在尝试从URL加载文件内容，该URL强制下载具有标头的文件内容类型：application/octet流

返回错误"来自服务器的空回复"的代码：

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'http://urltofile.com/file.csv');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
if(!$file = curl_exec($ch)) {
    echo curl_error($ch);
}
curl_close($ch);
echo $file;

几个小时后我找到了解决方案！

使用CURL发送自定义标头和用户代理可以解决此问题！

$ch = curl_init();
$agent="Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3";
$header=[];
$header[]="Accept: text/xml,text/csv,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5"; 
$header[]="Connection: keep-alive"; 
$header[]="Keep-Alive: 300"; 
curl_setopt($ch, CURLOPT_HTTPHEADER, $header); 
curl_setopt($ch, CURLOPT_URL, 'http://urltofile.com/file.csv');
curl_setopt($ch, CURLOPT_USERAGENT, $agent); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
if(!$file = curl_exec($ch)) {
    echo curl_error($ch);
}
curl_close($ch);
echo $file;

我希望这能帮助到别人！：）