PHP cURL - 获取剩余的下载时间 [英] PHP cURL - Get remaining time of download

问题描述

我要让我的用户使用远程上传功能直接从我的服务器上下载内容（例如）自己的服务器，而不是本地上传。为此，我使用cURL。现在我想得到余下的时间cURL需要完成下载（比特率也会很好）。

有一种方法我可以返回剩余时间cURL需要通过PHP curl模块完成下载，或者我需要运行命令行界面，并以某种方式将输出放在一个文件中，然后从那里读取（因为PHP阻止执行时使用 shell_exec（）或 exec（））？

以及已下载的curl数量。这是相关的代码：

  function write_progress（$ ch，$ original_size，$ current_size，$ os_up，$ cs_up） {
 global $ anitube，$ cache; 
 
 $ cache-> write（webupload-progress  - 。$ anitube-> input ['inputname']，serialize（array（total=> $ original_size，loaded => $ current_size）））; 
} 
 
 ini_set（'max_execution_time'，'0'）; 
 $ handle_file =/tmp/file-\".$anitube->generate(20).\".tmp; 
 if（DIRECTORY_SEPARATOR ==\\）{
 $ handle_file = IN_DIR。$ handle_file; 
} 
 
 $ file = fopen（$ handle_file，w +）; 
 $ ch = curl_init（）; 
 curl_setopt（$ ch，CURLOPT_URL，urldecode（trim（$ anitube-> input ['filename']）））; 
 curl_setopt（$ ch，CURLOPT_FILE，$ file）; 
 curl_setopt（$ ch，CURLOPT_CONNECTTIMEOUT，5）; 
 curl_setopt（$ ch，CURLOPT_USERAGENT，$ _SERVER ['HTTP_USER_AGENT']）; 
 curl_setopt（$ ch，CURLOPT_NOPROGRESS，false）; 
 curl_setopt（$ ch，CURLOPT_PROGRESSFUNCTION，write_progress）; 
 if（$ anitube-> users ['ip'] ==127.0.0.1）{
 curl_setopt（$ ch，CURLOPT_SSL_VERIFYPEER，0）; 
 curl_setopt（$ ch，CURLOPT_SSL_VERIFYHOST，0）; 
} 
 
 $ data = curl_exec（$ ch）; 
 if（curl_errno（$ ch）> 0）{
 file_put_contents（IN_DIR。/ logs / curl_errors.txt，date（dmY H：i：s）。 -  Errno： .curl_errno（$ ch）。 - 错误：.curl_error（$ ch）。 -  cURL 4：.print_r（curl_getinfo（$ ch），true）\\\
，FILE_APPEND）; 
 die（json_encode（array（success=> 0，response=> $ language-> word（'remote_file_not_available'）））））; 
} elseif（curl_getinfo（$ ch，CURLINFO_HTTP_CODE）！= 200）{
 file_put_contents（IN_DIR。/ logs / curl_errors.txt，date（dmY H：i：s）。错误：连接被拒绝 -  HTTP响应代码：.curl_getinfo（$ ch，CURLINFO_HTTP_CODE）。 -  cURL 4：.print_r（curl_getinfo（$ ch），true）\\\
，FILE_APPEND）; 
 die（json_encode（array（success=> 0，response=> $ language-> word（'remote_file_not_available'）））））; 
} 
 
 curl_close（$ ch）; 
 fclose（$ file）; PHP的cURL库似乎没有提供估计的时间。   剩下的，但是使用 CURLOPT_PROGRESSFUNCTION 回调函数从PHP计算它是相当微不足道。我在下面创建了一个工作示例。请注意，如果启用了GZIP压缩，则输出可能会延迟到整个请求完成。
 
 
 
示例：
 
 
 
 <？php 
 
 header（'Content-Type：text / plain'）; 
 
 //帮助函数刷新输出缓冲区。 
 function flush_all（）{
 while（ob_get_level（））{
 ob_end_flush（）; 
} 
 flush（）; 
} 
 
 $ download_start_time = null; 
 function write_progress（$ ch，$ original_size，$ current_size，$ os_up，$ cs_up）{
 global $ download_start_time; 
 //获取当前时间。 
 $ now = microtime（true）; 
 //记住开始时间。 
 if（！$ download_start_time）{
 $ download_start_time = $ now; 
} 
 //检查下载大小是否可用。 
 if（$ original_size）{
 //计算转移所花费的时间。 
 $ transfer_time = $ now  -  $ download_start_time; 
 //计算已下载的百分比。 
 $ transfer_percentage = $ current_size / $ original_size; 
 //计算估计的传输时间。 
 $ estimated_tranfer_time = $ transfer_time / $ transfer_percentage; 
 //计算剩余估计时间。 
 $ estimated_time_remaining = $ estimated_tranfer_time  -  $ transfer_time; 
 //输出剩余时间。 
 var_dump（$ estimated_time_remaining）; 
 flush_all（）; 
} 
} 
 
 //用法示例。 
 $ file = fopen（'tmp.bin'，w +）; 
 $ ch = curl_init（）; 
 curl_setopt（$ ch，CURLOPT_URL，'https://ftp.mozilla.org/pub/mozilla.org/firefox/releases/35.0.1/win32/en-US/Firefox%20Setup%2035.0.1。可执行程序' ）; 
 curl_setopt（$ ch，CURLOPT_FILE，$ file）; 
 curl_setopt（$ ch，CURLOPT_NOPROGRESS，false）; 
 curl_setopt（$ ch，CURLOPT_PROGRESSFUNCTION，'write_progress'）; 
 $ data = curl_exec（$ ch）; 
  
 
I am offering my users to use remote-upload to download the content directly on my server from (for example) their own server instead of local uploads. For that I'm using cURL. And now I want to get the remaining time cURL needs to complete the download (bitrate would be fine too).

Is there a way I can return the remaining time cURL needs to finish the download via the PHP curl module or do I need to run the command-line interface and somehow put the output in a file and then read from there (since PHP blocks execution when using shell_exec() or exec())?

I'm already getting the bytes expected to download and how many curl already downloaded. This is the associated code as far:
function write_progress($ch, $original_size, $current_size, $os_up, $cs_up) {
    global $anitube, $cache;

    $cache->write("webupload-progress-".$anitube->input['inputname'], serialize(array("total" => $original_size, "loaded" => $current_size)));
}

ini_set('max_execution_time', '0');
$handle_file = "/tmp/file-".$anitube->generate(20).".tmp";
if(DIRECTORY_SEPARATOR == "\\") {
    $handle_file = IN_DIR.$handle_file;
}

$file = fopen($handle_file, "w+");
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, urldecode(trim($anitube->input['filename'])));
curl_setopt($ch, CURLOPT_FILE, $file);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
curl_setopt($ch, CURLOPT_NOPROGRESS, false);
curl_setopt($ch, CURLOPT_PROGRESSFUNCTION, "write_progress");
if($anitube->users['ip'] == "127.0.0.1") {
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
}

$data = curl_exec($ch);
if(curl_errno($ch) > 0) {
    file_put_contents(IN_DIR."/logs/curl_errors.txt", date("d.m.Y H:i:s")." - Errno: ".curl_errno($ch)." - Error: ".curl_error($ch)." -  cURL 4: ".print_r(curl_getinfo($ch), true)."\n", FILE_APPEND);
    die(json_encode(array("success" => 0, "response" => $language->word('remote_file_not_available'))));
} elseif(curl_getinfo($ch, CURLINFO_HTTP_CODE) != 200) {
    file_put_contents(IN_DIR."/logs/curl_errors.txt", date("d.m.Y H:i:s")." - Error: Connection denied - HTTP-Response-Code: ".curl_getinfo($ch, CURLINFO_HTTP_CODE)." -  cURL 4: ".print_r(curl_getinfo($ch), true)."\n", FILE_APPEND);
    die(json_encode(array("success" => 0, "response" => $language->word('remote_file_not_available'))));
}

curl_close($ch);
fclose($file);

解决方案
PHP's cURL library does not appear to provide the estimated time remaining, but it is fairly trivial to calculate this from PHP using the CURLOPT_PROGRESSFUNCTION callback function. I've created a working example below. Note that if GZIP compression is enabled, the output will probably be delayed until the entire request is complete.

Example:

<?php

header( 'Content-Type: text/plain' );

//A helper function to flush output buffers.
function flush_all() {
    while ( ob_get_level() ) {
        ob_end_flush();
    }
    flush();
}

$download_start_time = null;
function write_progress( $ch, $original_size, $current_size, $os_up, $cs_up ) {
    global $download_start_time;
    //Get the current time.
    $now = microtime( true );
    //Remember the start time.
    if ( ! $download_start_time ) {
        $download_start_time = $now;
    }
    //Check if the download size is available yet.
    if ( $original_size ) {
        //Compute time spent transfering.
        $transfer_time = $now - $download_start_time;
        //Compute percent already downloaded.
        $transfer_percentage = $current_size / $original_size;
        //Compute estimated transfer time.
        $estimated_tranfer_time = $transfer_time / $transfer_percentage;
        //Compute estimated time remaining.
        $estimated_time_remaining = $estimated_tranfer_time - $transfer_time;
        //Output the remaining time.
        var_dump( $estimated_time_remaining );
        flush_all();
    }
}

//Example usage.
$file = fopen( 'tmp.bin', "w+");
$ch = curl_init();
curl_setopt( $ch, CURLOPT_URL, 'https://ftp.mozilla.org/pub/mozilla.org/firefox/releases/35.0.1/win32/en-US/Firefox%20Setup%2035.0.1.exe' );
curl_setopt( $ch, CURLOPT_FILE, $file );
curl_setopt( $ch, CURLOPT_NOPROGRESS, false );
curl_setopt( $ch, CURLOPT_PROGRESSFUNCTION, 'write_progress' );
$data = curl_exec( $ch );


                        
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