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  • asp.net实现大文件分片上传的方法

    前段时间做视频上传业务,通过网页上传视频到服务器。

    视频大小 小则几十M,大则 1G+,以一般的HTTP请求发送数据的方式的话,会遇到的问题:1,文件过大,超出服务端的请求大小限制;2,请求时间过长,请求超时;3,传输中断,必须重新上传导致前功尽弃;

    解决方案:

    1,修改服务端上传的限制配置;Nginx 以及 PHP 的上传文件限制 不宜过大,一般5M 左右为好;

    2,大文件分片,一片一片的传到服务端,再由服务端合并。这么做的好处在于一旦上传失败只是损失一个分片而已,不用整个文件重传,而且每个分片的大小可以控制在4MB以内,服务端限制在4M即可。

    前端使用UP6大文件上传控件

    <div class="section section6 section5">

        <div class="part1"><a href="javascript:;" target="_blank" class="part1__btn">批量删除</a><span class="part1__txt"><em class="part1__num" id="upload_num">0</em>个视频,共 <em class="part1__num" id="upload_size">0M</em></span></div>

        <table class="section5__table">

            <tbody id="thelist">

                <tr class="thead">

                    <th class="col1 allCkeck"><input type="checkbox" name="" class="col1__checkBox"/>视频名称</th><th class="col2">视频大小</th><th class="col3">视频分类</th><th class="col4">状态</th><th class="col5">进度</th><th>操作</th>

                </tr>

            </tbody>

        </table>

        <div class="selFile" id="selFile">

            <div id="drag_tips">

                <div id="btns__add2"></div>

                <h2 class="txt1">选择视频文件</h2>

                <span class="txt2">或直接将文件拖拽至此窗口</span>

            </div>

        </div>

        <div class="btns"><span class="btns__add" id="btns__add">+添加视频文件</span><span class="btns__upload btns__upload-start" id="uploadBtn"><i class="btns__upload_icon"></i>开始上传视频</span></div>

    </div>

    //引入插件

    <script type="text/javascript" src="media/js/lib/webuploader/js/webuploader.min.js"></script>

    upload.js

    1 // 文件上传

    2 jQuery(function() {

    3     var $ = jQuery,

    4         $list = $('#thelist'),

    5         $btn = $('#upload-start'),

    6         $thead = $('.thead'),

    7         $part_btn = $('.part1__btn'), //批量上传按钮

    8         state = 'pending',

    9         fileCount = 0, //上传文件总数

    10         fileSize = 0,//上传文件的总大小

    11     // 上传按钮

    12         $upload = $('#uploadBtn'),

    13     // 所有文件的进度信息,key为file id

    14         percentages = {},

    15     // 所有文件的md5,key为file id

    16         md5Obj = {},

    17     // 可能有pedding, ready, uploading, confirm, done.

    18         state = 'pedding',

    19         uploader;

    20

    21     //浏览器关闭提醒

    22     window.is_confirm = false;

    23     $(window).bind('beforeunload', function(){

    24         // 只有在标识变量is_confirm不为false时,才弹出确认提示

    25         if(window.is_confirm !== false)

    26             return '正在上传视频,该操作将丢失视频,是否继续?';

    27     })

    28

    29     if ( !WebUploader.Uploader.support() ) {

    30         alert( 'Web Uploader 不支持您的浏览器!如果你使用的是IE浏览器,请尝试升级浏览器');

    31         throw new Error( 'WebUploader does not support the browser you are using.' );

    32     }

    33

    34     $(".pop2 .btns__sure").click(function(){

    35         $('.popup,.pop').hide();

    36     });

    37

    38     uploader = WebUploader.create({

    39         //拖拽容器

    40         dnd:'#selFile',

    41

    42         // 不压缩image

    43         resize: false,

    44

    45         // swf文件路径

    46         swf: '/media/js/lib/webuploader/js/Uploader.swf',

    47

    48         // 文件接收服务端。

    49         server: '/service/upload/upload_file',

    50         //server:'http://vod.test.4399sy.com/service/upload/ssl_upload_file',

    51         formData: {

    52             file_id: 'file',

    53             guid:new Date().getTime() + Math.ceil(Math.random()*100),

    54             file_name:''

    55         },

    56

    57         // 选择文件的按钮。可选。

    58         // 内部根据当前运行是创建,可能是input元素,也可能是flash.

    59         pick: {

    60             id:'#btns__add',

    61             innerHTML:"+添加视频文件"

    62         },

    63

    64         // 开起分片上传。

    65         chunked: true,

    66

    67         //如果要分片,分多大一片2M

    68         chunkSize:2*1024*1024,

    69

    70         //上传文件的类型

    71         accept:{

    72             title: 'Videos',

    73             extensions: 'mp4,avi,flv',

    74             mimeTypes: 'video/*'

    75         },

    76         //验证文件总数量, 超出则不允许加入队列。

    77         fileNumLimit: 10,

    78         //单个文件上传的大小限制 2G

    79         fileSingleSizeLimit:2*1024*1024*1024,

    80

    81     });

    82

    83     //添加文件具体函数

    84     function addFile( file ){

    85         var data = new Date(),

    86             month = (data.getMonth()+1)<10 ? '0'+(data.getMonth()+1) : (data.getMonth()+1),

    87             day = data.getDate()<10 ? '0'+ data.getDate(): data.getDate(),

    88             time = data.getFullYear() + "-" + month + "-" + day,

    89             $tr = $('<tr class="toBeUploaded" id="'+file.id+'"></tr>'),

    90             $td = $('<td class="col1"><input type="checkbox" name="" class="col1__checkBox"/><input type="text" value="'+ file.name +'" name="" class="name"/></td><td class="col2">'+convert_size(file.size)+'</td><td class="col3"><select class="class_id">'+ class_options +'</select></td><td class="col4">读取视频中</td><td class="col5">0%</td><td class="col6"><ul><li class="view"><a target="_blank" href="javascript:;">查看</a></li><li class="delete">删除</li></ul></td>').appendTo($tr),

    91             $state = $tr.find('td.col4'),

    92             $prgress = $tr.find('td.col5'),

    93             $delbtn = $tr.find('li.delete');

    94

    95         $("#selFile").hide();

    96

    97         if ( file.getStatus() === 'invalid' ) {

    98             switch( file.statusText ) {

    99                 case 'exceed_size':

    100                     text = '文件大小超出';

    101                     break;

    102

    103                 case 'interrupt':

    104                     text = '上传暂停';

    105                     break;

    106

    107                 default:

    108                     text = '上传失败,请重试';

    109                     break;

    110             }

    111             showError(text);

    112         } else {

    113             // @todo lazyload

    114             percentages[ file.id ] = [ file.size, 0 ];

    115             file.rotation = 0;

    116         }

    117

    118         file.on('statuschange', function( cur, prev ) {

    119             if ( prev === 'progress' ) {

    120                 //上传成功

    121             } else if ( prev === 'queued' ) {

    122                 // 开始上传

    123             }

    124

    125             // 成功

    126             if ( cur === 'error' || cur === 'invalid' ) {

    127                 console.log( file.statusText );

    128                 showError( file.statusText );

    129                 percentages[ file.id ][ 1 ] = 1;

    130             } else if ( cur === 'interrupt' ) {

    131                 showError( 'interrupt' );

    132             } else if ( cur === 'queued' ) {

    133                 percentages[ file.id ][ 1 ] = 0;

    134             } else if ( cur === 'progress' ) {

    135             //   正在上传

    136

    137             } else if ( cur === 'complete' ) {

    138             //   上传完成

    139

    140             }

    141

    142             $tr.removeClass( 'state-' + prev ).addClass( 'state-' + cur );

    143         });

    144         $delbtn.on('click',function(){

    145             uploader.removeFile( file );

    146         });

    147         $tr.appendTo($list);

    148         //$tr.insertAfter($thead);

    149     }

    150

    151     // 负责view的销毁

    152     function removeFile( file ) {

    153         var $tr = $('#'+file.id);

    154

    155         delete percentages[ file.id ];

    156         $tr.off().find('.col6').off().end().remove();

    157     }

    158

    159     function setState( val ) {

    160         var file, stats;

    161

    162         if ( val === state ) {

    163             return;

    164         }

    165

    166         $upload.removeClass( 'state-' + state );

    167         $upload.addClass( 'state-' + val );

    168         state = val;

    169

    170         switch ( state ) {

    171             case 'pedding':

    172                 uploader.refresh();

    173                 break;

    174

    175             case 'ready':

    176                 uploader.refresh();

    177                 break;

    178

    179             case 'uploading':

    180                 $upload.text( '暂停上传' );

    181                 break;

    182             case 'paused':

    183                 $upload.text( '继续上传' );

    184                 break;

    185

    186             case 'confirm':

    187                 //$progress.hide();

    188                 $upload.text( '开始上传' ).addClass( 'disabled' );

    189

    190                 stats = uploader.getStats();

    191                 if ( stats.successNum && !stats.uploadFailNum ) {

    192                     setState( 'finish' );

    193                     return;

    194                 }

    195                 break;

    196             case 'finish':

    197                 stats = uploader.getStats();

    198                 if ( stats.successNum ) {

    199                     alert( '上传成功' );

    200                 } else {

    201                     // 没有成功的图片,重设

    202                     state = 'done';

    203                     location.reload();

    204                 }

    205                 break;

    206         }

    207     }

    208

    209

    210     // 当有文件添加进来的时候

    211     uploader.on( 'fileQueued', function( file ) {

    212         fileCount++;

    213         fileSize += file.size;

    214         $("#upload_num").text(fileCount);

    215         $("#upload_size").text(convert_size(fileSize));

    216         md5Obj[ file.id ] = '';

    217         //获取文件MD5 值

    218         uploader.md5File( file )

    219             // 及时显示进度

    220             .progress(function(percentage) {

    221                 $( '#'+file.id ).find('.col4').text('读取文件'+parseInt(percentage*100)+"%");

    222             })

    223             // 完成

    224             .then(function(val) {

    225             console.log('md5 result:', val);

    226             md5Obj[ file.id ] = val;

    227             $( '#'+file.id ).find('.col4').text('待上传');

    228             setState( 'ready' );

    229         });

    230         addFile( file );

    231     });

    232

    233     // 删除文件

    234     uploader.onFileDequeued = function( file ) {

    235         fileCount--;

    236         fileSize -= file.size;

    237         $("#upload_num").text(fileCount);

    238         $("#upload_size").text(convert_size(fileSize));

    239         if ( !fileCount ) {

    240             setState( 'pedding' );

    241         }

    242         removeFile( file );

    243

    244     };

    245

    246     // 添加“添加文件”的按钮,

    247     uploader.addButton({

    248         id: '#btns__add2',

    249         label: ''

    250     });

    251

    252     // 文件上传过程中创建进度实时显示。

    253     uploader.onUploadProgress = function( file, percentage ) {

    254         var $tr = $('#'+file.id),

    255             $percent = $tr.find('td.col5'),

    256             $state = $tr.find('td.col4');

    257         percentage = parseInt(percentage*100);

    258         if(! (percentage == 0 && percentage == 100)){

    259             $state.text("正在上传");

    260         }

    261         $percent.text( percentage + "%")

    262         percentages[ file.id ][ 1 ] = percentage;

    263     };

    264

    265     //上传前,请求服务端 判断文件是否已经上传过

    266     uploader.on( 'uploadStart', function( file ) {

    267         var type = 'POST';

    268         var url = '/service/upload/determine_video_exist';

    269         var request_data = {

    270             'md5': md5Obj[ file.id ],

    271             'type':1

    272         };

    273         var success = function(r) {

    274             uploader.upload( file );

    275             console.log(r);

    276             if(r.code == 1) {

    277                 uploader.skipFile( file );

    278                 $( '#'+file.id ).find('.col4').text('视频已存在');

    279                 $( '#'+file.id ).find('.col5').text('100%');

    280                 $('#'+file.id).find('.view').find('a').attr('href',playmain +'/?video_id='+ r.data.video_id);

    281                 $('.pop2 .video_game').text("所在游戏:"+r.data.game_name);

    282                 $('.pop2 .create_time').text("上传时间:"+r.data.create_time);

    283                 $('.pop').hide();

    284                 $('.pop2').show();

    285                 $('.popup').show();

    286             }else if(r.code <= 0) {

    287                 showError(r.msg);

    288             }else {

    289

    290             }

    291         };

    292         request(type, url, request_data, success);

    293     });

    294

    295     //当某个文件的分块在发送前触发,主要用来询问是否要添加附带参数,大文件在开起分片上传的前提下此事件可能会触发多次。

    296     uploader.on('uploadBeforeSend', function (obj, data, headers) {

    297         $tr = $("#"+data.id);

    298         var file_name = $tr.find(".name").val();

    299         var class_id = $tr.find("select.class_id").val();

    300         var reg = /[1-9][0-9]*/g;

    301         data.md5 = md5Obj[ obj.file.id ];

    302         data.file_name = file_name;

    303         data.class_id = class_id;

    304         data.guid = data.guid + data.id.replace(/[^0-9]+/g, '');

    305     });

    306

    307     uploader.on( 'uploadSuccess', function( file ,res) {

    308         if(res.code == 1){

    309             $( '#'+file.id ).find('.col4').text('成功上传');

    310             console.log(res);

    311             $('#'+file.id).find('.view').find('a').attr('href',playmain +'/?video_id='+ res.data.video_id);

    312         }else if(res.code == 2) {

    313             $( '#'+file.id ).find('.col4').text('视频已存在');

    314             console.log(res);

    315             $('#'+file.id).find('.view').find('a').attr('href',playmain +'/?video_id='+ res.data.video_id);

    316         }else {

    317             showError(res.msg);

    318         }

    319     });

    320

    321     uploader.on( 'uploadError', function( file,reason ) {

    322         $( '#'+file.id ).find('.col4').text('上传失败');

    323         console.log(reason);

    324     });

    325

    326     uploader.on( 'uploadComplete', function( file ) {

    327         $( '#'+file.id ).find('.progress').fadeOut();

    328     });

    329

    330     uploader.on( 'all', function( type ) {

    331         if ( type === 'startUpload' ) {

    332             state = 'uploading';

    333         } else if ( type === 'stopUpload' ) {

    334             state = 'paused';

    335         } else if ( type === 'uploadFinished' ) {

    336             state = 'done';

    337         }

    338

    339         if ( state === 'uploading' ) {

    340             window.is_confirm = true;

    341             $('.toBeUploaded').addClass("uploaded").removeClass("toBeUploaded");

    342             $('input.name').attr("disabled","disabled");

    343             $('input.col1__checkBox').hide();

    344             $('input').attr("disabled","disabled");

    345             $('select.class_id').attr("disabled","disabled");

    346             $('.btns__add').remove();

    347             $upload.addClass("btns__upload-ing").removeClass("btns__upload-start").html('<i class="btns__upload_icon"></i>正在上传视频');

    348

    349         } else if(state === 'done') {

    350             window.is_confirm = false;

    351             console.log("上传完成");

    352             $upload.addClass("btns__upload-start btns__upload-refresh").removeClass("btns__upload-ing").html('<i class="btns__upload_icon"></i>开始上传视频');

    353         }

    354     });

    355

    356     /**

    357      * 验证文件格式以及文件大小

    358      */

    359     uploader.on("error",function (type){

    360         var msg = ''

    361         switch (type){

    362             case "Q_TYPE_DENIED": msg = "请上传mp4格式文件";break;

    363             case "F_EXCEED_SIZE": msg = "文件大小不能超过1G";break;

    364             case "Q_EXCEED_NUM_LIMIT" : msg = "一次最多能上传10个文件";break;

    365             default: msg='';

    366         }

    367         if(msg != ''){

    368             showError(msg);

    369         }

    370     });

    371

    372     $part_btn.on('click',function(){

    373         $('td .col1__checkBox').each(function(){

    374             if($(this).is(':checked')){

    375                 var $tr = $(this).parents('tr');

    376                 var id = $tr.attr('id');

    377                 uploader.removeFile( id );

    378             }

    379         });

    380     });

    381     $upload.on('click', function() {

    382         var isbreak = false;

    383         $(".name").each(function(){

    384             if(!$(this).val()|| $(this).val() == ''){

    385                 isbreak = true;

    386             }

    387         })

    388         if(isbreak){

    389             showError("文件名不能存在为空");

    390             return;

    391         }

    392         $("select.class_id").each(function(){

    393             if(!$(this).val()|| $(this).val() == ''){

    394                 isbreak = true;

    395             }

    396         })

    397         if(isbreak){

    398             showError("分类不能为空,请先添加分类");

    399             return;

    400         }

    401         if ( $(this).hasClass( 'btns__upload-refresh' ) ) {

    402             location.reload();

    403         }

    404         if ( $(this).hasClass( 'btns__upload-ing' ) ) {

    405             return false;

    406         }

    407         var md5Ready = true;

    408         $.each(md5Obj,function(index,item){

    409             if(!item || item==''){

    410                 md5Ready = false;

    411             }

    412         });

    413         if(!md5Ready){

    414             showError('文件尚未读取完成,请耐心等待');

    415             return false;

    416         }

    417         if ( state === 'ready' && md5Ready ) {

    418             uploader.upload();

    419         } else if ( state === 'paused' ) {

    420             uploader.upload();

    421         } else if ( state === 'uploading' ) {

    422             uploader.stop();

    423         }

    424     });

    425     $upload.addClass( 'state-' + state );

    426

    427 });

    后台(PHP)【仅分片上传相关代码】

      1     public function action_upload_file(){

      2         $file_id = R::string('file_id', 'file');

      3         $keepFileName = R::string('keepFileName', 0);

      4         $unsize_change = R::numeric('unsize_change',0);

      5         $id = R::string('id');   //插件每上传一个视频自带id

      6         $guid = R::string('guid');  //标识视频

      7         $chunks = R::numeric('chunks');  // 分片数

      8         $chunk = R::numeric('chunk');  //分片号

      9         $file_name = R::string('file_name');

     10         $file = isset($_FILES[$file_id])?$_FILES[$file_id]:'';

     11         $md5 = R::string('md5');

     12         $this->upload = new Common_Upload();

     13

     14         if(empty($guid) || empty($file_name) || empty($md5)){

     15             $this->response_msg(-1, 'guid 或 file_name 或 md5 不能为空');

     16             return;

     17         }

     18

     19         if(empty($file['name'])){

     20             $this->response_msg(-1, '请上传一个文件');

     21             return;

     22         }else{

     23             if($chunks){

     24                 $res = $this->upload->saveFile_chunks($file,$chunks, $chunk, $guid);

     25                 if(empty($res)){

     26                     $this->response_msg(-2, '分片上传失败');

     27                     return;

     28                 }

     29

     30             }else if($keepFileName){

     31                 $res = $this->upload->saveFile_nochunks($file, '', '', $keepFileName);

     32             }else{

     33                 $res = $this->upload->saveFile_nochunks($file);

     34             }

     35             if(empty($res)){

     36                 $err = $this->upload->getError();

     37                 $this->response_msg(-3, '上传文件出错!msg:'.print_r($err, true));

     38                 return;

     39             }

     40             if($unsize_change){

     41                 $size = $res['size'];

     42             }else{

     43                 $size = $this->convert_size($res['size']);

     44             }

     45

     46             //视频上传完成

     47             if($chunks && $res['last_chunk']){

     48                 $domain = Kohana::$config->load('domain');

     49                 $video_domain = $domain[RUN_MOD]['VIDEO'];

     50

     51                 if(!empty($file_name)){

     52                     $res['name'] = $file_name;

     53                 }

     54                 $video_data = array(

     55                     'video_name'=> $file_name,

     56                     'video_url'=> $video_domain."/".$res['path'],

     57                     'size'=>$res['size'],

     58                     'create_time'=> date('y-m-d H:i:s',time()),

     59                     'update_time'=> date('y-m-d H:i:s',time()),

     60                     'duration'=> $res['time'],

     61                     'md5'=>$md5

     62                 );

     63                 $video_mod = new Model_Videoinfo();

     64                 $video = $video_mod->save_video($video_data,$guid);

     65                 $res = array(

     66                     'path'=>$res['path'],

     67                     'chunks'=>$chunks,

     68                     'chunk'=>$chunk,

     69                     'size'=>$size,

     70                     'guid'=> $guid,

     71                     'video_id'=>$video[0],

     72                     'file'=>$file,

     73                     'id'=>$id

     74                 );

     75                 $this->response_msg(1,'视频上传成功',$res);

     76                 return;

     77             }

     78             //非分片上传

     79             if(!$chunks){

     80                 $domain = Kohana::$config->load('domain');

     81                 $video_domain = $domain[RUN_MOD]['VIDEO'];

     82                 if(!empty($file_name)){

     83                     $res['name'] = $file_name;

     84                 }

     85                 $video_data = array(

     86                     'video_name'=> $file_name,

     87                     'video_url'=> $video_domain."/".$res['path'],

     88                     'size'=>$res['size'],

     89                     'create_time'=> date('y-m-d H:i:s',time()),

     90                     'update_time'=> date('y-m-d H:i:s',time()),

     91                     'duration'=> $res['time'],

     92                     'md5'=>$md5

     93                 );

     94                 $video_mod = new Model_Videoinfo();

     95                 $video = $video_mod->save_video($video_data,$guid);

     96                 if(empty($video)){

     97                     $this->response_msg(-6, '视频信息保存失败');

     98                     return;

     99                 }

    100                 $res = array(

    101                     'path'=>$res['path'],

    102                     'video_data'=>$video_data,

    103                     'size'=>$size,

    104                     'guid'=> $guid,

    105                     'video_id'=>$video[0],

    106                     'file'=>$file,

    107                     'id'=>$id

    108                 );

    109                 $this->response_msg(1,'视频上传成功',$res);

    110                 return;

    111             }

    112             //分片上传成功(未全部分片上传完成)

    113             $res = array(

    114                 'chunks'=>$chunks,

    115                 'chunk'=>$chunk,

    116             );

    117             $this->response_msg(2, '分片上传成功',$res);

    118         }

    119     }

      1     /**

      2      * 保存分片文件(注意先验证文件是否合法)

      3      *

      4      * @param array $file 单个文件

      5      * @param string $attachdir 上传文件路径

      6      * @param string $upload_type 上传文件类型

      7      * @param bool $keepFileName 是否保持文件名,默认不不保持

      8      * @return bool

      9      */

     10     public function saveFile_chunks($file,$chunks, $chunk, $guid)

     11     {

     12         if(empty($guid) || empty($file) ){

     13             return false;

     14         }

     15         $file_name = (string)$guid . $chunk;

     16         //保存分片文件

     17         $file_info = $this->saveFile($file, '', '', false, $file_name,true);

     18         if ($file_info) {

     19             $cache = Cache::instance('memcache');

     20             //记录已上传的分片编号,上传顺序并不是按编号顺序进行上传

     21             $chunks_list_pre = $cache->get($guid);

     22             if(empty($chunks_list_pre)){

     23                 $strarr = array();

     24                 for($i=0;$i<$chunks;$i++){

     25                     $strarr[] = $guid.$i;

     26                 }

     27                 $cache->set($guid,$strarr,60 * 60 * 24);

     28             }

     29             $file_path = $cache->set($guid.$chunk,$file_info['path'],60 * 60 * 24);

     30

     31             $chunk_path_array= array();

     32             for($i=0;$i<$chunks;$i++){

     33                 if($cache->get($guid.$i)){

     34                     $chunk_path_array[$i] = $cache->get($guid.$i);

     35                 }

     36             }

     37             list($Y,$M,$D,$H,$I,$S) = explode('-',date("Y-m-d-H-i-s", time()));

     38             $file_info['chunks_path_count'] = count($chunk_path_array);

     39             $file_info['last_chunk'] = false;

     40             if (count($chunk_path_array) == $chunks) {

     41                 //按目录类型存储

     42                 $dirType = substr($file_info['type'], 1, strlen($file_info['type']));;

     43                 //目录类型前面加上前缀url

     44                 $dirType = $this->pre_url.$dirType;

     45                 //按年月二级存储

     46                 $month_file_path = $Y.'/'.$M;

     47                 $saveName ='upload/mp4/'.$month_file_path.'/original/'.$guid.$file_info['type'];

     48                 $join_file_name =$this->attachDIR.$saveName;

     49                 if(!is_dir($this->attachDIR.'upload/mp4/'.$month_file_path.'/original/')){

     50                     mkdir($this->attachDIR.'upload/mp4/'.$month_file_path.'/original/',0755,true);

     51                 }

     52                 if(! file_exists($join_file_name)){

     53                     $fp = fopen($join_file_name, "ab");

     54                     //合并过程中对文件加锁,防止同时操作而出错

     55                     if (flock($fp,LOCK_EX)){

     56                         for ($i = 0; $i < $chunks; $i++) {

     57                                 $tmp_file = $this->attachDIR . $chunk_path_array[$i];

     58                                 $handle = fopen($tmp_file, "rb");

     59                                 fwrite($fp, fread($handle, filesize($tmp_file)));

     60                                 fclose($handle);

     61                                 unset($handle);

     62                                 unlink($tmp_file);//合并完毕的文件就删除

     63                         }//组装分片

     64                         $cache->delete($guid);

     65                         for($i=0;$i<$chunks;$i++){

     66                             $cache->delete($guid.$i);

     67                         }

     68                         $time = $this->getTime($join_file_name,$file_info['type']);

     69                         $file_info['time'] = $time;

     70                         $file_info['path'] = $saveName;

     71                         $file_info['size'] = filesize($join_file_name);

     72                         $file_info['last_chunk'] = true;

     73

     74                         $model_mod = new Model_Base();

     75                         $model_mod->disconnect();

     76                         $pid = pcntl_fork();

     77                         //父进程和子进程都会执行下面代码

     78                         if ($pid == -1) {

     79                             //错误处理:创建子进程失败时返回-1.

     80                             die('could not fork');

     81                         } else if ($pid) {

     82                             $model_mod->connect();

     83                             //对上传完成的视频进行排队转码

     84                             $this->thread($join_file_name,$file_info['type'],$guid);

     85                             //父进程会得到子进程号,所以这里是父进程执行的逻辑

     86                             pcntl_wait($status); //等待子进程中断,防止子进程成为僵尸进程。

     87                         } else {

     88                             return $file_info;

     89                             //子进程得到的$pid为0, 所以这里是子进程执行的逻辑。

     90                         }

     91

     92                     }

     93                 }

     94

     95             }

     96             return $file_info;

     97         } else {

     98                 $this->error[] = '分片上传失败';

     99                 return false;

    100         }

    101             /*}}}*/

    102         }

    1,实现了分片上传;

    2,同时在上传前检查视频md5 是否在库,如已存在可实现“秒传” 功能,即直接复制数据信息,指向同一个文件,不必再上传;

    3,可实现断点续传,上传过程中中断;之前上传的分片已保留在服务器,只需重新上传尚未上传的分片即可;

    参考文章:http://blog.ncmem.com/wordpress/2019/08/12/java-http%E5%A4%A7%E6%96%87%E4%BB%B6%E6%96%AD%E7%82%B9%E7%BB%AD%E4%BC%A0%E4%B8%8A%E4%BC%A0/ 
    欢迎入群一起讨论:374992201

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  • 原文地址:https://www.cnblogs.com/songsu/p/14522587.html
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