15 lines
4.6 KiB
JavaScript
15 lines
4.6 KiB
JavaScript
/* Socket IO File Upload Client-Side Library
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* Copyright (C) 2015 Shane Carr and others
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* Released under the X11 License
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* For more information, visit: https://github.com/vote539/socketio-file-upload
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*/
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(function(g,d,f){"function"===typeof define&&define.amd?define(d,f):"object"===typeof module&&module.exports?module.exports=f():g[d]=f()})(this,"SocketIOFileUpload",function(){return function(g){var d=this;if(!window.File||!window.FileReader)throw Error("Socket.IO File Upload: Browser Not Supported");var f={},q=[],u=[],k={};d.fileInputElementId="siofu_input";d.resetFileInputs=!0;d.useText=!1;d.serializedOctets=!1;d.useBuffer=!0;d.chunkSize=102400;d.chunkDelay=0;var r=function(a,b){var c=document.createEvent("Event");
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c.initEvent(a,!1,!1);for(var y in b)b.hasOwnProperty(y)&&(c[y]=b[y]);return d.dispatchEvent(c)},p=[],e=function(a,b,c,d){a.addEventListener(b,c,d);p.push(arguments)},t=function(a,b,c,d){a.removeEventListener&&a.removeEventListener(b,c,d)},z=function(){for(var a=p.length-1;0<=a;a--)t.apply(this,p[a]);p=[]},A=function(a){if(null!==d.maxFileSize&&a.size>d.maxFileSize)r("error",{file:a,message:"Attempt by client to upload file exceeding the maximum file size",code:1});else if(r("start",{file:a})){var b=
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new FileReader,c=q.length,f=d.useText,v=0,k;b._realReader&&(b=b._realReader);q.push(a);var p={id:c},w=d.chunkSize;if(w>=a.size||0>=w)w=a.size;var x=function(){if(!p.abort){var c=a.slice(v,Math.min(v+w,a.size));f?b.readAsText(c):b.readAsArrayBuffer(c)}},l=function(e){if(!p.abort){var l=Math.min(v+w,a.size);a:{var q=v;e=e.target.result;var u=!1;if(!f)try{var m=new Uint8Array(e);if(d.serializedOctets)e=m;else if(d.useBuffer)e=m.buffer;else{var u=!0,n,t=m.buffer.byteLength,h="";for(n=0;n<t;n+=3)h+="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"[m[n]>>
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2],h+="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"[(m[n]&3)<<4|m[n+1]>>4],h+="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"[(m[n+1]&15)<<2|m[n+2]>>6],h+="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"[m[n+2]&63];2===t%3?h=h.substring(0,h.length-1)+"=":1===t%3&&(h=h.substring(0,h.length-2)+"==");e=h}}catch(z){g.emit("siofu_done",{id:c,interrupt:!0});break a}g.emit("siofu_progress",{id:c,size:a.size,start:q,end:l,content:e,base64:u})}r("progress",
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{file:a,bytesLoaded:l,name:k});v+=w;v<a.size?setTimeout(x,d.chunkDelay):(g.emit("siofu_done",{id:c}),r("load",{file:a,reader:b,name:k}))}};e(b,"load",l);e(b,"error",function(){g.emit("siofu_done",{id:c,interrupt:!0});t(b,"load",l)});e(b,"abort",function(){g.emit("siofu_done",{id:c,interrupt:!0});t(b,"load",l)});g.emit("siofu_start",{name:a.name,mtime:a.lastModified,meta:a.meta,size:a.size,encoding:f?"text":"octet",id:c});u.push(function(a){k=a;x()});return p}},x=function(a){if(0!==a.length){for(var b=
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0;b<a.length;b++)a[b].meta||(a[b].meta={});if(r("choose",{files:a}))for(b=0;b<a.length;b++){var c=A(a[b]);k[c.id]=c}}},l=function(a){var b=a.target.files||a.dataTransfer.files;a.preventDefault();x(b);if(d.resetFileInputs){try{a.target.value=""}catch(e){}if(a.target.value){var b=document.createElement("form"),c=a.target.parentNode,f=a.target.nextSibling;b.appendChild(a.target);b.reset();c.insertBefore(a.target,f)}}};this.submitFiles=function(a){a&&x(a)};this.listenOnSubmit=function(a,b){b.files&&e(a,
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"click",function(){x(b.files)},!1)};this.listenOnArraySubmit=function(a,b){for(var c in b)this.listenOnSubmit(a,b[c])};this.listenOnInput=function(a){a.files&&e(a,"change",l,!1)};this.listenOnDrop=function(a){e(a,"dragover",function(a){a.preventDefault()},!1);e(a,"drop",l)};this.prompt=function(){var a;a=document.getElementById(d.fileInputElementId);a||(a=document.createElement("input"),a.setAttribute("type","file"),a.setAttribute("id",d.fileInputElementId),a.style.display="none",document.body.appendChild(a));
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e(a,"change",l,!1);var b=document.createEvent("MouseEvents");b.initMouseEvent("click",!0,!0,window,0,0,0,0,0,!1,!1,!1,!1,0,null);a.dispatchEvent(b)};this.destroy=function(){z();var a=document.getElementById(d.fileInputElementId);a&&a.parentNode.removeChild(a);for(var b in k)k.hasOwnProperty(b)&&(k[b].abort=!0);k=u=q=f=null};this.addEventListener=function(a,b){f[a]||(f[a]=[]);f[a].push(b)};this.removeEventListener=function(a,b){if(!f[a])return!1;for(var c=0;c<f[a].length;c++)if(f[a][c]===b)return f[a].splice(c,
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1),!0;return!1};this.dispatchEvent=function(a){var b=f[a.type];if(!b)return!0;for(var c=!0,d=0;d<b.length;d++)!1===b[d](a)&&(c=!1);return c};e(g,"siofu_ready",function(a){u[a.id](a.name)});e(g,"siofu_complete",function(a){r("complete",{file:q[a.id],detail:a.detail,success:a.success})});e(g,"siofu_error",function(a){r("error",{file:q[a.id],message:a.message,code:0});k[a.id].abort=!0})}});
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