Created
December 28, 2012 09:56
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xhr2でバイナリデータを送信するの続編。今回はBlobで送ります。ArrayBufferはおそらくサイズを途中で伸ばしたり、縮めたりできないので、インプットの大きさが分からない場合はBlobを使って送ればできるようです。サーバー側は https://gist.github.com/4394635 を参照してください。
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| <html> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html;charset=utf-8" > | |
| <title>xhr2 test</title> | |
| <body> | |
| <input type="text" id="input"/> | |
| <button id="send">send</button> | |
| <script> | |
| var inputEL = document.getElementById('input'); | |
| document.getElementById('send').addEventListener('click', function(e) { | |
| var inputs = inputEL.value.split(','); | |
| if(isNaN(parseInt(inputs[0]))) return; | |
| var bufs = []; | |
| var v, buf; | |
| for(var i = 0; v = inputs[i]; i++) { | |
| buf = new ArrayBuffer(1); | |
| dv = new DataView(buf); | |
| dv.setUint8(0, parseInt(v)); | |
| bufs.push(buf); | |
| } | |
| var views = []; | |
| for(var i = 0; bufs[i]; i++) { | |
| views.push(new Uint8Array(bufs[i])); | |
| } | |
| var xhr = new XMLHttpRequest(); | |
| xhr.open('POST', '/send', true); | |
| xhr.responseType = 'arraybuffer'; | |
| xhr.onload = function(e) { | |
| var dv; | |
| if(this.status == 200) { | |
| var txtArea = document.createElement('textarea'); | |
| var dv = new DataView(this.response); | |
| var txt = '('; | |
| var size = this.response.byteLength; | |
| for(var i = 0; i < size; i++) { | |
| txt += dv.getUint8(i) | |
| if(i == size - 1) txt += ')'; | |
| else txt += ','; | |
| } | |
| txtArea.value = txt; | |
| document.body.appendChild(txtArea); | |
| } else { | |
| console.log(this.status); | |
| } | |
| }; | |
| xhr.send(new Blob(views, {type: 'application/octet-stream'})); | |
| }, false); | |
| </script> | |
| </body> | |
| </html> |
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