{"json_modified": "2014-03-25T18:22:27.998185", "slug": "DOM/BlobBuilder", "tags": [], "locale": "zh-CN", "title": "BlobBuilder", "translations": [{"locale": "en-US", "url": "/en-US/docs/Web/API/BlobBuilder", "last_edit": "2013-09-18T17:21:42", "title": "BlobBuilder"}], "modified": "2014-03-25T18:22:27", "label": "BlobBuilder", "url": "/zh-CN/docs/DOM/BlobBuilder", "last_edit": "2012-12-25T22:58:54", "summary": "The <code>BlobBuilder</code> interface provides an easy way to construct <a href=\"/zh-CN/docs/DOM/Blob\" title=\"&#x4E00;&#x4E2A;Blob&#x5BF9;&#x8C61;&#x5C31;&#x662F;&#x4E00;&#x4E2A;&#x5305;&#x542B;&#x6709;&#x53EA;&#x8BFB;&#x539F;&#x59CB;&#x6570;&#x636E;&#x7684;&#x7C7B;&#x6587;&#x4EF6;&#x5BF9;&#x8C61;.Blob&#x5BF9;&#x8C61;&#x4E2D;&#x7684;&#x6570;&#x636E;&#x5E76;&#x4E0D;&#x4E00;&#x5B9A;&#x5F97;&#x662F;JavaScript&#x4E2D;&#x7684;&#x539F;&#x751F;&#x5F62;&#x5F0F;.File&#x63A5;&#x53E3;&#x57FA;&#x4E8E;Blob,&#x7EE7;&#x627F;&#x4E86;Blob&#x7684;&#x529F;&#x80FD;,&#x5E76;&#x4E14;&#x6269;&#x5C55;&#x652F;&#x6301;&#x4E86;&#x7528;&#x6237;&#x8BA1;&#x7B97;&#x673A;&#x4E0A;&#x7684;&#x672C;&#x5730;&#x6587;&#x4EF6;.\"><code>Blob</code></a> objects. Just create a <code>BlobBuilder</code> and append chunks of data to it by calling the <code><a href=\"https://developer.mozilla.org/zh-CN/docs/DOM/BlobBuilder#append()\">append()</a></code> method. When you're done building your blob, call <code><a href=\"https://developer.mozilla.org/zh-CN/docs/DOM/BlobBuilder#getBlob()\">getBlob()</a></code> to retrieve a <a href=\"/zh-CN/docs/DOM/Blob\" title=\"&#x4E00;&#x4E2A;Blob&#x5BF9;&#x8C61;&#x5C31;&#x662F;&#x4E00;&#x4E2A;&#x5305;&#x542B;&#x6709;&#x53EA;&#x8BFB;&#x539F;&#x59CB;&#x6570;&#x636E;&#x7684;&#x7C7B;&#x6587;&#x4EF6;&#x5BF9;&#x8C61;.Blob&#x5BF9;&#x8C61;&#x4E2D;&#x7684;&#x6570;&#x636E;&#x5E76;&#x4E0D;&#x4E00;&#x5B9A;&#x5F97;&#x662F;JavaScript&#x4E2D;&#x7684;&#x539F;&#x751F;&#x5F62;&#x5F0F;.File&#x63A5;&#x53E3;&#x57FA;&#x4E8E;Blob,&#x7EE7;&#x627F;&#x4E86;Blob&#x7684;&#x529F;&#x80FD;,&#x5E76;&#x4E14;&#x6269;&#x5C55;&#x652F;&#x6301;&#x4E86;&#x7528;&#x6237;&#x8BA1;&#x7B97;&#x673A;&#x4E0A;&#x7684;&#x672C;&#x5730;&#x6587;&#x4EF6;.\"><code>Blob</code></a> containing the data you sent into the blob builder.", "sections": [{"id": "Method_overview", "title": "\u65b9\u6cd5\u6982\u8ff0"}, {"id": ".E6.96.B9.E6.B3.95", "title": "\u65b9\u6cd5"}, {"id": "append()", "title": "append()"}, {"id": ".E5.8F.82.E6.95.B0", "title": "\u53c2\u6570"}, {"id": "getBlob()", "title": "getBlob()"}, {"id": ".E5.8F.82.E6.95.B0_2", "title": "\u53c2\u6570"}, {"id": ".E8.BF.94.E5.9B.9E.E5.80.BC", "title": "\u8fd4\u56de\u503c"}, {"id": "getFile()__", "title": "getFile()"}, {"id": ".E5.8F.82.E6.95.B0_3", "title": "\u53c2\u6570"}, {"id": ".E8.BF.94.E5.9B.9E.E5.80.BC_2", "title": "\u8fd4\u56de\u503c"}, {"id": ".E6.B5.8F.E8.A7.88.E5.99.A8.E5.85.BC.E5.AE.B9.E6.80.A7", "title": "\u6d4f\u89c8\u5668\u517c\u5bb9\u6027"}, {"id": ".E6.B3.A8.3ABlobBuilder.E5.B7.B2.E8.A2.AB.E5.BA.9F.E5.BC.83", "title": "\u6ce8:BlobBuilder\u5df2\u88ab\u5e9f\u5f03"}, {"id": ".E7.9B.B8.E5.85.B3.E9.93.BE.E6.8E.A5", "title": "\u76f8\u5173\u94fe\u63a5"}], "id": 59331, "review_tags": []}