要从 BIM360 服务下载文件,我使用了自定义Ajax 传输 http://api.jquery.com/jquery.ajaxtransport/jQuery 创建新的 XMLHttpRequest 并将所有接收到的数据传递回 jQuery,请参阅here http://www.henryalgus.com/reading-binary-files-using-jquery-ajax/有关使用 jQuery 进行 Ajax 传输的详细信息。
/**
*
* jquery.binarytransport.js
*
* @description. jQuery ajax transport for making binary data type requests.
* @version 1.0
* @author Henry Algus <[email protected] /cdn-cgi/l/email-protection>
*
*/
// use this transport for "binary" data type
$.ajaxTransport("+binary", function(options, originalOptions, jqXHR) {
// check for conditions and support for blob / arraybuffer response type
if (window.FormData && ((options.dataType && (options.dataType == 'binary')) || (options.data && ((window.ArrayBuffer && options.data instanceof ArrayBuffer) || (window.Blob && options.data instanceof Blob))))) {
return {
// create new XMLHttpRequest
send: function(headers, callback) {
// setup all variables
var xhr = new XMLHttpRequest(),
url = options.url,
type = options.type,
async = options.async || true,
// blob or arraybuffer. Default is blob
dataType = options.responseType || "blob",
data = options.data || null,
username = options.username || null,
password = options.password || null;
xhr.addEventListener('load', function() {
var data = {};
data[options.dataType] = xhr.response;
// make callback and send data
callback(xhr.status, xhr.statusText, data, xhr.getAllResponseHeaders());
});
xhr.open(type, url, async, username, password);
// setup custom headers
for (var i in headers) {
xhr.setRequestHeader(i, headers[i]);
}
xhr.responseType = dataType;
xhr.send(data);
},
abort: function() {
jqXHR.abort();
}
};
}
});
以下代码片段是我用于通过 Forge 数据管理 API 从 BIM360 存储桶下载文件的代码。通过上述自定义 Ajax 传输和dataType: 'binary'
,API 响应将作为 blob 进行处理。之后,我们只需要创建一个 blob URL 和一个临时 HTML 链接来打开 blob URL 来保存下载的文件。
要获取实际的文件存储URL,需要调用API获取项目版本 https://developer.autodesk.com/en/docs/data/v2/reference/http/projects-project_id-items-item_id-versions-GET/,下载链接的值为storage.meta.link.href
API 响应中每个项目版本数据的属性。
$(function() {
$('a#download').click(function(event) {
event.preventDefault();
const filename = '2f536896-88c8-4dee-b0c1-cdeee231a028.zip';
const settings = {
crossDomain: true,
url: 'https://developer.api.autodesk.com/oss/v2/buckets/wip.dm.prod/objects/' + filename,
method: 'GET',
dataType: 'binary',
processData: false,
headers: {
Authorization: 'Bearer YOUR_ACCESS_TOKEN',
Content-Type: 'application/octet-stream'
}
};
$.ajax(settings).done(function (blob, textStatus, jqXHR) {
console.log(blob );
console.log(textStatus);
if( navigator.msSaveBlob )
return navigator.msSaveBlob(blob, filename);
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.style = 'display: none';
document.body.appendChild(a);
a.href = url;
a.download = filename;
a.click();
URL.revokeObjectURL(url);
});
});
})
希望能帮助到你。