使用angularjs实现下载文件的功能

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我是靠谱客的博主微笑野狼，最近开发中收集的这篇文章主要介绍使用angularjs实现下载文件的功能，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

sd.downloadServerDetailList = function () {
$http.get(basepath + '/server/ajax/expServers.action', { responseType: 'arraybuffer' })
.success( function(data, status, headers) {

var octetStreamMime = 'application/octet-stream';
var success = false;

// Get the headers
headers = headers();

// Get the filename from the x-filename header or default to "服务列表"
var filename = headers['x-filename'] || '服务列表.csv';

// Determine the content type from the header or default to "application/octet-stream"
var contentType = headers['content-type'] || octetStreamMime;

try
{
// Try using msSaveBlob if supported
console.log("Trying saveBlob method ...");
var blob = new Blob([data], { type: contentType });
if(navigator.msSaveBlob)
navigator.msSaveBlob(blob, filename);
else {
// Try using other saveBlob implementations, if available
var saveBlob = navigator.webkitSaveBlob || navigator.mozSaveBlob || navigator.saveBlob;
if(saveBlob === undefined) throw "Not supported";
saveBlob(blob, filename);
}
console.log("saveBlob succeeded");
success = true;
} catch(ex)
{
console.log("saveBlob method failed with the following exception:");
console.log(ex);
}

if(!success)
{
// Get the blob url creator
var urlCreator = window.URL || window.webkitURL || window.mozURL || window.msURL;
if(urlCreator)
{
// Try to use a download link
var link = document.createElement('a');
if('download' in link)
{
// Try to simulate a click
try
{
// Prepare a blob URL
console.log("Trying download link method with simulated click ...");
var blob = new Blob([data], { type: contentType });
var url = urlCreator.createObjectURL(blob);
link.setAttribute('href', url);

// Set the download attribute (Supported in Chrome 14+ / Firefox 20+)
link.setAttribute("download", filename);

// Simulate clicking the download link
var event = document.createEvent('MouseEvents');
event.initMouseEvent('click', true, true, window, 1, 0, 0, 0, 0, false, false, false, false, 0, null);
link.dispatchEvent(event);
console.log("Download link method with simulated click succeeded");
success = true;

} catch(ex) {
console.log("Download link method with simulated click failed with the following exception:");
console.log(ex);
}
}

if(!success)
{
// Fallback to window.location method
try
{
// Prepare a blob URL
// Use application/octet-stream when using window.location to force download
console.log("Trying download link method with window.location ...");
var blob = new Blob([data], { type: octetStreamMime });
var url = urlCreator.createObjectURL(blob);
window.location = url;
console.log("Download link method with window.location succeeded");
success = true;
} catch(ex) {
console.log("Download link method with window.location failed with the following exception:");
console.log(ex);
}
}

}
}

if(!success)
{
// Fallback to window.open method
console.log("No methods worked for saving the arraybuffer, using last resort window.open");
window.open(httpPath, '_blank', '');
}
})
.error(function(data, status) {
console.log("Request failed with status: " + status);

// Optionally write the error out to scope
$scope.errorDetails = "Request failed with status: " + status;
});
};