【发布时间】:2015-10-28 04:28:11
【问题描述】:
我正在使用 ngCropImage 裁剪图像并希望通过this 链接上传它:
NgCropImage 指令返回图像的 dataURI,我将其转换为 blob(转换后我得到一个 blob 对象:具有大小和类型),使用以下代码将 DataURI 转换为 blob:
/*html*/
<img-crop image="myImage" result-image="myCroppedImage" result-image-size="250"></img-crop>
$scope.myImage='';
$scope.myCroppedImage = {image: ''}
var blob;
//called when user crops
var handleFileSelect=function(evt) {
var file=evt.currentTarget.files[0];
var reader = new FileReader();
reader.onload = function (evt) {
$scope.$apply(function($scope){
$scope.myImage=evt.target.result;
});
};
console.log($scope.myCroppedImage)
reader.readAsDataURL(file);
var link = document.createElement('link');
blob = dataURItoBlob($scope.myCroppedImage)
console.log(blob)
};
angular.element(document.querySelector('#fileInput')).on('change',handleFileSelect);
function dataURItoBlob(dataURI) {
// convert base64/URLEncoded data component to raw binary data held in a string
var binary = atob(dataURI.split(',')[1]);
var mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0];
var array = [];
for(var i = 0; i < binary.length; i++) {
array.push(binary.charCodeAt(i));
}
return new Blob([new Uint8Array(array)], {type: mimeString});
}
$scope.upload = function(file) {
//var file = new File(file, "filename");
// Configure The S3 Object
console.log($scope.creds)
AWS.config.update({ accessKeyId: $.trim($scope.creds.access_key), secretAccessKey: $.trim($scope.creds.secret_key) });
AWS.config.region = 'us-east-1';
var bucket = new AWS.S3({ params: { Bucket: $.trim($scope.creds.bucket) } });
if(file) {
//file.name = 'abc';
var uniqueFileName = $scope.uniqueString() + '-' + file.name;
var params = { Key: file.name , ContentType: file.type, Body: file, ServerSideEncryption: 'AES256' };
bucket.putObject(params, function(err, data) {
if(err) {
// There Was An Error With Your S3 Config
alert(err.message);
return false;
}
else {
// Success!
alert('Upload Done');
}
})
.on('httpUploadProgress',function(progress) {
// Log Progress Information
console.log(Math.round(progress.loaded / progress.total * 100) + '% done');
});
}
else {
// No File Selected
alert('No File Selected');
}
}
$scope.uniqueString = function() {
var text = "";
var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
for( var i=0; i < 8; i++ ) {
text += possible.charAt(Math.floor(Math.random() * possible.length));
}
return text;
}
//for uploading
$scope.handleSave = function(){
$scope.upload(blob);
}
现在,我想使用 this 在 S3 上上传此 blob,但我无法弄清楚如何将此 blob 文件上传到 s3(因为我没有在 blob 文件中获取“名称”)
任何帮助将不胜感激。谢谢
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