break;
}
if(window.navigator.userAgent.indexOf('iphone') > 0 && !!_degree) {
_context.rotate(_degree*Math.PI/180);
_context.drawImage(_img, 0, 0, _tempWidth, _tempHeight);
} else {
_context.drawImage(_img, 0, 0, _tempWidth, _tempHeight);
}
//toDataURL方法，可以获取格式为"data:image/png;base64,***"的base64图片信息；
var _data = _canvas.toDataURL('image/jpeg');
return _data;
}
3.上传图片
/**
* 上传图片到NOS
* @param {Object} _blog Blob格式的图片
* @return {Void}
*/
function uploadPhoto(_data) {
//4.获取canvas中的图片信息
//window.atob方法将其中的base64格式的图片转换成二进制字符串；若将转换后的值直接赋值给Blob会报错，需Uint8Array转换：最后创建Blob对象；
_data = _data.split(',')[1];
_data = window.atob(_data);
//如果不用ArrayBuffer,发送给服务器的图片格式是[object Uint8Array],上传失败...
var _buffer = new ArrayBuffer(_data.length);
var _ubuffer = new Uint8Array(_buffer);
for (var i = 0; i < _data.length; i++) {
_ubuffer[i] = _data.charCodeAt(i);
}
// 安卓 UC浏览器不支持 new Blob()，使用BlobBuilder
var _blob;
try {
_blob = new Blob([_buffer], {type:'image/jpeg'});
} catch(ee) {
window.BlobBuilder = window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder || window.MSBlobBuilder;
if (ee.name == 'TypeError' && window.BlobBuilder) {
var _bb = new BlobBuilder();
_bb.append(_buffer);
_blob = _bb.getBlob('image/jpeg');
}
}
var _suffix = 'jpg';
if(_blob.type === 'image/jpeg') {
_suffix = 'jpg';
}
//获取NOStoken
this.__cache._$requestDWRByGet({url: 'ImageBean.genTokens',param: [_suffix,'','','','1'],onload: function(_tokens) {
_tokens = _tokens || [];
var _token = _tokens[0];
if(!_token || !_token.objectName || !_token.uploadToken){
alert('token获取失败！');
return false;
}
//上传图片到NOS
var _objectName = _token.objectName,
_uploadToken = _token.uploadToken,
_bucketName = _token.bucketName;
var _formData = new FormData();
_formData.append('Object', _objectName);
_formData.append('x-nos-token', _uploadToken);
_formData.append('file',_blob);
var _xhr;
if (window.XMLHttpRequest) {
_xhr = new window.XMLHttpRequest();
} else if (window.ActiveXObject) {
_xhr = new ActiveXObject("Microsoft.XMLHTTP");
}
_xhr.onreadystatechange = function() {
if(_xhr.readyState === 4) {
if((_xhr.status >= 200 && _xhr.status < 300) || _xhr.status === 304) {
var _imgurl = "http://nos.netease.com/" + _bucketName + "/" + _objectName + "?imageView";
var _newUrl = mb.x._$imgResize(_imgurl, 750, 750, 1, true);
window.location.href = 'http://www.lofter.com/act/taxiu?op=effect&originImgUrl=' + _newUrl;
