摘要:);/) [1]; letbstr=atob;letn=bstr长度;letu8arr=newUint8Array;虽然(n-){u8arr[n]=bstr.charCodeAt;}try{returnnewFile;}catch{/**与iOS9.3或Android 4.4版本兼容*/console.warn;returnthis.dataURL2blob;}},/**数据URL转换为blob*@paramdataURL*@returnblob*/dataURL2blob{letbinaryString=atob;letarrayBuffer=newArrayBuffer;letntArray=newUint8Array;letmime=dataURL.split(“,”)[0].match(/:(.*?
this.compress(result, 800, 0.5).then(val => {
//得到压缩图片
let data = val;
that.file = that.dataURLtoFile(data, that.file_name);
//上传
that.upload();
});
// 压缩图片
compress(base64String, w, quality) {
// var getMimeType = function(urlData) {
// var arr = urlData.split(",");
// var mime = arr[0].match(/:(.*?);/)[1];
// // return mime.replace("image/", "");
// return mime;
// };
var newImage = new Image();
var imgWidth, imgHeight;
var promise = new Promise(resolve => (newImage.onload = resolve));
newImage.src = base64String;
return promise.then(() => {
imgWidth = newImage.width;
imgHeight = newImage.height;
var canvas = document.createElement("canvas");
var ctx = canvas.getContext("2d");
if (Math.max(imgWidth, imgHeight) > w) {
if (imgWidth > imgHeight) {
canvas.width = w;
canvas.height = (w * imgHeight) / imgWidth;
} else {
canvas.height = w;
canvas.width = (w * imgWidth) / imgHeight;
}
} else {
canvas.width = imgWidth;
canvas.height = imgHeight;
}
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.drawImage(newImage, 0, 0, canvas.width, canvas.height);
// var base64 = canvas.toDataURL(getMimeType(base64String), quality);
var base64 = canvas.toDataURL("image/jpeg", quality);
console.log(base64);
return base64;
});
}
dataURLtoFile(dataurl, filename) {
let arr = dataurl.split(",");
let mime = arr[0].match(/:(.*?);/)[1];
let bstr = atob(arr[1]);
let n = bstr.length;
let u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
try {
return new File([u8arr], filename, { type: mime });
} catch (err) {
/**兼容iOS9.3或者Android4.4以下版本*/
console.warn(
"Browser does not support the File constructor,Will use blob instead of file"
);
return this.dataURL2blob(dataurl);
}
},
/**
* dataURL 转成 blob
* @param dataURL
* @return blob
*/
dataURL2blob(dataURL) {
let binaryString = atob(dataURL.split(",")[1]);
let arrayBuffer = new ArrayBuffer(binaryString.length);
let intArray = new Uint8Array(arrayBuffer);
let mime = dataURL.split(",")[0].match(/:(.*?);/)[1];
for (let i = 0, j = binaryString.length; i < j; i++) {
intArray[i] = binaryString.charCodeAt(i);
}
let data = [intArray];
let result;
try {
result = new Blob(data, { type: mime });
} catch (error) {
window.BlobBuilder =
window.BlobBuilder ||
window.WebKitBlobBuilder ||
window.MozBlobBuilder ||
window.MSBlobBuilder;
if (error.name === "TypeError" && window.BlobBuilder) {
var builder = new BlobBuilder();
builder.append(arrayBuffer);
result = builder.getBlob(type);
} else {
throw new Error("没救了");
}
}
return result;
},
async upload() {
try {
let that = this;
let params = { filename: that.file_name };
console.log(params.filename);
//获取签名
Api.barthday2.getsign(params).then(res => {
if (res.code == 0) {
that.uploadFile(res.data.Sign);
} else {
that.$toast.clear();
this.$toast(res.message);
}
});
} catch (err) {
that.$toast.clear();
that.$toast(err);
}
},
async uploadFile(url) {
let that = this;
let config = {
headers: {
"Content-Type": "application/octet-stream"
}
}; //添加请求头
this.$http
.put(url, this.file, config)
.then(response => {
//上传oss成功后把图片地址给服务器
})
.catch(res => {
that.$toast("抱歉,系统异常,上传失败!");
});
},