[英]Upload Base64 image with Firebase 3
是否可以将base64图像上传到Firebase?
我已经尝试过此代码:
var storageRef = firebase.storage().ref();
console.log(storageRef);
var file = "data:image/jpeg;base64,BASE64.....";
var uploadTask = storageRef.child('avatars/'+user.providerData[0].uid+'/photo-'+$scope.number+'.jpg').put(file);
uploadTask.on('state_changed', function(snapshot){
}, function(error) {
console.log('error');
}, function() {
console.log('success');
var downloadURL = uploadTask.snapshot.downloadURL;
});
但是我有一个错误:
{code: "storage/invalid-argument", message: "Firebase Storage: Invalid argument in `put` at index 0: Expected Blob or File.", serverResponse: null, name: "FirebaseError"}
您只需要使用putString函数,而无需将BASE64转换为blob。
firebase.storage().ref('/your/path/here').child('file_name')
.putString(your_base64_image, ‘base64’, {contentType:’image/jpg’});
确保将元数据{contentType:'image / jpg'}作为第三个参数 (可选)传递给函数putString,以便您检索图像格式的数据。
或简单地说:
uploadTask = firebase.storage().ref('/your/path/here').child('file_name').putString(image, 'base64', {contentType:'image/jpg'});
uploadTask.on(firebase.storage.TaskEvent.STATE_CHANGED, // or 'state_changed'
function(snapshot) {
// Get task progress, including the number of bytes uploaded and the total number of bytes to be uploaded
var progress = (snapshot.bytesTransferred / snapshot.totalBytes) * 100;
console.log('Upload is ' + progress + '% done');
switch (snapshot.state) {
case firebase.storage.TaskState.PAUSED: // or 'paused'
console.log('Upload is paused');
break;
case firebase.storage.TaskState.RUNNING: // or 'running'
console.log('Upload is running');
break;
}
}, function(error) {
console.log(error);
}, function() {
// Upload completed successfully, now we can get the download URL
var downloadURL = uploadTask.snapshot.downloadURL;
});
然后,您可以使用downloadURL保存到firebase.database()和/或作为src放入<img>
标记。
您可以将base64传递到返回这样的blob的函数中:
base64toBlob(base64Data, contentType) {
contentType = contentType || '';
var sliceSize = 1024;
var byteCharacters = atob(base64Data);
var bytesLength = byteCharacters.length;
var slicesCount = Math.ceil(bytesLength / sliceSize);
var byteArrays = new Array(slicesCount);
for (var sliceIndex = 0; sliceIndex < slicesCount; ++sliceIndex) {
var begin = sliceIndex * sliceSize;
var end = Math.min(begin + sliceSize, bytesLength);
var bytes = new Array(end - begin);
for (var offset = begin, i = 0 ; offset < end; ++i, ++offset) {
bytes[i] = byteCharacters[offset].charCodeAt(0);
}
byteArrays[sliceIndex] = new Uint8Array(bytes);
}
return new Blob(byteArrays, { type: contentType });
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.