Azure Blob文件URL [英] Azure Blob Files URL
问题描述
您好，我找到了本指南:https://docs.microsoft.com/zh-CN/azure/storage/blobs/storage-quickstart-blobs-javascript-client-libraries
按照所有步骤操作后，我已成功为我的网站创建了一个上传器.
我想像使用AWS存储帐户一样使用它，在这里我可以通过javascript上传文件，并在上传后从服务器获取URL/md5.
我正在使用它:
document.getElementById('上传按钮').addEventListener('click'，()=> {
const file = document.getElementById('fileinput').files [0];
blobService.createBlockBlobFromBrowserFile('mycontainer'，
文件名，
文件，
(错误，结果)=> {
如果(错误){
//处理Blob错误
} 别的 {
console.log('上传成功');
}
});
});
正如我所说的那样，我可以在我的Azure帐户>中看到文件. Blob容器.
我有2个问题:
1-上传后如何获取链接.该代码不允许访问blob，例如:
console.log(blob);
我尝试过:
blobService.createBlockBlobFromBrowserFile('uploadbubble'，
文件名，
文件，
(错误，结果)=> {
如果(错误){
} 别的 {
console.log('上传成功');
blobService.listBlobsSegmented('uploadbubble'，null，(错误，结果)=> {
如果(错误){
//处理列表斑点错误
} 别的 {
results.entries.forEach(blob => {
console.log(blob);
});
}
}); 但是它列出了我所有的Blob，而不是最后一个上传的Blob.甚至在检查了Blob之后，我只看到了md5，而不是CDN URL. 2-为什么当我上传两次相同的文件而不是创建一个新文件时，它取代了现有文件? 致谢. 参考: http://azure.github.io/azure-storage-node/BlobService.html#getUrl ，使用该标头可以防止覆盖Blob.您可以阅读有关条件标题的更多信息
此处: 由于您不希望覆盖Blob，因此需要指定 如果不适用-Match
条件标头并将其值设置为 *
链接 正在更新现有块blob会覆盖blob上的所有现有元数据. Put Blob;不支持部分更新这
现有Blob的内容将被新Blob的内容覆盖.
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document.getElementById('upload-button').addEventListener('click', () => {
const file = document.getElementById('fileinput').files[0];
blobService.createBlockBlobFromBrowserFile('mycontainer',
file.name,
file,
(error, result) => {
if(error) {
// Handle blob error
} else {
console.log('Upload is successful');
}
});
}); Which as I said works perfect, I see the files in my Azure account > Blob container. I have 2 questions: 1- How I can get the link after uploading. That code doesn't permit to access to blob like: console.log(blob); I tried this: But it lists me all the blobs instead of the last one uploaded. And even after inspecting the blob, I only see the md5, not the CDN URL. 2- Why when I upload two times the same file instead of creating a new file it replaces the existing one? Regards. 1-
How I can get the link after uploading. You might want to call Refer: http://azure.github.io/azure-storage-node/BlobService.html#getUrl 2- Why when I upload two times the same file instead of creating a new file it replaces the existing
one?
If a blob exists in blob storage and if you upload another file with the same name as that of the
blob, old blob contents will automatically be replaced with the contents of new file. It’s a default nature of blobs. Windows Azure Blob Storage supports conditional
headers using which you can prevent overwriting of blobs. You can read more about conditional headers
here: http://msdn.microsoft.com/en-us/library/windowsazure/dd179371.aspx.
Since you want that a blob should not be overwritten, you would need to specify If-None-Match
conditional header and set its value to *
See the
link which is updating an existing block blob overwrites any existing metadata on the blob. Partial updates are not supported with Put Blob; the
content of the existing blob is overwritten with the content of the new blob.
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blobService.createBlockBlobFromBrowserFile('uploadbubble',
file.name,
file,
(error, result) => {
if(error) {
} else {
console.log('Upload is successful');
blobService.listBlobsSegmented('uploadbubble', null, (error, results) => {
if (error) {
// Handle list blobs error
} else {
results.entries.forEach(blob => {
console.log(blob);
});
}
});
blobService.getUrl(containerName,
blobName).
