数据"/>
在Google云存储中获取/设置元数据
我正在尝试从Google Cloud Storage文件设置和检索元数据,但是我尝试的似乎不起作用。我的代码在Kubernetes节点中运行/我有这个:
// let's make sure that the source file is still there.
let sourceFile = storage.bucket(sourceFileObject.bucket).file( sourceFileObject.name );
const metadata = {
MD_DL_ERROR: 1
};
console.log( `Setting metadata for ${sourceFileObject.name} to: `, metadata );
sourceFile.setMetadata(metadata, function(err, apiResponse) {
console.log( `NOW GETTING METADATA for: ${sourceFileObject.name}` );
sourceFile.getMetadata( function(err, metadata, apiResponse) {
console.log( "got metadata: ", metadata );
} );
});
但是当它运行时,日志中显示的内容完全没有表明元数据已设置:
Setting metadata for CA-SACMLS/20022759_000.jpg to: { MD_DL_ERROR: 1 }
NOW GETTING METADATA for: CA-SACMLS/20022759_000.jpg
got metadata: { kind: 'storage#object',
id: 'idx-photos-raw-gs.ihouseprd/CA-SACMLS/20022759_000.jpg/1588629892121256',
selfLink: 'https://blah blah blah',
mediaLink: 'https://blah blah blah',
name: 'CA-SACMLS/20022759_000.jpg',
bucket: 'idx-photos-raw-gs.ihouseprd',
generation: '1588629892121256',
metageneration: '2',
contentType: 'image/jpg',
storageClass: 'MULTI_REGIONAL',
size: '124923',
md5Hash: 'HASHVAL',
crc32c: 'koOVMQ==',
etag: 'CKiFmcObm+kCEAI=',
timeCreated: '2020-05-04T22:04:52.120Z',
updated: '2020-05-04T22:04:52.509Z',
timeStorageClassUpdated: '2020-05-04T22:04:52.120Z' }
我想念什么?
回答如下:[我认为这是由于延迟了文件元数据的修改(这两个请求被触发得太近且太快),因此我在代码中添加了一个sleep函数,看起来像预期的工作。
const {Storage} = require('@google-cloud/storage');
const storage = new Storage();
const myBucket = storage.bucket('fakebucket');
//sleep definition
const sleep = (waitTimeInMs) => new Promise(resolve => setTimeout(resolve, waitTimeInMs));
const sourceFileObject = myBucket.file('demo.zip');
const metadata = {
metadata: {
rrasd: 'custom',
adsdasdasd: 'go here'
}
};
sourceFileObject.setMetadata(metadata, function(err, apiResponse) {
//wait for the propagation
sleep(250).then(() => {
sourceFileObject.getMetadata(function(err, metadata, apiResponse) {
console.log("got metadata: ", metadata);
})
})
});
};
更新
我更改了代码以避免重新定义const metadata
,并且看起来像预期的那样工作,由于我以前的代码可以工作,因此睡眠承诺不会共享元数据变量,感谢@AndyWallace的提示
const nmetadata = {
metadata: {
rr123809123asd: 'custom'
}
};
sourceFileObject.setMetadata(nmetadata, function(err, apiResponse) {
sourceFileObject.getMetadata( function(err, metadata, apiResponse) {
console.log( "got metadata: ", metadata );
})
});
};
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在Google云存储中获取/设置元数据
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