我想允许客户端(浏览器中的JavaScript)将文件上传到Google云端存储,这是我目前通过生成signed URLs来完成的。但是,默认情况下,上载的文件是私有的。如何确保通过签名URL上传的文件是公共可读的?
答案 0 :(得分:3)
控制文件ACL通过标题x-goog-acl处理,在计算签名URL时也必须包含标题http://jsfiddle.net/Lvc0u55v/3991/。为了公众可读性,请使用值public-read
。
let request = new XMLHttpRequest()
request.onreadystatechange = () => {
if (request.readyState === XMLHttpRequest.DONE) {
if (request.status === 200) {
console.log(`Google Cloud Storage upload was successful:`, request.responseText)
} else {
console.log(`Google Cloud Storage upload was not successful: ${request.status}`)
}
}
}
request.open('PUT', signedUrl, true)
// Don't care about content-type header for signature calculation
request.setRequestHeader('content-type', 'ignore')
request.setRequestHeader('x-goog-acl', 'public-read')
request.send(file)
let gcloud = require('gcloud')
let moment = require('moment')
let gcs = gcloud.storage({
projectId: process.env.GCLOUD_PROJECT_ID,
credentials: {
client_email: process.env.GCLOUD_CLIENT_EMAIL,
private_key: process.env.GCLOUD_PRIVATE_KEY,
},
})
let bucket = gcs.bucket('aBucket')
let cloudFile = bucket.file('aFile')
cloudFile.getSignedUrl({
action: 'write',
expires: moment.utc().add(1, 'days').format(),
contentType: 'ignore',
extensionHeaders: {'x-goog-acl': 'public-read',},
}, (error, signedUrl) => {
if (error != null) {
console.log(`Failed to obtain signed URL for file`)
} else {
console.log(`Got signed URL for file: ${signedUrl}`)
}
})