我正在开发一个 Angular 应用程序,用于显示谷歌云存储桶的内容。对于后面,我在nodeJS中使用谷歌云功能
正如他们在上传文件的文档中提到的,我创建了一个函数来生成签名的 url,但是当我使用签名的 url 发送文件时,我在浏览器中收到了 cors 错误
我用 postman 进行了测试,它上传了一个空文件
这是我的 lambda 函数:
// Imports the Google Cloud client library
const {Storage} = require('@google-cloud/storage');
// Creates a client
const storage = new Storage();
exports.generateSignedUrl = (req, res) => {
// generate signed url to use for file upload
const filename = req.query.fileName;
console.log('filename ', filename);
const filetype = req.query.fileType;
console.log('filetype ', filetype);
const bucketName = 'nx-terega-omega';
res.set('Access-Control-Allow-Origin', "*");
res.set('Access-Control-Allow-Headers', "Origin, X-Requested-With,
Content-Type, Accept, Authorization");
if (req.query.fileName !== null && req.query.fileName !== undefined
&& req.query.fileType !== null && req.query.fileType !== undefined)
{
generateV4UploadSignedUrl(bucketName, filename).then(function (value)
{
console.log('File Url response ', value);
res.status(200).send(JSON.stringify({'url': value}));
}).catch(error => {
res.status(404).send('Error while generating signed url');
});
} else {
res.status(500).send('Filename not found');
}
};
async function generateV4UploadSignedUrl(bucketName, filename, filetype) {
// [START storage_generate_upload_signed_url_v4]
// These options will allow temporary uploading of the file with outgoing
// Content-Type: application/octet-stream header.
const options = {
version: 'v4',
action: 'write',
expires: Date.now() + 15 * 60 * 1000, // 15 minutes
contentType: filetype,
};
// Get a v4 signed URL for uploading file
const [url] = await storage
.bucket(bucketName)
.file(filename)
.getSignedUrl(options);
console.log('Generated PUT signed URL:');
console.log(url);
console.log('You can use this URL with any user agent, for example:');
console.log("curl -X PUT -H 'Content-Type: application/octet-stream' " +`--upload-file my-file '${url}'`);
return url;
// [END storage_generate_upload_signed_url_v4]
}
当我收到签名的网址时,我将我的文件发送给它,但它返回
No 'Access-Control-Allow-Origin' header is present on the requested resource.
最佳答案
正如 Brandon Yarbrough 回复中提到的,我必须在 Google Cloud 中配置 cors。我的配置中缺少一些内容
[
{
"origin": ["http://example.appspot.com"],
"responseHeader": ["*"],
"method": ["GET", "HEAD", "DELETE", "PUT"],
"maxAgeSeconds": 3600
}
]
您应该在方法
中包含PUT
,并将*
放入responseHeader
中,因为Content-Type
不够
关于node.js - 如何使用签名网址将文件上传到谷歌云存储桶,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55761597/