使用節點js創建預簽名網址並將文件上傳到Google雲端存儲

Question

我需要使用簽名網址將文件上傳到谷歌雲存儲。 我需要通過不同的步驟上傳。

1. 使用bucketName，服務密鑰和所需的安全憑證創建signedUrl。（使用任何node.js庫）

2. 使用Postman或restClient上傳帶有已創建簽名網址的單個文件。

這是我創建signedUrl進行上傳的代碼

var crypto = require("crypto");
var fs = require("fs");

var URL_VALID_DURATION = 1000 * 120;//for 120 seconds

var expiry = Math.floor(((new Date).getTime() + URL_VALID_DURATION) / 1000);

var key = 'filename';
var bucketName = 'bucketName';
var accessId = 'gserviceaccount.com';
var stringPolicy = "POST\n" + "\n" + "\n" + expiry + "\n" + '/' + bucketName + '/' + key;
var base64Policy = Buffer(stringPolicy, "utf-8").toString("base64");
var privateKey = fs.readFileSync("google-services-private-key.pem", "utf8");
var signature = encodeURIComponent(crypto.createSign('sha256').update(stringPolicy).sign(privateKey, "base64"));
var signedUrl = "https://" + bucketName + ".commondatastorage.googleapis.com/" + key + "?GoogleAccessId=" + accessId + "&Expires=" + expiry + "&Signature=" + signature;

console.log(signedUrl);

但是當我和郵遞員或休息客戶一起使用時，我得到了錯誤

<?xml version='1.0' encoding='UTF-8'?>
<Error>
    <Code>SignatureDoesNotMatch</Code>
    <Message>The request signature we calculated does not match the signature you provided. Check your Google secret key and signing method.</Message>
    <StringToSign>PUT

multipart/form-data
1458024549
/bucketName/fileName</StringToSign>
</Error>

Answer 1

剛剛將stringPolicy方法更改為PUT。 並將圖像作為二進制發送。

var crypto = require("crypto");
var fs = require("fs");

var URL_VALID_DURATION = 1000 * 120;//for 120 seconds

var expiry = Math.floor(((new Date).getTime() + URL_VALID_DURATION) / 1000);

var key = 'filename';
var bucketName = 'bucketName';
var accessId = 'gserviceaccount.com';
var stringPolicy = "PUT\n" + "\n" + "\n" + expiry + "\n" + '/' + bucketName + '/' + key;
var base64Policy = Buffer(stringPolicy, "utf-8").toString("base64");
var privateKey = fs.readFileSync("google-services-private-key.pem", "utf8");
var signature = encodeURIComponent(crypto.createSign('sha256').update(stringPolicy).sign(privateKey, "base64"));
var signedUrl = "https://" + bucketName + ".commondatastorage.googleapis.com/" + key + "?GoogleAccessId=" + accessId + "&Expires=" + expiry + "&Signature=" + signature;

console.log(signedUrl);