使用节点js创建预先签名的url并上传文件到谷歌云存储

Question

我需要使用签名url将文件上传到谷歌云存储。我需要通过不同的步骤上传。

1. 创建使用bucketName，服务密钥和所需的安全证书的signedUrl。（使用任何的Node.js库）

2. 上传与创建标识的URL使用邮差或RESTClient实现一个单一的文件。

这是我上传

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); 

创建signedUrl代码，但我跟邮递员或其他客户端

<?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

只是改变stringPolicy方法把使用时遇到错误。并以二进制形式发送图像。

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);