从IBM Cloud存储访问公共URL

Question

我创建了一个IBM云对象存储服务，我创建了对象，即图像文件。

我正在寻找作为公共URL访问图像的步骤。我做了一些初步研究，发现有使用swift Client执行此操作的cURL命令。

参考链接How to access files in container in Object Storage Service in Bluemix?和Public URLs For Objects In Bluemix Object Storage Service

从上面的链接，它说以下步骤

1. 设置swift CLI。你能链接我设置Swift CLI的步骤吗？ （参考链接中的链接不再起作用）。

2.使用以下PUT请求更改容器ACL以读取

curl -X PUT "https://dal.objectstorage.open.softlayer.com/v1/AUTH_123/mycontainer" \
    -H "X-Auth-Token: token123" \
    -H "X-Container-Read: .r:*"

但我不知道在X-Auth-Token标题上输入什么？我从COS的服务凭证中获得以下信息。

{
  "apikey": "X7aDm6yu123123hXwqvq1231232HgOtIGeZiAOEg",
  "endpoints": "https://cos-service.bluemix.net/endpoints",
  "iam_apikey_description": "Auto generated apikey during resource-key operation for Instance - crn:v1:bluemix:public:cloud-object-storage:global:a/f9aabca54c702be8386b2a3f9815b4e4:d145a33e-e8b1-446f-a87d-69431eaec0b1::",
  "iam_apikey_name": "auto-generated-apikey-bed16ed5-1373-47bc-b268-5e0f521bc802",
  "iam_role_crn": "crn:v1:bluemix:public:iam::::serviceRole:Writer",
  "iam_serviceid_crn": "crn:v1:bluemix:public:iam-identity::a/f9aabca54c702be8386b2a3f9815b4e4::serviceid:ServiceId-36c373a0-4bb9-4316-bc4b-86ea4c98dcd7",
  "resource_instance_id": "crn:v1:bluemix:public:cloud-object-storage:global:a/f9aabca54c702be8386b2a3f9815b4e4:d145a33e-e8b1-446f-a87d-69431eaec0b1::"
}

任何帮助将非常感激。谢谢

Answer 1

承载令牌来自IAM。 https://console.bluemix.net/docs/services/cloud-object-storage/getting-started-cli.html#gather-key-information

有关生成预签名网址（临时）的信息，请参阅此文档。 https://console.bluemix.net/docs/services/cloud-object-storage/api-reference/api-reference-objects.html#object-operations

Answer 2

要执行这样的一次性请求，您可以使用ibmcloud iam oauth-tokens从命令行获取oauth令牌。要专门获取IAM令牌，我使用：

export IAM_TOKEN=`ibmcloud iam oauth-tokens | head -n 1 | awk ' {print $4} '`

然后使用cURL命令跟进：

curl -H "Authorization: Bearer $IAM_TOKEN" ...

应用程序应根据提到的apiKey请求令牌。

curl -X POST -H "Content-Type: application/x-www-form-urlencoded" -H "Cache-Control: no-cache" -d 'apikey=<your api key here>&grant_type=urn:ibm:params:oauth:grant-type:apikey' "https://iam.bluemix.net/identity/token"

以下是使用NPM的请求承诺的示例：

const response = await rp({
  url: 'https://iam.bluemix.net/identity/token',
  headers: {
    'Content-Type': 'application/x-www-form-urlencoded',
  },
  method: "POST",
  body: `apikey=${apiKey}&grant_type=urn%3Aibm%3Aparams%3Aoauth%3Agrant-type%3Aapikey`,
  json: true
});

const token = response.access_token;