Obtaining the CORS Configuration of a Bucket

Function

This API is used to obtain the CORS configuration of a bucket. For more information about CORS, see Configuring CORS to Allow Cross-Origin Access to OBS.

Authorization

To call this API, you must be the bucket owner or have the permission to obtain the CORS configuration of a bucket. You are advised to use IAM or bucket policies for authorization. For details about OBS authorization methods, see Differences Between OBS Permissions Control Methods.

• If you use IAM for authorization, you need to use either role/policy-based authorization or identity policy-based authorization and configure the required permissions:
  • If you use role/policy-based authorization (IAM v3 APIs in the old IAM version), you must have the obs:bucket:GetBucketCORS permission. For details, see Creating a Custom IAM Policy.
  • If you use identity policy-based authorization (IAM v5 APIs in the new IAM version), you must have the obs:bucket:getBucketCORS permission, as shown in the following table. For details, see Creating a Custom IAM Identity Policy.

    Action	Access Level	Resource Type (*: Required)	Condition Key	Alias	Dependencies
    obs:bucket:getBucketCORS	Read	bucket *	g:EnterpriseProjectId g:ResourceTag/<tag-key>	-	-
    		-	obs:EpochTime obs:SourceIp obs:TlsVersion obs:CustomDomain

• If you use bucket policies for authorization, you must have the obs:bucket:GetBucketCORS permission. For details, see Creating a Custom Bucket Policy.

URI

GET /

Calling Method

For details, see Calling APIs. Before calling this API, calculate the API signature and add it to the request.

You can debug this API in API Explorer.

Request Syntax

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GET /?cors HTTP/1.1 
Host: bucketname.obs.region.myhuaweicloud.com 
Date: date
Authorization: authorization

URI Parameters

This request contains no URI parameters.

Request Headers

This request uses common headers. For details, see Table 3.

Request Body

This request contains no request body parameters.

Response Syntax

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HTTP/1.1 status_code
Content-Type:  application/xml 
Date: date
Content-Length: length

<?xml version="1.0" encoding="UTF-8" standalone="yes"?> 
<CORSConfiguration xmlns="http://obs.region.myhuaweicloud.com/doc/2015-06-30/">
    <CORSRule> 
        ... 
    </CORSRule> 
</CORSConfiguration>

Response Headers

This response uses common headers. For details, see Table 1.

Response Body

This response contains elements to detail the configuration. Table 1 describes the elements.

Error Responses

Table 2 describes possible special errors in this request.

Common errors are included in Table 2.

Sample Request

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GET /?cors HTTP/1.1
User-Agent: curl/7.29.0
Host: examplebucket.obs.region.myhuaweicloud.com
Accept: */*
Date: WED, 01 Jul 2015 03:54:36 GMT
Authorization: OBS H4IPJX0TQTHTHEBQQCEC:WJGghTrPQQXRuCx5go1fHyE+Wwg=

Sample Response

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HTTP/1.1 200 OK
Server: OBS
x-obs-request-id: BF2600000164363593F10738B80CACBE
x-obs-id-2: 32AAAQAAEAABAAAQAAEAABAAAQAAEAABCSpngvwC5TskcLGh7Fz5KRmCFIayuY8p
Content-Type: application/xml
Date: WED, 01 Jul 2015 03:54:36 GMT
Content-Length: 825

<?xml version="1.0" encoding="utf-8"?> 
<CORSConfiguration xmlns="http://obs.region.myhuaweicloud.com/doc/2015-06-30/">
  <CORSRule> 
    <ID>783fc6652cf246c096ea836694f71855</ID>  
    <AllowedMethod>POST</AllowedMethod>  
    <AllowedMethod>GET</AllowedMethod>  
    <AllowedMethod>HEAD</AllowedMethod>  
    <AllowedMethod>PUT</AllowedMethod>  
    <AllowedMethod>DELETE</AllowedMethod>  
 
    <AllowedOrigin>obs.ap-southeast-1.myhuaweicloud.com</AllowedOrigin> 
    <AllowedOrigin>obs.example.com</AllowedOrigin>  
    <AllowedOrigin>www.example.com</AllowedOrigin>  
    <AllowedHeader>AllowedHeader_1</AllowedHeader>  
    <AllowedHeader>AllowedHeader_2</AllowedHeader>  
    <MaxAgeSeconds>100</MaxAgeSeconds>  
    <ExposeHeader>ExposeHeader_1</ExposeHeader>  
    <ExposeHeader>ExposeHeader_2</ExposeHeader>
  </CORSRule>
</CORSConfiguration>

Using SDKs to Call APIs

You are advised to use OBS SDKs to call APIs. SDKs encapsulate APIs to simplify development. You can call SDK API functions to access OBS without manually calculating signatures.