forked from TencentCloud/tencentcloud-sdk-go
/
provider_chain.go
41 lines (35 loc) · 1.13 KB
/
provider_chain.go
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package common
import (
tcerr "github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/common/errors"
)
type ProviderChain struct {
Providers []Provider
}
// NewProviderChain returns a provider chain in your custom order
func NewProviderChain(providers []Provider) Provider {
return &ProviderChain{
Providers: providers,
}
}
// DefaultProviderChain returns a default provider chain and try to get credentials in the following order:
// 1. Environment variable
// 2. Profile
// 3. CvmRole
// If you want to customize the search order, please use the function NewProviderChain
func DefaultProviderChain() Provider {
return NewProviderChain([]Provider{DefaultEnvProvider(), DefaultProfileProvider(), DefaultCvmRoleProvider()})
}
func (c *ProviderChain) GetCredential() (CredentialIface, error) {
for _, provider := range c.Providers {
cred, err := provider.GetCredential()
if err != nil {
if err == envNotSet || err == fileDoseNotExist || err == noCvmRole {
continue
} else {
return nil, err
}
}
return cred, err
}
return nil, tcerr.NewTencentCloudSDKError(creErr, "no credential found in every providers", "")
}