rclone/backend/oracleobjectstorage/client.go

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//go:build !plan9 && !solaris && !js
// +build !plan9,!solaris,!js
package oracleobjectstorage
import (
"context"
"crypto/rsa"
"errors"
"net/http"
"os"
"path"
"strings"
"github.com/oracle/oci-go-sdk/v65/common"
"github.com/oracle/oci-go-sdk/v65/common/auth"
"github.com/oracle/oci-go-sdk/v65/objectstorage"
"github.com/rclone/rclone/fs"
"github.com/rclone/rclone/fs/fserrors"
"github.com/rclone/rclone/fs/fshttp"
)
func expandPath(filepath string) (expandedPath string) {
if filepath == "" {
return filepath
}
cleanedPath := path.Clean(filepath)
expandedPath = cleanedPath
if strings.HasPrefix(cleanedPath, "~") {
rest := cleanedPath[2:]
home, err := os.UserHomeDir()
if err != nil {
return expandedPath
}
expandedPath = path.Join(home, rest)
}
return
}
func getConfigurationProvider(opt *Options) (common.ConfigurationProvider, error) {
switch opt.Provider {
case instancePrincipal:
return auth.InstancePrincipalConfigurationProvider()
case userPrincipal:
expandConfigFilePath := expandPath(opt.ConfigFile)
if expandConfigFilePath != "" && !fileExists(expandConfigFilePath) {
fs.Errorf(userPrincipal, "oci config file doesn't exist at %v", expandConfigFilePath)
}
return common.CustomProfileConfigProvider(expandConfigFilePath, opt.ConfigProfile), nil
case resourcePrincipal:
return auth.ResourcePrincipalConfigurationProvider()
case noAuth:
fs.Infof("client", "using no auth provider")
return getNoAuthConfiguration()
default:
}
return common.DefaultConfigProvider(), nil
}
func newObjectStorageClient(ctx context.Context, opt *Options) (*objectstorage.ObjectStorageClient, error) {
p, err := getConfigurationProvider(opt)
if err != nil {
return nil, err
}
client, err := objectstorage.NewObjectStorageClientWithConfigurationProvider(p)
if err != nil {
fs.Errorf(opt.Provider, "failed to create object storage client, %v", err)
return nil, err
}
if opt.Region != "" {
client.SetRegion(opt.Region)
}
modifyClient(ctx, opt, &client.BaseClient)
return &client, err
}
func fileExists(filePath string) bool {
if _, err := os.Stat(filePath); errors.Is(err, os.ErrNotExist) {
return false
}
return true
}
func modifyClient(ctx context.Context, opt *Options, client *common.BaseClient) {
client.HTTPClient = getHTTPClient(ctx)
if opt.Provider == noAuth {
client.Signer = getNoAuthSigner()
}
}
// getClient makes http client according to the global options
// this has rclone specific options support like dump headers, body etc.
func getHTTPClient(ctx context.Context) *http.Client {
return fshttp.NewClient(ctx)
}
var retryErrorCodes = []int{
408, // Request Timeout
429, // Rate exceeded.
500, // Get occasional 500 Internal Server Error
503, // Service Unavailable
504, // Gateway Time-out
}
func shouldRetry(ctx context.Context, resp *http.Response, err error) (bool, error) {
if fserrors.ContextError(ctx, &err) {
return false, err
}
// If this is an ocierr object, try and extract more useful information to determine if we should retry
if ociError, ok := err.(common.ServiceError); ok {
// Simple case, check the original embedded error in case it's generically retryable
if fserrors.ShouldRetry(err) {
return true, err
}
// If it is a timeout then we want to retry that
if ociError.GetCode() == "RequestTimeout" {
return true, err
}
}
// Ok, not an oci error, check for generic failure conditions
return fserrors.ShouldRetry(err) || fserrors.ShouldRetryHTTP(resp, retryErrorCodes), err
}
func getNoAuthConfiguration() (common.ConfigurationProvider, error) {
return &noAuthConfigurator{}, nil
}
func getNoAuthSigner() common.HTTPRequestSigner {
return &noAuthSigner{}
}
type noAuthConfigurator struct {
}
type noAuthSigner struct {
}
func (n *noAuthSigner) Sign(*http.Request) error {
return nil
}
func (n *noAuthConfigurator) PrivateRSAKey() (*rsa.PrivateKey, error) {
return nil, nil
}
func (n *noAuthConfigurator) KeyID() (string, error) {
return "", nil
}
func (n *noAuthConfigurator) TenancyOCID() (string, error) {
return "", nil
}
func (n *noAuthConfigurator) UserOCID() (string, error) {
return "", nil
}
func (n *noAuthConfigurator) KeyFingerprint() (string, error) {
return "", nil
}
func (n *noAuthConfigurator) Region() (string, error) {
return "", nil
}
func (n *noAuthConfigurator) AuthType() (common.AuthConfig, error) {
return common.AuthConfig{
AuthType: common.UnknownAuthenticationType,
IsFromConfigFile: false,
OboToken: nil,
}, nil
}
// Check the interfaces are satisfied
var (
_ common.ConfigurationProvider = &noAuthConfigurator{}
_ common.HTTPRequestSigner = &noAuthSigner{}
)