Add support for temporary URL for Swift driver
Signed-off-by: Sylvain Baubeau <sbaubeau@redhat.com>
This commit is contained in:
Sylvain Baubeau
parent
7759153f2f
commit
7c3281861f
3 changed files with 234 additions and 46 deletions
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@ -93,6 +93,16 @@ An implementation of the `storagedriver.StorageDriver` interface that uses [Open
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<code>trustid</code>
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</td>
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<td>
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<p>
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Optionally, your OpenStack trust id for Identity v3 API.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<code>insecureskipverify</code>
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@ -133,4 +143,58 @@ An implementation of the `storagedriver.StorageDriver` interface that uses [Open
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<code>secretkey</code>
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</td>
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<td>
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<p>
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Optionally, the secret key used to generate temporary URLs.</p>
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<code>accesskey</code>
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</td>
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<td>
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<p>
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Optionally, the access key to generate temporary URLs. It is used by HP Cloud Object Storage in addition to the `secretkey` parameter.</p>
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</p>
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</td>
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</tr>
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</table>
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The features supported by the Swift server are queried by requesting the `/info` URL on the server. In case the administrator
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disabled that feature, the configuration file can specify the following optional parameters :
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<table>
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<tr>
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<td>
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<code>tempurlcontainerkey</code>
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</td>
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<td>
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<p>
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Specify whether to use container secret key to generate temporary URL when set to true, or the account secret key otherwise.</p>
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<code>tempurlmethods</code>
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</td>
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<td>
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<p>
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Array of HTTP methods that are supported by the TempURL middleware of the Swift server. Example:</p>
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<code>
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- tempurlmethods:
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- GET
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- PUT
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- HEAD
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- POST
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- DELETE
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</code>
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</p>
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</td>
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</tr>
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</table>
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@ -7,9 +7,6 @@
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// It supports both TempAuth authentication and Keystone authentication
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// (up to version 3).
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//
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// Since Swift has no concept of directories (directories are an abstration),
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// empty objects are created with the MIME type application/vnd.swift.directory.
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//
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// As Swift has a limit on the size of a single uploaded object (by default
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// this is 5GB), the driver makes use of the Swift Large Object Support
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// (http://docs.openstack.org/developer/swift/overview_large_objects.html).
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@ -24,12 +21,11 @@ import (
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"crypto/sha1"
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"crypto/tls"
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"encoding/hex"
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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gopath "path"
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"net/url"
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"strconv"
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"strings"
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"time"
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@ -67,9 +63,21 @@ type Parameters struct {
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Prefix string
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InsecureSkipVerify bool
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ChunkSize int
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SecretKey string
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AccessKey string
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TempURLContainerKey bool
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TempURLMethods []string
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}
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type swiftInfo map[string]interface{}
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// swiftInfo maps the JSON structure returned by Swift /info endpoint
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type swiftInfo struct {
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Swift struct {
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Version string `mapstructure:"version"`
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}
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Tempurl struct {
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Methods []string `mapstructure:"methods"`
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}
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}
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func init() {
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factory.Register(driverName, &swiftDriverFactory{})
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@ -88,6 +96,10 @@ type driver struct {
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Prefix string
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BulkDeleteSupport bool
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ChunkSize int
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SecretKey string
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AccessKey string
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TempURLContainerKey bool
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TempURLMethods []string
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}
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type baseEmbed struct {
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@ -179,8 +191,62 @@ func New(params Parameters) (*Driver, error) {
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Conn: ct,
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Container: params.Container,
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Prefix: params.Prefix,
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BulkDeleteSupport: detectBulkDelete(params.AuthURL),
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ChunkSize: params.ChunkSize,
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TempURLMethods: make([]string, 0),
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AccessKey: params.AccessKey,
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}
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info := swiftInfo{}
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if config, err := d.Conn.QueryInfo(); err == nil {
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_, d.BulkDeleteSupport = config["bulk_delete"]
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if err := mapstructure.Decode(config, &info); err == nil {
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d.TempURLContainerKey = info.Swift.Version >= "2.3.0"
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d.TempURLMethods = info.Tempurl.Methods
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}
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} else {
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d.TempURLContainerKey = params.TempURLContainerKey
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d.TempURLMethods = params.TempURLMethods
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}
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if len(d.TempURLMethods) > 0 {
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secretKey := params.SecretKey
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if secretKey == "" {
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secretKey, _ = generateSecret()
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}
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// Since Swift 2.2.2, we can now set secret keys on containers
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// in addition to the account secret keys. Use them in preference.
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if d.TempURLContainerKey {
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_, containerHeaders, err := d.Conn.Container(d.Container)
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if err != nil {
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return nil, fmt.Errorf("Failed to fetch container info %s (%s)", d.Container, err)
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}
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d.SecretKey = containerHeaders["X-Container-Meta-Temp-Url-Key"]
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if d.SecretKey == "" || (params.SecretKey != "" && d.SecretKey != params.SecretKey) {
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m := swift.Metadata{}
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m["temp-url-key"] = secretKey
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if d.Conn.ContainerUpdate(d.Container, m.ContainerHeaders()); err == nil {
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d.SecretKey = secretKey
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}
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}
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} else {
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// Use the account secret key
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_, accountHeaders, err := d.Conn.Account()
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if err != nil {
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return nil, fmt.Errorf("Failed to fetch account info (%s)", err)
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}
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d.SecretKey = accountHeaders["X-Account-Meta-Temp-Url-Key"]
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if d.SecretKey == "" || (params.SecretKey != "" && d.SecretKey != params.SecretKey) {
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m := swift.Metadata{}
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m["temp-url-key"] = secretKey
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if err := d.Conn.AccountUpdate(m.AccountHeaders()); err == nil {
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d.SecretKey = secretKey
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}
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}
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}
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}
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return &Driver{
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@ -590,11 +656,60 @@ func (d *driver) Delete(ctx context.Context, path string) error {
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}
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// URLFor returns a URL which may be used to retrieve the content stored at the given path.
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// May return an UnsupportedMethodErr in certain StorageDriver implementations.
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func (d *driver) URLFor(ctx context.Context, path string, options map[string]interface{}) (string, error) {
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if d.SecretKey == "" {
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return "", storagedriver.ErrUnsupportedMethod
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}
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methodString := "GET"
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method, ok := options["method"]
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if ok {
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if methodString, ok = method.(string); !ok {
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return "", storagedriver.ErrUnsupportedMethod
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}
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}
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if methodString == "HEAD" {
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// A "HEAD" request on a temporary URL is allowed if the
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// signature was generated with "GET", "POST" or "PUT"
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methodString = "GET"
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}
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supported := false
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for _, method := range d.TempURLMethods {
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if method == methodString {
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supported = true
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break
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}
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}
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if !supported {
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return "", storagedriver.ErrUnsupportedMethod
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}
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expiresTime := time.Now().Add(20 * time.Minute)
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expires, ok := options["expiry"]
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if ok {
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et, ok := expires.(time.Time)
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if ok {
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expiresTime = et
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}
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}
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tempURL := d.Conn.ObjectTempUrl(d.Container, d.swiftPath(path), d.SecretKey, methodString, expiresTime)
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if d.AccessKey != "" {
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// On HP Cloud, the signature must be in the form of tenant_id:access_key:signature
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url, _ := url.Parse(tempURL)
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query := url.Query()
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query.Set("temp_url_sig", fmt.Sprintf("%s:%s:%s", d.Conn.TenantId, d.AccessKey, query.Get("temp_url_sig")))
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url.RawQuery = query.Encode()
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tempURL = url.String()
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}
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return tempURL, nil
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}
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func (d *driver) swiftPath(path string) string {
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return strings.TrimLeft(strings.TrimRight(d.Prefix+"/files"+path, "/"), "/")
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}
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@ -640,19 +755,6 @@ func (d *driver) createManifest(path string, segments string) error {
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return nil
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}
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func detectBulkDelete(authURL string) (bulkDelete bool) {
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resp, err := http.Get(gopath.Join(authURL, "..", "..") + "/info")
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if err == nil {
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defer resp.Body.Close()
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decoder := json.NewDecoder(resp.Body)
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var infos swiftInfo
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if decoder.Decode(&infos) == nil {
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_, bulkDelete = infos["bulk_delete"]
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}
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}
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return
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}
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func parseManifest(manifest string) (container string, prefix string) {
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components := strings.SplitN(manifest, "/", 2)
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container = components[0]
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@ -661,3 +763,11 @@ func parseManifest(manifest string) (container string, prefix string) {
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}
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return container, prefix
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}
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func generateSecret() (string, error) {
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var secretBytes [32]byte
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if _, err := rand.Read(secretBytes[:]); err != nil {
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return "", fmt.Errorf("could not generate random bytes for Swift secret key: %v", err)
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}
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return hex.EncodeToString(secretBytes[:]), nil
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}
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@ -4,6 +4,7 @@ import (
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"io/ioutil"
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"os"
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"strconv"
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"strings"
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"testing"
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"github.com/ncw/swift/swifttest"
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@ -33,6 +34,11 @@ func init() {
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container string
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region string
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insecureSkipVerify bool
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secretKey string
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accessKey string
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containerKey bool
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tempURLMethods []string
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swiftServer *swifttest.SwiftServer
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err error
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)
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@ -47,6 +53,10 @@ func init() {
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container = os.Getenv("SWIFT_CONTAINER_NAME")
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region = os.Getenv("SWIFT_REGION_NAME")
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insecureSkipVerify, _ = strconv.ParseBool(os.Getenv("SWIFT_INSECURESKIPVERIFY"))
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secretKey = os.Getenv("SWIFT_SECRET_KEY")
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accessKey = os.Getenv("SWIFT_ACCESS_KEY")
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containerKey, _ = strconv.ParseBool(os.Getenv("SWIFT_TEMPURL_CONTAINERKEY"))
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tempURLMethods = strings.Split(os.Getenv("SWIFT_TEMPURL_METHODS"), ",")
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if username == "" || password == "" || authURL == "" || container == "" {
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if swiftServer, err = swifttest.NewSwiftServer("localhost"); err != nil {
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@ -79,6 +89,10 @@ func init() {
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root,
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insecureSkipVerify,
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defaultChunkSize,
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secretKey,
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accessKey,
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containerKey,
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tempURLMethods,
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}
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return New(parameters)
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