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Merge pull request #258 from cybozu/add-open-browser-option
Add open browser option (-w, --web)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| package aws | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "errors" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "net/url" | ||
| "strings" | ||
| "time" | ||
|
|
||
| "github.com/aws/aws-sdk-go/aws/credentials" | ||
| "github.com/aws/aws-sdk-go/aws/session" | ||
| ) | ||
|
|
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| // AWSClient is an interface for AWS operations | ||
| type awsClientInterface interface { | ||
| GetConsoleURL() (string, error) | ||
| } | ||
|
|
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| // awsClient is the implementation of AWSClient interface | ||
| type awsClient struct { | ||
| session *session.Session | ||
| } | ||
|
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| // NewAWSClient creates a new AWSClient instance | ||
| // | ||
| // By default NewSession will only load credentials from the shared credentials file (~/.aws/credentials). | ||
| func NewAWSClient() awsClientInterface { | ||
| // Create session | ||
| sess := session.Must(session.NewSessionWithOptions(session.Options{ | ||
| SharedConfigState: session.SharedConfigEnable, | ||
| })) | ||
|
|
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| return &awsClient{ | ||
| session: sess, | ||
| } | ||
| } | ||
|
|
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| // GetConsoleURL returns the AWS Management Console URL | ||
| // ref: https://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_providers_enable-console-custom-url.html | ||
| func (c *awsClient) GetConsoleURL() (string, error) { | ||
| amazonDomain := c.getConsoleDomain(*c.session.Config.Region) | ||
|
|
||
| // Create get signin token URL | ||
| creds, err := c.session.Config.Credentials.Get() | ||
| if err != nil { | ||
| return "", errors.New("failed to get aws credential: please authenticate with `assam`") | ||
| } | ||
|
|
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| token, err := c.getSigninToken(creds, amazonDomain) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
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| targetURL := fmt.Sprintf("https://console.%s/console/home", amazonDomain) | ||
| params := url.Values{ | ||
| "Action": []string{"login"}, | ||
| "Destination": []string{targetURL}, | ||
| "SigninToken": []string{token}, | ||
| } | ||
|
|
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| return fmt.Sprintf("https://signin.%s/federation?%s", amazonDomain, params.Encode()), nil | ||
| } | ||
|
|
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| // getConsoleDomain returns the console domain based on the region | ||
| func (c *awsClient) getConsoleDomain(region string) string { | ||
| var amazonDomain string | ||
|
|
||
| if strings.HasPrefix(region, "us-gov-") { | ||
| amazonDomain = "amazonaws-us-gov.com" | ||
| } else if strings.HasPrefix(region, "cn-") { | ||
| amazonDomain = "amazonaws.cn" | ||
| } else { | ||
| amazonDomain = "aws.amazon.com" | ||
| } | ||
| return amazonDomain | ||
| } | ||
|
|
||
| // getSinginToken retrieves the signin token | ||
| func (c *awsClient) getSigninToken(creds credentials.Value, amazonDomain string) (string, error) { | ||
| urlCreds := map[string]string{ | ||
| "sessionId": creds.AccessKeyID, | ||
| "sessionKey": creds.SecretAccessKey, | ||
| "sessionToken": creds.SessionToken, | ||
| } | ||
|
|
||
| bytes, err := json.Marshal(urlCreds) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| params := url.Values{ | ||
| "Action": []string{"getSigninToken"}, | ||
| "DurationSeconds": []string{"900"}, // DurationSeconds minimum value | ||
| "Session": []string{string(bytes)}, | ||
| } | ||
| tokenRequest := fmt.Sprintf("https://signin.%s/federation?%s", amazonDomain, params.Encode()) | ||
|
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| ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) | ||
| defer cancel() | ||
|
|
||
| // Construct a request to the federation URL. | ||
| req, err := http.NewRequestWithContext(ctx, http.MethodGet, tokenRequest, nil) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
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||
| resp, err := http.DefaultClient.Do(req) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| defer resp.Body.Close() | ||
|
|
||
| if resp.StatusCode != http.StatusOK { | ||
| return "", fmt.Errorf("request failed: %s", resp.Status) | ||
| } | ||
|
|
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| // Extract a signin token from the response body. | ||
| token, err := c.getToken(resp.Body) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
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| return token, nil | ||
| } | ||
|
|
||
| // getToken extracts the signin token from the response body | ||
| func (c *awsClient) getToken(reader io.Reader) (string, error) { | ||
| type response struct { | ||
| SigninToken string | ||
| } | ||
|
|
||
| var resp response | ||
| if err := json.NewDecoder(reader).Decode(&resp); err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| return resp.SigninToken, nil | ||
| } |
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