Merge pull request #131 from ebardsley/master

Allow passing the value of "approval_prompt" as a flag or option.

README.md

@@ -93,6 +93,7 @@ An example [oauth2_proxy.cfg](contrib/oauth2_proxy.cfg.example) config file is i
 
 ```
 Usage of oauth2_proxy:
+  -approval_prompt="force": Oauth approval_prompt
   -authenticated-emails-file="": authenticate against emails via file (one per line)
   -client-id="": the OAuth Client ID: ie: "123456.apps.googleusercontent.com"
   -client-secret="": the OAuth Client Secret

main.go

@@ -63,6 +63,7 @@ func main() {
 	flagSet.String("profile-url", "", "Profile access endpoint")
 	flagSet.String("validate-url", "", "Access token validation endpoint")
 	flagSet.String("scope", "", "Oauth scope specification")
+	flagSet.String("approval-prompt", "force", "Oauth approval_prompt")
 
 	flagSet.Parse(os.Args[1:])
 

options.go

@@ -52,6 +52,7 @@ type Options struct {
 	ProfileUrl     string `flag:"profile-url" cfg:"profile_url"`
 	ValidateUrl    string `flag:"validate-url" cfg:"validate_url"`
 	Scope          string `flag:"scope" cfg:"scope"`
+	ApprovalPrompt string `flag:"approval-prompt" cfg:"approval_prompt"`
 
 	RequestLogging bool `flag:"request-logging" cfg:"request_logging"`
 
@@ -76,6 +77,7 @@ func NewOptions() *Options {
 		PassBasicAuth:       true,
 		PassAccessToken:     false,
 		PassHostHeader:      true,
+		ApprovalPrompt:      "force",
 		RequestLogging:      true,
 	}
 }
@@ -165,7 +167,12 @@ func (o *Options) Validate() error {
 }
 
 func parseProviderInfo(o *Options, msgs []string) []string {
-	p := &providers.ProviderData{Scope: o.Scope, ClientID: o.ClientID, ClientSecret: o.ClientSecret}
+	p := &providers.ProviderData{
+		Scope:          o.Scope,
+		ClientID:       o.ClientID,
+		ClientSecret:   o.ClientSecret,
+		ApprovalPrompt: o.ApprovalPrompt,
+	}
 	p.LoginUrl, msgs = parseUrl(o.LoginUrl, "login", msgs)
 	p.RedeemUrl, msgs = parseUrl(o.RedeemUrl, "redeem", msgs)
 	p.ProfileUrl, msgs = parseUrl(o.ProfileUrl, "profile", msgs)

providers/provider_data.go

@@ -13,6 +13,7 @@ type ProviderData struct {
 	ProfileUrl     *url.URL
 	ValidateUrl    *url.URL
 	Scope          string
+	ApprovalPrompt string
 }
 
 func (p *ProviderData) Data() *ProviderData { return p }

providers/provider_default.go

@@ -80,7 +80,7 @@ func (p *ProviderData) GetLoginURL(redirectURI, finalRedirect string) string {
 	a = *p.LoginUrl
 	params, _ := url.ParseQuery(a.RawQuery)
 	params.Set("redirect_uri", redirectURI)
-	params.Set("approval_prompt", "force")
+	params.Set("approval_prompt", p.ApprovalPrompt)
 	params.Add("scope", p.Scope)
 	params.Set("client_id", p.ClientID)
 	params.Set("response_type", "code")