docs: update readme

README.md

@@ -4,32 +4,67 @@
 
 ## Usage
 
-在某个神秘的地方注册好 Client，配置 redirect url 并获取 id 和 secret
-
 ```go
 import(
-    "github.com/BingyanStudio/oidc-cli/oidc"
+	"github.com/BingyanStudio/oidc-cli/oidc"
 )
 
-var oidcConfig = oidc.Config{
-    ClientID:     "xxxx-xx-xxxxxxx-xxxx",
-    ClientSecret: "xxxxxxxxx",
-    RedirectURL:  "http://example-client.com/callback",
-}
+var oidcCli = oidc.NewClient(
+	&oidc.Config{
+		ClientID:     "CLIENT_ID",
+		ClientSecret: "CLIENT_SECRET",
+		RedirectURL:  "", // Frontend Callback URI
+	},
+)
 
-func OidcCallbackHandler(c echo.Context) error {
-    code := c.QueryParam("code")
-    callbackRes, err := oidc.Callback(oidcConfig, code)
-    if err != nil {
-        ...
-    }
-
-    log.Println(callbackRes.IDToken);
-    log.Println(callbackRes.Claims.Subject);
-    log.Println(callbackRes.Claims.Phone);
-
-    ... // use the token & claims to further authorization
-}
+func UserTokenHandler(c echo.Context) error {
+	code := c.QueryParam("code")
+	tokens, err := oidcCli.RetrieveTokens(code)
+	if err != nil {
+		...
+	}
 
+	log.Println(tokens)
+
+	... // use the token & claims to further authorization
+}
 ```
 
+具体用法参见 [example](example)
+
+对于获取的返回值`ResponseTokens`：
+
+- IDToken 的 Claims 已解析至 `ResponseTokens.IDTokenClaims`
+
+  字段如下
+
+  ```go
+  type IDTokenClaims struct {
+  	Issuer    string `json:"iss,omitempty"`
+  	IssuedAt  int64  `json:"iat,omitempty"` // issue time of token
+  	ExpiresAt int64  `json:"exp,omitempty"` // expire time of token
+
+  	Audience  string `json:"aud,omitempty"`     // client id
+  	Nounce    string `json:"nounce,omitempty"`  // ramdom generated by client
+  	ATHash    string `json:"at_hash,omitempty"` // access token hash - for client to validate the access token
+  	Subject   string `json:"sub,omitempty"`     // user id
+  	Role      string `json:"rol,omitempty"`     // role of user
+  	SessionId string `json:"sid,omitempty"`
+
+  	Nickname string `json:"nickname,omitempty"`
+  	Picture  string `json:"picture,omitempty"`
+  	Gender   string `json:"gender,omitempty"`
+
+  	Email         string `json:"email,omitempty"`
+  	EmailVerified bool   `json:"email_verified,omitempty"`
+  	Phone         string `json:"phone,omitempty"`
+  	PhoneVerified bool   `json:"phone_verified,omitempty"`
+  	Group         string `json:"group,omitempty"`
+  }
+  ```
+
+  其中，`sub` 为用户的身份唯一标识符；身份信息的返回取决于  Scope 的设置。
+
+- 库中封装的 Scope 默认为 `[]string{oidc.ScopeOpenID, ScopeProfile, ScopePhone, ScopeEmail}`
+
+- 若要实现用户令牌的刷新，需以适当的方法存储 `ResponseTokens.IDToken` 与 `ResponseTokens.RefreshToken`。当刷新 RP 的 Token 时需确定 IDToken 的有效性。

example/README.md

@@ -1,5 +1,7 @@
 # 运行
 
+注册 Client 并替换 `CLIENT_ID` 与 `CLIENT_SECRET`
+
 - backend
 
 ```
@@ -11,6 +13,6 @@ go run app.go
 
 ```
 npm install
-npm
+npm start
 ```
 

go.mod

@@ -4,15 +4,24 @@ go 1.20
 
 require (
 	github.com/coreos/go-oidc/v3 v3.6.0
+	github.com/labstack/echo/v4 v4.11.2
 	golang.org/x/oauth2 v0.11.0
 )
 
 require (
 	github.com/go-jose/go-jose/v3 v3.0.0 // indirect
+	github.com/golang-jwt/jwt v3.2.2+incompatible // indirect
 	github.com/golang/protobuf v1.5.3 // indirect
-	github.com/stretchr/testify v1.8.1 // indirect
-	golang.org/x/crypto v0.12.0 // indirect
-	golang.org/x/net v0.14.0 // indirect
+	github.com/labstack/gommon v0.4.0 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.19 // indirect
+	github.com/valyala/bytebufferpool v1.0.0 // indirect
+	github.com/valyala/fasttemplate v1.2.2 // indirect
+	golang.org/x/crypto v0.14.0 // indirect
+	golang.org/x/net v0.17.0 // indirect
+	golang.org/x/sys v0.13.0 // indirect
+	golang.org/x/text v0.13.0 // indirect
+	golang.org/x/time v0.3.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/protobuf v1.31.0 // indirect
 )

go.sum

@@ -5,37 +5,62 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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@@ -46,5 +71,5 @@ google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs
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+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=