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oauth.go
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oauth.go
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package handlers
import (
"fmt"
"net/url"
"strings"
"time"
"github.com/getfider/fider/app"
"github.com/getfider/fider/app/models"
"github.com/getfider/fider/app/pkg/errors"
"github.com/getfider/fider/app/pkg/jwt"
"github.com/getfider/fider/app/pkg/web"
"github.com/getfider/fider/app/pkg/web/util"
)
// OAuthEcho exchanges OAuth Code for a user profile and return directly to the UI, without storing it
func OAuthEcho() web.HandlerFunc {
return func(c web.Context) error {
provider := c.Param("provider")
code := c.QueryParam("code")
if code == "" {
return c.Redirect("/")
}
identifier := c.QueryParam("identifier")
if identifier == "" || identifier != c.SessionID() {
c.Logger().Warn("OAuth identifier doesn't match with user session ID. Aborting sign in process.")
return c.Redirect("/")
}
body, err := c.Services().OAuth.GetRawProfile(provider, code)
if err != nil {
return c.Page(web.Props{
Title: "OAuth Test Page",
ChunkName: "OAuthEcho.page",
Data: web.Map{
"err": errors.Cause(err).Error(),
},
})
}
profile, _ := c.Services().OAuth.ParseRawProfile(provider, body)
return c.Page(web.Props{
Title: "OAuth Test Page",
ChunkName: "OAuthEcho.page",
Data: web.Map{
"body": body,
"profile": profile,
},
})
}
}
// OAuthToken exchanges OAuth Code for a user profile
// The user profile is then used to either get an existing user on Fider or creating a new one
// Once Fider user is retrieved/created, an authentication cookie is store in user's browser
func OAuthToken() web.HandlerFunc {
return func(c web.Context) error {
provider := c.Param("provider")
redirectURL, _ := url.ParseRequestURI(c.QueryParam("redirect"))
redirectURL.ResolveReference(c.Request.URL)
code := c.QueryParam("code")
if code == "" {
return c.Redirect(redirectURL.String())
}
identifier := c.QueryParam("identifier")
if identifier == "" || identifier != c.SessionID() {
c.Logger().Warn("OAuth identifier doesn't match with user session ID. Aborting sign in process.")
return c.Redirect(redirectURL.String())
}
oauthUser, err := c.Services().OAuth.GetProfile(provider, code)
if err != nil {
return c.Failure(err)
}
users := c.Services().Users
user, err := users.GetByProvider(provider, oauthUser.ID)
if errors.Cause(err) == app.ErrNotFound && oauthUser.Email != "" {
user, err = users.GetByEmail(oauthUser.Email)
}
if err != nil {
if errors.Cause(err) == app.ErrNotFound {
if c.Tenant().IsPrivate {
return c.Redirect("/not-invited")
}
user = &models.User{
Name: oauthUser.Name,
Tenant: c.Tenant(),
Email: oauthUser.Email,
Role: models.RoleVisitor,
Providers: []*models.UserProvider{
&models.UserProvider{
UID: oauthUser.ID,
Name: provider,
},
},
}
err = users.Register(user)
if err != nil {
return c.Failure(err)
}
} else {
return c.Failure(err)
}
} else if !user.HasProvider(provider) {
err = users.RegisterProvider(user.ID, &models.UserProvider{
UID: oauthUser.ID,
Name: provider,
})
if err != nil {
return c.Failure(err)
}
}
webutil.AddAuthUserCookie(c, user)
return c.Redirect(redirectURL.String())
}
}
// OAuthCallback handles the redirect back from the OAuth provider
// This callback can run on either Tenant or Login address
// If the request is for a sign in, we redirect the user to the tenant address
// If the request is for a sign up, we exchange the OAuth code and get the user profile
func OAuthCallback() web.HandlerFunc {
return func(c web.Context) error {
c.Response.Header().Add("X-Robots-Tag", "noindex")
provider := c.Param("provider")
state := c.QueryParam("state")
parts := strings.Split(state, "|")
redirectURL, err := url.ParseRequestURI(parts[0])
if err != nil {
return c.Failure(err)
}
code := c.QueryParam("code")
if code == "" {
return c.Redirect(redirectURL.String())
}
//Test OAuth
if redirectURL.Path == fmt.Sprintf("/oauth/%s/echo", provider) {
var query = redirectURL.Query()
query.Set("code", code)
query.Set("identifier", parts[1])
redirectURL.RawQuery = query.Encode()
return c.Redirect(redirectURL.String())
}
//Sign up process
if redirectURL.Path == "/signup" {
oauthUser, err := c.Services().OAuth.GetProfile(provider, code)
if err != nil {
return c.Failure(err)
}
claims := jwt.OAuthClaims{
OAuthID: oauthUser.ID,
OAuthProvider: provider,
OAuthName: oauthUser.Name,
OAuthEmail: oauthUser.Email,
Metadata: jwt.Metadata{
ExpiresAt: time.Now().Add(10 * time.Minute).Unix(),
},
}
token, err := jwt.Encode(claims)
if err != nil {
return c.Failure(err)
}
var query = redirectURL.Query()
query.Set("token", token)
redirectURL.RawQuery = query.Encode()
return c.Redirect(redirectURL.String())
}
//Sign in process
var query = redirectURL.Query()
query.Set("code", code)
query.Set("redirect", redirectURL.RequestURI())
query.Set("identifier", parts[1])
redirectURL.RawQuery = query.Encode()
redirectURL.Path = fmt.Sprintf("/oauth/%s/token", provider)
return c.Redirect(redirectURL.String())
}
}
// SignInByOAuth is responsible for redirecting the user to the OAuth authorization URL for given provider
// A cookie is stored in user's browser with a random identifier that is later used to verify the authenticity of the request
func SignInByOAuth() web.HandlerFunc {
return func(c web.Context) error {
c.Response.Header().Add("X-Robots-Tag", "noindex")
provider := c.Param("provider")
redirect := c.QueryParam("redirect")
if redirect == "" {
redirect = c.BaseURL()
}
redirectURL, _ := url.ParseRequestURI(redirect)
redirectURL.ResolveReference(c.Request.URL)
if c.IsAuthenticated() && redirectURL.Path != fmt.Sprintf("/oauth/%s/echo", provider) {
return c.Redirect(redirect)
}
authURL, err := c.Services().OAuth.GetAuthURL(provider, redirect, c.SessionID())
if err != nil {
return c.Failure(err)
}
return c.Redirect(authURL)
}
}