forked from prasmussen/gdrive
-
-
Notifications
You must be signed in to change notification settings - Fork 10
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Squash of the following commits: Add oauth redirect listener Add an HTTP listener for use as the redirect_uri. This will allow gdrive to work after google phases out the "oob" redirect. Also implement oauth PKCE (code challenge) (cherry picked from commit ab31f42) Remove debug prints from oauth code (cherry picked from commit 1c4005f) Finish renaming redirect to callback The redirect_uri is where the google server redirects after completing authentication. From our perspective, it's a callback, not a redirect. Our authorize uri redirects to google, so it would be confusing to refer to the other url as a redirect (cherry picked from commit f2bd11a)
- Loading branch information
Showing
3 changed files
with
204 additions
and
22 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| package auth | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "net" | ||
| "net/http" | ||
| "os" | ||
| "time" | ||
|
|
||
| "golang.org/x/oauth2" | ||
| ) | ||
|
|
||
| type authorize struct{ authUrl string } | ||
| type callback struct { | ||
| done chan string | ||
| bad chan bool | ||
| state string | ||
| } | ||
|
|
||
| func (a authorize) ServeHTTP(w http.ResponseWriter, req *http.Request) { | ||
| w.Header().Add("Location", a.authUrl) | ||
| w.WriteHeader(302) | ||
| fmt.Fprintln(w, "<html><head>") | ||
| fmt.Fprintln(w, "<title>Redirect to authentication server</title>") | ||
| fmt.Fprintln(w, "</head><body>") | ||
| fmt.Fprintf(w, "Click <a href=\"%s\">here</a> to authorize gdrive to use Google Drive\n", | ||
| a.authUrl) | ||
| fmt.Fprintln(w, "</body></html>") | ||
| } | ||
|
|
||
| func (c callback) ServeHTTP(w http.ResponseWriter, req *http.Request) { | ||
| err := req.ParseForm() | ||
| if err != nil { | ||
| fmt.Printf("Could not parse form on /callback: %s\n", err) | ||
| w.WriteHeader(400) | ||
| fmt.Fprintln(w, "<html><head>") | ||
| fmt.Fprintln(w, "<title>Bad request</title>") | ||
| fmt.Fprintln(w, "</head><body>") | ||
| fmt.Fprintln(w, "Bad request: Missing authentication response") | ||
| fmt.Fprintln(w, "</body></html>") | ||
| return | ||
| } | ||
| if req.Form.Has("error") { | ||
| fmt.Printf("authentication failed, server response is %s\n", req.Form.Get("error")) | ||
| c.bad <- true | ||
| fmt.Fprintln(w, "<html><head>") | ||
| fmt.Fprintln(w, "<title>Google Drive authentication failed</title>") | ||
| fmt.Fprintln(w, "</head><body>") | ||
| fmt.Fprintf(w, "Authentication failed or refused: %s\n", req.Form.Get("error")) | ||
| fmt.Fprintln(w, "</body></html>") | ||
| return | ||
| } | ||
|
|
||
| if !req.Form.Has("code") || !req.Form.Has("state") { | ||
| fmt.Println("callback request is missing parameters") | ||
| w.WriteHeader(400) | ||
| fmt.Fprintln(w, "<html><head>") | ||
| fmt.Fprintln(w, "<title>Bad request</title>") | ||
| fmt.Fprintln(w, "</head><body>") | ||
| fmt.Fprintln(w, "Bad request: response is missing the code or state parameters") | ||
| fmt.Fprintln(w, "</body></html>") | ||
| return | ||
| } | ||
|
|
||
| code := req.Form.Get("code") | ||
| state := req.Form.Get("state") | ||
| if state != c.state { | ||
| fmt.Printf("Callback state mismatch: %s vs %s", state, c.state) | ||
| w.WriteHeader(400) | ||
| fmt.Fprintln(w, "<html><head>") | ||
| fmt.Fprintln(w, "<title>Bad request</title>") | ||
| fmt.Fprintln(w, "</head><body>") | ||
| fmt.Fprintln(w, "Bad request: response state mismatch") | ||
| fmt.Fprintln(w, "</body></html>") | ||
| return | ||
| } | ||
| fmt.Fprintln(w, "<html><head>") | ||
| fmt.Fprintln(w, "<title>Authentication response received</title>") | ||
| fmt.Fprintln(w, "</head><body>") | ||
| fmt.Fprintln(w, "Authentication response has been received. Check the terminal where gdrive is running") | ||
| fmt.Fprintln(w, "</body></html>") | ||
|
|
||
| c.done <- code | ||
| } | ||
|
|
||
| func AuthCodeHTTP(conf *oauth2.Config, state, challenge string) (func() (string, error), error) { | ||
|
|
||
| authChallengeMeth := oauth2.SetAuthURLParam("code_challenge_method", "S256") | ||
| authChallengeVal := oauth2.SetAuthURLParam("code_challenge", challenge) | ||
|
|
||
| ln, err := net.Listen("tcp4", "127.0.0.1:0") | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| hostPort := ln.Addr().String() | ||
| _, port, err := net.SplitHostPort(hostPort) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| mux := http.NewServeMux() | ||
| srv := &http.Server{Handler: mux} | ||
|
|
||
| go func() { | ||
| err := srv.Serve(ln) | ||
| if err != http.ErrServerClosed { | ||
| fmt.Printf("Cannot start http server: %s", err) | ||
| os.Exit(1) | ||
| } | ||
| }() | ||
| myconf := conf | ||
| myconf.RedirectURL = fmt.Sprintf("http://127.0.0.1:%s/callback", port) | ||
|
|
||
| authUrl := myconf.AuthCodeURL(state, oauth2.AccessTypeOffline, authChallengeMeth, authChallengeVal) | ||
| authorizer := authorize{authUrl: authUrl} | ||
| mux.Handle("/authorize", authorizer) | ||
| callback := callback{state: state, | ||
| done: make(chan string, 1), | ||
| bad: make(chan bool, 1), | ||
| } | ||
| mux.Handle("/callback", callback) | ||
|
|
||
| return func() (string, error) { | ||
| var code string | ||
| var err error | ||
| fmt.Println("Authentication needed") | ||
| fmt.Println("Go to the following url in your browser:") | ||
| fmt.Printf("http://127.0.0.1:%s/authorize\n\n", port) | ||
| fmt.Println("Waiting for authentication response") | ||
|
|
||
| select { | ||
| case <-callback.bad: | ||
| err = fmt.Errorf("authentication did not complete successfully") | ||
| code = "" | ||
| case code = <-callback.done: | ||
| } | ||
| ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) | ||
| defer func() { | ||
| cancel() | ||
| }() | ||
|
|
||
| if stoperr := srv.Shutdown(ctx); stoperr != nil { | ||
| fmt.Printf("Server Shutdown Failed:%+v\n", stoperr) | ||
| } | ||
| return code, err | ||
| }, nil | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters