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Diffstat (limited to 'vendor/golang.org/x/oauth2/oauth2.go')
| -rw-r--r-- | vendor/golang.org/x/oauth2/oauth2.go | 337 |
1 files changed, 0 insertions, 337 deletions
diff --git a/vendor/golang.org/x/oauth2/oauth2.go b/vendor/golang.org/x/oauth2/oauth2.go deleted file mode 100644 index 9b7b977..0000000 --- a/vendor/golang.org/x/oauth2/oauth2.go +++ /dev/null @@ -1,337 +0,0 @@ -// Copyright 2014 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Package oauth2 provides support for making -// OAuth2 authorized and authenticated HTTP requests. -// It can additionally grant authorization with Bearer JWT. -package oauth2 - -import ( - "bytes" - "errors" - "net/http" - "net/url" - "strings" - "sync" - - "golang.org/x/net/context" - "golang.org/x/oauth2/internal" -) - -// NoContext is the default context you should supply if not using -// your own context.Context (see https://golang.org/x/net/context). -var NoContext = context.TODO() - -// RegisterBrokenAuthHeaderProvider registers an OAuth2 server -// identified by the tokenURL prefix as an OAuth2 implementation -// which doesn't support the HTTP Basic authentication -// scheme to authenticate with the authorization server. -// Once a server is registered, credentials (client_id and client_secret) -// will be passed as query parameters rather than being present -// in the Authorization header. -// See https://code.google.com/p/goauth2/issues/detail?id=31 for background. -func RegisterBrokenAuthHeaderProvider(tokenURL string) { - internal.RegisterBrokenAuthHeaderProvider(tokenURL) -} - -// Config describes a typical 3-legged OAuth2 flow, with both the -// client application information and the server's endpoint URLs. -type Config struct { - // ClientID is the application's ID. - ClientID string - - // ClientSecret is the application's secret. - ClientSecret string - - // Endpoint contains the resource server's token endpoint - // URLs. These are constants specific to each server and are - // often available via site-specific packages, such as - // google.Endpoint or github.Endpoint. - Endpoint Endpoint - - // RedirectURL is the URL to redirect users going through - // the OAuth flow, after the resource owner's URLs. - RedirectURL string - - // Scope specifies optional requested permissions. - Scopes []string -} - -// A TokenSource is anything that can return a token. -type TokenSource interface { - // Token returns a token or an error. - // Token must be safe for concurrent use by multiple goroutines. - // The returned Token must not be modified. - Token() (*Token, error) -} - -// Endpoint contains the OAuth 2.0 provider's authorization and token -// endpoint URLs. -type Endpoint struct { - AuthURL string - TokenURL string -} - -var ( - // AccessTypeOnline and AccessTypeOffline are options passed - // to the Options.AuthCodeURL method. They modify the - // "access_type" field that gets sent in the URL returned by - // AuthCodeURL. - // - // Online is the default if neither is specified. If your - // application needs to refresh access tokens when the user - // is not present at the browser, then use offline. This will - // result in your application obtaining a refresh token the - // first time your application exchanges an authorization - // code for a user. - AccessTypeOnline AuthCodeOption = SetAuthURLParam("access_type", "online") - AccessTypeOffline AuthCodeOption = SetAuthURLParam("access_type", "offline") - - // ApprovalForce forces the users to view the consent dialog - // and confirm the permissions request at the URL returned - // from AuthCodeURL, even if they've already done so. - ApprovalForce AuthCodeOption = SetAuthURLParam("approval_prompt", "force") -) - -// An AuthCodeOption is passed to Config.AuthCodeURL. -type AuthCodeOption interface { - setValue(url.Values) -} - -type setParam struct{ k, v string } - -func (p setParam) setValue(m url.Values) { m.Set(p.k, p.v) } - -// SetAuthURLParam builds an AuthCodeOption which passes key/value parameters -// to a provider's authorization endpoint. -func SetAuthURLParam(key, value string) AuthCodeOption { - return setParam{key, value} -} - -// AuthCodeURL returns a URL to OAuth 2.0 provider's consent page -// that asks for permissions for the required scopes explicitly. -// -// State is a token to protect the user from CSRF attacks. You must -// always provide a non-zero string and validate that it matches the -// the state query parameter on your redirect callback. -// See http://tools.ietf.org/html/rfc6749#section-10.12 for more info. -// -// Opts may include AccessTypeOnline or AccessTypeOffline, as well -// as ApprovalForce. -func (c *Config) AuthCodeURL(state string, opts ...AuthCodeOption) string { - var buf bytes.Buffer - buf.WriteString(c.Endpoint.AuthURL) - v := url.Values{ - "response_type": {"code"}, - "client_id": {c.ClientID}, - "redirect_uri": internal.CondVal(c.RedirectURL), - "scope": internal.CondVal(strings.Join(c.Scopes, " ")), - "state": internal.CondVal(state), - } - for _, opt := range opts { - opt.setValue(v) - } - if strings.Contains(c.Endpoint.AuthURL, "?") { - buf.WriteByte('&') - } else { - buf.WriteByte('?') - } - buf.WriteString(v.Encode()) - return buf.String() -} - -// PasswordCredentialsToken converts a resource owner username and password -// pair into a token. -// -// Per the RFC, this grant type should only be used "when there is a high -// degree of trust between the resource owner and the client (e.g., the client -// is part of the device operating system or a highly privileged application), -// and when other authorization grant types are not available." -// See https://tools.ietf.org/html/rfc6749#section-4.3 for more info. -// -// The HTTP client to use is derived from the context. -// If nil, http.DefaultClient is used. -func (c *Config) PasswordCredentialsToken(ctx context.Context, username, password string) (*Token, error) { - return retrieveToken(ctx, c, url.Values{ - "grant_type": {"password"}, - "username": {username}, - "password": {password}, - "scope": internal.CondVal(strings.Join(c.Scopes, " ")), - }) -} - -// Exchange converts an authorization code into a token. -// -// It is used after a resource provider redirects the user back -// to the Redirect URI (the URL obtained from AuthCodeURL). -// -// The HTTP client to use is derived from the context. -// If a client is not provided via the context, http.DefaultClient is used. -// -// The code will be in the *http.Request.FormValue("code"). Before -// calling Exchange, be sure to validate FormValue("state"). -func (c *Config) Exchange(ctx context.Context, code string) (*Token, error) { - return retrieveToken(ctx, c, url.Values{ - "grant_type": {"authorization_code"}, - "code": {code}, - "redirect_uri": internal.CondVal(c.RedirectURL), - "scope": internal.CondVal(strings.Join(c.Scopes, " ")), - }) -} - -// Client returns an HTTP client using the provided token. -// The token will auto-refresh as necessary. The underlying -// HTTP transport will be obtained using the provided context. -// The returned client and its Transport should not be modified. -func (c *Config) Client(ctx context.Context, t *Token) *http.Client { - return NewClient(ctx, c.TokenSource(ctx, t)) -} - -// TokenSource returns a TokenSource that returns t until t expires, -// automatically refreshing it as necessary using the provided context. -// -// Most users will use Config.Client instead. -func (c *Config) TokenSource(ctx context.Context, t *Token) TokenSource { - tkr := &tokenRefresher{ - ctx: ctx, - conf: c, - } - if t != nil { - tkr.refreshToken = t.RefreshToken - } - return &reuseTokenSource{ - t: t, - new: tkr, - } -} - -// tokenRefresher is a TokenSource that makes "grant_type"=="refresh_token" -// HTTP requests to renew a token using a RefreshToken. -type tokenRefresher struct { - ctx context.Context // used to get HTTP requests - conf *Config - refreshToken string -} - -// WARNING: Token is not safe for concurrent access, as it -// updates the tokenRefresher's refreshToken field. -// Within this package, it is used by reuseTokenSource which -// synchronizes calls to this method with its own mutex. -func (tf *tokenRefresher) Token() (*Token, error) { - if tf.refreshToken == "" { - return nil, errors.New("oauth2: token expired and refresh token is not set") - } - - tk, err := retrieveToken(tf.ctx, tf.conf, url.Values{ - "grant_type": {"refresh_token"}, - "refresh_token": {tf.refreshToken}, - }) - - if err != nil { - return nil, err - } - if tf.refreshToken != tk.RefreshToken { - tf.refreshToken = tk.RefreshToken - } - return tk, err -} - -// reuseTokenSource is a TokenSource that holds a single token in memory -// and validates its expiry before each call to retrieve it with -// Token. If it's expired, it will be auto-refreshed using the -// new TokenSource. -type reuseTokenSource struct { - new TokenSource // called when t is expired. - - mu sync.Mutex // guards t - t *Token -} - -// Token returns the current token if it's still valid, else will -// refresh the current token (using r.Context for HTTP client -// information) and return the new one. -func (s *reuseTokenSource) Token() (*Token, error) { - s.mu.Lock() - defer s.mu.Unlock() - if s.t.Valid() { - return s.t, nil - } - t, err := s.new.Token() - if err != nil { - return nil, err - } - s.t = t - return t, nil -} - -// StaticTokenSource returns a TokenSource that always returns the same token. -// Because the provided token t is never refreshed, StaticTokenSource is only -// useful for tokens that never expire. -func StaticTokenSource(t *Token) TokenSource { - return staticTokenSource{t} -} - -// staticTokenSource is a TokenSource that always returns the same Token. -type staticTokenSource struct { - t *Token -} - -func (s staticTokenSource) Token() (*Token, error) { - return s.t, nil -} - -// HTTPClient is the context key to use with golang.org/x/net/context's -// WithValue function to associate an *http.Client value with a context. -var HTTPClient internal.ContextKey - -// NewClient creates an *http.Client from a Context and TokenSource. -// The returned client is not valid beyond the lifetime of the context. -// -// As a special case, if src is nil, a non-OAuth2 client is returned -// using the provided context. This exists to support related OAuth2 -// packages. -func NewClient(ctx context.Context, src TokenSource) *http.Client { - if src == nil { - c, err := internal.ContextClient(ctx) - if err != nil { - return &http.Client{Transport: internal.ErrorTransport{err}} - } - return c - } - return &http.Client{ - Transport: &Transport{ - Base: internal.ContextTransport(ctx), - Source: ReuseTokenSource(nil, src), - }, - } -} - -// ReuseTokenSource returns a TokenSource which repeatedly returns the -// same token as long as it's valid, starting with t. -// When its cached token is invalid, a new token is obtained from src. -// -// ReuseTokenSource is typically used to reuse tokens from a cache -// (such as a file on disk) between runs of a program, rather than -// obtaining new tokens unnecessarily. -// -// The initial token t may be nil, in which case the TokenSource is -// wrapped in a caching version if it isn't one already. This also -// means it's always safe to wrap ReuseTokenSource around any other -// TokenSource without adverse effects. -func ReuseTokenSource(t *Token, src TokenSource) TokenSource { - // Don't wrap a reuseTokenSource in itself. That would work, - // but cause an unnecessary number of mutex operations. - // Just build the equivalent one. - if rt, ok := src.(*reuseTokenSource); ok { - if t == nil { - // Just use it directly. - return rt - } - src = rt.new - } - return &reuseTokenSource{ - t: t, - new: src, - } -} |