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 * Copyright 2015, Google Inc.
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 * in the documentation and/or other materials provided with the
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#import "GRPCCall.h"

// Helpers for setting and reading headers compatible with OAuth2.
@interface GRPCCall (OAuth2)

// Setting this property is equivalent to setting "Bearer <passed token>" as the value of the
// request header with key "authorization" (the authorization header). Setting it to nil removes the
// authorization header from the request.
// The value obtained by getting the property is the OAuth2 bearer token if the authorization header
// of the request has the form "Bearer <token>", or nil otherwise.
@property(atomic, copy) NSString *oauth2AccessToken;

// Returns the value (if any) of the "www-authenticate" response header (the challenge header).
@property(atomic, readonly) NSString *oauth2ChallengeHeader;

@end