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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef GOOGLE_APIS_GOOGLE_API_KEYS_H_
      6 #define GOOGLE_APIS_GOOGLE_API_KEYS_H_
      7 
      8 // If you add more includes to this file, you also need to add them to
      9 // google_api_keys_unittest.cc.
     10 #include <string>
     11 
     12 // These functions enable you to retrieve keys to use for Google APIs
     13 // such as Translate and Safe Browsing.
     14 //
     15 // You can retrieve either an "API key" (sometimes called a developer
     16 // key) which identifies you (or the company you work for) as a
     17 // developer, or you can retrieve the "client ID" and "client secret"
     18 // used by you (or the company you work for) to generate OAuth2
     19 // requests.
     20 //
     21 // Each developer (or group of developers working together for a
     22 // single company) must request a Google API key and the client ID and
     23 // client secret for OAuth2.  See
     24 // https://developers.google.com/console/help/ and
     25 // https://developers.google.com/console/.
     26 //
     27 // The keys must either be provided using preprocessor variables (set
     28 // via e.g. ~/.gyp/include.gypi). Alternatively, they can be
     29 // overridden at runtime using environment variables of the same name.
     30 //
     31 // The names of the preprocessor variables (or environment variables
     32 // to override them at runtime) are as follows:
     33 // - GOOGLE_API_KEY: The API key, a.k.a. developer key.
     34 // - GOOGLE_DEFAULT_CLIENT_ID: If set, this is used as the default for
     35 //   all client IDs not otherwise set.  This is intended only for
     36 //   development.
     37 // - GOOGLE_DEFAULT_CLIENT_SECRET: If set, this is used as the default
     38 //   for all client secrets.  This is intended only for development.
     39 // - GOOGLE_CLIENT_ID_[client name]
     40 //   (e.g. GOOGLE_CLIENT_ID_CLOUD_PRINT, i.e. one for each item in the
     41 //   OAuth2Client enumeration below)
     42 // - GOOGLE_CLIENT_SECRET_[client name]
     43 //   (e.g. GOOGLE_CLIENT_SECRET_CLOUD_PRINT, i.e. one for each item in
     44 //   the OAuth2Client enumeration below)
     45 //
     46 // The GOOGLE_CLIENT_ID_MAIN and GOOGLE_CLIENT_SECRET_MAIN values can
     47 // also be set via the command line (this overrides any other
     48 // setting).  The command-line parameters are --oauth2-client-id and
     49 // --oauth2-client-secret.
     50 //
     51 // If some of the parameters mentioned above are not provided,
     52 // Chromium will still build and run, but services that require them
     53 // may fail to work without warning.  They should do so gracefully,
     54 // similar to what would happen when a network connection is
     55 // unavailable.
     56 
     57 namespace google_apis {
     58 
     59 // Returns true if no dummy API keys or OAuth2 tokens are set.
     60 bool HasKeysConfigured();
     61 
     62 // Retrieves the API key, a.k.a. developer key, or a dummy string
     63 // if not set.
     64 //
     65 // Note that the key should be escaped for the context you use it in,
     66 // e.g. URL-escaped if you use it in a URL.
     67 std::string GetAPIKey();
     68 
     69 // Represents the different sets of client IDs and secrets in use.
     70 enum OAuth2Client {
     71   CLIENT_MAIN,         // Several different features use this.
     72   CLIENT_CLOUD_PRINT,
     73   CLIENT_REMOTING,
     74   CLIENT_REMOTING_HOST,
     75 
     76   CLIENT_NUM_ITEMS     // Must be last item.
     77 };
     78 
     79 // Retrieves the OAuth2 client ID for the specified client, or the
     80 // empty string if not set.
     81 //
     82 // Note that the ID should be escaped for the context you use it in,
     83 // e.g. URL-escaped if you use it in a URL.
     84 std::string GetOAuth2ClientID(OAuth2Client client);
     85 
     86 // Retrieves the OAuth2 client secret for the specified client, or the
     87 // empty string if not set.
     88 //
     89 // Note that the secret should be escaped for the context you use it
     90 // in, e.g. URL-escaped if you use it in a URL.
     91 std::string GetOAuth2ClientSecret(OAuth2Client client);
     92 
     93 }  // namespace google_apis
     94 
     95 #endif  // GOOGLE_APIS_GOOGLE_API_KEYS_H_
     96