components/nacl/renderer/json_manifest.h

   1 // Copyright 2014 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 COMPONENTS_NACL_RENDERER_JSON_MANIFEST_H
   6 #define COMPONENTS_NACL_RENDERER_JSON_MANIFEST_H
   7
   8 #include <set>
   9 #include <string>
  10 #include <utility>
  11
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/values.h"
  14 #include "components/nacl/renderer/ppb_nacl_private.h"
  15
  16 namespace nacl {
  17 class JsonManifest;
  18 class NexeLoadManager;
  19 struct NaClResourcePrefetchRequest;
  20
  21 class JsonManifest {
  22  public:
  23   struct ErrorInfo {
  24     PP_NaClError error;
  25     std::string string;
  26   };
  27
  28   JsonManifest(const std::string& manifest_base_url,
  29                const std::string& sandbox_isa,
  30                bool nonsfi_enabled,
  31                bool pnacl_debug);
  32   ~JsonManifest();
  33
  34   // Initialize the manifest object for use by later lookups. Returns
  35   // true if the manifest parses correctly and matches the schema.
  36   bool Init(const std::string& json_manifest, ErrorInfo* error_info);
  37
  38   // Gets the full program URL for the current sandbox ISA from the
  39   // manifest file.
  40   bool GetProgramURL(std::string* full_url,
  41                      PP_PNaClOptions* pnacl_options,
  42                      bool* uses_nonsfi_mode,
  43                      ErrorInfo* error_info) const;
  44
  45   // Gets all the keys and their URLs in the "files" section that are
  46   // prefetchable.
  47   void GetPrefetchableFiles(
  48       std::vector<NaClResourcePrefetchRequest>* out_files) const;
  49
  50   // Resolves a key from the "files" section to a fully resolved URL,
  51   // i.e., relative URL values are fully expanded relative to the
  52   // manifest's URL (via ResolveURL).
  53   // If there was an error, details are reported via error_info.
  54   bool ResolveKey(const std::string& key,
  55                   std::string* full_url,
  56                   PP_PNaClOptions* pnacl_options) const;
  57
  58  private:
  59   bool MatchesSchema(ErrorInfo* error_info);
  60   bool GetKeyUrl(const base::DictionaryValue& dictionary,
  61                  const std::string& key,
  62                  std::string* full_url,
  63                  PP_PNaClOptions* pnacl_options) const;
  64   bool GetURLFromISADictionary(const base::DictionaryValue& parent_dictionary,
  65                                const std::string& parent_key,
  66                                std::string* url,
  67                                PP_PNaClOptions* pnacl_options,
  68                                bool* uses_nonsfi_mode,
  69                                ErrorInfo* error_info) const;
  70
  71   std::string manifest_base_url_;
  72   std::string sandbox_isa_;
  73   bool nonsfi_enabled_;
  74   bool pnacl_debug_;
  75
  76   // The dictionary of manifest information parsed in Init().
  77   scoped_ptr<base::DictionaryValue> dictionary_;
  78 };
  79
  80 }  // namespace nacl
  81
  82 #endif  // COMPONENTS_NACL_RENDERER_JSON_MANIFEST_H