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 "components/nacl/renderer/ppb_nacl_private.h"
  13 #include "ppapi/c/pp_array_output.h"
  14 #include "third_party/jsoncpp/source/include/json/value.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
  33   // Initialize the manifest object for use by later lookups. Returns
  34   // true if the manifest parses correctly and matches the schema.
  35   bool Init(const std::string& json_manifest, ErrorInfo* error_info);
  36
  37   // Gets the full program URL for the current sandbox ISA from the
  38   // manifest file.
  39   bool GetProgramURL(std::string* full_url,
  40                      PP_PNaClOptions* pnacl_options,
  41                      bool* uses_nonsfi_mode,
  42                      ErrorInfo* error_info) const;
  43
  44   // Gets all the keys and their URLs in the "files" section that are
  45   // prefetchable.
  46   void GetPrefetchableFiles(
  47       std::vector<NaClResourcePrefetchRequest>* out_files) const;
  48
  49   // Resolves a key from the "files" section to a fully resolved URL,
  50   // i.e., relative URL values are fully expanded relative to the
  51   // manifest's URL (via ResolveURL).
  52   // If there was an error, details are reported via error_info.
  53   bool ResolveKey(const std::string& key,
  54                   std::string* full_url,
  55                   PP_PNaClOptions* pnacl_options) const;
  56
  57  private:
  58   bool MatchesSchema(ErrorInfo* error_info);
  59   bool GetKeyUrl(const Json::Value& dictionary,
  60                  const std::string& key,
  61                  std::string* full_url,
  62                  PP_PNaClOptions* pnacl_options) const;
  63   bool GetURLFromISADictionary(const Json::Value& dictionary,
  64                                const std::string& parent_key,
  65                                std::string* url,
  66                                PP_PNaClOptions* pnacl_options,
  67                                bool* uses_nonsfi_mode,
  68                                ErrorInfo* error_info) const;
  69
  70   std::string manifest_base_url_;
  71   std::string sandbox_isa_;
  72   bool nonsfi_enabled_;
  73   bool pnacl_debug_;
  74
  75   // The dictionary of manifest information parsed in Init().
  76   Json::Value dictionary_;
  77 };
  78
  79 }  // namespace nacl
  80
  81 #endif  // COMPONENTS_NACL_RENDERER_JSON_MANIFEST_H