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