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      1 // Copyright (c) 2009 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 #include "chrome/utility/web_resource_unpacker.h"
      6 
      7 #include "base/json/json_reader.h"
      8 #include "base/values.h"
      9 
     10 const char* WebResourceUnpacker::kInvalidDataTypeError =
     11     "Data from web resource server is missing or not valid JSON.";
     12 
     13 const char* WebResourceUnpacker::kUnexpectedJSONFormatError =
     14     "Data from web resource server does not have expected format.";
     15 
     16 WebResourceUnpacker::WebResourceUnpacker(const std::string &resource_data)
     17     : resource_data_(resource_data) {
     18 }
     19 
     20 WebResourceUnpacker::~WebResourceUnpacker() {
     21 }
     22 
     23 // TODO(mrc): Right now, this reads JSON data from the experimental popgadget
     24 // server.  Change so the format is based on a template, once we have
     25 // decided on final server format.
     26 bool WebResourceUnpacker::Run() {
     27   scoped_ptr<base::Value> value;
     28   if (!resource_data_.empty()) {
     29     value.reset(base::JSONReader::Read(resource_data_));
     30     if (!value.get()) {
     31       // Page information not properly read, or corrupted.
     32       error_message_ = kInvalidDataTypeError;
     33       return false;
     34     }
     35     if (!value->IsType(base::Value::TYPE_DICTIONARY)) {
     36       error_message_ = kUnexpectedJSONFormatError;
     37       return false;
     38     }
     39     parsed_json_.reset(static_cast<base::DictionaryValue*>(value.release()));
     40     return true;
     41   }
     42   error_message_ = kInvalidDataTypeError;
     43   return false;
     44 }
     45 
     46