chrome/browser/search/local_files_ntp_source.cc

   1 // Copyright 2013 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/browser/search/local_files_ntp_source.h"
   6
   7 #include "base/bind.h"
   8 #include "base/files/file_path.h"
   9 #include "base/files/file_util.h"
  10 #include "base/location.h"
  11 #include "base/memory/ref_counted_memory.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/path_service.h"
  14 #include "base/strings/string_util.h"
  15 #include "base/threading/thread_restrictions.h"
  16 #include "chrome/common/url_constants.h"
  17 #include "content/public/browser/browser_thread.h"
  18 #include "content/public/browser/url_data_source.h"
  19
  20 namespace {
  21
  22 const char kBasePath[] = "chrome/browser/resources/local_ntp";
  23
  24 void CallbackWithLoadedResource(
  25     const std::string& origin,
  26     const content::URLDataSource::GotDataCallback& callback,
  27     const std::string& content) {
  28   std::string output = content;
  29   if (!origin.empty())
  30     base::ReplaceFirstSubstringAfterOffset(&output, 0, "{{ORIGIN}}", origin);
  31
  32   scoped_refptr<base::RefCountedString> response(
  33       base::RefCountedString::TakeString(&output));
  34   callback.Run(response.get());
  35 }
  36
  37 // Read a file to a string and return.
  38 std::string ReadFileAndReturn(const base::FilePath& path) {
  39   std::string data;
  40   // This call can fail, but it doesn't matter for our purposes. If it fails,
  41   // we simply return an empty string.
  42   base::ReadFileToString(path, &data);
  43   return data;
  44 }
  45
  46 }  // namespace
  47
  48 namespace local_ntp {
  49
  50 void SendLocalFileResource(
  51     const std::string& path,
  52     const content::URLDataSource::GotDataCallback& callback) {
  53   SendLocalFileResourceWithOrigin(path, std::string(), callback);
  54 }
  55
  56 void SendLocalFileResourceWithOrigin(
  57     const std::string& path,
  58     const std::string& origin,
  59     const content::URLDataSource::GotDataCallback& callback) {
  60   base::FilePath fullpath;
  61   PathService::Get(base::DIR_SOURCE_ROOT, &fullpath);
  62   fullpath = fullpath.AppendASCII(kBasePath).AppendASCII(path);
  63   base::PostTaskAndReplyWithResult(
  64       content::BrowserThread::GetBlockingPool(), FROM_HERE,
  65       base::Bind(&ReadFileAndReturn, fullpath),
  66       base::Bind(&CallbackWithLoadedResource, origin, callback));
  67 }
  68
  69 }  // namespace local_ntp