chrome/browser/android/offline_pages/offline_page_mhtml_archiver.cc

   1 // Copyright 2015 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/android/offline_pages/offline_page_mhtml_archiver.h"
   6
   7 #include "base/bind.h"
   8 #include "base/files/file_path.h"
   9 #include "base/logging.h"
  10 #include "base/message_loop/message_loop.h"
  11 #include "base/strings/string16.h"
  12 #include "base/strings/utf_string_conversions.h"
  13 #include "chrome/browser/android/offline_pages/offline_page_web_contents_observer.h"
  14 #include "content/public/browser/web_contents.h"
  15 #include "net/base/filename_util.h"
  16
  17 namespace offline_pages {
  18 namespace {
  19 const base::FilePath::CharType kMHTMLExtension[] = FILE_PATH_LITERAL("mhtml");
  20 const base::FilePath::CharType kDefaultFileName[] =
  21     FILE_PATH_LITERAL("offline_page");
  22
  23 base::FilePath GenerateFileName(GURL url, base::string16 title) {
  24   return net::GenerateFileName(url,
  25                                std::string(),             // content disposition
  26                                std::string(),             // charset
  27                                base::UTF16ToUTF8(title),  // suggested name
  28                                std::string(),             // mime-type
  29                                kDefaultFileName)
  30       .AddExtension(kMHTMLExtension);
  31 }
  32
  33 }  // namespace
  34
  35 OfflinePageMHTMLArchiver::OfflinePageMHTMLArchiver(
  36     content::WebContents* web_contents,
  37     const base::FilePath& archive_dir)
  38     : archive_dir_(archive_dir),
  39       web_contents_(web_contents),
  40       weak_ptr_factory_(this) {
  41   DCHECK(web_contents_);
  42 }
  43
  44 OfflinePageMHTMLArchiver::OfflinePageMHTMLArchiver(
  45     const base::FilePath& archive_dir)
  46     : archive_dir_(archive_dir),
  47       web_contents_(nullptr),
  48       weak_ptr_factory_(this) {
  49 }
  50
  51 OfflinePageMHTMLArchiver::~OfflinePageMHTMLArchiver() {
  52   if (web_contents_) {
  53     OfflinePageWebContentsObserver* web_contents_observer =
  54         OfflinePageWebContentsObserver::FromWebContents(web_contents_);
  55     if (web_contents_observer)
  56       web_contents_observer->set_main_frame_document_loaded_callback(
  57           base::Closure());
  58   }
  59 }
  60
  61 void OfflinePageMHTMLArchiver::CreateArchive(
  62     const CreateArchiveCallback& callback) {
  63   DCHECK(callback_.is_null());
  64   DCHECK(!callback.is_null());
  65   callback_ = callback;
  66
  67   GenerateMHTML();
  68 }
  69
  70 void OfflinePageMHTMLArchiver::GenerateMHTML() {
  71   if (archive_dir_.empty()) {
  72     DVLOG(1) << "Archive path was empty. Can't create archive.";
  73     ReportFailure(ArchiverResult::ERROR_ARCHIVE_CREATION_FAILED);
  74     return;
  75   }
  76
  77   if (!web_contents_) {
  78     DVLOG(1) << "WebContents is missing. Can't create archive.";
  79     ReportFailure(ArchiverResult::ERROR_CONTENT_UNAVAILABLE);
  80     return;
  81   }
  82
  83   OfflinePageWebContentsObserver* web_contents_observer =
  84       OfflinePageWebContentsObserver::FromWebContents(web_contents_);
  85   if (!web_contents_observer) {
  86     DVLOG(1) << "WebContentsObserver is missing. Can't create archive.";
  87     ReportFailure(ArchiverResult::ERROR_CONTENT_UNAVAILABLE);
  88     return;
  89   }
  90
  91   // If main frame document has not been loaded yet, wait until it is.
  92   if (!web_contents_observer->is_document_loaded_in_main_frame()) {
  93     web_contents_observer->set_main_frame_document_loaded_callback(
  94         base::Bind(&OfflinePageMHTMLArchiver::DoGenerateMHTML,
  95                    weak_ptr_factory_.GetWeakPtr()));
  96     return;
  97   }
  98
  99   DoGenerateMHTML();
 100 }
 101
 102 void OfflinePageMHTMLArchiver::DoGenerateMHTML() {
 103   // TODO(fgorski): Figure out if the actual URL can be different at
 104   // the end of MHTML generation. Perhaps we should pull it out after the MHTML
 105   // is generated.
 106   GURL url(web_contents_->GetLastCommittedURL());
 107   base::string16 title(web_contents_->GetTitle());
 108   base::FilePath file_path(archive_dir_.Append(GenerateFileName(url, title)));
 109
 110   web_contents_->GenerateMHTML(
 111       file_path, base::Bind(&OfflinePageMHTMLArchiver::OnGenerateMHTMLDone,
 112                             weak_ptr_factory_.GetWeakPtr(), url, file_path));
 113 }
 114
 115 void OfflinePageMHTMLArchiver::OnGenerateMHTMLDone(
 116     const GURL& url,
 117     const base::FilePath& file_path,
 118     int64 file_size) {
 119   if (file_size < 0) {
 120     ReportFailure(ArchiverResult::ERROR_ARCHIVE_CREATION_FAILED);
 121   } else {
 122     callback_.Run(this, ArchiverResult::SUCCESSFULLY_CREATED, url, file_path,
 123                   file_size);
 124   }
 125 }
 126
 127 void OfflinePageMHTMLArchiver::ReportFailure(ArchiverResult result) {
 128   DCHECK(result != ArchiverResult::SUCCESSFULLY_CREATED);
 129   callback_.Run(this, result, GURL(), base::FilePath(), 0);
 130 }
 131
 132 }  // namespace offline_pages