| # Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| import json |
| import logging |
| import os |
| import re |
| import shutil |
| |
| from telemetry.page import cloud_storage |
| |
| |
| def _UpdateHashFile(file_path): |
| with open(file_path + '.sha1', 'wb') as f: |
| f.write(cloud_storage.GetHash(file_path)) |
| f.flush() |
| |
| |
| class PageSetArchiveInfo(object): |
| def __init__(self, archive_data_file_path, page_set_file_path, data): |
| self._archive_data_file_path = archive_data_file_path |
| self._archive_data_file_dir = os.path.dirname(archive_data_file_path) |
| # Back pointer to the page set file. |
| self._page_set_file_path = page_set_file_path |
| |
| for archive_path in data['archives']: |
| cloud_storage.GetIfChanged(cloud_storage.DEFAULT_BUCKET, archive_path) |
| |
| # Map from the relative path (as it appears in the metadata file) of the |
| # .wpr file to a list of urls it supports. |
| self._wpr_file_to_urls = data['archives'] |
| |
| # Map from the page url to a relative path (as it appears in the metadata |
| # file) of the .wpr file. |
| self._url_to_wpr_file = dict() |
| # Find out the wpr file names for each page. |
| for wpr_file in data['archives']: |
| page_urls = data['archives'][wpr_file] |
| for url in page_urls: |
| self._url_to_wpr_file[url] = wpr_file |
| self.temp_target_wpr_file_path = None |
| |
| @classmethod |
| def FromFile(cls, file_path, page_set_file_path): |
| cloud_storage.GetIfChanged(cloud_storage.DEFAULT_BUCKET, file_path) |
| |
| if os.path.exists(file_path): |
| with open(file_path, 'r') as f: |
| data = json.load(f) |
| return cls(file_path, page_set_file_path, data) |
| return cls(file_path, page_set_file_path, {'archives': {}}) |
| |
| def WprFilePathForPage(self, page): |
| if self.temp_target_wpr_file_path: |
| return self.temp_target_wpr_file_path |
| wpr_file = self._url_to_wpr_file.get(page.url, None) |
| if wpr_file: |
| return self._WprFileNameToPath(wpr_file) |
| return None |
| |
| def AddNewTemporaryRecording(self, temp_target_wpr_file_path): |
| self.temp_target_wpr_file_path = temp_target_wpr_file_path |
| |
| def AddRecordedPages(self, urls): |
| (target_wpr_file, target_wpr_file_path) = self._NextWprFileName() |
| for url in urls: |
| self._SetWprFileForPage(url, target_wpr_file) |
| shutil.move(self.temp_target_wpr_file_path, target_wpr_file_path) |
| _UpdateHashFile(target_wpr_file_path) |
| self._WriteToFile() |
| self._DeleteAbandonedWprFiles() |
| |
| def _DeleteAbandonedWprFiles(self): |
| # Update the metadata so that the abandoned wpr files don't have empty url |
| # arrays. |
| abandoned_wpr_files = self._AbandonedWprFiles() |
| for wpr_file in abandoned_wpr_files: |
| del self._wpr_file_to_urls[wpr_file] |
| # Don't fail if we're unable to delete some of the files. |
| wpr_file_path = self._WprFileNameToPath(wpr_file) |
| try: |
| os.remove(wpr_file_path) |
| except Exception: |
| logging.warning('Failed to delete file: %s' % wpr_file_path) |
| |
| def _AbandonedWprFiles(self): |
| abandoned_wpr_files = [] |
| for wpr_file, urls in self._wpr_file_to_urls.iteritems(): |
| if not urls: |
| abandoned_wpr_files.append(wpr_file) |
| return abandoned_wpr_files |
| |
| def _WriteToFile(self): |
| """Writes the metadata into the file passed as constructor parameter.""" |
| metadata = dict() |
| metadata['description'] = ( |
| 'Describes the Web Page Replay archives for a page set. Don\'t edit by ' |
| 'hand! Use record_wpr for updating.') |
| # Pointer from the metadata to the page set .json file. |
| metadata['page_set'] = os.path.relpath(self._page_set_file_path, |
| self._archive_data_file_dir) |
| metadata['archives'] = self._wpr_file_to_urls.copy() |
| # Don't write data for abandoned archives. |
| abandoned_wpr_files = self._AbandonedWprFiles() |
| for wpr_file in abandoned_wpr_files: |
| del metadata['archives'][wpr_file] |
| |
| with open(self._archive_data_file_path, 'w') as f: |
| json.dump(metadata, f, indent=4) |
| f.flush() |
| _UpdateHashFile(self._archive_data_file_path) |
| |
| def _WprFileNameToPath(self, wpr_file): |
| return os.path.abspath(os.path.join(self._archive_data_file_dir, wpr_file)) |
| |
| def _NextWprFileName(self): |
| """Creates a new file name for a wpr archive file.""" |
| # The names are of the format "some_thing_number.wpr". Read the numbers. |
| highest_number = -1 |
| base = None |
| for wpr_file in self._wpr_file_to_urls: |
| match = re.match(r'(?P<BASE>.*)_(?P<NUMBER>[0-9]+)\.wpr', wpr_file) |
| if not match: |
| raise Exception('Illegal wpr file name ' + wpr_file) |
| highest_number = max(int(match.groupdict()['NUMBER']), highest_number) |
| if base and match.groupdict()['BASE'] != base: |
| raise Exception('Illegal wpr file name ' + wpr_file + |
| ', doesn\'t begin with ' + base) |
| base = match.groupdict()['BASE'] |
| if not base: |
| # If we're creating a completely new info file, use the base name of the |
| # page set file. |
| base = os.path.splitext(os.path.basename(self._page_set_file_path))[0] |
| new_filename = '%s_%03d.wpr' % (base, highest_number + 1) |
| return new_filename, self._WprFileNameToPath(new_filename) |
| |
| def _SetWprFileForPage(self, url, wpr_file): |
| """For modifying the metadata when we're going to record a new archive.""" |
| old_wpr_file = self._url_to_wpr_file.get(url, None) |
| if old_wpr_file: |
| self._wpr_file_to_urls[old_wpr_file].remove(url) |
| self._url_to_wpr_file[url] = wpr_file |
| if wpr_file not in self._wpr_file_to_urls: |
| self._wpr_file_to_urls[wpr_file] = [] |
| self._wpr_file_to_urls[wpr_file].append(url) |