rhodecode/apps/repository/views/repo_files.py

# Copyright (C) 2011-2023 RhodeCode GmbH
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3
# (only), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# This program is dual-licensed. If you wish to learn more about the
# RhodeCode Enterprise Edition, including its added features, Support services,
# and proprietary license terms, please see https://rhodecode.com/licenses/

import itertools
import logging
import os
import collections
import urllib.request
import urllib.parse
import urllib.error
import pathlib

from pyramid.httpexceptions import HTTPNotFound, HTTPBadRequest, HTTPFound

from pyramid.renderers import render
from pyramid.response import Response

import rhodecode
from rhodecode.apps._base import RepoAppView


from rhodecode.lib import diffs, helpers as h, rc_cache
from rhodecode.lib import audit_logger
from rhodecode.lib.hash_utils import sha1_safe
from rhodecode.lib.rc_cache.archive_cache import get_archival_cache_store, get_archival_config, ReentrantLock
from rhodecode.lib.str_utils import safe_bytes, convert_special_chars
from rhodecode.lib.view_utils import parse_path_ref
from rhodecode.lib.exceptions import NonRelativePathError
from rhodecode.lib.codeblocks import (
    filenode_as_lines_tokens, filenode_as_annotated_lines_tokens)
from rhodecode.lib.utils2 import convert_line_endings, detect_mode
from rhodecode.lib.type_utils import str2bool
from rhodecode.lib.str_utils import safe_str, safe_int
from rhodecode.lib.auth import (
    LoginRequired, HasRepoPermissionAnyDecorator, CSRFRequired)
from rhodecode.lib.vcs import path as vcspath
from rhodecode.lib.vcs.backends.base import EmptyCommit
from rhodecode.lib.vcs.conf import settings
from rhodecode.lib.vcs.nodes import FileNode
from rhodecode.lib.vcs.exceptions import (
    RepositoryError, CommitDoesNotExistError, EmptyRepositoryError,
    ImproperArchiveTypeError, VCSError, NodeAlreadyExistsError,
    NodeDoesNotExistError, CommitError, NodeError)

from rhodecode.model.scm import ScmModel
from rhodecode.model.db import Repository

log = logging.getLogger(__name__)


def get_archive_name(db_repo_id, db_repo_name, commit_sha, ext, subrepos=False, path_sha='', with_hash=True):
    # original backward compat name of archive
    clean_name = safe_str(convert_special_chars(db_repo_name).replace('/', '_'))

    # e.g vcsserver-id-abcd-sub-1-abcfdef-archive-all.zip
    # vcsserver-id-abcd-sub-0-abcfdef-COMMIT_SHA-PATH_SHA.zip
    id_sha = sha1_safe(str(db_repo_id))[:4]
    sub_repo = 'sub-1' if subrepos else 'sub-0'
    commit = commit_sha if with_hash else 'archive'
    path_marker = (path_sha if with_hash else '') or 'all'
    archive_name = f'{clean_name}-id-{id_sha}-{sub_repo}-{commit}-{path_marker}{ext}'

    return archive_name


def get_path_sha(at_path):
    return safe_str(sha1_safe(at_path)[:8])


def _get_archive_spec(fname):
    log.debug('Detecting archive spec for: `%s`', fname)

    fileformat = None
    ext = None
    content_type = None
    for a_type, content_type, extension in settings.ARCHIVE_SPECS:

        if fname.endswith(extension):
            fileformat = a_type
            log.debug('archive is of type: %s', fileformat)
            ext = extension
            break

    if not fileformat:
        raise ValueError()

    # left over part of whole fname is the commit
    commit_id = fname[:-len(ext)]

    return commit_id, ext, fileformat, content_type


class RepoFilesView(RepoAppView):

    @staticmethod
    def adjust_file_path_for_svn(f_path, repo):
        """
        Computes the relative path of `f_path`.

        This is mainly based on prefix matching of the recognized tags and
        branches in the underlying repository.
        """
        tags_and_branches = itertools.chain(
            repo.branches.keys(),
            repo.tags.keys())
        tags_and_branches = sorted(tags_and_branches, key=len, reverse=True)

        for name in tags_and_branches:
            if f_path.startswith(f'{name}/'):
                f_path = vcspath.relpath(f_path, name)
                break
        return f_path

    def load_default_context(self):
        c = self._get_local_tmpl_context(include_app_defaults=True)
        c.rhodecode_repo = self.rhodecode_vcs_repo
        c.enable_downloads = self.db_repo.enable_downloads
        return c

    def _ensure_not_locked(self, commit_id='tip'):
        _ = self.request.translate

        repo = self.db_repo
        if repo.enable_locking and repo.locked[0]:
            h.flash(_('This repository has been locked by %s on %s')
                    % (h.person_by_id(repo.locked[0]),
                    h.format_date(h.time_to_datetime(repo.locked[1]))),
                    'warning')
            files_url = h.route_path(
                'repo_files:default_path',
                repo_name=self.db_repo_name, commit_id=commit_id)
            raise HTTPFound(files_url)

    def forbid_non_head(self, is_head, f_path, commit_id='tip', json_mode=False):
        _ = self.request.translate

        if not is_head:
            message = _('Cannot modify file. '
                        'Given commit `{}` is not head of a branch.').format(commit_id)
            h.flash(message, category='warning')

            if json_mode:
                return message

            files_url = h.route_path(
                'repo_files', repo_name=self.db_repo_name, commit_id=commit_id,
                f_path=f_path)
            raise HTTPFound(files_url)

    def check_branch_permission(self, branch_name, commit_id='tip', json_mode=False):
        _ = self.request.translate

        rule, branch_perm = self._rhodecode_user.get_rule_and_branch_permission(
            self.db_repo_name, branch_name)
        if branch_perm and branch_perm not in ['branch.push', 'branch.push_force']:
            message = _('Branch `{}` changes forbidden by rule {}.').format(
                h.escape(branch_name), h.escape(rule))
            h.flash(message, 'warning')

            if json_mode:
                return message

            files_url = h.route_path(
                'repo_files:default_path', repo_name=self.db_repo_name, commit_id=commit_id)

            raise HTTPFound(files_url)

    def _get_commit_and_path(self):
        default_commit_id = self.db_repo.landing_ref_name
        default_f_path = '/'

        commit_id = self.request.matchdict.get(
            'commit_id', default_commit_id)
        f_path = self._get_f_path(self.request.matchdict, default_f_path)
        return commit_id, f_path

    def _get_default_encoding(self, c):
        enc_list = getattr(c, 'default_encodings', [])
        return enc_list[0] if enc_list else 'UTF-8'

    def _get_commit_or_redirect(self, commit_id, redirect_after=True):
        """
        This is a safe way to get commit. If an error occurs it redirects to
        tip with proper message

        :param commit_id: id of commit to fetch
        :param redirect_after: toggle redirection
        """
        _ = self.request.translate

        try:
            return self.rhodecode_vcs_repo.get_commit(commit_id)
        except EmptyRepositoryError:
            if not redirect_after:
                return None

            add_new = upload_new = ""
            if h.HasRepoPermissionAny(
                    'repository.write', 'repository.admin')(self.db_repo_name):
                _url = h.route_path(
                    'repo_files_add_file',
                    repo_name=self.db_repo_name, commit_id=0, f_path='')
                add_new = h.link_to(
                    _('add a new file'), _url, class_="alert-link")

                _url_upld = h.route_path(
                    'repo_files_upload_file',
                    repo_name=self.db_repo_name, commit_id=0, f_path='')
                upload_new = h.link_to(
                    _('upload a new file'), _url_upld, class_="alert-link")

            h.flash(h.literal(
                _('There are no files yet. Click here to %s or %s.') % (add_new, upload_new)), category='warning')
            raise HTTPFound(
                h.route_path('repo_summary', repo_name=self.db_repo_name))

        except (CommitDoesNotExistError, LookupError) as e:
            msg = _('No such commit exists for this repository. Commit: {}').format(commit_id)
            h.flash(msg, category='error')
            raise HTTPNotFound()
        except RepositoryError as e:
            h.flash(h.escape(safe_str(e)), category='error')
            raise HTTPNotFound()

    def _get_filenode_or_redirect(self, commit_obj, path, pre_load=None):
        """
        Returns file_node, if error occurs or given path is directory,
        it'll redirect to top level path
        """
        _ = self.request.translate

        try:
            file_node = commit_obj.get_node(path, pre_load=pre_load)
            if file_node.is_dir():
                raise RepositoryError('The given path is a directory')
        except CommitDoesNotExistError:
            log.exception('No such commit exists for this repository')
            h.flash(_('No such commit exists for this repository'), category='error')
            raise HTTPNotFound()
        except RepositoryError as e:
            log.warning('Repository error while fetching filenode `%s`. Err:%s', path, e)
            h.flash(h.escape(safe_str(e)), category='error')
            raise HTTPNotFound()

        return file_node

    def _is_valid_head(self, commit_id, repo, landing_ref):
        branch_name = sha_commit_id = ''
        is_head = False
        log.debug('Checking if commit_id `%s` is a head for %s.', commit_id, repo)

        for _branch_name, branch_commit_id in repo.branches.items():
            # simple case we pass in branch name, it's a HEAD
            if commit_id == _branch_name:
                is_head = True
                branch_name = _branch_name
                sha_commit_id = branch_commit_id
                break
            # case when we pass in full sha commit_id, which is a head
            elif commit_id == branch_commit_id:
                is_head = True
                branch_name = _branch_name
                sha_commit_id = branch_commit_id
                break

        if h.is_svn(repo) and not repo.is_empty():
            # Note: Subversion only has one head.
            if commit_id == repo.get_commit(commit_idx=-1).raw_id:
                is_head = True
                return branch_name, sha_commit_id, is_head

        # checked branches, means we only need to try to get the branch/commit_sha
        if repo.is_empty():
            is_head = True
            branch_name = landing_ref
            sha_commit_id = EmptyCommit().raw_id
        else:
            commit = repo.get_commit(commit_id=commit_id)
            if commit:
                branch_name = commit.branch
                sha_commit_id = commit.raw_id

        return branch_name, sha_commit_id, is_head

    def _get_tree_at_commit(self, c, commit_id, f_path, full_load=False, at_rev=None):

        repo_id = self.db_repo.repo_id
        force_recache = self.get_recache_flag()

        cache_seconds = safe_int(
            rhodecode.CONFIG.get('rc_cache.cache_repo.expiration_time'))
        cache_on = not force_recache and cache_seconds > 0
        log.debug(
            'Computing FILE TREE for repo_id %s commit_id `%s` and path `%s`'
            'with caching: %s[TTL: %ss]' % (
                repo_id, commit_id, f_path, cache_on, cache_seconds or 0))

        cache_namespace_uid = f'repo.{rc_cache.FILE_TREE_CACHE_VER}.{repo_id}'
        region = rc_cache.get_or_create_region('cache_repo', cache_namespace_uid)

        @region.conditional_cache_on_arguments(namespace=cache_namespace_uid, condition=cache_on)
        def compute_file_tree(_name_hash, _repo_id, _commit_id, _f_path, _full_load, _at_rev):
            log.debug('Generating cached file tree at for repo_id: %s, %s, %s',
                      _repo_id, _commit_id, _f_path)

            c.full_load = _full_load
            return render(
                'rhodecode:templates/files/files_browser_tree.mako',
                self._get_template_context(c), self.request, _at_rev)

        return compute_file_tree(
            self.db_repo.repo_name_hash, self.db_repo.repo_id, commit_id, f_path, full_load, at_rev)

    def create_pure_path(self, *parts):
        # Split paths and sanitize them, removing any ../ etc
        sanitized_path = [
            x for x in pathlib.PurePath(*parts).parts
            if x not in ['.', '..']]

        pure_path = pathlib.PurePath(*sanitized_path)
        return pure_path

    def _is_lf_enabled(self, target_repo):
        lf_enabled = False

        lf_key_for_vcs_map = {
            'hg': 'extensions_largefiles',
            'git': 'vcs_git_lfs_enabled'
        }

        lf_key_for_vcs = lf_key_for_vcs_map.get(target_repo.repo_type)

        if lf_key_for_vcs:
            lf_enabled = self._get_repo_setting(target_repo, lf_key_for_vcs)

        return lf_enabled

    @LoginRequired()
    @HasRepoPermissionAnyDecorator(
        'repository.read', 'repository.write', 'repository.admin')
    def repo_archivefile(self):
        # archive cache config
        from rhodecode import CONFIG
        _ = self.request.translate
        self.load_default_context()
        default_at_path = '/'
        fname = self.request.matchdict['fname']
        subrepos = self.request.GET.get('subrepos') == 'true'
        with_hash = str2bool(self.request.GET.get('with_hash', '1'))
        at_path = self.request.GET.get('at_path') or default_at_path

        if not self.db_repo.enable_downloads:
            return Response(_('Downloads disabled'))

        try:
            commit_id, ext, fileformat, content_type = \
                _get_archive_spec(fname)
        except ValueError:
            return Response(_('Unknown archive type for: `{}`').format(
                h.escape(fname)))

        try:
            commit = self.rhodecode_vcs_repo.get_commit(commit_id)
        except CommitDoesNotExistError:
            return Response(_('Unknown commit_id {}').format(
                h.escape(commit_id)))
        except EmptyRepositoryError:
            return Response(_('Empty repository'))

        # we used a ref, or a shorter version, lets redirect client ot use explicit hash
        if commit_id != commit.raw_id:
            fname=f'{commit.raw_id}{ext}'
            raise HTTPFound(self.request.current_route_path(fname=fname))

        try:
            at_path = commit.get_node(at_path).path or default_at_path
        except Exception:
            return Response(_('No node at path {} for this repository').format(h.escape(at_path)))

        path_sha = get_path_sha(at_path)

        # used for cache etc, consistent unique archive name
        archive_name_key = get_archive_name(
            self.db_repo.repo_id, self.db_repo_name, commit_sha=commit.short_id, ext=ext, subrepos=subrepos,
            path_sha=path_sha, with_hash=True)

        if not with_hash:
            path_sha = ''

        # what end client gets served
        response_archive_name = get_archive_name(
            self.db_repo.repo_id, self.db_repo_name, commit_sha=commit.short_id, ext=ext, subrepos=subrepos,
            path_sha=path_sha, with_hash=with_hash)

        # remove extension from our archive directory name
        archive_dir_name = response_archive_name[:-len(ext)]

        archive_cache_disable = self.request.GET.get('no_cache')

        d_cache = get_archival_cache_store(config=CONFIG)

        # NOTE: we get the config to pass to a call to lazy-init the SAME type of cache on vcsserver
        d_cache_conf = get_archival_config(config=CONFIG)

        reentrant_lock_key = archive_name_key + '.lock'
        with ReentrantLock(d_cache, reentrant_lock_key):
            # This is also a cache key
            use_cached_archive = False
            if archive_name_key in d_cache and not archive_cache_disable:
                reader, tag = d_cache.get(archive_name_key, read=True, tag=True, retry=True)
                use_cached_archive = True
                log.debug('Found cached archive as key=%s tag=%s, serving archive from cache reader=%s',
                          archive_name_key, tag, reader.name)
            else:
                reader = None
                log.debug('Archive with key=%s is not yet cached, creating one now...', archive_name_key)

            # generate new archive, as previous was not found in the cache
            if not reader:

                try:
                    commit.archive_repo(archive_name_key, archive_dir_name=archive_dir_name,
                                        kind=fileformat, subrepos=subrepos,
                                        archive_at_path=at_path, cache_config=d_cache_conf)
                except ImproperArchiveTypeError:
                    return _('Unknown archive type')

            reader, tag = d_cache.get(archive_name_key, read=True, tag=True, retry=True)

        if not reader:
            raise ValueError('archive cache reader is empty, failed to fetch file from distributed archive cache')

        def archive_iterator(_reader, block_size: int = 4096*512):
            # 4096 * 64 = 64KB
            while 1:
                data = _reader.read(block_size)
                if not data:
                    break
                yield data

        response = Response(app_iter=archive_iterator(reader))
        response.content_disposition = f'attachment; filename={response_archive_name}'
        response.content_type = str(content_type)

        try:
            return response
        finally:
            # store download action
            audit_logger.store_web(
                'repo.archive.download', action_data={
                    'user_agent': self.request.user_agent,
                    'archive_name': archive_name_key,
                    'archive_spec': fname,
                    'archive_cached': use_cached_archive},
                user=self._rhodecode_user,
                repo=self.db_repo,
                commit=True
            )

    def _get_file_node(self, commit_id, f_path):
        if commit_id not in ['', None, 'None', '0' * 12, '0' * 40]:
            commit = self.rhodecode_vcs_repo.get_commit(commit_id=commit_id)
            try:
                node = commit.get_node(f_path)
                if node.is_dir():
                    raise NodeError(f'{node} path is a {type(node)} not a file')
            except NodeDoesNotExistError:
                commit = EmptyCommit(
                    commit_id=commit_id,
                    idx=commit.idx,
                    repo=commit.repository,
                    alias=commit.repository.alias,
                    message=commit.message,
                    author=commit.author,
                    date=commit.date)
                node = FileNode(safe_bytes(f_path), b'', commit=commit)
        else:
            commit = EmptyCommit(
                repo=self.rhodecode_vcs_repo,
                alias=self.rhodecode_vcs_repo.alias)
            node = FileNode(safe_bytes(f_path), b'', commit=commit)
        return node

    @LoginRequired()
    @HasRepoPermissionAnyDecorator(
        'repository.read', 'repository.write', 'repository.admin')
    def repo_files_diff(self):
        c = self.load_default_context()
        f_path = self._get_f_path(self.request.matchdict)
        diff1 = self.request.GET.get('diff1', '')
        diff2 = self.request.GET.get('diff2', '')

        path1, diff1 = parse_path_ref(diff1, default_path=f_path)

        ignore_whitespace = str2bool(self.request.GET.get('ignorews'))
        line_context = self.request.GET.get('context', 3)

        if not any((diff1, diff2)):
            h.flash(
                'Need query parameter "diff1" or "diff2" to generate a diff.',
                category='error')
            raise HTTPBadRequest()

        c.action = self.request.GET.get('diff')
        if c.action not in ['download', 'raw']:
            compare_url = h.route_path(
                'repo_compare',
                repo_name=self.db_repo_name,
                source_ref_type='rev',
                source_ref=diff1,
                target_repo=self.db_repo_name,
                target_ref_type='rev',
                target_ref=diff2,
                _query=dict(f_path=f_path))
            # redirect to new view if we render diff
            raise HTTPFound(compare_url)

        try:
            node1 = self._get_file_node(diff1, path1)
            node2 = self._get_file_node(diff2, f_path)
        except (RepositoryError, NodeError):
            log.exception("Exception while trying to get node from repository")
            raise HTTPFound(
                h.route_path('repo_files', repo_name=self.db_repo_name,
                             commit_id='tip', f_path=f_path))

        if all(isinstance(node.commit, EmptyCommit)
               for node in (node1, node2)):
            raise HTTPNotFound()

        c.commit_1 = node1.commit
        c.commit_2 = node2.commit

        if c.action == 'download':
            _diff = diffs.get_gitdiff(node1, node2,
                                      ignore_whitespace=ignore_whitespace,
                                      context=line_context)
            # NOTE: this was using diff_format='gitdiff'
            diff = diffs.DiffProcessor(_diff, diff_format='newdiff')

            response = Response(self.path_filter.get_raw_patch(diff))
            response.content_type = 'text/plain'
            response.content_disposition = (
                f'attachment; filename={f_path}_{diff1}_vs_{diff2}.diff'
            )
            charset = self._get_default_encoding(c)
            if charset:
                response.charset = charset
            return response

        elif c.action == 'raw':
            _diff = diffs.get_gitdiff(node1, node2,
                                      ignore_whitespace=ignore_whitespace,
                                      context=line_context)
            # NOTE: this was using diff_format='gitdiff'
            diff = diffs.DiffProcessor(_diff, diff_format='newdiff')

            response = Response(self.path_filter.get_raw_patch(diff))
            response.content_type = 'text/plain'
            charset = self._get_default_encoding(c)
            if charset:
                response.charset = charset
            return response

        # in case we ever end up here
        raise HTTPNotFound()

    @LoginRequired()
    @HasRepoPermissionAnyDecorator(
        'repository.read', 'repository.write', 'repository.admin')
    def repo_files_diff_2way_redirect(self):
        """
        Kept only to make OLD links work
        """
        f_path = self._get_f_path_unchecked(self.request.matchdict)
        diff1 = self.request.GET.get('diff1', '')
        diff2 = self.request.GET.get('diff2', '')

        if not any((diff1, diff2)):
            h.flash(
                'Need query parameter "diff1" or "diff2" to generate a diff.',
                category='error')
            raise HTTPBadRequest()

        compare_url = h.route_path(
            'repo_compare',
            repo_name=self.db_repo_name,
            source_ref_type='rev',
            source_ref=diff1,
            target_ref_type='rev',
            target_ref=diff2,
            _query=dict(f_path=f_path, diffmode='sideside',
                        target_repo=self.db_repo_name,))
        raise HTTPFound(compare_url)

    @LoginRequired()
    def repo_files_default_commit_redirect(self):
        """
        Special page that redirects to the landing page of files based on the default
        commit for repository
        """
        c = self.load_default_context()
        ref_name = c.rhodecode_db_repo.landing_ref_name
        landing_url = h.repo_files_by_ref_url(
            c.rhodecode_db_repo.repo_name,
            c.rhodecode_db_repo.repo_type,
            f_path='',
            ref_name=ref_name,
            commit_id='tip',
            query=dict(at=ref_name)
        )

        raise HTTPFound(landing_url)

    @LoginRequired()
    @HasRepoPermissionAnyDecorator(
        'repository.read', 'repository.write', 'repository.admin')
    def repo_files(self):
        c = self.load_default_context()

        view_name = getattr(self.request.matched_route, 'name', None)

        c.annotate = view_name == 'repo_files:annotated'
        # default is false, but .rst/.md files later are auto rendered, we can
        # overwrite auto rendering by setting this GET flag
        c.renderer = view_name == 'repo_files:rendered' or not self.request.GET.get('no-render', False)

        commit_id, f_path = self._get_commit_and_path()

        c.commit = self._get_commit_or_redirect(commit_id)
        c.branch = self.request.GET.get('branch', None)
        c.f_path = f_path
        at_rev = self.request.GET.get('at')

        # prev link
        try:
            prev_commit = c.commit.prev(c.branch)
            c.prev_commit = prev_commit
            c.url_prev = h.route_path(
                'repo_files', repo_name=self.db_repo_name,
                commit_id=prev_commit.raw_id, f_path=f_path)
            if c.branch:
                c.url_prev += '?branch=%s' % c.branch
        except (CommitDoesNotExistError, VCSError):
            c.url_prev = '#'
            c.prev_commit = EmptyCommit()

        # next link
        try:
            next_commit = c.commit.next(c.branch)
            c.next_commit = next_commit
            c.url_next = h.route_path(
                'repo_files', repo_name=self.db_repo_name,
                commit_id=next_commit.raw_id, f_path=f_path)
            if c.branch:
                c.url_next += '?branch=%s' % c.branch
        except (CommitDoesNotExistError, VCSError):
            c.url_next = '#'
            c.next_commit = EmptyCommit()

        # files or dirs
        try:
            c.file = c.commit.get_node(f_path, pre_load=['is_binary', 'size', 'data'])

            c.file_author = True
            c.file_tree = ''

            # load file content
            if c.file.is_file():
                c.lf_node = {}

                has_lf_enabled = self._is_lf_enabled(self.db_repo)
                if has_lf_enabled:
                    c.lf_node = c.file.get_largefile_node()

                c.file_source_page = 'true'
                c.file_last_commit = c.file.last_commit

                c.file_size_too_big = c.file.size > c.visual.cut_off_limit_file

                if not (c.file_size_too_big or c.file.is_binary):
                    if c.annotate:  # annotation has precedence over renderer
                        c.annotated_lines = filenode_as_annotated_lines_tokens(
                            c.file
                        )
                    else:
                        c.renderer = (
                            c.renderer and h.renderer_from_filename(c.file.path)
                        )
                        if not c.renderer:
                            c.lines = filenode_as_lines_tokens(c.file)

                _branch_name, _sha_commit_id, is_head = \
                    self._is_valid_head(commit_id, self.rhodecode_vcs_repo,
                                        landing_ref=self.db_repo.landing_ref_name)
                c.on_branch_head = is_head

                branch = c.commit.branch if (
                    c.commit.branch and '/' not in c.commit.branch) else None
                c.branch_or_raw_id = branch or c.commit.raw_id
                c.branch_name = c.commit.branch or h.short_id(c.commit.raw_id)

                author = c.file_last_commit.author
                c.authors = [[
                    h.email(author),
                    h.person(author, 'username_or_name_or_email'),
                    1
                ]]

            else:  # load tree content at path
                c.file_source_page = 'false'
                c.authors = []
                # this loads a simple tree without metadata to speed things up
                # later via ajax we call repo_nodetree_full and fetch whole
                c.file_tree = self._get_tree_at_commit(c, c.commit.raw_id, f_path, at_rev=at_rev)

                c.readme_data, c.readme_file = \
                    self._get_readme_data(self.db_repo, c.visual.default_renderer,
                                          c.commit.raw_id, f_path)

        except RepositoryError as e:
            h.flash(h.escape(safe_str(e)), category='error')
            raise HTTPNotFound()

        if self.request.environ.get('HTTP_X_PJAX'):
            html = render('rhodecode:templates/files/files_pjax.mako',
                          self._get_template_context(c), self.request)
        else:
            html = render('rhodecode:templates/files/files.mako',
                          self._get_template_context(c), self.request)
        return Response(html)

    @HasRepoPermissionAnyDecorator(
        'repository.read', 'repository.write', 'repository.admin')
    def repo_files_annotated_previous(self):
        self.load_default_context()

        commit_id, f_path = self._get_commit_and_path()
        commit = self._get_commit_or_redirect(commit_id)
        prev_commit_id = commit.raw_id
        line_anchor = self.request.GET.get('line_anchor')
        is_file = False
        try:
            _file = commit.get_node(f_path)
            is_file = _file.is_file()
        except (NodeDoesNotExistError, CommitDoesNotExistError, VCSError):
            pass

        if is_file:
            history = commit.get_path_history(f_path)
            prev_commit_id = history[1].raw_id \
                if len(history) > 1 else prev_commit_id
        prev_url = h.route_path(
            'repo_files:annotated', repo_name=self.db_repo_name,
            commit_id=prev_commit_id, f_path=f_path,
            _anchor=f'L{line_anchor}')

        raise HTTPFound(prev_url)

    @LoginRequired()
    @HasRepoPermissionAnyDecorator(
        'repository.read', 'repository.write', 'repository.admin')
    def repo_nodetree_full(self):
        """
        Returns rendered html of file tree that contains commit date,
        author, commit_id for the specified combination of
        repo, commit_id and file path
        """
        c = self.load_default_context()

        commit_id, f_path = self._get_commit_and_path()
        commit = self._get_commit_or_redirect(commit_id)
        try:
            dir_node = commit.get_node(f_path)
        except RepositoryError as e:
            return Response(f'error: {h.escape(safe_str(e))}')

        if dir_node.is_file():
            return Response('')

        c.file = dir_node
        c.commit = commit
        at_rev = self.request.GET.get('at')

        html = self._get_tree_at_commit(
            c, commit.raw_id, dir_node.path, full_load=True, at_rev=at_rev)

        return Response(html)

    def _get_attachement_headers(self, f_path):
        f_name = safe_str(f_path.split(Repository.NAME_SEP)[-1])
        safe_path = f_name.replace('"', '\\"')
        encoded_path = urllib.parse.quote(f_name)

        return "attachment; " \
               "filename=\"{}\"; " \
               "filename*=UTF-8\'\'{}".format(safe_path, encoded_path)

    @LoginRequired()
    @HasRepoPermissionAnyDecorator(
        'repository.read', 'repository.write', 'repository.admin')
    def repo_file_raw(self):
        """
        Action for show as raw, some mimetypes are "rendered",
        those include images, icons.
        """
        c = self.load_default_context()

        commit_id, f_path = self._get_commit_and_path()
        commit = self._get_commit_or_redirect(commit_id)
        file_node = self._get_filenode_or_redirect(commit, f_path)

        raw_mimetype_mapping = {
            # map original mimetype to a mimetype used for "show as raw"
            # you can also provide a content-disposition to override the
            # default "attachment" disposition.
            # orig_type: (new_type, new_dispo)

            # show images inline:
            # Do not re-add SVG: it is unsafe and permits XSS attacks. One can
            # for example render an SVG with javascript inside or even render
            # HTML.
            'image/x-icon': ('image/x-icon', 'inline'),
            'image/png': ('image/png', 'inline'),
            'image/gif': ('image/gif', 'inline'),
            'image/jpeg': ('image/jpeg', 'inline'),
            'application/pdf': ('application/pdf', 'inline'),
        }

        mimetype = file_node.mimetype
        try:
            mimetype, disposition = raw_mimetype_mapping[mimetype]
        except KeyError:
            # we don't know anything special about this, handle it safely
            if file_node.is_binary:
                # do same as download raw for binary files
                mimetype, disposition = 'application/octet-stream', 'attachment'
            else:
                # do not just use the original mimetype, but force text/plain,
                # otherwise it would serve text/html and that might be unsafe.
                # Note: underlying vcs library fakes text/plain mimetype if the
                # mimetype can not be determined and it thinks it is not
                # binary.This might lead to erroneous text display in some
                # cases, but helps in other cases, like with text files
                # without extension.
                mimetype, disposition = 'text/plain', 'inline'

        if disposition == 'attachment':
            disposition = self._get_attachement_headers(f_path)

        stream_content = file_node.stream_bytes()

        response = Response(app_iter=stream_content)
        response.content_disposition = disposition
        response.content_type = mimetype

        charset = self._get_default_encoding(c)
        if charset:
            response.charset = charset

        return response

    @LoginRequired()
    @HasRepoPermissionAnyDecorator(
        'repository.read', 'repository.write', 'repository.admin')
    def repo_file_download(self):
        c = self.load_default_context()

        commit_id, f_path = self._get_commit_and_path()
        commit = self._get_commit_or_redirect(commit_id)
        file_node = self._get_filenode_or_redirect(commit, f_path)

        if self.request.GET.get('lf'):
            # only if lf get flag is passed, we download this file
            # as LFS/Largefile
            lf_node = file_node.get_largefile_node()
            if lf_node:
                # overwrite our pointer with the REAL large-file
                file_node = lf_node

        disposition = self._get_attachement_headers(f_path)

        stream_content = file_node.stream_bytes()

        response = Response(app_iter=stream_content)
        response.content_disposition = disposition
        response.content_type = file_node.mimetype

        charset = self._get_default_encoding(c)
        if charset:
            response.charset = charset

        return response

    def _get_nodelist_at_commit(self, repo_name, repo_id, commit_id, f_path):

        cache_seconds = safe_int(
            rhodecode.CONFIG.get('rc_cache.cache_repo.expiration_time'))
        cache_on = cache_seconds > 0
        log.debug(
            'Computing FILE SEARCH for repo_id %s commit_id `%s` and path `%s`'
            'with caching: %s[TTL: %ss]' % (
                repo_id, commit_id, f_path, cache_on, cache_seconds or 0))

        cache_namespace_uid = f'repo.{repo_id}'
        region = rc_cache.get_or_create_region('cache_repo', cache_namespace_uid)

        @region.conditional_cache_on_arguments(namespace=cache_namespace_uid, condition=cache_on)
        def compute_file_search(_name_hash, _repo_id, _commit_id, _f_path):
            log.debug('Generating cached nodelist for repo_id:%s, %s, %s',
                      _repo_id, commit_id, f_path)
            try:
                _d, _f = ScmModel().get_quick_filter_nodes(repo_name, _commit_id, _f_path)
            except (RepositoryError, CommitDoesNotExistError, Exception) as e:
                log.exception(safe_str(e))
                h.flash(h.escape(safe_str(e)), category='error')
                raise HTTPFound(h.route_path(
                    'repo_files', repo_name=self.db_repo_name,
                    commit_id='tip', f_path='/'))

            return _d + _f

        result = compute_file_search(self.db_repo.repo_name_hash, self.db_repo.repo_id,
                                     commit_id, f_path)
        return filter(lambda n: self.path_filter.path_access_allowed(n['name']), result)

    @LoginRequired()
    @HasRepoPermissionAnyDecorator(
        'repository.read', 'repository.write', 'repository.admin')
    def repo_nodelist(self):
        self.load_default_context()

        commit_id, f_path = self._get_commit_and_path()
        commit = self._get_commit_or_redirect(commit_id)

        metadata = self._get_nodelist_at_commit(
            self.db_repo_name, self.db_repo.repo_id, commit.raw_id, f_path)
        return {'nodes': [x for x in metadata]}

    def _create_references(self, branches_or_tags, symbolic_reference, f_path, ref_type):
        items = []
        for name, commit_id in branches_or_tags.items():
            sym_ref = symbolic_reference(commit_id, name, f_path, ref_type)
            items.append((sym_ref, name, ref_type))
        return items

    def _symbolic_reference(self, commit_id, name, f_path, ref_type):
        return commit_id

    def _symbolic_reference_svn(self, commit_id, name, f_path, ref_type):
        return commit_id

        # NOTE(dan): old code we used in "diff" mode compare
        new_f_path = vcspath.join(name, f_path)
        return f'{new_f_path}@{commit_id}'

    def _get_node_history(self, commit_obj, f_path, commits=None):
        """
        get commit history for given node

        :param commit_obj: commit to calculate history
        :param f_path: path for node to calculate history for
        :param commits: if passed don't calculate history and take
            commits defined in this list
        """
        _ = self.request.translate

        # calculate history based on tip
        tip = self.rhodecode_vcs_repo.get_commit()
        if commits is None:
            pre_load = ["author", "branch"]
            try:
                commits = tip.get_path_history(f_path, pre_load=pre_load)
            except (NodeDoesNotExistError, CommitError):
                # this node is not present at tip!
                commits = commit_obj.get_path_history(f_path, pre_load=pre_load)

        history = []
        commits_group = ([], _("Changesets"))
        for commit in commits:
            branch = ' (%s)' % commit.branch if commit.branch else ''
            n_desc = f'r{commit.idx}:{commit.short_id}{branch}'
            commits_group[0].append((commit.raw_id, n_desc, 'sha'))
        history.append(commits_group)

        symbolic_reference = self._symbolic_reference

        if self.rhodecode_vcs_repo.alias == 'svn':
            adjusted_f_path = RepoFilesView.adjust_file_path_for_svn(
                f_path, self.rhodecode_vcs_repo)
            if adjusted_f_path != f_path:
                log.debug(
                    'Recognized svn tag or branch in file "%s", using svn '
                    'specific symbolic references', f_path)
                f_path = adjusted_f_path
                symbolic_reference = self._symbolic_reference_svn

        branches = self._create_references(
            self.rhodecode_vcs_repo.branches, symbolic_reference, f_path, 'branch')
        branches_group = (branches, _("Branches"))

        tags = self._create_references(
            self.rhodecode_vcs_repo.tags, symbolic_reference, f_path, 'tag')
        tags_group = (tags, _("Tags"))

        history.append(branches_group)
        history.append(tags_group)

        return history, commits

    @LoginRequired()
    @HasRepoPermissionAnyDecorator(
        'repository.read', 'repository.write', 'repository.admin')
    def repo_file_history(self):
        self.load_default_context()

        commit_id, f_path = self._get_commit_and_path()
        commit = self._get_commit_or_redirect(commit_id)
        file_node = self._get_filenode_or_redirect(commit, f_path)

        if file_node.is_file():
            file_history, _hist = self._get_node_history(commit, f_path)

            res = []
            for section_items, section in file_history:
                items = []
                for obj_id, obj_text, obj_type in section_items:
                    at_rev = ''
                    if obj_type in ['branch', 'bookmark', 'tag']:
                        at_rev = obj_text
                    entry = {
                        'id': obj_id,
                        'text': obj_text,
                        'type': obj_type,
                        'at_rev': at_rev
                    }

                    items.append(entry)

                res.append({
                    'text': section,
                    'children': items
                })

            data = {
                'more': False,
                'results': res
            }
            return data

        log.warning('Cannot fetch history for directory')
        raise HTTPBadRequest()

    @LoginRequired()
    @HasRepoPermissionAnyDecorator(
        'repository.read', 'repository.write', 'repository.admin')
    def repo_file_authors(self):
        c = self.load_default_context()

        commit_id, f_path = self._get_commit_and_path()
        commit = self._get_commit_or_redirect(commit_id)
        file_node = self._get_filenode_or_redirect(commit, f_path)

        if not file_node.is_file():
            raise HTTPBadRequest()

        c.file_last_commit = file_node.last_commit
        if self.request.GET.get('annotate') == '1':
            # use _hist from annotation if annotation mode is on
            commit_ids = {x[1] for x in file_node.annotate}
            _hist = (
                self.rhodecode_vcs_repo.get_commit(commit_id)
                for commit_id in commit_ids)
        else:
            _f_history, _hist = self._get_node_history(commit, f_path)
        c.file_author = False

        unique = collections.OrderedDict()
        for commit in _hist:
            author = commit.author
            if author not in unique:
                unique[commit.author] = [
                    h.email(author),
                    h.person(author, 'username_or_name_or_email'),
                    1  # counter
                ]

            else:
                # increase counter
                unique[commit.author][2] += 1

        c.authors = [val for val in unique.values()]

        return self._get_template_context(c)

    @LoginRequired()
    @HasRepoPermissionAnyDecorator('repository.write', 'repository.admin')
    def repo_files_check_head(self):
        self.load_default_context()

        commit_id, f_path = self._get_commit_and_path()
        _branch_name, _sha_commit_id, is_head = \
            self._is_valid_head(commit_id, self.rhodecode_vcs_repo,
                                landing_ref=self.db_repo.landing_ref_name)

        new_path = self.request.POST.get('path')
        operation = self.request.POST.get('operation')
        path_exist = ''

        if new_path and operation in ['create', 'upload']:
            new_f_path = os.path.join(f_path.lstrip('/'), new_path)
            try:
                commit_obj = self.rhodecode_vcs_repo.get_commit(commit_id)
                # NOTE(dan): construct whole path without leading /
                file_node = commit_obj.get_node(new_f_path)
                if file_node is not None:
                    path_exist = new_f_path
            except EmptyRepositoryError:
                pass
            except Exception:
                pass

        return {
            'branch': _branch_name,
            'sha': _sha_commit_id,
            'is_head': is_head,
            'path_exists': path_exist
        }

    @LoginRequired()
    @HasRepoPermissionAnyDecorator('repository.write', 'repository.admin')
    def repo_files_remove_file(self):
        _ = self.request.translate
        c = self.load_default_context()
        commit_id, f_path = self._get_commit_and_path()

        self._ensure_not_locked()
        _branch_name, _sha_commit_id, is_head = \
            self._is_valid_head(commit_id, self.rhodecode_vcs_repo,
                                landing_ref=self.db_repo.landing_ref_name)

        self.forbid_non_head(is_head, f_path)
        self.check_branch_permission(_branch_name)

        c.commit = self._get_commit_or_redirect(commit_id)
        c.file = self._get_filenode_or_redirect(c.commit, f_path)

        c.default_message = _(
            'Deleted file {} via RhodeCode Enterprise').format(f_path)
        c.f_path = f_path

        return self._get_template_context(c)

    @LoginRequired()
    @HasRepoPermissionAnyDecorator('repository.write', 'repository.admin')
    @CSRFRequired()
    def repo_files_delete_file(self):
        _ = self.request.translate

        c = self.load_default_context()
        commit_id, f_path = self._get_commit_and_path()

        self._ensure_not_locked()
        _branch_name, _sha_commit_id, is_head = \
            self._is_valid_head(commit_id, self.rhodecode_vcs_repo,
                                landing_ref=self.db_repo.landing_ref_name)

        self.forbid_non_head(is_head, f_path)
        self.check_branch_permission(_branch_name)

        c.commit = self._get_commit_or_redirect(commit_id)
        c.file = self._get_filenode_or_redirect(c.commit, f_path)

        c.default_message = _(
            'Deleted file {} via RhodeCode Enterprise').format(f_path)
        c.f_path = f_path
        node_path = f_path
        author = self._rhodecode_db_user.full_contact
        message = self.request.POST.get('message') or c.default_message
        try:
            nodes = {
                safe_bytes(node_path): {
                    'content': b''
                }
            }
            ScmModel().delete_nodes(
                user=self._rhodecode_db_user.user_id, repo=self.db_repo,
                message=message,
                nodes=nodes,
                parent_commit=c.commit,
                author=author,
            )

            h.flash(
                _('Successfully deleted file `{}`').format(
                    h.escape(f_path)), category='success')
        except Exception:
            log.exception('Error during commit operation')
            h.flash(_('Error occurred during commit'), category='error')
        raise HTTPFound(
            h.route_path('repo_commit', repo_name=self.db_repo_name,
                         commit_id='tip'))

    @LoginRequired()
    @HasRepoPermissionAnyDecorator('repository.write', 'repository.admin')
    def repo_files_edit_file(self):
        _ = self.request.translate
        c = self.load_default_context()
        commit_id, f_path = self._get_commit_and_path()

        self._ensure_not_locked()
        _branch_name, _sha_commit_id, is_head = \
            self._is_valid_head(commit_id, self.rhodecode_vcs_repo,
                                landing_ref=self.db_repo.landing_ref_name)

        self.forbid_non_head(is_head, f_path, commit_id=commit_id)
        self.check_branch_permission(_branch_name, commit_id=commit_id)

        c.commit = self._get_commit_or_redirect(commit_id)
        c.file = self._get_filenode_or_redirect(c.commit, f_path)

        if c.file.is_binary:
            files_url = h.route_path(
                'repo_files',
                repo_name=self.db_repo_name,
                commit_id=c.commit.raw_id, f_path=f_path)
            raise HTTPFound(files_url)

        c.default_message = _('Edited file {} via RhodeCode Enterprise').format(f_path)
        c.f_path = f_path

        return self._get_template_context(c)

    @LoginRequired()
    @HasRepoPermissionAnyDecorator('repository.write', 'repository.admin')
    @CSRFRequired()
    def repo_files_update_file(self):
        _ = self.request.translate
        c = self.load_default_context()
        commit_id, f_path = self._get_commit_and_path()

        self._ensure_not_locked()

        c.commit = self._get_commit_or_redirect(commit_id)
        c.file = self._get_filenode_or_redirect(c.commit, f_path)

        if c.file.is_binary:
            raise HTTPFound(h.route_path('repo_files', repo_name=self.db_repo_name,
                                         commit_id=c.commit.raw_id, f_path=f_path))

        _branch_name, _sha_commit_id, is_head = \
            self._is_valid_head(commit_id, self.rhodecode_vcs_repo,
                                landing_ref=self.db_repo.landing_ref_name)

        self.forbid_non_head(is_head, f_path, commit_id=commit_id)
        self.check_branch_permission(_branch_name, commit_id=commit_id)

        c.default_message = _('Edited file {} via RhodeCode Enterprise').format(f_path)
        c.f_path = f_path

        old_content = c.file.str_content
        sl = old_content.splitlines(1)
        first_line = sl[0] if sl else ''

        r_post = self.request.POST
        # line endings:  0 - Unix, 1 - Mac, 2 - DOS
        line_ending_mode = detect_mode(first_line, 0)
        content = convert_line_endings(r_post.get('content', ''), line_ending_mode)

        message = r_post.get('message') or c.default_message

        org_node_path = c.file.str_path
        filename = r_post['filename']

        root_path = c.file.dir_path
        pure_path = self.create_pure_path(root_path, filename)
        node_path = pure_path.as_posix()

        default_redirect_url = h.route_path('repo_commit', repo_name=self.db_repo_name,
                                            commit_id=commit_id)
        if content == old_content and node_path == org_node_path:
            h.flash(_('No changes detected on {}').format(h.escape(org_node_path)),
                    category='warning')
            raise HTTPFound(default_redirect_url)

        try:
            mapping = {
                c.file.bytes_path: {
                    'org_filename': org_node_path,
                    'filename': safe_bytes(node_path),
                    'content': safe_bytes(content),
                    'lexer': '',
                    'op': 'mod',
                    'mode': c.file.mode
                }
            }

            commit = ScmModel().update_nodes(
                user=self._rhodecode_db_user.user_id,
                repo=self.db_repo,
                message=message,
                nodes=mapping,
                parent_commit=c.commit,
            )

            h.flash(_('Successfully committed changes to file `{}`').format(
                    h.escape(f_path)), category='success')
            default_redirect_url = h.route_path(
                'repo_commit', repo_name=self.db_repo_name, commit_id=commit.raw_id)

        except Exception:
            log.exception('Error occurred during commit')
            h.flash(_('Error occurred during commit'), category='error')

        raise HTTPFound(default_redirect_url)

    @LoginRequired()
    @HasRepoPermissionAnyDecorator('repository.write', 'repository.admin')
    def repo_files_add_file(self):
        _ = self.request.translate
        c = self.load_default_context()
        commit_id, f_path = self._get_commit_and_path()

        self._ensure_not_locked()

        c.commit = self._get_commit_or_redirect(commit_id, redirect_after=False)
        if c.commit is None:
            c.commit = EmptyCommit(alias=self.rhodecode_vcs_repo.alias)

        if self.rhodecode_vcs_repo.is_empty():
            # for empty repository we cannot check for current branch, we rely on
            # c.commit.branch instead
            _branch_name, _sha_commit_id, is_head = c.commit.branch, '', True
        else:
            _branch_name, _sha_commit_id, is_head = \
                self._is_valid_head(commit_id, self.rhodecode_vcs_repo,
                                    landing_ref=self.db_repo.landing_ref_name)

        self.forbid_non_head(is_head, f_path, commit_id=commit_id)
        self.check_branch_permission(_branch_name, commit_id=commit_id)

        c.default_message = (_('Added file via RhodeCode Enterprise'))
        c.f_path = f_path.lstrip('/')  # ensure not relative path

        return self._get_template_context(c)

    @LoginRequired()
    @HasRepoPermissionAnyDecorator('repository.write', 'repository.admin')
    @CSRFRequired()
    def repo_files_create_file(self):
        _ = self.request.translate
        c = self.load_default_context()
        commit_id, f_path = self._get_commit_and_path()

        self._ensure_not_locked()

        c.commit = self._get_commit_or_redirect(commit_id, redirect_after=False)
        if c.commit is None:
            c.commit = EmptyCommit(alias=self.rhodecode_vcs_repo.alias)

        # calculate redirect URL
        if self.rhodecode_vcs_repo.is_empty():
            default_redirect_url = h.route_path(
                'repo_summary', repo_name=self.db_repo_name)
        else:
            default_redirect_url = h.route_path(
                'repo_commit', repo_name=self.db_repo_name, commit_id='tip')

        if self.rhodecode_vcs_repo.is_empty():
            # for empty repository we cannot check for current branch, we rely on
            # c.commit.branch instead
            _branch_name, _sha_commit_id, is_head = c.commit.branch, '', True
        else:
            _branch_name, _sha_commit_id, is_head = \
                self._is_valid_head(commit_id, self.rhodecode_vcs_repo,
                                    landing_ref=self.db_repo.landing_ref_name)

        self.forbid_non_head(is_head, f_path, commit_id=commit_id)
        self.check_branch_permission(_branch_name, commit_id=commit_id)

        c.default_message = (_('Added file via RhodeCode Enterprise'))
        c.f_path = f_path

        r_post = self.request.POST
        message = r_post.get('message') or c.default_message
        filename = r_post.get('filename')
        unix_mode = 0

        if not filename:
            # If there's no commit, redirect to repo summary
            if type(c.commit) is EmptyCommit:
                redirect_url = h.route_path(
                    'repo_summary', repo_name=self.db_repo_name)
            else:
                redirect_url = default_redirect_url
            h.flash(_('No filename specified'), category='warning')
            raise HTTPFound(redirect_url)

        root_path = f_path
        pure_path = self.create_pure_path(root_path, filename)
        node_path = pure_path.as_posix().lstrip('/')

        author = self._rhodecode_db_user.full_contact
        content = convert_line_endings(r_post.get('content', ''), unix_mode)
        nodes = {
            safe_bytes(node_path): {
                'content': safe_bytes(content)
            }
        }

        try:

            commit = ScmModel().create_nodes(
                user=self._rhodecode_db_user.user_id,
                repo=self.db_repo,
                message=message,
                nodes=nodes,
                parent_commit=c.commit,
                author=author,
            )

            h.flash(_('Successfully committed new file `{}`').format(
                    h.escape(node_path)), category='success')

            default_redirect_url = h.route_path(
                'repo_commit', repo_name=self.db_repo_name, commit_id=commit.raw_id)

        except NonRelativePathError:
            log.exception('Non Relative path found')
            h.flash(_('The location specified must be a relative path and must not '
                      'contain .. in the path'), category='warning')
            raise HTTPFound(default_redirect_url)
        except (NodeError, NodeAlreadyExistsError) as e:
            h.flash(h.escape(safe_str(e)), category='error')
        except Exception:
            log.exception('Error occurred during commit')
            h.flash(_('Error occurred during commit'), category='error')

        raise HTTPFound(default_redirect_url)

    @LoginRequired()
    @HasRepoPermissionAnyDecorator('repository.write', 'repository.admin')
    @CSRFRequired()
    def repo_files_upload_file(self):
        _ = self.request.translate
        c = self.load_default_context()
        commit_id, f_path = self._get_commit_and_path()

        self._ensure_not_locked()

        c.commit = self._get_commit_or_redirect(commit_id, redirect_after=False)
        if c.commit is None:
            c.commit = EmptyCommit(alias=self.rhodecode_vcs_repo.alias)

        # calculate redirect URL
        if self.rhodecode_vcs_repo.is_empty():
            default_redirect_url = h.route_path(
                'repo_summary', repo_name=self.db_repo_name)
        else:
            default_redirect_url = h.route_path(
                'repo_commit', repo_name=self.db_repo_name, commit_id='tip')

        if self.rhodecode_vcs_repo.is_empty():
            # for empty repository we cannot check for current branch, we rely on
            # c.commit.branch instead
            _branch_name, _sha_commit_id, is_head = c.commit.branch, '', True
        else:
            _branch_name, _sha_commit_id, is_head = \
                self._is_valid_head(commit_id, self.rhodecode_vcs_repo,
                                    landing_ref=self.db_repo.landing_ref_name)

        error = self.forbid_non_head(is_head, f_path, json_mode=True)
        if error:
            return {
                'error': error,
                'redirect_url': default_redirect_url
            }
        error = self.check_branch_permission(_branch_name, json_mode=True)
        if error:
            return {
                'error': error,
                'redirect_url': default_redirect_url
            }

        c.default_message = (_('Uploaded file via RhodeCode Enterprise'))
        c.f_path = f_path

        r_post = self.request.POST

        message = c.default_message
        user_message = r_post.getall('message')
        if isinstance(user_message, list) and user_message:
            # we take the first from duplicated results if it's not empty
            message = user_message[0] if user_message[0] else message

        nodes = {}

        for file_obj in r_post.getall('files_upload') or []:
            content = file_obj.file
            filename = file_obj.filename

            root_path = f_path
            pure_path = self.create_pure_path(root_path, filename)
            node_path = pure_path.as_posix().lstrip('/')

            nodes[safe_bytes(node_path)] = {
                'content': content
            }

        if not nodes:
            error = 'missing files'
            return {
                'error': error,
                'redirect_url': default_redirect_url
            }

        author = self._rhodecode_db_user.full_contact

        try:
            commit = ScmModel().create_nodes(
                user=self._rhodecode_db_user.user_id,
                repo=self.db_repo,
                message=message,
                nodes=nodes,
                parent_commit=c.commit,
                author=author,
            )
            if len(nodes) == 1:
                flash_message = _('Successfully committed {} new files').format(len(nodes))
            else:
                flash_message = _('Successfully committed 1 new file')

            h.flash(flash_message, category='success')

            default_redirect_url = h.route_path(
                'repo_commit', repo_name=self.db_repo_name, commit_id=commit.raw_id)

        except NonRelativePathError:
            log.exception('Non Relative path found')
            error = _('The location specified must be a relative path and must not '
                      'contain .. in the path')
            h.flash(error, category='warning')

            return {
                'error': error,
                'redirect_url': default_redirect_url
            }
        except (NodeError, NodeAlreadyExistsError) as e:
            error = h.escape(e)
            h.flash(error, category='error')

            return {
                'error': error,
                'redirect_url': default_redirect_url
            }
        except Exception:
            log.exception('Error occurred during commit')
            error = _('Error occurred during commit')
            h.flash(error, category='error')
            return {
                'error': error,
                'redirect_url': default_redirect_url
            }

        return {
            'error': None,
            'redirect_url': default_redirect_url
        }