code + tests

.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*,cover
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2015 Thumbor Community Extensions
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

setup.cfg

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+[metadata]
+description-file = README.md

setup.py

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+# -*- coding: utf-8 -*-
+
+from setuptools import setup
+
+
+setup(
+    name='tc_video',
+    version='0.1.0',
+    url='http://github.com/thumbor_community/video',
+    license='MIT',
+    author='Thumbor Community',
+    description='Thumbor community video extensions',
+    packages=['tc_video'],
+    include_package_data=True,
+    zip_safe=False,
+    platforms='any',
+    install_requires=[
+        'thumbor>=5.0.6',
+    ],
+    extras_require={
+        'tests': [
+            'pyvows',
+            'coverage',
+        ],
+    },
+    classifiers=[
+        'Development Status :: 4 - Beta',
+        'Intended Audience :: Developers',
+        'License :: OSI Approved :: MIT License',
+        'Operating System :: OS Independent',
+        'Programming Language :: Python',
+        'Topic :: Software Development :: Libraries :: Python Modules'
+    ]
+)

tc_video/loaders/file_loader.py

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+# coding: utf-8
+
+# Copyright (c) 2015, thumbor-community
+# Use of this source code is governed by the MIT license that can be
+# found in the LICENSE file.
+
+from thumbor.loaders import LoaderResult
+from datetime import datetime
+from os import fstat
+from os.path import join, exists, abspath
+from urllib import unquote
+from tornado.concurrent import return_future
+
+
+@return_future
+def load(context, path, callback):
+    """
+    Loads a file. In case the requested file is a video, instead of loading
+    its contents this method extracts a frame from the video using ffmpeg,
+    and returns the image.
+    :param Context context: Thumbor's context
+    :param string url: Path to load
+    :param callable callback: Callback method once done
+    """
+    file_path = join(context.config.FILE_LOADER_ROOT_PATH.rstrip('/'), unquote(path).lstrip('/'))
+    file_path = abspath(file_path)
+    inside_root_path = file_path.startswith(context.config.FILE_LOADER_ROOT_PATH)
+
+    result = LoaderResult()
+
+    if inside_root_path and exists(file_path):
+
+        # If this is a video, extract a frame and load it instead
+        if is_video(file_path):
+            file_path = get_video_frame(context, file_path)
+
+        with open(file_path, 'r') as f:
+            stats = fstat(f.fileno())
+
+            result.successful = True
+            result.buffer = f.read()
+
+            result.metadata.update(
+                size=stats.st_size,
+                updated_at=datetime.utcfromtimestamp(stats.st_mtime)
+            )
+    else:
+        result.error = LoaderResult.ERROR_NOT_FOUND
+        result.successful = False
+
+    callback(result)
+
+
+def is_video(file_path):
+    """
+    Checks whether the file is a video.
+    """
+    import mimetypes
+    type = mimetypes.guess_type(file_path)[0]
+    return type and type.startswith('video')
+
+
+def get_video_frame(context, file_path):
+    """
+    Extracts a single frame out of a video file and stores it
+    in a temporary file. Returns the path of the temporary file.
+    Depends on FFMPEG_PATH from Thumbor's configuration.
+    """
+    import subprocess, tempfile, os
+    f, image_path = tempfile.mkstemp('.jpg')
+    os.close(f)
+    cmd = [
+        context.config.FFMPEG_PATH,
+        '-i', file_path,
+        '-ss', '00:00:01.000',
+        '-vframes', '1',
+        '-y', 
+        '-nostats', 
+        '-loglevel', 'error',
+        image_path
+    ]
+    subprocess.call(cmd)
+    print image_path
+    return image_path

tests/loaders/test_file_loader.py

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+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# thumbor imaging service
+# https://github.com/thumbor/thumbor/wiki
+
+# Licensed under the MIT license:
+# http://www.opensource.org/licenses/mit-license
+# Copyright (c) 2011 globo.com [email protected]
+
+from os.path import abspath, join, dirname
+
+from unittest import TestCase
+from preggy import expect
+import imghdr
+
+from thumbor.context import Context
+from thumbor.config import Config
+from tc_video.loaders.file_loader import load
+from thumbor.loaders import LoaderResult
+
+IMAGE_STORAGE_PATH = abspath(join(dirname(__file__), '../fixtures/images/'))
+VIDEO_STORAGE_PATH = abspath(join(dirname(__file__), '../fixtures/videos/'))
+
+
+class FileLoaderImageTestCase(TestCase):
+    def setUp(self):
+        config = Config(
+            FILE_LOADER_ROOT_PATH=IMAGE_STORAGE_PATH
+        )
+        self.ctx = Context(config=config)
+
+    def load_file(self, file_name):
+        return load(self.ctx, file_name, lambda x: x).result()
+
+    def test_should_load_file(self):
+        result = self.load_file('image.jpg')
+        expect(result).to_be_instance_of(LoaderResult)
+        expect(result.buffer).to_equal(open(join(IMAGE_STORAGE_PATH, 'image.jpg')).read())
+        expect(result.successful).to_be_true()
+
+    def test_should_fail_when_inexistent_file(self):
+        result = self.load_file('image_NOT.jpg')
+        expect(result).to_be_instance_of(LoaderResult)
+        expect(result.buffer).to_equal(None)
+        expect(result.successful).to_be_false()
+
+    def test_should_fail_when_outside_root_path(self):
+        result = self.load_file('../__init__.py')
+        expect(result).to_be_instance_of(LoaderResult)
+        expect(result.buffer).to_equal(None)
+        expect(result.successful).to_be_false()
+
+
+class FileLoaderVideoTestCase(TestCase):
+    def setUp(self):
+        config = Config(
+            FILE_LOADER_ROOT_PATH=VIDEO_STORAGE_PATH,
+            FFMPEG_PATH = '/usr/bin/ffmpeg'
+        )
+        self.ctx = Context(config=config)
+
+    def load_file(self, file_name):
+        return load(self.ctx, file_name, lambda x: x).result()
+
+    def test_should_load_jpeg(self):
+        for ext in ('mp4', 'flv', '3gp', 'ogv', 'webm'):
+            result = self.load_file('small.' + ext)
+            expect(result).to_be_instance_of(LoaderResult)
+            expect(result.buffer[:2]).to_equal('\xFF\xD8') # look for jpeg header
+            expect(result.successful).to_be_true()
+
+    def test_should_fail_when_inexistent_file(self):
+        result = self.load_file('not_there.mp4')
+        expect(result).to_be_instance_of(LoaderResult)
+        expect(result.buffer).to_equal(None)
+        expect(result.successful).to_be_false()
+
+    def test_should_fail_when_outside_root_path(self):
+        result = self.load_file('../__init__.py')
+        expect(result).to_be_instance_of(LoaderResult)
+        expect(result.buffer).to_equal(None)
+        expect(result.successful).to_be_false()
+