Started testing pluggable views

#!/usr/bin/env python

from pprint import pprint

from importlib import import_module

import time

import datetime

from flask import (

    Flask, render_template, Response,

    redirect, request, jsonify, send_file)

import numpy as np

from openflexure_microscope.camera.pi import StreamingCamera

app = Flask(__name__)

cam = StreamingCamera()

def parse_payload(request):

    """Convert request to JSON. Will eventually handle error-checking."""

    # TODO: Handle invalid JSON payloads

    state = request.get_json()

    return state

def gen(camera):

    """Video streaming generator function."""

    while True:

        # the obtained frame is a jpeg

        frame = camera.get_frame()

        yield (b'--frame\r\n'

               b'Content-Type: image/jpeg\r\n\r\n' + frame + b'\r\n')

@app.route('/')

def index():

    """Video streaming home page."""

    cam.start_worker()  # Start the stream

    return render_template('index.html')

@app.route('/stream')

def stream():

    """Video streaming route. Put this in the src attribute of an img tag."""

    return Response(

        gen(cam),

        mimetype='multipart/x-mixed-replace; boundary=frame')

# TODO: Be able to change the image resolution with an option

@app.route('/capture/', methods=['GET', 'POST', 'PUT'])

def capture():

    """

    POST/PUT: Capture a single image.

    GET: Return capture status, or download latest capture.

    """

    if request.method == 'POST' or request.method == 'PUT':

        state = parse_payload(request)

        print(state)

        # Handle filename argument

        if 'filename' in state:

            filename = state['filename']

        else:

            filename = None

        if 'write_to_file' in state:

            write_to_file = bool(state['write_to_file'])

        else:

            write_to_file = False

        if 'use_video_port' in state:

            use_video_port = bool(state['use_video_port'])

        else:

            use_video_port = False

        if 'resize' in state:

            resize_h = int(state['resize'])

            resize_w = int(resize_h*(4/3))

            resize = (resize_w, resize_h)

        else:

            resize = None

        response = cam.capture(

            write_to_file=write_to_file,

            use_video_port=use_video_port,

            filename=filename,

            resize=resize)

        return str(response) + "\n"

    else:  # If GET request

        download = request.args.get('download')

        state = cam.state

        if ((

                download == 'true' or

                download == 'True' or

                download == '1') and

                cam.image is not None):

            return send_file(cam.image.data, mimetype='image/jpeg')

        else:

            return jsonify(state)

@app.route('/record/', methods=['GET', 'POST', 'PUT'])

def record():

    """

    POST/PUT: Start or stop a video recording.

    GET: Return recording status, or download latest recording

    """

    if request.method == 'POST' or request.method == 'PUT':

        state = request.get_json()

        print(state)

        # Handle filename argument

        if 'filename' in state:

            filename = state['filename']

        else:

            filename = None

        # Handle status argument

        if 'status' in state:

            status = bool(state['status'])

        # synchronise the arduino_time

        if status is True:

            response = cam.start_recording(filename=filename)

            return str(response)

        elif status is False:

            response = cam.stop_recording()

            return str(response)

    else:

        download = request.args.get('download')

        state = cam.state

        if ((

                download == 'true' or

                download == 'True' or

                download == '1') and

                cam.state['recent_video'] is not None):

            return send_file(

                cam.state['recent_video'],

                mimetype='video/H264',

                as_attachment=True)

        else:

            return jsonify(state)

@app.route('/preview/', methods=['GET', 'POST', 'PUT'])

def preview():

    """

    POST/PUT: Start or stop the direct-to-GPU camera preview on the Pi.

    GET: Return preview status

    """

    if request.method == 'POST' or request.method == 'PUT':

        state = request.get_json()

        print(state)

        if 'status' in state:

            status = bool(state['status'])

        if status is False:

            response = cam.stop_preview()

        else:

            response = cam.start_preview()

        return str(response)

    else:

        # Get args passed via URL (not useful here. Just for reference.)

        state = cam.state

        return jsonify(state)

if __name__ == '__main__':

    app.run(host='0.0.0.0', threaded=True, debug=True, use_reloader=False)

# Minimal makefile for Sphinx documentation

#

# You can set these variables from the command line.

SPHINXOPTS    =

SPHINXBUILD   = sphinx-build

SPHINXPROJ    = openflexure_microscope_api

SOURCEDIR     = source

BUILDDIR      = build

# Put it first so that "make" without argument is like "make help".

help:

	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

.PHONY: help Makefile

# Catch-all target: route all unknown targets to Sphinx using the new

# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).

%: Makefile

	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

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@ECHO OFF

pushd %~dp0

REM Command file for Sphinx documentation

if "%SPHINXBUILD%" == "" (

	set SPHINXBUILD=sphinx-build

)

set SOURCEDIR=source

set BUILDDIR=build

set SPHINXPROJ=openflexure_microscope_api

if "%1" == "" goto help

%SPHINXBUILD% >NUL 2>NUL

if errorlevel 9009 (

	echo.

	echo.The 'sphinx-build' command was not found. Make sure you have Sphinx

	echo.installed, then set the SPHINXBUILD environment variable to point

	echo.to the full path of the 'sphinx-build' executable. Alternatively you

	echo.may add the Sphinx directory to PATH.

	echo.

	echo.If you don't have Sphinx installed, grab it from

	echo.http://sphinx-doc.org/

	exit /b 1

)

%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS%

goto end

:help

%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS%

:end

popd

Sphinx

sphinxcontrib-httpdomain

sphinx_rtd_theme

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# -*- coding: utf-8 -*-

#

# Configuration file for the Sphinx documentation builder.

#

# This file does only contain a selection of the most common options. For a

# full list see the documentation:

# http://www.sphinx-doc.org/en/master/config

# -- Path setup --------------------------------------------------------------

# If extensions (or modules to document with autodoc) are in another directory,

# add these directories to sys.path here. If the directory is relative to the

# documentation root, use os.path.abspath to make it absolute, like shown here.

#

# import os

# import sys

# sys.path.insert(0, os.path.abspath('.'))

# -- Project information -----------------------------------------------------

project = 'openflexure_microscope_api'

copyright = '2018, Joel Collins'

author = 'Joel Collins'

# The short X.Y version

version = ''

# The full version, including alpha/beta/rc tags

release = '0.0.1'

# -- General configuration ---------------------------------------------------

# If your documentation needs a minimal Sphinx version, state it here.

#

# needs_sphinx = '1.0'

# Add any Sphinx extension module names here, as strings. They can be

# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom

# ones.

extensions = [

    'sphinx.ext.autodoc',

    'sphinx.ext.intersphinx',

    'sphinx.ext.ifconfig',

    'sphinxcontrib.httpdomain',

    'sphinxcontrib.autohttp.flask',

    'sphinxcontrib.autohttp.flaskqref',

]

# Override ordering

autodoc_member_order = 'bysource'

# Add any paths that contain templates here, relative to this directory.

templates_path = ['_templates']

# The suffix(es) of source filenames.

# You can specify multiple suffix as a list of string:

#

# source_suffix = ['.rst', '.md']

source_suffix = '.rst'

# The master toctree document.

master_doc = 'index'

# The language for content autogenerated by Sphinx. Refer to documentation

# for a list of supported languages.

#

# This is also used if you do content translation via gettext catalogs.

# Usually you set "language" from the command line for these cases.

language = None

# List of patterns, relative to source directory, that match files and

# directories to ignore when looking for source files.

# This pattern also affects html_static_path and html_extra_path .

exclude_patterns = []

# The name of the Pygments (syntax highlighting) style to use.

pygments_style = 'sphinx'

# -- Options for HTML output -------------------------------------------------

# The theme to use for HTML and HTML Help pages.  See the documentation for

# a list of builtin themes.

#

html_theme = "sphinx_rtd_theme"

# Theme options are theme-specific and customize the look and feel of a theme

# further.  For a list of options available for each theme, see the

# documentation.

#

# html_theme_options = {}

# Add any paths that contain custom static files (such as style sheets) here,

# relative to this directory. They are copied after the builtin static files,

# so a file named "default.css" will overwrite the builtin "default.css".

html_static_path = ['_static']

# Custom sidebar templates, must be a dictionary that maps document names

# to template names.

#

# The default sidebars (for documents that don't match any pattern) are

# defined by theme itself.  Builtin themes are using these templates by

# default: ``['localtoc.html', 'relations.html', 'sourcelink.html',

# 'searchbox.html']``.

#

# html_sidebars = {}

# -- Options for HTMLHelp output ---------------------------------------------

# Output file base name for HTML help builder.

htmlhelp_basename = 'openflexure_microscope_apidoc'

# -- Options for LaTeX output ------------------------------------------------

latex_elements = {

    # The paper size ('letterpaper' or 'a4paper').

    #

    # 'papersize': 'letterpaper',

    # The font size ('10pt', '11pt' or '12pt').

    #

    # 'pointsize': '10pt',

    # Additional stuff for the LaTeX preamble.

    #

    # 'preamble': '',

    # Latex figure (float) alignment

    #

    # 'figure_align': 'htbp',

}

# Grouping the document tree into LaTeX files. List of tuples

# (source start file, target name, title,

#  author, documentclass [howto, manual, or own class]).

latex_documents = [

    (master_doc, 'openflexure_microscope_api.tex', 'openflexure\\_microscope\\_api Documentation',

     'Joel Collins', 'manual'),

]

# -- Options for manual page output ------------------------------------------

# One entry per manual page. List of tuples

# (source start file, name, description, authors, manual section).

man_pages = [

    (master_doc, 'openflexure_microscope_api', 'openflexure_microscope_api Documentation',

     [author], 1)

]

# -- Options for Texinfo output ----------------------------------------------

# Grouping the document tree into Texinfo files. List of tuples

# (source start file, target name, title, author,

#  dir menu entry, description, category)

texinfo_documents = [

    (master_doc, 'openflexure_microscope_api', 'openflexure_microscope_api Documentation',

     author, 'openflexure_microscope_api', 'One line description of project.',

     'Miscellaneous'),

]

# -- Extension configuration -------------------------------------------------

# -- Options for intersphinx extension ---------------------------------------

# Example configuration for intersphinx: refer to the Python standard library.

intersphinx_mapping = {'https://docs.python.org/': None}

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