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pi-daemon.py
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pi-daemon.py
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import web
import allsky
import glob
import datetime
import os
import sys
os.chdir(os.path.dirname(sys.argv[0]))
"""
Provide simple access to the AllSky camera throught a web interface.
n.b. create a director /static/images/ that links to the DOWNLOAD_DIR
"""
MAX_FILES = 150
DOWNLOAD_DIR = '/home/pi/fits/'
DEVICE = '/dev/tty.usbserial'
DEFAULT_EXPOSURE = 0.1
urls = ('/', 'SBIG',
'/view/(.*)', 'Viewer')
render = web.template.render('templates', base='base')
class Viewer:
def GET(self, name):
img_url = '/static/images/' + name
return render.fitsview(img_url)
class SBIG:
form = web.form.Form(
web.form.Textbox('exposure', web.form.notnull,
description='Exposure Time (s):',
value=DEFAULT_EXPOSURE),
web.form.Button('Take Image'),
)
def getImageList(self):
return map(os.path.basename, glob.glob(DOWNLOAD_DIR + '*.fits'))
def __init__(self):
self._camLock = False
def GET(self):
form = self.form()
return render.SBIG(form, self.getImageList())
def POST(self):
form = self.form()
if not form.validates() or self._camLock:
return render.SBIG(form, self.getImageList())
exposure = float(form.d.exposure)
assert(exposure > 0 and exposure < 653.3599)
self._camLock = True
cam = allsky.AllSkyCamera(DEVICE)
cam.open_shutter()
image = cam.get_image(exposure)
image.writeto(DOWNLOAD_DIR + str(datetime.datetime.now()) + '.fits')
self._camLock = False
return render.SBIG(form, self.getImageList())
app = web.application(urls, globals(), autoreload=False)
app.run()