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617 lines
22 KiB
Python
617 lines
22 KiB
Python
2 years ago
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################################################################################
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# Copyright (C) 2013-2014 gempa GmbH
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#
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# RequestOptions -- HTTP GET request parameters
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#
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# Author: Stephan Herrnkind
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# Email: herrnkind@gempa.de
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################################################################################
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from __future__ import absolute_import, division, print_function
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import fnmatch
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import math
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import re
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from twisted.web import http
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from seiscomp.core import Time
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import seiscomp.logging
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import seiscomp.math
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from .utils import py3ustr, py3ustrlist
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class RequestOptions:
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# the match() method matched only patterns at the beginning of a string,
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# since we have to ensure that no invalid character is present we use the
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# search() method in combination with a negated pattern instead
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FloatChars = re.compile(r'[^-0-9.]').search
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ChannelChars = re.compile(r'[^A-Za-z0-9*?]').search
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ChannelExtChars = re.compile(r'[^A-Za-z0-9*?+\-_]').search
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TimeFormats = ['%FT%T.%f', # YYYY-MM-DDThh:mm:ss.ssssss
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'%Y-%jT%T.%f', # YYYY-DDDThh:mm:ss.ssssss
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'%FT%T', # YYYY-MM-DDThh:mm:ss
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'%Y-%jT%T', # YYYY-DDDThh:mm:ss
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'%FT%R', # YYYY-MM-DDThh:mm
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'%Y-%jT%R', # YYYY-DDDThh:mm
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'%FT%H', # YYYY-MM-DDThh
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'%Y-%jT%H', # YYYY-DDDThh
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'%F', # YYYY-MM-DD
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'%Y-%j', # YYYY-DDD
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'%Y', # YYYY
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]
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BooleanTrueValues = ['1', 'true', 't', 'yes', 'y']
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BooleanFalseValues = ['0', 'false', 'f', 'no', 'n']
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OutputFormats = [] # override in derived classes
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PStart = ['starttime', 'start']
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PEnd = ['endtime', 'end']
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PStartBefore = ['startbefore']
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PStartAfter = ['startafter']
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PEndBefore = ['endbefore']
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PEndAfter = ['endafter']
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SimpleTimeParams = PStart + PEnd
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WindowTimeParams = PStartBefore + PStartAfter + PEndBefore + PEndAfter
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TimeParams = SimpleTimeParams + WindowTimeParams
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PNet = ['network', 'net']
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PSta = ['station', 'sta']
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PLoc = ['location', 'loc']
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PCha = ['channel', 'cha']
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StreamParams = PNet + PSta + PLoc + PCha
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PMinLat = ['minlatitude', 'minlat']
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PMaxLat = ['maxlatitude', 'maxlat']
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PMinLon = ['minlongitude', 'minlon']
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PMaxLon = ['maxlongitude', 'maxlon']
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PLat = ['latitude', 'lat']
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PLon = ['longitude', 'lon']
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PMinRadius = ['minradius']
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PMaxRadius = ['maxradius']
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GeoRectParams = PMinLat + PMaxLat + PMinLon + PMaxLon
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GeoCircleParams = PLat + PLon + PMinRadius + PMaxRadius
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GeoParams = GeoRectParams + GeoCircleParams
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PFormat = ['format']
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PNoData = ['nodata']
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OutputParams = PFormat + PNoData
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POSTParams = OutputParams
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GETParams = StreamParams + SimpleTimeParams
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#---------------------------------------------------------------------------
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class Channel:
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def __init__(self):
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self.net = None
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self.sta = None
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self.loc = None
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self.cha = None
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def matchNet(self, value):
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return self.match(value, self.net)
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def matchSta(self, value):
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return self.match(value, self.sta)
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def matchLoc(self, value):
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return self.match(value, self.loc, True)
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def matchCha(self, value):
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return self.match(value, self.cha)
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@staticmethod
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def match(value, globList, testEmpty=False):
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if not globList:
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return True
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for glob in globList:
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if testEmpty and value == '' and glob == '--':
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return True
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if fnmatch.fnmatchcase(value, glob):
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return True
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return False
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#---------------------------------------------------------------------------
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class Time:
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def __init__(self):
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self.simpleTime = True
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self.start = None
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self.end = None
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# window time only
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self.startBefore = None
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self.startAfter = None
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self.endBefore = None
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self.endAfter = None
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# used by FDSN Station and DataSelect
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def match(self, start, end=None):
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# simple time: limit to epochs intersecting with the specified time
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# range
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res = (self.start is None or end is None or end >= self.start) and \
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(self.end is None or start <= self.end)
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# window time: limit to epochs strictly starting or ending before or
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# after a specified time value
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if not self.simpleTime:
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res = res and \
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(self.startBefore is None or (
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start is not None and start < self.startBefore)) and \
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(self.startAfter is None or (
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start is not None and start > self.startAfter)) and \
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(self.endBefore is None or (
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end is not None and end < self.endBefore)) and \
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(self.endAfter is None or end is None or end > self.endAfter)
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return res
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#---------------------------------------------------------------------------
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class Geo:
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#-----------------------------------------------------------------------
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class BBox:
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def __init__(self):
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self.minLat = None
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self.maxLat = None
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self.minLon = None
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self.maxLon = None
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def dateLineCrossing(self):
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return self.minLon and self.maxLon and self.minLon > self.maxLon
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#-----------------------------------------------------------------------
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class BCircle:
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def __init__(self):
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self.lat = None
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self.lon = None
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self.minRad = None
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self.maxRad = None
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#-------------------------------------------------------------------
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# Calculates outer bounding box
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def calculateBBox(self):
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def rad(degree):
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return math.radians(degree)
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def deg(radians):
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return math.degrees(radians)
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b = RequestOptions.Geo.BBox()
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if self.maxRad is None or self.maxRad >= 180:
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return b
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b.minLat = self.lat - self.maxRad
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b.maxLat = self.lat + self.maxRad
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if b.minLat > -90 and b.maxLat < 90:
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dLon = deg(math.asin(math.sin(rad(self.maxRad) /
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math.cos(rad(self.lat)))))
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b.minLon = self.lon - dLon
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if b.minLon < -180:
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b.minLon += 360
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b.maxLon = self.lon + dLon
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if b.maxLon > 180:
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b.maxLon -= 360
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else:
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# pole within distance: one latitude and no longitude
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# restrictions remains
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if b.minLat <= -90:
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b.minLat = None
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else:
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b.maxLat = None
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b.minLon = None
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b.maxLon = None
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return b
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#-----------------------------------------------------------------------
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def __init__(self):
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self.bBox = None
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self.bCircle = None
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#-----------------------------------------------------------------------
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def match(self, lat, lon):
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if self.bBox is not None:
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b = self.bBox
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if b.minLat is not None and lat < b.minLat:
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return False
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if b.maxLat is not None and lat > b.maxLat:
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return False
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# date line crossing if minLon > maxLon
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if b.dateLineCrossing():
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return lon >= b.minLon or lon <= b.maxLon
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if b.minLon is not None and lon < b.minLon:
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return False
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if b.maxLon is not None and lon > b.maxLon:
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return False
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return True
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if self.bCircle:
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c = self.bCircle
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dist = seiscomp.math.delazi(c.lat, c.lon, lat, lon)
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if c.minRad is not None and dist[0] < c.minRad:
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return False
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if c.maxRad is not None and dist[0] > c.maxRad:
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return False
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return True
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return False
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#---------------------------------------------------------------------------
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def __init__(self):
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self.service = ""
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self.accessTime = Time.GMT()
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self.userName = None
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self.time = None
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self.channel = None
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self.geo = None
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self.noData = http.NO_CONTENT
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self.format = None
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self._args = {}
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self.streams = [] # 1 entry for GET, multipl
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#---------------------------------------------------------------------------
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def parseOutput(self):
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# nodata
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code = self.parseInt(self.PNoData)
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if code is not None:
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if code not in (http.NO_CONTENT, http.NOT_FOUND):
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self.raiseValueError(self.PNoData[0])
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self.noData = code
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# format
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key, value = self.getFirstValue(self.PFormat)
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if value is None:
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# no format specified: default to first in list if available
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if len(self.OutputFormats) > 0:
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self.format = self.OutputFormats[0]
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else:
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value = value.lower()
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if value in self.OutputFormats:
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self.format = value
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else:
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self.raiseValueError(key)
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#---------------------------------------------------------------------------
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def parseChannel(self):
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c = RequestOptions.Channel()
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c.net = self.parseChannelChars(self.PNet, False, True)
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c.sta = self.parseChannelChars(self.PSta)
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c.loc = self.parseChannelChars(self.PLoc, True)
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c.cha = self.parseChannelChars(self.PCha)
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if c.net or c.sta or c.loc or c.cha:
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self.channel = c
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#---------------------------------------------------------------------------
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def parseTime(self, parseWindowTime=False):
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t = RequestOptions.Time()
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# start[time], end[time]
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t.start = self.parseTimeStr(self.PStart)
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t.end = self.parseTimeStr(self.PEnd)
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simpleTime = t.start is not None or t.end is not None
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# [start,end][before,after]
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if parseWindowTime:
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t.startBefore = self.parseTimeStr(self.PStartBefore)
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t.startAfter = self.parseTimeStr(self.PStartAfter)
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t.endBefore = self.parseTimeStr(self.PEndBefore)
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t.endAfter = self.parseTimeStr(self.PEndAfter)
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windowTime = t.startBefore is not None or t.startAfter is not None or \
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t.endBefore is not None or t.endAfter is not None
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if simpleTime or windowTime:
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self.time = t
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self.time.simpleTime = not windowTime
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elif simpleTime:
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self.time = t
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self.time.simpleTime = True
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#---------------------------------------------------------------------------
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def parseGeo(self):
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# bounding box (optional)
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b = RequestOptions.Geo.BBox()
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b.minLat = self.parseFloat(self.PMinLat, -90, 90)
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b.maxLat = self.parseFloat(self.PMaxLat, -90, 90)
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if b.minLat is not None and b.maxLat is not None and \
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b.minLat > b.maxLat:
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raise ValueError("%s exceeds %s" % (self.PMinLat[0],
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self.PMaxLat[0]))
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b.minLon = self.parseFloat(self.PMinLon, -180, 180)
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b.maxLon = self.parseFloat(self.PMaxLon, -180, 180)
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# maxLon < minLon -> date line crossing
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hasBBoxParam = b.minLat is not None or b.maxLat is not None or \
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b.minLon is not None or b.maxLon is not None
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# bounding circle (optional)
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c = RequestOptions.Geo.BCircle()
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c.lat = self.parseFloat(self.PLat, -90, 90)
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c.lon = self.parseFloat(self.PLon, -180, 180)
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c.minRad = self.parseFloat(self.PMinRadius, 0, 180)
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c.maxRad = self.parseFloat(self.PMaxRadius, 0, 180)
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if c.minRad is not None and c.maxRad is not None and \
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c.minRad > c.maxRad:
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raise ValueError("%s exceeds %s" % (self.PMinRadius[0],
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self.PMaxRadius[0]))
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hasBCircleRadParam = c.minRad is not None or c.maxRad is not None
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hasBCircleParam = c.lat is not None or c.lon is not None or \
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hasBCircleRadParam
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# bounding box and bounding circle may not be combined
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if hasBBoxParam and hasBCircleParam:
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raise ValueError("bounding box and bounding circle parameters " \
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"may not be combined")
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if hasBBoxParam:
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self.geo = RequestOptions.Geo()
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self.geo.bBox = b
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elif hasBCircleRadParam:
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self.geo = RequestOptions.Geo()
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if c.lat is None:
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c.lat = .0
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if c.lon is None:
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c.lon = .0
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self.geo.bCircle = c
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#---------------------------------------------------------------------------
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@staticmethod
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def _assertValueRange(key, v, minValue, maxValue):
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if (minValue is not None and v < minValue) or \
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(maxValue is not None and v > maxValue):
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minStr, maxStr = '-inf', 'inf'
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|
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if minValue is not None:
|
||
|
|
minStr = str(minValue)
|
||
|
|
if maxValue is not None:
|
||
|
|
maxStr = str(maxValue)
|
||
|
|
raise ValueError(
|
||
|
|
"parameter not in domain [%s,%s]: %s" % (minStr, maxStr, key))
|
||
|
|
|
||
|
|
#---------------------------------------------------------------------------
|
||
|
|
@staticmethod
|
||
|
|
def raiseValueError(key):
|
||
|
|
raise ValueError("invalid value in parameter: %s" % key)
|
||
|
|
|
||
|
|
#---------------------------------------------------------------------------
|
||
|
|
def getFirstValue(self, keys):
|
||
|
|
for key in keys:
|
||
|
|
if key in self._args:
|
||
|
|
return key, self._args[key][0].strip()
|
||
|
|
|
||
|
|
return None, None
|
||
|
|
|
||
|
|
#---------------------------------------------------------------------------
|
||
|
|
def getValues(self, keys):
|
||
|
|
v = []
|
||
|
|
for key in keys:
|
||
|
|
if key in self._args:
|
||
|
|
v += self._args[key]
|
||
|
|
return v
|
||
|
|
|
||
|
|
#---------------------------------------------------------------------------
|
||
|
|
def getListValues(self, keys, lower=False):
|
||
|
|
values = set()
|
||
|
|
for key in keys:
|
||
|
|
if not key in self._args:
|
||
|
|
continue
|
||
|
|
for vList in self._args[key]:
|
||
|
|
for v in vList.split(','):
|
||
|
|
if v is None:
|
||
|
|
continue
|
||
|
|
v = v.strip()
|
||
|
|
if lower:
|
||
|
|
v = v.lower()
|
||
|
|
values.add(v)
|
||
|
|
|
||
|
|
return values
|
||
|
|
|
||
|
|
#---------------------------------------------------------------------------
|
||
|
|
def parseInt(self, keys, minValue=None, maxValue=None):
|
||
|
|
key, value = self.getFirstValue(keys)
|
||
|
|
|
||
|
|
if value is None:
|
||
|
|
return None
|
||
|
|
|
||
|
|
try:
|
||
|
|
i = int(value)
|
||
|
|
except ValueError:
|
||
|
|
raise ValueError("invalid integer value in parameter: %s" % key)
|
||
|
|
self._assertValueRange(key, i, minValue, maxValue)
|
||
|
|
return i
|
||
|
|
|
||
|
|
#---------------------------------------------------------------------------
|
||
|
|
def parseFloat(self, keys, minValue=None, maxValue=None):
|
||
|
|
key, value = self.getFirstValue(keys)
|
||
|
|
|
||
|
|
if value is None:
|
||
|
|
return None
|
||
|
|
|
||
|
|
if self.FloatChars(value):
|
||
|
|
raise ValueError("invalid characters in float parameter: %s " \
|
||
|
|
"(scientific notation forbidden by spec)" % key)
|
||
|
|
|
||
|
|
try:
|
||
|
|
f = float(value)
|
||
|
|
except ValueError:
|
||
|
|
raise ValueError("invalid float value in parameter: %s" % key)
|
||
|
|
self._assertValueRange(key, f, minValue, maxValue)
|
||
|
|
return f
|
||
|
|
|
||
|
|
#---------------------------------------------------------------------------
|
||
|
|
def parseBool(self, keys):
|
||
|
|
key, value = self.getFirstValue(keys)
|
||
|
|
|
||
|
|
if value is None:
|
||
|
|
return None
|
||
|
|
|
||
|
|
value = value.lower()
|
||
|
|
if value in self.BooleanTrueValues:
|
||
|
|
return True
|
||
|
|
if value in self.BooleanFalseValues:
|
||
|
|
return False
|
||
|
|
|
||
|
|
raise ValueError("invalid boolean value in parameter: %s" % key)
|
||
|
|
|
||
|
|
#---------------------------------------------------------------------------
|
||
|
|
def parseTimeStr(self, keys):
|
||
|
|
key, value = self.getFirstValue(keys)
|
||
|
|
|
||
|
|
if value is None:
|
||
|
|
return None
|
||
|
|
|
||
|
|
time = Time()
|
||
|
|
timeValid = False
|
||
|
|
for fmt in RequestOptions.TimeFormats:
|
||
|
|
if time.fromString(value, fmt):
|
||
|
|
timeValid = True
|
||
|
|
break
|
||
|
|
|
||
|
|
if not timeValid:
|
||
|
|
raise ValueError("invalid date format in parameter: %s" % key)
|
||
|
|
|
||
|
|
return time
|
||
|
|
|
||
|
|
#---------------------------------------------------------------------------
|
||
|
|
def parseChannelChars(self, keys, allowEmpty=False, useExtChars=False):
|
||
|
|
# channel parameters may be specified as a comma separated list and may
|
||
|
|
# be repeated several times
|
||
|
|
values = None
|
||
|
|
for vList in self.getValues(keys):
|
||
|
|
if values is None:
|
||
|
|
values = []
|
||
|
|
for v in vList.split(','):
|
||
|
|
v = v.strip()
|
||
|
|
if allowEmpty and (v == '--' or len(v) == 0):
|
||
|
|
values.append('--')
|
||
|
|
continue
|
||
|
|
|
||
|
|
if (useExtChars and self.ChannelExtChars(v)) or \
|
||
|
|
(not useExtChars and self.ChannelChars(v)):
|
||
|
|
raise ValueError("invalid characters in parameter: " \
|
||
|
|
"%s" % keys[0])
|
||
|
|
values.append(v)
|
||
|
|
|
||
|
|
return values
|
||
|
|
|
||
|
|
#---------------------------------------------------------------------------
|
||
|
|
def parseGET(self, args):
|
||
|
|
# transform keys to lower case
|
||
|
|
if args is not None:
|
||
|
|
for k, v in args.items():
|
||
|
|
k = py3ustr(k.lower())
|
||
|
|
if k not in self.GETParams:
|
||
|
|
raise ValueError("invalid param: %s" % k)
|
||
|
|
|
||
|
|
self._args[k] = py3ustrlist(v)
|
||
|
|
|
||
|
|
#---------------------------------------------------------------------------
|
||
|
|
def parsePOST(self, content):
|
||
|
|
nLine = 0
|
||
|
|
|
||
|
|
for line in content:
|
||
|
|
nLine += 1
|
||
|
|
line = py3ustr(line.strip())
|
||
|
|
|
||
|
|
# ignore empty and comment lines
|
||
|
|
if len(line) == 0 or line[0] == '#':
|
||
|
|
continue
|
||
|
|
|
||
|
|
# collect parameter (non stream lines)
|
||
|
|
toks = line.split("=", 1)
|
||
|
|
if len(toks) > 1:
|
||
|
|
key = toks[0].strip().lower()
|
||
|
|
|
||
|
|
isPOSTParam = False
|
||
|
|
for p in self.POSTParams:
|
||
|
|
if p == key:
|
||
|
|
if key not in self._args:
|
||
|
|
self._args[key] = []
|
||
|
|
self._args[key].append(toks[1].strip())
|
||
|
|
isPOSTParam = True
|
||
|
|
break
|
||
|
|
|
||
|
|
if isPOSTParam:
|
||
|
|
continue
|
||
|
|
|
||
|
|
# time parameters not allowed in POST header
|
||
|
|
for p in self.TimeParams:
|
||
|
|
if p == key:
|
||
|
|
raise ValueError("time parameter in line %i not " \
|
||
|
|
"allowed in POST request" % nLine)
|
||
|
|
|
||
|
|
# stream parameters not allowed in POST header
|
||
|
|
for p in self.StreamParams:
|
||
|
|
if p == key:
|
||
|
|
raise ValueError("stream parameter in line %i not " \
|
||
|
|
"allowed in POST request" % nLine)
|
||
|
|
|
||
|
|
raise ValueError("invalid parameter in line %i" % nLine)
|
||
|
|
|
||
|
|
|
||
|
|
# stream parameters
|
||
|
|
toks = line.split()
|
||
|
|
nToks = len(toks)
|
||
|
|
if nToks not in (5, 6):
|
||
|
|
raise ValueError("invalid number of stream components " \
|
||
|
|
"in line %i" % nLine)
|
||
|
|
|
||
|
|
ro = RequestOptions()
|
||
|
|
|
||
|
|
# net, sta, loc, cha
|
||
|
|
ro.channel = RequestOptions.Channel()
|
||
|
|
ro.channel.net = toks[0].split(',')
|
||
|
|
ro.channel.sta = toks[1].split(',')
|
||
|
|
ro.channel.loc = toks[2].split(',')
|
||
|
|
ro.channel.cha = toks[3].split(',')
|
||
|
|
|
||
|
|
msg = "invalid %s value in line %i"
|
||
|
|
for net in ro.channel.net:
|
||
|
|
if ro.ChannelChars(net):
|
||
|
|
raise ValueError(msg % ('network', nLine))
|
||
|
|
for sta in ro.channel.sta:
|
||
|
|
if ro.ChannelChars(sta):
|
||
|
|
raise ValueError(msg % ('station', nLine))
|
||
|
|
for loc in ro.channel.loc:
|
||
|
|
if loc != "--" and ro.ChannelChars(loc):
|
||
|
|
raise ValueError(msg % ('location', nLine))
|
||
|
|
for cha in ro.channel.cha:
|
||
|
|
if ro.ChannelChars(cha):
|
||
|
|
raise ValueError(msg % ('channel', nLine))
|
||
|
|
|
||
|
|
# start/end time
|
||
|
|
ro.time = RequestOptions.Time()
|
||
|
|
ro.time.start = Time()
|
||
|
|
for fmt in RequestOptions.TimeFormats:
|
||
|
|
if ro.time.start.fromString(toks[4], fmt):
|
||
|
|
break
|
||
|
|
logEnd = "-"
|
||
|
|
if len(toks) > 5:
|
||
|
|
ro.time.end = Time()
|
||
|
|
for fmt in RequestOptions.TimeFormats:
|
||
|
|
if ro.time.end.fromString(toks[5], fmt):
|
||
|
|
break
|
||
|
|
logEnd = ro.time.end.iso()
|
||
|
|
|
||
|
|
seiscomp.logging.debug("ro: %s.%s.%s.%s %s %s" % (
|
||
|
|
ro.channel.net, ro.channel.sta, ro.channel.loc,
|
||
|
|
ro.channel.cha, ro.time.start.iso(), logEnd))
|
||
|
|
self.streams.append(ro)
|
||
|
|
|
||
|
|
if len(self.streams) == 0:
|
||
|
|
raise ValueError("at least one stream line is required")
|
||
|
|
|
||
|
|
|
||
|
|
# vim: ts=4 et
|