1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
{-# LANGUAGE CPP #-}
-----------------------------------------------------------------------------
-- |
-- Module : Plugins.Monitors.Weather
-- Copyright : (c) Andrea Rossato
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Jose A. Ortega Ruiz <jao@gnu.org>
-- Stability : unstable
-- Portability : unportable
--
-- A weather monitor for Xmobar
--
-----------------------------------------------------------------------------
module Plugins.Monitors.Weather where
import Plugins.Monitors.Common
import qualified Control.Exception as CE
#ifdef HTTP_CONDUIT
import Network.HTTP.Conduit
import Network.HTTP.Types.Status
import Network.HTTP.Types.Method
import qualified Data.ByteString.Lazy.Char8 as B
#else
import Network.HTTP
#endif
import Text.ParserCombinators.Parsec
weatherConfig :: IO MConfig
weatherConfig = mkMConfig
"<station>: <tempC>C, rh <rh>% (<hour>)" -- template
["station" -- available replacements
, "stationState"
, "year"
, "month"
, "day"
, "hour"
, "windCardinal"
, "windAzimuth"
, "windMph"
, "windKnots"
, "windKmh"
, "windMs"
, "visibility"
, "skyCondition"
, "tempC"
, "tempF"
, "dewPointC"
, "dewPointF"
, "rh"
, "pressure"
]
data WindInfo =
WindInfo {
windCardinal :: String -- cardinal direction
, windAzimuth :: String -- azimuth direction
, windMph :: String -- speed (MPH)
, windKnots :: String -- speed (knot)
, windKmh :: String -- speed (km/h)
, windMs :: String -- speed (m/s)
} deriving (Show)
data WeatherInfo =
WI { stationPlace :: String
, stationState :: String
, year :: String
, month :: String
, day :: String
, hour :: String
, windInfo :: WindInfo
, visibility :: String
, skyCondition :: String
, tempC :: Int
, tempF :: Int
, dewPointC :: Int
, dewPointF :: Int
, humidity :: Int
, pressure :: Int
} deriving (Show)
pTime :: Parser (String, String, String, String)
pTime = do y <- getNumbersAsString
char '.'
m <- getNumbersAsString
char '.'
d <- getNumbersAsString
char ' '
(h:hh:mi:mimi) <- getNumbersAsString
char ' '
return (y, m, d ,h:hh:":"++mi:mimi)
noWind :: WindInfo
noWind = WindInfo "μ" "μ" "0" "0" "0" "0"
pWind :: Parser WindInfo
pWind =
let tospace = manyTill anyChar (char ' ')
toKmh knots = knots $* 1.852
toMs knots = knots $* 0.514
($*) :: String -> Double -> String
op1 $* op2 = show (round ((read op1::Double) * op2)::Integer)
-- Occasionally there is no wind and a METAR report gives simply, "Wind: Calm:0"
wind0 = do manyTill skipRestOfLine (string "Wind: Calm:0")
return noWind
windVar = do manyTill skipRestOfLine (string "Wind: Variable at ")
mph <- tospace
string "MPH ("
knot <- tospace
manyTill anyChar newline
return $ WindInfo "μ" "μ" mph knot (toKmh knot) (toMs knot)
wind = do manyTill skipRestOfLine (string "Wind: from the ")
cardinal <- tospace
char '('
azimuth <- tospace
string "degrees) at "
mph <- tospace
string "MPH ("
knot <- tospace
manyTill anyChar newline
return $ WindInfo cardinal azimuth mph knot (toKmh knot) (toMs knot)
in try wind0 <|> try windVar <|> try wind <|> return noWind
pTemp :: Parser (Int, Int)
pTemp = do let num = digit <|> char '-' <|> char '.'
f <- manyTill num $ char ' '
manyTill anyChar $ char '('
c <- manyTill num $ char ' '
skipRestOfLine
return (floor (read c :: Double), floor (read f :: Double))
pRh :: Parser Int
pRh = do s <- manyTill digit (char '%' <|> char '.')
return $ read s
pPressure :: Parser Int
pPressure = do manyTill anyChar $ char '('
s <- manyTill digit $ char ' '
skipRestOfLine
return $ read s
{-
example of 'http://weather.noaa.gov/pub/data/observations/metar/decoded/VTUD.TXT':
Station name not available
Aug 11, 2013 - 10:00 AM EDT / 2013.08.11 1400 UTC
Wind: from the N (350 degrees) at 1 MPH (1 KT):0
Visibility: 4 mile(s):0
Sky conditions: mostly clear
Temperature: 77 F (25 C)
Dew Point: 73 F (23 C)
Relative Humidity: 88%
Pressure (altimeter): 29.77 in. Hg (1008 hPa)
ob: VTUD 111400Z 35001KT 8000 FEW030 25/23 Q1008 A2977 INFO R RWY30
cycle: 14
-}
parseData :: Parser [WeatherInfo]
parseData =
do (st, ss) <- try (string "Station name not available" >> return ("??", "??")) <|>
(do st <- getAllBut ","
space
ss <- getAllBut "("
return (st, ss)
)
skipRestOfLine >> getAllBut "/"
(y,m,d,h) <- pTime
w <- pWind
v <- getAfterString "Visibility: "
sk <- getAfterString "Sky conditions: "
skipTillString "Temperature: "
(tC,tF) <- pTemp
skipTillString "Dew Point: "
(dC, dF) <- pTemp
skipTillString "Relative Humidity: "
rh <- pRh
skipTillString "Pressure (altimeter): "
p <- pPressure
manyTill skipRestOfLine eof
return [WI st ss y m d h w v sk tC tF dC dF rh p]
defUrl :: String
-- "http://weather.noaa.gov/pub/data/observations/metar/decoded/"
defUrl = "http://tgftp.nws.noaa.gov/data/observations/metar/decoded/"
stationUrl :: String -> String
stationUrl station = defUrl ++ station ++ ".TXT"
getData :: String -> IO String
#ifdef HTTP_CONDUIT
getData station = CE.catch (do
manager <- newManager tlsManagerSettings
request <- parseUrl $ stationUrl station
res <- httpLbs request manager
return $ B.unpack $ responseBody res
) errHandler
where errHandler :: CE.SomeException -> IO String
errHandler _ = return "<Could not retrieve data>"
#else
getData station = do
let request = getRequest (stationUrl station)
CE.catch (simpleHTTP request >>= getResponseBody) errHandler
where errHandler :: CE.IOException -> IO String
errHandler _ = return "<Could not retrieve data>"
#endif
formatWeather :: [WeatherInfo] -> Monitor String
formatWeather [WI st ss y m d h (WindInfo wc wa wm wk wkh wms) v sk tC tF dC dF r p] =
do cel <- showWithColors show tC
far <- showWithColors show tF
parseTemplate [st, ss, y, m, d, h, wc, wa, wm, wk, wkh, wms, v, sk, cel, far, show dC, show dF, show r , show p ]
formatWeather _ = getConfigValue naString
runWeather :: [String] -> Monitor String
runWeather str =
do d <- io $ getData $ head str
i <- io $ runP parseData d
formatWeather i
weatherReady :: [String] -> Monitor Bool
#ifdef HTTP_CONDUIT
weatherReady str = do
initRequest <- parseUrl $ stationUrl $ head str
let request = initRequest{method = methodHead}
io $ CE.catch ( do
manager <- newManager tlsManagerSettings
res <- httpLbs request manager
return $ checkResult $responseStatus res ) errHandler
where errHandler :: CE.SomeException -> IO Bool
errHandler _ = return False
checkResult status
| statusIsServerError status = False
| statusIsClientError status = False
| otherwise = True
#else
weatherReady str = do
let station = head str
request = headRequest (stationUrl station)
io $ CE.catch (simpleHTTP request >>= checkResult) errHandler
where errHandler :: CE.IOException -> IO Bool
errHandler _ = return False
checkResult result =
case result of
Left _ -> return False
Right response ->
case rspCode response of
-- Permission or network errors are failures; anything
-- else is recoverable.
(4, _, _) -> return False
(5, _, _) -> return False
(_, _, _) -> return True
#endif
|
