Artifact 018fb05fdad83d61e0cbbfbb53590934096186df36f5124f04932149695aa357:
- File
osrm.erl
— part of check-in
[6807958aad]
at
2014-12-17 22:46:39
on branch refs/stash
— Add basic implementation for selecting between route geometries
Not a great implementation, but it works. If no route geometry choice is
made it defaults to the default "route_geometry". If
"alternative_geometries" is specified it uses the first one of the
alternatives (because as far as I can tell there is only ever one
alternative? I supposed at some point I could extend if needed, perhaps
use a tuple argument: {"alternative_geomtries", 1}). (user: base@atomicules.co.uk size: 2923) [more...]
0000: 2d 6d 6f 64 75 6c 65 28 6f 73 72 6d 29 2e 0a 2d -module(osrm)..-
0010: 65 78 70 6f 72 74 28 5b 67 65 74 5f 72 6f 75 74 export([get_rout
0020: 65 2f 31 2c 20 67 65 74 5f 72 6f 75 74 65 2f 32 e/1, get_route/2
0030: 2c 20 72 65 61 64 5f 72 6f 75 74 65 2f 31 5d 29 , read_route/1])
0040: 2e 0a 2d 69 6d 70 6f 72 74 28 70 6f 6c 79 6c 69 ..-import(polyli
0050: 6e 65 2c 20 5b 64 65 63 6f 64 65 2f 31 5d 29 2e ne, [decode/1]).
0060: 0a 0a 25 68 74 74 70 73 3a 2f 2f 67 69 74 68 75 ..%https://githu
0070: 62 2e 63 6f 6d 2f 50 72 6f 6a 65 63 74 2d 4f 53 b.com/Project-OS
0080: 52 4d 2f 6f 73 72 6d 2d 62 61 63 6b 65 6e 64 2f RM/osrm-backend/
0090: 77 69 6b 69 2f 53 65 72 76 65 72 2d 61 70 69 0a wiki/Server-api.
00a0: 25 46 6f 72 20 6e 6f 77 2c 20 67 65 74 20 77 65 %For now, get we
00b0: 61 74 68 65 72 20 66 6f 72 20 6f 6e 65 20 6c 6f ather for one lo
00c0: 63 61 74 69 6f 6e 20 28 70 72 6f 62 61 62 6c 79 cation (probably
00d0: 20 67 6f 6f 64 20 65 6e 6f 75 67 68 20 61 73 20 good enough as
00e0: 72 65 6c 61 74 69 76 65 6c 79 20 73 68 6f 72 74 relatively short
00f0: 20 64 69 73 74 61 6e 63 65 73 20 77 65 61 74 68 distances weath
0100: 65 72 20 77 69 73 65 3b 20 75 6c 74 69 6d 61 74 er wise; ultimat
0110: 65 6c 79 20 63 6f 6e 73 69 64 65 72 20 74 69 6d ely consider tim
0120: 65 20 61 73 20 77 65 6c 6c 3f 29 0a 25 54 6f 20 e as well?).%To
0130: 67 65 74 20 6c 61 74 73 20 61 6e 64 20 6c 6f 6e get lats and lon
0140: 67 73 20 63 6f 75 6c 64 20 61 6c 73 6f 20 64 6f gs could also do
0150: 20 61 20 71 75 65 72 79 20 66 6f 72 20 68 65 72 a query for her
0160: 65 3a 20 68 74 74 70 3a 2f 2f 77 77 77 2e 75 6b e: http://www.uk
0170: 2d 70 6f 73 74 63 6f 64 65 73 2e 63 6f 6d 2f 20 -postcodes.com/
0180: 28 6a 73 6f 6e 20 61 67 61 69 6e 29 0a 0a 2d 64 (json again)..-d
0190: 65 66 69 6e 65 28 42 41 53 45 5f 55 52 4c 2c 0a efine(BASE_URL,.
01a0: 09 22 68 74 74 70 3a 2f 2f 72 6f 75 74 65 72 2e ."http://router.
01b0: 70 72 6f 6a 65 63 74 2d 6f 73 72 6d 2e 6f 72 67 project-osrm.org
01c0: 2f 22 29 2e 0a 0a 2d 64 65 66 69 6e 65 28 56 49 /")...-define(VI
01d0: 41 52 4f 55 54 45 2c 0a 09 22 76 69 61 72 6f 75 AROUTE,.."viarou
01e0: 74 65 22 29 2e 0a 0a 25 4e 65 65 64 20 68 69 6e te")...%Need hin
01f0: 74 73 20 61 6e 64 20 63 68 65 63 6b 73 75 6d 0a ts and checksum.
0200: 25 46 69 72 73 74 20 6f 6e 65 20 66 6f 72 20 63 %First one for c
0210: 6f 6d 6d 61 6e 64 20 6c 69 6e 65 20 75 73 61 67 ommand line usag
0220: 65 0a 25 25 54 68 65 73 65 20 77 69 6c 6c 20 62 e.%%These will b
0230: 65 20 73 74 72 69 6e 67 73 20 66 72 6f 6d 20 74 e strings from t
0240: 68 65 20 63 6f 6d 6d 61 6e 64 20 6c 69 6e 65 0a he command line.
0250: 67 65 74 5f 72 6f 75 74 65 28 5b 53 74 61 72 74 get_route([Start
0260: 5f 6c 61 74 2c 20 53 74 61 72 74 5f 6c 6f 6e 2c _lat, Start_lon,
0270: 20 46 69 6e 69 73 68 5f 6c 61 74 2c 20 46 69 6e Finish_lat, Fin
0280: 69 73 68 5f 6c 6f 6e 5d 29 20 2d 3e 0a 09 67 65 ish_lon]) ->..ge
0290: 74 5f 72 6f 75 74 65 28 5b 53 74 61 72 74 5f 6c t_route([Start_l
02a0: 61 74 2c 20 53 74 61 72 74 5f 6c 6f 6e 5d 2c 20 at, Start_lon],
02b0: 5b 46 69 6e 69 73 68 5f 6c 61 74 2c 20 46 69 6e [Finish_lat, Fin
02c0: 69 73 68 5f 6c 6f 6e 5d 29 2e 0a 67 65 74 5f 72 ish_lon])..get_r
02d0: 6f 75 74 65 28 5b 53 74 61 72 74 5f 6c 61 74 2c oute([Start_lat,
02e0: 20 53 74 61 72 74 5f 6c 6f 6e 5d 2c 20 5b 46 69 Start_lon], [Fi
02f0: 6e 69 73 68 5f 6c 61 74 2c 20 46 69 6e 69 73 68 nish_lat, Finish
0300: 5f 6c 6f 6e 5d 29 20 2d 3e 0a 09 69 6e 65 74 73 _lon]) ->..inets
0310: 3a 73 74 61 72 74 28 29 2c 0a 09 55 52 4c 20 3d :start(),..URL =
0320: 20 3f 42 41 53 45 5f 55 52 4c 20 2b 2b 20 3f 56 ?BASE_URL ++ ?V
0330: 49 41 52 4f 55 54 45 20 2b 2b 20 22 3f 6c 6f 63 IAROUTE ++ "?loc
0340: 3d 22 20 2b 2b 20 53 74 61 72 74 5f 6c 61 74 20 =" ++ Start_lat
0350: 2b 2b 20 22 2c 22 20 2b 2b 20 53 74 61 72 74 5f ++ "," ++ Start_
0360: 6c 6f 6e 20 2b 2b 20 22 26 6c 6f 63 3d 22 20 2b lon ++ "&loc=" +
0370: 2b 20 46 69 6e 69 73 68 5f 6c 61 74 20 2b 2b 20 + Finish_lat ++
0380: 22 2c 22 20 2b 2b 20 46 69 6e 69 73 68 5f 6c 6f "," ++ Finish_lo
0390: 6e 2c 0a 09 25 4e 65 65 64 20 55 41 20 74 6f 20 n,..%Need UA to
03a0: 77 6f 72 6b 20 77 69 74 68 20 4f 53 52 4d 20 41 work with OSRM A
03b0: 50 49 0a 09 55 41 20 3d 20 22 4d 6f 7a 69 6c 6c PI..UA = "Mozill
03c0: 61 2f 35 2e 30 20 28 58 31 31 3b 20 4e 65 74 42 a/5.0 (X11; NetB
03d0: 53 44 20 69 33 38 36 3b 20 72 76 3a 32 38 2e 30 SD i386; rv:28.0
03e0: 29 20 47 65 63 6b 6f 2f 32 30 31 30 30 31 30 31 ) Gecko/20100101
03f0: 20 46 69 72 65 66 6f 78 2f 32 38 2e 30 22 2c 0a Firefox/28.0",.
0400: 09 74 72 79 0a 09 09 25 48 61 6e 64 6c 69 6e 67 .try...%Handling
0410: 20 74 69 6d 65 6f 75 74 73 3a 20 68 74 74 70 3a timeouts: http:
0420: 2f 2f 73 74 61 63 6b 6f 76 65 72 66 6c 6f 77 2e //stackoverflow.
0430: 63 6f 6d 2f 61 2f 31 34 31 34 33 37 36 32 2f 32 com/a/14143762/2
0440: 30 38 37 39 33 0a 09 09 7b 20 6f 6b 2c 20 7b 5f 08793...{ ok, {_
0450: 53 74 61 74 75 73 2c 20 5f 48 65 61 64 65 72 73 Status, _Headers
0460: 2c 20 42 6f 64 79 20 7d 7d 20 3d 20 68 74 74 70 , Body }} = http
0470: 63 3a 72 65 71 75 65 73 74 28 67 65 74 2c 20 7b c:request(get, {
0480: 55 52 4c 2c 20 5b 7b 22 55 73 65 72 2d 41 67 65 URL, [{"User-Age
0490: 6e 74 22 2c 20 55 41 7d 5d 7d 2c 20 5b 7b 74 69 nt", UA}]}, [{ti
04a0: 6d 65 6f 75 74 2c 20 74 69 6d 65 72 3a 73 65 63 meout, timer:sec
04b0: 6f 6e 64 73 28 31 30 29 7d 5d 2c 20 5b 5d 29 2c onds(10)}], []),
04c0: 0a 09 09 25 46 6f 72 20 64 65 76 65 6c 6f 70 6d ...%For developm
04d0: 65 6e 74 20 70 75 72 70 6f 73 65 73 2c 20 77 72 ent purposes, wr
04e0: 69 74 65 20 74 68 69 73 20 6f 75 74 20 61 6e 64 ite this out and
04f0: 20 6b 65 65 70 20 69 74 0a 09 09 5f 57 72 69 74 keep it..._Writ
0500: 65 5f 73 74 61 74 75 73 20 3d 20 66 69 6c 65 3a e_status = file:
0510: 77 72 69 74 65 5f 66 69 6c 65 28 6f 73 3a 67 65 write_file(os:ge
0520: 74 65 6e 76 28 22 48 4f 4d 45 22 29 20 2b 2b 20 tenv("HOME") ++
0530: 22 2f 2e 68 65 61 64 73 69 6c 6f 73 65 5f 72 6f "/.headsilose_ro
0540: 75 74 65 22 2c 20 42 6f 64 79 29 2c 0a 09 09 25 ute", Body),...%
0550: 4e 65 65 64 20 74 6f 20 63 61 74 63 68 20 66 69 Need to catch fi
0560: 6c 65 20 77 72 69 74 65 20 65 72 72 6f 72 73 20 le write errors
0570: 61 73 20 77 65 6c 6c 0a 09 09 42 6f 64 79 0a 09 as well...Body..
0580: 63 61 74 63 68 0a 09 09 5f 3a 52 65 61 73 6f 6e catch..._:Reason
0590: 20 2d 3e 0a 09 09 09 69 6f 3a 66 6f 72 6d 61 74 ->....io:format
05a0: 28 22 41 50 49 20 4d 69 67 68 74 20 62 65 20 64 ("API Might be d
05b0: 6f 77 6e 7e 6e 22 29 2c 0a 09 09 09 52 65 61 73 own~n"),....Reas
05c0: 6f 6e 0a 09 61 66 74 65 72 0a 09 09 6d 61 79 62 on..after...mayb
05d0: 65 5f 71 75 69 74 28 29 0a 09 65 6e 64 2e 0a 0a e_quit()..end...
05e0: 0a 72 65 61 64 5f 72 6f 75 74 65 28 52 6f 75 74 .read_route(Rout
05f0: 65 5f 63 68 6f 69 63 65 29 20 2d 3e 0a 09 7b 5f e_choice) ->..{_
0600: 53 74 61 74 75 73 2c 20 52 6f 75 74 65 7d 20 3d Status, Route} =
0610: 20 66 69 6c 65 3a 72 65 61 64 5f 66 69 6c 65 28 file:read_file(
0620: 6f 73 3a 67 65 74 65 6e 76 28 22 48 4f 4d 45 22 os:getenv("HOME"
0630: 29 20 2b 2b 20 22 2f 2e 68 65 61 64 73 69 6c 6f ) ++ "/.headsilo
0640: 73 65 5f 72 6f 75 74 65 22 29 2c 0a 09 25 55 73 se_route"),..%Us
0650: 65 20 6a 69 66 66 79 0a 09 25 68 74 74 70 3a 2f e jiffy..%http:/
0660: 2f 77 77 77 2e 73 6e 69 70 32 63 6f 64 65 2e 63 /www.snip2code.c
0670: 6f 6d 2f 53 6e 69 70 70 65 74 2f 35 31 34 36 33 om/Snippet/51463
0680: 2f 68 6f 77 2d 74 6f 2d 73 75 70 70 6f 72 74 2d /how-to-support-
0690: 63 68 69 6e 65 73 65 2d 69 6e 2d 68 74 74 70 2d chinese-in-http-
06a0: 72 65 71 75 65 73 74 2d 62 2f 0a 09 7b 20 50 72 request-b/..{ Pr
06b0: 6f 70 73 20 7d 20 3d 20 6a 69 66 66 79 3a 64 65 ops } = jiffy:de
06c0: 63 6f 64 65 28 52 6f 75 74 65 29 2c 0a 09 52 6f code(Route),..Ro
06d0: 75 74 65 5f 67 65 6f 6d 65 74 72 79 20 3d 20 69 ute_geometry = i
06e0: 66 20 52 6f 75 74 65 5f 63 68 6f 69 63 65 20 3d f Route_choice =
06f0: 3a 3d 20 22 72 6f 75 74 65 5f 67 65 6f 6d 65 74 := "route_geomet
0700: 72 79 22 20 2d 3e 0a 09 09 70 72 6f 70 6c 69 73 ry" ->...proplis
0710: 74 73 3a 67 65 74 5f 76 61 6c 75 65 28 62 69 6e ts:get_value(bin
0720: 61 72 79 3a 6c 69 73 74 5f 74 6f 5f 62 69 6e 28 ary:list_to_bin(
0730: 52 6f 75 74 65 5f 63 68 6f 69 63 65 29 2c 20 50 Route_choice), P
0740: 72 6f 70 73 29 3b 0a 09 52 6f 75 74 65 5f 63 68 rops);..Route_ch
0750: 6f 69 63 65 20 3d 3a 3d 20 22 61 6c 74 65 72 6e oice =:= "altern
0760: 61 74 69 76 65 5f 67 65 6f 6d 65 74 72 69 65 73 ative_geometries
0770: 22 20 2d 3e 0a 09 09 25 68 64 20 6f 6e 6c 79 20 " ->...%hd only
0780: 69 66 20 61 6c 74 65 72 6e 61 74 69 76 65 20 74 if alternative t
0790: 68 6f 75 67 68 21 0a 09 09 25 66 6f 72 20 6e 6f hough!...%for no
07a0: 77 20 49 20 74 68 69 6e 6b 20 74 68 65 72 65 20 w I think there
07b0: 69 73 20 6f 6e 6c 79 20 65 76 65 72 20 6f 6e 65 is only ever one
07c0: 20 61 6c 74 65 72 6e 61 74 69 76 65 20 73 6f 20 alternative so
07d0: 74 68 61 74 20 69 73 20 77 68 79 20 77 65 20 70 that is why we p
07e0: 69 63 6b 20 68 64 0a 09 09 68 64 28 70 72 6f 70 ick hd...hd(prop
07f0: 6c 69 73 74 73 3a 67 65 74 5f 76 61 6c 75 65 28 lists:get_value(
0800: 62 69 6e 61 72 79 3a 6c 69 73 74 5f 74 6f 5f 62 binary:list_to_b
0810: 69 6e 28 52 6f 75 74 65 5f 63 68 6f 69 63 65 29 in(Route_choice)
0820: 2c 20 50 72 6f 70 73 29 29 0a 09 65 6e 64 2c 0a , Props))..end,.
0830: 09 25 54 68 61 74 20 69 73 20 61 6c 6c 20 66 6f .%That is all fo
0840: 72 20 6e 6f 77 3f 20 42 65 63 61 75 73 65 2e 2e r now? Because..
0850: 2e 0a 09 25 41 6e 64 20 74 68 65 73 65 20 64 6f ...%And these do
0860: 6e 27 74 20 73 65 65 6d 20 74 6f 20 61 63 74 75 n't seem to actu
0870: 61 6c 6c 79 20 62 65 20 72 65 74 75 72 6e 65 64 ally be returned
0880: 2c 20 68 65 6e 63 65 20 68 61 76 69 6e 67 20 74 , hence having t
0890: 6f 20 67 6f 20 64 6f 77 6e 20 74 68 65 20 72 6f o go down the ro
08a0: 75 74 65 20 6f 66 20 70 6f 6c 79 6c 69 6e 65 20 ute of polyline
08b0: 64 65 63 6f 64 69 6e 67 0a 09 25 52 6f 75 74 65 decoding..%Route
08c0: 5f 49 6e 73 74 72 75 63 74 69 6f 6e 73 20 3d 20 _Instructions =
08d0: 70 72 6f 70 6c 69 73 74 73 3a 67 65 74 5f 76 61 proplists:get_va
08e0: 6c 75 65 28 3c 3c 22 72 6f 75 74 65 5f 69 6e 73 lue(<<"route_ins
08f0: 74 72 75 63 74 69 6f 6e 73 22 3e 3e 2c 20 50 72 tructions">>, Pr
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0930: 74 6f 74 61 6c 5f 64 69 73 74 61 6e 63 65 22 3e total_distance">
0940: 3e 2c 20 70 72 6f 70 6c 69 73 74 73 3a 67 65 74 >, proplists:get
0950: 5f 76 61 6c 75 65 28 3c 3c 22 72 6f 75 74 65 5f _value(<<"route_
0960: 73 75 6d 6d 61 72 79 22 3e 3e 2c 20 50 72 6f 70 summary">>, Prop
0970: 73 29 29 2c 0a 09 25 41 6e 64 20 6e 65 65 64 20 s)),..%And need
0980: 74 6f 20 66 69 67 75 72 65 20 6f 75 74 20 68 6f to figure out ho
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09a0: 76 61 6c 75 65 73 2e 20 49 2e 65 20 6c 69 6b 65 values. I.e like
09b0: 20 78 70 61 74 68 2e 20 4a 75 73 74 20 6e 65 73 xpath. Just nes
09c0: 74 20 74 68 65 20 71 75 65 72 69 65 73 3f 20 4e t the queries? N
09d0: 6f 70 65 20 74 68 61 74 20 64 6f 65 73 6e 27 74 ope that doesn't
09e0: 20 77 6f 72 6b 0a 09 25 4c 69 6b 65 20 73 6f 3a work..%Like so:
09f0: 0a 09 7b 48 69 6e 74 5f 64 61 74 61 7d 20 3d 20 ..{Hint_data} =
0a00: 70 72 6f 70 6c 69 73 74 73 3a 67 65 74 5f 76 61 proplists:get_va
0a10: 6c 75 65 28 3c 3c 22 68 69 6e 74 5f 64 61 74 61 lue(<<"hint_data
0a20: 22 3e 3e 2c 20 50 72 6f 70 73 29 2c 0a 09 43 68 ">>, Props),..Ch
0a30: 65 63 6b 73 75 6d 20 3d 20 70 72 6f 70 6c 69 73 ecksum = proplis
0a40: 74 73 3a 67 65 74 5f 76 61 6c 75 65 28 3c 3c 22 ts:get_value(<<"
0a50: 63 68 65 63 6b 73 75 6d 22 3e 3e 2c 20 48 69 6e checksum">>, Hin
0a60: 74 5f 64 61 74 61 29 2c 0a 09 52 6f 75 74 65 5f t_data),..Route_
0a70: 67 65 6f 6d 65 74 72 79 5f 61 73 5f 73 74 72 69 geometry_as_stri
0a80: 6e 67 20 3d 20 62 69 6e 61 72 79 3a 62 69 6e 5f ng = binary:bin_
0a90: 74 6f 5f 6c 69 73 74 28 52 6f 75 74 65 5f 67 65 to_list(Route_ge
0aa0: 6f 6d 65 74 72 79 29 2c 0a 09 7b 43 68 65 63 6b ometry),..{Check
0ab0: 73 75 6d 2c 20 52 6f 75 74 65 5f 67 65 6f 6d 65 sum, Route_geome
0ac0: 74 72 79 5f 61 73 5f 73 74 72 69 6e 67 7d 2e 0a try_as_string}..
0ad0: 0a 0a 6d 61 79 62 65 5f 71 75 69 74 28 29 20 2d ..maybe_quit() -
0ae0: 3e 0a 09 41 72 67 73 20 3d 20 69 6e 69 74 3a 67 >..Args = init:g
0af0: 65 74 5f 61 72 67 75 6d 65 6e 74 73 28 29 2c 0a et_arguments(),.
0b00: 09 46 6f 75 6e 64 20 3d 20 6c 69 73 74 73 3a 6b .Found = lists:k
0b10: 65 79 66 69 6e 64 28 6e 6f 73 68 65 6c 6c 2c 20 eyfind(noshell,
0b20: 31 2c 20 41 72 67 73 29 2c 0a 09 69 66 20 46 6f 1, Args),..if Fo
0b30: 75 6e 64 20 3d 3a 3d 20 66 61 6c 73 65 20 2d 3e und =:= false ->
0b40: 0a 09 09 64 6f 6e 74 5f 71 75 69 74 3b 0a 09 74 ...dont_quit;..t
0b50: 72 75 65 20 2d 3e 0a 09 09 69 6e 69 74 3a 73 74 rue ->...init:st
0b60: 6f 70 28 29 0a 09 65 6e 64 2e 0a op()..end..