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Taddeüs Kroes
tothemoon
Commits
4853845d
Commit
4853845d
authored
8 years ago
by
Taddeüs Kroes
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Add exception handler and clean up code
parent
3ba9bcff
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1 changed file
api.py
+48
-29
48 additions, 29 deletions
api.py
with
48 additions
and
29 deletions
api.py
+
48
−
29
View file @
4853845d
...
...
@@ -8,31 +8,37 @@ import json
from
argparse
import
ArgumentParser
from
Queue
import
PriorityQueue
interval
=
2
# poll exchange tickers every 2 seconds
cap_interval
=
60
# poll check market cap every minut
e
# TODO: try round-robin queue instead of priority queue
# TODO: log update times to evaluate queue typ
e
exchanges
=
{
'
https://btc-e.com/api/3/ticker/btc_usd
'
:
[
'
btce
'
,
(
'
btc_usd
'
,
'
last
'
),
'
USD
'
,
interval
]
,
(
'
btce
'
,
(
'
btc_usd
'
,
'
last
'
),
'
USD
'
)
,
'
https://api.gdax.com/products/BTC-USD/ticker
'
:
[
'
coinbase
'
,
(
'
price
'
,),
'
USD
'
,
interval
]
,
(
'
coinbase
'
,
(
'
price
'
,),
'
USD
'
)
,
'
https://www.bitstamp.net/api/v2/ticker/btcusd/
'
:
[
'
bitstamp
'
,
(
'
last
'
,),
'
USD
'
,
interval
]
,
(
'
bitstamp
'
,
(
'
last
'
,),
'
USD
'
)
,
'
https://api.bitfinex.com/v1/pubticker/btcusd
'
:
[
'
bitfinex
'
,
(
'
last_price
'
,),
'
USD
'
,
interval
]
,
(
'
bitfinex
'
,
(
'
last_price
'
,),
'
USD
'
)
,
'
https://data.btcchina.com/data/ticker?market=btccny
'
:
[
'
btcchina
'
,
(
'
ticker
'
,
'
last
'
),
'
CNY
'
,
interval
]
,
(
'
btcchina
'
,
(
'
ticker
'
,
'
last
'
),
'
CNY
'
)
,
'
http://api.huobi.com/staticmarket/ticker_btc_json.js
'
:
[
'
huobi
'
,
(
'
ticker
'
,
'
last
'
),
'
CNY
'
,
interval
]
,
(
'
huobi
'
,
(
'
ticker
'
,
'
last
'
),
'
CNY
'
)
,
'
https://www.okcoin.com/api/v1/ticker.do?symbol=btc_usd
'
:
[
'
okcoin
'
,
(
'
ticker
'
,
'
last
'
),
'
CNY
'
,
interval
]
,
(
'
okcoin
'
,
(
'
ticker
'
,
'
last
'
),
'
CNY
'
)
,
'
https://api.kraken.com/0/public/Ticker?pair=XXBTZEUR
'
:
[
'
kraken
'
,
(
'
result
'
,
'
XXBTZEUR
'
,
'
c
'
,
0
),
'
EUR
'
,
interval
],
(
'
kraken
'
,
(
'
result
'
,
'
XXBTZEUR
'
,
'
c
'
,
0
),
'
EUR
'
),
}
marketcaps
=
{
'
https://api.coinmarketcap.com/v1/ticker/bitcoin/
'
:
[
'
coinmarketcap
'
,
(
0
,
'
market_cap_usd
'
),
'
USD
'
,
cap_interval
]
,
(
'
coinmarketcap
'
,
(
0
,
'
market_cap_usd
'
),
'
USD
'
)
,
}
queue
=
PriorityQueue
(
len
(
exchanges
))
status
=
{}
queue
=
PriorityQueue
(
len
(
exchanges
)
+
len
(
marketcaps
))
def
generate_requests
():
assert
queue
.
empty
()
...
...
@@ -40,15 +46,26 @@ def generate_requests():
for
url
in
exchanges
.
iterkeys
():
queue
.
put
((
0
,
url
))
for
url
in
marketcaps
.
iterkeys
():
queue
.
put
((
0
,
url
))
while
True
:
scheduled
,
url
=
queue
.
get
()
wait
=
scheduled
-
time
.
time
()
if
wait
>
0
:
time
.
sleep
(
wait
)
interval
=
status
[
url
][
1
][
1
]
time
.
sleep
(
min
(
wait
,
interval
))
yield
grequests
.
get
(
url
,
timeout
=
5
)
def
requeue_after_error
(
req
,
e
):
print
>>
sys
.
stderr
,
'
Error for %s:
'
%
req
.
url
,
e
.
message
status
[
req
.
url
][
1
][
0
]
+=
0.5
queue
.
put
((
status
[
req
.
url
][
1
][
0
],
req
.
url
))
if
__name__
==
'
__main__
'
:
# parse command line options
parser
=
ArgumentParser
(
description
=
'
Poll bitcoin API services.
'
)
...
...
@@ -56,36 +73,35 @@ if __name__ == '__main__':
default
=
'
/dev/shm/tothemoon
'
,
help
=
'
directory to save poll results in
'
'
(default dev/shm/tothemoon)
'
)
parser
.
add_argument
(
'
-i
'
,
'
--interval
'
,
metavar
=
'
SECONDS
'
,
type
=
float
,
default
=
interval
,
help
=
'
poll interval per exchange in seconds
'
'
(
default
%f)
'
%
interval
)
parser
.
add_argument
(
'
-i
'
,
'
--interval
'
,
metavar
=
'
SECONDS
=2
'
,
type
=
float
,
default
=
2
,
help
=
'
exchange poll
interval
'
)
parser
.
add_argument
(
'
-c
'
,
'
--cap-interval
'
,
metavar
=
'
SECONDS=60
'
,
type
=
float
,
default
=
60
,
help
=
'
market cap poll
interval
'
)
parser
.
add_argument
(
'
-l
'
,
'
--list
'
,
action
=
'
store_true
'
,
default
=
False
,
help
=
'
list
exchange
info
'
)
help
=
'
list
api
info
'
)
args
=
parser
.
parse_args
()
root
=
args
.
dir
for
ex
in
exchanges
.
itervalues
():
if
ex
[
0
]
!=
'
coinmarketcap
'
:
ex
[
3
]
=
args
.
interval
for
url
,
ex
in
exchanges
.
iteritems
():
status
[
url
]
=
ex
,
[
0
,
args
.
interval
]
for
url
,
cap
in
marketcaps
.
iteritems
():
status
[
url
]
=
cap
,
[
0
,
args
.
cap_interval
]
if
args
.
list
:
for
url
,
(
exid
,
indices
,
currency
,
interval
)
in
exchange
s
.
iteritems
():
for
url
,
(
(
exid
,
indices
,
currency
)
,
stat
)
in
statu
s
.
iteritems
():
print
exid
print
'
url:
'
,
url
print
'
currency:
'
,
currency
print
'
lookup: response[%s]
'
%
'
][
'
.
join
(
repr
(
i
)
for
i
in
indices
)
print
'
interval:
'
,
interval
,
'
seconds
'
print
'
path: %s/%s
'
%
(
root
,
exid
)
sys
.
exit
(
0
)
create_root
=
not
os
.
path
.
isdir
(
root
)
# clean up created files on exit
def
remove_files
():
for
ex
in
exchange
s
.
itervalues
():
path
=
root
+
'
/
'
+
ex
[
0
]
for
(
ex
id
,
indices
,
currency
),
stat
in
statu
s
.
itervalues
():
path
=
root
+
'
/
'
+
ex
id
if
os
.
path
.
exists
(
path
):
os
.
remove
(
path
)
...
...
@@ -106,9 +122,12 @@ if __name__ == '__main__':
# keep updating URLs from priority queue, adding them back to the queue
# scheduled after their current interval
try
:
for
res
in
grequests
.
imap
(
generate_requests
()):
exid
,
indices
,
currency
,
interval
=
exchanges
[
res
.
request
.
url
]
queue
.
put
((
time
.
time
()
+
interval
,
res
.
request
.
url
))
for
res
in
grequests
.
imap
(
generate_requests
(),
exception_handler
=
requeue_after_error
):
(
exid
,
indices
,
currency
),
stat
=
status
[
res
.
request
.
url
]
interval
=
stat
[
1
]
stat
[
0
]
=
scheduled
=
time
.
time
()
+
interval
queue
.
put
((
scheduled
,
res
.
request
.
url
))
last
=
res
.
json
()
for
i
in
indices
:
...
...
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