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#!/usr/bin/env python | |
# encoding: utf-8 | |
import json | |
from subprocess import Popen, PIPE | |
wrapper = u''' | |
(function run(globals) { | |
try { | |
var result = (%(func)s).apply(globals, %(args)s); | |
if ((typeof result) == 'string') { | |
result = JSON.stringify(result); | |
} | |
console.log(JSON.stringify({"result": result})) | |
} catch (e) { | |
console.log(JSON.stringify({error: e.message})); | |
} | |
})(%(globals)s); | |
''' | |
def execute(code, args=None, g=None, node_exec='node'): | |
if args is None: | |
args = [] | |
if g is None: | |
g = {} | |
assert isinstance(code, (str, unicode)) | |
assert isinstance(g, dict) | |
assert code.strip(" ").strip("\t").startswith('function'), "Code must be function" | |
prc = Popen(node_exec, shell=False, stderr=PIPE, stdout=PIPE, stdin=PIPE) | |
c = wrapper % { | |
'func': code, | |
'globals': json.dumps(g), | |
'args': json.dumps(args) | |
} | |
prc.stdin.write(c.encode('utf-8')) | |
prc.stdin.close() | |
prc.wait() | |
result = json.loads(prc.stdout.read()) | |
if 'result' in result: | |
result = result.get('result') | |
if isinstance(result, basestring): | |
result = json.dumps(result, ensure_ascii=False) | |
return result | |
else: | |
raise Exception(( | |
result.get('error'), | |
prc.stderr.read(), | |
)) | |
if __name__ == '__main__': | |
print execute('''function test () { | |
return 10; | |
}''') | |
print execute('''function (args) { | |
var result = 0; | |
args.map(function (i) { | |
result += i; | |
}); | |
return result; | |
}''', args=[[1, 2, 3, 4, 5]]) | |
print execute('''function () { | |
return 1.0/0; | |
}''') |
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