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from functools import reduce
try:
from funcparserlib.lexer import make_tokenizer
from funcparserlib.parser import (
some, maybe, many, finished, skip, NoParseError)
except ImportError as e:
print("Missing funcparserlib library. You need to install the 'parser' extra dependency set.")
raise e
from pyinflux import client
def parse_lines(lines):
"""
Parse multiple Write objects separeted by new-line character.
>>> print(LineParser.parse("foo b=1"))
foo b=1
>>> lines = []
>>> lines += ['cpu field=123']
>>> lines += ['cpu,host=serverA,region=us-west field1=1,field2=2']
>>> lines += ['cpu,host=serverA,region=us-west field1=1,field2=2 1234']
>>> print("\\n".join(map(str, parse_lines("\\n".join(lines)))))
cpu field=123
cpu,host=serverA,region=us-west field1=1,field2=2
cpu,host=serverA,region=us-west field1=1,field2=2 1234
"""
writes = map(LineParser.parse, lines.split("\n"))
return list(writes)
class LineParser(object):
specs = [
('Comma', (r',',)),
('Space', (r' ',)),
('Equal', (r'=',)),
('Quote', (r'"',)),
('Escape', (r'\\',)),
('Int', (r'[0-9]+(?![0-9\.])',)),
('Float', (r'-?(\.[0-9]+)|([0-9]+(\.[0-9]*)?)',)),
('Char', (r'.',)),
]
@classmethod
def tokenize(klass, line : str):
tokenizer = make_tokenizer(klass.specs)
return list(tokenizer(line))
@staticmethod
def parse(line):
"""
Parse a line from the POST request into a Write object.
>>> line='cpu a=1'; LineParser.parse(line); print(LineParser.parse(line))
<Line key=cpu tags=[] fields=[('a', 1)] timestamp=None>
cpu a=1
>>> print(LineParser.parse('yahoo.CHFGBP\\=X.ask,tag=foobar value=10.2'))
yahoo.CHFGBP\=X.ask,tag=foobar value=10.2
>>> LineParser.parse('cpu,host=serverA,region=us-west foo="bar"')
<Line key=cpu tags=[('host', 'serverA'), ('region', 'us-west')] fields=[('foo', 'bar')] timestamp=None>
>>> print(LineParser.parse('cpu host="serverA",region="us-west"'))
cpu host="serverA",region="us-west"
>>> line='cpu\\,01 host="serverA",region="us-west"'; \\
... LineParser.parse(line); print(LineParser.parse(line))
<Line key=cpu,01 tags=[] fields=[('host', 'serverA'), ('region', 'us-west')] timestamp=None>
cpu\,01 host="serverA",region="us-west"
>>> LineParser.parse('cpu host="server A",region="us west"')
<Line key=cpu tags=[] fields=[('host', 'server A'), ('region', 'us west')] timestamp=None>
>>> line='cpu ho\\=st="server A",region="us west"'; \\
... LineParser.parse(line); print(LineParser.parse(line))
<Line key=cpu tags=[] fields=[('ho=st', 'server A'), ('region', 'us west')] timestamp=None>
cpu ho\=st="server A",region="us west"
>>> print(LineParser.parse('cpu,ho\=st=server\ A field=123'))
cpu,ho\=st=server\ A field=123
# error: double name is accepted
>>> print(LineParser.parse('cpu,foo=bar,foo=bar field=123,field=123'))
cpu,foo=bar,foo=bar field=123,field=123
>>> print(LineParser.parse('cpu field12=12'))
cpu field12=12
>>> print(LineParser.parse('cpu field12=12 123123123'))
cpu field12=12 123123123
>>> try: print(LineParser.parse('cpu field12=12 1231abcdef123'))
... except NoParseError: pass
>>> print(LineParser.parse('cpu,x=3,y=4,z=6 field\ name="HH \\\\\\"World",x="asdf foo"'))
cpu,x=3,y=4,z=6 field\\ name="HH \\"World",x="asdf foo"
>>> print(LineParser.parse("cpu,x=3 field\ name=\\"HH \\\\\\"World\\",x=\\"asdf foo\\""))
cpu,x=3 field\\ name="HH \\"World",x="asdf foo"
>>> print(LineParser.parse("cpu foo=\\"bar\\" 12345"))
cpu foo="bar" 12345
>>> line='"measurement\ with\ quotes",tag\ key\ with\ spaces=tag\,value\,with"commas" field_key\\\\\\="string field value, only \\\\" need be quoted"'; \\
... LineParser.parse(line); print(LineParser.parse(line))
<Line key="measurement with quotes" tags=[('tag key with spaces', 'tag,value,with"commas"')] fields=[('field_key\\\\', 'string field value, only " need be quoted')] timestamp=None>
"measurement\ with\ quotes",tag\ key\ with\ spaces=tag\,value\,with"commas" field_key\\\\="string field value, only \\\" need be quoted"
>>> LineParser.parse('disk_free value=442221834240,working\ directories="C:\My Documents\Stuff for examples,C:\My Documents"')
<Line key=disk_free tags=[] fields=[('value', 442221834240), ('working directories', 'C:\\\\My Documents\\\\Stuff for examples,C:\\\\My Documents')] timestamp=None>
>>> LineParser.parse('disk_free value=442221834240,working\ directories="C:\My Documents\Stuff for examples,C:\My Documents" 123')
<Line key=disk_free tags=[] fields=[('value', 442221834240), ('working directories', 'C:\\\\My Documents\\\\Stuff for examples,C:\\\\My Documents')] timestamp=123>
>>> print(LineParser.parse('foo,foo=2 "field key with space"="string field"'))
foo,foo=2 field\ key\ with\ space="string field"
>>> print(LineParser.parse('foo,foo=2 field_key\\\\\\="string field"'))
foo,foo=2 field_key\\\\="string field"
>>> print(LineParser.parse('foo,foo=2 field_key="string\\\\" field"'))
foo,foo=2 field_key="string\\" field"
>>> line='foo field0="tag",field1=t,field2=true,field3=True,field4=TRUE'; \\
... LineParser.parse(line); print(LineParser.parse(line))
<Line key=foo tags=[] fields=[('field0', 'tag'), ('field1', True), ('field2', True), ('field3', True), ('field4', True)] timestamp=None>
foo field0="tag",field1=True,field2=True,field3=True,field4=True
>>> line='foo field1=f,field2=false,field3=False,field4=FALSE,field5="fag"'; \\
... LineParser.parse(line); print(LineParser.parse(line))
<Line key=foo tags=[] fields=[('field1', False), ('field2', False), ('field3', False), ('field4', False), ('field5', 'fag')] timestamp=None>
foo field1=False,field2=False,field3=False,field4=False,field5="fag"
>>> line='"measurement\ with\ quotes",tag\ key\ with\ spaces=tag\,value\,with"commas" field_key\\\\\\="string field value, only \\\\" need be quoted"'; \\
... LineParser.parse(line); print(LineParser.parse(line))
<Line key="measurement with quotes" tags=[('tag key with spaces', 'tag,value,with"commas"')] fields=[('field_key\\\\', 'string field value, only " need be quoted')] timestamp=None>
"measurement\ with\ quotes",tag\ key\ with\ spaces=tag\,value\,with"commas" field_key\\\\="string field value, only \\" need be quoted"
>>> LineParser.parse('"measurement\ with\ quotes" foo=1')
<Line key="measurement with quotes" tags=[] fields=[('foo', 1)] timestamp=None>
>>> print(LineParser.parse('K.5S,Ccpvo="eSLyE" value="7F\\\\\\\\\\\\""'))
K.5S,Ccpvo="eSLyE" value="7F\\\\\\\\\\\""
>>> print(LineParser.parse('K.5S,Ccpvo=a\\ b value=1'))
K.5S,Ccpvo=a\\ b value=1
"""
tokval = lambda t: t.value
joinval = "".join
someToken = lambda type: some(lambda t: t.type == type)
someCharValue = lambda string: \
reduce(lambda a, b: a + b,
map(lambda char:
some(lambda t: t.value == char) >> tokval,
string)) >> joinval
char = someToken('Char') >> tokval
space = someToken('Space') >> tokval
comma = someToken('Comma') >> tokval
quote = someToken('Quote') >> tokval
escape = someToken('Escape') >> tokval
equal = someToken('Equal') >> tokval
true_value = (someCharValue("true") | someCharValue("t") |
someCharValue("True") | someCharValue("TRUE") | someCharValue("T"))
false_value = (someCharValue("false") | someCharValue("f") |
someCharValue("False") | someCharValue("FALSE") | someCharValue("F"))
escape_space = skip(escape) + space >> joinval
escape_comma = skip(escape) + comma >> joinval
escape_equal = skip(escape) + equal >> joinval
escape_quote = skip(escape) + quote >> joinval
escape_escape = skip(escape) + escape >> joinval
plain_int_text = someToken('Int') >> tokval
plain_int = plain_int_text >> (lambda v: int(v))
plain_float_text = someToken('Float') >> tokval
plain_float = plain_float_text >> (lambda v: float(v))
identifier = many(char | plain_float_text | plain_int_text |
escape_space | escape_comma | escape_equal |
escape_escape | plain_int_text | quote) >> joinval
quoted_text_ = many(escape_quote | space | plain_int_text |
plain_float_text | char | comma |
escape) >> joinval
quoted_text = skip(quote) + quoted_text_ + skip(quote)
unquoted_text = many(escape_space | escape_comma |
escape_equal | escape_escape |
plain_int_text | char | quote) >> joinval
boolean_value = (true_value >> (lambda s: True)
| false_value >> (lambda s: False))
kv_value = plain_int | plain_float | quoted_text | boolean_value
kv = (quoted_text | unquoted_text) + skip(equal) + kv_value >> \
(lambda x: (x[0], x[1]))
tag = identifier + skip(equal) + identifier >> (lambda x: (x[0], x[1]))
def setter(obj, propert):
def r(val):
setattr(obj, propert, val)
return (propert, val)
return r
tags = many(skip(comma) + tag) >> (lambda x: x)
fields = (kv + many(skip(comma) + kv)) >> \
(lambda x: [x[0]] + x[1])
write = client.Line(None, None, None, None)
toplevel = (identifier >> setter(write, "key")) + \
maybe(tags >> setter(write, "tags")) + \
(skip(space) + (fields >> setter(write, "fields"))) + \
maybe(skip(space) + plain_int >> setter(write, "timestamp")) + \
skip(finished) >> (lambda x: x)
result = toplevel.parse(LineParser.tokenize(line))
# pprint(result)
return write
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