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test_parsers.py
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test_parsers.py
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# -*- coding: utf-8 -*-
import asyncio
import time
import warnings
from urllib.parse import urlparse
import requests
from bs4 import Tag
from selectolax.parser import Node
from uniparser import (Crawler, CrawlerRule, HostRule, JSONRuleStorage,
ParseRule, Uniparser)
from uniparser.crawler import RuleNotFoundError
from uniparser.exceptions import InvalidSchemaError
from uniparser.utils import (AiohttpAsyncAdapter, HTTPXAsyncAdapter,
HTTPXSyncAdapter, RequestsAdapter,
TorequestsAsyncAdapter, TorequestsSyncAdapter,
fix_relative_path)
warnings.filterwarnings('ignore', 'TimeParser')
HTML = '''
<html><head><title >This is HTML title</title></head>
<body>
<p class="title" name="dromouse"><b>This is article title</b></p>
<p class="body">
first part
<a class="a" id="link1"><!--invisible comment--></a>
<a class="a" href="http://example.com/2" id="link2">a2</a>
<a class="a" href="http://example.com/3" id="link3">a3</a>
and they lived at the bottom of a well.</p>
<p class="body">...</p>
<div>
<span>d1</span>
</div>
<div>
<span>d2</span>
</div>
'''
JSON = '''
{
"firstName": "John",
"lastName" : "doe",
"age" : 26,
"address" : {
"streetAddress": "naist street",
"city" : "Nara",
"postalCode" : "630-0192"
},
"prices": [
{
"price": 1
},
{
"price": 2
},
{
"price": 3
}
],
"phoneNums": [
{
"type" : "iPhone",
"number": "0123-4567-8888"
},
{
"type" : "home",
"number": "0123-4567-8910"
}
]
}
'''
XML = r'''
<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0">
<channel>
<title>Channel title</title>
<atom:link href="https://www.example.com/feed/" rel="self" type="application/rss+xml" />
<link>https://www.example.com</link>
<description>XML example</description>
<lastBuildDate>Fri, 31 Jan 2020 08:02:33 +0000</lastBuildDate>
<language>zh-CN</language>
<sy:updatePeriod>
hourly </sy:updatePeriod>
<sy:updateFrequency>1</sy:updateFrequency>
<item>
<title>This is a title</title>
<link>https://example.com/1/</link>
<comments>https://example.com/1/#comments</comments>
<pubDate>Fri, 31 Jan 2020 08:02:12 +0000</pubDate>
<dc:creator>
<![CDATA[creator]]>
</dc:creator>
<category>
<![CDATA[category]]>
</category>
<guid isPermaLink="false">https://www.example.com/?p=35293</guid>
<description>
<![CDATA[ description ]]>
</description>
<content:encoded>
<![CDATA[ <p><a href="https://example.com" class="home">homepage</a> some words </p>]]>
</content:encoded>
</item>
<item>
<title>This is a title2</title>
<link>https://example.com/2/</link>
<comments>https://example.com/1/#comments</comments>
<pubDate>Fri, 31 Jan 2020 08:02:12 +0000</pubDate>
<dc:creator>
<![CDATA[creator]]>
</dc:creator>
<category>
<![CDATA[category]]>
</category>
<guid isPermaLink="false">https://www.example.com/?p=35293</guid>
<description>
<![CDATA[ description ]]>
</description>
<content:encoded>
<![CDATA[ <p><a href="https://example.com" class="home">homepage</a> some words </p>]]>
</content:encoded>
</item>
</channel>
</rss>
'''
YAML = r'''
user1:
name: a
pwd: 123
user2:
name: b
pwd: 456
'''
TOML = """
# This is a TOML document.
title = "TOML Example"
[owner]
name = "ClericPy" # some comments
[example]
ports = [ 8001, 8001, 8002 ]
connection_max = 5000
enabled = true
"""
def test_context_parser():
uni = Uniparser()
# test get attribute
result = uni.context.parse({'a': 1}, 'a', 2)
# print(result)
assert result == 1
result = uni.context.parse({'a': 1}, 'b', 2)
# print(result)
assert result == 2
def test_css_parser():
uni = Uniparser()
# test get attribute
result = uni.css.parse(HTML, 'a', '@href')
# print(result)
assert result == [None, 'http://example.com/2', 'http://example.com/3']
# test get text
result = uni.css.parse(HTML, 'a.a', '$text')
# print(result)
assert result == ['', 'a2', 'a3']
# test get innerHTML, html
result = uni.css.parse(HTML, 'a', '$innerHTML')
# print(result)
assert result == ['<!--invisible comment-->', 'a2', 'a3']
result = uni.css.parse(HTML, 'a', '$html')
# print(result)
assert result == ['<!--invisible comment-->', 'a2', 'a3']
# test get outerHTML, string
result = uni.css.parse(HTML, 'a', '$outerHTML')
# print(result)
assert result == [
'<a class="a" id="link1"><!--invisible comment--></a>',
'<a class="a" href="http://example.com/2" id="link2">a2</a>',
'<a class="a" href="http://example.com/3" id="link3">a3</a>'
]
result = uni.css.parse(HTML, 'a', '$string')
# print(result)
assert result == [
'<a class="a" id="link1"><!--invisible comment--></a>',
'<a class="a" href="http://example.com/2" id="link2">a2</a>',
'<a class="a" href="http://example.com/3" id="link3">a3</a>'
]
# test get Tag object self
result = uni.css.parse(HTML, 'a', '$self')
# print(result)
assert all([isinstance(i, Tag) for i in result])
# test parsing Tag object
tag = uni.css.parse(HTML, 'p.body', '$self')[0]
result = uni.css.parse(tag, 'a', '$text')
# print(result)
assert result == ['', 'a2', 'a3']
# test parsing list of input_object
tags = uni.css.parse(HTML, 'div', '$self')
result = uni.css.parse(tags, 'span', '$text')
# print(result)
assert result == [['d1'], ['d2']]
# =================== test css1 ===================
result = uni.css1.parse('<a class="url" href="/">title</a>', 'a.url1',
'@href')
assert result is None
result = uni.css1.parse('<a class="url" href="/">title</a>', 'a.url',
'@href')
assert result == '/'
result = uni.css1.parse('<a class="url" href="/">title</a>', 'a.url',
'$text')
assert result == 'title'
result = uni.css1.parse('<a class="url" href="/">title</a>', 'a.url',
'$innerHTML')
assert result == 'title'
result = uni.css1.parse('<a class="url" href="/">title</a>', 'a.url',
'$html')
assert result == 'title'
result = uni.css1.parse('<a class="url" href="/">title</a>', 'a.url',
'$outerHTML')
assert result == '<a class="url" href="/">title</a>'
result = uni.css1.parse('<a class="url" href="/">title</a>', 'a.url',
'$string')
assert result == '<a class="url" href="/">title</a>'
result = uni.css1.parse('<a class="url" href="/">title</a>', 'a.url',
'$self')
assert isinstance(result, Tag)
def test_selectolax_parser():
uni = Uniparser()
# test get attribute
result = uni.se.parse(HTML, 'a', '@href')
# print(result)
assert result == [None, 'http://example.com/2', 'http://example.com/3']
# test get text
result = uni.se.parse(HTML, 'a.a', '$text')
# print(result)
assert result == ['', 'a2', 'a3']
# test get outerHTML, html
result = uni.se.parse(HTML, 'a', '$outerHTML')
# print(result)
assert result == [
'<a class="a" id="link1"><!--invisible comment--></a>',
'<a class="a" href="http://example.com/2" id="link2">a2</a>',
'<a class="a" href="http://example.com/3" id="link3">a3</a>'
]
result = uni.se.parse(HTML, 'a', '$string')
# print(result)
assert result == [
'<a class="a" id="link1"><!--invisible comment--></a>',
'<a class="a" href="http://example.com/2" id="link2">a2</a>',
'<a class="a" href="http://example.com/3" id="link3">a3</a>'
]
# test get Tag object self
result = uni.se.parse(HTML, 'a', '$self')
# print(result)
assert all([isinstance(i, Node) for i in result])
# test parsing Tag object
tag = uni.se.parse(HTML, 'p.body', '$self')[0]
result = uni.se.parse(tag, 'a', '$text')
# print(result)
assert result == ['', 'a2', 'a3']
# test parsing list of input_object
tags = uni.se.parse(HTML, 'div', '$self')
result = uni.se.parse(tags, 'span', '$text')
# print(result)
assert result == [['d1'], ['d2']]
# =================== test se1 ===================
result = uni.se1.parse('<a class="url" href="/">title</a>', 'a.url1',
'@href')
assert result == '', result
result = uni.se1.parse('<a class="url" href="/">title</a>', 'a.url',
'@href')
assert result == '/', result
result = uni.se1.parse('<a class="url" href="/">title</a>', 'a.url',
'$text')
assert result == 'title', result
result = uni.se1.parse('<a class="url" href="/">title</a>', 'a.url',
'$string')
assert result == '<a class="url" href="/">title</a>', result
result = uni.se1.parse('<a class="url" href="/">title</a>', 'a.url',
'$outerHTML')
assert result == '<a class="url" href="/">title</a>', result
result = uni.se1.parse('<a class="url" href="/">title</a>', 'a.url',
'$string')
assert result == '<a class="url" href="/">title</a>', result
result = uni.se1.parse('<a class="url" href="/">title</a>', 'a.url',
'$self')
assert isinstance(result, Node), result
result = uni.se1.parse('<a class="url" href="/">title</a>', 'a.url',
'$html')
assert result == 'title', result
result = uni.se1.parse('<a class="url" href="/">title</a>', 'a.url',
'$innerHTML')
assert result == 'title', result
def test_xml_parser():
uni = Uniparser()
# test get attribute
result = uni.xml.parse(XML, 'link', '@href')
# print(result)
assert result == ['https://www.example.com/feed/', None, None, None]
# test get text
result = uni.xml.parse(XML, 'creator', '$text')
# print(result)
assert result == [
'\n creator\n ',
'\n creator\n '
]
# test get innerXML
result = uni.xml.parse(XML, 'description', '$innerXML')
# print(result)
assert result == [
'XML example', '\n description \n ',
'\n description \n '
]
# test get outerXML
result = uni.xml.parse(XML, 'encoded', '$outerXML')
# print(result)
assert result == [
'<encoded>\n <p><a href="https://example.com" class="home">homepage</a> some words </p>\n </encoded>',
'<encoded>\n <p><a href="https://example.com" class="home">homepage</a> some words </p>\n </encoded>'
]
# test get Tag object self
result = uni.xml.parse(XML, 'link', '$self')
# print(result)
assert all([isinstance(i, Tag) for i in result])
# test parsing Tag object
tag = uni.xml.parse(XML, 'item', '$self')[0]
result = uni.xml.parse(tag, 'title', '$text')
# print(result)
assert result == ['This is a title']
# test parsing list of input_object
tags = uni.xml.parse(XML, 'item', '$self')
result = uni.xml.parse(tags, 'title', '$text')
# print(result)
assert result == [['This is a title'], ['This is a title2']]
def test_re_parser():
uni = Uniparser()
# ======================
# test re findall without () group
result = uni.re.parse(HTML, 'class="a"', '')
# print(result)
assert result == ['class="a"', 'class="a"', 'class="a"']
# test re findall with () group
result = uni.re.parse(HTML, 'class="(.*?)"', '')
# print(result)
assert result == ['title', 'body', 'a', 'a', 'a', 'body']
# ======================
# test re match $0
result = uni.re.parse(HTML, 'class="(a)"', '$0')
# print(result)
assert result == ['class="a"', 'class="a"', 'class="a"']
# test re match $1
result = uni.re.parse(HTML, 'class="(a)"', '$1')
# print(result)
assert result == ['a', 'a', 'a']
# ======================
# test re sub @xxx, with group id \1
result = uni.re.parse(HTML, '<a.*</a>', '')
result = uni.re.parse(result, 'class="(a)"', r'@class="\1 b"')
# print(result)
assert result == [
'<a class="a b" id="link1"><!--invisible comment--></a>',
'<a class="a b" href="http://example.com/2" id="link2">a2</a>',
'<a class="a b" href="http://example.com/3" id="link3">a3</a>'
]
# ======================
# test re.split
result = uni.re.parse('a\t \nb c', r'\s+', '-')
# print(result)
assert result == ['a', 'b', 'c']
# ======================
# test #
result = uni.re.parse('a\t \nb c', r'(\s+)', '#1')
# print(result)
assert result == '\t \n'
result = uni.re.parse('a\t \nb c', r'b(\s+)', '#0')
# print(result)
assert result == 'b '
def test_jsonpath_parser():
uni = Uniparser()
# test default value ''
result = uni.jsonpath.parse(JSON, 'firstName', '')
# print(result)
assert result == ['John']
# test value=$value
result = uni.jsonpath.parse(JSON, 'firstName', '$value')
# print(result)
assert result == ['John']
# test absolute path
result = uni.jsonpath.parse(JSON, '$.address.city', '')
# print(result)
assert result == ['Nara']
# test slice
result = uni.jsonpath.parse(JSON, '$.phoneNums[1:]', '')
# print(result)
assert result == [{'type': 'home', 'number': '0123-4567-8910'}]
# test filter large than
result = uni.jsonpath.parse(JSON, '$.prices[?(@.price > 1)]', '')
# print(result)
assert result == [{'price': 2}, {'price': 3}]
# test filter2
result = uni.jsonpath.parse(JSON, '$.phoneNums[?(@.type = "iPhone")]', '')
# print(result)
assert result == [{'type': 'iPhone', 'number': '0123-4567-8888'}]
# test other attributes, full_path
result = uni.jsonpath.parse(JSON, 'firstName', '$full_path')
# print(result)
assert str(result) == "[Fields('firstName')]"
def test_objectpath_parser():
uni = Uniparser()
# test default value ''
result = uni.objectpath.parse(JSON, '$.firstName', '')
# print(result)
assert result == 'John'
# test absolute path
result = uni.objectpath.parse(JSON, '$.address.city', '')
# print(result)
assert result == 'Nara'
# test slice, not support...........
# result = uni.objectpath.parse(JSON, '$.phoneNums[0:1]', '')
# print(result)
# assert result == [{'type': 'home', 'number': '0123-4567-8910'}]
# test filter large than
result = uni.objectpath.parse(JSON, '$.prices[@.price > 1]', '')
# print(result)
assert result == [{'price': 2}, {'price': 3}]
# test filter2
result = uni.objectpath.parse(JSON, '$.phoneNums[@.type is "iPhone"]', '')
# print(result)
assert result == [{'type': 'iPhone', 'number': '0123-4567-8888'}]
def test_jmespath_parser():
uni = Uniparser()
# test alias
result = uni.json.parse(JSON, 'firstName', '')
# print(result)
assert result == 'John'
# test default value ''
result = uni.jmespath.parse(JSON, 'firstName', '')
# print(result)
assert result == 'John'
# test absolute path
result = uni.jmespath.parse(JSON, 'address.city', '')
# print(result)
assert result == 'Nara'
# test filter index
result = uni.jmespath.parse(JSON, "prices[1].price", '')
# print(result)
assert result == 2
# test filter slice
result = uni.jmespath.parse(JSON, "prices[1:3].price", '')
# print(result)
assert result == [2, 3]
# test attribute equals filter, use single-quote is ok, double-quote is invalid!
result = uni.jmespath.parse(JSON, "phoneNums[?type == 'iPhone'].number", '')
# print(result)
assert result == ['0123-4567-8888']
# filt by number, use ``
result = uni.jmespath.parse(JSON, "prices[?price > `1`].price", '')
# print(result)
assert result == [2, 3]
def test_python_parser():
uni = Uniparser()
# ===================== test getitem =====================
# getitem with index
result = uni.python.parse([1, 2, 3], 'getitem', '[-1]')
# print(result)
assert result == 3
# getitem with index
result = uni.python.parse([1, 2, 3], 'get', '[-1]')
# print(result)
assert result == 3
# getitem with slice
result = uni.python.parse([1, 2, 3], 'getitem', '[:2]')
# print(result)
assert result == [1, 2]
result = uni.python.parse([1, 2, 3, 4, 5], 'getitem', '[1::2]')
# print(result)
assert result == [2, 4]
result = uni.python.parse({'a': '1'}, 'getitem', 'a')
# print(result)
assert result == '1'
result = uni.python.parse({'a': '1'}, 'getitem', 'b')
# print(result)
# key error returns the bad key
assert str(result) == "'b'" and isinstance(result, KeyError)
# ===================== test split =====================
# split by None
result = uni.python.parse('a b\tc \n \td', 'split', '')
# print(result)
assert result == ['a', 'b', 'c', 'd']
# split by 's'
result = uni.python.parse('asbscsd', 'split', 's')
# print(result)
assert result == ['a', 'b', 'c', 'd']
# ===================== test join =====================
# join by ''
result = uni.python.parse(['a', 'b', 'c', 'd'], 'join', '')
# print(result)
assert result == 'abcd'
# ===================== test const =====================
# const as input_object
result = uni.python.parse(['a', 'b', 'c', 'd'], 'const', '')
# print(result)
assert result == ['a', 'b', 'c', 'd']
# const as value
result = uni.python.parse(['a', 'b', 'c', 'd'], 'const', 'abcd')
# print(result)
assert result == 'abcd'
# ===================== test template =====================
# const as input_object
result = uni.python.parse(['a', 'b', 'c', 'd'], 'template',
'1 $input_object 2')
# print(result)
assert result == "1 ['a', 'b', 'c', 'd'] 2"
# const as value
result = uni.python.parse({
'a': 'aaaa',
'b': 'bbbb'
}, 'template', '$a + $b = ?')
# print(result)
assert result == 'aaaa + bbbb = ?'
# ===================== test index =====================
result = uni.python.parse(['a', 'b', 'c', 'd'], 'index', '-1')
# print(result)
assert result == 'd'
result = uni.python.parse({'a': 1}, 'index', 'a')
# print(result)
assert result == 1
# ===================== test chain =====================
result = uni.python.parse(['a', 'b', ['c', 'd']], 'chain', '')
# print(result)
assert result == ['a', 'b', 'c', 'd']
result = uni.python.parse(['aaa', ['b'], ['c', 'd']], 'chain', '')
# print(result)
assert result == ['a', 'a', 'a', 'b', 'c', 'd']
# ===================== test sort =====================
result = uni.python.parse(*['adcb', 'sort', ''])
# print(result)
assert result == ['a', 'b', 'c', 'd']
result = uni.python.parse(*[[1, 3, 2, 4], 'sort', 'desc'])
# print(result)
assert result == [4, 3, 2, 1]
# ===================== test strip =====================
result = uni.python.parse(*['aabbcc', 'strip', 'ac'])
# print(result)
assert result == 'bb'
result = uni.python.parse(*[' bb\t\n', 'strip', ''])
# print(result)
assert result == 'bb'
result = uni.python.parse(*[' \t\n', 'default', 'default'])
# print(result)
assert result == 'default'
result = uni.python.parse(*['', 'default', 'default'])
# print(result)
assert result == 'default'
result = uni.python.parse(*['a', 'default', 'default'])
# print(result)
assert result == 'a'
# ===================== test base64 =====================
result = uni.python.parse('abc', 'base64_encode', '')
# print(result)
assert result == 'YWJj'
result = uni.python.parse('YWJj', 'base64_decode', '')
# print(result)
assert result == 'abc'
# ===================== test parser.__call__() =====================
result = uni.python('abc', 'base64_encode', '')
# print(result)
assert result == 'YWJj'
result = uni.python('YWJj', 'base64_decode', '')
# print(result)
assert result == 'abc'
# test index int
assert uni.python(*['a', '0', 'b']) == 'a'
assert uni.python(*['', '0', 'b']) == 'b'
assert uni.python(*[None, '0', 'b']) == 'b'
assert uni.python(*[{0: 'a'}, '0', 'a']) == 'a'
assert uni.python(*[['a'], '0', 'b']) == 'a'
# test null param
assert uni.python(*['a', '', 'abc']) == 'abc'
def test_udf_parser():
uni = Uniparser()
context = {'a': 1}
# ===================== test dangerous words =====================
assert uni.udf.parse('abcd', 'open', context) is NotImplemented
assert uni.udf.parse('abcd', 'input', context) is NotImplemented
assert uni.udf.parse('abcd', 'input_object', context) is not NotImplemented
assert uni.udf.parse('abcd', 'exec', context) is NotImplemented
assert uni.udf.parse('abcd', 'eval', context) is NotImplemented
# ===================== test udf with context=====================
# return a variable like context, one line code.
result = uni.udf.parse('abcd', 'context', context)
# print(result)
assert result == context
# return a variable like context(json), one line code.
result = uni.udf.parse('abcd', 'context["a"]', '{"a": 1}')
# print(result)
assert result == 1
# return a variable like context, lambda function.
# context will be set to exec's globals
result = uni.udf.parse(
'abcd', 'parse = lambda input_object: (input_object, context)', context)
# print(result)
assert result == ('abcd', context)
# return a variable like context, `def` function.
# context will be set to exec's globals
scode = '''
def parse(item):
return (item, context)
'''
result = uni.udf.parse('abcd', scode, context)
# print(result)
assert result == ('abcd', context)
# ===================== test udf without context=====================
# test python code without import; use `lambda` and `def`
result = uni.udf.parse(JSON, 'parse = lambda item: item.strip()[5:5+9]', '')
# print(result)
assert result == 'firstName'
# test python code without import; use `lambda` and `def`
result = uni.udf.parse(JSON, 'def parse(item): return item.strip()[5:5+9]',
'')
# print(result)
assert result == 'firstName'
# test python code with import, raise RuntimeError
scode = '''
def parse(item):
import json
return json.loads(item)['firstName']
'''
result = uni.udf.parse(JSON, scode, '')
# print(result)
assert result == 'John'
# test python code with import, no raise RuntimeError
uni.udf._ALLOW_IMPORT = True
result = uni.udf.parse(JSON, scode, '')
# print(result)
assert result == 'John'
# test python code without parse function, using eval
result = uni.udf.parse('hello', 'input_object + " world."', '')
# print(result)
assert result == 'hello world.'
# test alias obj
result = uni.udf.parse('hello', 'obj + " world."', '')
# print(result)
assert result == 'hello world.'
# test custom locals from context
result = uni.udf.parse('', 'abc', {'locals': {'abc': True}})
# print(result)
assert result is True
def test_loader_parser():
uni = Uniparser()
# ===================== test getitem =====================
# yaml
result = uni.loader.parse(YAML, 'yaml', '')
# print(result)
assert result == {
'user1': {
'name': 'a',
'pwd': 123
},
'user2': {
'name': 'b',
'pwd': 456
}
}
# toml
result = uni.loader.parse(TOML, 'toml', '{"decoder": null}')
# print(result)
assert result == {
'title': 'TOML Example',
'owner': {
'name': 'ClericPy'
},
'example': {
'ports': [8001, 8001, 8002],
'connection_max': 5000,
'enabled': True
}
}
# json
result = uni.loader.parse(JSON, 'json', '{"parse_int": null}')
# print(result)
assert result['age'] == 26
# base64 lib
result = uni.loader.parse('a', 'b64encode', '')
# print(result)
assert result == 'YQ=='
result = uni.loader.parse('YQ==', 'b64decode', '')
# print(result)
assert result == 'a'
result = uni.loader.parse('a', 'b16encode', '')
# print(result)
assert uni.loader.parse(result, 'b16decode', '') == 'a'
result = uni.loader.parse('a', 'b32encode', '')
# print(result)
assert uni.loader.parse(result, 'b32decode', '') == 'a'
result = uni.loader.parse('a', 'b85encode', '')
# print(result)
assert uni.loader.parse(result, 'b85decode', '') == 'a'
def test_time_parser():
timestamp = '1580732985.1873155'
time_string = '2020-02-03 20:29:45'
time_string_timezone = '2020-02-03T20:29:45 +0000'
uni = Uniparser()
uni.time.LOCAL_TIME_ZONE = +8
# translate time_string into timestamp float
result = uni.time.parse(time_string, 'encode', '')
# print(result)
assert int(result) == int(float(timestamp))
result = uni.time.parse(timestamp, 'decode', '')
# print(result)
assert result == time_string
result = uni.time.parse(result, 'encode', '')
# print(result)
assert int(result) == int(float(timestamp))
result_time_zone = uni.time.parse(time_string_timezone, 'encode',
'%Y-%m-%dT%H:%M:%S %z')
# print(result_time_zone)
assert int(result_time_zone) == int(float(timestamp))
# =============================================
# set a new timezone as local timezone +1, time will be 1 hour earlier than local.
uni.time.LOCAL_TIME_ZONE += 1
# same timestamp, different tz, earlier time_string will be larger than the old one.
new_result = uni.time.parse(timestamp, 'decode', '')
# print(new_result)
# print(time_string)
assert new_result > time_string
# same time_string, different tz, earlier timestamp is less than the old one.
new_result = uni.time.parse(time_string, 'encode', '')
# print(new_result - int(float(timestamp)))
assert new_result - int(float(timestamp)) == -1 * 3600
def test_crawler_rule():
# Simple usage of Uniparser and CrawlerRule
uni = Uniparser()
crawler_rule = CrawlerRule('test', {
'url': 'http://httpbin.org/get',
'method': 'get'
}, [{
"name": "rule1",
"chain_rules": [
['objectpath', 'JSON.url', ''],
['python', 'getitem', '[:4]'],
[
'udf',
'(context["resp"].url, context["request_args"]["url"], input_object)',
''
],
],
"child_rules": []
}], '')
resp = requests.request(timeout=3, **crawler_rule['request_args'])
result = uni.parse(resp.text, crawler_rule, context={'resp': resp})
# print(result)
assert result == {
'test': {
'rule1':
('http://httpbin.org/get', 'http://httpbin.org/get', 'http')
}
}
crawler_rule_json = crawler_rule.to_json()
# print(crawler_rule_json)
assert crawler_rule_json == r'{"name": "test", "parse_rules": [{"name": "rule1", "chain_rules": [["objectpath", "JSON.url", ""], ["python", "getitem", "[:4]"], ["udf", "(context[\"resp\"].url, context[\"request_args\"][\"url\"], input_object)", ""]], "child_rules": []}], "request_args": {"url": "http://httpbin.org/get", "method": "get"}, "regex": ""}'
crawler_rule_dict = crawler_rule.to_dict()
# print(crawler_rule_dict)
# yapf: disable
assert crawler_rule_dict == {'name': 'test', 'parse_rules': [{'name': 'rule1', 'chain_rules': [['objectpath', 'JSON.url', ''], ['python', 'getitem', '[:4]'], ['udf', '(context["resp"].url, context["request_args"]["url"], input_object)', '']], 'child_rules': []}], 'request_args': {'url': 'http://httpbin.org/get', 'method': 'get'}, 'regex': ''}
# yapf: enable
# saving some custom kwargs to crawler_rule
crawler_rule['context'] = {'a': 1, 'b': {'c': 2}}
# print(crawler_rule)
# yapf: disable
assert crawler_rule == {'name': 'test', 'parse_rules': [{'name': 'rule1', 'chain_rules': [['objectpath', 'JSON.url', ''], ['python', 'getitem', '[:4]'], ['udf', '(context["resp"].url, context["request_args"]["url"], input_object)', '']], 'child_rules': []}], 'request_args': {'url': 'http://httpbin.org/get', 'method': 'get'}, 'regex': '', 'context': {'a': 1, 'b': {'c': 2}}}
# yapf: enable
host_rule = HostRule('importpython.com')
crawler_rule_json = '{"name":"C-1583501370","request_args":{"method":"get","url":"https://importpython.com/blog/feed/"},"parse_rules":[{"name":"text","chain_rules":[["xml","channel>item>title","$text"],["python","getitem","[0]"]],"childs":""},{"name":"url","chain_rules":[["xml","channel>item>link","$text"],["python","getitem","[0]"]],"childs":""}],"regex":"https://bad_url_host.com/blog/feed/$"}'
try:
host_rule.add_crawler_rule(crawler_rule_json)
assert NotImplementedError
except AssertionError as err:
assert err
assert host_rule['crawler_rules'] == {}
crawler_rule = CrawlerRule.loads(crawler_rule_json)
crawler_rule['regex'] = r'https?://importpython\.com/.*'
host_rule.add_crawler_rule(crawler_rule)
assert host_rule['crawler_rules']
assert not host_rule.findall('https://bad_url_host.com/')
assert host_rule.findall('https://importpython.com/')
def test_default_usage():
# 1. prepare for storage to save {'host': HostRule}
uni = Uniparser()
storage = {}
test_url = 'http://httpbin.org/get'
crawler_rule = CrawlerRule(
'test_crawler_rule',
{
'url': 'http://httpbin.org/get',
'method': 'get'
},
[{
"name": "rule1",
"chain_rules": [
['objectpath', 'JSON.url', ''],
['python', 'getitem', '[:4]'],
['udf', '(context["resp"].url, input_object)', ''],
],
"child_rules": []
}],
'https?://httpbin.org/get',
)
host = urlparse(test_url).netloc
host_rule = HostRule(host=host)
host_rule.add_crawler_rule(crawler_rule)
# same as: json_string = host_rule.to_json()
json_string = host_rule.dumps()
# print(json_string)
assert json_string == r'{"host": "httpbin.org", "crawler_rules": {"test_crawler_rule": {"name": "test_crawler_rule", "parse_rules": [{"name": "rule1", "chain_rules": [["objectpath", "JSON.url", ""], ["python", "getitem", "[:4]"], ["udf", "(context[\"resp\"].url, input_object)", ""]], "child_rules": []}], "request_args": {"url": "http://httpbin.org/get", "method": "get"}, "regex": "https?://httpbin.org/get"}}}'
# 2. add HostRule to storage, sometimes save on redis
storage[host_rule['host']] = json_string
# ============================================
# start to crawl
# 1. set a example url
test_url1 = test_url
# 2. find the HostRule
json_string = storage.get(host)
# 3. HostRule init: load from json
# same as: host_rule = HostRule.from_json(json_string)
host_rule = HostRule.loads(json_string)
# print(crawler_rule)
# 4. now search / match the url with existing rules
crawler_rule = host_rule.search(test_url1)
# print(crawler_rule)
# yapf: disable
assert crawler_rule == {'name': 'test_crawler_rule', 'parse_rules': [{'name': 'rule1', 'chain_rules': [['objectpath', 'JSON.url', ''], ['python', 'getitem', '[:4]'], ['udf', '(context["resp"].url, input_object)', '']], 'child_rules': []}], 'request_args': {'url': 'http://httpbin.org/get', 'method': 'get'}, 'regex': 'https?://httpbin.org/get'}
# yapf: enable
# print(host_rule.match(test_url1))
assert crawler_rule == host_rule.match(test_url1)
# 5. send request as crawler_rule's request_args, download the page source code
resp = requests.request(**crawler_rule['request_args'])
source_code = resp.text
# 6. parse the whole crawler_rule as crawler_rule's with uniparser. set context with resp
assert isinstance(crawler_rule, CrawlerRule)
result = uni.parse(source_code, crawler_rule, context={'resp': resp})
# print(result)
assert result == {
'test_crawler_rule': {
'rule1': ('http://httpbin.org/get', 'http')
}
}
# ===================== while search failed =====================
# given a url not matched the pattern
test_url2 = 'http://notmatch.com'
crawler_rule2 = host_rule.search(test_url2)
assert crawler_rule2 is None
# ===================== shared context =====================
# !!! use context by updating rule.context variable
new_parse = '''
def parse(input_object):
context['new_key'] = 'cleared'
return 'ok'
'''
crawler_rule.context.update({'new_key': 'new_value'})
crawler_rule.clear_parse_rules()
crawler_rule.add_parse_rule({
'name': 'rule1',
'chain_rules': [['objectpath', 'JSON.url', ''],
['python', 'getitem', '[:4]'], ['udf', new_parse, '']],
'child_rules': []
})
result = uni.parse(source_code, crawler_rule)
# print(result)
assert result == {'test_crawler_rule': {'rule1': 'ok'}}
# print(crawler_rule.context)
# now the crawler_rule.context has been updated as 'cleared'.
assert crawler_rule.context['new_key'] == 'cleared'
def test_uni_parser():
uni = Uniparser()
# ===================================================
# 1. test Uniparser's parse_parse_rule
rule1 = ParseRule(
'rule1',
[['python', 'getitem', '[:7]'],
['udf', 'str(input_object)+" "+context["key"]', '']],
[],
)
result = uni.parse(HTML, rule1, {'key': 'hello world'})
# print(result)
assert result == {'rule1': '\n<html> hello world'}
json_string = r'{"name": "rule1", "chain_rules": [["python", "getitem", "[:7]"], ["udf", "str(input_object)+\" \"+context[\"key\"]", ""]], "child_rules": []}'
# print(rule1.dumps(), rule1.to_json(), json_string)
assert rule1.dumps() == rule1.to_json() == json_string
loaded_rule = ParseRule.from_json(json_string)
assert isinstance(loaded_rule, ParseRule)
assert loaded_rule == ParseRule.loads(json_string)
# print(loaded_rule)
# ===================================================
# # 2. test Uniparser's nested parse_parse_rule
rule2 = ParseRule('rule2', [['udf', 'input_object[::-1]', '']], [])
rule1['child_rules'].append(rule2)
rule3 = ParseRule(
'rule3', [['udf', 'input_object[::-1]', '']],
[ParseRule('rule4', [['udf', 'input_object[::-1]', '']], [])])
rule1['child_rules'].append(rule3)
# init parse rule
parse_rule = ParseRule(
'parse_rule',
[['css', 'p', '$outerHTML'], ['css', 'b', '$text'],