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user_agent_parser.py at [50a1ba732d]
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user_agent_parser.py at [50a1ba732d]

File gluon/contrib/user_agent_parser.py artifact bbbb0c1942 part of check-in 50a1ba732d


"""
Extract client information from http user agent
The module does not try to detect all capabilities of browser in current form (it can easily be extended though).
Aim is
    * fast
    * very easy to extend
    * reliable enough for practical purposes
    * and assist python web apps to detect clients.
    
Taken from http://pypi.python.org/pypi/httpagentparser (MIT license)
Modified my Ross Peoples for web2py to better support iPhone and iPad.
"""
import sys
from storage import Storage

class DetectorsHub(dict):
    _known_types = ['os', 'dist', 'flavor', 'browser']

    def __init__(self, *args, **kw):
        dict.__init__(self, *args, **kw)
        for typ in self._known_types:
            self.setdefault(typ, [])
        self.registerDetectors()

    def register(self, detector):
        if detector.info_type not in self._known_types:
            self[detector.info_type] = [detector]
            self._known_types.insert(detector.order, detector.info_type)
        else:
            self[detector.info_type].append(detector)

    def reorderByPrefs(self, detectors, prefs):
        if prefs is None:
            return []
        elif prefs == []:
            return detectors
        else:
            prefs.insert(0, '')
            def key_name(d):
                return d.name in prefs and prefs.index(d.name) or sys.maxint
            return sorted(detectors, key=key_name)

    def __iter__(self):
        return iter(self._known_types)

    def registerDetectors(self):
        detectors = [v() for v in globals().values() \
                         if DetectorBase in getattr(v, '__mro__', [])]
        for d in detectors:
            if d.can_register:
                self.register(d)


class DetectorBase(object):
    name = "" # "to perform match in DetectorsHub object"
    info_type = "override me"
    result_key = "override me"
    order = 10 # 0 is highest
    look_for = "string to look for"
    skip_if_found = [] # strings if present stop processin
    can_register = False
    prefs = Storage() # dict(info_type = [name1, name2], ..)
    version_splitters = ["/", " "]
    _suggested_detectors = None

    def __init__(self):
        if not self.name:
            self.name = self.__class__.__name__
        self.can_register = (self.__class__.__dict__.get('can_register', True))

    def detect(self, agent, result):
        if agent and self.checkWords(agent):
            result[self.info_type] = Storage(name=self.name)
            version = self.getVersion(agent)
            if version:
                result[self.info_type].version = version
            return True
        return False

    def checkWords(self, agent):
        for w in self.skip_if_found:
            if w in agent:
                return False
        if self.look_for:
            return True
        return False

    def getVersion(self, agent):
        # -> version string /None
        vs = self.version_splitters
        return agent.split(self.look_for + vs[0])[-1].split(vs[1])[0].strip()


class OS(DetectorBase):
    info_type = "os"
    can_register = False
    version_splitters = [";", " "]


class Dist(DetectorBase):
    info_type = "dist"
    can_register = False


class Flavor(DetectorBase):
    info_type = "flavor"
    can_register = False


class Browser(DetectorBase):
    info_type = "browser"
    can_register = False


class Macintosh(OS):
    look_for = 'Macintosh'
    prefs = Storage(dist=None)
    def getVersion(self, agent):
        pass


class Firefox(Browser):
    look_for = "Firefox"


class Konqueror(Browser):
    look_for = "Konqueror"
    version_splitters = ["/", ";"]


class Opera(Browser):
    look_for = "Opera"
    def getVersion(self, agent):
        return agent.split(self.look_for)[1][1:].split(' ')[0]

class Netscape(Browser):
    look_for = "Netscape"

class MSIE(Browser):
    look_for = "MSIE"
    skip_if_found = ["Opera"]
    name = "Microsoft Internet Explorer"
    version_splitters = [" ", ";"]


class Galeon(Browser):
    look_for = "Galeon"


class Safari(Browser):
    look_for = "Safari"

    def checkWords(self, agent):
        unless_list = ["Chrome", "OmniWeb"]
        if self.look_for in agent:
            for word in unless_list:
                if word in agent:
                    return False
            return True

    def getVersion(self, agent):
        if "Version/" in agent:
            return agent.split('Version/')[-1].split(' ')[0].strip()
        else:
            # Mobile Safari
            return agent.split('Safari ')[-1].split(' ')[0].strip() 


class Linux(OS):
    look_for = 'Linux'
    prefs = Storage(browser=["Firefox"], 
                    dist=["Ubuntu", "Android"], flavor=None)

    def getVersion(self, agent):
        pass


class Macintosh(OS):
    look_for = 'Macintosh'
    prefs = Storage(dist=None, flavor=['MacOS'])
    def getVersion(self, agent):
        pass


class MacOS(Flavor):
    look_for = 'Mac OS'
    prefs = Storage(browser=['Firefox', 'Opera', "Microsoft Internet Explorer"])

    def getVersion(self, agent):
        version_end_chars = [';', ')']
        part = agent.split('Mac OS')[-1].strip()
        for c in version_end_chars:
            if c in part:
                version = part.split(c)[0]
                break
        return version.replace('_', '.')


class Windows(OS):
    look_for = 'Windows'
    prefs = Storage(browser=["Microsoft Internet Explorer", 'Firefox'],
                    dict=None, flavor=None)

    def getVersion(self, agent):
        v = agent.split('Windows')[-1].split(';')[0].strip()
        if ')' in v:
            v = v.split(')')[0]
        return v


class Ubuntu(Dist):
    look_for = 'Ubuntu'
    version_splitters = ["/", " "]
    prefs = Storage(browser=['Firefox'])


class Debian(Dist):
    look_for = 'Debian'
    version_splitters = ["/", " "]
    prefs = Storage(browser=['Firefox'])


class Chrome(Browser):
    look_for = "Chrome"
    version_splitters = ["/", " "]

class ChromeOS(OS):
    look_for = "CrOS"
    version_splitters = [" ", " "]
    prefs = Storage(browser=['Chrome'])
    def getVersion(self, agent):
        vs = self.version_splitters
        return agent.split(self.look_for+vs[0])[-1].split(vs[1])[1].strip()[:-1]

class Android(Dist):
    look_for = 'Android'

    def getVersion(self, agent):
        return agent.split('Android')[-1].split(';')[0].strip()


class iPhone(Dist):
    look_for = 'iPhone'

    def getVersion(self, agent):
        version_end_chars = ['like', ';', ')']
        part = agent.split('CPU OS')[-1].strip()
        for c in version_end_chars:
            if c in part:
                version = 'iOS ' + part.split(c)[0].strip()
                break
        return version.replace('_', '.')
        
class iPad(Dist):
    look_for = 'iPad'

    def getVersion(self, agent):
        version_end_chars = ['like', ';', ')']
        part = agent.split('CPU OS')[-1].strip()
        for c in version_end_chars:
            if c in part:
                version = 'iOS ' + part.split(c)[0].strip()
                break
        return version.replace('_', '.')

detectorshub = DetectorsHub()

def detect(agent):
    result = Storage()
    prefs = Storage()
    _suggested_detectors = []
    for info_type in detectorshub:
        if not _suggested_detectors:
            detectors = detectorshub[info_type]
            _d_prefs = prefs.get(info_type, [])
            detectors = detectorshub.reorderByPrefs(detectors, _d_prefs)
            if "detector" in locals():
                detector._suggested_detectors = detectors
        else:
            detectors = _suggested_detectors
        for detector in detectors:
            print "detector name: ", detector.name
            if detector.detect(agent, result):
                prefs = detector.prefs
                _suggested_detectors = detector._suggested_detectors
                break
    return result


class Result(Storage):
    def __missing__(self, k):
        return ""


def detect(agent):
    result = Result()
    _suggested_detectors = []
    for info_type in detectorshub:
        detectors = _suggested_detectors or detectorshub[info_type]
        for detector in detectors:
            if detector.detect(agent, result):
                if detector.prefs and not detector._suggested_detectors:
                    _suggested_detectors = detectorshub.reorderByPrefs(
                        detectors, detector.prefs.get(info_type))
                    detector._suggested_detectors = _suggested_detectors
                    break
    return result


def simple_detect(agent):
    """
    -> (os, browser) # tuple of strings
    """
    result = detect(agent)
    os_list = []
    if 'flavor' in result: os_list.append(result['flavor']['name'])
    if 'dist' in result: os_list.append(result['dist']['name'])
    if 'os' in result: os_list.append(result['os']['name'])

    os = os_list and " ".join(os_list) or "Unknown OS"
    os_version = os_list and (result['flavor'] and result['flavor'].get(
            'version')) or (result['dist'] and result['dist'].get('version')) \
            or (result['os'] and result['os'].get('version')) or ""
    browser = 'browser' in result and result['browser']['name'] \
        or 'Unknown Browser'
    browser_version = 'browser' in result \
        and result['browser'].get('version') or ""
    if browser_version:
        browser = " ".join((browser, browser_version))
    if os_version:
        os = " ".join((os, os_version))
    return os, browser


if __name__ == '__main__':
    import time
    import unittest

    data = (
        ("Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-GB; rv:1.9.0.10) Gecko/2009042315 Firefox/3.0.10",
         ('MacOS Macintosh X 10.5', 'Firefox 3.0.10'),
         {'flavor': {'version': 'X 10.5', 'name': 'MacOS'}, 'os': {'name': 'Macintosh'}, 'browser': {'version': '3.0.10', 'name': 'Firefox'}},),
        ("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_6) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.3 Safari/534.24,gzip(gfe)",
         ('MacOS Macintosh X 10.6.6', 'Chrome 11.0.696.3'),
         {'flavor': {'version': 'X 10.6.6', 'name': 'MacOS'}, 'os': {'name': 'Macintosh'}, 'browser': {'version': '11.0.696.3', 'name': 'Chrome'}},),
        ("Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2) Gecko/20100308 Ubuntu/10.04 (lucid) Firefox/3.6 GTB7.1",
         ('Ubuntu Linux 10.04', 'Firefox 3.6'),
         {'dist': {'version': '10.04', 'name': 'Ubuntu'}, 'os': {'name': 'Linux'}, 'browser': {'version': '3.6', 'name': 'Firefox'}},),
        ("Mozilla/5.0 (Linux; U; Android 2.2.1; fr-ch; A43 Build/FROYO) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1",
         ('Android Linux 2.2.1', 'Safari 4.0'),
         {'dist': {'version': '2.2.1', 'name': 'Android'}, 'os': {'name': 'Linux'}, 'browser': {'version': '4.0', 'name': 'Safari'}},),
        ("Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420+ (KHTML, like Gecko) Version/3.0 Mobile/1A543a Safari/419.3",
         ('MacOS IPhone X', 'Safari 3.0'),
         {'flavor': {'version': 'X', 'name': 'MacOS'}, 'dist': {'version': 'X', 'name': 'IPhone'}, 'browser': {'version': '3.0', 'name': 'Safari'}},),
        ("Mozilla/5.0 (X11; CrOS i686 0.0.0) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.27 Safari/534.24,gzip(gfe)",
         ('ChromeOS 0.0.0', 'Chrome 11.0.696.27'),
         {'os': {'name': 'ChromeOS', 'version': '0.0.0'}, 'browser': {'name': 'Chrome', 'version': '11.0.696.27'}},),
        ("Mozilla/4.0 (compatible; MSIE 6.0; MSIE 5.5; Windows NT 5.1) Opera 7.02 [en]",
         ('Windows NT 5.1', 'Opera 7.02'),
         {'os': {'name': 'Windows', 'version': 'NT 5.1'}, 'browser': {'name': 'Opera', 'version': '7.02'}},),
        ("Opera/9.80 (X11; Linux i686; U; en) Presto/2.9.168 Version/11.50",
         ("Linux", "Opera 9.80"),
         {"os": {"name": "Linux"}, "browser": {"name": "Opera", "version": "9.80"}},),
        ("Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20060127 Netscape/8.1",
         ("Windows NT 5.1", "Netscape 8.1"),
         {'os': {'name': 'Windows', 'version': 'NT 5.1'}, 'browser': {'name': 'Netscape', 'version': '8.1'}},),
        )
    
    class TestHAP(unittest.TestCase):
        def setUp(self):
            self.harass_repeat = 1000
            self.data = data

        def test_simple_detect(self):
            for agent, simple_res, res in data:
                self.assertEqual(simple_detect(agent), simple_res)

        def test_detect(self):
            for agent, simple_res, res in data:
                self.assertEqual(detect(agent), res)

        def test_harass(self):
            then = time.time()
            for agent, simple_res, res in data * self.harass_repeat:
                detect(agent)
            time_taken = time.time() - then
            no_of_tests = len(self.data) * self.harass_repeat
            print "\nTime taken for %s detecttions: %s" \
                % (no_of_tests, time_taken)
            print "Time taken for single detecttion: ", \
                time_taken / (len(self.data) * self.harass_repeat)

    unittest.main()