collect_links.py

"""
Copyright 2018 YoongiKim

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
"""


import time
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.common.by import By
from selenium.common.exceptions import ElementNotVisibleException, StaleElementReferenceException
import platform
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC


class CollectLinks:
    def __init__(self):
        executable = ''

        if platform.system() == 'Windows':
            print('Detected OS : Windows')
            executable = './chromedriver/chromedriver_win.exe'
        elif platform.system() == 'Linux':
            print('Detected OS : Linux')
            executable = './chromedriver/chromedriver_linux'
        elif platform.system() == 'Darwin':
            print('Detected OS : Mac')
            executable = './chromedriver/chromedriver_mac'
        else:
            assert False, 'Unknown OS Type'

        self.browser = webdriver.Chrome(executable)

    def get_scroll(self):
        pos = self.browser.execute_script("return window.pageYOffset;")
        return pos

    def wait_and_click(self, xpath):
        #  Sometimes click fails unreasonably. So tries to click at all cost.
        try:
            w = WebDriverWait(self.browser, 15)
            elem = w.until(EC.element_to_be_clickable((By.XPATH, xpath)))
            elem.click()
        except Exception as e:
            print('Click time out - {}'.format(xpath))
            print('Refreshing browser...')
            self.browser.refresh()
            time.sleep(2)
            return self.wait_and_click(xpath)

        return elem

    def google(self, keyword, add_url=""):
        self.browser.get("https://www.google.com/search?q={}&source=lnms&tbm=isch{}".format(keyword, add_url))

        time.sleep(1)

        print('Scrolling down')

        elem = self.browser.find_element_by_tag_name("body")

        for i in range(60):
            elem.send_keys(Keys.PAGE_DOWN)
            time.sleep(0.2)

        try:
            # btn_more = self.browser.find_element(By.XPATH, '//input[@value="결과 더보기"]')
            self.wait_and_click('//input[@id="smb"]')

            for i in range(60):
                elem.send_keys(Keys.PAGE_DOWN)
                time.sleep(0.2)

        except ElementNotVisibleException:
            pass

        photo_grid_boxes = self.browser.find_elements(By.XPATH, '//div[@class="rg_bx rg_di rg_el ivg-i"]')

        print('Scraping links')

        links = []

        for box in photo_grid_boxes:
            try:
                imgs = box.find_elements(By.TAG_NAME, 'img')

                for img in imgs:
                    src = img.get_attribute("src")
                    if src[0] != 'd':
                        links.append(src)

            except Exception as e:
                print('[Exception occurred while collecting links from google] {}'.format(e))

        print('Collect links done. Site: {}, Keyword: {}, Total: {}'.format('google', keyword, len(links)))
        self.browser.close()

        return set(links)

    def naver(self, keyword, add_url=""):
        self.browser.get("https://search.naver.com/search.naver?where=image&sm=tab_jum&query={}{}".format(keyword, add_url))

        time.sleep(1)

        print('Scrolling down')

        elem = self.browser.find_element_by_tag_name("body")

        for i in range(60):
            elem.send_keys(Keys.PAGE_DOWN)
            time.sleep(0.2)

        try:
            self.wait_and_click('//a[@class="btn_more _more"]')

            for i in range(60):
                elem.send_keys(Keys.PAGE_DOWN)
                time.sleep(0.2)

        except ElementNotVisibleException:
            pass

        photo_grid_boxes = self.browser.find_elements(By.XPATH, '//div[@class="photo_grid _box"]')

        print('Scraping links')

        links = []

        for box in photo_grid_boxes:
            try:
                imgs = box.find_elements(By.CLASS_NAME, '_img')

                for img in imgs:
                    src = img.get_attribute("src")
                    if src[0] != 'd':
                        links.append(src)
            except Exception as e:
                print('[Exception occurred while collecting links from naver] {}'.format(e))

        print('Collect links done. Site: {}, Keyword: {}, Total: {}'.format('naver', keyword, len(links)))
        self.browser.close()

        return set(links)

    def google_full(self, keyword, add_url=""):
        print('[Full Resolution Mode]')

        self.browser.get("https://www.google.co.kr/search?q={}&tbm=isch{}".format(keyword, add_url))
        time.sleep(1)

        elem = self.browser.find_element_by_tag_name("body")

        print('Scraping links')

        self.wait_and_click('//div[@data-ri="0"]')
        time.sleep(1)

        links = []
        count = 1

        last_scroll = 0
        scroll_patience = 0

        while True:
            try:
                imgs = self.browser.find_elements(By.XPATH, '//div[@class="irc_c i8187 immersive-container irc-rcd"]//img[@class="irc_mi"]')

                for img in imgs:
                    src = img.get_attribute('src')

                    if src not in links and src is not None:
                        links.append(src)
                        print('%d: %s'%(count, src))
                        count += 1

            except StaleElementReferenceException:
                # print('[Expected Exception - StaleElementReferenceException]')
                pass
            except Exception as e:
                print('[Exception occurred while collecting links from google_full] {}'.format(e))

            scroll = self.get_scroll()
            if scroll == last_scroll:
                scroll_patience += 1
            else:
                scroll_patience = 0
                last_scroll = scroll

            if scroll_patience >= 30:
                break

            elem.send_keys(Keys.RIGHT)

        links = set(links)

        print('Collect links done. Site: {}, Keyword: {}, Total: {}'.format('google_full', keyword, len(links)))
        self.browser.close()

        return links

    def naver_full(self, keyword, add_url=""):
        print('[Full Resolution Mode]')

        self.browser.get("https://search.naver.com/search.naver?where=image&sm=tab_jum&query={}{}".format(keyword, add_url))
        time.sleep(1)

        elem = self.browser.find_element_by_tag_name("body")

        print('Scraping links')

        self.wait_and_click('//div[@class="img_area _item"]')
        time.sleep(1)

        links = []
        count = 1

        last_scroll = 0
        scroll_patience = 0

        while True:
            try:
                imgs = self.browser.find_elements(By.XPATH,
                                                  '//div[@class="image_viewer_wrap _sauImageViewer"]//img[@class="_image_source"]')

                for img in imgs:
                    src = img.get_attribute('src')

                    if src not in links and src is not None:
                        links.append(src)
                        print('%d: %s' % (count, src))
                        count += 1

            except StaleElementReferenceException:
                # print('[Expected Exception - StaleElementReferenceException]')
                pass
            except Exception as e:
                print('[Exception occurred while collecting links from naver_full] {}'.format(e))

            scroll = self.get_scroll()
            if scroll == last_scroll:
                scroll_patience += 1
            else:
                scroll_patience = 0
                last_scroll = scroll

            if scroll_patience >= 30:
                break

            elem.send_keys(Keys.RIGHT)

        links = set(links)

        print('Collect links done. Site: {}, Keyword: {}, Total: {}'.format('naver_full', keyword, len(links)))
        self.browser.close()

        return links


if __name__ == '__main__':
    collect = CollectLinks()
    links = collect.naver_full('박보영')
    print(len(links), links)