#coding=utf-8

import requests

from bs4 import BeautifulSoup

import urllib.request as ur

import urllib.parse as par

import re

#cookie 自动获取

#cookie_start = "entrezSort=pubmed:; "

#cookie_end = "; _ga=GA1.2.82560226.1459065437; _gat=1; ncbi_prevPHID=3971636F6DCF48491459222804198SID; prevselfurl=http%3A//www.ncbi.nlm.nih.gov/; unloadnext=jsevent%3Dunloadnext%26ncbi_pingaction%3Dunload%26eventid%3D1%26jsperf_dns%3D3923%26jsperf_connect%3D252%26jsperf_ttfb%3D310%26jsperf_basePage%3D9%26jsperf_frontEnd%3D4645%26jsperf_navType%3D0%26jsperf_redirectCount%3D0%26maxScroll_x%3D0%26maxScroll_y%3D0%26currScroll_x%3D0%26currScroll_y%3D0%26hasScrolled%3Dfalse%26ncbi_phid%3D3971636F6DCF48491459222804198SID%26sgSource%3Dnative"

pubmed_url = r'http://www.ncbi.nlm.nih.gov/pubmed'

pubmed_r = requests.get(pubmed_url)

print(pubmed_r.cookies)

pubmed_cookie_dict = requests.utils.dict_from_cookiejar(pubmed_r.cookies)

print(pubmed_cookie_dict)

cookie = ";".join(["%s=%s" % (k, v) for k, v in pubmed_cookie_dict.items()])

print(cookie)

#heads

heads={

    "Host":"www.ncbi.nlm.nih.gov",

    "Origin":"http://www.ncbi.nlm.nih.gov",

    "Referer":"http://www.ncbi.nlm.nih.gov/pubmed",

    "User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.85 Safari/537.36",

    "Cookie": cookie

}

kw_url="http://www.ncbi.nlm.nih.gov/pubmed/?term=bone+fracture+&EntrezSystem2.PEntrez.PubMed.Pubmed_PageController.PreviousPageName=results&EntrezSystem2.PEntrez.PubMed.Pubmed_PageController.SpecialPageName=&EntrezSystem2.PEntrez.PubMed.Pubmed_Facets.FacetsUrlFrag=filters%3D&EntrezSystem2.PEntrez.PubMed.Pubmed_Facets.FacetSubmitted=false&EntrezSystem2.PEntrez.PubMed.Pubmed_Facets.BMFacets=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.sPresentation=docsum&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.sPageSize=200&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.sSort=none&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.FFormat=docsum&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.FSort=&email_format=docsum&email_sort=&email_count=20&email_start=1&email_address=&email_subj=bone+fracture+-+PubMed&email_add_text=&EmailCheck1=&EmailCheck2=&coll_start=1&citman_count=20&citman_start=1&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.FileFormat=docsum&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.LastPresentation=docsum&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.Presentation=docsum&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.PageSize=200&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.LastPageSize=200&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.Sort=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.LastSort=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.FileSort=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.Format=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.LastFormat=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.PrevPageSize=200&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.PrevPresentation=docsum&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.PrevSort=&CollectionStartIndex=1&CitationManagerStartIndex=1&CitationManagerCustomRange=false&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_ResultsController.ResultCount=188348&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_ResultsController.RunLastQuery=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Entrez_Pager.cPage=1&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Entrez_Pager.cPage=1&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.sPresentation2=docsum&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.sPageSize2=20&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.sSort2=none&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.FFormat2=docsum&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Pubmed_DisplayBar.FSort2=&email_format2=docsum&email_sort2=&email_count2=20&email_start2=1&email_address2=&email_subj2=bone+fracture+-+PubMed&email_add_text2=&EmailCheck1=&EmailCheck2=&coll_start2=1&citman_count2=20&citman_start2=1&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.EmailReport=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.EmailFormat=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.EmailCount=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.EmailStart=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.EmailSort=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.Email=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.EmailSubject=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.EmailText=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.EmailQueryKey=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.EmailHID=1JUaNZm7_muMenLr1UCg7qnKsykz3SEoWOFpZKTJpg1OPsm8DTZY4SFI2IPzWw7ap95YjxnHe5u1jGZfR_IvM4TVVA2azjhpkrl&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.QueryDescription=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.Key=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.Answer=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.Holding=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.HoldingFft=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.HoldingNdiSet=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.OToolValue=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.EmailTab.SubjectList=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.TimelineAdPlaceHolder.CurrTimelineYear=&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.TimelineAdPlaceHolder.BlobID=NCID_1_330998348_130.14.18.34_9001_1459126857_1489724809_0MetA0_S_MegaStore_F_1&EntrezSystem2.PEntrez.DbConnector.Db=pubmed&EntrezSystem2.PEntrez.DbConnector.LastDb=pubmed&EntrezSystem2.PEntrez.DbConnector.Term=bone+fracture&EntrezSystem2.PEntrez.DbConnector.LastTabCmd=&EntrezSystem2.PEntrez.DbConnector.LastQueryKey=1&EntrezSystem2.PEntrez.DbConnector.IdsFromResult=&EntrezSystem2.PEntrez.DbConnector.LastIdsFromResult=&EntrezSystem2.PEntrez.DbConnector.LinkName=&EntrezSystem2.PEntrez.DbConnector.LinkReadableName=&EntrezSystem2.PEntrez.DbConnector.LinkSrcDb=&EntrezSystem2.PEntrez.DbConnector.Cmd=PageChanged&EntrezSystem2.PEntrez.DbConnector.TabCmd=&EntrezSystem2.PEntrez.DbConnector.QueryKey=&p%24a=EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Entrez_Pager.Page&p%24l=EntrezSystem2&p%24st=pubmed&EntrezSystem2.PEntrez.PubMed.Pubmed_ResultsPanel.Entrez_Pager.CurrPage=1"

print(kw_url)

r = requests.post(kw_url, headers=heads)

soup = BeautifulSoup(r.content.decode('gbk', 'ignore'))

#print(soup)

pagitation = soup.find('input', id="pageno")['last']

print('共有页面数：' + pagitation)