详细的说明万方数据库，文献下载的准备

终于根据爬虫获取 js 动态数据 （万方数据库文献下载） 一文提示，我提取出了动态的url

获取下载的链接的url

def getdownurl(url):
    text=get_html(url).text
    re0=r'<a onclick="upload\((.*?)\)"'
    firurl=re.findall(re0,text)
    print(firurl)
    if len(firurl)==0:
        return
    strurl=str(firurl[0])
    print(strurl)
    tpurl=re.split(',',strurl)
    endstp=[]
    #print(tpurl)
    for ul in tpurl:
        elem=ul.strip('\'').strip('\'')
        endstp.append(elem)
    print(endstp,type(endstp[0]))
    head='http://www.wanfangdata.com.cn/search/downLoad.do?page_cnt='
    geturl=head+endstp[0]+"&language="+endstp[2]+"&resourceType="+endstp[6]+"&source="+endstp[3]+ "&resourceId="+endstp[1]+"&resourceTitle="+endstp[4]+"&isoa="+endstp[5]+"&type="+endstp[0]
    print(geturl)
    re1=r'<iframe style="display:none" id="downloadIframe" src="(.*?)">'
    text=get_html(geturl).text
    print()
    sucurl=re.findall(re1,text)
    print(sucurl)
    return sucurl[0]

下载所有的ＰＤＦ文件

def downloadAllPdf(key):
    row=getNum(key)
    pages=search_key(key)
    allurl=[]
    num=0
    for page in  pages:
        allurl=get_url(page)
        for url in allurl:
            #得到每一篇文献的信息，写入文件
            num+=1
            try:
                re0=r'<title>(.*?)</title>'
                text=get_html(url).text
                title=re.findall(re0,text)[0]
                print("下载：",title)
                geturl=getdownurl(url)
                get_pdf(geturl,title)
            except:
               print("has except")
               continue
            finally:
               print("all downloads is",num)

完整的文章如下

import requests
import time
import re
import os
from bs4 import BeautifulSoup
import bs4
from urllib import parse
from multiprocessing import Pool
import xlwt

def get_html(url):
    try:
          header ={'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.90 Safari/537.36 2345Explorer/9.3.2.17331', }
          r=requests.get(url,headers = header,verify=False)
          r.raise_for_status
          r.encoding=r.apparent_encoding
          #print(r.text)
          return r
    except Exception as e:
        print("has error:"+str(e))
        
def getNum(key):
    head="http://www.wanfangdata.com.cn/search/searchList.do?searchType=all&showType=&searchWord="
    end="&isTriggerTag="
    url=head+key+end
    re1=r'\s*找到<strong>(.*?)</strong>条结果'
    html=get_html(url).text
    if html==None:
        print("没有文献")
        return ;
    strnum=re.findall(re1,html)
    num=int(strnum[0])
    #print("找到了：",num)
    return num;
    
        
def search_key(key):
    allurl=[]
    page=0
    head="http://www.wanfangdata.com.cn/search/searchList.do?searchType=all&showType=&searchWord="
    end="&isTriggerTag="
    url=head+key+end
    #print(url)
    allurl.append(url)
    html=get_html(url).text
    if html==None:
        print("text empty")
        return ;
    num=getNum(key)
    print("找到了：",num)
    if num>20:
        if(num%20!=0):
            page=num//20+1
        else:
            page=num//20
    # page>1 url
    head='http://www.wanfangdata.com.cn/search/searchList.do?searchType=all&pageSize=20&page='
    end='&searchWord='+key+'&order=correlation&showType=detail&isCheck=check&isHit=&isHitUnit=&firstAuthor=false&rangeParame=all'
    for i in range(2,page+1):
        url=head+str(i)+end
        allurl.append(url)
    l=len(allurl)
    print('第',l,"页")
    print(allurl[0])
    print(allurl[l-1])
    return allurl

  def get_url(urls):
    base='http://www.wanfangdata.com.cn//link.do'
    html=get_html(urls).text
    #re0=r'<a href="(.*?)">'
    re0=r'<a\b[^>]*\bhref="/link.do?([^"]+)'
    allUrl=re.findall(re0,html)
    length=len(allUrl)
    print("length=",length)
    for i in range(length):
        allUrl[i]=base+allUrl[i]
    #print(allUrl)
    return allUrl

def getdownurl(url):
    text=get_html(url).text
    re0=r'<a onclick="upload\((.*?)\)"'
    firurl=re.findall(re0,text)
    print(firurl)
    if len(firurl)==0:
        return
    strurl=str(firurl[0])
    print(strurl)
    tpurl=re.split(',',strurl)
    endstp=[]
    #print(tpurl)
    for ul in tpurl:
        elem=ul.strip('\'').strip('\'')
        endstp.append(elem)
    print(endstp,type(endstp[0]))
    head='http://www.wanfangdata.com.cn/search/downLoad.do?page_cnt='
    geturl=head+endstp[0]+"&language="+endstp[2]+"&resourceType="+endstp[6]+"&source="+endstp[3]+ "&resourceId="+endstp[1]+"&resourceTitle="+endstp[4]+"&isoa="+endstp[5]+"&type="+endstp[0]
    print(geturl)
    re1=r'<iframe style="display:none" id="downloadIframe" src="(.*?)">'
    text=get_html(geturl).text
    print()
    sucurl=re.findall(re1,text)
    print(sucurl)
    return sucurl[0]

    
def get_pdf(url,title):
    text=get_html(url)
    path="/home/dflx/下载/万方数据库/深度学习/"+title+".pdf"
    with open(path,'wb') as f:
        f.write(text.content)
    print("successf")    
    
    
def downloadAllPdf(key):
    #row=getNum(key)
    pages=search_key(key)
    allurl=[]
    num=0
    for page in  pages:
        allurl=get_url(page)
        for url in allurl:
            #得到每一篇文献的信息，写入文件
            num+=1
            try:
                re0=r'<title>(.*?)</title>'
                text=get_html(url).text
                title=re.findall(re0,text)[0]
                print("下载：",title)
                geturl=getdownurl(url)
                get_pdf(geturl,title)
            except:
               print("has except")
               continue
            finally:
               print("all downloads is",num)
    
           
def main():
    #自己输入关键字，检索
    key='深度学习'
    downloadAllPdf(key)
    

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