批量论文自动下载——从dblp数据库中查找并爬取论文

• • 前言
  • 原有爬取脚本
  • 修正后的爬取脚本

个人需要爬取一些论文资料，所以根据CSDN上已有的代码进行修改，完成了一个可以根据dblp检索结果爬取论文的脚本。arxiv.py是爬取检索结果中下载链接给的是arxiv开源链接的论文。ICML.py是爬取检索结果中下载链接给的是PMLR链接的论文。

最初的爬取脚本，转载自博客：https://blog.csdn.net/weixin_42781851/article/details/89086048

import urllib.request
import re
import os

req = urllib.request.Request('https://dblp.uni-trier.de/search?q=Reinforcement%20Learning%20Decision')
response = urllib.request.urlopen(req)
the_page = response.read().decode('utf-8')

paper_title = re.findall('(.*?)',the_page,re.S)
paper_web = re.findall('view
',the_page,re.S)

def get_pdf_arxiv(web_site,path):
    rep = urllib.request.urlopen(urllib.request.Request(web_site))
    page = rep.read().decode('utf-8')
    pdf_download = re.findall('',page,re.S)
    print(pdf_download[0])
    if (len(pdf_download) != 0):
        try:
            u = urllib.request.urlopen(pdf_download[0])
        except urllib.error.HTTPError:
            print(pdf_download[0], "url file not found")
            return
        block_sz = 8192
        with open(path, 'wb') as f:
            while True:
                buffer = u.read(block_sz)
                if buffer:
                    f.write(buffer)
                else:
                    break
        print("Sucessful to download " + path)

for i in range(len(paper_web)):
    if (paper_web[i].find("arxiv") != -1):

        list = paper_title[i].split(" ")
        paper_title[i] = "_".join(list)
        list = paper_title[i].split(":")
        paper_title[i] = "_".join(list)

        print(paper_title[i])
        path_dir = "C:\Users\xxxx\Desktop\desktoppaper\RL_Decision\"
        dir_list=os.listdir(path_dir)
        path = paper_title[i] + "pdf"
        if path not in dir_list:
            get_pdf_arxiv(paper_web[i], path_dir + path)

非常感谢这位博主提供的爬取思路，但是在使用的过程中，出现了如下问题：
1.dblp的页面有了一些变化，爬取会报错。
2.dblp采取了懒加载的策略，直接访问查询路径只能爬取最多30条数据。

以下arxiv.py和上面原爬取脚本功能相似，并解决了懒加载的问题。将原有url改为dblp懒加载查询的url，并自增查询的页数b即可。可以根据查询的结果条数/30，来估计页数b的最大值。并且有些论文不是arxiv链接，则无法下载。

arxiv.py

import urllib.request
import re
import os

def get_pdf_arxiv(web_site,path):
    rep = urllib.request.urlopen(urllib.request.Request(web_site))
    page = rep.read().decode('utf-8')
    pdf_download = re.findall('',page,re.S)#查询到网页中对应的pdf下载链接
    print(pdf_download[0])
    if (len(pdf_download) != 0):
        try:
            u = urllib.request.urlopen(pdf_download[0])
        except urllib.error.HTTPError:
            print(pdf_download[0], "url file not found")
            return
        block_sz = 8192
        with open(path, 'wb') as f:
            while True:
                buffer = u.read(block_sz)
                if buffer:
                    f.write(buffer)
                else:
                    break
        print("Sucessful to download " + path)


for j in range(10):
    req = urllib.request.Request('https://dblp.uni-trier.de/search//publ/inc?q=Offline%20Reinforcement%20Learning&s=ydvspc&h=30&b='+str(j))#此处只需要修改q=后面的内容，并且保留&s=ydvspc之后的内容
    response = urllib.request.urlopen(req)
    the_page = response.read().decode('utf-8')

    paper_title = re.findall('(.*?)',the_page,re.S)#检索页面中给的论文名字
    paper_web = re.findall('view
',the_page,re.S)#存储对应网址
    for i in range(len(paper_web)):
        if (paper_web[i].find("arxiv") != -1): #查看网址中是否包含arxiv词汇
            #以下代码去除了原有网页论文名字中无法保存为window文件名的符号，采用下划线_代替
            paper_title[i] = paper_title[i].replace('"', '')
            list = paper_title[i].split(" ")
            paper_title[i] = "_".join(list)
            list = paper_title[i].split(":")
            paper_title[i] = "_".join(list)
            list = paper_title[i].split("?")
            paper_title[i] = "_".join(list)
            list = paper_title[i].split("")
            paper_title[i] = "_".join(list)
            list = paper_title[i].split("")
            paper_title[i] = "_".join(list)
            list = paper_title[i].split("")
            paper_title[i] = "_".join(list)
            list = paper_title[i].split("")
            paper_title[i] = "_".join(list)

            print(paper_title[i])
            path_dir = "E:\paper\offlineRL paper\"
            dir_list=os.listdir(path_dir)
            path = paper_title[i] + "pdf"
            if path not in dir_list:
                get_pdf_arxiv(paper_web[i], path_dir + path)

除此以外，我个人还想下一些ICML的论文，所以对于上面的代码进行了微调，将下载地址中需要包含arxiv改为需要包含proceedings，并且根据ICML的网页特性，找到了下载pdf的链接，完整代码在如下ICML.py中。

ICML.py

import urllib.request
import re
import os

def get_pdf_arxiv(web_site,path):
    print(web_site,path)
    rep = urllib.request.urlopen(urllib.request.Request(web_site))
    page = rep.read().decode('utf-8')
    # pdf_download = re.findall('',page,re.S)
    pdf_download= re.findall('
Download PDF
',page,re.S)
    download = re.findall('http://(.*?).pdf',str(pdf_download[0]),re.S)
    download_url = "http://"+download[0]+".pdf"
    if (len(pdf_download) != 0):
        try:
            u = urllib.request.urlopen(download_url)
        except urllib.error.HTTPError:
            print(download_url, "url file not found")
            return
        block_sz = 8192
        with open(path, 'wb') as f:
            while True:
                buffer = u.read(block_sz)
                if buffer:
                    f.write(buffer)
                else:
                    break
        print("Sucessful to download " + path)

for j in range(100):
    req = urllib.request.Request('https://dblp.uni-trier.de/search//publ/inc?q=ICML&s=ydvspc&h=30&b='+str(j))
    response = urllib.request.urlopen(req)
    the_page = response.read().decode('utf-8')

    paper_title = re.findall('(.*?)',the_page,re.S)
    paper_web = re.findall('view
',the_page,re.S)
    for i in range(len(paper_web)):
        # if (paper_web[i].find("arxiv") != -1):
        if (paper_web[i].find("proceedings") != -1):
            paper_title[i] = paper_title[i].replace('"', '')
            list = paper_title[i].split(" ")
            paper_title[i] = "_".join(list)
            list = paper_title[i].split(":")
            paper_title[i] = "_".join(list)
            list = paper_title[i].split("?")
            paper_title[i] = "_".join(list)
            list = paper_title[i].split("")
            paper_title[i] = "_".join(list)
            list = paper_title[i].split("")
            paper_title[i] = "_".join(list)
            list = paper_title[i].split("")
            paper_title[i] = "_".join(list)
            list = paper_title[i].split("")
            paper_title[i] = "_".join(list)

            print(paper_title[i])
            path_dir = "E:\paper\ICML paper\"
            dir_list=os.listdir(path_dir)
            path = paper_title[i] + "pdf"
            if path not in dir_list:
                get_pdf_arxiv(paper_web[i], path_dir + path)