250 lines
8.6 KiB
Python
250 lines
8.6 KiB
Python
"""
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Fetches papers.
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"""
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import re
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import os
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import json
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import random
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import requests
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import lxml.etree
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from StringIO import StringIO
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def download(phenny, input, verbose=True):
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"""
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Downloads a paper.
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"""
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# only accept requests in a channel
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if not input.sender.startswith('#'):
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# unless the user is an admin, of course
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if not input.admin:
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phenny.say("i only take requests in the ##hplusroadmap channel.")
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return
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else:
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# just give a warning message to the admin.. not a big deal.
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phenny.say("okay i'll try, but please send me requests in ##hplusroadmap in the future.")
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# get the input
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line = input.group()
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# was this an explicit command?
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explicit = False
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if line.startswith(phenny.nick):
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explicit = True
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line = line[len(phenny.nick):]
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if line.startswith(",") or line.startswith(":"):
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line = line[1:]
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if line.startswith(" "):
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line = line.strip()
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# don't bother if there's nothing there
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if len(line) < 5 or (not "http://" in line and not "https://" in line) or not line.startswith("http"):
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return
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for line in re.findall('http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+', line):
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line = filter_fix(line)
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translation_url = "http://localhost:1969/web"
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headers = {
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"Content-Type": "application/json",
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}
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data = {
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"url": line,
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"sessionid": "what"
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}
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data = json.dumps(data)
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response = requests.post(translation_url, data=data, headers=headers)
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if response.status_code == 200:
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# see if there are any attachments
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content = json.loads(response.content)
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item = content[0]
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title = item["title"]
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if item.has_key("attachments"):
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pdf_url = None
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for attachment in item["attachments"]:
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if attachment.has_key("mimeType") and "application/pdf" in attachment["mimeType"]:
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pdf_url = attachment["url"]
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break
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if pdf_url:
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user_agent = "Mozilla/5.0 (X11; Linux i686 (x86_64)) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11"
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headers = {
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"User-Agent": user_agent,
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}
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response = None
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if pdf_url.startswith("https://"):
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response = requests.get(pdf_url, headers=headers, verify=False)
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else:
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response = requests.get(pdf_url, headers=headers)
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# detect failure
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if response.status_code == 401:
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phenny.say("HTTP 401 unauthorized " + str(pdf_url))
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continue
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elif response.status_code != 200:
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phenny.say("HTTP " + str(response.status_code) + " " + str(pdf_url))
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continue
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data = response.content
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# grr..
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title = title.encode("ascii", "ignore")
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path = os.path.join("/home/bryan/public_html/papers2/paperbot/", title + ".pdf")
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file_handler = open(path, "w")
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file_handler.write(data)
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file_handler.close()
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filename = requests.utils.quote(title)
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url = "http://diyhpl.us/~bryan/papers2/paperbot/" + filename + ".pdf"
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phenny.say(url)
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continue
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elif verbose and explicit:
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phenny.say(download_url(line))
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continue
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elif verbose and explicit:
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phenny.say(download_url(line))
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continue
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elif verbose and explicit:
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if response.status_code == 501:
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if verbose:
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phenny.say("no translator available, raw dump: " + download_url(line))
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continue
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else:
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if verbose:
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phenny.say("error: HTTP " + str(response.status_code) + " " + download_url(line))
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continue
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else:
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continue
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return
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download.commands = ["fetch", "get", "download"]
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download.priority = "high"
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download.rule = r'(.*)'
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def download_ieee(url):
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"""
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Downloads an IEEE paper. The Zotero translator requires frames/windows to
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be available. Eventually translation-server will be fixed, but until then
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it might be nice to have an IEEE workaround.
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"""
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# url = "http://ieeexplore.ieee.org:80/xpl/freeabs_all.jsp?reload=true&arnumber=901261"
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# url = "http://ieeexplore.ieee.org/iel5/27/19498/00901261.pdf?arnumber=901261"
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raise NotImplementedError
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def download_url(url):
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response = requests.get(url, headers={"User-Agent": "origami-pdf"})
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content = response.content
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# just make up a default filename
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title = "%0.2x" % random.getrandbits(128)
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# default extension
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extension = ".txt"
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if "pdf" in response.headers["content-type"]:
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extension = ".pdf"
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elif check_if_html(response):
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# parse the html string with lxml.etree
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tree = parse_html(content)
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# extract some metadata with xpaths
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citation_pdf_url = find_citation_pdf_url(tree, url)
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citation_title = find_citation_title(tree)
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if citation_pdf_url and citation_title:
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citation_title = citation_title.encode("ascii", "ignore")
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response = requests.get(citation_pdf_url, headers={"User-Agent": "pdf-defense-force"})
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content = response.content
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if "pdf" in response.headers["content-type"]:
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extension = ".pdf"
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title = citation_title
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else:
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if "sciencedirect.com" in url:
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title = tree.xpath("//h1[@class='svTitle']")[0].text
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pdf_url = tree.xpath("//a[@id='pdfLink']/@href")[0]
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elif "h1 class=\"articleTitle" in content:
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try:
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title = tree.xpath("//h1[@class='articleTitle']")[0].text
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title = title.encode("ascii", "ignore")
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pdf_url = tree.xpath("//a[@title='View the Full Text PDF']/@href")[0]
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except:
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pass
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else:
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if pdf_url.startswith("/"):
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url_start = url[:url.find("/",8)]
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pdf_url = url_start + pdf_url
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response = requests.get(pdf_url, headers={"User-Agent": "pdf-teapot"})
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content = response.content
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if "pdf" in response.headers["content-type"]:
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extension = ".pdf"
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# raise Exception("problem with citation_pdf_url or citation_title")
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# well, at least save the contents from the original url
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pass
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path = os.path.join("/home/bryan/public_html/papers2/paperbot/", title + extension)
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file_handler = open(path, "w")
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file_handler.write(content)
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file_handler.close()
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url = "http://diyhpl.us/~bryan/papers2/paperbot/" + requests.utils.quote(title) + extension
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return url
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def parse_html(content):
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if not isinstance(content, StringIO):
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content = StringIO(content)
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parser = lxml.etree.HTMLParser()
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tree = lxml.etree.parse(content, parser)
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return tree
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def check_if_html(response):
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return "text/html" in response.headers["content-type"]
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def find_citation_pdf_url(tree, url):
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"""
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Returns the <meta name="citation_pdf_url"> content attribute.
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"""
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citation_pdf_url = extract_meta_content(tree, "citation_pdf_url")
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if citation_pdf_url and not citation_pdf_url.startswith("http"):
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if citation_pdf_url.startswith("/"):
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url_start = url[:url.find("/",8)]
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citation_pdf_url = url_start + citation_pdf_url
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else:
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raise Exception("unhandled situation (citation_pdf_url)")
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return citation_pdf_url
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def find_citation_title(tree):
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"""
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Returns the <meta name="citation_title"> content attribute.
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"""
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citation_title = extract_meta_content(tree, "citation_title")
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return citation_title
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def extract_meta_content(tree, meta_name):
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try:
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content = tree.xpath("//meta[@name='" + meta_name + "']/@content")[0]
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except:
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return None
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else:
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return content
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def filter_fix(url):
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"""
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Fixes some common problems in urls.
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"""
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if ".proxy.lib.pdx.edu" in url:
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url = url.replace(".proxy.lib.pdx.edu", "")
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return url
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