Question

我正在尝试解析此文件，但不从网站下载。我已经在我的硬盘驱动器上运行了这个文件，我可以毫无问题地解析它，但运行此脚本它会跳闸。

if not document.is_extractable:
raise PDFTextExtractionNotAllowed

我认为我正在整合网址错误。

import sys
import getopt
import urllib2
import datetime
import re
from pdfminer.pdfparser import PDFParser
from pdfminer.converter import XMLConverter, HTMLConverter, TextConverter, PDFConverter, LTContainer, LTText, LTTextBox, LTImage
from pdfminer.layout import LAParams
from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter, process_pdf
from urllib2 import Request


# Define a PDF parser function
def parsePDF(url):

    # Open the url provided as an argument to the function and read the content
    open = urllib2.urlopen(Request(url)).read()

    # Cast to StringIO object
    from StringIO import StringIO
    memory_file = StringIO(open)

    # Create a PDF parser object associated with the StringIO object
    parser = PDFParser(memory_file)

    # Create a PDF document object that stores the document structure
    document = PDFDocument(parser)

    # Check if the document allows text extraction. If not, abort.
    if not document.is_extractable:
    raise PDFTextExtractionNotAllowed

     # Define parameters to the PDF device objet 
     rsrcmgr = PDFResourceManager()
     retstr = StringIO()
     laparams = LAParams()
     codec = 'utf-8'

     Create a PDF device object
     device = PDFDevice(rsrcmgr, retstr, codec = codec, laparams = laparams)
     # Create a PDF interpreter object
    interpreter = PDFPageInterpreter(rsrcmgr, device)

    # Process each page contained in the document
    for page in PDFPage.create_pages(document):
        interpreter.process_page(page)

# Construct the url
    url = 'http://www.city.pittsburgh.pa.us/police/blotter/blotter_monday.pdf'

Answer 1

根据您自己的答案和提供的函数here，这应该从网址中的pdf返回一个字符串而不下载它：

import urllib2
from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
from pdfminer.pdfpage import PDFPage
from cStringIO import StringIO


def pdf_from_url_to_txt(url):
    rsrcmgr = PDFResourceManager()
    retstr = StringIO()
    codec = 'utf-8'
    laparams = LAParams()
    device = TextConverter(rsrcmgr, retstr, codec=codec, laparams=laparams)
    # Open the url provided as an argument to the function and read the content
    f = urllib2.urlopen(urllib2.Request(url)).read()
    # Cast to StringIO object
    fp = StringIO(f)
    interpreter = PDFPageInterpreter(rsrcmgr, device)
    password = ""
    maxpages = 0
    caching = True
    pagenos = set()
    for page in PDFPage.get_pages(fp,
                                  pagenos,
                                  maxpages=maxpages,
                                  password=password,
                                  caching=caching,
                                  check_extractable=True):
        interpreter.process_page(page)
    fp.close()
    device.close()
    str = retstr.getvalue()
    retstr.close()
    return str

Answer 2

在上述答案的基础上，对我来说有点魅力，就像是魅力！这是我的函数版本：

def pdf_from_url_to_txt(url):
    rsrcmgr = PDFResourceManager()
    retstr = StringIO()
    codec = 'utf-8'
    laparams = LAParams()
    device = TextConverter(rsrcmgr, retstr, codec=codec, laparams=laparams)
    f = urllib.request.urlopen(url).read()
    fp = BytesIO(f)
    interpreter = PDFPageInterpreter(rsrcmgr, device)
    password = ""
    maxpages = 0
    caching = True
    pagenos = set()
    for page in PDFPage.get_pages(fp,
                                  pagenos,
                                  maxpages=maxpages,
                                  password=password,
                                  caching=caching,
                                  check_extractable=True):
        interpreter.process_page(page)
    fp.close()
    device.close()
    str = retstr.getvalue()
    retstr.close()
    return str

使用pdfminer通过URL解析PDF

2 个答案: