如何在python中使用pdf2image将pdf从url转换为图像？

Question

我可以使用 pdf2image convert_to_path 将驱动器中的 pdf 文件转换为图像，但是当我尝试对 pdf 'https://example.com/abc.pdf' 进行相同操作时，会出现多个错误。

代码：

url = 'https://example.com/abc.pdf'
scrape = urlopen(url)  # for external files
pil_images = pdf2image.convert_from_bytes(scrape.read(), dpi=200, 
             output_folder=None, first_page=None, last_page=None,
             thread_count=1, userpw=None,use_cropbox=False, strict=False,
             poppler_path=r"C:\poppler-0.68.0_x86\poppler-0.68.0\bin",)

错误：

   Unable to get page count. Syntax Error: Document stream is empty

也关注了下面的链接，但没有运气

Python3: Download PDF to memory and convert first page to image

身份验证屏幕截图：

Answer 1

首先按照此博客中的说明从 URL 下载 pdf。 https://dzone.com/articles/simple-examples-of-downloading-files-using-python

如果您的 pdf 中有多个页面，请使用此将 pdf 转换为图像或任何其他系列格式。

import ghostscript

def pdf2jpeg(pdf_input_path, jpeg_output_path):
    args = ["pdf2jpeg", # actual value doesn't matter
            "-dNOPAUSE",
            "-sDEVICE=jpeg",
            "-r144",
            "-sOutputFile=" + jpeg_output_path,
            pdf_input_path]
    ghostscript.Ghostscript(*args)

参考：Converting a PDF to a series of images with Python

对于身份验证，试试这个。

import os
import requests

from urlparse import urlparse

username = 'foo'
password = 'sekret'

url = 'http://example.com/blueberry/download/somefile.jpg'
filename = os.path.basename(urlparse(url).path)

r = requests.get(url, auth=(username,password))

if r.status_code == 200:
   with open(filename, 'wb') as out:
      for bits in r.iter_content():
          out.write(bits)

参考：Download a file providing username and password using Python