使用 urllib2 从 URL 写入 PDF 文件

发布于 2024-10-31 15:33:10 字数 777 浏览 2 评论 0原文

我正在尝试使用 python 的模块 urllib2 保存从网络服务器生成的动态 pdf 文件。我使用以下代码从服务器获取数据并将该数据写入文件，以便将 pdf 存储在本地磁盘中：

import urllib2
import cookielib

theurl = 'https://myweb.com/?pdf&var1=1'
cj = cookielib.CookieJar()
opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
opener.addheaders.append(('Cookie', cookie))
request = urllib2.Request(theurl)

print("... Sending HTTP GET to %s" % theurl)
f = opener.open(request)
data = f.read()
f.close()
opener.close()

FILE = open('report.pdf', "w")
FILE.write(data)
FILE.close()

此代码运行良好，但 adobe reader 无法很好地识别写入的 pdf 文件。如果我使用 Firefox 手动执行请求，我可以毫无问题地接收文件，并且可以毫无问题地可视化它。比较接收到的 http 标头（firefox 和 urrlib），唯一的区别是名为“Transfer-Encoding = chunked”的 http 标头字段。该字段在 Firefox 中收到，但当我执行 urllib 请求时似乎没有收到该字段。有什么建议吗？

原文

I'm trying to save a dynamic pdf file generated from a web server using python's module urllib2.
I use following code to get data from server and to write that data to a file in order to store the pdf in a local disk.:

import urllib2
import cookielib

theurl = 'https://myweb.com/?pdf&var1=1'
cj = cookielib.CookieJar()
opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
opener.addheaders.append(('Cookie', cookie))
request = urllib2.Request(theurl)

print("... Sending HTTP GET to %s" % theurl)
f = opener.open(request)
data = f.read()
f.close()
opener.close()

FILE = open('report.pdf', "w")
FILE.write(data)
FILE.close()

This code runs well but the written pdf file is not well recognized by adobe reader. If I do the request manually using firefox, I have no problems to receive the file and I can visualize it withouut problems.
Comparing the received http headers (firefox and urrlib) the only difference is a http header field called "Transfer-Encoding = chunked". This field is received in firefox but it seems that is not received when I do the urllib request.
Any suggestion?

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