Question

我正在尝试创建类似代理（在PYTHON中）下载并且我收到错误。我想强制用户下载文件，而是在屏幕上打印（二进制代码）。这是我的代码：我正在做的是......从另一台服务器下载文件，同时尝试将此文件发送给客户端。所以是这样的：REMOTE_SERVER - ＆gt; MY_SERVER - ＆gt; CLIENT，无需将文件保存在我的服务器中。有人能帮助我做错了吗？

myfile = session.get(r.headers['location'], stream = True)
print "Content-Type: application/zip\r\n"
print "Prama: no-cache\r\n"
print "Expires: 0\r\n"
print "Cache-Control: must-revalidate, post-check=0, pre-check=0\r\n"
print "Content-Type: application/octet-stream\r\n"
print "Content-Type: application/download\r\n"
print "Content-Disposition: attachment; filename=ternos.205.zip\r\n"
print "Content-Transfer-Encoding: binary\r\n"
print "Content-Length: 144303765\r\n"

#print "Accept-Ranges: bytes\r\n"
print ("\r\n\r\n")
#with open('suits.zip', 'wb') as f:
for chunk in myfile.iter_content(chunk_size=1024):
    if chunk:
        sys.stdout.write(chunk)
        sys.stdout.flush()

似乎与标题无关，因为我已尝试过数百万个不同的标题..强制下载等等......但没有任何反应......

Answer 1

print 已经在输出中包含换行符。请改用sys.stdout，并仅写入一个 Content-Type标头。在标题之后，只写一个更多\r\n组合。

import sys

# ...
sys.stdout.write("Content-Type: application/zip\r\n")
sys.stdout.write("Prama: no-cache\r\n")
sys.stdout.write("Expires: 0\r\n")
sys.stdout.write("Cache-Control: must-revalidate, post-check=0, pre-check=0\r\n")
sys.stdout.write("Content-Type: application/octet-stream\r\n")
sys.stdout.write("Content-Disposition: attachment; filename=ternos.205.zip\r\n")
sys.stdout.write("Content-Transfer-Encoding: binary\r\n")
sys.stdout.write("Content-Length: 144303765\r\n")
sys.stdout.write("\r\n")

大多数CGI实现实际上会为您定期\n转换为\r\n，因此您可以只打印标题而无需添加分隔符：< / p>

print "Content-Type: application/zip"
print "Prama: no-cache"
print "Expires: 0"
print "Cache-Control: must-revalidate, post-check=0, pre-check=0"
print "Content-Type: application/octet-stream"
print "Content-Disposition: attachment; filename=ternos.205.zip"
print "Content-Transfer-Encoding: binary"
print "Content-Length: 144303765"
print

为了然后流式传输代理请求，我使用.raw文件对象并将sys.stdout传递给import shutil shutil.copyfileobj(myfile.raw, sys.stdout)：

stdout

我怀疑是否需要刷新，如果Python退出该点并且在关闭时刷新{{1}}。

如何强制下载到客户端..正在浏览器上打印

1 个答案: