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我有一箇舊的基於Python的Web窗體，我正在更新使用GPG進行加密，而不是不再支持的Python包。當通過命令行調用腳本時，它工作得很好，但是通過Web瀏覽器和CGI，出現錯誤：IOError：[Errno 32]損壞的管道。如果我使用gnupg軟件包，或者如果我嘗試通過子進程直接與gpg對話，則會發生此錯誤。Python的CGI腳本IOError斷開的管道
版本：
Python 2.4.1
gnupg 0.2.2 (python GPG wrapper)
Apache/2.2.9
gpg 1.4.9
下面是一個簡化的腳本：
#!/usr/bin/python
import sys
# send python tracebacks out to the web browser
sys.stderr = sys.stdout
import gnupg
gpg = gnupg.GPG()
gpgkey = 'np'
message = 'Our secret message!'
print "Content-type: text/html\r\n"
print '''<html><head><title>Test GPG access via cgi</title>
</head><body><pre>'''
print 'message in the clear:'
print message
encrypted = str(gpg.encrypt(message, 'np'))
print 'message encrypted:'
print encrypted
print '''</pre></body></html>'''sf
當上述腳本經由命令行調用，它運行得很好，但是當通過CGI調用它生成的以下錯誤：
message in the clear:
Our secret message!
Traceback (most recent call last):
File "/home/dkmaster/www/nickads/secure-cgi/gpgtest.py", line 23, in
encrypted = str(gpg.encrypt(message, 'np'))
File "/home/dkmaster/www/nickads/secure-cgi/gnupg.py", line 517, in encrypt
return self.encrypt_file(StringIO(data), recipients, **kwargs)
File "/home/dkmaster/www/nickads/secure-cgi/gnupg.py", line 467, in encrypt_file
self._handle_io(args, file, result, passphrase=passphrase)
File "/home/dkmaster/www/nickads/secure-cgi/gnupg.py", line 201, in _handle_io
_copy_data(file, stdin)
File "/home/dkmaster/www/nickads/secure-cgi/gnupg.py", line 75, in _copy_data
outstream.write(data)
IOError: [Errno 32] Broken pipe
我也試圖說服直接通過子，而不是GPG gnupg模塊。
#!/usr/bin/python
import sys
import subprocess
sys.stderr = sys.stdout
print "Content-type: text/html\r\n"
print '''<html><head><title>Test subprocess via cgi</title>
</head><body><pre>'''
plain_text = 'the quick fox ' * 10
print plain_text
gpgCommand = "/usr/bin/gpg --quiet -a -e -r 'np' "
gpgProcess = subprocess.Popen(
gpgCommand,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
shell=True
)
encrypted_text = gpgProcess.communicate(plain_text)[0]
print encrypted_text
同樣能正常工作的命令行，而不是通過CGI生成一個類似的錯誤：
Traceback (most recent call last):
File "/home/dkmaster/www/nickads/secure-cgi/subprocesstest.py", line 20, in
encrypted_text = gpgProcess.communicate(plain_text)[0]
File "/usr/lib/python2.5/subprocess.py", line 670, in communicate
return self._communicate(input)
File "/usr/lib/python2.5/subprocess.py", line 1220, in _communicate
bytes_written = self._write_no_intr(self.stdin.fileno(), buffer(input, input_offset, 512))
File "/usr/lib/python2.5/subprocess.py", line 999, in _write_no_intr
return os.write(fd, s)
OSError: [Errno 32] Broken pipe
那麼，如何解決在CGI管道？