「IO錯誤：[錯誤FTP錯誤] 200類型設置爲我」，從源頭

Question

安裝LXML時，這是我的錯誤：

C:\WINDOWS\system32>pip install scrapy --upgrade 

Requirement already up-to-date: scrapy in c:\python27\lib\site-packages\scrapy-1.2.0-py2.7.egg 
Requirement already up-to-date: Twisted>=10.0.0 in c:\python27\lib\site-packages (from scrapy) 
Requirement already up-to-date: w3lib>=1.15.0 in c:\python27\lib\site-packages (from scrapy) 
Requirement already up-to-date: queuelib in c:\python27\lib\site-packages (from scrapy) 

Collecting lxml (from scrapy) 

    Using cached lxml-3.6.4.tar.gz 

    Complete output from command python setup.py egg_info: 
    Building lxml version 3.6.4. 
    Retrieving "ftp://ftp.zlatkovic.com/pub/libxml/libxslt-1.1.26.win32.zip" to "libs\libxslt-1.1.26.win32.zip" 
    Traceback (most recent call last): 
     File "<string>", line 1, in <module> 
     File "c:\users\thezm\appdata\local\temp\pip-build-y3m3fl\lxml\setup.py", line 233, in <module> 
     **setup_extra_options() 
     File "c:\users\thezm\appdata\local\temp\pip-build-y3m3fl\lxml\setup.py", line 144, in setup_extra_options 
     STATIC_CFLAGS, STATIC_BINARIES) 
     File "setupinfo.py", line 55, in ext_modules 
     OPTION_DOWNLOAD_DIR, static_include_dirs, static_library_dirs) 
     File "buildlibxml.py", line 95, in get_prebuilt_libxml2xslt 
     libs = download_and_extract_zlatkovic_binaries(download_dir) 
     File "buildlibxml.py", line 55, in download_and_extract_zlatkovic_binaries 
     urlretrieve(srcfile, destfile) 
     File "c:\python27\lib\urllib.py", line 98, in urlretrieve 
     return opener.retrieve(url, filename, reporthook, data) 
     File "c:\python27\lib\urllib.py", line 245, in retrieve 
     fp = self.open(url, data) 
     File "c:\python27\lib\urllib.py", line 213, in open 
     return getattr(self, name)(url) 
     File "c:\python27\lib\urllib.py", line 558, in open_ftp 
     (fp, retrlen) = self.ftpcache[key].retrfile(file, type) 
     File "c:\python27\lib\urllib.py", line 906, in retrfile 
     conn, retrlen = self.ftp.ntransfercmd(cmd) 
     File "c:\python27\lib\ftplib.py", line 334, in ntransfercmd 
     host, port = self.makepasv() 
     File "c:\python27\lib\ftplib.py", line 312, in makepasv 
     host, port = parse227(self.sendcmd('PASV')) 
     File "c:\python27\lib\ftplib.py", line 830, in parse227 
     raise error_reply, resp 
    IOError: [Errno ftp error] 200 Type set to I 

    ---------------------------------------- 
Command "python setup.py egg_info" failed with error code 1 in c:\users\thezm\appdata\local\temp\pip-build-y3m3fl\lxml\ 

如何解決呢？

Answer 1

這是由於a bug in ftplib and/or urllib：FTP響應226被忽略，導致客戶端錯誤地將進一步的傳入響應與傳出命令進行匹配。

我做了一些挖掘，並得出結論，urllib不能完全固定與ftplib，因爲它現在。您可以使用下面的補丁urllib.py雖然（DIFF的是Python的2.7.12）來解決這個特定問題：

--- a/urllib.py Sat Jun 25 22:46:20 2016 
+++ b/urllib.py Sat Dec 10 00:20:48 2016 
@@ -927,7 +927,7 @@ 
     self.busy = 1 
     ftpobj = addclosehook(conn.makefile('rb'), self.file_close) 
     self.refcount += 1 
-  conn.close() 
+  #conn.close() 
     # Pass back both a suitably decorated object and a retrieval length 
     return (ftpobj, retrlen) 

@@ -940,7 +940,14 @@ 
      self.real_close() 

    def file_close(self): 
+  import ftplib 
     self.endtransfer() 
+  #Process the 226 transfer complete response 
+  try: 
+   self.ftp.voidresp() 
+  except ftplib.error_temp as msg: 
+   # transfer is aborted by urllib when some other exception has happened 
+   if msg.args[0][:3] != '426': raise 
     self.refcount -= 1 
     if self.refcount <= 0 and not self.keepalive: 
      self.real_close() 
@@ -990,15 +997,13 @@ 
     self.hookargs = hookargs 

    def close(self): 
-  try: 
-   closehook = self.closehook 
-   hookargs = self.hookargs 
-   if closehook: 
-    self.closehook = None 
-    self.hookargs = None 
-    closehook(*hookargs) 
-  finally: 
-   addbase.close(self) 
+  addbase.close(self) 
+  closehook = self.closehook 
+  hookargs = self.hookargs 
+  if closehook: 
+   self.closehook = None 
+   self.hookargs = None 
+   closehook(*hookargs) 


class addinfo(addbase):