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| -rw-r--r-- | Doc/library/cgi.rst | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/Doc/library/cgi.rst b/Doc/library/cgi.rst index 1e2498d..21509d1 100644 --- a/Doc/library/cgi.rst +++ b/Doc/library/cgi.rst @@ -86,11 +86,14 @@ produced by :mod:`cgitb` provide information that can save you a lot of time in tracking down bugs. You can always remove the ``cgitb`` line later when you have tested your script and are confident that it works correctly. -To get at submitted form data, use the :class:`FieldStorage` class. Instantiate -it exactly once, without arguments. This reads the form contents from standard -input or the environment (depending on the value of various environment -variables set according to the CGI standard). Since it may consume standard -input, it should be instantiated only once. +To get at submitted form data, use the :class:`FieldStorage` class. If the form +contains non-ASCII characters, use the *encoding* keyword parameter set to the +value of the encoding defined for the document. It is usually contained in the +META tag in the HEAD section of the HTML document or by the +:mailheader:`Content-Type` header). This reads the form contents from the +standard input or the environment (depending on the value of various +environment variables set according to the CGI standard). Since it may consume +standard input, it should be instantiated only once. The :class:`FieldStorage` instance can be indexed like a Python dictionary. It allows membership testing with the :keyword:`in` operator, and also supports @@ -136,10 +139,10 @@ commas:: If a field represents an uploaded file, accessing the value via the :attr:`value` attribute or the :func:`getvalue` method reads the entire file in -memory as a string. This may not be what you want. You can test for an uploaded +memory as bytes. This may not be what you want. You can test for an uploaded file by testing either the :attr:`filename` attribute or the :attr:`!file` attribute. You can then read the data at leisure from the :attr:`!file` -attribute:: +attribute (the :func:`read` and :func:`readline` methods will return bytes):: fileitem = form["userfile"] if fileitem.file: |