@cindex file names, restrict
@cindex Windows file names
-@item --restrict-file-names=@var{mode}
-Change which characters found in remote URLs may show up in local file
-names generated from those URLs. Characters that are @dfn{restricted}
+@item --restrict-file-names=@var{modes}
+Change which characters found in remote URLs must be escaped during
+generation of local filenames. Characters that are @dfn{restricted}
by this option are escaped, i.e. replaced with @samp{%HH}, where
@samp{HH} is the hexadecimal number that corresponds to the restricted
-character.
-
-By default, Wget escapes the characters that are not valid as part of
-file names on your operating system, as well as control characters that
-are typically unprintable. This option is useful for changing these
-defaults, either because you are downloading to a non-native partition,
-or because you want to disable escaping of the control characters.
-
-When mode is set to ``unix'', Wget escapes the character @samp{/} and
+character. This option may also be used to force all alphabetical
+cases to be either lower- or uppercase.
+
+By default, Wget escapes the characters that are not valid or safe as
+part of file names on your operating system, as well as control
+characters that are typically unprintable. This option is useful for
+changing these defaults, perhaps because you are downloading to a
+non-native partition, or because you want to disable escaping of the
+control characters, or you want to further restrict characters to only
+those in the @sc{ascii} range of values.
+
+The @var{modes} are a comma-separated set of text values. The
+acceptable values are @samp{unix}, @samp{windows}, @samp{nocontrol},
+@samp{ascii}, @samp{lowercase}, and @samp{uppercase}. The values
+@samp{unix} and @samp{windows} are mutually exclusive (one will
+override the other), as are @samp{lowercase} and
+@samp{uppercase}. Those last are special cases, as they do not change
+the set of characters that would be escaped, but rather force local
+file paths to be converted either to lower- or uppercase.
+
+When ``unix'' is specified, Wget escapes the character @samp{/} and
the control characters in the ranges 0--31 and 128--159. This is the
-default on Unix-like OS'es.
+default on Unix-like operating systems.
-When mode is set to ``windows'', Wget escapes the characters @samp{\},
+When ``windows'' is given, Wget escapes the characters @samp{\},
@samp{|}, @samp{/}, @samp{:}, @samp{?}, @samp{"}, @samp{*}, @samp{<},
@samp{>}, and the control characters in the ranges 0--31 and 128--159.
In addition to this, Wget in Windows mode uses @samp{+} instead of
saved as @samp{www.xemacs.org+4300/search.pl@@input=blah} in Windows
mode. This mode is the default on Windows.
-If you append @samp{,nocontrol} to the mode, as in
-@samp{unix,nocontrol}, escaping of the control characters is also
-switched off. You can use @samp{--restrict-file-names=nocontrol} to
-turn off escaping of control characters without affecting the choice of
-the OS to use as file name restriction mode.
+If you specify @samp{nocontrol}, then the escaping of the control
+characters is also switched off. This option may make sense
+when you are downloading URLs whose names contain UTF-8 characters, on
+a system which can save and display filenames in UTF-8 (some possible
+byte values used in UTF-8 byte sequences fall in the range of values
+designated by Wget as ``controls'').
+
+The @samp{ascii} mode is used to specify that any bytes whose values
+are outside the range of @sc{ascii} characters (that is, greater than
+127) shall be escaped. This can be useful when saving filenames
+whose encoding does not match the one used locally.
@cindex IPv6
@itemx -4
URLs that end in a slash), instead of @file{index.html}.
@cindex .html extension
+@cindex .css extension
@item -E
-@itemx --html-extension
+@itemx --adjust-extension
If a file of type @samp{application/xhtml+xml} or @samp{text/html} is
downloaded and the URL does not end with the regexp
@samp{\.[Hh][Tt][Mm][Ll]?}, this option will cause the suffix @samp{.html}
Retrieval Options}).
As of version 1.12, Wget will also ensure that any downloaded files of
-type @samp{text/css} end in the suffix @samp{.css}. Obviously, this
-makes the name @samp{--html-extension} misleading; a better name is
-expected to be offered as an alternative in the near future.
+type @samp{text/css} end in the suffix @samp{.css}, and the option was
+renamed from @samp{--html-extension}, to better reflect its new
+behavior. The old option name is still acceptable, but should now be
+considered deprecated.
+
+At some point in the future, this option may well be expanded to
+include suffixes for other types of content, including content types
+that are not parsed by Wget.
@cindex http user
@cindex http password
If the local file already exists and @samp{--no-directories} was
specified, a numeric suffix will be appended to the original name.
@item
-If @samp{--html-extension} was specified, the local filename will have
+If @samp{--adjust-extension} was specified, the local filename might have
@samp{.html} appended to it. If Wget is invoked with @samp{-E -A.php},
a filename such as @samp{index.php} will match be accepted, but upon
download will be named @samp{index.php.html}, which no longer matches,
Define a header for HTTP downloads, like using
@samp{--header=@var{string}}.
-@item html_extension = on/off
+@item adjust_extension = on/off
Add a @samp{.html} extension to @samp{text/html} or
-@samp{application/xhtml+xml} files without it, or a @samp{.css}
-extension to @samp{text/css} files without it, like @samp{-E}.
+@samp{application/xhtml+xml} files that lack one, or a @samp{.css}
+extension to @samp{text/css} files that lack one, like
+@samp{-E}. Previously named @samp{html_extension} (still acceptable,
+but deprecated).
@item http_keep_alive = on/off
Turn the keep-alive feature on or off (defaults to on). Turning it
projects / wget / blobdiff