mod_imagemap - Apache HTTP Server Version 2.2 中文文档
Apache模块 mod_imagemap
| 说明 | 处理服务器端图像映射 |
|---|---|
| 状态 | 基本(B) |
| 模块名 | imagemap_module |
| 源文件 | mod_imagemap.c |
概述
This module processes .map files, thereby
replacing the functionality of the imagemap CGI
program. Any directory or document type configured to use the
handler imap-file (using either
AddHandler或SetHandler)
will be processed by this module.
The following directive will activate files ending with
.map as imagemap files:
AddHandler imap-file map
Note that the following is still supported:
AddType application/x-httpd-imap map
However, we are trying to phase out "magic MIME types" so we are deprecating this method.
New Features
The imagemap module adds some new features that were not possible with previously distributed imagemap programs.
- URL references relative to the Referer: information.
- Default
<base>assignment through a new map directivebase. - No need for
imagemap.conffile. - Point references.
- Configurable generation of imagemap menus.
Imagemap File
The lines in the imagemap files can have one of several formats:
directive value [x, y ...]
directive value "Menu text" [x, y
...]
directive value x, y ... "Menu text"
The directive is one of base, default, poly, circle, rect, or point. The value is an
absolute or relative URL, or one of the special values listed
below. The coordinates are x, y
pairs separated by whitespace. The quoted text is used as the text of
the link if a imagemap menu is generated. Lines beginning with '#' are
comments.
Imagemap File Directives
There are six directives allowed in the imagemap file. The directives can come in any order, but are processed in the order they are found in the imagemap file.
baseDirectiveHas the effect of
<base href="value">. The non-absolute URLs of the map-file are taken relative to this value. Thebasedirective overridesImapBaseas set in a.htaccessfile or in the server configuration files. In the absence of anImapBaseconfiguration directive,basedefaults tohttp://server_name/.base_uriis synonymous withbase. Note that a trailing slash on the URL is significant.defaultDirective- The action taken if the coordinates given do not fit any
of the
poly,circle或rectdirectives, and there are nopointdirectives. Defaults tonocontentin the absence of anImapDefaultconfiguration setting, causing a status code of204 No Contentto be returned. The client should keep the same page displayed. polyDirective- Takes three to one-hundred points, and is obeyed if the user selected coordinates fall within the polygon defined by these points.
circle- Takes the center coordinates of a circle and a point on the circle. Is obeyed if the user selected point is with the circle.
rectDirective- Takes the coordinates of two opposing corners of a rectangle. Obeyed if the point selected is within this rectangle.
pointDirective- Takes a single point. The point directive closest to the
user selected point is obeyed if no other directives are
satisfied. Note that
defaultwill not be followed if apointdirective is present and valid coordinates are given.
Values
The values for each of the directives can any of the following:
- a URL
The URL can be relative or absolute URL. Relative URLs can contain '..' syntax and will be resolved relative to the
basevalue.baseitself will not resolved according to the current value. A statementbase mailto:will work properly, though.map- Equivalent to the URL of the imagemap file itself. No
coordinates are sent with this, so a menu will be generated
unless
ImapMenuis set tonone. menu- Synonymous with
map. referer- Equivalent to the URL of the referring document. Defaults
to
http://servername/if noReferer:header was present. nocontent- Sends a status code of
204 No Content, telling the client to keep the same page displayed. Valid for all butbase. error- Fails with a
500 Server Error. Valid for all butbase, but sort of silly for anything butdefault.
Coordinates
0,0 200,200- A coordinate consists of an x and a y
value separated by a comma. The coordinates are separated
from each other by whitespace. To accommodate the way Lynx
handles imagemaps, should a user select the coordinate
0,0, it is as if no coordinate had been selected.
Quoted Text
"Menu Text"After the value or after the coordinates, the line optionally may contain text within double quotes. This string is used as the text for the link if a menu is generated:
<a href="http://foo.com/">Menu text</a>If no quoted text is present, the name of the link will be used as the text:
<a href="http://foo.com/">http://foo.com</a>If you want to use double quotes within this text, you have to write them as
".
Example Mapfile
#Comments are printed in a 'formatted' or 'semiformatted' menu.
#And can contain html tags. <hr>
base referer
poly map "Could I have a menu, please?" 0,0 0,10 10,10 10,0
rect .. 0,0 77,27 "the directory of the referer"
circle http://www.inetnebr.com/lincoln/feedback/ 195,0 305,27
rect another_file "in same directory as referer" 306,0 419,27
point http://www.zyzzyva.com/ 100,100
point http://www.tripod.com/ 200,200
rect mailto:nate@tripod.com 100,150 200,0 "Bugs?"
Referencing your mapfile
HTML example
<a href="/maps/imagemap1.map">
<img ismap src="/images/imagemap1.gif">
</a>
XHTML example
<a href="/maps/imagemap1.map">
<img ismap="ismap" src="/images/imagemap1.gif" />
</a>
ImapBase 指令
| 说明 | Default base for imagemap files |
|---|---|
| 语法 | ImapBase map|referer|URL |
| 默认值 | ImapBase http://servername/ |
| 作用域 | server config, virtual host, directory, .htaccess |
| 覆盖项 | Indexes |
| 状态 | 基本(B) |
| 模块 | mod_imagemap |
ImapBase directive sets the default
base used in the imagemap files. Its value is
overridden by a base directive within the imagemap
file. If not present, the base defaults to
http://servername/.
参见
ImapDefault 指令
| 说明 | Default action when an imagemap is called with coordinates that are not explicitly mapped |
|---|---|
| 语法 | ImapDefault error|nocontent|map|referer|URL |
| 默认值 | ImapDefault nocontent |
| 作用域 | server config, virtual host, directory, .htaccess |
| 覆盖项 | Indexes |
| 状态 | 基本(B) |
| 模块 | mod_imagemap |
ImapDefault directive sets the default
default used in the imagemap files. Its value is
overridden by a default directive within the
imagemap file. If not present, the default action
is nocontent, which means that a 204 No
Content is sent to the client. In this case, the client
should continue to display the original page.
ImapMenu 指令
| 说明 | Action if no coordinates are given when calling an imagemap |
|---|---|
| 语法 | ImapMenu none|formatted|semiformatted|unformatted |
| 作用域 | server config, virtual host, directory, .htaccess |
| 覆盖项 | Indexes |
| 状态 | 基本(B) |
| 模块 | mod_imagemap |
ImapMenu directive determines the
action taken if an imagemap file is called without valid
coordinates.
none- If ImapMenu is
none, no menu is generated, and thedefaultaction is performed. formatted- A
formattedmenu is the simplest menu. Comments in the imagemap file are ignored. A level one header is printed, then an hrule, then the links each on a separate line. The menu has a consistent, plain look close to that of a directory listing. semiformatted- In the
semiformattedmenu, comments are printed where they occur in the imagemap file. Blank lines are turned into HTML breaks. No header or hrule is printed, but otherwise the menu is the same as aformattedmenu. unformatted- Comments are printed, blank lines are ignored. Nothing is printed that does not appear in the imagemap file. All breaks and headers must be included as comments in the imagemap file. This gives you the most flexibility over the appearance of your menus, but requires you to treat your map files as HTML instead of plaintext.