MACROMEDIA COLDFUSION MX 61-DEVELOPING COLDFUSION MX, Develop Manual

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Using cffile 823
Note: Modern versions of Internet Explorer and Netscape support MIME type associations. Other
browsers and older versions might ignore these associations.
ColdFusion saves any uploaded file if you omit the
accept
attribute or specify "*/*". You can
restrict the file types, as demonstrated in the following examples.
The following
cffile
tag saves an image file only if it is in the GIF format:
<cffile action="Upload"
fileField="Form.FiletoUpload"
destination="c:\uploads\"
nameConflict="Overwrite"
accept="image/gif">
The following
cffile
tag saves an image file only if it is in GIF or JPEG format:
<cffile action="Upload"
fileField="Form.FiletoUpload"
destination="c:\uploads\"
nameConflict="Overwrite"
accept="image/gif, image/jpeg">
Note: If you receive an error similar to "The MIME type of the uploaded file (image/jpeg) was not
accepted by the server", enter
accept="image/jpeg"
to accept JPEG files.
This
cffile
tag saves any image file, regardless of the format:
<cffile action="Upload"
fileField="Form.FiletoUpload"
destination="c:\uploads\"
nameConflict="Overwrite"
accept="image/*">
Setting file and directory attributes
In Windows, you specify file attributes using the
cffile attributes
attribute. In UNIX, you
specify file or directory permissions using the
mode
attribute of the
cffile
or
cfdirectory
tag.
Windows
In Windows, you can set the following file attributes:
•
Hidden
•
Normal
•
ReadOnly
To specify several attributes in CFML, use a comma-separated list for the
attributes
attribute;
for example,
attributes="ReadOnly,Hidden"
. If you do not use the
attributes
attribute, the
file’s existing attributes are maintained. If you specify any other attributes in addition to Normal,
the additional attribute overrides the Normal setting.
UNIX
In UNIX, you can individually set permissions on files and directories for each of three types of
users—owner, group, and other. You use a number for each user type. This number is the sum of
the numbers for the individual permissions allowed. Values for the
mode
attribute correspond to
octal values for the UNIX
chmod
command:
•
4 = read
•
2 = write