The errata list is a list of errors and their corrections that were found after the product was released.
The following errata were submitted by our customers and have not yet been approved or disproved by the author or editor. They solely represent the opinion of the customer.
| Version |
Location |
Description |
Submitted by |
Date submitted |
| Printed |
Page 22
You might want to add a footnote regarding User Authentication as |
follows:
REMOTE_USER env. var. is only set if authentication is actually used,
and it is not supported by all web servers. For Netscape 3.x, when
configured for user authentication, a specified directory can be set
up by 2 files, .nsconfig and .htpasswd, in that directory.
The .htpasswd should contain a password. If you want to give it a real
password associated with a user, do "ypcat passwd |grep <username>".
The .htpasswd should contain:
user1:qewdufyp
user2:2947yer
The .nsconfig should contain:
<Files *>
RequireAuth userfile="/dir_name/.htpasswd" realm="User password
required"
user
pat=(user1|user2)
</Files>
|
Anonymous |
|
| Printed |
Page 22
You might want to add a footnote regarding User Authentication as |
follows:
REMOTE_USER env. var. is only set if authentication is actually used,
and it is not supported by all web servers. For Netscape 3.x, when
configured for user authentication, a specified directory can be set
up by 2 files, .nsconfig and .htpasswd, in that directory.
The .htpasswd should contain a password. If you want to give it a real
password associated with a user, do "ypcat passwd |grep <username>".
The .htpasswd should contain:
user1:qewdufyp
user2:2947yer
The .nsconfig should contain:
<Files *>
RequireAuth userfile="/dir_name/.htpasswd" realm="User password
required"
user
pat=(user1|user2)
</Files>
|
Anonymous |
|
| Printed |
Page 46
|
The Line 2 in the second code example now reads:
chop($current_date '/bin/date');
It should be:
`/bin/date` (i.e. with backquotes)
|
Anonymous |
|
| Printed |
Page 46
|
The Line 2 in the second code example now reads:
chop($current_date '/bin/date');
It should be:
`/bin/date` (i.e. with backquotes)
|
Anonymous |
|
| Printed |
Page 69
The URL given for uncgi has changed. It is now located at |
http://www.midwinter.com/~koreth/uncgi.html
|
Anonymous |
|
| Printed |
Page 69
The URL given for uncgi has changed. It is now located at |
http://www.midwinter.com/~koreth/uncgi.html
|
Anonymous |
|
| Printed |
Page 121
|
Code example under second paragraph, third line of "for" loop reads:
$max_length - ($loads[$loop - 1] * 10) );
it should read:
$origin[1] - ($loads[$loop -1] * 10) );
The current code results in load averages being graphed beneath the
axis line.
|
Anonymous |
|
| Printed |
Page 121
|
Code example under second paragraph, third line of "for" loop reads:
$max_length - ($loads[$loop - 1] * 10) );
it should read:
$origin[1] - ($loads[$loop -1] * 10) );
The current code results in load averages being graphed beneath the
axis line.
|
Anonymous |
|
| Printed |
Page 122
The third code example has a for loop; however, the example |
fails to delimit the for loop with an ending '}'. The last line of
that code segment should contain a } - without it the program will not
work.
|
Anonymous |
|
| Printed |
Page 122
The third code example has a for loop; however, the example |
fails to delimit the for loop with an ending '}'. The last line of
that code segment should contain a } - without it the program will not
work.
|
Anonymous |
|
| Printed |
Page 213
The following string is given (twice) to indicate how to check |
for valid e-mail addresses:
/([w-+.]+)@([w-+.]+)/
This still allows for addresses like "; shaun@minc.com ;" which could
at least cause errors and at most be a security hole.
To prevent possible problems, the script writer should ensure nothing
can appear before or after the e-mail address.
The correction is simple: /^([w-+.]+)@([w-+.]+)$/
This, of course, assumes the script writer has already stripped any
whitespace from the beginning and end of the e-mail string.
|
Anonymous |
|
| Printed |
Page 213
The following string is given (twice) to indicate how to check |
for valid e-mail addresses:
/([w-+.]+)@([w-+.]+)/
This still allows for addresses like "; shaun@minc.com ;" which could
at least cause errors and at most be a security hole.
To prevent possible problems, the script writer should ensure nothing
can appear before or after the e-mail address.
The correction is simple: /^([w-+.]+)@([w-+.]+)$/
This, of course, assumes the script writer has already stripped any
whitespace from the beginning and end of the e-mail string.
|
Anonymous |
|
| Printed |
Page 398
Next-to-last answer on page: |
print "Content-type: text/plain
"
should read
print "Content-type: text/plain
";
and
print "Location: http://some.machine/some.doc
"";
should read
print "Location: http://some.machine/some.doc
";
|
Anonymous |
|
| Printed |
Page 398
A CGI program can only send one Location header. You also cannot |
send a MIME content type if you want the server to perform
redirection. For example, the following is not valid:
- ----------------------
#!/usr/local/bin/perl
#...
$query = new CGI::Form;
print $query->header;
#...Form display
#...
#Action
print "Location: http://some.machine/some.doc
";
- ----------------------
If a user wants to display a message using server redirection as above
w/o redisplaying the form, we need an example that shows the action
implemented in a separate file from the form display. Otherwise the
default action is the CGI script itself. I haven't figured out a way
to do this using CGI modules.
|
Anonymous |
|
| Printed |
Page 398
Next-to-last answer on page: |
print "Content-type: text/plain
"
should read
print "Content-type: text/plain
";
and
print "Location: http://some.machine/some.doc
"";
should read
print "Location: http://some.machine/some.doc
";
|
Anonymous |
|
| Printed |
Page 398
A CGI program can only send one Location header. You also cannot |
send a MIME content type if you want the server to perform
redirection. For example, the following is not valid:
- ----------------------
#!/usr/local/bin/perl
#...
$query = new CGI::Form;
print $query->header;
#...Form display
#...
#Action
print "Location: http://some.machine/some.doc
";
- ----------------------
If a user wants to display a message using server redirection as above
w/o redisplaying the form, we need an example that shows the action
implemented in a separate file from the form display. Otherwise the
default action is the CGI script itself. I haven't figured out a way
to do this using CGI modules.
|
Anonymous |
|
| Printed |
Page 415
The line |
$filename = $data{'input'};
should read
$filename = $data{'input_file'};
|
Anonymous |
|
| Printed |
Page 415
The line |
$filename = $data{'input'};
should read
$filename = $data{'input_file'};
|
Anonymous |
|