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If this returns true, the user will be allowed to edit. If it is

false, display the message “This file is

currently being edited by another user!” and return to previous view.

Similarly an Unlock operation (after save or discard) will also be called.

Void CustomClass.UnLock(string FileName)

Note : On a normal save, save the images, calls unlock and returns to thumbnail view of the original

file name (if splits occurred, it will be the new image of the original file name).

13.10 Secure Redactions.

By default, black-

box annotations (“Redaction”) is not actually “burnt”

into the image displayed in the

browser or PDF file, but is added as a separate layer. For security, it is possible to configure TIFF

Server in two alternate ways to securely hide the redacted area.

Option 1

–

The underlying TIFF file is not changed, but Images delivered to users who do not have

permission to edit redactions will have the redaction burnt-in to both the browser images and generated

PDF files.

This can be done by setting ts_secure_redaction=true in the config.inc file. This feature is only

available with the .NET backend.

Option 2

–

The underlying TIFF file is actually changed with the area defined by the redaction

annotation. This can be performed by using the “Permanently Redact TIFF File” menu button.

enable use of the button set

var menu_annots_perm_red=true;

in the config.inc file. It is

also possible to configure an archive folder, where copies of files prior to redaction are saved. This can

be done by setting

var redaction_arch_folder="[archive folder location]"

config.inc. Archived files are named timestampname.tif where name.tif is the original file name.

Option 3

–

The underlying TIFF file is actually changed with the area defined by the redaction

annotation, using a command line tool rather than the TIFF Server interface. The executable

burnredaction.exe is in the TIFF Server bin folder.

burnredaction.exe tiff_file annotation_file archive_folder

A copy of the image will be saved to the folder defined by e. If archive_folder is not specified to a

copy will not be saved. The copied file will be named %timestamp%filename where %timestamp is

the current time and %filename is the original filename.

13.11 Error and Informational Messages

13.11.1 Browser Alert Messages

All alert messages can be customized, suppressed or replaced with alternate functionality by editing the

messages.js file

13.11.2 Server Messages

By default, in the event of an error processing an image, a detailed diagnostic error message is

displayed in place of the image, and the message is also logged in the TIFF Server log file. It is

possible to define a generic message via

genericErrorMessage

in config_ui.inc that will be

displayed to the user instead. [The full message is always written to the log file]. The default setting is

“” which indicates that the detailed m

essage is shown.

A generic error message can be configured as shown in the following example :

var genericErrorMessage="There is a problem displaying this page. A

message has been written to the log file.";

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13.12 Custom Capture Zones

Two optional menu icons “Select Zone” and “Capture” are available to support custom zoned capture.

These menu items can be configured on or off via config.inc (with the variables shown below).

/* Select Zone / Capture */

var menu_selzone=true;

var menu_capzone=true;

The presence of the menu items can also be defined via the tiffserer.aspx URL by using at_selzone and

at_capzone set to “on” or “off”.

Upon pressing “Select Zone” the user is able to define an area of the image, in a similar fashion to that

currently allowed by “Print Area”. The u

ser selects a section of the page/image (they should only be

allowed to select one area at a time, so if they try to zone another section after the first, the first zoned

area would go away and the new one would be the current zone)

Then the user can click button called Capture. This invokes a call to the new custom module method

SetZonedImage and then clears the Zoned area from the page. If the call is unsuccessful an error

message is given, otherwise the clearing of the zoned area will indicate to the user that the operation

has been successful.

The “Zone” mode is still available for the

user to capture multiple zones until the “Select Zone” icon is

pressed again, turning the mode off.

The custom module has the following definition :

Public bool SetZonedImage(string sFilePath, MemoryStream msImageSection)

The msImageSection is a stream of an unencrypted image representing the segment of the image

selected by the user. The method will return true if successful otherwise false.

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14 C

USTOM

UDITING AND

ECURITY

14.1 Auditing

TIFF Server can be configured to audit actions taken by users such as viewing or printing TIFF files.

The variable ts_audit_file in config.inc can be set to specify a log file path. If the variable is set to the

empty string

// Audit File Path - empty string for no auditing - see section 15 of

the reference guide

var ts_audit_file="c:/audit/tiffserver.csv";

By default the audit file has a CSV format as shown below

Timestamp, Action, Status, File Path, User ID, IP Address, Request URL

Example :

02/06/2008 17:14:11, VIEW, OK , C:\dev\ts30\dev\tiffserver\tiffserver\samples\medical.tif, user1,

127.0.0.1,http://localhost/tsdev/tssp.aspx?VD=&PC=Y&FN=C:\dev\ts30\dev\tiffserver\tiffserver\samp

les\medical.tif&MD=1

The set of actions that are written to the audit log are as follows :

Action

Description

VIEW

Viewing a TIFF file. Strictly speaking it is actually the initial request for a

page count that is logged to avoid logging for each individual page that is

viewed.

Printing the file via the “Print” Icon

PDF

Generating a PDF equivalent of the TIFF file via the

“PDF” Icon

SAVEPDF

Generating a PDF equivalent of the TIFF file via the “Save PDF” Icon

GETANNOTATIONS Retrieval of the annotation XML file.

SAVEANNOTATIONS Updating of the annotation XML file.

EDIT

Retrieval of the TIFF file for use in the “Edit” screen.

SAVEEDIT

Updating of the TIFF file after using the “Save” icon in the Edit screen.

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14.2 Custom Auditing

Source code is provided for the auditing class which enables complete customization of action auditing.

The class is AquaforestTIFFServerAudit and is provided as a project in the TIFF Server custom folder

(typically C:\Inetpub\wwwroot\tiffserver\custom). The project will build

AquaforestTIFFServerAudit.dll and this dll should be placed in the TIFF Server bin folder, replacing

the distribution copy which should be backed up first.

14.3 Custom Security

The AquaforestTIFFServerAudit class can also be used to implement custom security checks by

customizing the

securityCheck

method to return false when a specific request should be rejected.

The class has access to the complete Action type and the full set of Request and Session objects via

HttpContext.Current.

The provided code will ensure a message is issued when access is denied :

You do not have

permission to access this file. Please contact your system

administrator.

14.4 Support for Adapting the AquaforestTIFFServerAudit class

The code should be reasonably self-explanatory but please email support@aquaforest.com with any

questions.

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15 S

UPPORT FOR

PDF

ILES

In order to instruct TIFF Server to use the alternative rendering method the parameter at_alt=1 should

be added to tiffserver.aspx. For example :

http://localhost/tiffserver/tiffserver.aspx?at_url=/images/doc1.tif&at_alt=1

If there is a need to access tssp.aspx directly the parameter AR=1 can be used.

15.1 Unsupported Functions

A number of the standard menu items are disabled when displaying PDFs. These are :



PDF (The PDF download function is still available)



Invert



Edit Document



Print (The document can be printed by opening the PDF download and using Adobe Reader

Print)



Print Selection



In addition, although annotations can be applied to PDFs these are not carried through to

“Save PDF”

which merely allows the user to download the source PDF file.

15.2 Conversion Configuration

Two configuration options are available in config.inc. The first,

ts_renderpdf_dpi

specifies the

dpi to be used in the image generated from each PDF page

–

the default is 150.

The second,

ts_renderpdf_resize_quality

determines the method used to resize the image.

If it is set to 1 the a high quality smoothing mode is used. If set to 2 bicubic interpolation is used.

Session["ts_renderpdf_dpi"]=150;

Session["ts_renderpdf_resize_quality"]=1;

15.3 Security Configuration

In order to work correctly with the PDF to Image conversion component, the IIS application needs to

have access to the Windows System32 folder and %TEMP%. A symptom of insufficient privilege is

the PDF page displaying with missing text. Depending upon system settings, this may require a

security setting other than anonymous / local system which would not have sufficient privilege.

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16 I

NTEGRATING

ITH

HAREPOINT

3.0

It is possible to use TIFF Server to display TIFF documents held in Microsoft Sharepoint. Typically a

web part is developed to perform certain tasks and display a TIFF document within an Iframe.

As Sharepoint stores documents in a SQL Server database, the DB configuration should be used as

indicated below :

Config.Inc Settings :

var ts_backend="DB";

….

var ts_db_type="SHAREPOINT";

….

if(ts_db_type=="SHAREPOINT")

{

/* Default Database Settings */

var ts_cstring="Server=aquaforest1;User Id=sa;Password=;Initial

Catalog=WSS_Content_899681e8b2c444d0bb496832dec0f312;";

…..

The connection string settings should be adapted to match your server configuration. The database

name can be found on the Site Collection List in Sharepoint central administration.

The document ID (which can be determined by querying the AllDocs table) is then used as a parameter

to at_url

For example :

http://localhost/tiffserver30/tiffserver.aspx?at_url=7f6ae977-8632-4eaf-bda8-e05f717a0bfe

17 TIFF

ERVER

IRECTORIES

For reference, the following subdirectories are created within the TIFF Server root folder:

17.1 Root Folder

File

Function

tiffserver.aspx

Entry point and viewer control

atf001.aspx

Main Image Display Frame

atf002.aspx

Thumbnail frame

atf003.aspx

Menu Button Frame

atf004.aspx

Hidden Frame For PDF Prinint

atf005.aspx

Annotations Menu

tssp.aspx

Image Display Page

tsspan.aspx

Annotation Retrieve / Save

tssppdf.aspx

PDF Generation

tiffpilot.aspx

PDF Generation

tiffpilot.exe

PDF Generation

Start.aspx

Launch page for test and samples

Sample.aspx

Sample Documents

Test.aspx

Test pages

dbsample.aspx

Database-resident document test page

config.inc

Product Configuration and Options

17.2 Sub Folders

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