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<concept id="GUID-7B5DBFBC-E67F-56F8-AFF8-DFF5019D707F" xml:lang="en"><title>Managing

Files</title><shortdesc>Applications can use the <apiname>ContentAccess::CManager</apiname> class

to manage files. </shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

<section><title>Introduction</title> <p>Some agents may choose to store content

files inside their server private directories. In the file system the private

directories have the following format: </p> <p> <filepath>\private\&lt;process

SID&gt;\protectedfile.ext</filepath>  </p> <p>If an agent want to publish the

existence of its private directory, it specify the name of the private directory

(the SecureID of the process) in the <codeph>opaque_data</codeph> section

of the agent's ECom resource file. See <xref href="GUID-5BD60B1B-CEB7-557A-A9DC-1BB64575F3E2.dita">Content

Access Agent ECOM Resource File</xref>. </p> <p>CAF maps the path to the agent

name, so that it is human-readable. For example: </p> <p> <filepath>\private\&lt;agent_name&gt;\protectedfile.ext</filepath>  </p> <p>The

agents can advertise the existence of files to applications through their

implementation of the <xref href="GUID-D7457871-5361-3684-9A95-FBDB9C2689DD.dita#GUID-D7457871-5361-3684-9A95-FBDB9C2689DD/GUID-0306A1CE-9EAA-3008-A9D7-1AACA95A6081"><apiname>ContentAccess::CAgentManager::GetDir()</apiname></xref> function.

When an application opens a file stored in the private directory, CAF selects

the agent which handles that content based upon the name in the path. If the

file is not stored in a private directory, CAF checks each of the agents whether

they support the file. If no agent supports the file, it reads as plaintext

using F32Agent. </p> </section>

<section><title>Required background</title> <p>Before you start, you must

understand: </p> <ul>

<li id="GUID-E7B3F1D9-8642-5DC2-911F-C1AB89B02C46"><p><xref href="GUID-84B6389A-55CC-53EB-8725-65F753FD7217.dita">Content

Access Framework for DRM</xref>  </p> </li>

<li id="GUID-BDCB532C-22AB-5CF0-9499-363480AB8E4A"><p><xref href="GUID-B6912FE7-4C2A-5FC7-BDA8-702CA2C0214A.dita">Content

Object Attributes</xref>  </p> </li>

</ul> </section>

<section><title>Procedure</title> <ol id="GUID-0E77D596-02DA-5024-A607-4DD96FDC9AD1">

<li id="GUID-6AE6D7DF-B2A2-5B10-BE92-4A268FA7E74E"><p>Create a manager object

using the <xref href="GUID-7F3D9E35-A8FC-35A6-8036-23396BAADFDC.dita#GUID-7F3D9E35-A8FC-35A6-8036-23396BAADFDC/GUID-2F4CB027-777F-3F16-AE9A-8902F4AE87E7"><apiname>CManager::NewL()</apiname></xref> function. </p> </li>

<li id="GUID-CBBF33EB-EFB8-5996-9DE6-914F705C36E0"><p>Perform one or more

of the following tasks as per your requirement: </p> <ul>

<li id="GUID-A3827F88-086A-52F6-8053-BA4CD185D354"><p>Copy a file </p> </li>

<li id="GUID-AE03CB29-84BE-59B6-8A0B-047DCC580C69"><p>Move or rename a file </p> </li>

<li id="GUID-EC87FDE9-0DAF-5903-B303-24A863C348DE"><p>Delete a file </p> </li>

<li id="GUID-8F1E1E88-546E-5F40-B039-510994E5A2D8"><p>Create a directory </p> </li>

<li id="GUID-82C5252F-863D-5AF9-8922-C14F76D48642"><p>List the contents of

a directory </p> </li>

<li id="GUID-69695624-CE3A-5569-AD36-5413B11BBE55"><p>Find the real MIME type

of the file </p> </li>

<li id="GUID-B073B5BE-D492-5A07-A02F-E744B90303A2"><p>Get the attributes of

the content object</p> </li>

<li id="GUID-A643A08C-98F8-5BC4-BA0E-A5E6E946CE8C"><p>Remove a directory </p> </li>

</ul> </li>

</ol> </section>

<section><title>Copy a file</title><p> <xref href="GUID-671191B1-B249-3DD3-A5E8-6F1A41A371C8.dita#GUID-671191B1-B249-3DD3-A5E8-6F1A41A371C8/GUID-61AA708F-8EE5-3D54-AD7A-2E4E7A253877"><apiname>ContentAccess::CManager::CopyFile()</apiname></xref> allows

a user to make a copy of the file. For example, the user may wish to make

a copy of the file onto removable media. When copying content managed by a

DRM agent, the agent only copies the content, it does not copy the rights.

 <codeblock id="GUID-63550964-EEDD-51A2-8316-4B33F794E060" xml:space="preserve">// create a manager object

CManager *manager = CManager::NewL();

// Use the manager to copy a file

TInt result = manager-&gt;CopyFile(source, destination);</codeblock></p></section>

<section><title>Move or rename a file</title><p><xref href="GUID-671191B1-B249-3DD3-A5E8-6F1A41A371C8.dita#GUID-671191B1-B249-3DD3-A5E8-6F1A41A371C8/GUID-234C24A5-5C9E-3575-9FF3-8BC6F1C09902"><apiname>ContentAccess::CManager::RenameFile()</apiname></xref> allows

a user to move or rename a file. For example, the user may wish to move the

file to removable media.  <codeblock id="GUID-25D923DF-CA66-5E8F-87D8-44AFCE75E04E" xml:space="preserve">TInt result = manager-&gt;RenameFile(oldFilename, newFilename);</codeblock></p></section>

<section><title>Delete a file</title><p> <xref href="GUID-671191B1-B249-3DD3-A5E8-6F1A41A371C8.dita#GUID-671191B1-B249-3DD3-A5E8-6F1A41A371C8/GUID-CCE97FF8-FE23-3A16-A093-B2C9388EABDC"><apiname>ContentAccess::CManager::DeleteFileL()</apiname></xref> allows

a client to delete a specified file managed by a DRM agent. </p> <p>The agent

responsible for the content can display a dialog to confirm that the user

wants to delete the file. This is particularly important if the content still

has valid rights. </p> <p>The agent implementation must decide whether to

delete the rights or only the content. </p> <codeblock id="GUID-BBEBA78E-6BBD-5179-9C1E-7329BCCAED73" xml:space="preserve">TFileName filename;

// Use the manager to delete a file

// CAF asks the agent which actually owns the file to delete it.

TInt result = manager-&gt;DeleteFile(filename);</codeblock></section>

<section><title>Create a directory</title><p> <xref href="GUID-671191B1-B249-3DD3-A5E8-6F1A41A371C8.dita#GUID-671191B1-B249-3DD3-A5E8-6F1A41A371C8/GUID-218ADCB8-25BA-31E0-83D2-8E2315CAD3C3"><apiname>ContentAccess::CManager::MkDir()</apiname></xref> allows

a user to create a directory. </p> <codeblock id="GUID-886A4120-8A50-5740-98EA-B389C590F226" xml:space="preserve">TInt result = manager-&gt;MkDir(fullpath);</codeblock> <p>If one or more of the sub-directories do not exist they are created too using

the <xref href="GUID-671191B1-B249-3DD3-A5E8-6F1A41A371C8.dita#GUID-671191B1-B249-3DD3-A5E8-6F1A41A371C8/GUID-83D7D7A2-3046-381F-A856-04FA661F37CD"><apiname> ContentAccess::CManager::MkDirAll()</apiname></xref> function. </p> <codeblock id="GUID-E83DD3C2-6816-5834-8561-565EAC7FEE26" xml:space="preserve">TInt result = manager-&gt;MkDirAll(fullpath);</codeblock></section>

<section><title>List the contents of a directory</title><p>There are three

variations of the <xref href="GUID-671191B1-B249-3DD3-A5E8-6F1A41A371C8.dita#GUID-671191B1-B249-3DD3-A5E8-6F1A41A371C8/GUID-BAA97FAB-5DEA-3FCB-93AD-8157D1AF6AC7"><apiname>ContentAccess::CManager::GetDir()</apiname></xref> function.

They each allow a client to list the contents of an agent's private directory. </p> <p>As

mentioned earlier, it is optional for agents to provide this information. </p> <codeblock id="GUID-5AB17FAF-83A1-518B-9D1D-B00C8818BFC2" xml:space="preserve">CDir *aDir;

TInt result = manager-&gt;GetDir (aName, aEntryAttMask, aEntrySortKey, aDir);</codeblock></section>

<section><title>Find the real MIME type of the file</title><p>The CAF Apparc

recognizer provides a MIME type that is a combination of the file MIME type

and the content within the file. In some cases, such as forwarding DRM content

to another device, it is important to make sure the content is sent with the

correct MIME type. </p> <p>Using the <codeph>""</codeph> empty string <codeph>UniqueId</codeph> allows

an application to determine the MIME type of the file. </p> <codeblock id="GUID-CF389440-3AE5-5AC2-97E1-57E0D30901D6" xml:space="preserve">TBuf &lt;256&gt; mimeType;

TInt result = manager-&gt;GetStringAttribute(EMimeType, mimeType, TVirtualPathPtr(aURI,KNullDesC16()));</codeblock></section>

<section><title>Get the attributes of the content object</title><p>The <xref href="GUID-7F3D9E35-A8FC-35A6-8036-23396BAADFDC.dita"><apiname>CManager</apiname></xref> API

allows applications to retrieve attributes or string attributes from a content

object as described in <xref href="GUID-B6912FE7-4C2A-5FC7-BDA8-702CA2C0214A.dita">Content

Object Attributes</xref>. </p></section>

<section><title>Remove a directory</title><p> <xref href="GUID-671191B1-B249-3DD3-A5E8-6F1A41A371C8.dita#GUID-671191B1-B249-3DD3-A5E8-6F1A41A371C8/GUID-BB1AE25D-11DD-3599-902D-BE5B2D414C26"><apiname> ContentAccess::CManager::RmDir()</apiname></xref> allows

a user to remove a directory. </p> <codeblock id="GUID-9350BEDB-5767-5CD2-9456-8AC1B9DF374F" xml:space="preserve">TInt result = manager-&gt;RmDir(fullpath);</codeblock></section>

<section><title>See also</title> <p><xref href="GUID-E99E0092-5F1D-5715-945E-E83C307357C3.dita">Managing

CAF Agents</xref>  </p> </section>

</conbody></concept>