Processors - File Processor

Contents

  1. 1 Introduction
  2. 2 Configuration
    1. 2.1 Deleting elements
    2. 2.2 (Since July 21st, 2012) Moving elements
    3. 2.3 (Since July 21st, 2012) Copying elements
    4. 2.4 Copying files with scp

Introduction

The oxf:file processor allows you to perform operations related to files on disk.

NOTE: As of October 2009, it supports a limited number of functions. In the future, it may be enhanced to provide more actions such as renaming files, moving files, etc.

Type Name Purpose Mandatory
Input config Configuration Yes

Configuration

The config input contains a root config element containing a sequence of elements named by the operation to perform. For example,  the delete element deletes a file.

Deleting elements

The delete element allows you to delete a file on disk.

The delete element contains a file element which specifies the name of the file to delete, and an optional directory element containing a base directory against which the file name is resolved.

If the file exists and is writable, the processor attempts to delete it. Otherwise, no attempt is made. If an attempt is made and deleting fails, an exception is raised.

The following is an example of a pipeline running oxf:file in order to delete a file called SomeImpossibleFileName.jpg present under the C:/TEMP directory.

<p:config xmlns:p="http://www.orbeon.com/oxf/pipeline"
    xmlns:oxf="http://www.orbeon.com/oxf/processors">
    <p:processor name="oxf:file">
        <p:input name="config">
            <config>
                <delete>
                    <file>SomeImpossibleFileName.jpg</file>
                    <directory>C:/TEMP</directory>
                </delete>
            </config>
        </p:input>
    </p:processor>
</p:config>

(Since July 21st, 2012) Alternatively, the file to delete can be specified by a file: or oxf: URL:

<p:config xmlns:p="http://www.orbeon.com/oxf/pipeline"
    xmlns:oxf="http://www.orbeon.com/oxf/processors">
    <p:processor name="oxf:file">
        <p:input name="config">
            <config>
                <delete>
                    <url>oxf:/somewhere/SomeImpossibleFileName.jpg</url>
                </delete>
            </config>
        </p:input>
    </p:processor>
</p:config>

(Since July 21st, 2012) Moving elements

The move element moves a file. 

The move element contains from and to elements to specify the locations before and after the operation.

In each of these elements, locations can be specified either as an operating system dependent file and (optional) directory paths or as an oxf: or file: URL.

The to element accepts an optional make-directories element (default = false) to specify if the destination directory should be created if it doesn't exist.

The following moves a file from the C:/TEMP directory specified using its OS path to the location oxf:/somewhere/image.jpg and creates the destination directory if it doesn't exist:

<p:processor name="oxf:file-processor">
    <p:input name="config">
        <config>
            <move>
                <from>
                    <file>SomeImpossibleFileName.jpg</file>
                    <directory>C:/TEMP</directory>
                </from>
                <to>
                    <url>oxf:/somewhere/image.jpg</url>
                    <make-directories>true</make-directories>
                </to>
            </move>
        </config>
    </p:input>
</p:processor>

(Since July 21st, 2012) Copying elements

The copy element moves a file. 

The copy element contains from and to elements to specify the locations before and after the operation.

In each of these elements, locations can be specified either as an operating system dependent file and (optional) directory paths or as an oxf: or file: URL.

The to element accepts an optional make-directories element (default = false) to specify if the destination directory should be created if it doesn't exist.

The following copies a file from the C:/TEMP directory specified using its OS path to the location oxf:/somewhere/image.jpg and creates the destination directory if it doesn't exist:

<p:processor name="oxf:file-processor">
    <p:input name="config">
        <config>
            <copy>
                <from>
                    <file>SomeImpossibleFileName.jpg</file>
                    <directory>C:/TEMP</directory>
                </from>
                <to>
                    <url>oxf:/somewhere/image.jpg</url>
                    <make-directories>true</make-directories>
                </to>
            </copy>
        </config>
    </p:input>
</p:processor>

Copying files with scp

The scp element allows you to copy files through the scp (secure copy) protocol.

The scp element contains attributes controlling the connection, source, and destination of the copy. The attributes are the same as those supported by the scp ant task.

The following example shows how to copy a local file to a remote destination, and then copy it back under a different name:

<config>
    <scp trust="true"
         file="/my/local/file.txt"
         remoteTodir="john@example.org:"/>
    <scp trust="true"
         file="john@example.org:file.txt"
         localTofile="/my/local/new-file.txt"/>
</config>

Here is the list of ant attributes supported on the scp element (from the scp ant task):

Attribute Description Required
file The file to copy. This can be a local path or a remote path of the form user[:password]@host:/directory/path. :password can be omitted if you use key based authentication or specify the password attribute. The way remote path is recognized is whether it contains @ character or not. This will not work if your localPath contains @ character. Yes, unless a nested element is used.
localFile This is an alternative to the file attribute. But this must always point to a local file. The reason this was added was that when you give file attribute it is treated as remote if it contains @ character. This character can exist also in local paths. since Ant 1.6.2 Alternative to file attribute.
remoteFile This is an alternative to the file attribute. But this must always point to a remote file. since Ant 1.6.2 Alternative to file attribute.
todir The directory to copy to. This can be a local path or a remote path of the form user[:password]@host:/directory/path. :password can be omitted if you use key based authentication or specify the password attribute. The way remote path is recognized is whether it contains @ character or not. This will not work if your localPath contains @ character. Yes
localTodir This is an alternative to the todir attribute. But this must always point to a local directory. The reason this was added was that when you give todir attribute it is treated as remote if it contains @ character. This character can exist also in local paths. since Ant 1.6.2 Alternative to todir attribute.
localTofile Changes the file name to the given name while receiving it, only useful if receiving a single file. since Ant 1.6.2 Alternative to todir attribute.
remoteTodir This is an alternative to the todir attribute. But this must always point to a remote directory. since Ant 1.6.2 Alternative to todir attribute.
remoteTofile Changes the file name to the given name while sending it, only useful if sending a single file. since Ant 1.6.2 Alternative to todir attribute.
port The port to connect to on the remote host. No, defaults to 22.
trust This trusts all unknown hosts if set to yes/true.
Note If you set this to false (the default), the host you connect to must be listed in your knownhosts file, this also implies that the file exists.		 No, defaults to No.
knownhosts This sets the known hosts file to use to validate the identity of the remote host. This must be a SSH2 format file. SSH1 format is not supported. No, defaults to ${user.home}/.ssh/known_hosts.
failonerror Whether to halt the build if the transfer fails. No; defaults to true.
password The password. Not if you are using key based authentication or the password has been given in the file or todir attribute.
keyfile Location of the file holding the private key. Yes, if you are using key based authentication.
passphrase Passphrase for your private key. Yes, if you are using key based authentication.
verbose Determines whether SCP outputs verbosely to the user. Currently this means outputting dots/stars showing the progress of a file transfer. since Ant 1.6.2 No; defaults to false.
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