This component provides access to remote file systems over the FTP and SFTP protocols.

ftp://[username@]hostname[:port]/directoryname[?options]
sftp://[username@]hostname[:port]/directoryname[?options]

Where directoryname represents the underlying directory. Can contain nested folders. The username is currently only possible to provide in the hostname parameter.

If no username is provided then anonymous login is attempted using no password. If no port number is provided. FUSE Mediation Router will provide default values according to the protocol. (ftp = 21, sftp = 22)

ftp://[email protected]/public/upload/images/holiday2008?password=secret&binary=true ftp://[email protected]:12049/reports/2008/password=secret&binary=false ftp://publicftpserver.com/download

	More information
	This component is an extension of the File2 component. So there are more samples and details on the File2 component page.

The options below are exclusive for the FTP2 component.

The option readLock can be used to force FUSE Mediation Router not to consume files that is currently in the progress of being written. However this option is default turned off, as it requires that the user has write access. There are other solutions to avoid consuming files that are currently being written over FTP, for instance you can write the a temporary destination and move the file after it has been written.

The ftp producer does not support appending, to existing files. Any existing files on the remote server will be deleted before the file is written.

The following message headers can be used to affect the behavior of the component

FUSE Mediation Router supports consuming from remote FTP servers and downloading the files directly into a local work directory. This avoids reading the entire remote file content into memory as its streamed directly into the local file using FileOutputStream.

FUSE Mediation Router will store the into a local file with the same name as the remote file, thought with .progress as extension while the file is being downloaded. Afterwards the file is renamed to remove the .inprogress prefix. And finally when the Exchange is complete the local file is deleted.

So if you want to download files from a remote FTP server and store it as files then you need to route to a file endpoint such as:

from("ftp://[email protected]?password=secret&localWorkDirectory=/tmp").to("file://inbox");

Optimization by renaming work file

The route above is ultra efficient as it avoids reading the entire file content into memory. It will download the remote file directly to a local file stream. The java.io.File handle is then used as Exchange body. The file producer leverages this fact and can work directly on the work file java.io.File handle and perform a java.io.File.rename to the target filename. As FUSE Mediation Router know it's a local work file it can optimize and use a rename instead of a file copy, as the work file is meant to be deleted anyway.

In the sample below we setup FUSE Mediation Router to download all the reports from the FTP server once every hour (60 min) as BINARY content and store it as files on the local file system.

protected RouteBuilder createRouteBuilder() throws Exception {
    return new RouteBuilder() {
        public void configure() throws Exception {
            // we use a delay of 60 minutes (eg. once pr. hour we poll the FTP server
            long delay = 60 * 60 * 1000L;

            // from the given FTP server we poll (= download) all the files
            // from the public/reports folder as BINARY types and store this as files
            // in a local directory. Camel will use the filenames from the FTPServer

            // notice that the FTPConsumer properties must be prefixed with "consumer." in the URL
            // the delay parameter is from the FileConsumer component so we should use consumer.delay as
            // the URI parameter name. The FTP Component is an extension of the File Component.
            from("ftp://scott@localhost/public/reports?password=tiger&binary=true&consumer.delay=" + delay).
                    to("file://target/test-reports");
        }
    };
}

And the route using Spring DSL:

  <route>
     <from uri="ftp://scott@localhost/public/reports?password=tiger&amp;binary=true&amp;delay=60000"/>
     <to uri="file://target/test-reports"/>
  </route>

The FTP consumer is build as a scheduled consumer to be used in the from route. However if you want to start consuming from a FTP server triggered within a route it's a bit cumbersome to do this in FUSE Mediation Router 1.x (we plan to improve this in FUSE Mediation Router 2.x). However it's possible as this code below demonstrates.

In the sample we have a Seda queue where a message arrives that holds a message containing a filename to poll from a remote FTP server. So we setup a basic FTP url as:

// we use delay=5000 to use 5 sec delay between pools to avoid polling a second time before we stop the consumer
// this is because we only want to run a single poll and get the file
private String getFtpUrl() {
    return "ftp://admin@localhost:" + getPort() + "/getme?password=admin&binary=false&delay=5000";
}

And then we have the route where we use Processor within the route so we can use Java code. In this Java code we create the ftp consumer that downloads the file we want. And after the download we can get the content of the file and put it in the original exchange that continues being routed. As this is based on an unit test it routes to a Mock endpoint.

from("seda:start").process(new Processor() {
    public void process(final Exchange exchange) throws Exception {
        // get the filename from our custome header we want to get from a remote server
        String filename = exchange.getIn().getHeader("myfile", String.class);

        // construct the total url for the ftp consumer
        // add the fileName option with the file we want to consume
        String url = getFtpUrl() + "&fileName=" + filename;

        // create a ftp endpoint
        Endpoint ftp = context.getEndpoint(url);

        // create a polling consumer where we can poll the myfile from the ftp server
        PollingConsumer consumer = ftp.createPollingConsumer();

        // must start the consumer before we can receive
        consumer.start();

        // poll the file from the ftp server
        Exchange result = consumer.receive();

        // the result is the response from the FTP consumer (the downloaded file)
        // replace the outher exchange with the content from the downloaded file
        exchange.getIn().setBody(result.getIn().getBody());

        // stop the consumer
        consumer.stop();
    }
}).to("mock:result");

FUSE Mediation Router supports pluggable filtering strategies. This strategy it to use the build in org.apache.camel.component.file.GenericFileFilter in Java. You can then configure the endpoint with such a filter to skip certain filters before being processed.

In the sample we have build our own filter that only accepts files starting with report in the filename.

public class MyFileFilter implements GenericFileFilter {

    public boolean accept(GenericFile file) {
        // we only want report files 
        return file.getFileName().startsWith("report");
    }
}

And then we can configure our route using the filter attribute to reference our filter (using # notation) that we have defines in the spring XML file:

   <!-- define our sorter as a plain spring bean -->
   <bean id="myFilter" class="com.mycompany.MyFileFilter"/>

  <route>
    <from uri="ftp://[email protected]?password=secret&amp;filter=#myFilter"/>
    <to uri="bean:processInbox"/>
  </route>

The ANT path matcher is a filter that is shipped out-of-the-box in the camel-spring jar. So you need to depend on camel-spring if you are using Maven. The reasons is that we leverage Spring's AntPathMatcher to do the actual matching.

The file paths is matched with the following rules:

The sample below demonstrates how to use it:

<camelContext xmlns="http://camel.apache.org/schema/spring">
    <template id="camelTemplate"/>

    <!-- use myFilter as filter to allow setting ANT paths for which files to scan for -->
    <endpoint id="myFTPEndpoint" uri="ftp://admin@localhost:20123/antpath?password=admin&amp;recursive=true&amp;delay=10000&amp;initialDelay=2000&amp;filter=#myAntFilter"/>

    <route>
        <from ref="myFTPEndpoint"/>
        <to uri="mock:result"/>
    </route>
</camelContext>

<!-- we use the AntPathMatcherRemoteFileFilter to use ant paths for includes and exlucde -->
<bean id="myAntFilter" class="org.apache.camel.component.file.AntPathMatcherGenericFileFilter">
    <!-- include and file in the subfolder that has day in the name -->
    <property name="includes" value="**/subfolder/**/*day*"/>
    <!-- exclude all files with bad in name or .xml files. Use comma to seperate multiple excludes -->
    <property name="excludes" value="**/*bad*,**/*.xml"/>
</bean>

This component has log level TRACE that can be helpful if you have problems.