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Chapter 39. Dropbox

Camel Dropbox component
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Available as of Camel 2.14
The dropbox: component allows you to treat Dropbox remote folders as a producer or consumer of messages. Using the Dropbox Java Core API (reference version for this component is 1.7.x), this camel component has the following features:
  • As a consumer, download files and search files by queries
  • As a producer, download files, move files between remote directories, delete files/dir, upload files and search files by queries
Maven users will need to add the following dependency to their pom.xml for this component: 
<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-dropbox</artifactId>
    <version>x.x.x</version>
    <!-- use the same version as your Camel core version -->
</dependency>
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URI format
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dropbox://[operation]?[options]
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Where operation is the specific action (typically is a CRUD action) to perform on Dropbox remote folder.

Operation
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Operation
Description
del
deletes files or directories on Dropbox
get
download files from Dropbox
move
move files from folders on Dropbox
put
upload files on Dropbox
search
search files on Dropbox based on string queries
Operations require additional options to work, some are mandatory for the specific operation.

Options
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In order to work with Dropbox API you need to obtain an accessToken and a clientIdentifier. You can refer to the Dropbox documentation that expalins how to get them.
Below are listed the mandatory options for all operations:
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Property
Mandatory
Description
accessToken
true
The access token to make API requests for a specific Dropbox user
clientIdentifier
true
Name of the app registered to make API requests

Del operation
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Delete files on Dropbox.
Works only as Camel producer.
Below are listed the options for this operation:
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Property
Mandatory
Description
remotePath
true
Folder or file to delete on Dropbox

Samples
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from("direct:start").to("dropbox://del?accessToken=XXX&clientIdentifier=XXX&remotePath=/root/folder1").to("mock:result");
from("direct:start").to("dropbox://del?accessToken=XXX&clientIdentifier=XXX&remotePath=/root/folder1/file1.tar.gz").to("mock:result");

Result Message Headers
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The following headers are set on message result:
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Property
Value
DELETED_PATH
name of the path deleted on dropbox

Result Message Body
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The following objects are set on message body result:
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Object type
Description
String
name of the path deleted on dropbox

Get (download) operation
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Download files from Dropbox.
Works as Camel producer or Camel consumer.
Below are listed the options for this operation:
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Property
Mandatory
Description
remotePath
true
Folder or file to download from Dropbox

Samples
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from("direct:start").to("dropbox://get?accessToken=XXX&clientIdentifier=XXX&remotePath=/root/folder1/file1.tar.gz").to("file:///home/kermit/?fileName=file1.tar.gz");
from("direct:start").to("dropbox://get?accessToken=XXX&clientIdentifier=XXX&remotePath=/root/folder1").to("mock:result");
from("dropbox://get?accessToken=XXX&clientIdentifier=XXX&remotePath=/root/folder1").to("file:///home/kermit/");

Result Message Headers
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The following headers are set on message result:
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Property
Value
DOWNLOADED_FILE
in case of single file download, path of the remote file downloaded
DOWNLOADED_FILES
in case of multiple files download, path of the remote files downloaded

Result Message Body
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The following objects are set on message body result:
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Object type
Description
ByteArrayOutputStream
in case of single file download, stream representing the file downloaded
Map<String, ByteArrayOutputStream>
in case of multiple files download, a map with as key the path of the remote file downloaded and as value the stream representing the file downloaded

Move operation
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Move files on Dropbox between one folder to another.
Works only as Camel producer.
Below are listed the options for this operation:
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Property
Mandatory
Description
remotePath
true
Original file or folder to move
newRemotePath
true
Destination file or folder

Samples
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from("direct:start").to("dropbox://move?accessToken=XXX&clientIdentifier=XXX&remotePath=/root/folder1&newRemotePath=/root/folder2").to("mock:result");

Result Message Headers
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The following headers are set on message result:
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Property
Value
MOVED_PATH
name of the path moved on dropbox

Result Message Body
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The following objects are set on message body result:
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Object type
Description
String
name of the path moved on dropbox

Put (upload) operation
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Upload files on Dropbox.
Works as Camel producer.
Below are listed the options for this operation:
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Property
Mandatory
Description
uploadMode
true
add or force this option specifies how a file should be saved on dropbox: in case of "add" the new file will be renamed if a file with the same name already exists on dropbox. in case of "force" if a file with the same name already exists on dropbox, this will be overwritten.
localPath
true
Folder or file to upload on Dropbox from the local filesystem .
remotePath
false
Folder destination on Dropbox. If the property is not set, the component will upload the file on a remote path equal to the local path.

Samples
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from("direct:start").to("dropbox://put?accessToken=XXX&clientIdentifier=XXX&uploadMode=add&localPath=/root/folder1").to("mock:result");
from("direct:start").to("dropbox://put?accessToken=XXX&clientIdentifier=XXX&uploadMode=add&localPath=/root/folder1&remotePath=/root/folder2").to("mock:result");

Result Message Headers
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The following headers are set on message result:
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Property
Value
UPLOADED_FILE
in case of single file upload, path of the remote path uploaded
UPLOADED_FILES
in case of multiple files upload, string with the remote paths uploaded

Result Message Body
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The following objects are set on message body result:
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Object type
Description
String
in case of single file upload, result of the upload operation, OK or KO
Map<String, DropboxResultCode>
in case of multiple files upload, a map with as key the path of the remote file uploaded and as value the result of the upload operation, OK or KO

Search operation
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Search inside a remote Dropbox folder including its sub directories.
Works as Camel producer and as Camel consumer.
Below are listed the options for this operation:
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Property
Mandatory
Description
remotePath
true
Folder on Dropbox where to search in.
query
false
A space-separated list of substrings to search for. A file matches only if it contains all the substrings. If this option is not set, all files will be matched.

Samples
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from("dropbox://search?accessToken=XXX&clientIdentifier=XXX&remotePath=/XXX&query=XXX").to("mock:result");
from("direct:start").to("dropbox://search?accessToken=XXX&clientIdentifier=XXX&remotePath=/XXX").to("mock:result");

Result Message Headers
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The following headers are set on message result:
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Property
Value
FOUNDED_FILES
list of file path founded

Result Message Body
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The following objects are set on message body result:
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Object type
Description
List<DbxEntry>
list of file path founded. For more information on this object refer to Dropbox documentation, http://dropbox.github.io/dropbox-sdk-java/api-docs/v1.7.x/com/dropbox/core/DbxEntry.html
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