...
This page is documentation on accessing Tika as a RESTful API via the Tika server (tika-server module). See TikaServer in Tika 2.x for how to configure tika-server
. See TikaServerEndpointsCompared for a summary of differences across the endpoints.
Table of Contents |
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Installation of Tika Server
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- Checkout the source from SVN as detailed on the Apache Tika contributions page or retrieve the latest code from Github,
- Build source using Maven
- Run the Apache Tika JAXRS server runnable jar.
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git clone https://github.com/apache/tika.git tika-trunk
cd ./tika-trunk/
mvn install
cd ./tika-server/target/
java -jar tika-server-x.x.jar
|
...
You will then see a message such as the following:
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$ java -jar tika-server-1.24-SNAPSHOT.jar
19-Jan-2015 14:23:36 org.apache.tika.server.TikaServerCli main
INFO: Starting Apache Tika 1.8-SNAPSHOT server
19-Jan-2015 14:23:36 org.apache.cxf.endpoint.ServerImpl initDestination
INFO: Setting the server's publish address to be http://localhost:9998/
19-Jan-2015 14:23:36 org.slf4j.impl.JCLLoggerAdapter info
INFO: jetty-8.y.z-SNAPSHOT
19-Jan-2015 14:23:36 org.slf4j.impl.JCLLoggerAdapter info
INFO: Started SelectChannelConnector@localhost:9998
19-Jan-2015 14:23:36 org.apache.tika.server.TikaServerCli main
INFO: Started
|
...
You can specify additional information to change the host name and port number:
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java -jar tika-server-x.x.jar --host=intranet.local --port=12345
|
...
Using prebuilt Docker image
There is an unofficial image for Tika that has been available for yearsOfficial image for Tika can be found at DockerHub. You can download and start it with:
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javadocker -jarrun tika-server-x.x.jar --host=intranet.local --port=12345 |
With --rm
option it will be deleted as soon as container stopped. Dockerfile can be found at Github.
-d -p 9998:9998 apache/tika:<version> |
Full set of documentation can be found at Github.There is also an in-progress effort to publish an official Tika Docker image. That code can be found at https://github.com/apache/tika-docker and will eventually replace the version produced by LogicalSpark.
Running Tika Server as Unix Service
...
Your specific customization to Tika server setup are stored in the /etc/init.d/tika
file.
Tika Server Services
Configuring Tika server in 2.x
See TikaServer in Tika 2.x for the details of configuring tika-server in 2.x.
Tika Server Services
All services that All services that take files use HTTP "PUT" requests. When "PUT" is used, the original file must be sent in request body without any additional encoding (do not use multipart/form-data or other containers).
...
- 200 Ok - request completed sucessfully
- 204 No content - request completed sucessfully, result is empty
- 422 Unprocessable Entity - Unsupported mime-type, encrypted document & etc
- 500 Error - Error while processing document
NOTE: Please see TikaServerEndpointsCompared for a quick comparison of the features of some of these endpoints.
Metadata Resource
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/meta
|
HTTP PUTs a document to the /meta service and you get back "text/csv" of the metadata.
Some Example calls with cURL:
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$ curl -X PUT --data-ascii @zipcode.csv http://localhost:9998/meta --header "Content-Type: text/csv"
$ curl -T price.xls http://localhost:9998/meta
|
Returns:
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"Content-Encoding","ISO-8859-2"
"Content-Type","text/plain"
|
Get metadata as JSON:
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$ curl -T test_recursive_embedded.docx http://localhost:9998/meta --header "Accept: application/json"
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Or XMP:
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$ curl -T test_recursive_embedded.docx http://localhost:9998/meta --header "Accept: application/rdf+xml"
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Get specific metadata key's value as simple text string:
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$ curl -T test_recursive_embedded.docx http://localhost:9998/meta/Content-Type --header "Accept: text/plain"
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Returns:
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application/vnd.openxmlformats-officedocument.wordprocessingml.document
|
Get specific metadata key's value(s) as CSV:
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$ curl -T test_recursive_embedded.docx http://localhost:9998/meta/Content-Type --header "Accept: text/csv"
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Or JSON:
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$ curl -T test_recursive_embedded.docx http://localhost:9998/meta/Content-Type --header "Accept: application/json"
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Or XMP:
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$ curl -T test_recursive_embedded.docx http://localhost:9998/meta/Content-Type --header "Accept: application/rdf+xml"
|
...
Metadata Resource also accepts the files as multipart/form-data attachments with POST. Posting files as multipart attachments may be beneficial in cases when the files are too big for them to be PUT directly in the request body. Note that Tika JAX-RS server makes the best effort at storing some of the multipart content to the disk while still supporting the streaming:
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curl -F upload=@price.xls URL http://localhost:9998/meta/form
|
Note that the address has an extra "/form" path segment.
Tika Resource
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/tika
|
HTTP PUTs a document to the /tika service and you get back the extracted text in text. HTTP GET prints , html or "body" format (see below). See also the /rmeta
endpoint for text and metadata of embedded objects.
HTTP GET prints a greeting stating the server is a greeting stating the server is up.
Some Example calls with cURL:
Get HELLO message back
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$ curl -X GET http://localhost:9998/tika
This is Tika Server. Please PUT
|
Get the Text of a Document
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$ curl -X PUT --data-binary @GeoSPARQL.pdf http://localhost:9998/tika --header "Content-type: application/pdf"
$ curl -T price.xls http://localhost:9998/tika --header "Accept: text/html"
$ curl -T price.xls http://localhost:9998/tika --header "Accept: text/plain"
|
Use the Boilerpipe handler (equivalent to tika-app's --text-main
) with text output:
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$ curl -T price.xls http://localhost:9998/tika/main --header "Accept: text/plain"
|
Multipart Support
Tika Resource also accepts the files as multipart/form-data attachments with POST. Posting files as multipart attachments may be beneficial in cases when the files are too big for them to be PUT directly in the request body. Note that Tika JAX-RS server makes the best effort at storing some of the multipart content to the disk while still supporting the streaming:
With Tika 1.27 and greater, you can get the text and metadata of a file in json format with:
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$ curl -T price.xls http://localhost:9998/tika --header "Accept: application/json" |
To specify whether you want the content to be text (vs. html) specify the handler type after /tika
:
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$ curl -T price.xls |
No Format |
curl -F upload=@price.xls URL http://localhost:9998/tika/form |
Note that the address has an extra "/form" path segment.
Detector Resource
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/detect/stream
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HTTP PUTs a document and uses the Default Detector from Tika to identify its MIME/media type. The caveat here is that providing a hint for the filename can increase the quality of detection.
Default return is a string of the Media type name.
Some Example calls with cURL:
PUT an RTF file and get back RTF
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$ curl -X PUT --data-binary @TODO.rtf http://localhost:9998/detect/stream
|
PUT a CSV file without filename hint and get back text/plain
text --header "Accept: application/json" |
Skip Embedded Files/Attachments
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$ curl -T test_recursive_embedded.docx http://localhost:9998/tika --header "Accept: text/plain" --header"X-Tika-Skip-Embedded: true" |
Multipart Support
Tika Resource also accepts the files as multipart/form-data attachments with POST. Posting files as multipart attachments may be beneficial in cases when the files are too big for them to be PUT directly in the request body. Note that Tika JAX-RS server makes the best effort at storing some of the multipart content to the disk while still supporting the streaming:
No Format |
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curl -F upload=@price.xls URL |
No Format |
$ curl -X PUT --upload-file foo.csv http://localhost:9998/detecttika/stream |
PUT a CSV file with filename hint and get back text/csv
form
|
Note that the address has an extra "/form" path segment.
Detector Resource
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/detect/stream
|
HTTP PUTs a document and uses the Default Detector from Tika to identify its MIME/media type. The caveat here is that providing a hint for the filename can increase the quality of detection.
Default return is a string of the Media type name.
Some Example calls with cURL:
PUT an RTF file and get back RTF
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$ curl -X PUT --data-binary @TODO.rtf http://localhost:9998/detect/stream
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PUT a CSV file without filename hint and get back text/plain
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$ curl -X PUT |
No Format |
$ curl -X PUT -H "Content-Disposition: attachment; filename=foo.csv" --upload-file foo.csv http://localhost:9998/detect/stream
|
Language Resource
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/language/stream
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PUT a CSV file with filename hint and get back text/csv
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$ curl -X PUT -H "Content-Disposition: attachment; filename=foo.csv" --upload-file foo.csv http://localhost:9998/detect/stream
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Language Resource
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/language/stream
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HTTP PUTs or POSTs a UTF-8 text file to HTTP PUTs or POSTs a UTF-8 text file to the LanguageIdentifier to identify its language.
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PUT a TXT file with English This is English! and get back en
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$ curl -X PUT --data-binary @foo.txt http://localhost:9998/language/stream
en
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PUT a TXT file with French comme çi comme ça and get back fr
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curl -X PUT --data-binary @foo.txt http://localhost:9998/language/stream
fr
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/language/string
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HTTP PUTs or POSTs a text string to the LanguageIdentifier to identify its language.
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PUT a string with English This is English! and get back en
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$ curl -X PUT --data "This is English!" http://localhost:9998/language/string
en
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PUT a string with French comme çi comme ça and get back fr
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curl -X PUT --data "comme çi comme ça" http://localhost:9998/language/string
fr
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Translate Resource
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/translate/all/translator/src/dest
|
...
PUT a TXT file named sentences with Spanish me falta práctica en Español and get back the English translation using Lingo24
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$ curl -X PUT --data-binary @sentences http://localhost:9998/translate/all/org.apache.tika.language.translate.Lingo24Translator/es/en
lack of practice in Spanish
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PUT a TXT file named sentences with Spanish me falta práctica en Español and get back the English translation using Microsoft
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$ curl -X PUT --data-binary @sentences http://localhost:9998/translate/all/org.apache.tika.language.translate.MicrosoftTranslator/es/en
I need practice in Spanish
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PUT a TXT file named sentences with Spanish me falta práctica en Español and get back the English translation using Google
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$ curl -X PUT --data-binary @sentences http://localhost:9998/translate/all/org.apache.tika.language.translate.GoogleTranslator/es/en
I need practice in Spanish
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No Format |
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/translate/all/src/dest
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HTTP PUTs or POSTs a document to the identified *translator* and auto-detects the *src* language using LanguageIdentifiers, and then translates *src* to *dest*
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PUT a TXT file named sentences2 with French comme çi comme ça and get back the English translation using Google auto-detecting the language
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$ curl -X PUT --data-binary @sentences2 http://localhost:9998/translate/all/org.apache.tika.language.translate.GoogleTranslator/en
so so
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Recursive Metadata and Content
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/rmeta
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Returns a JSONified list of Metadata objects for the container document and all embedded documents. The text that is extracted from each document is stored in the metadata object under "X-TIKA:content".
No Format |
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$ curl -T test_recursive_embedded.docx http://localhost:9998/rmeta
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Returns:
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[
{"Application-Name":"Microsoft Office Word",
"Application-Version":"15.0000",
"X-Parsed-By":["org.apache.tika.parser.DefaultParser","org.apache.tika.parser.microsoft.ooxml.OOXMLParser"],
"X-TIKA:content":"embed_0 "
...
},
{"Content-Encoding":"ISO-8859-1",
"Content-Length":"8",
"Content-Type":"text/plain; charset=ISO-8859-1"
"X-TIKA:content":"embed_1b",
...
}
...
]
|
The default format for "X-TIKA:content" is XML. However, you can select "text only" with
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/rmeta/text
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HTML with
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/rmeta/html
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and no content (metadata only) with
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/rmeta/ignore
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Multipart Support
Metadata Resource also accepts the files as multipart/form-data attachments with POST. Posting files as multipart attachments may be beneficial in cases when the files are too big for them to be PUT directly in the request body. Note that Tika JAX-RS server makes the best effort at storing some of the multipart content to the disk while still supporting the streaming:
No Format |
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curl -F upload=@test_recursive_embedded.docx URL http://localhost:9998/rmeta/form
|
Note that the address has an extra "/form" path segment.
Skip Embedded Files/Attachments
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$ curl -T test_recursive_embedded.docx http://localhost:9998/rmeta --header "X-Tika-Skip-Embedded: true" |
Specifying Limits
As of Tika 1.25, you can limit the maximum number of embedded resources and the write limit per handler.
...
No Format |
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curl -T test_recursive_embedded.docx --header "writeLimit: 1000" http://localhost:9998/rmeta |
Unpack Resource
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/unpack
|
HTTP PUTs an embedded document type to the /unpack service and you get back a zip or tar of the raw bytes of the embedded files. Note that this does not operate recursively; it extracts only the child documents of the original file.
You can also use /unpack/all to get back the text and metadata from the container file. If you want the text and metadata from all embedded files, consider using the /rmeta end point.
Default return type is ZIP (without internal compression). Use "Accept" header for TAR return type.
Some example calls with cURL:
PUT zip file and get back met file zip
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$ curl -X PUT --data-binary @foo.zip http://localhost:9998/unpack --header "Content-type: application/zip"
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PUT doc file and get back met file tar
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$ curl -T Doc1_ole.doc -H "Accept: application/x-tar" http://localhost:9998/unpack > /var/tmp/x.tar
|
PUT doc file and get back the content and metadata
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$ curl -T Doc1_ole.doc http://localhost:9998/unpack/all > /var/tmp/x.zip
|
Text is stored in TEXT
file, metadata cvs in METADATA
. Use "accept" header if you want TAR output.
Information Services
Available Endpoints
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/
|
Hitting the route of the server in your web browser will give a basic report of all the endpoints defined in the server, what URL they have etc
Defined Mime Types
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/mime-types
|
Mime types, their aliases, their supertype, and the parser. Available as plain text, json or human readable HTML
Available Detectors
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/detectors
|
The top level Detector to be used, and any child detectors within it. Available as plain text, json or human readable HTML
Available Parsers
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/parsers
|
Lists all of the parsers currently available
No Format |
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/parsers/details
|
List all the available parsers, along with what mimetypes they support
Specifying a URL Instead of Putting Bytes
In Tika 1.10, we removed this capability because it posed a security vulnerability (CVE-2015-3271). Anyone with access to the service had the server's access rights; someone could request local files via file:///
or pages from an intranet that they might not otherwise have access to.
In Tika 1.14, we added the capability back, but the user has to acknowledge the security risk by including two commandline arguments:
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$ java -jar tika-server-x.x.jar -enableUnsecureFeatures -enableFileUrl
|
This allows the user to specify a fileUrl
in the header:
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curl -i -H "fileUrl:http://tika.apache.org" -H "Accept:text/plain" -X PUT http://localhost:9998/tika
|
or
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curl -i -H "fileUrl:file:///C:/data/my_test_doc.pdf" -H "Accept:text/plain" -X PUT http://localhost:9998/tika
|
By adding back this capability, we did not remove the security vulnerability. Rather, if a user is confident that only authorized clients are able to submit a request, the user can choose to operate tika-server with this insecure setting. BE CAREFUL!
Also, please be polite. This feature was added as a convenience. Please consider using a robust crawler (instead of our simple TikaInputStream.get(new URL(fileUrl))
) that will allow for better configuration of redirects, timeouts, cookies, etc.; and a robust crawler will respect robots.txt!
Making Tika Server Robust to OOMs, Infinite Loops and Memory Leaks
As of Tika 1.19, users can make tika-server more robust by running it with the -spawnChild
option. This starts tika-server in a child process, and if there's an OOM, a timeout or other catastrophic problem with the child process, the parent process will kill and/or restart the child process.
The following options are available only with the -spawnChild
option.
-maxFiles
: restart the child process after it has processedmaxFiles
. If there is a slow building memory leak, this restart of the JVM should help. The default is 100,000 files. To turn off this feature:-maxFiles -1
. The child and/or parent will log the cause of the restart asHIT_MAX
when there is a restart because of this threshold.-taskTimeoutMillis
and-taskPulseMillis
:taskPulseMillis
specifies how often to check to determine if a parse/detect task has timed outtaskTimeoutMillis
-pingTimeoutMillis
and-pingPulseMillis
:pingPulseMillis
specifies how often for the parent process to ping the child process to check status.pingTimeoutMillis
how long the parent process should wait to hear back from the child process before restarting it and/or how long the child process should wait to receive a ping from the parent process before shutting itself down.
If the child process is in the process of shutting down, and it gets a new request it will return 503 -- Service Unavailable
. If the server times out on a file, the client will receive an IOException from the closed socket. Note that all other files that are being processed will end with an IOException from a closed socket when the child process shuts down; e.g. if you send three files to tika-server concurrently, and one of them causes a catastrophic problem requiring the child to shut down, you won't be able to tell which file caused the problems. In the future, we may implement a gentler shutdown than we currently have.
NOTE 1: to specify the JVM args for the child process, prepend the arguments with -J
as in -JXmx4g
after the -jar tika-server.x.x.jar
call as in:
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$ java -Dlog4j.configuration=file:log4j_server.xml -jar tika-server-x.x.jar -spawnChild -JXmx4g -JDlog4j.configuration=file:log4j_child.xml}}
|
NOTE 2: When using the -spawnChild
option, clients will need to be aware that the server could be unavailable temporarily while it is restarting. Clients will need to have a retry logic.
Logging
You can customize logging via the usual log4j
commandline argument, e.g. -Dlog4j.configuration=file:log4j_server.xml
. If using -spawnChild
, specify the configuration for the child process with the -J
prepended as in java -jar tika-server-X.Y-jar -spawnChild -JDlog4j.configuration=file:log4j_server.xml
. Some important notes for logging in the child process in versions <= 1.19.1: 1) make sure that the debug
option is off, and 2) do not log to stdout (this is used for interprocess communication between the parent and child!).
NOTE: In Tika 2.0, the writeLimit applies to the full document including the embedded files, not to each handler.
Filtering Metadata Keys
The /rmeta
endpoint can return far more metadata fields than a user might want to process. As of Tika 1.25, users can configure a MetadataFilter that either includes
or excludes
fields by name.
Note: the MetadataFilters
only work with the /rmeta
endpoint. Further, they do not shortcut metadata extraction within Parsers. They only delete the unwanted fields after the parse. This still can save resources in storage and network bandwidth.
A user can map Tika field names to names they prefer. If excludeUnmapped
is set to true, only those fields that are included in the mapping are passed back to the client.
Code Block | ||||
---|---|---|---|---|
| ||||
<properties>
<metadataFilters>
<metadataFilter class="org.apache.tika.metadata.filter.FieldNameMappingFilter">
<params>
<excludeUnmapped>true</excludeUnmapped>
<mappings>
<mapping from="X-TIKA:content" to="content"/>
<mapping from="a" to="b"/>
</mappings>
</params>
</metadataFilter>
</metadataFilters>
</properties> |
A user can set the following in a tika-config.xml
file to have the /rmeta
end point only return three fields:
Code Block | ||||
---|---|---|---|---|
| ||||
<properties>
<metadataFilters>
<metadataFilter class="org.apache.tika.metadata.filter.IncludeFieldMetadataFilter">
<params>
<include>
<field>X-TIKA:content</include>
<field>extended-properties:Application</include>
<field>Content-Type</include>
</param>
</params>
</metadataFilter>
</metadataFilters>
</properties> |
To exclude those three fields but include all other fields:
Code Block | ||||
---|---|---|---|---|
| ||||
<properties>
<metadataFilters>
<metadataFilter class="org.apache.tika.metadata.filter.ExcludeFieldMetadataFilter">
<params>
<exclude>
<field>X-TIKA:content</field>
<field>extended-properties:Application</field>
<field>Content-Type</field>
</param>
</params>
</metadataFilter>
</metadataFilters>
</properties> |
Filtering Metadata Objects
A user may want to parse a file type to get at the embedded contents within it, but s/he may not want a metadata object or contents for the file type itself. For example, image/emf
files often contain duplicative text, but they may contain an embedded PDF file. If the client had turned off the EMFParser
, the embedded PDF file would not be parsed. When the /rmeta
endpoint is configured with the following, it will delete the entire metadata object for files of type image/emf
.
Code Block | ||||
---|---|---|---|---|
| ||||
<properties>
<metadataFilters>
<metadataFilter class="org.apache.tika.metadata.filter.ClearByMimeMetadataFilter">
<params>
<mimes>
<mime>image/emf</mime>
</mimes>
</params>
</metadataFilter>
</metadataFilters>
</properties> |
Integration with tika-eval
As of Tika 1.25, if a user adds the tika-eval
jar to the server jar's classpath, the /rmeta
endpoint will add key "profiling" statistics from the tika-eval
module, including: language identified, number of tokens, number of alphabetic tokens and the "out of vocabulary" percentage. These statistics can be used to decide to reprocess a file with OCR or to reprocess an HTML file with a different encoding detector.
To accomplish this, one may put both the tika-eval jar and the server jar in a bin/
directory and then run:
No Format |
---|
java -cp bin/* org.apache.tika.server.TikaServerCli |
See the TikaEval page for more details. Please open issues on our JIRA if you would like other statistics included or if you'd like to make the calculated statistics configurable.
Unpack Resource
No Format |
---|
/unpack
|
HTTP PUTs an embedded document type to the /unpack service and you get back a zip or tar of the raw bytes of the embedded files. Note that this does not operate recursively; it extracts only the child documents of the original file.
You can also use /unpack/all to get back the text and metadata from the container file. If you want the text and metadata from all embedded files, consider using the /rmeta end point.
Default return type is ZIP (without internal compression). Use "Accept" header for TAR return type.
Some example calls with cURL:
PUT zip file and get back met file zip
No Format |
---|
$ curl -X PUT --data-binary @foo.zip http://localhost:9998/unpack --header "Content-type: application/zip"
|
PUT doc file and get back met file tar
No Format |
---|
$ curl -T Doc1_ole.doc -H "Accept: application/x-tar" http://localhost:9998/unpack > /var/tmp/x.tar
|
PUT doc file and get back the content and metadata
No Format |
---|
$ curl -T Doc1_ole.doc http://localhost:9998/unpack/all > /var/tmp/x.zip
|
Text is stored in TEXT
file, metadata cvs in METADATA
. Use "accept" header if you want TAR output.
PUT zip file and get back met file zip and bump max attachment size from default 100MB to custom 1GB
This is available in tika-server versions greater than 2.8.0.
No Format |
---|
$ curl -X PUT --data-binary @foo.zip http://localhost:9998/unpack --header "Content-type: application/zip" --header "unpackMaxBytes: 1073741824" |
Information Services
Available Endpoints
No Format |
---|
/
|
Hitting the route of the server in your web browser will give a basic report of all the endpoints defined in the server, what URL they have etc
Defined Mime Types
No Format |
---|
/mime-types
|
Mime types, their aliases, their supertype, and the parser. Available as plain text, json or human readable HTML
Available Detectors
No Format |
---|
/detectors
|
The top level Detector to be used, and any child detectors within it. Available as plain text, json or human readable HTML
Available Parsers
No Format |
---|
/parsers
|
Lists all of the parsers currently available
No Format |
---|
/parsers/details
|
List all the available parsers, along with what mimetypes they support
Specifying a URL Instead of Putting Bytes in Tika >= 2.x
In Tika 2.x, use a FileSystemFetcher, a UrlFetcher or or an HttpFetcher. See: tika-pipes (FetchersInClassicServerEndpoints)
We have entirely removed the -enableFileUrl
capability that we had in 1.x because it posed a security threat.
Transfer-Layer Compression
As of Tika 1.24.1, users can turn on gzip
compression for either files on their way to tika-server
or the output from tika-server
.
If you want to gzip
your files before sending to tika-server
, add
No Format |
---|
curl -T test_my_doc.pdf -H "Content-Encoding: gzip" http://localhost:9998/rmeta |
If you want tika-server
to compress the output of the parse:
No Format |
---|
curl -T test_my_doc.pdf -H "Accept-Encoding: gzip" http://localhost:9998/rmeta |
Making Legacy Tika Server Endpoints Robust to OOMs, Infinite Loops and Memory Leaks in Tika >= 2.x
As of Tika 2.x, the default behavior is that the main code forks the server process to handle parsing. If there's an OOM or a timeout or other crash during the parse, the forked process will shutdown and restart.
If the child process is in the process of shutting down, and it gets a new request it will return 503 -- Service Unavailable
. If the server times out on a file, the client will receive an IOException from the closed socket. Note that all other files that are being processed will end with an IOException from a closed socket when the child process shuts down; e.g. if you send three files to tika-server concurrently, and one of them causes a catastrophic problem requiring the child to shut down, you won't be able to tell which file caused the problems. In the future, we may implement a gentler shutdown than we currently have.
To turn off this behavior and to go back to the more dangerous Tika 1.x legacy behavior, configure tika-server with the <noFork>true</noFork>
or add --noFork
as the commandline argument.
NOTE: As mentioned above, clients will need to be aware that the server could be unavailable temporarily while it is restarting. Clients will need to have a retry logic.
Making Tika Server Robust to OOMs, Infinite Loops etc. with the tika-pipes handlers
There are two handlers (/pipes
and /async
) that use the tika-pipes framework that was added in Tika 2.x. These run the parses, a single file at a time, in forked processes so that the tika-server is always "up" even when a parser strikes catastrophe. See tika-pipes.
Logging
In Tika 1.x, you can customize logging via the usual log4j
commandline argument, e.g. -Dlog4j.configuration=file:log4j_server.xml
. If using -spawnChild
, specify the configuration for the child process with the -J
prepended as in java -jar tika-server-X.Y-jar -spawnChild -JDlog4j.configuration=file:log4j_server.xml
. Some important notes for logging in the child process in versions <= 1.19.1: 1) make sure that the debug
option is off, and 2) do not log to stdout (this is used for interprocess communication between the parent and child!).
The default level of logging is debug
, but you can also set logging to info
via the commandline: -log info
.
In Tika 2.x, you can set log4j2.xml configuration for the forked process in the <jvmArgs/> element. See below.
Monitoring
ServerStatus
Tika Server uses ServerStatus object to maintain and track current status of server. The data can be exported to REST resource and JMX MBean (from 1.26).
To enable REST endpoint and JMX MBean:
No Format |
---|
java -jar tika-server-x.x.jar -status |
REST resource to access server status:
No Format |
---|
/status
|
MBean:
Object name: org.apache.tika.server.mbean:type=basic,name=ServerStatusExporter
NOTE: In Tika 2.x, this endpoint is enabled by either enablingUnsecureFeatures
or by specifying it as an endpoint.
No Format |
---|
<properties>
<server>
<params>
<enableUnsecureFeatures>true</enableUnsecureFeatures>
</params>
</server>
</properties> |
No Format |
---|
<properties>
<server>
<params>
<port>9999</port>
<forkedJvmArgs>
<arg>-Xmx2g</arg>
<arg>-Dlog4j.configurationFile=my-forked-log4j2.xml</arg>
</forkedJvmArgs>
<endpoints>
<endpoint>status</endpoint>
<endpoint>rmeta</endpoint>
</endpoints>
</params>
</server>
</properties> |
SSL (Beta)
Tika Server now has the ability to be spawned with SSL enabled by providing a keystore/Truststore as part of the configuration, this is likely to change but is available as part of Tika 2.4.0.
Example:
Code Block |
---|
<properties>
<server>
<params>
<port>9999</port>
<forkedJvmArgs>
<arg>-Xmx2g</arg>
</forkedJvmArgs>
<endpoints>
<endpoint>rmeta</endpoint>
</endpoints>
</params>
<tlsConfig>
<params>
<active>true</active>
<keyStoreType>myType</keyStoreType>
<keyStorePassword>pass</keyStorePassword>
<keyStoreFile>/something/or/other</keyStoreFile>
<trustStoreType>myType2</trustStoreType>
<trustStorePassword>pass2</trustStorePassword>
<trustStoreFile>/something/or/other2</trustStoreFile>
</params>
</tlsConfig>
</server>
</properties> |
If you are new to TLS, see our README.txt for how we generated client and server keystores and truststores for our unit tests.
Configuring Parsers at Parse time/per file
See Configuring Parsers At Parse Time in tika-serverThe default level of logging is debug
, but you can also set logging to info
via the commandline: -log info
.
Architecture
Tika Server is based on JSR 311 for a network serve. The server package uses the Apache CXF framework that provides an implementation of JAX-RS for Java.