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Chapter 121. REST

Rest Component
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Available as of Camel 2.14
The REST component allows you to define REST endpoints using the section "Defining Services with REST DSL" in "Apache Camel Development Guide" and to plug in other Camel components as the REST transport.

URI format
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rest://method:path[:uriTemplate]?[options]
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URI Options
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Expand
Name
Default Value
Description
method
HTTP method which should be one of: get, post, put, patch, delete, head, trace, connect, or options.
path
the base path which support REST syntax. See further below for examples.
uriTemplate
uri template which support REST syntax. See further below for examples.
consumes
media type such as: 'text/xml', or 'application/json' this REST service accepts. By default we accept all kinds of types.
produces
media type such as: 'text/xml', or 'application/json' this REST service returns.

Path and uriTemplate syntax
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The path and uriTemplate option is defined using a REST syntax where you define the REST context path using support for parameters.
Tip
If no uriTemplate is configured then path option works the same way. It does not matter if you configure only path or if you configure both options. Though configuring both a path and uriTemplate is a more common practice with REST.
The following is a Camel route using a a path only 
  from("rest:get:hello")
    .transform().constant("Bye World");
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And the following route uses a parameter which is mapped to a Camel header with the key "me". 
  from("rest:get:hello/{me}")
    .transform().simple("Bye ${header.me}");
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The following examples have configured a base path as "hello" and then have two REST services configured using uriTemplates. 
  from("rest:get:hello:/{me}")
    .transform().simple("Hi ${header.me}");
 
  from("rest:get:hello:/french/{me}")
    .transform().simple("Bonjour ${header.me}");
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More examples
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See section "Defining Services with REST DSL" in "Apache Camel Development Guide" which offers more examples and how you can use the Rest DSL to define those in a nicer RESTful way.
There is a camel-example-servlet-rest-tomcat example in the Apache Camel distribution, that demonstrates how to use the section "Defining Services with REST DSL" in "Apache Camel Development Guide" with Chapter 132, SERVLETSERVLET as transport that can be deployed on Apache Tomcat, or similar web containers.
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