Chapter 165. Jetty 9 Component

Available as of Camel version 1.2

Warning

The producer is deprecated - do not use. We only recommend using jetty as consumer (eg from jetty)

The jetty component provides HTTP-based endpoints for consuming and producing HTTP requests. That is, the Jetty component behaves as a simple Web server.
Jetty can also be used as a http client which mean you can also use it with Camel as a producer.

Stream

The assert call appears in this example, because the code is part of an unit test.Jetty is stream based, which means the input it receives is submitted to Camel as a stream. That means you will only be able to read the content of the stream once.
If you find a situation where the message body appears to be empty or you need to access the Exchange.HTTP_RESPONSE_CODE data multiple times (e.g.: doing multicasting, or redelivery error handling), you should use Stream caching or convert the message body to a String which is safe to be re-read multiple times.

Maven users will need to add the following dependency to their pom.xml for this component:

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-jetty</artifactId>
    <version>x.x.x</version>
    <!-- use the same version as your Camel core version -->
</dependency>

165.1. URI format

jetty:http://hostname[:port][/resourceUri][?options]

You can append query options to the URI in the following format, ?option=value&option=value&…​

165.2. Options

The Jetty 9 component supports 33 options which are listed below.

NameDescriptionDefaultType

sslKeyPassword (security)

The key password, which is used to access the certificate’s key entry in the keystore (this is the same password that is supplied to the keystore command’s -keypass option).

 

String

sslPassword (security)

The ssl password, which is required to access the keystore file (this is the same password that is supplied to the keystore command’s -storepass option).

 

String

keystore (security)

Specifies the location of the Java keystore file, which contains the Jetty server’s own X.509 certificate in a key entry.

 

String

errorHandler (advanced)

This option is used to set the ErrorHandler that Jetty server uses.

 

ErrorHandler

sslSocketConnectors (security)

A map which contains per port number specific SSL connectors.

 

Map

socketConnectors (security)

A map which contains per port number specific HTTP connectors. Uses the same principle as sslSocketConnectors.

 

Map

httpClientMinThreads (producer)

To set a value for minimum number of threads in HttpClient thread pool. Notice that both a min and max size must be configured.

 

Integer

httpClientMaxThreads (producer)

To set a value for maximum number of threads in HttpClient thread pool. Notice that both a min and max size must be configured.

 

Integer

minThreads (consumer)

To set a value for minimum number of threads in server thread pool. Notice that both a min and max size must be configured.

 

Integer

maxThreads (consumer)

To set a value for maximum number of threads in server thread pool. Notice that both a min and max size must be configured.

 

Integer

threadPool (consumer)

To use a custom thread pool for the server. This option should only be used in special circumstances.

 

ThreadPool

enableJmx (common)

If this option is true, Jetty JMX support will be enabled for this endpoint.

false

boolean

jettyHttpBinding (advanced)

To use a custom org.apache.camel.component.jetty.JettyHttpBinding, which are used to customize how a response should be written for the producer.

 

JettyHttpBinding

httpBinding (advanced)

Not to be used - use JettyHttpBinding instead.

 

HttpBinding

httpConfiguration (advanced)

Jetty component does not use HttpConfiguration.

 

HttpConfiguration

mbContainer (advanced)

To use a existing configured org.eclipse.jetty.jmx.MBeanContainer if JMX is enabled that Jetty uses for registering mbeans.

 

MBeanContainer

sslSocketConnector Properties (security)

A map which contains general SSL connector properties.

 

Map

socketConnector Properties (security)

A map which contains general HTTP connector properties. Uses the same principle as sslSocketConnectorProperties.

 

Map

continuationTimeout (consumer)

Allows to set a timeout in millis when using Jetty as consumer (server). By default Jetty uses 30000. You can use a value of = 0 to never expire. If a timeout occurs then the request will be expired and Jetty will return back a http error 503 to the client. This option is only in use when using Jetty with the Asynchronous Routing Engine.

30000

Long

useContinuation (consumer)

Whether or not to use Jetty continuations for the Jetty Server.

true

boolean

sslContextParameters (security)

To configure security using SSLContextParameters

 

SSLContextParameters

useGlobalSslContext Parameters (security)

Enable usage of global SSL context parameters

false

boolean

responseBufferSize (common)

Allows to configure a custom value of the response buffer size on the Jetty connectors.

 

Integer

requestBufferSize (common)

Allows to configure a custom value of the request buffer size on the Jetty connectors.

 

Integer

requestHeaderSize (common)

Allows to configure a custom value of the request header size on the Jetty connectors.

 

Integer

responseHeaderSize (common)

Allows to configure a custom value of the response header size on the Jetty connectors.

 

Integer

proxyHost (proxy)

To use a http proxy to configure the hostname.

 

String

proxyPort (proxy)

To use a http proxy to configure the port number.

 

Integer

useXForwardedFor Header (common)

To use the X-Forwarded-For header in HttpServletRequest.getRemoteAddr.

false

boolean

sendServerVersion (consumer)

If the option is true, jetty server will send the date header to the client which sends the request. NOTE please make sure there is no any other camel-jetty endpoint is share the same port, otherwise this option may not work as expected.

true

boolean

allowJavaSerialized Object (advanced)

Whether to allow java serialization when a request uses context-type=application/x-java-serialized-object. This is by default turned off. If you enable this then be aware that Java will deserialize the incoming data from the request to Java and that can be a potential security risk.

false

boolean

headerFilterStrategy (filter)

To use a custom org.apache.camel.spi.HeaderFilterStrategy to filter header to and from Camel message.

 

HeaderFilterStrategy

resolveProperty Placeholders (advanced)

Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders.

true

boolean

The Jetty 9 endpoint is configured using URI syntax:

jetty:httpUri

with the following path and query parameters:

165.2.1. Path Parameters (1 parameters):

NameDescriptionDefaultType

httpUri

Required The url of the HTTP endpoint to call.

 

URI

165.2.2. Query Parameters (54 parameters):

NameDescriptionDefaultType

chunked (common)

If this option is false the Servlet will disable the HTTP streaming and set the content-length header on the response

true

boolean

disableStreamCache (common)

Determines whether or not the raw input stream from Servlet is cached or not (Camel will read the stream into a in memory/overflow to file, Stream caching) cache. By default Camel will cache the Servlet input stream to support reading it multiple times to ensure it Camel can retrieve all data from the stream. However you can set this option to true when you for example need to access the raw stream, such as streaming it directly to a file or other persistent store. DefaultHttpBinding will copy the request input stream into a stream cache and put it into message body if this option is false to support reading the stream multiple times. If you use Servlet to bridge/proxy an endpoint then consider enabling this option to improve performance, in case you do not need to read the message payload multiple times. The http/http4 producer will by default cache the response body stream. If setting this option to true, then the producers will not cache the response body stream but use the response stream as-is as the message body.

false

boolean

enableMultipartFilter (common)

Whether Jetty org.eclipse.jetty.servlets.MultiPartFilter is enabled or not. You should set this value to false when bridging endpoints, to ensure multipart requests is proxied/bridged as well.

false

boolean

headerFilterStrategy (common)

To use a custom HeaderFilterStrategy to filter header to and from Camel message.

 

HeaderFilterStrategy

transferException (common)

If enabled and an Exchange failed processing on the consumer side, and if the caused Exception was send back serialized in the response as a application/x-java-serialized-object content type. On the producer side the exception will be deserialized and thrown as is, instead of the HttpOperationFailedException. The caused exception is required to be serialized. This is by default turned off. If you enable this then be aware that Java will deserialize the incoming data from the request to Java and that can be a potential security risk.

false

boolean

httpBinding (common)

To use a custom HttpBinding to control the mapping between Camel message and HttpClient.

 

HttpBinding

async (consumer)

Configure the consumer to work in async mode

false

boolean

bridgeErrorHandler (consumer)

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

boolean

continuationTimeout (consumer)

Allows to set a timeout in millis when using Jetty as consumer (server). By default Jetty uses 30000. You can use a value of = 0 to never expire. If a timeout occurs then the request will be expired and Jetty will return back a http error 503 to the client. This option is only in use when using Jetty with the Asynchronous Routing Engine.

30000

Long

enableCORS (consumer)

If the option is true, Jetty server will setup the CrossOriginFilter which supports the CORS out of box.

false

boolean

enableJmx (consumer)

If this option is true, Jetty JMX support will be enabled for this endpoint. See Jetty JMX support for more details.

false

boolean

httpMethodRestrict (consumer)

Used to only allow consuming if the HttpMethod matches, such as GET/POST/PUT etc. Multiple methods can be specified separated by comma.

 

String

matchOnUriPrefix (consumer)

Whether or not the consumer should try to find a target consumer by matching the URI prefix if no exact match is found.

false

boolean

responseBufferSize (consumer)

To use a custom buffer size on the javax.servlet.ServletResponse.

 

Integer

sendDateHeader (consumer)

If the option is true, jetty server will send the date header to the client which sends the request. NOTE please make sure there is no any other camel-jetty endpoint is share the same port, otherwise this option may not work as expected.

false

boolean

sendServerVersion (consumer)

If the option is true, jetty will send the server header with the jetty version information to the client which sends the request. NOTE please make sure there is no any other camel-jetty endpoint is share the same port, otherwise this option may not work as expected.

true

boolean

sessionSupport (consumer)

Specifies whether to enable the session manager on the server side of Jetty.

false

boolean

useContinuation (consumer)

Whether or not to use Jetty continuations for the Jetty Server.

 

Boolean

eagerCheckContentAvailable (consumer)

Whether to eager check whether the HTTP requests has content if the content-length header is 0 or not present. This can be turned on in case HTTP clients do not send streamed data.

false

boolean

exceptionHandler (consumer)

To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this options is not in use. By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored.

 

ExceptionHandler

exchangePattern (consumer)

Sets the exchange pattern when the consumer creates an exchange.

 

ExchangePattern

filterInitParameters (consumer)

Configuration of the filter init parameters. These parameters will be applied to the filter list before starting the jetty server.

 

Map

filtersRef (consumer)

Allows using a custom filters which is putted into a list and can be find in the Registry. Multiple values can be separated by comma.

 

String

handlers (consumer)

Specifies a comma-delimited set of Handler instances to lookup in your Registry. These handlers are added to the Jetty servlet context (for example, to add security). Important: You can not use different handlers with different Jetty endpoints using the same port number. The handlers is associated to the port number. If you need different handlers, then use different port numbers.

 

String

httpBindingRef (consumer)

Deprecated Option to disable throwing the HttpOperationFailedException in case of failed responses from the remote server. This allows you to get all responses regardless of the HTTP status code.

 

String

multipartFilter (consumer)

Allows using a custom multipart filter. Note: setting multipartFilterRef forces the value of enableMultipartFilter to true.

 

Filter

multipartFilterRef (consumer)

Deprecated Allows using a custom multipart filter. Note: setting multipartFilterRef forces the value of enableMultipartFilter to true.

 

String

optionsEnabled (consumer)

Specifies whether to enable HTTP OPTIONS for this Servlet consumer. By default OPTIONS is turned off.

false

boolean

traceEnabled (consumer)

Specifies whether to enable HTTP TRACE for this Servlet consumer. By default TRACE is turned off.

false

boolean

bridgeEndpoint (producer)

If the option is true, HttpProducer will ignore the Exchange.HTTP_URI header, and use the endpoint’s URI for request. You may also set the option throwExceptionOnFailure to be false to let the HttpProducer send all the fault response back.

false

boolean

connectionClose (producer)

Specifies whether a Connection Close header must be added to HTTP Request. By default connectionClose is false.

false

boolean

cookieHandler (producer)

Configure a cookie handler to maintain a HTTP session

 

CookieHandler

copyHeaders (producer)

If this option is true then IN exchange headers will be copied to OUT exchange headers according to copy strategy. Setting this to false, allows to only include the headers from the HTTP response (not propagating IN headers).

true

boolean

httpClientMaxThreads (producer)

To set a value for maximum number of threads in HttpClient thread pool. This setting override any setting configured on component level. Notice that both a min and max size must be configured. If not set it default to max 254 threads used in Jettys thread pool.

254

Integer

httpClientMinThreads (producer)

To set a value for minimum number of threads in HttpClient thread pool. This setting override any setting configured on component level. Notice that both a min and max size must be configured. If not set it default to min 8 threads used in Jettys thread pool.

8

Integer

httpMethod (producer)

Configure the HTTP method to use. The HttpMethod header cannot override this option if set.

 

HttpMethods

ignoreResponseBody (producer)

If this option is true, The http producer won’t read response body and cache the input stream

false

boolean

preserveHostHeader (producer)

If the option is true, HttpProducer will set the Host header to the value contained in the current exchange Host header, useful in reverse proxy applications where you want the Host header received by the downstream server to reflect the URL called by the upstream client, this allows applications which use the Host header to generate accurate URL’s for a proxied service

false

boolean

throwExceptionOnFailure (producer)

Option to disable throwing the HttpOperationFailedException in case of failed responses from the remote server. This allows you to get all responses regardless of the HTTP status code.

true

boolean

httpClient (producer)

Sets a shared HttpClient to use for all producers created by this endpoint. By default each producer will use a new http client, and not share. Important: Make sure to handle the lifecycle of the shared client, such as stopping the client, when it is no longer in use. Camel will call the start method on the client to ensure its started when this endpoint creates a producer. This options should only be used in special circumstances.

 

HttpClient

httpClientParameters (producer)

Configuration of Jetty’s HttpClient. For example, setting httpClient.idleTimeout=30000 sets the idle timeout to 30 seconds. And httpClient.timeout=30000 sets the request timeout to 30 seconds, in case you want to timeout sooner if you have long running request/response calls.

 

Map

jettyBinding (producer)

To use a custom JettyHttpBinding which be used to customize how a response should be written for the producer.

 

JettyHttpBinding

jettyBindingRef (producer)

Deprecated To use a custom JettyHttpBinding which be used to customize how a response should be written for the producer.

 

String

okStatusCodeRange (producer)

The status codes which are considered a success response. The values are inclusive. Multiple ranges can be defined, separated by comma, e.g. 200-204,209,301-304. Each range must be a single number or from-to with the dash included.

200-299

String

urlRewrite (producer)

Deprecated Refers to a custom org.apache.camel.component.http.UrlRewrite which allows you to rewrite urls when you bridge/proxy endpoints. See more details at http://camel.apache.org/urlrewrite.html

 

UrlRewrite

mapHttpMessageBody (advanced)

If this option is true then IN exchange Body of the exchange will be mapped to HTTP body. Setting this to false will avoid the HTTP mapping.

true

boolean

mapHttpMessageFormUrl EncodedBody (advanced)

If this option is true then IN exchange Form Encoded body of the exchange will be mapped to HTTP. Setting this to false will avoid the HTTP Form Encoded body mapping.

true

boolean

mapHttpMessageHeaders (advanced)

If this option is true then IN exchange Headers of the exchange will be mapped to HTTP headers. Setting this to false will avoid the HTTP Headers mapping.

true

boolean

synchronous (advanced)

Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported).

false

boolean

proxyAuthScheme (proxy)

Proxy authentication scheme to use

 

String

proxyHost (proxy)

Proxy hostname to use

 

String

proxyPort (proxy)

Proxy port to use

 

int

authHost (security)

Authentication host to use with NTML

 

String

sslContextParameters (security)

To configure security using SSLContextParameters

 

SSLContextParameters

165.3. Message Headers

Camel uses the same message headers as the HTTP component. From Camel 2.2, it also uses (Exchange.HTTP_CHUNKED,CamelHttpChunked) header to turn on or turn off the chuched encoding on the camel-jetty consumer.

Camel also populates all request.parameter and request.headers. For example, given a client request with the URL, http://myserver/myserver?orderid=123, the exchange will contain a header named orderid with the value 123.

Starting with Camel 2.2.0, you can get the request.parameter from the message header not only from Get Method, but also other HTTP method.

165.4. Usage

The Jetty component supports both consumer and producer endpoints. Another option for producing to other HTTP endpoints, is to use the HTTP Component

165.5. Producer Example

Warning

The producer is deprecated - do not use. We only recommend using jetty as consumer (eg from jetty)

The following is a basic example of how to send an HTTP request to an existing HTTP endpoint.

in Java DSL

from("direct:start").to("jetty://http://www.google.com");

or in Spring XML

<route>
    <from uri="direct:start"/>
    <to uri="jetty://http://www.google.com"/>
<route>

165.6. Consumer Example

In this sample we define a route that exposes a HTTP service at http://localhost:8080/myapp/myservice:

Usage of localhost

When you specify localhost in a URL, Camel exposes the endpoint only on the local TCP/IP network interface, so it cannot be accessed from outside the machine it operates on.

If you need to expose a Jetty endpoint on a specific network interface, the numerical IP address of this interface should be used as the host. If you need to expose a Jetty endpoint on all network interfaces, the 0.0.0.0 address should be used.

To listen across an entire URI prefix, see How do I let Jetty match wildcards.

If you actually want to expose routes by HTTP and already have a Servlet, you should instead refer to the Servlet Transport.

Our business logic is implemented in the MyBookService class, which accesses the HTTP request contents and then returns a response.
Note: The assert call appears in this example, because the code is part of an unit test.

The following sample shows a content-based route that routes all requests containing the URI parameter, one, to the endpoint, mock:one, and all others to mock:other.

So if a client sends the HTTP request, http://serverUri?one=hello, the Jetty component will copy the HTTP request parameter, one to the exchange’s in.header. We can then use the simple language to route exchanges that contain this header to a specific endpoint and all others to another. If we used a language more powerful than Simple (such as OGNL) we could also test for the parameter value and do routing based on the header value as well.

165.7. Session Support

The session support option, sessionSupport, can be used to enable a HttpSession object and access the session object while processing the exchange. For example, the following route enables sessions:

<route>
    <from uri="jetty:http://0.0.0.0/myapp/myservice/?sessionSupport=true"/>
    <processRef ref="myCode"/>
<route>

The myCode Processor can be instantiated by a Spring bean element:

<bean id="myCode"class="com.mycompany.MyCodeProcessor"/>

Where the processor implementation can access the HttpSession as follows:

public void process(Exchange exchange) throws Exception {
    HttpSession session = exchange.getIn(HttpMessage.class).getRequest().getSession();
    ...
}

165.8. SSL Support (HTTPS)

Using the JSSE Configuration Utility

As of Camel 2.8, the Jetty component supports SSL/TLS configuration through the Camel JSSE Configuration Utility.  This utility greatly decreases the amount of component specific code you need to write and is configurable at the endpoint and component levels.  The following examples demonstrate how to use the utility with the Jetty component.

Programmatic configuration of the component

KeyStoreParameters ksp = new KeyStoreParameters();
ksp.setResource("/users/home/server/keystore.jks");
ksp.setPassword("keystorePassword");

KeyManagersParameters kmp = new KeyManagersParameters();
kmp.setKeyStore(ksp);
kmp.setKeyPassword("keyPassword");

SSLContextParameters scp = new SSLContextParameters();
scp.setKeyManagers(kmp);

JettyComponent jettyComponent = getContext().getComponent("jetty", JettyComponent.class);
jettyComponent.setSslContextParameters(scp);

Spring DSL based configuration of endpoint

...
  <camel:sslContextParameters
      id="sslContextParameters">
    <camel:keyManagers
        keyPassword="keyPassword">
      <camel:keyStore
          resource="/users/home/server/keystore.jks"
          password="keystorePassword"/>
    </camel:keyManagers>
  </camel:sslContextParameters>...
...
  <to uri="jetty:https://127.0.0.1/mail/?sslContextParameters=#sslContextParameters"/>
...

Configuring Jetty Directly

Jetty provides SSL support out of the box. To enable Jetty to run in SSL mode, simply format the URI with the https:// prefix---for example:

<from uri="jetty:https://0.0.0.0/myapp/myservice/"/>

Jetty also needs to know where to load your keystore from and what passwords to use in order to load the correct SSL certificate. Set the following JVM System Properties:

until Camel 2.2

  • jetty.ssl.keystore specifies the location of the Java keystore file, which contains the Jetty server’s own X.509 certificate in a key entry. A key entry stores the X.509 certificate (effectively, the public key) and also its associated private key.
  • jetty.ssl.password the store password, which is required to access the keystore file (this is the same password that is supplied to the keystore command’s -storepass option).
  • jetty.ssl.keypassword the key password, which is used to access the certificate’s key entry in the keystore (this is the same password that is supplied to the keystore command’s -keypass option).

from Camel 2.3 onwards

  • org.eclipse.jetty.ssl.keystore specifies the location of the Java keystore file, which contains the Jetty server’s own X.509 certificate in a key entry. A key entry stores the X.509 certificate (effectively, the public key) and also its associated private key.
  • org.eclipse.jetty.ssl.password the store password, which is required to access the keystore file (this is the same password that is supplied to the keystore command’s -storepass option).
  • org.eclipse.jetty.ssl.keypassword the key password, which is used to access the certificate’s key entry in the keystore (this is the same password that is supplied to the keystore command’s -keypass option).

For details of how to configure SSL on a Jetty endpoint, read the following documentation at the Jetty Site: http://docs.codehaus.org/display/JETTY/How+to+configure+SSL

Some SSL properties aren’t exposed directly by Camel, however Camel does expose the underlying SslSocketConnector, which will allow you to set properties like needClientAuth for mutual authentication requiring a client certificate or wantClientAuth for mutual authentication where a client doesn’t need a certificate but can have one. There’s a slight difference between the various Camel versions:

Up to Camel 2.2

<bean id="jetty" class="org.apache.camel.component.jetty.JettyHttpComponent">
    <property name="sslSocketConnectors">
        <map>
            <entry key="8043">
                <bean class="org.mortbay.jetty.security.SslSocketConnector">
                    <property name="password"value="..."/>
                    <property name="keyPassword"value="..."/>
                    <property name="keystore"value="..."/>
                    <property name="needClientAuth"value="..."/>
                    <property name="truststore"value="..."/>
                </bean>
            </entry>
        </map>
    </property>
</bean>

Camel 2.3, 2.4

<bean id="jetty" class="org.apache.camel.component.jetty.JettyHttpComponent">
    <property name="sslSocketConnectors">
        <map>
            <entry key="8043">
                <bean class="org.eclipse.jetty.server.ssl.SslSocketConnector">
                    <property name="password"value="..."/>
                    <property name="keyPassword"value="..."/>
                    <property name="keystore"value="..."/>
                    <property name="needClientAuth"value="..."/>
                    <property name="truststore"value="..."/>
                </bean>
            </entry>
        </map>
    </property>
</bean>

*From Camel 2.5 we switch to use SslSelectChannelConnector *

<bean id="jetty" class="org.apache.camel.component.jetty.JettyHttpComponent">
    <property name="sslSocketConnectors">
        <map>
            <entry key="8043">
                <bean class="org.eclipse.jetty.server.ssl.SslSelectChannelConnector">
                    <property name="password"value="..."/>
                    <property name="keyPassword"value="..."/>
                    <property name="keystore"value="..."/>
                    <property name="needClientAuth"value="..."/>
                    <property name="truststore"value="..."/>
                </bean>
            </entry>
        </map>
    </property>
</bean>

The value you use as keys in the above map is the port you configure Jetty to listen on.

165.8.1. Configuring general SSL properties

Available as of Camel 2.5

Instead of a per port number specific SSL socket connector (as shown above) you can now configure general properties which applies for all SSL socket connectors (which is not explicit configured as above with the port number as entry).

<bean id="jetty" class="org.apache.camel.component.jetty.JettyHttpComponent">
    <property name="sslSocketConnectorProperties">
        <map>
            <entry key="password"value="..."/>
            <entry key="keyPassword"value="..."/>
            <entry key="keystore"value="..."/>
            <entry key="needClientAuth"value="..."/>
            <entry key="truststore"value="..."/>
        </map>
    </property>
</bean>

165.8.2. How to obtain reference to the X509Certificate

Jetty stores a reference to the certificate in the HttpServletRequest which you can access from code as follows:

HttpServletRequest req = exchange.getIn().getBody(HttpServletRequest.class);
X509Certificate cert = (X509Certificate) req.getAttribute("javax.servlet.request.X509Certificate")

165.8.3. Configuring general HTTP properties

Available as of Camel 2.5

Instead of a per port number specific HTTP socket connector (as shown above) you can now configure general properties which applies for all HTTP socket connectors (which is not explicit configured as above with the port number as entry).

<bean id="jetty" class="org.apache.camel.component.jetty.JettyHttpComponent">
    <property name="socketConnectorProperties">
        <map>
            <entry key="acceptors" value="4"/>
            <entry key="maxIdleTime" value="300000"/>
        </map>
    </property>
</bean>

165.8.4. Obtaining X-Forwarded-For header with HttpServletRequest.getRemoteAddr()

If the HTTP requests are handled by an Apache server and forwarded to jetty with mod_proxy, the original client IP address is in the X-Forwarded-For header and the HttpServletRequest.getRemoteAddr() will return the address of the Apache proxy.

Jetty has a forwarded property which takes the value from X-Forwarded-For and places it in the HttpServletRequest remoteAddr property.  This property is not available directly through the endpoint configuration but it can be easily added using the socketConnectors property:

<bean id="jetty" class="org.apache.camel.component.jetty.JettyHttpComponent">
    <property name="socketConnectors">
        <map>
            <entry key="8080">
                <bean class="org.eclipse.jetty.server.nio.SelectChannelConnector">
                    <property name="forwarded" value="true"/>
                </bean>
            </entry>
        </map>
    </property>
</bean>

This is particularly useful when an existing Apache server handles TLS connections for a domain and proxies them to application servers internally.

165.9. Default behavior for returning HTTP status codes

The default behavior of HTTP status codes is defined by the org.apache.camel.component.http.DefaultHttpBinding class, which handles how a response is written and also sets the HTTP status code.

If the exchange was processed successfully, the 200 HTTP status code is returned.
If the exchange failed with an exception, the 500 HTTP status code is returned, and the stacktrace is returned in the body. If you want to specify which HTTP status code to return, set the code in the Exchange.HTTP_RESPONSE_CODE header of the OUT message.

165.10. Customizing HttpBinding

By default, Camel uses the org.apache.camel.component.http.DefaultHttpBinding to handle how a response is written. If you like, you can customize this behavior either by implementing your own HttpBinding class or by extending DefaultHttpBinding and overriding the appropriate methods.

The following example shows how to customize the DefaultHttpBinding in order to change how exceptions are returned:

We can then create an instance of our binding and register it in the Spring registry as follows:

<bean id="mybinding"class="com.mycompany.MyHttpBinding"/>

And then we can reference this binding when we define the route:

<route><from uri="jetty:http://0.0.0.0:8080/myapp/myservice?httpBindingRef=mybinding"/><to uri="bean:doSomething"/></route>

165.11. Jetty handlers and security configuration

You can configure a list of Jetty handlers on the endpoint, which can be useful for enabling advanced Jetty security features. These handlers are configured in Spring XML as follows:

<-- Jetty Security handling -->
<bean id="userRealm" class="org.mortbay.jetty.plus.jaas.JAASUserRealm">
    <property name="name" value="tracker-users"/>
    <property name="loginModuleName" value="ldaploginmodule"/>
</bean>

<bean id="constraint" class="org.mortbay.jetty.security.Constraint">
    <property name="name" value="BASIC"/>
    <property name="roles" value="tracker-users"/>
    <property name="authenticate" value="true"/>
</bean>

<bean id="constraintMapping" class="org.mortbay.jetty.security.ConstraintMapping">
    <property name="constraint" ref="constraint"/>
    <property name="pathSpec" value="/*"/>
</bean>

<bean id="securityHandler" class="org.mortbay.jetty.security.SecurityHandler">
    <property name="userRealm" ref="userRealm"/>
    <property name="constraintMappings" ref="constraintMapping"/>
</bean>

And from Camel 2.3 onwards you can configure a list of Jetty handlers as follows:

<-- Jetty Security handling -->
<bean id="constraint" class="org.eclipse.jetty.http.security.Constraint">
    <property name="name" value="BASIC"/>
    <property name="roles" value="tracker-users"/>
    <property name="authenticate" value="true"/>
</bean>

<bean id="constraintMapping" class="org.eclipse.jetty.security.ConstraintMapping">
    <property name="constraint" ref="constraint"/>
    <property name="pathSpec" value="/*"/>
</bean>

<bean id="securityHandler" class="org.eclipse.jetty.security.ConstraintSecurityHandler">
    <property name="authenticator">
        <bean class="org.eclipse.jetty.security.authentication.BasicAuthenticator"/>
    </property>
    <property name="constraintMappings">
        <list>
            <ref bean="constraintMapping"/>
        </list>
    </property>
</bean>

You can then define the endpoint as:

from("jetty:http://0.0.0.0:9080/myservice?handlers=securityHandler")

If you need more handlers, set the handlers option equal to a comma-separated list of bean IDs.

165.12. How to return a custom HTTP 500 reply message

You may want to return a custom reply message when something goes wrong, instead of the default reply message Camel Jetty replies with.
You could use a custom HttpBinding to be in control of the message mapping, but often it may be easier to use Camel’s Exception Clause to construct the custom reply message. For example as show here, where we return Dude something went wrong with HTTP error code 500:

165.13. Multi-part Form support

From Camel 2.3.0, camel-jetty support to multipart form post out of box. The submitted form-data are mapped into the message header. Camel-jetty creates an attachment for each uploaded file. The file name is mapped to the name of the attachment. The content type is set as the content type of the attachment file name. You can find the example here.

Note: getName() functions as shown below in versions 2.5 and higher. In earlier versions you receive the temporary file name for the attachment instead

165.14. Jetty JMX support

From Camel 2.3.0, camel-jetty supports the enabling of Jetty’s JMX capabilities at the component and endpoint level with the endpoint configuration taking priority. Note that JMX must be enabled within the Camel context in order to enable JMX support in this component as the component provides Jetty with a reference to the MBeanServer registered with the Camel context. Because the camel-jetty component caches and reuses Jetty resources for a given protocol/host/port pairing, this configuration option will only be evaluated during the creation of the first endpoint to use a protocol/host/port pairing. For example, given two routes created from the following XML fragments, JMX support would remain enabled for all endpoints listening on "https://0.0.0.0".

<from uri="jetty:https://0.0.0.0/myapp/myservice1/?enableJmx=true"/>
<from uri="jetty:https://0.0.0.0/myapp/myservice2/?enableJmx=false"/>

The camel-jetty component also provides for direct configuration of the Jetty MBeanContainer. Jetty creates MBean names dynamically. If you are running another instance of Jetty outside of the Camel context and sharing the same MBeanServer between the instances, you can provide both instances with a reference to the same MBeanContainer in order to avoid name collisions when registering Jetty MBeans.

165.15. See Also

  • Configuring Camel
  • Component
  • Endpoint
  • Getting Started
  • HTTP