Chapter 111. Platform HTTP Since Camel 3.0 Only consumer is supported The Platform HTTP is used to allow Camel to use the existing HTTP server from the runtime, for example when running Camel on Spring Boot, Quarkus, or other runtimes. 111.1. Dependencies When using platform-http with Red Hat build of Camel Spring Boot make sure to use the following Maven dependency to have support for auto configuration: <dependency> <groupId>org.apache.camel.springboot</groupId> <artifactId>camel-platform-http-starter</artifactId> </dependency> 111.2. Platform HTTP Provider To use Platform HTTP a provider (engine) is required to be available on the classpath. The purpose is to have drivers for different runtimes such as Quarkus, VertX, or Spring Boot. At this moment there is only support for Quarkus and VertX by camel-platform-http-vertx . This JAR must be on the classpath otherwise the Platform HTTP component cannot be used and an exception will be thrown on startup. <dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-platform-http-vertx</artifactId> <version>4.8.3.redhat-00004</version> <!-- use the same version as your Camel core version --> </dependency> 111.3. Configuring Options Camel components are configured on two separate levels: component level endpoint level 111.3.1. Configuring Component Options At the component level, you set general and shared configurations that are, then, inherited by the endpoints. It is the highest configuration level. For example, a component may have security settings, credentials for authentication, urls for network connection and so forth. Some components only have a few options, and others may have many. Because components typically have pre-configured defaults that are commonly used, then you may often only need to configure a few options on a component; or none at all. You can configure components using: the Component DSL . in a configuration file (application.properties, *.yaml files, etc). directly in the Java code. 111.3.2. Configuring Endpoint Options You usually spend more time setting up endpoints because they have many options. These options help you customize what you want the endpoint to do. The options are also categorized into whether the endpoint is used as a consumer (from), as a producer (to), or both. Configuring endpoints is most often done directly in the endpoint URI as path and query parameters. You can also use the Endpoint DSL and DataFormat DSL as a type safe way of configuring endpoints and data formats in Java. A good practice when configuring options is to use Property Placeholders . Property placeholders provide a few benefits: They help prevent using hardcoded urls, port numbers, sensitive information, and other settings. They allow externalizing the configuration from the code. They help the code to become more flexible and reusable. The following two sections list all the options, firstly for the component followed by the endpoint. 111.4. Component Options The Platform HTTP component supports 5 options, which are listed below. Name Description Default Type 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 handleWriteResponseError (consumer) When Camel is complete processing the message, and the HTTP server is writing response. This option controls whether Camel should catch any failure during writing response and store this on the Exchange, which allows onCompletion/UnitOfWork to regard the Exchange as failed and have access to the caused exception from the HTTP server. false boolean autowiredEnabled (advanced) Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc. true boolean engine (advanced) An HTTP Server engine implementation to serve the requests. PlatformHttpEngine headerFilterStrategy (filter) To use a custom org.apache.camel.spi.HeaderFilterStrategy to filter header to and from Camel message. HeaderFilterStrategy 111.4.1. Endpoint Options The Platform HTTP endpoint is configured using URI syntax: with the following path and query parameters: 111.4.1.1. Path Parameters (1 parameters) Name Description Default Type path (consumer) Required The path under which this endpoint serves the HTTP requests, for proxy use 'proxy'. String 111.4.1.2. Query Parameters (21 parameters) Name Description Default Type consumes (consumer) The content type this endpoint accepts as an input, such as application/xml or application/json. null or / mean no restriction. String cookieDomain (consumer) Sets which server can receive cookies. String cookieHttpOnly (consumer) Sets whether to prevent client side scripts from accessing created cookies. false boolean cookieMaxAge (consumer) Sets the maximum cookie age in seconds. Long cookiePath (consumer) Sets the URL path that must exist in the requested URL in order to send the Cookie. / String cookieSameSite (consumer) Sets whether to prevent the browser from sending cookies along with cross-site requests. Enum values: STRICT LAX NONE Lax CookieSameSite cookieSecure (consumer) Sets whether the cookie is only sent to the server with an encrypted request over HTTPS. false boolean handleWriteResponseError (consumer) When Camel is complete processing the message, and the HTTP server is writing response. This option controls whether Camel should catch any failure during writing response and store this on the Exchange, which allows onCompletion/UnitOfWork to regard the Exchange as failed and have access to the caused exception from the HTTP server. false boolean httpMethodRestrict (consumer) A comma separated list of HTTP methods to serve, e.g. GET,POST . If no methods are specified, all methods will be served. 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 muteException (consumer) If enabled and an Exchange failed processing on the consumer side the response's body won't contain the exception's stack trace. true boolean produces (consumer) The content type this endpoint produces, such as application/xml or application/json. String returnHttpRequestHeaders (consumer) Whether to include HTTP request headers (Accept, User-Agent, etc.) into HTTP response produced by this endpoint. false boolean useCookieHandler (consumer) Whether to enable the Cookie Handler that allows Cookie addition, expiry, and retrieval (currently only supported by camel-platform-http-vertx). false boolean useStreaming (consumer) Whether to use streaming for large requests and responses (currently only supported by camel-platform-http-vertx). false boolean bridgeErrorHandler (consumer (advanced)) 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 exceptionHandler (consumer (advanced)) To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this option 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 (advanced)) Sets the exchange pattern when the consumer creates an exchange. Enum values: InOnly InOut InOptionalOut ExchangePattern fileNameExtWhitelist (consumer (advanced)) A comma or whitespace separated list of file extensions. Uploads having these extensions will be stored locally. Null value or asterisk () will allow all files. String headerFilterStrategy (advanced) To use a custom HeaderFilterStrategy to filter headers to and from Camel message. HeaderFilterStrategy platformHttpEngine (advanced) An HTTP Server engine implementation to serve the requests of this endpoint. PlatformHttpEngine 111.5. Implementing a reverse proxy Platform HTTP component can act as a reverse proxy, in that case some headers are populated from the absolute URL received on the request line of the HTTP request. Those headers are specific to the underlining platform. At this moment, this feature is only supported for Vert.x in camel-platform-http-vertx component. 111.6. Spring Boot Auto-Configuration The component supports 6 options, which are listed below. Name Description Default Type camel.component.platform-http.autowired-enabled Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc. true Boolean camel.component.platform-http.bridge-error-handler 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 camel.component.platform-http.enabled Whether to enable auto configuration of the platform-http component. This is enabled by default. Boolean camel.component.platform-http.engine An HTTP Server engine implementation to serve the requests. The option is a org.apache.camel.component.platform.http.spi.PlatformHttpEngine type. PlatformHttpEngine camel.component.platform-http.handle-write-response-error When Camel is complete processing the message, and the HTTP server is writing response. This option controls whether Camel should catch any failure during writing response and store this on the Exchange, which allows onCompletion/UnitOfWork to regard the Exchange as failed and have access to the caused exception from the HTTP server. false Boolean camel.component.platform-http.header-filter-strategy To use a custom org.apache.camel.spi.HeaderFilterStrategy to filter header to and from Camel message. The option is a org.apache.camel.spi.HeaderFilterStrategy type. HeaderFilterStrategy

Commands:
<dependency> <groupId>org.apache.camel.springboot</groupId> <artifactId>camel-platform-http-starter</artifactId> </dependency>
<dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-platform-http-vertx</artifactId> <version>4.8.3.redhat-00004</version> <!-- use the same version as your Camel core version --> </dependency>
platform-http:path