davsclaus commented on a change in pull request #201: Fix #184 Leverage platform http service URL: https://github.com/apache/camel-quarkus/pull/201#discussion_r329979478
########## File path: extensions/platform-http/runtime/src/main/java/org/apache/camel/quarkus/component/platform/http/runtime/QuarkusPlatformHttpConsumer.java ########## @@ -0,0 +1,376 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.camel.quarkus.component.platform.http.runtime; + +import java.io.IOException; +import java.io.InputStream; +import java.io.PrintWriter; +import java.io.StringWriter; +import java.nio.ByteBuffer; +import java.nio.charset.StandardCharsets; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.Iterator; +import java.util.List; +import java.util.Map; +import java.util.Set; + +import io.vertx.core.MultiMap; +import io.vertx.core.buffer.Buffer; +import io.vertx.core.http.HttpMethod; +import io.vertx.core.http.HttpServerRequest; +import io.vertx.core.http.HttpServerResponse; +import io.vertx.ext.web.Route; +import io.vertx.ext.web.Router; +import io.vertx.ext.web.RoutingContext; +import io.vertx.ext.web.handler.BodyHandler; + +import org.apache.camel.Consumer; +import org.apache.camel.Endpoint; +import org.apache.camel.Exchange; +import org.apache.camel.Message; +import org.apache.camel.NoTypeConversionAvailableException; +import org.apache.camel.Processor; +import org.apache.camel.TypeConversionException; +import org.apache.camel.TypeConverter; +import org.apache.camel.component.platform.http.PlatformHttpComponent; +import org.apache.camel.component.platform.http.PlatformHttpEndpoint; +import org.apache.camel.component.platform.http.spi.Method; +import org.apache.camel.spi.HeaderFilterStrategy; +import org.apache.camel.support.DefaultConsumer; +import org.apache.camel.support.DefaultMessage; +import org.apache.camel.support.ExchangeHelper; +import org.apache.camel.support.MessageHelper; +import org.apache.camel.support.ObjectHelper; +import org.eclipse.microprofile.config.Config; +import org.eclipse.microprofile.config.ConfigProvider; +import org.jboss.logging.Logger; + +/** + * A Quarkus specific {@link Consumer} for the {@link PlatformHttpComponent}. + */ +public class QuarkusPlatformHttpConsumer extends DefaultConsumer { + private static final Logger LOG = Logger.getLogger("org.apache.camel.quarkus.component.platform.http"); + + private final Router router; + private Route route; + + public QuarkusPlatformHttpConsumer(Endpoint endpoint, Processor processor, Router router) { + super(endpoint, processor); + this.router = router; + } + + @Override + public PlatformHttpEndpoint getEndpoint() { + return (PlatformHttpEndpoint) super.getEndpoint(); + } + + @Override + protected void doStart() throws Exception { + super.doStart(); + + final String path = getEndpoint().getPath(); + final Route r = router.route(path); + final Set<Method> methods = getEndpoint().getEffectiveMethods(); + if (!methods.equals(Method.getAll())) { + methods.stream().forEach(m -> r.method(HttpMethod.valueOf(m.name()))); + } + + Config cfg = ConfigProvider.getConfig(); + final BodyHandler bodyHandler = BodyHandler.create(); + /* Keep in sync with how the BodyHandler is configured in io.quarkus.vertx.web.runtime.VertxWebRecorder + * Eventually, VertxWebRecorder should have a method to do this for us. */ + cfg.getOptionalValue("quarkus.http.body.handle-file-uploads", boolean.class).ifPresent(bodyHandler::setHandleFileUploads); + cfg.getOptionalValue("quarkus.http.body.uploads-directory", String.class).ifPresent(bodyHandler::setUploadsDirectory); + cfg.getOptionalValue("quarkus.http.body.delete-uploaded-files-on-end", boolean.class).ifPresent(bodyHandler::setDeleteUploadedFilesOnEnd); + cfg.getOptionalValue("quarkus.http.body.merge-form-attributes", boolean.class).ifPresent(bodyHandler::setMergeFormAttributes); + cfg.getOptionalValue("quarkus.http.body.preallocate-body-buffer", boolean.class).ifPresent(bodyHandler::setPreallocateBodyBuffer); + + r + .handler(bodyHandler) + .handler(ctx -> { + try { + final PlatformHttpEndpoint endpoint = getEndpoint(); + final HeaderFilterStrategy headerFilterStrategy = endpoint.getHeaderFilterStrategy(); + final Exchange e = toExchange(ctx, endpoint.createExchange(), headerFilterStrategy); + getProcessor().process(e); + writeResponse(ctx, e, headerFilterStrategy); + } catch (Exception e1) { + LOG.debugf(e1, "Could not handle '%s'", path); + ctx.fail(e1); + } + }); + + this.route = r; + } + + @Override + protected void doStop() throws Exception { + if (route != null) { + route.remove(); + route = null; + } + super.doStop(); + } + + @Override + protected void doSuspend() throws Exception { + if (route != null) { + route.disable(); + } + super.doSuspend(); + } + + @Override + protected void doResume() throws Exception { + if (route != null) { + route.enable(); + } + super.doResume(); + } + + Object toHttpResponse(HttpServerResponse response, Message message, HeaderFilterStrategy headerFilterStrategy) { + final Exchange exchange = message.getExchange(); + final boolean failed = exchange.isFailed(); + final int defaultCode = failed ? 500 : 200; + + final int code = message.getHeader(Exchange.HTTP_RESPONSE_CODE, defaultCode, int.class); + + response.setStatusCode(code); + + final TypeConverter tc = exchange.getContext().getTypeConverter(); + + //copy headers from Message to Response + if (headerFilterStrategy != null) { + for (Map.Entry<String, Object> entry : message.getHeaders().entrySet()) { + final String key = entry.getKey(); + final Object value = entry.getValue(); + // use an iterator as there can be multiple values. (must not use a delimiter) + final Iterator<?> it = ObjectHelper.createIterator(value, null); + String firstValue = null; + List<String> values = null; + while (it.hasNext()) { + final String headerValue = tc.convertTo(String.class, it.next()); + if (headerValue != null + && !headerFilterStrategy.applyFilterToCamelHeaders(key, headerValue, exchange)) { + if (firstValue == null) { + firstValue = headerValue; + } else { + if (values == null) { + values = new ArrayList<String>(); + values.add(firstValue); + } + values.add(headerValue); + } + } + } + if (values != null) { + response.putHeader(key, values); + } else if (firstValue != null) { + response.putHeader(key, firstValue); + } + } + } + + Object body = message.getBody(); + final Exception exception = exchange.getException(); + + if (exception != null) { + // we failed due an exception so print it as plain text + final StringWriter sw = new StringWriter(); + final PrintWriter pw = new PrintWriter(sw); + exception.printStackTrace(pw); + + // the body should then be the stacktrace + body = ByteBuffer.wrap(sw.toString().getBytes(StandardCharsets.UTF_8)); + // force content type to be text/plain as that is what the stacktrace is + message.setHeader(Exchange.CONTENT_TYPE, "text/plain; charset=utf-8"); + + // and mark the exception as failure handled, as we handled it by returning it as the response + ExchangeHelper.setFailureHandled(exchange); + } + + // set the content type in the response. + final String contentType = MessageHelper.getContentType(message); + if (contentType != null) { + // set content-type + response.putHeader("Content-Type", contentType); + } + return body; + } + + void writeResponse(RoutingContext ctx, Exchange camelExchange, HeaderFilterStrategy headerFilterStrategy) { + final Object body = toHttpResponse(ctx.response(), camelExchange.getMessage(), headerFilterStrategy); + + final HttpServerResponse response = ctx.response(); + if (body == null) { + QuarkusPlatformHttpEngine.LOG.tracef("No payload to send as reply for exchange: %s", camelExchange); + response.putHeader("Content-Type", "text/plain; charset=utf-8"); + response.end("No response available"); + return; + } + + if (body instanceof String) { + response.end((String) body); + } else if (body instanceof InputStream) { + final byte[] bytes = new byte[4096]; + try (InputStream in = (InputStream) body) { + int len; + while ((len = in.read(bytes)) >= 0) { + final Buffer b = Buffer.buffer(len); + b.appendBytes(bytes, 0, len); + response.write(b); + } + } catch (IOException e) { + throw new RuntimeException(e); + } + response.end(); + } else { + final TypeConverter tc = camelExchange.getContext().getTypeConverter(); + try { + final ByteBuffer bb = tc.mandatoryConvertTo(ByteBuffer.class, body); + final Buffer b = Buffer.buffer(bb.capacity()); + b.setBytes(0, bb); + response.end(b); + } catch (TypeConversionException | NoTypeConversionAvailableException e) { + throw new RuntimeException(e); + } + } + + } + + Exchange toExchange(RoutingContext ctx, Exchange exchange, HeaderFilterStrategy headerFilterStrategy) { + Message in = toCamelMessage(ctx, exchange, headerFilterStrategy); + final String charset = ctx.parsedHeaders().contentType().parameter("charset"); + exchange.setProperty(Exchange.CHARSET_NAME, charset); + in.setHeader(Exchange.HTTP_CHARACTER_ENCODING, charset); + + exchange.setIn(in); + return exchange; + } + + void populateCamelHeaders(RoutingContext ctx, Map<String, Object> headersMap, Exchange exchange, HeaderFilterStrategy headerFilterStrategy) { + + final HttpServerRequest request = ctx.request(); + headersMap.put(Exchange.HTTP_PATH, request.path()); + + if (headerFilterStrategy != null) { + final MultiMap requestHeaders = request.headers(); + final String authz = requestHeaders.get("authorization"); + // store a special header that this request was authenticated using HTTP Basic + if (authz != null && authz.trim().startsWith("Basic")) { + if (!headerFilterStrategy.applyFilterToExternalHeaders(Exchange.AUTHENTICATION, "Basic", exchange)) { + appendHeader(headersMap, Exchange.AUTHENTICATION, "Basic"); + } + } + for (String name : requestHeaders.names()) { + // add the headers one by one, and use the header filter strategy + for (String value : requestHeaders.getAll(name)) { + if (!headerFilterStrategy.applyFilterToExternalHeaders(name.toString(), value, exchange)) { + appendHeader(headersMap, name.toString(), value); + } + } + } + + //process uri parameters as headers + final MultiMap pathParameters = ctx.queryParams(); + //continue if the map is not empty, otherwise there are no params + if (!pathParameters.isEmpty()) { + for (String name : pathParameters.names()) { + for (String value : pathParameters.getAll(name)) { + if (!headerFilterStrategy.applyFilterToExternalHeaders(name, value, exchange)) { + appendHeader(headersMap, name, value); + } + } + } + } + } + + // TODO: figure out whether we need this or remove + // // Create headers for REST path placeholder variables + // Map<String, Object> predicateContextParams = httpExchange.getAttachment(Predicate.PREDICATE_CONTEXT); + // if (predicateContextParams != null) { + // // Remove this as it's an unwanted artifact of our Undertow predicate chain + // predicateContextParams.remove("remaining"); + // + // for (String paramName : predicateContextParams.keySet()) { + // headersMap.put(paramName, predicateContextParams.get(paramName)); + // } + // } + + // NOTE: these headers is applied using the same logic as camel-http/camel-jetty to be consistent Review comment: Thanks this is good to know ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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