Examples with IBufferFactoryComponent io.apiman.gateway.engine.components.IBufferFactoryComponent used on opensource projects

Example 1 with IBufferFactoryComponent

use of io.apiman.gateway.engine.components.IBufferFactoryComponent in project apiman-plugins by apiman.

the class JsonpPolicy method getResponseDataHandler.

/**
 * @see io.apiman.gateway.engine.policy.IDataPolicy#getResponseDataHandler(io.apiman.gateway.engine.beans.ApiResponse, io.apiman.gateway.engine.policy.IPolicyContext, java.lang.Object)
 */
@Override
public IReadWriteStream<ApiResponse> getResponseDataHandler(final ApiResponse response, IPolicyContext context, Object policyConfiguration) {
    final String callbackFunctionName = (String) context.getAttribute(CALLBACK_FUNCTION_NAME, null);
    if (callbackFunctionName != null) {
        HttpHeaders httpHeaders = new HttpHeaders(response.getHeaders());
        final String encoding = httpHeaders.getCharsetFromContentType(StandardCharsets.UTF_8.name());
        final int additionalContentLength = callbackFunctionName.length() + OPEN_PARENTHESES.length() + CLOSE_PARENTHESES.length();
        // JSONP responses should have the Content-Type header set to "application/javascript"
        httpHeaders.setContentType(APPLICATION_JAVASCRIPT);
        // the Content-Length will need to be longer
        httpHeaders.incrementContentLength(additionalContentLength);
        final IBufferFactoryComponent bufferFactory = context.getComponent(IBufferFactoryComponent.class);
        return new AbstractStream<ApiResponse>() {

            private boolean firstChunk = true;

            @Override
            public ApiResponse getHead() {
                return response;
            }

            @Override
            protected void handleHead(ApiResponse head) {
            }

            @Override
            public void write(IApimanBuffer chunk) {
                if (firstChunk) {
                    IApimanBuffer buffer = bufferFactory.createBuffer(callbackFunctionName.length() + OPEN_PARENTHESES.length());
                    try {
                        buffer.append(callbackFunctionName, encoding);
                        buffer.append(OPEN_PARENTHESES, encoding);
                    } catch (UnsupportedEncodingException e) {
                        // TODO Review the exception handling. A better approach might be throwing an IOException.
                        throw new RuntimeException(e);
                    }
                    // Write callbackFunctionName(
                    super.write(buffer);
                    firstChunk = false;
                }
                super.write(chunk);
            }

            @Override
            public void end() {
                // Write close parenth ) on end if something has been written
                if (!firstChunk) {
                    IApimanBuffer buffer = bufferFactory.createBuffer(CLOSE_PARENTHESES.length());
                    try {
                        buffer.append(CLOSE_PARENTHESES, encoding);
                    } catch (UnsupportedEncodingException e) {
                        // TODO Review the exception handling. A better approach might be throwing an IOException.
                        throw new RuntimeException(e);
                    }
                    super.write(buffer);
                }
                super.end();
            }
        };
    }
    return null;
}

Example 2 with IBufferFactoryComponent

use of io.apiman.gateway.engine.components.IBufferFactoryComponent in project apiman-plugins by apiman.

the class TransformationPolicy method getRequestDataHandler.

/**
 * @see io.apiman.gateway.engine.policy.IDataPolicy#getRequestDataHandler(io.apiman.gateway.engine.beans.ApiRequest, io.apiman.gateway.engine.policy.IPolicyContext, java.lang.Object)
 */
@Override
public IReadWriteStream<ApiRequest> getRequestDataHandler(final ApiRequest request, IPolicyContext context, Object policyConfiguration) {
    final IBufferFactoryComponent bufferFactory = context.getComponent(IBufferFactoryComponent.class);
    final int contentLength = request.getHeaders().containsKey(CONTENT_LENGTH) ? Integer.parseInt(request.getHeaders().get(CONTENT_LENGTH)) : 0;
    return new AbstractStream<ApiRequest>() {

        private IApimanBuffer readBuffer = bufferFactory.createBuffer(contentLength);

        @Override
        public ApiRequest getHead() {
            return request;
        }

        @Override
        protected void handleHead(ApiRequest head) {
        }

        @Override
        public void write(IApimanBuffer chunk) {
            readBuffer.append(chunk.getBytes());
        }

        @Override
        public void end() {
            final DataFormat clientFormat = (DataFormat) context.getAttribute(CLIENT_FORMAT, null);
            final DataFormat serverFormat = (DataFormat) context.getAttribute(SERVER_FORMAT, null);
            if (readBuffer.length() > 0) {
                if (isValidTransformation(clientFormat, serverFormat)) {
                    DataTransformer dataTransformer = DataTransformerFactory.getDataTransformer(clientFormat, serverFormat);
                    IApimanBuffer writeBuffer = bufferFactory.createBuffer(readBuffer.length());
                    String data = dataTransformer.transform(new String(readBuffer.getBytes()));
                    writeBuffer.append(data);
                    super.write(writeBuffer);
                } else {
                    super.write(readBuffer);
                }
            }
            super.end();
        }
    };
}

Example 3 with IBufferFactoryComponent

use of io.apiman.gateway.engine.components.IBufferFactoryComponent in project apiman-plugins by apiman.

the class TransformationPolicy method getResponseDataHandler.

/**
 * @see io.apiman.gateway.engine.policy.IDataPolicy#getResponseDataHandler(io.apiman.gateway.engine.beans.ApiResponse, io.apiman.gateway.engine.policy.IPolicyContext, java.lang.Object)
 */
@Override
public IReadWriteStream<ApiResponse> getResponseDataHandler(final ApiResponse response, IPolicyContext context, Object policyConfiguration) {
    final DataFormat clientFormat = (DataFormat) context.getAttribute(CLIENT_FORMAT, null);
    final DataFormat serverFormat = (DataFormat) context.getAttribute(SERVER_FORMAT, null);
    if (isValidTransformation(clientFormat, serverFormat)) {
        final IBufferFactoryComponent bufferFactory = context.getComponent(IBufferFactoryComponent.class);
        final int contentLength = response.getHeaders().containsKey(CONTENT_LENGTH) ? Integer.parseInt(response.getHeaders().get(CONTENT_LENGTH)) : 0;
        return new AbstractStream<ApiResponse>() {

            private IApimanBuffer readBuffer = bufferFactory.createBuffer(contentLength);

            @Override
            public ApiResponse getHead() {
                return response;
            }

            @Override
            protected void handleHead(ApiResponse head) {
            }

            @Override
            public void write(IApimanBuffer chunk) {
                byte[] bytes = chunk.getBytes();
                readBuffer.append(bytes);
            }

            @Override
            public void end() {
                if (readBuffer.length() > 0) {
                    DataTransformer dataTransformer = DataTransformerFactory.getDataTransformer(serverFormat, clientFormat);
                    IApimanBuffer writeBuffer = bufferFactory.createBuffer(readBuffer.length());
                    String data = dataTransformer.transform(new String(readBuffer.getBytes()));
                    writeBuffer.append(data);
                    super.write(writeBuffer);
                }
                super.end();
            }
        };
    }
    return null;
}

Example 4 with IBufferFactoryComponent

use of io.apiman.gateway.engine.components.IBufferFactoryComponent in project apiman by apiman.

the class SimpleDataPolicy method getRequestDataHandler.

/**
 * @see io.apiman.gateway.engine.policy.IDataPolicy#getRequestDataHandler(io.apiman.gateway.engine.beans.ApiRequest, io.apiman.gateway.engine.policy.IPolicyContext, java.lang.Object)
 */
@Override
public IReadWriteStream<ApiRequest> getRequestDataHandler(final ApiRequest request, final IPolicyContext context, final Object policyConfiguration) {
    return new AbstractStream<ApiRequest>() {

        @Override
        public ApiRequest getHead() {
            return request;
        }

        @Override
        protected void handleHead(ApiRequest head) {
        }

        @Override
        public void write(IApimanBuffer chunk) {
            try {
                String chunkstr = chunk.toString("UTF-8");
                if (chunkstr.contains("$NAME")) {
                    chunkstr = chunkstr.replaceAll("\\$NAME", "Barry Allen");
                    IBufferFactoryComponent bufferFactory = context.<IBufferFactoryComponent>getComponent(IBufferFactoryComponent.class);
                    super.write(bufferFactory.createBuffer(chunkstr));
                } else {
                    super.write(chunk);
                }
            } catch (UnsupportedEncodingException e) {
                super.write(chunk);
            }
        }
    };
}

Example 5 with IBufferFactoryComponent

use of io.apiman.gateway.engine.components.IBufferFactoryComponent in project apiman by apiman.

the class URLRewritingStreamTest method doTest.

/**
 * @param fromRegexp
 * @param toReplacement
 * @param chunks
 * @param expectedResult
 */
private void doTest(String fromRegexp, String toReplacement, String[] chunks, String expectedResult) {
    IBufferFactoryComponent bufferFactory = new ByteBufferFactoryComponent();
    URLRewritingStream stream = new URLRewritingStream(bufferFactory, (ApiResponse) null, fromRegexp, toReplacement);
    RecordingHandler handler = new RecordingHandler(bufferFactory.createBuffer());
    stream.bodyHandler(handler);
    stream.endHandler(new IAsyncHandler<Void>() {

        @Override
        public void handle(Void result) {
        }
    });
    for (String chunk : chunks) {
        stream.write(bufferFactory.createBuffer(chunk));
    }
    stream.end();
    String result = handler.getBuffer().toString();
    Assert.assertEquals(expectedResult, result);
}