cgivre commented on a change in pull request #2496: URL: https://github.com/apache/drill/pull/2496#discussion_r829656132
########## File path: contrib/storage-http/src/main/java/org/apache/drill/exec/store/http/udfs/HttpHelperFunctions.java ########## @@ -0,0 +1,166 @@ +/* + * 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.drill.exec.store.http.udfs; + +import io.netty.buffer.DrillBuf; +import org.apache.drill.exec.expr.DrillSimpleFunc; +import org.apache.drill.exec.expr.annotations.FunctionTemplate; +import org.apache.drill.exec.expr.annotations.Output; +import org.apache.drill.exec.expr.annotations.Param; +import org.apache.drill.exec.expr.annotations.Workspace; +import org.apache.drill.exec.server.DrillbitContext; +import org.apache.drill.exec.server.options.OptionManager; +import org.apache.drill.exec.vector.complex.reader.FieldReader; +import org.apache.drill.exec.vector.complex.writer.BaseWriter.ComplexWriter; + +import javax.inject.Inject; + +public class HttpHelperFunctions { + + @FunctionTemplate(names = {"http_get_url", "httpGetUrl"}, + scope = FunctionTemplate.FunctionScope.SIMPLE, + isVarArg = true) + public static class HttpGetFunction implements DrillSimpleFunc { + + @Param + FieldReader[] inputReaders; + + @Output + ComplexWriter writer; + + @Inject + OptionManager options; + + @Inject + DrillBuf buffer; + + @Workspace + org.apache.drill.exec.vector.complex.fn.JsonReader jsonReader; + + @Override + public void setup() { + jsonReader = new org.apache.drill.exec.vector.complex.fn.JsonReader.Builder(buffer) + .defaultSchemaPathColumns() + .readNumbersAsDouble(options.getOption(org.apache.drill.exec.ExecConstants.JSON_READ_NUMBERS_AS_DOUBLE).bool_val) + .allTextMode(options.getOption(org.apache.drill.exec.ExecConstants.JSON_ALL_TEXT_MODE).bool_val) + .enableNanInf(options.getOption(org.apache.drill.exec.ExecConstants.JSON_READER_NAN_INF_NUMBERS).bool_val) + .build(); + } + + @Override + public void eval() { + if (inputReaders.length > 0) { + // Get the URL + FieldReader urlReader = inputReaders[0]; + String url = urlReader.readObject().toString(); + + // Process Positional Arguments + java.util.List args = org.apache.drill.exec.store.http.udfs.HttpHelperUtils.buildParameterList(inputReaders); + String finalUrl = org.apache.drill.exec.util.HttpUtils.mapPositionalParameters(url, args); + + // Make the API call + String results = org.apache.drill.exec.util.HttpUtils.makeSimpleGetRequest(finalUrl); + + // If the result string is null or empty, return an empty map + if (results == null || results.length() == 0) { + // Return empty map + org.apache.drill.exec.vector.complex.writer.BaseWriter.MapWriter mapWriter = writer.rootAsMap(); + mapWriter.start(); + mapWriter.end(); + return; + } + + try { + jsonReader.setSource(results); + jsonReader.setIgnoreJSONParseErrors(true); // Reduce number of errors + jsonReader.write(writer); + buffer = jsonReader.getWorkBuf(); + } catch (Exception e) { + throw new org.apache.drill.common.exceptions.DrillRuntimeException("Error while converting from JSON. ", e); + } + } + } + } + + + @FunctionTemplate(names = {"http_get", "httpGet"}, Review comment: Done! I called them `http_get` for the simple get request, and `http_request` for the request from storage. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: dev-unsubscr...@drill.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
