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Extract log related logics from states
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.../src/main/java/io/ballerina/stdlib/http/api/logging/accesslog/HttpAccessLogFormatter.java
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| /* | ||
| * Copyright (c) 2024, WSO2 LLC. (http://www.wso2.org) All Rights Reserved. | ||
| * | ||
| * WSO2 LLC. 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. | ||
| */ | ||
|
|
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| package io.ballerina.stdlib.http.api.logging.accesslog; | ||
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| import com.google.gson.Gson; | ||
| import com.google.gson.JsonArray; | ||
| import com.google.gson.JsonObject; | ||
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|
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| import java.util.LinkedHashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Objects; | ||
| import java.util.stream.Collectors; | ||
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|
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| import static io.ballerina.stdlib.http.api.HttpConstants.ATTRIBUTE_DATE_TIME; | ||
| import static io.ballerina.stdlib.http.api.HttpConstants.ATTRIBUTE_HTTP_REFERRER; | ||
| import static io.ballerina.stdlib.http.api.HttpConstants.ATTRIBUTE_HTTP_USER_AGENT; | ||
| import static io.ballerina.stdlib.http.api.HttpConstants.ATTRIBUTE_HTTP_X_FORWARDED_FOR; | ||
| import static io.ballerina.stdlib.http.api.HttpConstants.ATTRIBUTE_IP; | ||
| import static io.ballerina.stdlib.http.api.HttpConstants.ATTRIBUTE_REQUEST; | ||
| import static io.ballerina.stdlib.http.api.HttpConstants.ATTRIBUTE_REQUEST_BODY_SIZE; | ||
| import static io.ballerina.stdlib.http.api.HttpConstants.ATTRIBUTE_REQUEST_METHOD; | ||
| import static io.ballerina.stdlib.http.api.HttpConstants.ATTRIBUTE_REQUEST_TIME; | ||
| import static io.ballerina.stdlib.http.api.HttpConstants.ATTRIBUTE_REQUEST_URI; | ||
| import static io.ballerina.stdlib.http.api.HttpConstants.ATTRIBUTE_RESPONSE_BODY_SIZE; | ||
| import static io.ballerina.stdlib.http.api.HttpConstants.ATTRIBUTE_SCHEME; | ||
| import static io.ballerina.stdlib.http.api.HttpConstants.ATTRIBUTE_STATUS; | ||
|
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| public class HttpAccessLogFormatter { | ||
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| private HttpAccessLogFormatter() {} | ||
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| public static String formatAccessLogMessage(HttpAccessLogMessage inboundMessage, | ||
| List<HttpAccessLogMessage> outboundMessages, HttpAccessLogFormat format, | ||
| List<String> attributes) { | ||
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| Map<String, String> inboundMap = mapAccessLogMessage(inboundMessage, format, attributes); | ||
| if (format == HttpAccessLogFormat.FLAT) { | ||
| String inboundFormatted = inboundMap.values().stream() | ||
| .filter(Objects::nonNull) | ||
| .collect(Collectors.joining(" ")); | ||
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| if (!outboundMessages.isEmpty()) { | ||
| String outboundFormatted = outboundMessages.stream() | ||
| .map(outboundMsg -> mapAccessLogMessage(outboundMsg, format, attributes)) | ||
| .map(outboundMap -> outboundMap.values().stream() | ||
| .filter(Objects::nonNull) | ||
| .collect(Collectors.joining(" "))) | ||
| .collect(Collectors.joining(" ")); | ||
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| return inboundFormatted + " \"~\" " + outboundFormatted; | ||
| } else { | ||
| return inboundFormatted; | ||
| } | ||
| } else { | ||
| Gson gson = new Gson(); | ||
| JsonObject jsonObject = new JsonObject(); | ||
|
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| inboundMap.forEach(jsonObject::addProperty); | ||
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| if (!outboundMessages.isEmpty()) { | ||
| JsonArray upstreamArray = new JsonArray(); | ||
| for (HttpAccessLogMessage outboundMessage : outboundMessages) { | ||
| Map<String, String> outboundMap = mapAccessLogMessage(outboundMessage, format, attributes); | ||
| JsonObject outboundJson = gson.toJsonTree(outboundMap).getAsJsonObject(); | ||
| upstreamArray.add(outboundJson); | ||
| } | ||
| jsonObject.add("upstream", upstreamArray); | ||
| } | ||
| return gson.toJson(jsonObject); | ||
| } | ||
| } | ||
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| private static Map<String, String> mapAccessLogMessage(HttpAccessLogMessage httpAccessLogMessage, | ||
| HttpAccessLogFormat format, List<String> attributes) { | ||
| List<String> allAttributes = List.of(ATTRIBUTE_IP, ATTRIBUTE_DATE_TIME, ATTRIBUTE_REQUEST, | ||
| ATTRIBUTE_REQUEST_METHOD, ATTRIBUTE_REQUEST_URI, ATTRIBUTE_SCHEME, ATTRIBUTE_STATUS, | ||
| ATTRIBUTE_REQUEST_BODY_SIZE, ATTRIBUTE_RESPONSE_BODY_SIZE, ATTRIBUTE_REQUEST_TIME, | ||
| ATTRIBUTE_HTTP_REFERRER, ATTRIBUTE_HTTP_USER_AGENT, ATTRIBUTE_HTTP_X_FORWARDED_FOR); | ||
| List<String> defaultAttributes = List.of(ATTRIBUTE_IP, ATTRIBUTE_DATE_TIME, ATTRIBUTE_REQUEST, ATTRIBUTE_STATUS, | ||
| ATTRIBUTE_RESPONSE_BODY_SIZE, ATTRIBUTE_HTTP_REFERRER, ATTRIBUTE_HTTP_USER_AGENT); | ||
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| Map<String, String> attributeValues = new LinkedHashMap<>(); | ||
| allAttributes.forEach(attr -> attributeValues.put(attr, null)); | ||
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| if (!attributes.isEmpty()) { | ||
| attributes.forEach(attr -> { | ||
| attributeValues.put(attr, formatAccessLogAttribute(httpAccessLogMessage, format, attr)); | ||
| }); | ||
| } else { | ||
| defaultAttributes.forEach(attr -> | ||
| attributeValues.put(attr, formatAccessLogAttribute(httpAccessLogMessage, format, attr))); | ||
| } | ||
| return attributeValues; | ||
| } | ||
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| private static String formatAccessLogAttribute(HttpAccessLogMessage httpAccessLogMessage, | ||
| HttpAccessLogFormat format, String attribute) { | ||
| return switch (attribute) { | ||
| case ATTRIBUTE_IP -> httpAccessLogMessage.getIp(); | ||
| case ATTRIBUTE_DATE_TIME -> | ||
| String.format("[%1$td/%1$tb/%1$tY:%1$tT.%1$tL %1$tz]", httpAccessLogMessage.getDateTime()); | ||
| case ATTRIBUTE_REQUEST_METHOD -> httpAccessLogMessage.getRequestMethod(); | ||
| case ATTRIBUTE_REQUEST_URI -> httpAccessLogMessage.getRequestUri(); | ||
| case ATTRIBUTE_SCHEME -> httpAccessLogMessage.getScheme(); | ||
| case ATTRIBUTE_REQUEST -> String.format(format == HttpAccessLogFormat.FLAT ? | ||
| "\"%1$s %2$s %3$s\"" : "%1$s %2$s %3$s", httpAccessLogMessage.getRequestMethod(), | ||
| httpAccessLogMessage.getRequestUri(), httpAccessLogMessage.getScheme()); | ||
| case ATTRIBUTE_STATUS -> String.valueOf(httpAccessLogMessage.getStatus()); | ||
| case ATTRIBUTE_REQUEST_BODY_SIZE -> String.valueOf(httpAccessLogMessage.getRequestBodySize()); | ||
| case ATTRIBUTE_RESPONSE_BODY_SIZE -> String.valueOf(httpAccessLogMessage.getResponseBodySize()); | ||
| case ATTRIBUTE_REQUEST_TIME -> String.valueOf(httpAccessLogMessage.getRequestTime()); | ||
| case ATTRIBUTE_HTTP_REFERRER -> String.format(format == HttpAccessLogFormat.FLAT ? | ||
| "\"%1$s\"" : "%1$s", getHyphenForNull(httpAccessLogMessage.getHttpReferrer())); | ||
| case ATTRIBUTE_HTTP_USER_AGENT -> String.format(format == HttpAccessLogFormat.FLAT ? | ||
| "\"%1$s\"" : "%1$s", getHyphenForNull(httpAccessLogMessage.getHttpUserAgent())); | ||
| case ATTRIBUTE_HTTP_X_FORWARDED_FOR -> getHyphenForNull(httpAccessLogMessage.getHttpXForwardedFor()); | ||
| default -> getCustomHeaderValueForAttribute(httpAccessLogMessage, attribute); | ||
| }; | ||
| } | ||
|
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| private static String getCustomHeaderValueForAttribute(HttpAccessLogMessage httpAccessLogMessage, | ||
| String attribute) { | ||
| Map<String, String> customHeaders = httpAccessLogMessage.getCustomHeaders(); | ||
| if (attribute.startsWith("http_")) { | ||
| String customHeaderKey = attribute.substring(5); | ||
| for (Map.Entry<String, String> entry : customHeaders.entrySet()) { | ||
| if (entry.getKey().equalsIgnoreCase(customHeaderKey)) { | ||
| return entry.getValue(); | ||
| } | ||
| } | ||
| return "-"; | ||
| } | ||
| return null; | ||
| } | ||
|
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| private static String getHyphenForNull(String value) { | ||
| return value == null ? "-" : value; | ||
| } | ||
| } |
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