{"action":"created","comment":{"url":"https://api.github.com/repos/caskdata/cdap/pulls/comments/33812232","id":33812232,"diff_hunk":"@@ -0,0 +1,220 @@\n+/*\n+ * Copyright © 2015 Cask Data, Inc.\n+ *\n+ * Licensed under the Apache License, Version 2.0 (the \"License\"); you may not\n+ * use this file except in compliance with the License. You may obtain a copy of\n+ * the License at\n+ *\n+ * http://www.apache.org/licenses/LICENSE-2.0\n+ *\n+ * Unless required by applicable law or agreed to in writing, software\n+ * distributed under the License is distributed on an \"AS IS\" BASIS, WITHOUT\n+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the\n+ * License for the specific language governing permissions and limitations under\n+ * the License.\n+ */\n+\n+package co.cask.cdap.template.etl.transform;\n+\n+import co.cask.cdap.api.annotation.Description;\n+import co.cask.cdap.api.annotation.Name;\n+import co.cask.cdap.api.annotation.Plugin;\n+import co.cask.cdap.api.common.Bytes;\n+import co.cask.cdap.api.data.format.StructuredRecord;\n+import co.cask.cdap.api.data.schema.Schema;\n+import co.cask.cdap.api.templates.plugins.PluginConfig;\n+import co.cask.cdap.template.etl.api.Emitter;\n+import co.cask.cdap.template.etl.api.Transform;\n+import net.sf.uadetector.ReadableUserAgent;\n+import net.sf.uadetector.UserAgentStringParser;\n+import net.sf.uadetector.service.UADetectorServiceFactory;\n+import org.slf4j.Logger;\n+import org.slf4j.LoggerFactory;\n+\n+import java.nio.ByteBuffer;\n+import java.text.ParseException;\n+import java.text.SimpleDateFormat;\n+import java.util.regex.Matcher;\n+import java.util.regex.Pattern;\n+import javax.annotation.Nullable;\n+\n+/**\n+ * Parses log formats to extract access information\n+ */\n+@Plugin(type = \"transform\")\n+@Name(\"LogParser\")\n+@Description(\"Parses logs from any input source for relevant information such as URI, IP, Browser, Device, and \" +\n+  \"Timestamp.\")\n+public class LogParserTransform extends Transform<StructuredRecord, StructuredRecord> {\n+  private static final Schema LOG_SCHEMA = Schema.recordOf(\n+    \"event\",\n+    Schema.Field.of(\"uri\", Schema.of(Schema.Type.STRING)),\n+    Schema.Field.of(\"ip\", Schema.of(Schema.Type.STRING)),\n+    Schema.Field.of(\"browser\", Schema.of(Schema.Type.STRING)),\n+    Schema.Field.of(\"device\", Schema.of(Schema.Type.STRING)),\n+    Schema.Field.of(\"ts\", Schema.of(Schema.Type.LONG))\n+  );\n+  private static final String LOG_FORMAT_DESCRIPTION = \"Log format to parse. Currently only supports S3 and \" +\n+    \"CLF Log format.\";\n+  private static final String INPUT_NAME_DESCRIPTION = \"Name of the field in the input schema which encodes the \" +\n+    \"log information. The given field must be of type String or Bytes\";\n+  private static final Logger LOG = LoggerFactory.getLogger(LogParserTransform.class);\n+  //Regex used to parse a CLF log, each field is commented above\n+  private static final Pattern CLF_LOG_PATTERN = Pattern.compile(\n+    //   IP                    id    user      date          request     code     size    referrer    user agent\n+    \"^([\\\\d.]+|[:][:][\\\\d]) (\\\\S+) (\\\\S+) \\\\[([^\\\\]]+)\\\\] \\\"([^\\\"]+)\\\" (\\\\d{3}) ([-\\\"\\\\d]+) \\\"([^\\\"]+)\\\" \\\"([^\\\"]+)\\\"\");\n+  //Regex used to parse a S3 log, each field is commented above\n+  private static final Pattern S3_LOG_PATTERN = Pattern.compile(\n+    // bucket owner name   time           ip                    req   reqID operation  key    request\n+    \"^(\\\\S+) (\\\\S+) \\\\[(\\\\p{Print}+)\\\\] ([\\\\d.]+|[:][:][\\\\d]) (\\\\S+) (\\\\S+) (\\\\S+) (\\\\S+) \\\"([^\\\"]+)\\\" \" +\n+      //  HTTP stat error code  bytes sent     obj size  time    turn time  referrer         user agent\n+      \"(\\\\d{3}) (\\\\p{Print}+) ([-\\\"\\\\d]+) ([-\\\"\\\\d]+) ([\\\\d]+) ([-\\\"\\\\d]+) \\\"(\\\\p{Print}+)\\\" \\\"([^\\\"]+)\\\" \" +\n+      //  version id\n+      \"(\\\\p{Print}+)\");\n+  //Regex used to parse the request field for the URI\n+  private static final Pattern REQUEST_PAGE_PATTERN = Pattern.compile(\"(\\\\S+)\\\\s(\\\\S+).*\");\n+  //Indices of which group request, time, ip, and user agent are in the S3 regex\n+  private static final int[] S3_INDICES = {9, 3, 4, 17};\n+  //Indices of which group request, time, ip, and user agent are in the CLF regex\n+  private static final int[] CLF_INDICES = {5, 4, 1, 9};\n+  //Number of groups matched in the S3 regex\n+  private static final int S3_REGEX_LENGTH = 18;\n+  //Number of groups matched in the CLF regex\n+  private static final int CLF_REGEX_LENGTH = 9;\n+  private static final String S3_LOG = \"S3\";\n+  private static final String CLF_LOG = \"CLF\";\n+  private final LogParserConfig config;\n+  private final SimpleDateFormat sdf = new SimpleDateFormat(\"dd/MMM/yyyy:HH:mm:ss Z\");\n+\n+  public LogParserTransform(LogParserConfig config) {\n+    this.config = config;\n+  }\n+\n+  @Override\n+  public void transform(StructuredRecord input, Emitter<StructuredRecord> emitter) throws Exception {\n+    String log = getLogFromInput(input);\n+    if (log == null) {\n+      LOG.error(\"Couldn't read schema, log message was null\");\n+      return;\n+    }\n+\n+    StructuredRecord output = null;\n+    if (!S3_LOG.equals(config.logFormat) && !CLF_LOG.equals(config.logFormat)) {\n+      LOG.error(\"Log format not currently supported.\");\n+      return;\n+    } else if (S3_LOG.equals(config.logFormat)) {\n+      Matcher logMatcher = S3_LOG_PATTERN.matcher(log);\n+      if (!logMatcher.matches() || logMatcher.groupCount() < S3_REGEX_LENGTH) {\n+        LOG.debug(\"Couldn't parse log because log did not match the S3 format, log:\" + log);\n+        return;\n+      }\n+      output = parseRequest(logMatcher, S3_INDICES);\n+    } else if (CLF_LOG.equals(config.logFormat)) {\n+      Matcher logMatcher = CLF_LOG_PATTERN.matcher(log);\n+      if (!logMatcher.matches() || logMatcher.groupCount() < CLF_REGEX_LENGTH) {\n+        LOG.debug(\"Couldn't parse log because the log did not match the CLF format. log:\" + log);\n+        return;\n+      }\n+      output = parseRequest(logMatcher, CLF_INDICES);\n+    }\n+\n+    if (output != null) {\n+      emitter.emit(output);\n+    }\n+  }\n+\n+  /**\n+   * Gets the log message from the input\n+   * @param input the StructuredRecord to extract the log from\n+   * @return the log message, or null on failure\n+   */\n+  @Nullable\n+  private String getLogFromInput(StructuredRecord input) {\n+    Schema.Field inputField = input.getSchema().getField(config.inputName);\n+    if (inputField == null) {\n+      LOG.debug(\"Invalid inputName, no known inputField matches given input\");\n+      return null;\n+    }\n+\n+    Schema inputSchema = inputField.getSchema();\n+    if (inputSchema.isNullableSimple()) {\n+      inputSchema = inputSchema.getNonNullable();\n+    }\n+    Schema.Type inputType = inputSchema.getType();\n+\n+    if (!Schema.Type.STRING.equals(inputType) && !Schema.Type.BYTES.equals(inputType)) {\n+      LOG.error(\"Unsupported inputType, only bytes and string are supported.\");","path":"cdap-app-templates/cdap-etl/cdap-etl-lib/src/main/java/co/cask/cdap/template/etl/transform/LogParserTransform.java","position":146,"original_position":146,"commit_id":"2c2bb3211790cc44cde6daf4084086183669dd6f","original_commit_id":"2c2bb3211790cc44cde6daf4084086183669dd6f","user":{"login":"anwar6953","id":2440977,"avatar_url":"https://avatars.githubusercontent.com/u/2440977?v=3","gravatar_id":"","url":"https://api.github.com/users/anwar6953","html_url":"https://github.com/anwar6953","followers_url":"https://api.github.com/users/anwar6953/followers","following_url":"https://api.github.com/users/anwar6953/following{/other_user}","gists_url":"https://api.github.com/users/anwar6953/gists{/gist_id}","starred_url":"https://api.github.com/users/anwar6953/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/anwar6953/subscriptions","organizations_url":"https://api.github.com/users/anwar6953/orgs","repos_url":"https://api.github.com/users/anwar6953/repos","events_url":"https://api.github.com/users/anwar6953/events{/privacy}","received_events_url":"https://api.github.com/users/anwar6953/received_events","type":"User","site_admin":false},"body":"Would it be worth it to also log the inputType?","created_at":"2015-07-02T19:11:29Z","updated_at":"2015-07-02T19:11:29Z","html_url":"https://github.com/caskdata/cdap/pull/3067#discussion_r33812232","pull_request_url":"https://api.github.com/repos/caskdata/cdap/pulls/3067","_links":{"self":{"href":"https://api.github.com/repos/caskdata/cdap/pulls/comments/33812232"},"html":{"href":"https://github.com/caskdata/cdap/pull/3067#discussion_r33812232"},"pull_request":{"href":"https://api.github.com/repos/caskdata/cdap/pulls/3067"}}},"pull_request":{"url":"https://api.github.com/repos/caskdata/cdap/pulls/3067","id":38900611,"html_url":"https://github.com/caskdata/cdap/pull/3067","diff_url":"https://github.com/caskdata/cdap/pull/3067.diff","patch_url":"https://github.com/caskdata/cdap/pull/3067.patch","issue_url":"https://api.github.com/repos/caskdata/cdap/issues/3067","number":3067,"state":"open","locked":false,"title":"[CDAP-2893] Log parser transform","user":{"login":"jayfjin","id":8236506,"avatar_url":"https://avatars.githubusercontent.com/u/8236506?v=3","gravatar_id":"","url":"https://api.github.com/users/jayfjin","html_url":"https://github.com/jayfjin","followers_url":"https://api.github.com/users/jayfjin/followers","following_url":"https://api.github.com/users/jayfjin/following{/other_user}","gists_url":"https://api.github.com/users/jayfjin/gists{/gist_id}","starred_url":"https://api.github.com/users/jayfjin/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jayfjin/subscriptions","organizations_url":"https://api.github.com/users/jayfjin/orgs","repos_url":"https://api.github.com/users/jayfjin/repos","events_url":"https://api.github.com/users/jayfjin/events{/privacy}","received_events_url":"https://api.github.com/users/jayfjin/received_events","type":"User","site_admin":false},"body":"JIRA - https://issues.cask.co/browse/CDAP-2893\r\nBUILD - http://builds.cask.co/browse/CDAP-DUT2134-2\r\n\r\nCustom Transform that parses various log formats (currently only CLF and S3) and extracts information such as URI, IP, browser, device, and time. Part of the Caskalytics project.","created_at":"2015-06-30T17:00:31Z","updated_at":"2015-07-02T19:11:29Z","closed_at":null,"merged_at":null,"merge_commit_sha":"9500e17a5b198c08ddff0235cc02eee14ab78cb4","assignee":null,"milestone":null,"commits_url":"https://api.github.com/repos/caskdata/cdap/pulls/3067/commits","review_comments_url":"https://api.github.com/repos/caskdata/cdap/pulls/3067/comments","review_comment_url":"https://api.github.com/repos/caskdata/cdap/pulls/comments{/number}","comments_url":"https://api.github.com/repos/caskdata/cdap/issues/3067/comments","statuses_url":"https://api.github.com/repos/caskdata/cdap/statuses/2c2bb3211790cc44cde6daf4084086183669dd6f","head":{"label":"caskdata:feature/Log-Parser-Transform","ref":"feature/Log-Parser-Transform","sha":"2c2bb3211790cc44cde6daf4084086183669dd6f","user":{"login":"caskdata","id":8123023,"avatar_url":"https://avatars.githubusercontent.com/u/8123023?v=3","gravatar_id":"","url":"https://api.github.com/users/caskdata","html_url":"https://github.com/caskdata","followers_url":"https://api.github.com/users/caskdata/followers","following_url":"https://api.github.com/users/caskdata/following{/other_user}","gists_url":"https://api.github.com/users/caskdata/gists{/gist_id}","starred_url":"https://api.github.com/users/caskdata/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/caskdata/subscriptions","organizations_url":"https://api.github.com/users/caskdata/orgs","repos_url":"https://api.github.com/users/caskdata/repos","events_url":"https://api.github.com/users/caskdata/events{/privacy}","received_events_url":"https://api.github.com/users/caskdata/received_events","type":"Organization","site_admin":false},"repo":{"id":22542759,"name":"cdap","full_name":"caskdata/cdap","owner":{"login":"caskdata","id":8123023,"avatar_url":"https://avatars.githubusercontent.com/u/8123023?v=3","gravatar_id":"","url":"https://api.github.com/users/caskdata","html_url":"https://github.com/caskdata","followers_url":"https://api.github.com/users/caskdata/followers","following_url":"https://api.github.com/users/caskdata/following{/other_user}","gists_url":"https://api.github.com/users/caskdata/gists{/gist_id}","starred_url":"https://api.github.com/users/caskdata/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/caskdata/subscriptions","organizations_url":"https://api.github.com/users/caskdata/orgs","repos_url":"https://api.github.com/users/caskdata/repos","events_url":"https://api.github.com/users/caskdata/events{/privacy}","received_events_url":"https://api.github.com/users/caskdata/received_events","type":"Organization","site_admin":false},"private":false,"html_url":"https://github.com/caskdata/cdap","description":"Cask 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