Apache Tika 1.16 TXTParser无法在sbt构建中检测字符编码

时间：2017-11-03 16:47:14

标签： scala sbt jena apache-tika sbt-assembly

我正在使用sbt程序集在Eclipse中构建一个项目。我有一个非常大而复杂的build.sbt文件，因为我有很多冲突。

使用tika 1.16中的PDF，OOXML和OpenDocument解析器，所有内容都适用于pdf，pptx，odt和docx文件。但是，当我尝试使用TXTParser解析txt文件（UTF-8编码）时，我收到以下错误：

org.apache.tika.exception.TikaException: Failed to detect the character encoding of a document
    at org.apache.tika.detect.AutoDetectReader.detect(AutoDetectReader.java:77)
    at org.apache.tika.detect.AutoDetectReader.<init>(AutoDetectReader.java:108)
    at org.apache.tika.detect.AutoDetectReader.<init>(AutoDetectReader.java:114)
    at org.apache.tika.parser.txt.TXTParser.parse(TXTParser.java:79)`

我的Scala代码中的这一行：

val content = theParser.parse(stream.open(), chandler, meta, pContext)

其中stream是PortableDataStream，chandler是一个新的BodyContentHandler，meta是一个新的元数据，而pContext是一个新的ParseContext。

如果我使用AutoDetectParser而得到以下错误：

org.apache.jena.shared.SyntaxError: unknown
    at org.apache.jena.rdf.model.impl.NTripleReader.read(NTripleReader.java:73)
    at org.apache.jena.rdf.model.impl.NTripleReader.read(NTripleReader.java:58)
    at org.apache.jena.rdf.model.impl.ModelCom.read(ModelCom.java:305)

我的Scala代码中的这一行：

val response = model.read(stream, null, "N-TRIPLES")

其中stream是一个InputStream。

我认为这是由于Tika的反应空洞（所以同样的问题）。

我很确定这可能是我过于复杂的build.sbt文件中的依赖问题，但经过几个小时的尝试后，我肯定需要帮助。

一个好处是，如果没有输入txt文件，一切都能正常运行，所以这可能是我的上一期！

最后，这是我使用sbt clean assembly构建的build.sbt文件：

scalaVersion := "2.11.8"
version      := "1.0.0"
name := "crawldocs"
conflictManager := ConflictManager.strict
mainClass in assembly := Some("com.addlesee.crawling.CrawlHiccup")
libraryDependencies ++= Seq(
  "org.apache.tika" % "tika-core" % "1.16",
  "org.apache.tika" % "tika-parsers" % "1.16" excludeAll(
    ExclusionRule(organization = "*", name = "guava")
  ),
    "com.blazegraph" % "bigdata-core" % "2.0.0" excludeAll(
    ExclusionRule(organization = "*", name = "collection-0.7"),
    ExclusionRule(organization = "*", name = "commons-cli"),
    ExclusionRule(organization = "*", name = "commons-codec"),
    ExclusionRule(organization = "*", name = "commons-csv"),
    ExclusionRule(organization = "*", name = "commons-io"),
    ExclusionRule(organization = "*", name = "commons-lang3"),
    ExclusionRule(organization = "*", name = "commons-logging"),
    ExclusionRule(organization = "*", name = "httpclient"),
    ExclusionRule(organization = "*", name = "httpclient-cache"),
    ExclusionRule(organization = "*", name = "httpcore"),
    ExclusionRule(organization = "*", name = "httpmime"),
    ExclusionRule(organization = "*", name = "jackson-annotations"),
    ExclusionRule(organization = "*", name = "jackson-core"),
    ExclusionRule(organization = "*", name = "jackson-databind"),
    ExclusionRule(organization = "*", name = "jcl-over-slf4j"),
    ExclusionRule(organization = "*", name = "jena-cmds"),
    ExclusionRule(organization = "*", name = "jena-rdfconnection"),
    ExclusionRule(organization = "*", name = "jena-tdb"),
    ExclusionRule(organization = "*", name = "jsonld-java"),
    ExclusionRule(organization = "*", name = "libthrift"),
    ExclusionRule(organization = "*", name = "log4j"),
    ExclusionRule(organization = "*", name = "slf4j-api"),
    ExclusionRule(organization = "*", name = "slf4j-log4j12"),
    ExclusionRule(organization = "*", name = "xercesImpl"),
    ExclusionRule(organization = "*", name = "xml-apis")
  ),
    "org.scalaj" %% "scalaj-http" % "2.3.0",
  "org.apache.jena" % "apache-jena" % "3.4.0" excludeAll(
    ExclusionRule(organization = "*", name = "commons-cli"),
    ExclusionRule(organization = "*", name = "commons-codec"),
    ExclusionRule(organization = "*", name = "commons-csv"),
    ExclusionRule(organization = "*", name = "commons-lang3"),
    ExclusionRule(organization = "*", name = "httpclient"),
    ExclusionRule(organization = "*", name = "httpclient-cache"),
    ExclusionRule(organization = "*", name = "httpcore"),
    ExclusionRule(organization = "*", name = "jackson-core"),
    ExclusionRule(organization = "*", name = "jackson-databind"),
    ExclusionRule(organization = "*", name = "jcl-over-slf4j"),
    ExclusionRule(organization = "*", name = "jena-rdfconnection"),
    ExclusionRule(organization = "*", name = "slf4j-api")
  ),
    "org.apache.jena" % "apache-jena-libs" % "3.4.0" excludeAll(
    ExclusionRule(organization = "*", name = "commons-cli"),
    ExclusionRule(organization = "*", name = "commons-codec"),
    ExclusionRule(organization = "*", name = "commons-csv"),
    ExclusionRule(organization = "*", name = "commons-lang3"),
    ExclusionRule(organization = "*", name = "httpclient"),
    ExclusionRule(organization = "*", name = "httpclient-cache"),
    ExclusionRule(organization = "*", name = "httpcore"),
    ExclusionRule(organization = "*", name = "jackson-core"),
    ExclusionRule(organization = "*", name = "jackson-databind"),
    ExclusionRule(organization = "*", name = "jcl-over-slf4j"),
    ExclusionRule(organization = "*", name = "jena-rdfconnection"),
    ExclusionRule(organization = "*", name = "slf4j-api")
  ),
    "org.noggit" % "noggit" % "0.6",
    "com.typesafe.scala-logging" %% "scala-logging" % "3.7.2" excludeAll(
    ExclusionRule(organization = "*", name = "slf4j-api")
  ),
  "org.apache.spark" % "spark-core_2.11" % "2.2.0" excludeAll(
    ExclusionRule(organization = "*", name = "breeze_2.11"),
    ExclusionRule(organization = "*", name = "hadoop-hdfs"),
    ExclusionRule(organization = "*", name = "hadoop-annotations"),
    ExclusionRule(organization = "*", name = "hadoop-common"),
    ExclusionRule(organization = "*", name = "hadoop-mapreduce-client-app"),
    ExclusionRule(organization = "*", name = "hadoop-mapreduce-client-common"),
    ExclusionRule(organization = "*", name = "hadoop-mapreduce-client-core"),
    ExclusionRule(organization = "*", name = "hadoop-mapreduce-client-jobclient"),
    ExclusionRule(organization = "*", name = "hadoop-mapreduce-client-shuffle"),
    ExclusionRule(organization = "*", name = "hadoop-yarn-api"),
    ExclusionRule(organization = "*", name = "hadoop-yarn-client"),
    ExclusionRule(organization = "*", name = "hadoop-yarn-common"),
    ExclusionRule(organization = "*", name = "hadoop-yarn-server-common"),
    ExclusionRule(organization = "*", name = "hadoop-yarn-server-web-proxy"),
    ExclusionRule(organization = "*", name = "activation"),
    ExclusionRule(organization = "*", name = "hive-exec"),
    ExclusionRule(organization = "*", name = "scala-compiler"),
    ExclusionRule(organization = "*", name = "spire_2.11"),
    ExclusionRule(organization = "*", name = "commons-compress"),
    ExclusionRule(organization = "*", name = "slf4j-api"),
    ExclusionRule(organization = "*", name = "guava"),
    ExclusionRule(organization = "*", name = "commons-codec"),
    ExclusionRule(organization = "*", name = "commons-io"),
    ExclusionRule(organization = "*", name = "gson"),
    ExclusionRule(organization = "*", name = "httpclient"),
    ExclusionRule(organization = "*", name = "zookeeper"),
    ExclusionRule(organization = "*", name = "jettison"),
    ExclusionRule(organization = "*", name = "jackson-core"),
    ExclusionRule(organization = "*", name = "httpcore"),
    ExclusionRule(organization = "*", name = "bcprov-jdk15on"),
    ExclusionRule(organization = "*", name = "jul-to-slf4j"),
    ExclusionRule(organization = "*", name = "jcl-over-slf4j"),
    ExclusionRule(organization = "*", name = "commons-cli"),
    ExclusionRule(organization = "*", name = "slf4j-log4j12"),
    ExclusionRule(organization = "*", name = "curator-framework")
  ),
  "org.scala-lang" % "scala-xml" % "2.11.0-M4",
  "org.apache.hadoop" % "hadoop-mapreduce-client-core" % "2.7.3" excludeAll(
    ExclusionRule(organization = "*", name = "commons-codec"),
    ExclusionRule(organization = "*", name = "commons-cli"),
    ExclusionRule(organization = "*", name = "slf4j-api"),
    ExclusionRule(organization = "*", name = "commons-io"),
    ExclusionRule(organization = "*", name = "jettison"),
    ExclusionRule(organization = "*", name = "avro"),
    ExclusionRule(organization = "*", name = "commons-compress"),
    ExclusionRule(organization = "*", name = "slf4j-log4j12"),
    ExclusionRule(organization = "*", name = "netty")
  ),
  "org.apache.hadoop" % "hadoop-common" % "2.7.3" excludeAll(
    ExclusionRule(organization = "*", name = "commons-codec"),
    ExclusionRule(organization = "*", name = "commons-cli"),
    ExclusionRule(organization = "*", name = "slf4j-api"),
    ExclusionRule(organization = "*", name = "commons-math3"),
    ExclusionRule(organization = "*", name = "commons-io"),
    ExclusionRule(organization = "*", name = "jets3t"),
    ExclusionRule(organization = "*", name = "gson"),
    ExclusionRule(organization = "*", name = "avro"),
    ExclusionRule(organization = "*", name = "httpclient"),
    ExclusionRule(organization = "*", name = "zookeeper"),
    ExclusionRule(organization = "*", name = "commons-compress"),
    ExclusionRule(organization = "*", name = "slf4j-log4j12"),
    ExclusionRule(organization = "*", name = "commons-net"),
    ExclusionRule(organization = "*", name = "curator-recipes"),
    ExclusionRule(organization = "*", name = "jsr305")
  )
)
assemblyMergeStrategy in assembly := {
 case PathList("META-INF", xs @ _*) => MergeStrategy.discard
 case x => MergeStrategy.first
}

2 个答案:

答案 0 :(得分：2)

上面的代码调用旧的N-triples解析，该解析仅出于遗留原因而存在。旧读者只是ASCII。 UTF-8会打破它。

没有处理apache-jena-libs（类型= pom），或者你正在重新包装jar并且没有处理Java的ServiceLoader放置文件的META-INF /服务。 Jena使用它进行初始化。您必须通过连接相同名称的文件来组合META_INF / service / *文件。

详细信息：https://jena.apache.org/documentation/notes/jena-repack.html

答案 1 :(得分：0)

最后修好......

我在MergeStrategy中添加了case x if x.contains("EncodingDetector") => MergeStrategy.deduplicate ABOVE丢弃行。 build.sbt底部的以下assemblyMergeStrategy解决了我的问题：

assemblyMergeStrategy in assembly := {
 case x if x.contains("EncodingDetector") => MergeStrategy.deduplicate
 case PathList("META-INF", xs @ _*) => MergeStrategy.discard
 case x => MergeStrategy.first
}
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