Apache Tika 1.16 TXTParser 无法检测 sbt 构建中的字符编码

Question

我正在使用 sbt 程序集在 Eclipse 中构建一个项目。我有一个非常大且复杂的 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，对于 pdf、pptx、odt 和 docx 文件一切正常。但是，当我尝试使用 TXTParser 解析 txt 文件（UTF-8 编码）时，出现以下错误：

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)`

来自我的 Scala 代码中的这一行：

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

其中 stream 是一个 PortableDataStream，chandler 是一个新的 BodyContentHandler，meta 是一个新的 Metadata，pContext 是一个新的 ParseContext。

如果我改用 AutoDetectParser，则会收到以下错误：

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)

来自我的 Scala 代码中的这一行：

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

其中流是 InputStream。

我认为这是由于 Tika 的空响应（所以是同样的问题）。

我很确定这可能是我过于复杂的 build.sbt 文件中的依赖性问题，但经过许多小时的尝试，我确实需要帮助。

一个积极的方面是，如果没有输入 txt 文件，一切都会完美无缺，所以这可能是我的最后一期了！

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
}

Answer 1

上面的代码调用了仅出于遗留原因而存在的旧 N 元组分析。旧的 reader 只是 ASCII。 UTF-8 会破坏它。

apache-jena-libs（即 type=pom）未被处理，或者您正在重新打包 jar 并且尚未处理 Java 的 ServiceLoader 放置文件的 META-INF/service . Jena 使用它进行初始化。您必须通过连接同名文件来合并 META_INF/service/* 文件。

详情：https://jena.apache.org/documentation/notes/jena-repack.html

Answer 2

终于修复了...

我在 MergeStrategy 的丢弃行上方添加了 case x if x.contains("EncodingDetector") => MergeStrategy.deduplicate。 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
}

Apache Tika 1.16 TXTParser 无法检测 sbt 构建中的字符编码

Apache Tika 1.16 TXTParser Failed to detect character encoding in sbt build

scala

jena

sbt

apache-tika

sbt-assembly