fscrawler: content is null when creating the most simple job

Hello. Thank you for this package. I’m trying it, but I keep getting null in the content, even for a plain text file containing plain text shadi. Could you give me some pointers on how I can get the content to show up? Other than the plain text file, I’d like to index .xlsx, .xls, and .pdf formats.

Here is my job settings file:

{
  "name" : "sic_list",
  "fs" : {
    "url" : "/data/fscrawler/files",
    "update_rate": "1m",
    "indexed_chars": "100%"
  },
  "elasticsearch" : {
    "index" : "sic_list",
    "type": "doc",
    "nodes" : [
      { "host" : "myhost.com", "port" : 9200 }
    ]
  }
}

and here is an excerpt from my --trace output

10:18:31,678 DEBUG [f.p.e.c.f.u.FsCrawlerUtil] filename = [test.txt], includes = [null], excludes = [null]
10:18:31,679 TRACE [f.p.e.c.f.u.FsCrawlerUtil] no rules
10:18:31,679 DEBUG [f.p.e.c.f.FsCrawlerImpl] [test.txt] can be indexed: [true]
10:18:31,679 DEBUG [f.p.e.c.f.FsCrawlerImpl]   - file: test.txt
10:18:31,680 DEBUG [f.p.e.c.f.FsCrawlerImpl] fetching content from [/data/fscrawler/files],[test.txt]
10:18:31,680 DEBUG [f.p.e.c.f.FsCrawlerImpl] Indexing in ES sic_list, doc, 57e81419ed4fa6aa86d668bb9e28674
10:18:31,681 TRACE [f.p.e.c.f.FsCrawlerImpl] JSon indexed : {
  "content" : null,
  "attachment" : null,
  "meta" : {
    "author" : null,
    "title" : null,
    "date" : null,
    "keywords" : null,
    "raw" : null
  },
  "file" : {
    "content_type" : null,
    "last_modified" : "2017-01-21T10:10:03Z",
    "indexing_date" : "2017-01-21T10:18:31.680Z",
    "filesize" : null,
    "filename" : "test.txt",
    "url" : "file:///data/fscrawler/files/test.txt",
    "indexed_chars" : null,
    "checksum" : null
  },
  "path" : {
    "encoded" : "6113a2c108ffc50c1fd761817d96ca7",
    "root" : "6113a2c108ffc50c1fd761817d96ca7",
    "virtual" : "",
    "real" : "/data/fscrawler/files/test.txt"
  },
  "attributes" : null
}

I’m running fscrawler from a dockerfile

FROM openjdk:alpine
RUN apk add --update openssl
RUN  wget https://repo1.maven.org/maven2/fr/pilato/elasticsearch/crawler/fscrawler/2.1/fscrawler-2.1.zip \
  && unzip fscrawler-2.1.zip
RUN mkdir ~/.fscrawler
WORKDIR ./fscrawler-2.1
ENTRYPOINT cp /data/fscrawler/home/* ~/.fscrawler -r \
        && bin/fscrawler --trace sic_list

with the following docker command

  docker build -t fscrawler build/fscrawler/
  docker run -it --rm --name fscrawler-siclist \
    -v /home/shadi/sic_lists/:/data/fscrawler/files/:ro \
    -v "${PWD}"/home/:/data/fscrawler/home/:ro \
    fscrawler

and all the files are readable by the same user launching fscrawler