Steffen created TIKA-1291:
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Summary: Invalid JSON output on CLI
Key: TIKA-1291
URL: https://issues.apache.org/jira/browse/TIKA-1291
Project: Tika
Issue Type: Bug
Components: cli, metadata
Affects Versions: 1.5, 1.4
Reporter: Steffen
Getting the metadata via CLI from tika with output format set to JSON gives
sometimes invalid JSON. I only found float/array errors here in jira and thus
created this ticket with a new case.
In my case the file that lead to invalid JSON output was a PNG file (that I
unfortunately can't provide for testing):
{noformat}
{ "Application Record Version":4,
"Component 1":"Y component: Quantization table 0, Sampling factors 2 horiz/2
vert",
"Component 2":"Cb component: Quantization table 1, Sampling factors 1 horiz/1
vert",
"Component 3":"Cr component: Quantization table 1, Sampling factors 1 horiz/1
vert",
"Compression Type":"Baseline",
"Content-Length":113081,
"Content-Type":"image/jpeg",
"Data Precision":"8 bits",
"IPTC-NAA record":"24 bytes binary data",
"Image Height":"479 pixels",
"Image Width":"671 pixels",
"Number of Components":3,
"Resolution Units":"inch",
"Unknown tag (0x02f0)":35,0,556,479,
"X Resolution":"220 dots",
"Y Resolution":"220 dots",
"resourceName":18,
"tiff:BitsPerSample":8,
"tiff:ImageLength":479,
"tiff:ImageWidth":671 }
{noformat}
The {noformat}"Unknown tag (0x02f0)":35,0,556,479, {noformat} is invalid JSON.
It would be nice if there's always valid json output from tika. For other cases
that might not be catched via fixes by this ticket it would be nice to have a
CLI argument/option that disables the output of certain (unknown?) fields or
allows giving a whitelist of fieldnames to output. That way users can bridge
the time until new releases of tika by being more specific on the shell. If
that feature already exists I apology for not having found it directly and a
hint to the CLI option would be nice.
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