| JSON_XS(1) | User Contributed Perl Documentation | JSON_XS(1) |
NAME¶
json_xs - JSON::XS commandline utility
SYNOPSIS¶
json_xs [-v] [-f inputformat] [-t outputformat]
DESCRIPTION¶
json_xs converts between some input and output formats (one of them is JSON).
The default input format is "json" and the default output format is "json-pretty".
OPTIONS¶
- -v
- Be slightly more verbose.
- -f fromformat
- Read a file in the given format from STDIN.
"fromformat" can be one of:
- json - a json text encoded, either utf-8, utf16-be/le, utf32-be/le
- cbor - CBOR (RFC 7049, CBOR::XS), a kind of binary JSON
- storable - a Storable frozen value
- storable-file - a Storable file (Storable has two incompatible formats)
- bencode - use Convert::Bencode, if available (used by torrent files, among others)
- clzf - Compress::LZF format (requires that module to be installed)
- eval - evaluate the given code as (non-utf-8) Perl, basically the reverse of "-t dump"
- yaml - YAML format (requires that module to be installed)
- string - do not attempt to decode the file data
- none - nothing is read, creates an "undef" scalar - mainly useful with "-e"
- -t toformat
- Write the file in the given format to STDOUT.
"toformat" can be one of:
- json, json-utf-8 - json, utf-8 encoded
- json-pretty - as above, but pretty-printed
- json-utf-16le, json-utf-16be - little endian/big endian utf-16
- json-utf-32le, json-utf-32be - little endian/big endian utf-32
- cbor - CBOR (RFC 7049, CBOR::XS), a kind of binary JSON
- cbor-packed - CBOR using extensions to make it smaller
- storable - a Storable frozen value in network format
- storable-file - a Storable file in network format (Storable has two incompatible formats)
- bencode - use Convert::Bencode, if available (used by torrent files, among others)
- clzf - Compress::LZF format
- yaml - YAML::XS format
- dump - Data::Dump
- dumper - Data::Dumper
- string - writes the data out as if it were a string
- none - nothing gets written, mainly useful together with "-e"
- Note that Data::Dumper doesn't handle self-referential data structures correctly - use "dump" instead.
- -e code
- Evaluate perl code after reading the data and before writing it out again - can be used to filter, create or extract data. The data that has been written is in $_, and whatever is in there is written out afterwards.
EXAMPLES¶
json_xs -t none <isitreally.json
"JSON Lint" - tries to parse the file isitreally.json as JSON - if it is valid JSON, the command outputs nothing, otherwise it will print an error message and exit with non-zero exit status.
<src.json json_xs >pretty.json
Prettify the JSON file src.json to dst.json.
json_xs -f storable-file <file
Read the serialised Storable file file and print a human-readable JSON version of it to STDOUT.
json_xs -f storable-file -t yaml <file
Same as above, but write YAML instead (not using JSON at all :)
json_xs -f none -e '$_ = [1, 2, 3]'
Dump the perl array as UTF-8 encoded JSON text.
<torrentfile json_xs -f bencode -e '$_ = join "\n", map @$_, @{$_->{"announce-list"}}' -t string
Print the tracker list inside a torrent file.
lwp-request http://cpantesters.perl.org/show/JSON-XS.json | json_xs
Fetch the cpan-testers result summary "JSON::XS" and pretty-print it.
AUTHOR¶
Copyright (C) 2008 Marc Lehmann <json@schmorp.de>
| 2020-10-28 | perl v5.38.2 |