Perl decode json malformed json string


Introduction to Perl JSON

The Perl JSON is one of the features and it is used to convert the Perl script functions and features like data structure to JSON UTF-8 encoded binary strings. And these values are the pre-defined formats that will be supported to all the languages by using some modules. The Perl data will be automatically converted to the JSON string that can be expected and tries to parse the same strings returning with reference results using TO_JSON() method the object classes are converted to the JSON by using JSON: parse method the string values are parsing and constructing the values or objects which is described by the strings.


The Perl scripts have default keywords, variables, and methods for creating the applications more sophisticated. Generally, the JSON is used for storing and exchanging the data. It is a JavaScript Object Notation by using JSON default functions the Perl data are converted to the appropriate strings.

#!/usr/bin/perl package package name; use JSON; $var=(“”); $var1=$JSON->default methods(encode,decode,to_json,from_json)($var1);

—some Perl script logics based on the requirement—

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The above codes are the basic syntax for utilizing the JSON in Perl scripts after converting the JSON strings the values are returned with the same strings.

How JSON work in Perl?

In Perl script, we can convert the data to the JSON string by using some predefined modules it can be achieved with the script. The JSON::PP, JSON::XS, JSON, JSON::Meth, JSON: Syck, JSON, Cpanel::JSON::XS, Mojo::JSON, JSON::MaybeXS are the modules which has to be implemented with JSON in Perl. The encode_json, decode_json, to_json, from_json, convert_blessed are the functions that have to be used for encoding and decoding the JSON objects using the Perl programming language. When we use encode_json method is converted the given Perl data structure to the UTF-8 encoded with binary strings. So these encoded techniques will be more useful for encrypting the data and it is secured purpose for web-based applications. Likewise, the decode_json is used for decoding the encrypted values that is decoding the JSON strings. When we use to_json() method it converts the Perl data structures to the JSON strings so the from_json() method expects the same JSON string values and tries to parse it and it returns the reference results. The convert_blessed method is like the other JSON function which has set the true values and the scripts can be used for calling the to_json it converts the object classes to the JSON.


Let us discuss examples of Perl JSON.

Example #1

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#!/usr/bin/perl package first; sub new { my $vars = shift; my $vars1 = { examp=> shift, exampl1 => shift, examp2 => shift, examp22 => shift, examp23 => shift, examp24 => shift, examp25 => shift, }; bless $vars1, $vars; return $vars1; } sub TO_JSON { return { %{ shift() } }; } package second; use JSON; my $JSON = JSON->new->utf8; $JSON->convert_blessed(4); $vars2 = new first( “siva”, “IT”, “TUP”, “MAS”, “jhv”, “ajdgshj”, “sbjs”, “sdjb”, “jhdj”,”gsdjv”, “mshdj”, “jkskhb”); $vars3 = $JSON->encode($vars2); print “Welcome to My Domain your details n$vars3n”;


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In the above example we used JSON pre-defined functions like encoding the string values that will be passing into the variables with an encrypted form that the given user input data are converted to the UTF-8 encoded format it is mainly supported with the other languages and it can be accommodated using the web pages and forms. These encodes are supported with the width of the variable type specified characters that can be capable for all valid code points it supported the 8-bit binary bytes and it is a standard one.

Example #2

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#!/usr/bin/perl use JSON; use Data::Dumper; $vars = ‘{“ndkj”:79841,”bdhkjf”:2784,”cdfb”:3556,”dkerjhfjk”:4556,”ejkhe5krj”:874,”jsdhkb”:84767,”sdhfjb”:467,”sdj”:6487}’; $vars1 = decode_json($vars); print Dumper($vars1); $vars = ‘{“ndsfdkj”:7945841,”basdasddhkjf”:273484,”casdfgdfb”:3552346,”dkerjhAS fjk”:45556,”ejkhe5krj”:8744,”jsdhkb”:84767,”sdSDhfjb”:467,”sdDj”:6487}’; $vars1 = decode_json($vars); print Dumper($vars1); $vars = ‘{“6347j”:7789841,”basdhkjf”:2784,”cdfb”:3556,”dkerjhfjk”:4556,”ejkhe5krj”:874,”jsdhkb”:84767,”sdhfjb”:467,”sdj”:6487}’; $vars1 = decode_json($vars); print Dumper($vars1); $vars = ‘{“n7367t6kj”:79788841,”basdhkjf”:276784,”cdfb”:3556,”dkerjhfjk”:4556,”ejkhe5krj”:874,”jsdhkb”:84767,”sdhfjb”:467,”sdj”:6487}’; $vars1 = decode_json($vars); print Dumper($vars1); $vars = ‘{“ndk23787rj”:79898741,”bdashkjf”:273484,”cdfb”:3556,”dkerjhfjk”:4556,”ejkhe5krj”:874,”jsdhkb”:84767,”sdhfjb”:467,”sdj”:6487}’; $vars1 = decode_json($vars); print Dumper($vars1); $vars = ‘{“nd324fdkj”:7980987841,”bdhaskjf”:278456,”cdfb”:3556,”dkerjhfjk”:4556,”ejkhe5krj”:874,”jsdhkb”:84767,”sdhfjb”:467,”sdj”:6487}’; $vars1 = decode_json($vars); print Dumper($vars1);


Perl JSON 2

In the Second example we used decode_json method for decoding the strings after entering the data in the encode_json. By using these decode methods the UTF-8 binary format strings are tried and parsing to convert that as a UTF-8 encoded JSON text formats. We used an additional default function called Dumper that will be used for print the Perl variables values in the JSON format. It has followed with the key-value pairs technique the key must be unique and the values are changed dynamically in the script. For each key point out the separate values in the variable location, it can be allotted as the separate reference in the memory.

Example #3

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#!/usr/bin/perl use JSON; use utf8; use strict; use warnings; my $vars = ‘{ “first”: { “strngs1”: “duifgjdfj”, “strngs2”: “dsvjfh”, “strngs3”: “ashfk”, “strngs4”: 4354 }, “second”: { “strngs1”: “hsdkjb”, “strngs2”: “hsdjbv”, “strngs3”: “hskbjd”, “strngs4”: 4357 }, “third”: { “strngs1”: “ashkdfj”, “strngs2”: “jasgdjb”, “strngs3”: “kshdfb”, “strngs4”: 4358 } }’; my $vars1 = decode_json $vars; foreach my $vars2 (keys %$vars1) { print “$vars2n”; } print “Welcome To My Domain $vars1->{first}->{strngs2}n”;


Perl JSON 3

In third example, we have used the basic JSON output values from the variables. By using forEach loop we have iterate the keys and values and print the same in the output console. Likewise, the JSON strings are modified with both integers, and string characters are parsed in the variables using use strict. use JSON, the JSON methods are inherited and used with the Perl scripts. Here we used keys to iterating the values in the forEach loop when we called the specific key for the variables then the values of the attributes are displayed on the screen.


In the concluded part JSON is the format which has received by the web users after sending the request to the server, the server response is the XML or JSON format. Like that the Perl script matches and using the JSON format strings in the Perl applications in various ways. By using the default modules of the Perl JSON it handles the inputs and using the default methods the data are operated and converted the script data’s to the JSON format.

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This is a guide to Perl JSON. Here we discuss the introduction, syntax, How JSON works in Perl, and examples with code implementation. You may also have a look at the following articles to learn more –

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