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Convert JSON to Perl hash without perl modules

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Convert JSON to Perl hash without perl modulesPosted: Monday, October 8, 2018 [21:44:13] - 1
rootPosted by:rootMember Since:
June 16 2010Posts: 357
If you have a simple task of converting JSON to Perl hash in the middle of the program - it could be a simple task of running a simple regex:
View Code
my $json = '{
"id": "myid_transaction",
"object": "balance",
"amount": 9.95,
"available": 1739212000,
"created": 1738932756,
"currency": "usd",
"description": "sample transaction",
"fee": 18,
"fee_details": [
{
"amount": 18,
"application": null,
"currency": "usd",
"description": "Processing fees",
"type": "processing_fee"
}
],
"net": 7.77,
"source": "src_trans",
"sourced_transfers": {
"object": "list",
"data": [

],
"has_more": false,
"total_count": 0,
"url": "this_url_value"
},
"status": "pending",
"type": "charge"
}';
$json =~ s/^\{+//;$json =~ s/^(\n+|\r+)//;$json =~ s/^\s+//;
$json =~ s/\s+$//;$json =~ s/\}$//;
$json =~ s/\012/\n/g;$json =~ s/\015/\n/g;
$json =~ s/\000/\n/g;$json =~ tr/\n\n//s;
$json =~ s/\: /\:/g;$json =~ s/(\n)(\s{2})/\n/g;
$json =~ s/(\n)( )/$1\t/g;$json =~ s/ /SP/g;
$json =~ s/(SPSP)/\t/g;$json =~ s/(\:)(\{)/ \=\> $2/g;
$json =~ s/\:/\,/g;$json =~ s/\s+$//;$json =~ s/SP/ /g;
open(TXT,">/data/base/current.txt");print TXT "\%hash = (\n$json\n);\n";close(TXT);

resulting written hash will be:
View Code
"id","myid_transaction",
"object","balance",
"amount",9.95,
"available",1739212000,
"created",1738932756,
"currency","usd",
"description","sample transaction",
"fee",18,
"fee_details",[
{
"amount",18,
"application",null,
"currency","usd",
"description","Processing fees",
"type","processing_fee"
}
],
"net",7.77,
"source","src_trans",
"sourced_transfers" => {
"object","list",
"data",[
],
"has_more",false,
"total_count",0,
"url","this_url_value"
},
"status","pending",
"type","charge"

Then, data can be loaded later with simple "require" request:
View Code
eval {require '/data/base/current.txt'};

and used as a regular Perl hash: %hashThere's no place like ~
Accessing hash keys and valuesPosted: Monday, October 8, 2018 [22:54:10] - 2
rootPosted by:rootMember Since:
June 16 2010Posts: 357
Accessing values is a straight-forward process if you know keys beforehand. Otherwise it could be a wild guess.
When keys are known here is how to access values:
View Codeprint "Amount: $hash{amount}\n"; # Amount: 9.95
print "Fee Description: $hash{fee_details}[0]{description}\n"; # Fee Description: Processing fees
print "Fee Type: $hash{fee_details}[0]{type}\n"; # Fee Type: processing_fee
print "Sourced Transfers URL: $hash{sourced_transfers}{url}\n"; # Sourced Transfers URL: this_url_value
print "Status: $hash{status}\n"; # Status: pending

if keys are unknown - you can manually study the hash structure or white a custom program to retrieve data properly.There's no place like ~
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