fix JSON file output

[dogancanbakir]

Closes #176.

$ go run asnmap.go -a AS20940 -j -o output.json

   ___   _____  __              
  / _ | / __/ |/ /_ _  ___ ____ 
 / __ |_\ \/    /  ' \/ _  / _ \
/_/ |_/___/_/|_/_/_/_/\_,_/ .__/
                         /_/ 

                projectdiscovery.io

[INF] Current asnmap version v1.0.5 (latest)

$ cat output.json | jq | head -20
[
  {
    "timestamp": "2023-09-25 11:45:02.301681257 +0000 UTC",
    "input": "AS20940",
    "as_number": "AS20940",
    "as_name": "AKAMAI-ASN1",
    "as_country": "NL",
    "as_range": [
      "2.16.0.0/23",
      "2.16.2.0/24"
    ]
  },
  {
    "timestamp": "2023-09-25 11:45:02.301777549 +0000 UTC",
    "input": "AS20940",
    "as_number": "AS20940",
    "as_name": "AKAMAI-ASN1",
    "as_country": "NL",
    "as_range": [
      "2.16.4.0/22",

[Mzack9999]

Actually we do a lot of work:

Response => Result => Slice of results with manual marshaling => json line

Probably we can refactor the code so that each response mapped to a result results in a json line directly:

Response => intializeResult => Result => json line

[Mzack9999]

implementation: lgtm
tests fail because API gives 502

[ehsandeep]

• asnmap -j option write output in json format, we can update it write in json line format to keep it uniform like other pd tools.
• when -j option is used with -o, output gets written to only file but not displayed to stdout like other pd tools, we can fix that as well.

[ehsandeep]

CLI output gets written to file but not visible to stdout.

./asnmap -a AS20940 -o test