Go – Rob Allen's DevNotes

Converting JSON to a struct in Go

I'm in the process of writing a little command line app in Go that uploads images to Flickr. It's called Rodeo and it's working well as a project with which to learn Go in 2020. Rodeo uses ExifTool to interrogate an image file for meta data. ExifTool is wonderful and very comprehensive and with the -j switch can return JSON. Today I want to note down what I learned about dealing with JSON.

$ exiftool -j -iptc:* -exif:* RKA-glorious.jpeg
[{
  "SourceFile": "RKA-glorious.jpeg",
  "Country-PrimaryLocationName": "United Kingdom",
  "Caption-Abstract": "On a wet gala weekend, Glorious returns after its 2018-19 restoration",
  "Keywords": ["diesel","50 033","Severn Valley Railway","Glorious","railway"],
  "ObjectName": "Glorious Sunrise",
  "ImageDescription": "On a wet gala weekend, Glorious returns after its 2018-19 restoration",
  "Make": "FUJIFILM",
  "Model": "X-T3",
  "ISO": 500,
  "DateTimeOriginal": "2019:10:04 11:50:40",
  "ShutterSpeedValue": "1/1000",
  "ApertureValue": 4.0,
  ...
}]

$ exiftool -j -iptc:* -exif:* RKA-glorious.jpeg

[{

"SourceFile": "RKA-glorious.jpeg",

"Country-PrimaryLocationName": "United Kingdom",

"Caption-Abstract": "On a wet gala weekend, Glorious returns after its 2018-19 restoration",

"Keywords": ["diesel","50 033","Severn Valley Railway","Glorious","railway"],

"ObjectName": "Glorious Sunrise",

"ImageDescription": "On a wet gala weekend, Glorious returns after its 2018-19 restoration",

"Make": "FUJIFILM",

"Model": "X-T3",

"ISO": 500,

"DateTimeOriginal": "2019:10:04 11:50:40",

"ShutterSpeedValue": "1/1000",

"ApertureValue": 4.0,

...

}]

(For… continue reading.

Posted on 3 June 2020 in Go View all 5 comments

Category: Go

Converting JSON to a struct in Go

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