A primitive Go binding for libexif.
go get github.com/gosexy/exif
Install the package with go get and use import to include it in your project.
import "github.com/gosexy/exif"
This is an example on how to read EXIF data from a file:
package main
import "fmt"
import "github.com/gosexy/exif"
func main() {
// open an exif reader and read the file from system
reader := exif.New()
err := reader.Open("_examples/resources/test.jpg")
// check to make sure we can read the exif data
if err != nil {
fmt.Printf("Error: %s", err.Error())
}
// print out key,val pair for each tag
for key, val := range reader.Tags {
fmt.Printf("%s: %s\n", key, val)
}
}
If you just have the image available as an io.Reader, you can parse the EXIF header like this:
reader := exif.New()
_, err = io.Copy(reader, data)
// exif.FoundExifInData is a signal that the EXIF parser has all it needs,
// it doesn't need to be given the whole image.
if err != nil && err != exif.FoundExifInData {
t.Fatalf("Error loading bytes: %s", err.Error())
}
err := reader.Parse()
if err != nil {
t.Fatalf("Error parsing EXIF: %s", err.Error())
}
for key, val := range reader.Tags {
fmt.Printf("%s: %s\n", key, val)
}
There is currently no support for writing EXIF data to images, however if someone would care to make the effort it would be great.
This is Open Source released under the terms of the MIT License:
Copyright (c) 2012-2013 José Carlos Nieto, http://xiam.menteslibres.org/
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.