James Bardin
41d926745a
- There seems to be a relatively common corrupt tag which has an offset of MaxUint32. This is probably not a valid offset, so return early before we allocate a slice this large. - Read tag values into a bytes.Buffer. This will prevent allocating memory beyond the size of the image file in the event that a tag is invalid or corrupt. - Fixes issue #20
goexif
Provides decoding of basic exif and tiff encoded data. Still in alpha - no guarantees. Suggestions and pull requests are welcome. Functionality is split into two packages - "exif" and "tiff" The exif package depends on the tiff package. Documentation can be found at http://godoc.org/github.com/rwcarlsen/goexif
Like goexif? - Bitcoin tips welcome: 17w65FVqx196Qp7tfCCSLqyvsHUhiEEa7P
To install, in a terminal type:
go get github.com/rwcarlsen/goexif/exif
Or if you just want the tiff package:
go get github.com/rwcarlsen/goexif/tiff
Example usage:
package main
import (
"fmt"
"log"
"os"
"github.com/rwcarlsen/goexif/exif"
"github.com/rwcarlsen/goexif/mknote"
)
func ExampleDecode() {
fname := "sample1.jpg"
f, err := os.Open(fname)
if err != nil {
log.Fatal(err)
}
// Optionally register camera makenote data parsing - currently Nikon and
// Canon are supported.
exif.RegisterParsers(mknote.All...)
x, err := exif.Decode(f)
if err != nil {
log.Fatal(err)
}
camModel, _ := x.Get(exif.Model) // normally, don't ignore errors!
fmt.Println(camModel.StringVal())
focal, _ := x.Get(exif.FocalLength)
numer, denom, _ := focal.Rat2(0) // retrieve first (only) rat. value
fmt.Printf("%v/%v", numer, denom)
// Two convenience functions exist for date/time taken and GPS coords:
tm, _ := x.DateTime()
fmt.Println("Taken: ", tm)
lat, long, _ := x.LatLong()
fmt.Println("lat, long: ", lat, ", ", long)
}