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gf_images_id.go
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/
gf_images_id.go
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/*
GloFlow application and media management/publishing platform
Copyright (C) 2019 Ivan Trajkovic
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package gf_images_core
import (
"fmt"
"net/url"
"time"
"crypto/md5"
"encoding/hex"
"github.com/gloflow/gloflow/go/gf_core"
)
//---------------------------------------------------
type Gf_image_id string // DEPRECATED!! - switch to using GF_image_id fully
type GF_image_id = Gf_image_id
type GFimageID = GF_image_id
//---------------------------------------------------
// CREATES_ID
func CreateIDfromURL(pImageURLstr string,
pRuntimeSys *gf_core.RuntimeSys) (GFimageID, *gf_core.GFerror) {
// urlparse() - used so that any possible url query parameters are not used in the
// os.path.basename() result
url, err := url.Parse(pImageURLstr)
if err != nil {
gfErr := gf_core.ErrorCreate("failed to parse image_url to create image ID",
"url_parse_error",
map[string]interface{}{"image_url_str": pImageURLstr,},
err, "gf_images_core", pRuntimeSys)
return "", gfErr
}
imageHostStr := url.Host
imagePathStr := url.Path
imageURIstr := fmt.Sprintf("%s/%s", imageHostStr, imagePathStr)
//-------------
imageIDstr := CreateImageID(imageURIstr,
pRuntimeSys)
//-------------
return imageIDstr, nil
}
//---------------------------------------------------
// CREATES_ID
func CreateImageID(pImageURIstr string,
pRuntimeSys *gf_core.RuntimeSys) GFimageID {
h := md5.New()
currentUNIXtimeF := float64(time.Now().UnixNano())/1000000000.0
h.Write([]byte(fmt.Sprint(currentUNIXtimeF)))
h.Write([]byte(pImageURIstr))
sum := h.Sum(nil)
hex_str := hex.EncodeToString(sum)
gfImageIDstr := GFimageID(hex_str)
return gfImageIDstr
}