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upload.go
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upload.go
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package handler
import (
"fmt"
"net/http"
"path"
"strconv"
"github.com/dmitrymomot/media-srv/repository"
"github.com/dmitrymomot/media-srv/storage"
"github.com/google/uuid"
"github.com/pkg/errors"
"github.com/thedevsaddam/govalidator"
)
// Upload new item and resize according to passed parameters
func (h *Handler) Upload(w http.ResponseWriter, r *http.Request) error {
rules := govalidator.MapData{
"file:image": []string{"required", "ext:png", "size:2097152", "mime:image/png"},
"height": []string{"required", "numeric", "numeric_between:32,512"},
"width": []string{"required", "numeric", "numeric_between:32,512"},
}
if err := validate(r, rules, nil); err != nil {
return err
}
height, _ := strconv.Atoi(r.FormValue("height"))
width, _ := strconv.Atoi(r.FormValue("width"))
file, header, err := r.FormFile("image")
defer file.Close()
// Store original image
tx, err := h.db.Begin()
if err != nil {
return errors.Wrap(err, "begin db transaction")
}
query := h.query.WithTx(tx)
oid := uuid.New()
fname := fmt.Sprintf("%s%s", oid.String(), path.Ext(header.Filename))
ct := header.Header.Get("Content-Type")
originalItem, err := query.CreateOriginalItem(r.Context(), repository.CreateOriginalItemParams{
ID: oid,
Name: header.Filename,
Path: h.storage.FilePath(fname),
URL: h.storage.FileURL(h.storage.FilePath(fname)),
})
if err != nil {
tx.Rollback()
return errors.Wrap(err, "store original item to db")
}
if err := h.storage.Upload(file, originalItem.Path, storage.Public, ct); err != nil {
tx.Rollback()
return errors.Wrap(err, "upload original image")
}
if err := tx.Commit(); err != nil {
return errors.Wrap(err, "commit original item")
}
// Store resized image
tx, err = h.db.Begin()
if err != nil {
return errors.Wrap(err, "begin db transaction for resized item")
}
query = h.query.WithTx(tx)
rid := uuid.New()
rfname := fmt.Sprintf("%s%s", rid.String(), path.Ext(header.Filename))
resizedItem, err := query.CreateResizedItem(r.Context(), repository.CreateResizedItemParams{
ID: rid,
OID: oid,
Name: header.Filename,
Path: h.storage.FilePath(rfname),
URL: h.storage.FileURL(h.storage.FilePath(rfname)),
Width: int32(width),
Height: int32(height),
})
if err != nil {
tx.Rollback()
return errors.Wrap(err, "store resized item to db")
}
if _, err := file.Seek(0, 0); err != nil {
tx.Rollback()
return errors.Wrap(err, "return coursor to the begin of file")
}
resizedFile, err := h.resize(file, width, height)
if err != nil {
tx.Rollback()
return errors.Wrap(err, "resize image")
}
if err := h.storage.Upload(resizedFile, resizedItem.Path, storage.Public, ct); err != nil {
tx.Rollback()
return errors.Wrap(err, "upload resized image")
}
if err := tx.Commit(); err != nil {
return errors.Wrap(err, "commit resized item")
}
return jsonResponse(w, http.StatusOK, data{
"original": originalItem,
"resized": resizedItem,
})
}