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feat: add image resize handler (#72)
* feat: add image resize handler --------- Co-authored-by: robert <juroberrttyb@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| package handlers | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net/http" | ||
| "path/filepath" | ||
| "strings" | ||
|
|
||
| "github.com/anthonynsimon/bild/imgio" | ||
| "github.com/anthonynsimon/bild/transform" | ||
| "github.com/gin-gonic/gin" | ||
| "github.com/kevinanielsen/go-fast-cdn/util" | ||
| ) | ||
|
|
||
| // TODO: add logging package | ||
| func HandleImageResize(c *gin.Context) { | ||
| body := struct { | ||
| Filename string `json:"filename" binding:"required"` | ||
| Width int `json:"width" binding:"required"` | ||
| Height int `json:"height" binding:"required"` | ||
| }{} | ||
| if e := c.BindJSON(&body); e != nil { | ||
| // TODO: add shared error handling accross handler package | ||
| c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{ | ||
| "error": e.Error(), | ||
| }) | ||
| return | ||
| } | ||
|
|
||
| filename, err := util.FilterFilename(body.Filename) | ||
| if err != nil { | ||
| c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{ | ||
| "error": err.Error(), | ||
| }) | ||
| return | ||
| } | ||
| imgType := strings.Split(filename, ".")[1] | ||
|
|
||
| filepath := filepath.Join(util.ExPath, "uploads", "images", filename) | ||
|
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||
| img, err := imgio.Open(filepath) | ||
| if err != nil { | ||
| c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{ | ||
| "error": err.Error(), | ||
| }) | ||
| return | ||
| } | ||
| img = transform.Resize(img, body.Width, body.Height, transform.Linear) | ||
|
|
||
| // TODO: a shared accepted image type data could be added to be shared between upload and resize api | ||
| var encoder imgio.Encoder | ||
| switch imgType { | ||
| case "png": | ||
| encoder = imgio.PNGEncoder() | ||
| case "jpg", "jpeg": | ||
| // 75 is the default quality encoding parameter | ||
| encoder = imgio.JPEGEncoder(75) | ||
| case "bmp": | ||
| encoder = imgio.BMPEncoder() | ||
| default: | ||
| c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{ | ||
| "error": fmt.Sprintf("Image of type %s is not supported", imgType), | ||
| }) | ||
| return | ||
| } | ||
|
|
||
| if err := imgio.Save(filepath, img, encoder); err != nil { | ||
| c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{ | ||
| "error": err.Error(), | ||
| }) | ||
| return | ||
| } | ||
|
|
||
| c.JSON(http.StatusOK, gin.H{ | ||
| "status": "File resized successfully", | ||
| }) | ||
| } |
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