62 lines
1.5 KiB
Go
62 lines
1.5 KiB
Go
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package lib
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import (
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"bytes"
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"image"
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"image/png"
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"io"
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"net/http"
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"strconv"
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"github.com/anthonynsimon/bild/transform"
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"github.com/labstack/echo/v4"
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)
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func ResizeImg(c echo.Context) error {
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// Extract file from request
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file, _, err := c.Request().FormFile("image")
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if err != nil {
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return c.String(http.StatusBadRequest, "Error getting image file")
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}
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defer file.Close()
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// Read file content
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fileContent, err := io.ReadAll(file)
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if err != nil {
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return c.String(http.StatusBadRequest, "Error reading image file")
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}
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// Decode image
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img, _, err := image.Decode(bytes.NewReader(fileContent))
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if err != nil {
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return c.String(http.StatusBadRequest, "Error decoding image")
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}
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// Get dimensions from form data parameters
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widthStr := c.FormValue("width")
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heightStr := c.FormValue("height")
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// Validate and convert dimensions to integers
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width, err := strconv.Atoi(widthStr)
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if err != nil {
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return c.String(http.StatusBadRequest, "Invalid width parameter")
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}
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height, err := strconv.Atoi(heightStr)
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if err != nil {
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return c.String(http.StatusBadRequest, "Invalid height parameter")
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}
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// Resize the image
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resizedImg := transform.Resize(img, width, height, transform.Linear)
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// Encode the resized image as PNG
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buf := new(bytes.Buffer)
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if err := png.Encode(buf, resizedImg); err != nil {
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return c.String(http.StatusInternalServerError, "Error encoding image to PNG")
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}
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// Return the resized image as response
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return c.Blob(http.StatusOK, "image/png", buf.Bytes())
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}
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