Crop an Image to a Circular Area in Go

Via our Image API, dozens of image processing operations are available with just a single Cloudmersive API key for authentication. Easily crop an image into a specified circular area with pixel values as parameters using ready-to-run code in Go (included below for your convenience) or in any of 12 other programming languages available on our Cloudmersive API Console page.

package main
import (
     "fmt"
     "bytes"
     "mime/multipart"
     "os"
     "path/filepath"
     "io"
     "net/http"
     "io/ioutil"
)
func main() {
url := "https://api.cloudmersive.com/image/edit/crop/circle/%3Cinteger%3E/%3Cinteger%3E/%3Cinteger%3E"
     method := "POST"
payload := &bytes.Buffer{}
     writer := multipart.NewWriter(payload)
     file, errFile1 := os.Open("/path/to/file")
     defer file.Close()
     part1,
         errFile1 := writer.CreateFormFile("imageFile",filepath.Base("/path/to/file"))
     _, errFile1 = io.Copy(part1, file)
     if errFile1 != nil {
          fmt.Println(errFile1)
          return
     }
     err := writer.Close()
     if err != nil {
          fmt.Println(err)
          return
     }
client := &http.Client {
     }
     req, err := http.NewRequest(method, url, payload)
if err != nil {
          fmt.Println(err)
          return
     }
     req.Header.Add("Content-Type", "multipart/form-data")
     req.Header.Add("Apikey", "YOUR-API-KEY-HERE")
req.Header.Set("Content-Type", writer.FormDataContentType())
     res, err := client.Do(req)
     if err != nil {
          fmt.Println(err)
          return
     }
     defer res.Body.Close()
body, err := ioutil.ReadAll(res.Body)
     if err != nil {
          fmt.Println(err)
          return
     }
     fmt.Println(string(body))
}

New to Cloudmersive APIs? You’ll need an API key for access, so head to our website (www.cloudmersive.com) and create an account to receive your key. Among our account options, you’ll find a free-tier account is available with an 800 call-per-month limit.