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upscale_esrgan.go
71 lines (58 loc) · 1.81 KB
/
upscale_esrgan.go
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package stabilityai
import (
"bytes"
"context"
"fmt"
"io"
"mime/multipart"
"net/http"
)
type UpscaleESRGANRequest struct {
Image io.Reader
Width int
Height int
}
func (c *Client) UpscaleESRGAN(ctx context.Context, req UpscaleESRGANRequest, out io.Writer) error {
buff := bytes.Buffer{}
form := multipart.NewWriter(&buff)
img, err := form.CreateFormField("image")
if err != nil {
return fmt.Errorf("failed to create form field image: %w", err)
}
if _, err := io.Copy(img, req.Image); err != nil {
return fmt.Errorf("failed to copy image to form field: %w", err)
}
if req.Width > 0 {
if err := form.WriteField("width", fmt.Sprintf("%d", req.Width)); err != nil {
return fmt.Errorf("failed to write field width: %w", err)
}
}
if req.Height > 0 {
if err := form.WriteField("height", fmt.Sprintf("%d", req.Height)); err != nil {
return fmt.Errorf("failed to write field height: %w", err)
}
}
if err := form.Close(); err != nil {
return fmt.Errorf("failed to close multipart writer: %w", err)
}
url := "https://api.stability.ai/v1/generation/esrgan-v1-x2plus/image-to-image/upscale"
rq, err := http.NewRequestWithContext(ctx, http.MethodPost, url, &buff)
if err != nil {
return fmt.Errorf("failed to create request %s: %w", url, err)
}
rq.Header.Set("Authorization", fmt.Sprintf("Bearer %s", c.apiKey))
rq.Header.Set("Content-Type", form.FormDataContentType())
rq.Header.Set("Accept", "image/png")
resp, err := c.httpClient.Do(rq)
if err != nil {
return fmt.Errorf("failed to send request %s: %w", url, err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("unexpected status code %s: %d", url, resp.StatusCode)
}
if _, err := io.Copy(out, resp.Body); err != nil {
return fmt.Errorf("failed to copy response body %s: %w", url, err)
}
return nil
}