feat: support replicate chat models (#1989)

* feat: add Replicate adaptor and integrate into channel and API types

* feat: support llm chat on replicate

relay/adaptor/replicate/image.go

@@ -0,0 +1,222 @@
+package replicate
+
+import (
+	"bytes"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"image"
+	"image/png"
+	"io"
+	"net/http"
+	"sync"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/pkg/errors"
+	"github.com/songquanpeng/one-api/common/logger"
+	"github.com/songquanpeng/one-api/relay/adaptor/openai"
+	"github.com/songquanpeng/one-api/relay/meta"
+	"github.com/songquanpeng/one-api/relay/model"
+	"golang.org/x/image/webp"
+	"golang.org/x/sync/errgroup"
+)
+
+// ImagesEditsHandler just copy response body to client
+//
+// https://replicate.com/black-forest-labs/flux-fill-pro
+// func ImagesEditsHandler(c *gin.Context, resp *http.Response) (*model.ErrorWithStatusCode, *model.Usage) {
+// 	c.Writer.WriteHeader(resp.StatusCode)
+// 	for k, v := range resp.Header {
+// 		c.Writer.Header().Set(k, v[0])
+// 	}
+
+// 	if _, err := io.Copy(c.Writer, resp.Body); err != nil {
+// 		return ErrorWrapper(err, "copy_response_body_failed", http.StatusInternalServerError), nil
+// 	}
+// 	defer resp.Body.Close()
+
+// 	return nil, nil
+// }
+
+var errNextLoop = errors.New("next_loop")
+
+func ImageHandler(c *gin.Context, resp *http.Response) (*model.ErrorWithStatusCode, *model.Usage) {
+	if resp.StatusCode != http.StatusCreated {
+		payload, _ := io.ReadAll(resp.Body)
+		return openai.ErrorWrapper(
+				errors.Errorf("bad_status_code [%d]%s", resp.StatusCode, string(payload)),
+				"bad_status_code", http.StatusInternalServerError),
+			nil
+	}
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return openai.ErrorWrapper(err, "read_response_body_failed", http.StatusInternalServerError), nil
+	}
+
+	respData := new(ImageResponse)
+	if err = json.Unmarshal(respBody, respData); err != nil {
+		return openai.ErrorWrapper(err, "unmarshal_response_body_failed", http.StatusInternalServerError), nil
+	}
+
+	for {
+		err = func() error {
+			// get task
+			taskReq, err := http.NewRequestWithContext(c.Request.Context(),
+				http.MethodGet, respData.URLs.Get, nil)
+			if err != nil {
+				return errors.Wrap(err, "new request")
+			}
+
+			taskReq.Header.Set("Authorization", "Bearer "+meta.GetByContext(c).APIKey)
+			taskResp, err := http.DefaultClient.Do(taskReq)
+			if err != nil {
+				return errors.Wrap(err, "get task")
+			}
+			defer taskResp.Body.Close()
+
+			if taskResp.StatusCode != http.StatusOK {
+				payload, _ := io.ReadAll(taskResp.Body)
+				return errors.Errorf("bad status code [%d]%s",
+					taskResp.StatusCode, string(payload))
+			}
+
+			taskBody, err := io.ReadAll(taskResp.Body)
+			if err != nil {
+				return errors.Wrap(err, "read task response")
+			}
+
+			taskData := new(ImageResponse)
+			if err = json.Unmarshal(taskBody, taskData); err != nil {
+				return errors.Wrap(err, "decode task response")
+			}
+
+			switch taskData.Status {
+			case "succeeded":
+			case "failed", "canceled":
+				return errors.Errorf("task failed: %s", taskData.Status)
+			default:
+				time.Sleep(time.Second * 3)
+				return errNextLoop
+			}
+
+			output, err := taskData.GetOutput()
+			if err != nil {
+				return errors.Wrap(err, "get output")
+			}
+			if len(output) == 0 {
+				return errors.New("response output is empty")
+			}
+
+			var mu sync.Mutex
+			var pool errgroup.Group
+			respBody := &openai.ImageResponse{
+				Created: taskData.CompletedAt.Unix(),
+				Data:    []openai.ImageData{},
+			}
+
+			for _, imgOut := range output {
+				imgOut := imgOut
+				pool.Go(func() error {
+					// download image
+					downloadReq, err := http.NewRequestWithContext(c.Request.Context(),
+						http.MethodGet, imgOut, nil)
+					if err != nil {
+						return errors.Wrap(err, "new request")
+					}
+
+					imgResp, err := http.DefaultClient.Do(downloadReq)
+					if err != nil {
+						return errors.Wrap(err, "download image")
+					}
+					defer imgResp.Body.Close()
+
+					if imgResp.StatusCode != http.StatusOK {
+						payload, _ := io.ReadAll(imgResp.Body)
+						return errors.Errorf("bad status code [%d]%s",
+							imgResp.StatusCode, string(payload))
+					}
+
+					imgData, err := io.ReadAll(imgResp.Body)
+					if err != nil {
+						return errors.Wrap(err, "read image")
+					}
+
+					imgData, err = ConvertImageToPNG(imgData)
+					if err != nil {
+						return errors.Wrap(err, "convert image")
+					}
+
+					mu.Lock()
+					respBody.Data = append(respBody.Data, openai.ImageData{
+						B64Json: fmt.Sprintf("data:image/png;base64,%s",
+							base64.StdEncoding.EncodeToString(imgData)),
+					})
+					mu.Unlock()
+
+					return nil
+				})
+			}
+
+			if err := pool.Wait(); err != nil {
+				if len(respBody.Data) == 0 {
+					return errors.WithStack(err)
+				}
+
+				logger.Error(c, fmt.Sprintf("some images failed to download: %+v", err))
+			}
+
+			c.JSON(http.StatusOK, respBody)
+			return nil
+		}()
+		if err != nil {
+			if errors.Is(err, errNextLoop) {
+				continue
+			}
+
+			return openai.ErrorWrapper(err, "image_task_failed", http.StatusInternalServerError), nil
+		}
+
+		break
+	}
+
+	return nil, nil
+}
+
+// ConvertImageToPNG converts a WebP image to PNG format
+func ConvertImageToPNG(webpData []byte) ([]byte, error) {
+	// bypass if it's already a PNG image
+	if bytes.HasPrefix(webpData, []byte("\x89PNG")) {
+		return webpData, nil
+	}
+
+	// check if is jpeg, convert to png
+	if bytes.HasPrefix(webpData, []byte("\xff\xd8\xff")) {
+		img, _, err := image.Decode(bytes.NewReader(webpData))
+		if err != nil {
+			return nil, errors.Wrap(err, "decode jpeg")
+		}
+
+		var pngBuffer bytes.Buffer
+		if err := png.Encode(&pngBuffer, img); err != nil {
+			return nil, errors.Wrap(err, "encode png")
+		}
+
+		return pngBuffer.Bytes(), nil
+	}
+
+	// Decode the WebP image
+	img, err := webp.Decode(bytes.NewReader(webpData))
+	if err != nil {
+		return nil, errors.Wrap(err, "decode webp")
+	}
+
+	// Encode the image as PNG
+	var pngBuffer bytes.Buffer
+	if err := png.Encode(&pngBuffer, img); err != nil {
+		return nil, errors.Wrap(err, "encode png")
+	}
+
+	return pngBuffer.Bytes(), nil
+}