feat: support claude and gemini in vertex ai (#1621)

* feat: support claude and gemini in vertex ai

* fix: do not show api key field in channel page when the type is VertexAI

* fix: update getToken function to include channelId in cache key

relay/adaptor/vertexai/adaptor.go

@@ -0,0 +1,101 @@
+package vertexai
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/songquanpeng/one-api/relay/adaptor"
+	channelhelper "github.com/songquanpeng/one-api/relay/adaptor"
+	"github.com/songquanpeng/one-api/relay/meta"
+	"github.com/songquanpeng/one-api/relay/model"
+	relaymodel "github.com/songquanpeng/one-api/relay/model"
+)
+
+var _ adaptor.Adaptor = new(Adaptor)
+
+const channelName = "vertexai"
+
+type Adaptor struct {}
+
+func (a *Adaptor) Init(meta *meta.Meta) {
+}
+
+func (a *Adaptor) ConvertRequest(c *gin.Context, relayMode int, request *model.GeneralOpenAIRequest) (any, error) {
+	if request == nil {
+		return nil, errors.New("request is nil")
+	}
+
+	adaptor := GetAdaptor(request.Model)
+	if adaptor == nil {
+		return nil, errors.New("adaptor not found")
+	}
+
+	return adaptor.ConvertRequest(c, relayMode, request)
+}
+
+func (a *Adaptor) DoResponse(c *gin.Context, resp *http.Response, meta *meta.Meta) (usage *model.Usage, err *model.ErrorWithStatusCode) {
+	adaptor := GetAdaptor(meta.OriginModelName)
+	if adaptor == nil {
+		return nil, &relaymodel.ErrorWithStatusCode{
+			StatusCode: http.StatusInternalServerError,
+			Error: relaymodel.Error{
+				Message: "adaptor not found",
+			},
+		}
+	}
+	return adaptor.DoResponse(c, resp, meta)
+}
+
+func (a *Adaptor) GetModelList() (models []string) {
+	models = modelList
+	return
+}
+
+func (a *Adaptor) GetChannelName() string {
+	return channelName
+}
+
+func (a *Adaptor) GetRequestURL(meta *meta.Meta) (string, error) {
+	suffix := ""
+	if strings.HasPrefix(meta.ActualModelName, "gemini") {
+		if meta.IsStream {
+			suffix = "streamGenerateContent"
+		} else {
+			suffix = "generateContent"
+		}
+	} else {
+		if meta.IsStream {
+			suffix = "streamRawPredict"
+		} else {
+			suffix = "rawPredict"
+		}
+	}
+
+	baseUrl := fmt.Sprintf("https://%s-aiplatform.googleapis.com/v1/projects/%s/locations/%s/publishers/google/models/%s:%s", meta.Config.Region, meta.Config.VertexAIProjectID, meta.Config.Region, meta.ActualModelName, suffix)
+	return baseUrl, nil
+}
+
+func (a *Adaptor) SetupRequestHeader(c *gin.Context, req *http.Request, meta *meta.Meta) error {
+	adaptor.SetupCommonRequestHeader(c, req, meta)
+	token, err := getToken(c, meta.ChannelId, meta.Config.VertexAIADC)
+	if err != nil {
+		return err
+	}
+	req.Header.Set("Authorization", "Bearer "+token)
+	return nil
+}
+
+func (a *Adaptor) ConvertImageRequest(request *model.ImageRequest) (any, error) {
+	if request == nil {
+		return nil, errors.New("request is nil")
+	}
+	return request, nil
+}
+
+func (a *Adaptor) DoRequest(c *gin.Context, meta *meta.Meta, requestBody io.Reader) (*http.Response, error) {
+	return channelhelper.DoRequestHelper(a, c, meta, requestBody)
+}