feat: 前端搭建-未完成

internal/channel/gemini_channel.go

@@ -0,0 +1,55 @@
+package channel
+
+import (
+	"fmt"
+	"gpt-load/internal/models"
+	"net/http"
+	"net/http/httputil"
+	"net/url"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+)
+
+const GeminiBaseURL = "https://generativelanguage.googleapis.com"
+
+type GeminiChannel struct {
+	BaseURL *url.URL
+}
+
+func NewGeminiChannel(group *models.Group) (*GeminiChannel, error) {
+	baseURL, err := url.Parse(GeminiBaseURL)
+	if err != nil {
+		return nil, err // Should not happen with a constant
+	}
+	return &GeminiChannel{BaseURL: baseURL}, nil
+}
+
+func (ch *GeminiChannel) Handle(c *gin.Context, apiKey *models.APIKey, group *models.Group) {
+	proxy := httputil.NewSingleHostReverseProxy(ch.BaseURL)
+
+	proxy.Director = func(req *http.Request) {
+		// Gemini API key is passed as a query parameter
+		originalPath := c.Param("path")
+		newPath := fmt.Sprintf("%s?key=%s", originalPath, apiKey.KeyValue)
+
+		req.URL.Scheme = ch.BaseURL.Scheme
+		req.URL.Host = ch.BaseURL.Host
+		req.URL.Path = newPath
+		req.Host = ch.BaseURL.Host
+		// Remove the Authorization header if it was passed by the client
+		req.Header.Del("Authorization")
+	}
+
+	proxy.ModifyResponse = func(resp *http.Response) error {
+		// Log the response, etc.
+		return nil
+	}
+
+	proxy.ErrorHandler = func(w http.ResponseWriter, r *http.Request, err error) {
+		logrus.Errorf("Proxy error to Gemini: %v", err)
+		// Handle error, maybe update key status
+	}
+
+	proxy.ServeHTTP(c.Writer, c.Request)
+}