Files
CLIProxyAPI/internal/api/modules/amp/gemini_bridge.go
Ben Vargas 7ae00320dc fix(amp): enable OAuth fallback for Gemini v1beta1 routes
AMP CLI sends Gemini requests to non-standard paths that were being
directly proxied to ampcode.com without checking for local OAuth.

This fix adds:
- GeminiBridge handler to transform AMP CLI paths to standard format
- Enhanced model extraction from AMP's /publishers/google/models/* paths
- FallbackHandler wrapper to check for local OAuth before proxying

Flow:
- If user has local Google OAuth → use it (free tier)
- If no local OAuth → fallback to ampcode.com (charges credits)

Fixes issue where gemini-3-pro-preview requests always charged AMP
credits even when user had valid Google Cloud OAuth configured.
2025-11-19 18:23:17 -07:00

46 lines
1.4 KiB
Go

package amp
import (
"strings"
"github.com/gin-gonic/gin"
"github.com/router-for-me/CLIProxyAPI/v6/sdk/api/handlers/gemini"
)
// createGeminiBridgeHandler creates a handler that bridges AMP CLI's non-standard Gemini paths
// to our standard Gemini handler by rewriting the request context.
//
// AMP CLI format: /publishers/google/models/gemini-3-pro-preview:streamGenerateContent
// Standard format: /models/gemini-3-pro-preview:streamGenerateContent
//
// This extracts the model+method from the AMP path and sets it as the :action parameter
// so the standard Gemini handler can process it.
func createGeminiBridgeHandler(geminiHandler *gemini.GeminiAPIHandler) gin.HandlerFunc {
return func(c *gin.Context) {
// Get the full path from the catch-all parameter
path := c.Param("path")
// Extract model:method from AMP CLI path format
// Example: /publishers/google/models/gemini-3-pro-preview:streamGenerateContent
if idx := strings.Index(path, "/models/"); idx >= 0 {
// Extract everything after "/models/"
actionPart := path[idx+8:] // Skip "/models/"
// Set this as the :action parameter that the Gemini handler expects
c.Params = append(c.Params, gin.Param{
Key: "action",
Value: actionPart,
})
// Call the standard Gemini handler
geminiHandler.GeminiHandler(c)
return
}
// If we can't parse the path, return 400
c.JSON(400, gin.H{
"error": "Invalid Gemini API path format",
})
}
}