mirror of
https://github.com/router-for-me/CLIProxyAPI.git
synced 2026-02-03 13:00:52 +08:00
716aa71f6e
Move OpenAI `reasoning_effort` -> Gemini `thinkingConfig` budget logic into shared helpers used by Gemini, Gemini CLI, and antigravity translators. Normalize Claude thinking handling by preferring positive budgets, applying budget token normalization, and gating by model support. Always convert Gemini `thinkingBudget` back to OpenAI `reasoning_effort` to support allowCompat models, and update tests for normalization behavior.
341 lines
13 KiB
Go
341 lines
13 KiB
Go
// Package gemini provides request translation functionality for Gemini to Claude Code API compatibility.
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// It handles parsing and transforming Gemini API requests into Claude Code API format,
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// extracting model information, system instructions, message contents, and tool declarations.
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// The package performs JSON data transformation to ensure compatibility
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// between Gemini API format and Claude Code API's expected format.
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package gemini
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import (
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"bytes"
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"crypto/rand"
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"crypto/sha256"
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"encoding/hex"
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"fmt"
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"math/big"
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"strings"
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"github.com/google/uuid"
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"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
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"github.com/tidwall/gjson"
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"github.com/tidwall/sjson"
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)
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var (
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user = ""
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account = ""
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session = ""
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)
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// ConvertGeminiRequestToClaude parses and transforms a Gemini API request into Claude Code API format.
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// It extracts the model name, system instruction, message contents, and tool declarations
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// from the raw JSON request and returns them in the format expected by the Claude Code API.
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// The function performs comprehensive transformation including:
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// 1. Model name mapping and generation configuration extraction
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// 2. System instruction conversion to Claude Code format
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// 3. Message content conversion with proper role mapping
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// 4. Tool call and tool result handling with FIFO queue for ID matching
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// 5. Image and file data conversion to Claude Code base64 format
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// 6. Tool declaration and tool choice configuration mapping
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//
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// Parameters:
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// - modelName: The name of the model to use for the request
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// - rawJSON: The raw JSON request data from the Gemini API
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// - stream: A boolean indicating if the request is for a streaming response
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//
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// Returns:
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// - []byte: The transformed request data in Claude Code API format
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func ConvertGeminiRequestToClaude(modelName string, inputRawJSON []byte, stream bool) []byte {
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rawJSON := bytes.Clone(inputRawJSON)
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if account == "" {
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u, _ := uuid.NewRandom()
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account = u.String()
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}
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if session == "" {
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u, _ := uuid.NewRandom()
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session = u.String()
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}
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if user == "" {
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sum := sha256.Sum256([]byte(account + session))
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user = hex.EncodeToString(sum[:])
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}
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userID := fmt.Sprintf("user_%s_account_%s_session_%s", user, account, session)
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// Base Claude message payload
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out := fmt.Sprintf(`{"model":"","max_tokens":32000,"messages":[],"metadata":{"user_id":"%s"}}`, userID)
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root := gjson.ParseBytes(rawJSON)
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// Helper for generating tool call IDs in the form: toolu_<alphanum>
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// This ensures unique identifiers for tool calls in the Claude Code format
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genToolCallID := func() string {
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const letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
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var b strings.Builder
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// 24 chars random suffix for uniqueness
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for i := 0; i < 24; i++ {
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n, _ := rand.Int(rand.Reader, big.NewInt(int64(len(letters))))
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b.WriteByte(letters[n.Int64()])
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}
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return "toolu_" + b.String()
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}
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// FIFO queue to store tool call IDs for matching with tool results
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// Gemini uses sequential pairing across possibly multiple in-flight
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// functionCalls, so we keep a FIFO queue of generated tool IDs and
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// consume them in order when functionResponses arrive.
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var pendingToolIDs []string
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// Model mapping to specify which Claude Code model to use
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out, _ = sjson.Set(out, "model", modelName)
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// Generation config extraction from Gemini format
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if genConfig := root.Get("generationConfig"); genConfig.Exists() {
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// Max output tokens configuration
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if maxTokens := genConfig.Get("maxOutputTokens"); maxTokens.Exists() {
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out, _ = sjson.Set(out, "max_tokens", maxTokens.Int())
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}
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// Temperature setting for controlling response randomness
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if temp := genConfig.Get("temperature"); temp.Exists() {
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out, _ = sjson.Set(out, "temperature", temp.Float())
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}
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// Top P setting for nucleus sampling
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if topP := genConfig.Get("topP"); topP.Exists() {
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out, _ = sjson.Set(out, "top_p", topP.Float())
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}
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// Stop sequences configuration for custom termination conditions
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if stopSeqs := genConfig.Get("stopSequences"); stopSeqs.Exists() && stopSeqs.IsArray() {
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var stopSequences []string
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stopSeqs.ForEach(func(_, value gjson.Result) bool {
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stopSequences = append(stopSequences, value.String())
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return true
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})
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if len(stopSequences) > 0 {
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out, _ = sjson.Set(out, "stop_sequences", stopSequences)
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}
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}
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// Include thoughts configuration for reasoning process visibility
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// Only apply for models that support thinking and use numeric budgets, not discrete levels.
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if thinkingConfig := genConfig.Get("thinkingConfig"); thinkingConfig.Exists() && thinkingConfig.IsObject() && util.ModelSupportsThinking(modelName) && !util.ModelUsesThinkingLevels(modelName) {
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// Check for thinkingBudget first - if present, enable thinking with budget
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if thinkingBudget := thinkingConfig.Get("thinkingBudget"); thinkingBudget.Exists() && thinkingBudget.Int() > 0 {
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out, _ = sjson.Set(out, "thinking.type", "enabled")
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normalizedBudget := util.NormalizeThinkingBudget(modelName, int(thinkingBudget.Int()))
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out, _ = sjson.Set(out, "thinking.budget_tokens", normalizedBudget)
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} else if includeThoughts := thinkingConfig.Get("include_thoughts"); includeThoughts.Exists() && includeThoughts.Type == gjson.True {
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// Fallback to include_thoughts if no budget specified
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out, _ = sjson.Set(out, "thinking.type", "enabled")
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}
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}
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}
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// System instruction conversion to Claude Code format
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if sysInstr := root.Get("system_instruction"); sysInstr.Exists() {
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if parts := sysInstr.Get("parts"); parts.Exists() && parts.IsArray() {
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var systemText strings.Builder
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parts.ForEach(func(_, part gjson.Result) bool {
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if text := part.Get("text"); text.Exists() {
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if systemText.Len() > 0 {
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systemText.WriteString("\n")
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}
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systemText.WriteString(text.String())
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}
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return true
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})
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if systemText.Len() > 0 {
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// Create system message in Claude Code format
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systemMessage := `{"role":"user","content":[{"type":"text","text":""}]}`
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systemMessage, _ = sjson.Set(systemMessage, "content.0.text", systemText.String())
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out, _ = sjson.SetRaw(out, "messages.-1", systemMessage)
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}
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}
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}
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// Contents conversion to messages with proper role mapping
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if contents := root.Get("contents"); contents.Exists() && contents.IsArray() {
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contents.ForEach(func(_, content gjson.Result) bool {
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role := content.Get("role").String()
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// Map Gemini roles to Claude Code roles
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if role == "model" {
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role = "assistant"
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}
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if role == "function" {
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role = "user"
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}
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if role == "tool" {
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role = "user"
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}
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// Create message structure in Claude Code format
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msg := `{"role":"","content":[]}`
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msg, _ = sjson.Set(msg, "role", role)
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if parts := content.Get("parts"); parts.Exists() && parts.IsArray() {
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parts.ForEach(func(_, part gjson.Result) bool {
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// Text content conversion
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if text := part.Get("text"); text.Exists() {
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textContent := `{"type":"text","text":""}`
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textContent, _ = sjson.Set(textContent, "text", text.String())
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msg, _ = sjson.SetRaw(msg, "content.-1", textContent)
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return true
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}
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// Function call (from model/assistant) conversion to tool use
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if fc := part.Get("functionCall"); fc.Exists() && role == "assistant" {
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toolUse := `{"type":"tool_use","id":"","name":"","input":{}}`
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// Generate a unique tool ID and enqueue it for later matching
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// with the corresponding functionResponse
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toolID := genToolCallID()
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pendingToolIDs = append(pendingToolIDs, toolID)
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toolUse, _ = sjson.Set(toolUse, "id", toolID)
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if name := fc.Get("name"); name.Exists() {
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toolUse, _ = sjson.Set(toolUse, "name", name.String())
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}
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if args := fc.Get("args"); args.Exists() {
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toolUse, _ = sjson.SetRaw(toolUse, "input", args.Raw)
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}
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msg, _ = sjson.SetRaw(msg, "content.-1", toolUse)
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return true
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}
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// Function response (from user) conversion to tool result
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if fr := part.Get("functionResponse"); fr.Exists() {
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toolResult := `{"type":"tool_result","tool_use_id":"","content":""}`
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// Attach the oldest queued tool_id to pair the response
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// with its call. If the queue is empty, generate a new id.
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var toolID string
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if len(pendingToolIDs) > 0 {
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toolID = pendingToolIDs[0]
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// Pop the first element from the queue
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pendingToolIDs = pendingToolIDs[1:]
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} else {
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// Fallback: generate new ID if no pending tool_use found
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toolID = genToolCallID()
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}
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toolResult, _ = sjson.Set(toolResult, "tool_use_id", toolID)
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// Extract result content from the function response
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if result := fr.Get("response.result"); result.Exists() {
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toolResult, _ = sjson.Set(toolResult, "content", result.String())
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} else if response := fr.Get("response"); response.Exists() {
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toolResult, _ = sjson.Set(toolResult, "content", response.Raw)
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}
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msg, _ = sjson.SetRaw(msg, "content.-1", toolResult)
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return true
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}
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// Image content (inline_data) conversion to Claude Code format
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if inlineData := part.Get("inline_data"); inlineData.Exists() {
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imageContent := `{"type":"image","source":{"type":"base64","media_type":"","data":""}}`
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if mimeType := inlineData.Get("mime_type"); mimeType.Exists() {
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imageContent, _ = sjson.Set(imageContent, "source.media_type", mimeType.String())
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}
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if data := inlineData.Get("data"); data.Exists() {
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imageContent, _ = sjson.Set(imageContent, "source.data", data.String())
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}
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msg, _ = sjson.SetRaw(msg, "content.-1", imageContent)
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return true
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}
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// File data conversion to text content with file info
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if fileData := part.Get("file_data"); fileData.Exists() {
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// For file data, we'll convert to text content with file info
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textContent := `{"type":"text","text":""}`
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fileInfo := "File: " + fileData.Get("file_uri").String()
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if mimeType := fileData.Get("mime_type"); mimeType.Exists() {
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fileInfo += " (Type: " + mimeType.String() + ")"
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}
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textContent, _ = sjson.Set(textContent, "text", fileInfo)
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msg, _ = sjson.SetRaw(msg, "content.-1", textContent)
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return true
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}
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return true
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})
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}
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// Only add message if it has content
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if contentArray := gjson.Get(msg, "content"); contentArray.Exists() && len(contentArray.Array()) > 0 {
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out, _ = sjson.SetRaw(out, "messages.-1", msg)
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}
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return true
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})
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}
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// Tools mapping: Gemini functionDeclarations -> Claude Code tools
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if tools := root.Get("tools"); tools.Exists() && tools.IsArray() {
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var anthropicTools []interface{}
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tools.ForEach(func(_, tool gjson.Result) bool {
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if funcDecls := tool.Get("functionDeclarations"); funcDecls.Exists() && funcDecls.IsArray() {
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funcDecls.ForEach(func(_, funcDecl gjson.Result) bool {
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anthropicTool := `{"name":"","description":"","input_schema":{}}`
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if name := funcDecl.Get("name"); name.Exists() {
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anthropicTool, _ = sjson.Set(anthropicTool, "name", name.String())
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}
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if desc := funcDecl.Get("description"); desc.Exists() {
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anthropicTool, _ = sjson.Set(anthropicTool, "description", desc.String())
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}
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if params := funcDecl.Get("parameters"); params.Exists() {
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// Clean up the parameters schema for Claude Code compatibility
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cleaned := params.Raw
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cleaned, _ = sjson.Set(cleaned, "additionalProperties", false)
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cleaned, _ = sjson.Set(cleaned, "$schema", "http://json-schema.org/draft-07/schema#")
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anthropicTool, _ = sjson.SetRaw(anthropicTool, "input_schema", cleaned)
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} else if params = funcDecl.Get("parametersJsonSchema"); params.Exists() {
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// Clean up the parameters schema for Claude Code compatibility
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cleaned := params.Raw
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cleaned, _ = sjson.Set(cleaned, "additionalProperties", false)
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cleaned, _ = sjson.Set(cleaned, "$schema", "http://json-schema.org/draft-07/schema#")
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anthropicTool, _ = sjson.SetRaw(anthropicTool, "input_schema", cleaned)
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}
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anthropicTools = append(anthropicTools, gjson.Parse(anthropicTool).Value())
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return true
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})
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}
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return true
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})
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if len(anthropicTools) > 0 {
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out, _ = sjson.Set(out, "tools", anthropicTools)
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}
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}
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// Tool config mapping from Gemini format to Claude Code format
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if toolConfig := root.Get("tool_config"); toolConfig.Exists() {
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if funcCalling := toolConfig.Get("function_calling_config"); funcCalling.Exists() {
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if mode := funcCalling.Get("mode"); mode.Exists() {
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switch mode.String() {
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case "AUTO":
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out, _ = sjson.Set(out, "tool_choice", map[string]interface{}{"type": "auto"})
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case "NONE":
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out, _ = sjson.Set(out, "tool_choice", map[string]interface{}{"type": "none"})
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case "ANY":
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out, _ = sjson.Set(out, "tool_choice", map[string]interface{}{"type": "any"})
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}
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}
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}
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}
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// Stream setting configuration
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out, _ = sjson.Set(out, "stream", stream)
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// Convert tool parameter types to lowercase for Claude Code compatibility
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var pathsToLower []string
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toolsResult := gjson.Get(out, "tools")
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util.Walk(toolsResult, "", "type", &pathsToLower)
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for _, p := range pathsToLower {
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fullPath := fmt.Sprintf("tools.%s", p)
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out, _ = sjson.Set(out, fullPath, strings.ToLower(gjson.Get(out, fullPath).String()))
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}
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return []byte(out)
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}
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