mirror of
https://github.com/router-for-me/CLIProxyAPI.git
synced 2026-02-02 20:40:52 +08:00
Add claude code support
This commit is contained in:
Luis Pater
555
internal/translator/claude/gemini/claude_gemini_response.go
Normal file
555
internal/translator/claude/gemini/claude_gemini_response.go
Normal file
@@ -0,0 +1,555 @@
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// Package gemini provides response translation functionality for Anthropic to Gemini API.
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// This package handles the conversion of Anthropic API responses into Gemini-compatible
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// JSON format, transforming streaming events and non-streaming responses into the format
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// expected by Gemini API clients. It supports both streaming and non-streaming modes,
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// handling text content, tool calls, and usage metadata appropriately.
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package gemini
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import (
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"strings"
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"time"
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"github.com/tidwall/gjson"
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"github.com/tidwall/sjson"
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)
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// ConvertAnthropicResponseToGeminiParams holds parameters for response conversion
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// It also carries minimal streaming state across calls to assemble tool_use input_json_delta.
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type ConvertAnthropicResponseToGeminiParams struct {
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Model string
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CreatedAt int64
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ResponseID string
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LastStorageOutput string
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IsStreaming bool
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// Streaming state for tool_use assembly
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// Keyed by content_block index from Claude SSE events
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ToolUseNames map[int]string // function/tool name per block index
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ToolUseArgs map[int]*strings.Builder // accumulates partial_json across deltas
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}
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// ConvertAnthropicResponseToGemini converts Anthropic streaming response format to Gemini format.
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// This function processes various Anthropic event types and transforms them into Gemini-compatible JSON responses.
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// It handles text content, tool calls, and usage metadata, outputting responses that match the Gemini API format.
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func ConvertAnthropicResponseToGemini(rawJSON []byte, param *ConvertAnthropicResponseToGeminiParams) []string {
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root := gjson.ParseBytes(rawJSON)
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eventType := root.Get("type").String()
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// Base Gemini response template
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template := `{"candidates":[{"content":{"role":"model","parts":[]}}],"usageMetadata":{"trafficType":"PROVISIONED_THROUGHPUT"},"modelVersion":"","createTime":"","responseId":""}`
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// Set model version
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if param.Model != "" {
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// Map Claude model names back to Gemini model names
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template, _ = sjson.Set(template, "modelVersion", param.Model)
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}
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// Set response ID and creation time
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if param.ResponseID != "" {
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template, _ = sjson.Set(template, "responseId", param.ResponseID)
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}
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// Set creation time to current time if not provided
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if param.CreatedAt == 0 {
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param.CreatedAt = time.Now().Unix()
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}
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template, _ = sjson.Set(template, "createTime", time.Unix(param.CreatedAt, 0).Format(time.RFC3339Nano))
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switch eventType {
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case "message_start":
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// Initialize response with message metadata
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if message := root.Get("message"); message.Exists() {
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param.ResponseID = message.Get("id").String()
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param.Model = message.Get("model").String()
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template, _ = sjson.Set(template, "responseId", param.ResponseID)
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template, _ = sjson.Set(template, "modelVersion", param.Model)
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}
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return []string{template}
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case "content_block_start":
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// Start of a content block - record tool_use name by index for functionCall
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if cb := root.Get("content_block"); cb.Exists() {
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if cb.Get("type").String() == "tool_use" {
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idx := int(root.Get("index").Int())
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if param.ToolUseNames == nil {
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param.ToolUseNames = map[int]string{}
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}
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if name := cb.Get("name"); name.Exists() {
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param.ToolUseNames[idx] = name.String()
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}
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}
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}
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return []string{template}
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case "content_block_delta":
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// Handle content delta (text, thinking, or tool use)
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if delta := root.Get("delta"); delta.Exists() {
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deltaType := delta.Get("type").String()
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switch deltaType {
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case "text_delta":
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// Regular text content delta
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if text := delta.Get("text"); text.Exists() && text.String() != "" {
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textPart := `{"text":""}`
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textPart, _ = sjson.Set(textPart, "text", text.String())
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template, _ = sjson.SetRaw(template, "candidates.0.content.parts.-1", textPart)
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}
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case "thinking_delta":
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// Thinking/reasoning content delta
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if text := delta.Get("text"); text.Exists() && text.String() != "" {
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thinkingPart := `{"thought":true,"text":""}`
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thinkingPart, _ = sjson.Set(thinkingPart, "text", text.String())
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template, _ = sjson.SetRaw(template, "candidates.0.content.parts.-1", thinkingPart)
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}
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case "input_json_delta":
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// Tool use input delta - accumulate partial_json by index for later assembly at content_block_stop
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idx := int(root.Get("index").Int())
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if param.ToolUseArgs == nil {
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param.ToolUseArgs = map[int]*strings.Builder{}
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}
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b, ok := param.ToolUseArgs[idx]
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if !ok || b == nil {
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bb := &strings.Builder{}
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param.ToolUseArgs[idx] = bb
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b = bb
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}
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if pj := delta.Get("partial_json"); pj.Exists() {
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b.WriteString(pj.String())
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}
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return []string{}
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}
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}
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return []string{template}
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case "content_block_stop":
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// End of content block - finalize tool calls if any
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idx := int(root.Get("index").Int())
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// Claude's content_block_stop often doesn't include content_block payload (see docs/response-claude.txt)
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// So we finalize using accumulated state captured during content_block_start and input_json_delta.
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name := ""
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if param.ToolUseNames != nil {
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name = param.ToolUseNames[idx]
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}
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var argsTrim string
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if param.ToolUseArgs != nil {
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if b := param.ToolUseArgs[idx]; b != nil {
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argsTrim = strings.TrimSpace(b.String())
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}
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}
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if name != "" || argsTrim != "" {
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functionCall := `{"functionCall":{"name":"","args":{}}}`
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if name != "" {
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functionCall, _ = sjson.Set(functionCall, "functionCall.name", name)
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}
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if argsTrim != "" {
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functionCall, _ = sjson.SetRaw(functionCall, "functionCall.args", argsTrim)
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}
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template, _ = sjson.SetRaw(template, "candidates.0.content.parts.-1", functionCall)
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template, _ = sjson.Set(template, "candidates.0.finishReason", "STOP")
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param.LastStorageOutput = template
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// cleanup used state for this index
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if param.ToolUseArgs != nil {
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delete(param.ToolUseArgs, idx)
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}
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if param.ToolUseNames != nil {
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delete(param.ToolUseNames, idx)
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}
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return []string{template}
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}
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return []string{}
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case "message_delta":
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// Handle message-level changes (like stop reason)
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if delta := root.Get("delta"); delta.Exists() {
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if stopReason := delta.Get("stop_reason"); stopReason.Exists() {
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switch stopReason.String() {
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case "end_turn":
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template, _ = sjson.Set(template, "candidates.0.finishReason", "STOP")
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case "tool_use":
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template, _ = sjson.Set(template, "candidates.0.finishReason", "STOP")
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case "max_tokens":
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template, _ = sjson.Set(template, "candidates.0.finishReason", "MAX_TOKENS")
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case "stop_sequence":
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template, _ = sjson.Set(template, "candidates.0.finishReason", "STOP")
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default:
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template, _ = sjson.Set(template, "candidates.0.finishReason", "STOP")
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}
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}
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}
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if usage := root.Get("usage"); usage.Exists() {
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// Basic token counts
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inputTokens := usage.Get("input_tokens").Int()
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outputTokens := usage.Get("output_tokens").Int()
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// Set basic usage metadata according to Gemini API specification
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template, _ = sjson.Set(template, "usageMetadata.promptTokenCount", inputTokens)
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template, _ = sjson.Set(template, "usageMetadata.candidatesTokenCount", outputTokens)
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template, _ = sjson.Set(template, "usageMetadata.totalTokenCount", inputTokens+outputTokens)
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// Add cache-related token counts if present (Anthropic API cache fields)
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if cacheCreationTokens := usage.Get("cache_creation_input_tokens"); cacheCreationTokens.Exists() {
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template, _ = sjson.Set(template, "usageMetadata.cachedContentTokenCount", cacheCreationTokens.Int())
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}
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if cacheReadTokens := usage.Get("cache_read_input_tokens"); cacheReadTokens.Exists() {
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// Add cache read tokens to cached content count
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existingCacheTokens := usage.Get("cache_creation_input_tokens").Int()
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totalCacheTokens := existingCacheTokens + cacheReadTokens.Int()
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template, _ = sjson.Set(template, "usageMetadata.cachedContentTokenCount", totalCacheTokens)
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}
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// Add thinking tokens if present (for models with reasoning capabilities)
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if thinkingTokens := usage.Get("thinking_tokens"); thinkingTokens.Exists() {
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template, _ = sjson.Set(template, "usageMetadata.thoughtsTokenCount", thinkingTokens.Int())
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}
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// Set traffic type (required by Gemini API)
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template, _ = sjson.Set(template, "usageMetadata.trafficType", "PROVISIONED_THROUGHPUT")
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}
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template, _ = sjson.Set(template, "candidates.0.finishReason", "STOP")
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return []string{template}
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case "message_stop":
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// Final message with usage information
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return []string{}
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case "error":
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// Handle error responses
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errorMsg := root.Get("error.message").String()
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if errorMsg == "" {
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errorMsg = "Unknown error occurred"
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}
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// Create error response in Gemini format
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errorResponse := `{"error":{"code":400,"message":"","status":"INVALID_ARGUMENT"}}`
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errorResponse, _ = sjson.Set(errorResponse, "error.message", errorMsg)
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return []string{errorResponse}
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default:
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// Unknown event type, return empty
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return []string{}
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}
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}
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// ConvertAnthropicResponseToGeminiNonStream converts Anthropic streaming events to a single Gemini non-streaming response.
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// This function processes multiple Anthropic streaming events and aggregates them into a complete
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// Gemini-compatible JSON response that includes all content parts (including thinking/reasoning),
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// function calls, and usage metadata. It simulates the streaming process internally but returns
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// a single consolidated response.
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func ConvertAnthropicResponseToGeminiNonStream(streamingEvents [][]byte, model string) string {
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// Base Gemini response template for non-streaming
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template := `{"candidates":[{"content":{"role":"model","parts":[]},"finishReason":"STOP"}],"usageMetadata":{"trafficType":"PROVISIONED_THROUGHPUT"},"modelVersion":"","createTime":"","responseId":""}`
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// Set model version
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template, _ = sjson.Set(template, "modelVersion", model)
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// Initialize parameters for streaming conversion
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param := &ConvertAnthropicResponseToGeminiParams{
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Model: model,
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IsStreaming: false,
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}
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// Process each streaming event and collect parts
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var allParts []interface{}
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var finalUsage map[string]interface{}
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var responseID string
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var createdAt int64
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for _, eventData := range streamingEvents {
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if len(eventData) == 0 {
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continue
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}
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root := gjson.ParseBytes(eventData)
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eventType := root.Get("type").String()
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switch eventType {
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case "message_start":
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// Extract response metadata
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if message := root.Get("message"); message.Exists() {
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responseID = message.Get("id").String()
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param.ResponseID = responseID
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param.Model = message.Get("model").String()
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// Set creation time to current time if not provided
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createdAt = time.Now().Unix()
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param.CreatedAt = createdAt
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}
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case "content_block_start":
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// Prepare for content block; record tool_use name by index for later functionCall assembly
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idx := int(root.Get("index").Int())
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if cb := root.Get("content_block"); cb.Exists() {
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if cb.Get("type").String() == "tool_use" {
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if param.ToolUseNames == nil {
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param.ToolUseNames = map[int]string{}
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}
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if name := cb.Get("name"); name.Exists() {
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param.ToolUseNames[idx] = name.String()
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}
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}
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}
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continue
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case "content_block_delta":
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// Handle content delta (text, thinking, or tool input)
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if delta := root.Get("delta"); delta.Exists() {
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deltaType := delta.Get("type").String()
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switch deltaType {
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case "text_delta":
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if text := delta.Get("text"); text.Exists() && text.String() != "" {
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partJSON := `{"text":""}`
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partJSON, _ = sjson.Set(partJSON, "text", text.String())
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part := gjson.Parse(partJSON).Value().(map[string]interface{})
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allParts = append(allParts, part)
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}
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case "thinking_delta":
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if text := delta.Get("text"); text.Exists() && text.String() != "" {
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partJSON := `{"thought":true,"text":""}`
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partJSON, _ = sjson.Set(partJSON, "text", text.String())
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part := gjson.Parse(partJSON).Value().(map[string]interface{})
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allParts = append(allParts, part)
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}
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case "input_json_delta":
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// accumulate args partial_json for this index
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idx := int(root.Get("index").Int())
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if param.ToolUseArgs == nil {
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param.ToolUseArgs = map[int]*strings.Builder{}
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}
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if _, ok := param.ToolUseArgs[idx]; !ok || param.ToolUseArgs[idx] == nil {
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param.ToolUseArgs[idx] = &strings.Builder{}
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}
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if pj := delta.Get("partial_json"); pj.Exists() {
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param.ToolUseArgs[idx].WriteString(pj.String())
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}
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}
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}
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case "content_block_stop":
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// Handle tool use completion
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idx := int(root.Get("index").Int())
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// Claude's content_block_stop often doesn't include content_block payload (see docs/response-claude.txt)
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// So we finalize using accumulated state captured during content_block_start and input_json_delta.
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name := ""
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if param.ToolUseNames != nil {
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name = param.ToolUseNames[idx]
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}
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var argsTrim string
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if param.ToolUseArgs != nil {
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if b := param.ToolUseArgs[idx]; b != nil {
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argsTrim = strings.TrimSpace(b.String())
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}
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}
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if name != "" || argsTrim != "" {
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functionCallJSON := `{"functionCall":{"name":"","args":{}}}`
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if name != "" {
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functionCallJSON, _ = sjson.Set(functionCallJSON, "functionCall.name", name)
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}
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if argsTrim != "" {
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functionCallJSON, _ = sjson.SetRaw(functionCallJSON, "functionCall.args", argsTrim)
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}
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// Parse back to interface{} for allParts
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functionCall := gjson.Parse(functionCallJSON).Value().(map[string]interface{})
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allParts = append(allParts, functionCall)
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// cleanup used state for this index
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if param.ToolUseArgs != nil {
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delete(param.ToolUseArgs, idx)
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}
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if param.ToolUseNames != nil {
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delete(param.ToolUseNames, idx)
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}
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}
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case "message_delta":
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// Extract final usage information using sjson
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if usage := root.Get("usage"); usage.Exists() {
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usageJSON := `{}`
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// Basic token counts
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inputTokens := usage.Get("input_tokens").Int()
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outputTokens := usage.Get("output_tokens").Int()
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// Set basic usage metadata according to Gemini API specification
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usageJSON, _ = sjson.Set(usageJSON, "promptTokenCount", inputTokens)
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usageJSON, _ = sjson.Set(usageJSON, "candidatesTokenCount", outputTokens)
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usageJSON, _ = sjson.Set(usageJSON, "totalTokenCount", inputTokens+outputTokens)
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// Add cache-related token counts if present (Anthropic API cache fields)
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if cacheCreationTokens := usage.Get("cache_creation_input_tokens"); cacheCreationTokens.Exists() {
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usageJSON, _ = sjson.Set(usageJSON, "cachedContentTokenCount", cacheCreationTokens.Int())
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}
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if cacheReadTokens := usage.Get("cache_read_input_tokens"); cacheReadTokens.Exists() {
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// Add cache read tokens to cached content count
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existingCacheTokens := usage.Get("cache_creation_input_tokens").Int()
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totalCacheTokens := existingCacheTokens + cacheReadTokens.Int()
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usageJSON, _ = sjson.Set(usageJSON, "cachedContentTokenCount", totalCacheTokens)
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}
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// Add thinking tokens if present (for models with reasoning capabilities)
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if thinkingTokens := usage.Get("thinking_tokens"); thinkingTokens.Exists() {
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usageJSON, _ = sjson.Set(usageJSON, "thoughtsTokenCount", thinkingTokens.Int())
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}
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// Set traffic type (required by Gemini API)
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usageJSON, _ = sjson.Set(usageJSON, "trafficType", "PROVISIONED_THROUGHPUT")
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// Convert to map[string]interface{} using gjson
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finalUsage = gjson.Parse(usageJSON).Value().(map[string]interface{})
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}
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}
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}
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// Set response metadata
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if responseID != "" {
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template, _ = sjson.Set(template, "responseId", responseID)
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}
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if createdAt > 0 {
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template, _ = sjson.Set(template, "createTime", time.Unix(createdAt, 0).Format(time.RFC3339Nano))
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}
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// Consolidate consecutive text parts and thinking parts
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consolidatedParts := consolidateParts(allParts)
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// Set the consolidated parts array
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if len(consolidatedParts) > 0 {
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template, _ = sjson.SetRaw(template, "candidates.0.content.parts", convertToJSONString(consolidatedParts))
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}
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// Set usage metadata
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if finalUsage != nil {
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template, _ = sjson.SetRaw(template, "usageMetadata", convertToJSONString(finalUsage))
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}
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||||
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return template
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}
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// consolidateParts merges consecutive text parts and thinking parts to create a cleaner response
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func consolidateParts(parts []interface{}) []interface{} {
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if len(parts) == 0 {
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return parts
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||||
}
|
||||
|
||||
var consolidated []interface{}
|
||||
var currentTextPart strings.Builder
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||||
var currentThoughtPart strings.Builder
|
||||
var hasText, hasThought bool
|
||||
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||||
flushText := func() {
|
||||
if hasText && currentTextPart.Len() > 0 {
|
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textPartJSON := `{"text":""}`
|
||||
textPartJSON, _ = sjson.Set(textPartJSON, "text", currentTextPart.String())
|
||||
textPart := gjson.Parse(textPartJSON).Value().(map[string]interface{})
|
||||
consolidated = append(consolidated, textPart)
|
||||
currentTextPart.Reset()
|
||||
hasText = false
|
||||
}
|
||||
}
|
||||
|
||||
flushThought := func() {
|
||||
if hasThought && currentThoughtPart.Len() > 0 {
|
||||
thoughtPartJSON := `{"thought":true,"text":""}`
|
||||
thoughtPartJSON, _ = sjson.Set(thoughtPartJSON, "text", currentThoughtPart.String())
|
||||
thoughtPart := gjson.Parse(thoughtPartJSON).Value().(map[string]interface{})
|
||||
consolidated = append(consolidated, thoughtPart)
|
||||
currentThoughtPart.Reset()
|
||||
hasThought = false
|
||||
}
|
||||
}
|
||||
|
||||
for _, part := range parts {
|
||||
partMap, ok := part.(map[string]interface{})
|
||||
if !ok {
|
||||
// Flush any pending parts and add this non-text part
|
||||
flushText()
|
||||
flushThought()
|
||||
consolidated = append(consolidated, part)
|
||||
continue
|
||||
}
|
||||
|
||||
if thought, isThought := partMap["thought"]; isThought && thought == true {
|
||||
// This is a thinking part
|
||||
flushText() // Flush any pending text first
|
||||
|
||||
if text, hasTextContent := partMap["text"].(string); hasTextContent {
|
||||
currentThoughtPart.WriteString(text)
|
||||
hasThought = true
|
||||
}
|
||||
} else if text, hasTextContent := partMap["text"].(string); hasTextContent {
|
||||
// This is a regular text part
|
||||
flushThought() // Flush any pending thought first
|
||||
|
||||
currentTextPart.WriteString(text)
|
||||
hasText = true
|
||||
} else {
|
||||
// This is some other type of part (like function call)
|
||||
flushText()
|
||||
flushThought()
|
||||
consolidated = append(consolidated, part)
|
||||
}
|
||||
}
|
||||
|
||||
// Flush any remaining parts
|
||||
flushThought() // Flush thought first to maintain order
|
||||
flushText()
|
||||
|
||||
return consolidated
|
||||
}
|
||||
|
||||
// convertToJSONString converts interface{} to JSON string using sjson/gjson
|
||||
func convertToJSONString(v interface{}) string {
|
||||
switch val := v.(type) {
|
||||
case []interface{}:
|
||||
return convertArrayToJSON(val)
|
||||
case map[string]interface{}:
|
||||
return convertMapToJSON(val)
|
||||
default:
|
||||
// For simple types, create a temporary JSON and extract the value
|
||||
temp := `{"temp":null}`
|
||||
temp, _ = sjson.Set(temp, "temp", val)
|
||||
return gjson.Get(temp, "temp").Raw
|
||||
}
|
||||
}
|
||||
|
||||
// convertArrayToJSON converts []interface{} to JSON array string
|
||||
func convertArrayToJSON(arr []interface{}) string {
|
||||
result := "[]"
|
||||
for _, item := range arr {
|
||||
switch itemData := item.(type) {
|
||||
case map[string]interface{}:
|
||||
itemJSON := convertMapToJSON(itemData)
|
||||
result, _ = sjson.SetRaw(result, "-1", itemJSON)
|
||||
case string:
|
||||
result, _ = sjson.Set(result, "-1", itemData)
|
||||
case bool:
|
||||
result, _ = sjson.Set(result, "-1", itemData)
|
||||
case float64, int, int64:
|
||||
result, _ = sjson.Set(result, "-1", itemData)
|
||||
default:
|
||||
result, _ = sjson.Set(result, "-1", itemData)
|
||||
}
|
||||
}
|
||||
return result
|
||||
}
|
||||
|
||||
// convertMapToJSON converts map[string]interface{} to JSON object string
|
||||
func convertMapToJSON(m map[string]interface{}) string {
|
||||
result := "{}"
|
||||
for key, value := range m {
|
||||
switch val := value.(type) {
|
||||
case map[string]interface{}:
|
||||
nestedJSON := convertMapToJSON(val)
|
||||
result, _ = sjson.SetRaw(result, key, nestedJSON)
|
||||
case []interface{}:
|
||||
arrayJSON := convertArrayToJSON(val)
|
||||
result, _ = sjson.SetRaw(result, key, arrayJSON)
|
||||
case string:
|
||||
result, _ = sjson.Set(result, key, val)
|
||||
case bool:
|
||||
result, _ = sjson.Set(result, key, val)
|
||||
case float64, int, int64:
|
||||
result, _ = sjson.Set(result, key, val)
|
||||
default:
|
||||
result, _ = sjson.Set(result, key, val)
|
||||
}
|
||||
}
|
||||
return result
|
||||
}
|
||||
Reference in New Issue
Block a user