mirror of
https://github.com/router-for-me/CLIProxyAPI.git
synced 2026-02-03 04:50:52 +08:00
28a428ae2f
Unify thinking budget-to-effort conversion in a shared helper, handle disabled/default thinking cases in translators, adjust zero-budget mapping, and drop the old OpenAI-specific helper with updated tests.
316 lines
11 KiB
Go
316 lines
11 KiB
Go
// Package claude provides request translation functionality for Anthropic to OpenAI API.
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// It handles parsing and transforming Anthropic API requests into OpenAI Chat Completions 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 Anthropic API format and OpenAI API's expected format.
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package claude
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import (
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"bytes"
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"encoding/json"
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"strings"
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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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// ConvertClaudeRequestToOpenAI parses and transforms an Anthropic API request into OpenAI Chat Completions 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 OpenAI API.
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func ConvertClaudeRequestToOpenAI(modelName string, inputRawJSON []byte, stream bool) []byte {
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rawJSON := bytes.Clone(inputRawJSON)
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// Base OpenAI Chat Completions API template
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out := `{"model":"","messages":[]}`
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root := gjson.ParseBytes(rawJSON)
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// Model mapping
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out, _ = sjson.Set(out, "model", modelName)
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// Max tokens
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if maxTokens := root.Get("max_tokens"); maxTokens.Exists() {
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out, _ = sjson.Set(out, "max_tokens", maxTokens.Int())
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}
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// Temperature
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if temp := root.Get("temperature"); temp.Exists() {
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out, _ = sjson.Set(out, "temperature", temp.Float())
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} else if topP := root.Get("top_p"); topP.Exists() { // Top P
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out, _ = sjson.Set(out, "top_p", topP.Float())
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}
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// Stop sequences -> stop
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if stopSequences := root.Get("stop_sequences"); stopSequences.Exists() {
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if stopSequences.IsArray() {
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var stops []string
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stopSequences.ForEach(func(_, value gjson.Result) bool {
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stops = append(stops, value.String())
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return true
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})
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if len(stops) > 0 {
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if len(stops) == 1 {
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out, _ = sjson.Set(out, "stop", stops[0])
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} else {
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out, _ = sjson.Set(out, "stop", stops)
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}
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}
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}
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}
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// Stream
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out, _ = sjson.Set(out, "stream", stream)
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// Thinking: Convert Claude thinking.budget_tokens to OpenAI reasoning_effort
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if thinking := root.Get("thinking"); thinking.Exists() && thinking.IsObject() {
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if thinkingType := thinking.Get("type"); thinkingType.Exists() {
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switch thinkingType.String() {
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case "enabled":
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if budgetTokens := thinking.Get("budget_tokens"); budgetTokens.Exists() {
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budget := int(budgetTokens.Int())
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if effort, ok := util.ThinkingBudgetToEffort(modelName, budget); ok && effort != "" {
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out, _ = sjson.Set(out, "reasoning_effort", effort)
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}
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} else {
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// No budget_tokens specified, default to "auto" for enabled thinking
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if effort, ok := util.ThinkingBudgetToEffort(modelName, -1); ok && effort != "" {
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out, _ = sjson.Set(out, "reasoning_effort", effort)
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}
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}
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case "disabled":
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if effort, ok := util.ThinkingBudgetToEffort(modelName, 0); ok && effort != "" {
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out, _ = sjson.Set(out, "reasoning_effort", effort)
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}
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}
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}
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}
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// Process messages and system
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var messagesJSON = "[]"
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// Handle system message first
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systemMsgJSON := `{"role":"system","content":[{"type":"text","text":"Use ANY tool, the parameters MUST accord with RFC 8259 (The JavaScript Object Notation (JSON) Data Interchange Format), the keys and value MUST be enclosed in double quotes."}]}`
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if system := root.Get("system"); system.Exists() {
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if system.Type == gjson.String {
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if system.String() != "" {
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oldSystem := `{"type":"text","text":""}`
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oldSystem, _ = sjson.Set(oldSystem, "text", system.String())
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systemMsgJSON, _ = sjson.SetRaw(systemMsgJSON, "content.-1", oldSystem)
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}
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} else if system.Type == gjson.JSON {
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if system.IsArray() {
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systemResults := system.Array()
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for i := 0; i < len(systemResults); i++ {
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if contentItem, ok := convertClaudeContentPart(systemResults[i]); ok {
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systemMsgJSON, _ = sjson.SetRaw(systemMsgJSON, "content.-1", contentItem)
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}
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}
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}
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}
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}
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messagesJSON, _ = sjson.SetRaw(messagesJSON, "-1", systemMsgJSON)
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// Process Anthropic messages
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if messages := root.Get("messages"); messages.Exists() && messages.IsArray() {
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messages.ForEach(func(_, message gjson.Result) bool {
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role := message.Get("role").String()
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contentResult := message.Get("content")
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// Handle content
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if contentResult.Exists() && contentResult.IsArray() {
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var contentItems []string
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var toolCalls []interface{}
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contentResult.ForEach(func(_, part gjson.Result) bool {
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partType := part.Get("type").String()
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switch partType {
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case "text", "image":
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if contentItem, ok := convertClaudeContentPart(part); ok {
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contentItems = append(contentItems, contentItem)
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}
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case "tool_use":
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// Convert to OpenAI tool call format
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toolCallJSON := `{"id":"","type":"function","function":{"name":"","arguments":""}}`
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toolCallJSON, _ = sjson.Set(toolCallJSON, "id", part.Get("id").String())
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toolCallJSON, _ = sjson.Set(toolCallJSON, "function.name", part.Get("name").String())
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// Convert input to arguments JSON string
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if input := part.Get("input"); input.Exists() {
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if inputJSON, err := json.Marshal(input.Value()); err == nil {
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toolCallJSON, _ = sjson.Set(toolCallJSON, "function.arguments", string(inputJSON))
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} else {
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toolCallJSON, _ = sjson.Set(toolCallJSON, "function.arguments", "{}")
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}
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} else {
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toolCallJSON, _ = sjson.Set(toolCallJSON, "function.arguments", "{}")
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}
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toolCalls = append(toolCalls, gjson.Parse(toolCallJSON).Value())
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case "tool_result":
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// Convert to OpenAI tool message format and add immediately to preserve order
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toolResultJSON := `{"role":"tool","tool_call_id":"","content":""}`
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toolResultJSON, _ = sjson.Set(toolResultJSON, "tool_call_id", part.Get("tool_use_id").String())
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toolResultJSON, _ = sjson.Set(toolResultJSON, "content", part.Get("content").String())
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messagesJSON, _ = sjson.Set(messagesJSON, "-1", gjson.Parse(toolResultJSON).Value())
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}
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return true
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})
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// Emit text/image content as one message
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if len(contentItems) > 0 {
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msgJSON := `{"role":"","content":""}`
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msgJSON, _ = sjson.Set(msgJSON, "role", role)
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contentArrayJSON := "[]"
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for _, contentItem := range contentItems {
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contentArrayJSON, _ = sjson.SetRaw(contentArrayJSON, "-1", contentItem)
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}
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msgJSON, _ = sjson.SetRaw(msgJSON, "content", contentArrayJSON)
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contentValue := gjson.Get(msgJSON, "content")
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hasContent := false
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switch {
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case !contentValue.Exists():
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hasContent = false
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case contentValue.Type == gjson.String:
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hasContent = contentValue.String() != ""
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case contentValue.IsArray():
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hasContent = len(contentValue.Array()) > 0
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default:
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hasContent = contentValue.Raw != "" && contentValue.Raw != "null"
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}
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if hasContent {
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messagesJSON, _ = sjson.Set(messagesJSON, "-1", gjson.Parse(msgJSON).Value())
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}
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}
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// Emit tool calls in a separate assistant message
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if role == "assistant" && len(toolCalls) > 0 {
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toolCallMsgJSON := `{"role":"assistant","tool_calls":[]}`
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toolCallsJSON, _ := json.Marshal(toolCalls)
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toolCallMsgJSON, _ = sjson.SetRaw(toolCallMsgJSON, "tool_calls", string(toolCallsJSON))
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messagesJSON, _ = sjson.Set(messagesJSON, "-1", gjson.Parse(toolCallMsgJSON).Value())
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}
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} else if contentResult.Exists() && contentResult.Type == gjson.String {
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// Simple string content
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msgJSON := `{"role":"","content":""}`
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msgJSON, _ = sjson.Set(msgJSON, "role", role)
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msgJSON, _ = sjson.Set(msgJSON, "content", contentResult.String())
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messagesJSON, _ = sjson.Set(messagesJSON, "-1", gjson.Parse(msgJSON).Value())
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}
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return true
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})
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}
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// Set messages
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if gjson.Parse(messagesJSON).IsArray() && len(gjson.Parse(messagesJSON).Array()) > 0 {
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out, _ = sjson.SetRaw(out, "messages", messagesJSON)
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}
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// Process tools - convert Anthropic tools to OpenAI functions
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if tools := root.Get("tools"); tools.Exists() && tools.IsArray() {
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var toolsJSON = "[]"
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tools.ForEach(func(_, tool gjson.Result) bool {
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openAIToolJSON := `{"type":"function","function":{"name":"","description":""}}`
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openAIToolJSON, _ = sjson.Set(openAIToolJSON, "function.name", tool.Get("name").String())
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openAIToolJSON, _ = sjson.Set(openAIToolJSON, "function.description", tool.Get("description").String())
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// Convert Anthropic input_schema to OpenAI function parameters
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if inputSchema := tool.Get("input_schema"); inputSchema.Exists() {
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openAIToolJSON, _ = sjson.Set(openAIToolJSON, "function.parameters", inputSchema.Value())
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}
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toolsJSON, _ = sjson.Set(toolsJSON, "-1", gjson.Parse(openAIToolJSON).Value())
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return true
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})
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if gjson.Parse(toolsJSON).IsArray() && len(gjson.Parse(toolsJSON).Array()) > 0 {
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out, _ = sjson.SetRaw(out, "tools", toolsJSON)
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}
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}
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// Tool choice mapping - convert Anthropic tool_choice to OpenAI format
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if toolChoice := root.Get("tool_choice"); toolChoice.Exists() {
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switch toolChoice.Get("type").String() {
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case "auto":
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out, _ = sjson.Set(out, "tool_choice", "auto")
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case "any":
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out, _ = sjson.Set(out, "tool_choice", "required")
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case "tool":
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// Specific tool choice
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toolName := toolChoice.Get("name").String()
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toolChoiceJSON := `{"type":"function","function":{"name":""}}`
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toolChoiceJSON, _ = sjson.Set(toolChoiceJSON, "function.name", toolName)
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out, _ = sjson.SetRaw(out, "tool_choice", toolChoiceJSON)
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default:
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// Default to auto if not specified
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out, _ = sjson.Set(out, "tool_choice", "auto")
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}
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}
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// Handle user parameter (for tracking)
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if user := root.Get("user"); user.Exists() {
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out, _ = sjson.Set(out, "user", user.String())
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}
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return []byte(out)
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}
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func convertClaudeContentPart(part gjson.Result) (string, bool) {
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partType := part.Get("type").String()
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switch partType {
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case "text":
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text := part.Get("text").String()
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if strings.TrimSpace(text) == "" {
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return "", false
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}
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textContent := `{"type":"text","text":""}`
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textContent, _ = sjson.Set(textContent, "text", text)
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return textContent, true
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case "image":
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var imageURL string
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if source := part.Get("source"); source.Exists() {
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sourceType := source.Get("type").String()
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switch sourceType {
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case "base64":
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mediaType := source.Get("media_type").String()
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if mediaType == "" {
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mediaType = "application/octet-stream"
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}
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data := source.Get("data").String()
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if data != "" {
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imageURL = "data:" + mediaType + ";base64," + data
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}
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case "url":
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imageURL = source.Get("url").String()
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}
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}
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if imageURL == "" {
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imageURL = part.Get("url").String()
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}
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if imageURL == "" {
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return "", false
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}
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imageContent := `{"type":"image_url","image_url":{"url":""}}`
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imageContent, _ = sjson.Set(imageContent, "image_url.url", imageURL)
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return imageContent, true
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default:
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return "", false
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}
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}
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