mirror of
https://github.com/router-for-me/CLIProxyAPI.git
synced 2026-02-03 04:50:52 +08:00
Add Claude compatibility and enhance API handling
- Integrated Claude API compatibility in handlers, translators, and server routes. - Introduced `/messages` endpoint and upgraded `AuthMiddleware` for `X-Api-Key` header. - Improved streaming response handling with `ConvertCliToClaude` for SSE compatibility. - Enhanced request processing and tool-response mapping in translators. - Updated README to reflect Claude integration and clarify supported features.
This commit is contained in:
Luis Pater
@@ -1,6 +1,7 @@
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package translator
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import (
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"bytes"
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"fmt"
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"time"
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@@ -188,3 +189,194 @@ func ConvertCliToOpenAINonStream(rawJson []byte, unixTimestamp int64, isGlAPIKey
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return template
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}
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// ConvertCliToClaude performs sophisticated streaming response format conversion.
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// This function implements a complex state machine that translates backend client responses
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// into Claude-compatible Server-Sent Events (SSE) format. It manages different response types
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// and handles state transitions between content blocks, thinking processes, and function calls.
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//
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// Response type states: 0=none, 1=content, 2=thinking, 3=function
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// The function maintains state across multiple calls to ensure proper SSE event sequencing.
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func ConvertCliToClaude(rawJson []byte, isGlAPIKey, hasFirstResponse bool, responseType, responseIndex *int) string {
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// Normalize the response format for different API key types
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// Generative Language API keys have a different response structure
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if isGlAPIKey {
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rawJson, _ = sjson.SetRawBytes(rawJson, "response", rawJson)
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}
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// Track whether tools are being used in this response chunk
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usedTool := false
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output := ""
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// Initialize the streaming session with a message_start event
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// This is only sent for the very first response chunk
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if !hasFirstResponse {
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output = "event: message_start\n"
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// Create the initial message structure with default values
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// This follows the Claude API specification for streaming message initialization
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messageStartTemplate := `{"type": "message_start", "message": {"id": "msg_1nZdL29xx5MUA1yADyHTEsnR8uuvGzszyY", "type": "message", "role": "assistant", "content": [], "model": "claude-3-5-sonnet-20241022", "stop_reason": null, "stop_sequence": null, "usage": {"input_tokens": 0, "output_tokens": 0}}}`
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// Override default values with actual response metadata if available
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if modelVersionResult := gjson.GetBytes(rawJson, "response.modelVersion"); modelVersionResult.Exists() {
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messageStartTemplate, _ = sjson.Set(messageStartTemplate, "message.model", modelVersionResult.String())
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}
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if responseIdResult := gjson.GetBytes(rawJson, "response.responseId"); responseIdResult.Exists() {
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messageStartTemplate, _ = sjson.Set(messageStartTemplate, "message.id", responseIdResult.String())
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}
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output = output + fmt.Sprintf("data: %s\n\n\n", messageStartTemplate)
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}
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// Process the response parts array from the backend client
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// Each part can contain text content, thinking content, or function calls
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partsResult := gjson.GetBytes(rawJson, "response.candidates.0.content.parts")
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if partsResult.IsArray() {
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partResults := partsResult.Array()
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for i := 0; i < len(partResults); i++ {
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partResult := partResults[i]
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// Extract the different types of content from each part
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partTextResult := partResult.Get("text")
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functionCallResult := partResult.Get("functionCall")
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// Handle text content (both regular content and thinking)
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if partTextResult.Exists() {
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// Process thinking content (internal reasoning)
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if partResult.Get("thought").Bool() {
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// Continue existing thinking block
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if *responseType == 2 {
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output = output + "event: content_block_delta\n"
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data, _ := sjson.Set(fmt.Sprintf(`{"type":"content_block_delta","index":%d,"delta":{"type":"thinking_delta","thinking":""}}`, *responseIndex), "delta.thinking", partTextResult.String())
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output = output + fmt.Sprintf("data: %s\n\n\n", data)
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} else {
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// Transition from another state to thinking
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// First, close any existing content block
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if *responseType != 0 {
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if *responseType == 2 {
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output = output + "event: content_block_delta\n"
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output = output + fmt.Sprintf(`data: {"type":"content_block_delta","index":%d,"delta":{"type":"signature_delta","signature":null}}`, *responseIndex)
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output = output + "\n\n\n"
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}
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output = output + "event: content_block_stop\n"
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output = output + fmt.Sprintf(`data: {"type":"content_block_stop","index":%d}`, *responseIndex)
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output = output + "\n\n\n"
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*responseIndex++
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}
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// Start a new thinking content block
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output = output + "event: content_block_start\n"
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output = output + fmt.Sprintf(`data: {"type":"content_block_start","index":%d,"content_block":{"type":"thinking","thinking":""}}`, *responseIndex)
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output = output + "\n\n\n"
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output = output + "event: content_block_delta\n"
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data, _ := sjson.Set(fmt.Sprintf(`{"type":"content_block_delta","index":%d,"delta":{"type":"thinking_delta","thinking":""}}`, *responseIndex), "delta.thinking", partTextResult.String())
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output = output + fmt.Sprintf("data: %s\n\n\n", data)
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*responseType = 2 // Set state to thinking
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}
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} else {
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// Process regular text content (user-visible output)
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// Continue existing text block
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if *responseType == 1 {
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output = output + "event: content_block_delta\n"
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data, _ := sjson.Set(fmt.Sprintf(`{"type":"content_block_delta","index":%d,"delta":{"type":"text_delta","text":""}}`, *responseIndex), "delta.text", partTextResult.String())
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output = output + fmt.Sprintf("data: %s\n\n\n", data)
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} else {
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// Transition from another state to text content
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// First, close any existing content block
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if *responseType != 0 {
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if *responseType == 2 {
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output = output + "event: content_block_delta\n"
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output = output + fmt.Sprintf(`data: {"type":"content_block_delta","index":%d,"delta":{"type":"signature_delta","signature":null}}`, *responseIndex)
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output = output + "\n\n\n"
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}
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output = output + "event: content_block_stop\n"
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output = output + fmt.Sprintf(`data: {"type":"content_block_stop","index":%d}`, *responseIndex)
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output = output + "\n\n\n"
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*responseIndex++
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}
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// Start a new text content block
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output = output + "event: content_block_start\n"
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output = output + fmt.Sprintf(`data: {"type":"content_block_start","index":%d,"content_block":{"type":"text","text":""}}`, *responseIndex)
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output = output + "\n\n\n"
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output = output + "event: content_block_delta\n"
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data, _ := sjson.Set(fmt.Sprintf(`{"type":"content_block_delta","index":%d,"delta":{"type":"text_delta","text":""}}`, *responseIndex), "delta.text", partTextResult.String())
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output = output + fmt.Sprintf("data: %s\n\n\n", data)
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*responseType = 1 // Set state to content
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}
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}
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} else if functionCallResult.Exists() {
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// Handle function/tool calls from the AI model
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// This processes tool usage requests and formats them for Claude API compatibility
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usedTool = true
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fcName := functionCallResult.Get("name").String()
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// Handle state transitions when switching to function calls
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// Close any existing function call block first
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if *responseType == 3 {
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output = output + "event: content_block_stop\n"
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output = output + fmt.Sprintf(`data: {"type":"content_block_stop","index":%d}`, *responseIndex)
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output = output + "\n\n\n"
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*responseIndex++
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*responseType = 0
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}
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// Special handling for thinking state transition
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if *responseType == 2 {
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output = output + "event: content_block_delta\n"
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output = output + fmt.Sprintf(`data: {"type":"content_block_delta","index":%d,"delta":{"type":"signature_delta","signature":null}}`, *responseIndex)
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output = output + "\n\n\n"
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}
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// Close any other existing content block
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if *responseType != 0 {
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output = output + "event: content_block_stop\n"
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output = output + fmt.Sprintf(`data: {"type":"content_block_stop","index":%d}`, *responseIndex)
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output = output + "\n\n\n"
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*responseIndex++
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}
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// Start a new tool use content block
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// This creates the structure for a function call in Claude format
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output = output + "event: content_block_start\n"
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// Create the tool use block with unique ID and function details
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data := fmt.Sprintf(`{"type":"content_block_start","index":%d,"content_block":{"type":"tool_use","id":"","name":"","input":{}}}`, *responseIndex)
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data, _ = sjson.Set(data, "content_block.id", fmt.Sprintf("%s-%d", fcName, time.Now().UnixNano()))
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data, _ = sjson.Set(data, "content_block.name", fcName)
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output = output + fmt.Sprintf("data: %s\n\n\n", data)
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if fcArgsResult := functionCallResult.Get("args"); fcArgsResult.Exists() {
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output = output + "event: content_block_delta\n"
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data, _ = sjson.Set(fmt.Sprintf(`{"type":"content_block_delta","index":%d,"delta":{"type":"input_json_delta","partial_json":""}}`, *responseIndex), "delta.partial_json", fcArgsResult.Raw)
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output = output + fmt.Sprintf("data: %s\n\n\n", data)
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}
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*responseType = 3
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}
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}
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}
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usageResult := gjson.GetBytes(rawJson, "response.usageMetadata")
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if usageResult.Exists() && bytes.Contains(rawJson, []byte(`"finishReason"`)) {
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if candidatesTokenCountResult := usageResult.Get("candidatesTokenCount"); candidatesTokenCountResult.Exists() {
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output = output + "event: content_block_stop\n"
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output = output + fmt.Sprintf(`data: {"type":"content_block_stop","index":%d}`, *responseIndex)
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output = output + "\n\n\n"
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output = output + "event: message_delta\n"
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output = output + `data: `
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template := `{"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null},"usage":{"input_tokens":0,"output_tokens":0}}`
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if usedTool {
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template = `{"type":"message_delta","delta":{"stop_reason":"tool_use","stop_sequence":null},"usage":{"input_tokens":0,"output_tokens":0}}`
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}
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thoughtsTokenCount := usageResult.Get("thoughtsTokenCount").Int()
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template, _ = sjson.Set(template, "usage.output_tokens", candidatesTokenCountResult.Int()+thoughtsTokenCount)
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template, _ = sjson.Set(template, "usage.input_tokens", usageResult.Get("promptTokenCount").Int())
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output = output + template + "\n\n\n"
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}
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}
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return output
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}
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