nianzs
459 lines
14 KiB
Go
459 lines
14 KiB
Go
package service
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"net/http"
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"strings"
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"sync"
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kiropkg "github.com/Wei-Shaw/sub2api/internal/pkg/kiro"
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)
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const kiroMaxWebSearchIterations = 5
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var (
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errKiroWebSearchFallback = errors.New("kiro web search fallback")
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kiroWebSearchDescCache sync.Map
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)
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type kiroWebSearchExecution struct {
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ResponseBody []byte
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Usage ClaudeUsage
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RequestID string
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}
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type kiroWebSearchHTTPError struct {
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Response *http.Response
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}
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type kiroStreamChunkCollector struct {
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chunks [][]byte
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}
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func (e *kiroWebSearchHTTPError) Error() string {
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if e == nil || e.Response == nil {
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return "kiro web search http error"
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}
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return fmt.Sprintf("kiro web search http error: %d", e.Response.StatusCode)
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}
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func (w *kiroStreamChunkCollector) Write(p []byte) (int, error) {
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if len(p) > 0 {
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w.chunks = append(w.chunks, append([]byte(nil), p...))
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}
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return len(p), nil
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}
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func bufferKiroAnthropicStream(ctx context.Context, body io.Reader, mappedModel string, inputTokens int) ([][]byte, *kiropkg.StreamResult, error) {
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collector := &kiroStreamChunkCollector{}
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result, err := kiropkg.StreamEventStreamAsAnthropic(ctx, body, collector, mappedModel, inputTokens)
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if err != nil {
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return nil, nil, err
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}
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return collector.chunks, result, nil
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}
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func writeSSEChunks(w io.Writer, chunks [][]byte) error {
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for _, chunk := range chunks {
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if len(chunk) == 0 {
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continue
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}
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if _, err := w.Write(chunk); err != nil {
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return err
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}
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}
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return nil
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}
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func writeAnthropicMessageStart(w io.Writer, msgID, model string, inputTokens int) error {
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if strings.TrimSpace(msgID) == "" {
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msgID = "msg_" + kiropkg.GenerateToolUseID()
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}
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if strings.TrimSpace(model) == "" {
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model = "kiro"
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}
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payload, err := json.Marshal(map[string]any{
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"type": "message_start",
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"message": map[string]any{
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"id": msgID,
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"type": "message",
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"role": "assistant",
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"model": model,
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"content": []any{},
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"stop_reason": nil,
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"stop_sequence": nil,
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"usage": map[string]any{
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"input_tokens": inputTokens,
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"output_tokens": 0,
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"cache_creation_input_tokens": 0,
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"cache_read_input_tokens": 0,
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},
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},
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})
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if err != nil {
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return err
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}
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_, err = io.WriteString(w, "event: message_start\ndata: "+string(payload)+"\n\n")
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return err
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}
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func (s *GatewayService) streamKiroWebSearchAsAnthropic(
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ctx context.Context, account *Account, anthropicBody []byte, mappedModel, requestModel, token string, inputTokens int, headers http.Header, w io.Writer,
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) error {
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query := kiropkg.ExtractSearchQuery(anthropicBody)
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if strings.TrimSpace(query) == "" {
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return errKiroWebSearchFallback
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}
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currentBody, err := kiropkg.ReplaceWebSearchToolDescription(anthropicBody)
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if err != nil {
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currentBody = anthropicBody
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}
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currentToolUseID := "srvtoolu_" + kiropkg.GenerateToolUseID()
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nextContentBlockIndex := 0
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if err := writeAnthropicMessageStart(w, "", mappedModel, inputTokens); err != nil {
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return err
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}
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for iteration := 0; iteration < kiroMaxWebSearchIterations; iteration++ {
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s.prefetchKiroWebSearchDescription(ctx, account, token)
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results, nextToken, mcpErr := s.callKiroWebSearchMCP(ctx, account, token, query)
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if strings.TrimSpace(nextToken) != "" {
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token = nextToken
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}
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if mcpErr != nil {
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results = nil
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}
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if err := writeSSEChunks(w, kiropkg.GenerateSearchIndicatorEvents(query, currentToolUseID, results, nextContentBlockIndex)); err != nil {
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return err
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}
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nextContentBlockIndex += 2
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currentBody, err = kiropkg.InjectToolResultsClaude(currentBody, currentToolUseID, query, results)
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if err != nil {
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return errKiroWebSearchFallback
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}
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resp, _, err := s.executeKiroUpstream(ctx, account, currentBody, mappedModel, requestModel, token, headers)
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if err != nil {
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return err
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}
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if resp.StatusCode < 200 || resp.StatusCode >= 300 {
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return &kiroWebSearchHTTPError{Response: resp}
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}
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chunks, _, streamErr := func() ([][]byte, *kiropkg.StreamResult, error) {
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defer func() { _ = resp.Body.Close() }()
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return bufferKiroAnthropicStream(ctx, resp.Body, mappedModel, inputTokens)
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}()
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if streamErr != nil {
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return streamErr
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}
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analysis := kiropkg.AnalyzeBufferedStream(chunks)
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if analysis.HasWebSearchToolUse && strings.TrimSpace(analysis.WebSearchQuery) != "" && iteration+1 < kiroMaxWebSearchIterations {
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filtered := kiropkg.FilterChunksForClient(chunks, analysis.WebSearchToolUseIndex, nextContentBlockIndex)
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if err := writeSSEChunks(w, filtered); err != nil {
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return err
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}
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if maxIndex := kiropkg.MaxContentBlockIndex(filtered); maxIndex >= nextContentBlockIndex {
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nextContentBlockIndex = maxIndex + 1
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}
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query = analysis.WebSearchQuery
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if strings.TrimSpace(analysis.WebSearchToolUseID) == "" {
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currentToolUseID = "srvtoolu_" + kiropkg.GenerateToolUseID()
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} else {
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currentToolUseID = analysis.WebSearchToolUseID
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}
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continue
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}
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for _, chunk := range chunks {
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adjusted, shouldForward := kiropkg.AdjustSSEChunk(chunk, nextContentBlockIndex)
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if !shouldForward {
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continue
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}
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if _, err := w.Write(adjusted); err != nil {
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return err
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}
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}
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return nil
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}
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return fmt.Errorf("kiro web search exceeded max iterations")
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}
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func (s *GatewayService) executeKiroWebSearch(ctx context.Context, account *Account, anthropicBody []byte, mappedModel, requestModel, token string, headers http.Header) (*kiroWebSearchExecution, error) {
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query := kiropkg.ExtractSearchQuery(anthropicBody)
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if strings.TrimSpace(query) == "" {
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return nil, errKiroWebSearchFallback
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}
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currentBody, err := kiropkg.ReplaceWebSearchToolDescription(anthropicBody)
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if err != nil {
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currentBody = anthropicBody
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}
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inputTokens := estimateKiroInputTokens(anthropicBody)
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currentToolUseID := "srvtoolu_" + kiropkg.GenerateToolUseID()
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searches := make([]kiropkg.SearchIndicator, 0, 2)
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requestID := ""
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for iteration := 0; iteration < kiroMaxWebSearchIterations; iteration++ {
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s.prefetchKiroWebSearchDescription(ctx, account, token)
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results, nextToken, mcpErr := s.callKiroWebSearchMCP(ctx, account, token, query)
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if strings.TrimSpace(nextToken) != "" {
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token = nextToken
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}
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if mcpErr != nil {
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results = nil
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}
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searches = append(searches, kiropkg.SearchIndicator{
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ToolUseID: currentToolUseID,
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Query: query,
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Results: results,
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})
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currentBody, err = kiropkg.InjectToolResultsClaude(currentBody, currentToolUseID, query, results)
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if err != nil {
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return nil, errKiroWebSearchFallback
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}
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resp, _, err := s.executeKiroUpstream(ctx, account, currentBody, mappedModel, requestModel, token, headers)
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if err != nil {
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return nil, err
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}
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if resp.StatusCode < 200 || resp.StatusCode >= 300 {
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return nil, &kiroWebSearchHTTPError{Response: resp}
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}
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parseResult, parseErr := func() (*kiropkg.ParseResult, error) {
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defer func() { _ = resp.Body.Close() }()
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return kiropkg.ParseNonStreamingEventStream(resp.Body, mappedModel)
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}()
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if parseErr != nil {
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return nil, parseErr
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}
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if requestID == "" {
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requestID = buildKiroRequestID(resp)
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}
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nextToolUseID, nextQuery, hasNext := kiropkg.ExtractWebSearchToolUseFromResponse(parseResult.ResponseBody)
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if !hasNext || strings.TrimSpace(nextQuery) == "" || iteration+1 >= kiroMaxWebSearchIterations {
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finalBody, injectErr := kiropkg.InjectSearchIndicatorsInResponse(parseResult.ResponseBody, searches)
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if injectErr == nil {
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parseResult.ResponseBody = finalBody
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}
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return &kiroWebSearchExecution{
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ResponseBody: parseResult.ResponseBody,
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Usage: kiroUsageToClaude(parseResult.Usage, inputTokens),
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RequestID: requestID,
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}, nil
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}
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query = nextQuery
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if strings.TrimSpace(nextToolUseID) == "" {
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nextToolUseID = "srvtoolu_" + kiropkg.GenerateToolUseID()
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}
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currentToolUseID = nextToolUseID
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}
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return nil, fmt.Errorf("kiro web search exceeded max iterations")
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}
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func (s *GatewayService) prefetchKiroWebSearchDescription(ctx context.Context, account *Account, token string) {
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endpoint := kiropkg.BuildMcpEndpoint(kiroAPIRegion(account))
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if cached, ok := kiroWebSearchDescCache.Load(endpoint); ok {
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if desc, ok := cached.(string); ok && strings.TrimSpace(desc) != "" {
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kiropkg.SetCachedWebSearchDescription(desc)
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}
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return
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}
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reqBody, _ := json.Marshal(kiropkg.MCPRequest{
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ID: "tools_list",
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JSONRPC: "2.0",
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Method: "tools/list",
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})
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resp, _, err := s.doKiroMCPJSONRequest(ctx, account, endpoint, reqBody, token)
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if err != nil || resp == nil {
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return
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}
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defer func() { _ = resp.Body.Close() }()
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if resp.StatusCode != http.StatusOK {
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return
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}
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return
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}
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var result kiropkg.MCPResponse
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if err := json.Unmarshal(body, &result); err != nil || result.Result == nil {
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return
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}
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for _, tool := range result.Result.Tools {
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if strings.EqualFold(tool.Name, "web_search") && strings.TrimSpace(tool.Description) != "" {
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kiroWebSearchDescCache.Store(endpoint, tool.Description)
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kiropkg.SetCachedWebSearchDescription(tool.Description)
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return
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}
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}
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}
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func (s *GatewayService) callKiroWebSearchMCP(ctx context.Context, account *Account, token, query string) (*kiropkg.WebSearchResults, string, error) {
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reqBody, err := json.Marshal(buildKiroWebSearchMCPRequest(query))
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if err != nil {
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return nil, token, err
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}
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endpoint := kiropkg.BuildMcpEndpoint(kiroAPIRegion(account))
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resp, nextToken, err := s.doKiroMCPJSONRequest(ctx, account, endpoint, reqBody, token)
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if err != nil {
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return nil, nextToken, err
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}
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if resp == nil {
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return nil, nextToken, fmt.Errorf("kiro web search returned nil response")
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}
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defer func() { _ = resp.Body.Close() }()
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, nextToken, err
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}
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if resp.StatusCode != http.StatusOK {
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return nil, nextToken, fmt.Errorf("kiro mcp status %d: %s", resp.StatusCode, strings.TrimSpace(string(body)))
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}
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var parsed kiropkg.MCPResponse
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if err := json.Unmarshal(body, &parsed); err != nil {
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return nil, nextToken, err
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}
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if parsed.Error != nil {
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msg := "unknown error"
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if parsed.Error.Message != nil && strings.TrimSpace(*parsed.Error.Message) != "" {
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msg = strings.TrimSpace(*parsed.Error.Message)
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}
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code := 0
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if parsed.Error.Code != nil {
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code = *parsed.Error.Code
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}
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return nil, nextToken, fmt.Errorf("kiro mcp error %d: %s", code, msg)
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}
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return kiropkg.ParseSearchResults(&parsed), nextToken, nil
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}
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func buildKiroWebSearchMCPRequest(query string) kiropkg.MCPRequest {
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return kiropkg.MCPRequest{
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ID: fmt.Sprintf("web_search_%s", kiropkg.GenerateToolUseID()),
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JSONRPC: "2.0",
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Method: "tools/call",
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Params: map[string]interface{}{
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"name": "web_search",
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"arguments": map[string]interface{}{
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"query": query,
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"_meta": map[string]interface{}{
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"_isValid": true,
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"_activePath": []string{"query"},
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"_completedPaths": [][]string{{"query"}},
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},
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},
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},
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}
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}
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func (s *GatewayService) doKiroMCPJSONRequest(ctx context.Context, account *Account, endpoint string, payload []byte, token string) (*http.Response, string, error) {
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currentToken := token
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accountKey := buildKiroAccountKey(account)
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proxyURL := kiroProxyURL(account)
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tlsProfile := s.tlsFPProfileService.ResolveTLSProfile(account)
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for attempt := 0; attempt < 3; attempt++ {
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if err := s.checkAndWaitKiroCooldown(ctx, accountKey); err != nil {
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if failoverErr := asKiroCooldownFailoverError(err); failoverErr != nil {
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return nil, currentToken, failoverErr
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}
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return nil, currentToken, err
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}
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req, err := newKiroJSONRequest(ctx, endpoint, payload, currentToken, accountKey, buildKiroMachineID(account), "", account)
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if err != nil {
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return nil, currentToken, err
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}
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resp, err := s.httpUpstream.DoWithTLS(req, proxyURL, account.ID, account.Concurrency, tlsProfile)
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if err != nil {
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return nil, currentToken, err
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}
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if resp.StatusCode == http.StatusUnauthorized || resp.StatusCode == http.StatusForbidden {
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respBody, readErr := io.ReadAll(resp.Body)
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_ = resp.Body.Close()
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if readErr != nil {
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return nil, currentToken, readErr
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}
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if resp.StatusCode == http.StatusForbidden && isKiroSuspendedBody(respBody) {
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if _, err := s.markKiroSuspended(ctx, accountKey); err != nil {
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return nil, currentToken, err
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}
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resp.Body = io.NopCloser(strings.NewReader(string(respBody)))
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return resp, currentToken, nil
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}
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if resp.StatusCode == http.StatusForbidden && !isKiroTokenErrorBody(respBody) {
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resp.Body = io.NopCloser(strings.NewReader(string(respBody)))
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return resp, currentToken, nil
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}
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if s.kiroTokenProvider == nil {
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resp.Body = io.NopCloser(strings.NewReader(string(respBody)))
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return resp, currentToken, nil
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}
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refreshedToken, refreshErr := s.kiroTokenProvider.ForceRefreshAccessToken(ctx, account)
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if refreshErr != nil {
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resp.Body = io.NopCloser(strings.NewReader(string(respBody)))
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return resp, currentToken, nil
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}
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currentToken = refreshedToken
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accountKey = buildKiroAccountKey(account)
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if sleepErr := sleepKiroRetry(ctx, attempt); sleepErr != nil {
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return nil, currentToken, sleepErr
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}
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continue
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}
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if resp.StatusCode == http.StatusTooManyRequests {
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if _, err := s.markKiro429(ctx, accountKey); err != nil {
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_ = resp.Body.Close()
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return nil, currentToken, err
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}
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}
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if resp.StatusCode == http.StatusRequestTimeout || resp.StatusCode >= 500 {
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if attempt < 2 {
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_ = resp.Body.Close()
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if sleepErr := sleepKiroRetry(ctx, attempt); sleepErr != nil {
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return nil, currentToken, sleepErr
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}
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continue
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}
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}
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if resp.StatusCode >= 200 && resp.StatusCode < 300 {
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if err := s.markKiroSuccess(ctx, accountKey); err != nil {
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_ = resp.Body.Close()
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return nil, currentToken, err
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}
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}
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return resp, currentToken, nil
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}
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return nil, currentToken, fmt.Errorf("kiro mcp request retries exhausted")
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}
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