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fix: Claude stream block index/type transitions

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Seefs
2026-02-05 19:32:26 +08:00
parent fca80a57ad
commit 7314c974f3
2 changed files with 67 additions and 25 deletions
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3
relay/common/relay_info.go
View File

@@ -37,6 +37,9 @@ type ClaudeConvertInfo struct {
Usage *dto.Usage
FinishReason string
Done bool
ToolCallBaseIndex int
ToolCallMaxIndexOffset int
}
type RerankerInfo struct {

89
service/convert.go
View File

@@ -207,6 +207,44 @@ func StreamResponseOpenAI2Claude(openAIResponse *dto.ChatCompletionsStreamRespon
}
var claudeResponses []*dto.ClaudeResponse
// stopOpenBlocks emits the required content_block_stop event(s) for the currently open block(s)
// according to Anthropic's SSE streaming state machine:
// content_block_start -> content_block_delta* -> content_block_stop (per index).
//
// For text/thinking, there is at most one open block at info.ClaudeConvertInfo.Index.
// For tools, OpenAI tool_calls can stream multiple parallel tool_use blocks (indexed from 0),
// so we may have multiple open blocks and must stop each one explicitly.
stopOpenBlocks := func() {
switch info.ClaudeConvertInfo.LastMessagesType {
case relaycommon.LastMessageTypeText, relaycommon.LastMessageTypeThinking:
claudeResponses = append(claudeResponses, generateStopBlock(info.ClaudeConvertInfo.Index))
case relaycommon.LastMessageTypeTools:
base := info.ClaudeConvertInfo.ToolCallBaseIndex
for offset := 0; offset <= info.ClaudeConvertInfo.ToolCallMaxIndexOffset; offset++ {
claudeResponses = append(claudeResponses, generateStopBlock(base+offset))
}
}
}
// stopOpenBlocksAndAdvance closes the currently open block(s) and advances the content block index
// to the next available slot for subsequent content_block_start events.
//
// This prevents invalid streams where a content_block_delta (e.g. thinking_delta) is emitted for an
// index whose active content_block type is different (the typical cause of "Mismatched content block type").
stopOpenBlocksAndAdvance := func() {
if info.ClaudeConvertInfo.LastMessagesType == relaycommon.LastMessageTypeNone {
return
}
stopOpenBlocks()
switch info.ClaudeConvertInfo.LastMessagesType {
case relaycommon.LastMessageTypeTools:
info.ClaudeConvertInfo.Index = info.ClaudeConvertInfo.ToolCallBaseIndex + info.ClaudeConvertInfo.ToolCallMaxIndexOffset + 1
info.ClaudeConvertInfo.ToolCallBaseIndex = 0
info.ClaudeConvertInfo.ToolCallMaxIndexOffset = 0
default:
info.ClaudeConvertInfo.Index++
}
info.ClaudeConvertInfo.LastMessagesType = relaycommon.LastMessageTypeNone
}
if info.SendResponseCount == 1 {
msg := &dto.ClaudeMediaMessage{
Id: openAIResponse.Id,
@@ -228,6 +266,8 @@ func StreamResponseOpenAI2Claude(openAIResponse *dto.ChatCompletionsStreamRespon
//})
if openAIResponse.IsToolCall() {
info.ClaudeConvertInfo.LastMessagesType = relaycommon.LastMessageTypeTools
info.ClaudeConvertInfo.ToolCallBaseIndex = 0
info.ClaudeConvertInfo.ToolCallMaxIndexOffset = 0
var toolCall dto.ToolCallResponse
if len(openAIResponse.Choices) > 0 && len(openAIResponse.Choices[0].Delta.ToolCalls) > 0 {
toolCall = openAIResponse.Choices[0].Delta.ToolCalls[0]
@@ -271,9 +311,8 @@ func StreamResponseOpenAI2Claude(openAIResponse *dto.ChatCompletionsStreamRespon
content := openAIResponse.Choices[0].Delta.GetContentString()
if reasoning != "" {
if info.ClaudeConvertInfo.LastMessagesType == relaycommon.LastMessageTypeTools || info.ClaudeConvertInfo.LastMessagesType == relaycommon.LastMessageTypeText {
claudeResponses = append(claudeResponses, generateStopBlock(info.ClaudeConvertInfo.Index))
info.ClaudeConvertInfo.Index++
if info.ClaudeConvertInfo.LastMessagesType != relaycommon.LastMessageTypeThinking {
stopOpenBlocksAndAdvance()
}
idx := info.ClaudeConvertInfo.Index
claudeResponses = append(claudeResponses, &dto.ClaudeResponse{
@@ -295,9 +334,8 @@ func StreamResponseOpenAI2Claude(openAIResponse *dto.ChatCompletionsStreamRespon
})
info.ClaudeConvertInfo.LastMessagesType = relaycommon.LastMessageTypeThinking
} else if content != "" {
if info.ClaudeConvertInfo.LastMessagesType == relaycommon.LastMessageTypeTools || info.ClaudeConvertInfo.LastMessagesType == relaycommon.LastMessageTypeThinking {
claudeResponses = append(claudeResponses, generateStopBlock(info.ClaudeConvertInfo.Index))
info.ClaudeConvertInfo.Index++
if info.ClaudeConvertInfo.LastMessagesType != relaycommon.LastMessageTypeText {
stopOpenBlocksAndAdvance()
}
idx := info.ClaudeConvertInfo.Index
claudeResponses = append(claudeResponses, &dto.ClaudeResponse{
@@ -324,7 +362,7 @@ func StreamResponseOpenAI2Claude(openAIResponse *dto.ChatCompletionsStreamRespon
// 如果首块就带 finish_reason，需要立即发送停止块
if len(openAIResponse.Choices) > 0 && openAIResponse.Choices[0].FinishReason != nil && *openAIResponse.Choices[0].FinishReason != "" {
info.FinishReason = *openAIResponse.Choices[0].FinishReason
claudeResponses = append(claudeResponses, generateStopBlock(info.ClaudeConvertInfo.Index))
stopOpenBlocks()
oaiUsage := openAIResponse.Usage
if oaiUsage == nil {
oaiUsage = info.ClaudeConvertInfo.Usage
@@ -355,7 +393,7 @@ func StreamResponseOpenAI2Claude(openAIResponse *dto.ChatCompletionsStreamRespon
// no choices
// 可能为非标准的 OpenAI 响应，判断是否已经完成
if info.ClaudeConvertInfo.Done {
claudeResponses = append(claudeResponses, generateStopBlock(info.ClaudeConvertInfo.Index))
stopOpenBlocks()
oaiUsage := info.ClaudeConvertInfo.Usage
if oaiUsage != nil {
claudeResponses = append(claudeResponses, &dto.ClaudeResponse{
@@ -389,18 +427,25 @@ func StreamResponseOpenAI2Claude(openAIResponse *dto.ChatCompletionsStreamRespon
if len(chosenChoice.Delta.ToolCalls) > 0 {
toolCalls := chosenChoice.Delta.ToolCalls
if info.ClaudeConvertInfo.LastMessagesType != relaycommon.LastMessageTypeTools {
claudeResponses = append(claudeResponses, generateStopBlock(info.ClaudeConvertInfo.Index))
info.ClaudeConvertInfo.Index++
stopOpenBlocksAndAdvance()
info.ClaudeConvertInfo.ToolCallBaseIndex = info.ClaudeConvertInfo.Index
info.ClaudeConvertInfo.ToolCallMaxIndexOffset = 0
}
info.ClaudeConvertInfo.LastMessagesType = relaycommon.LastMessageTypeTools
base := info.ClaudeConvertInfo.ToolCallBaseIndex
maxOffset := info.ClaudeConvertInfo.ToolCallMaxIndexOffset
for i, toolCall := range toolCalls {
blockIndex := info.ClaudeConvertInfo.Index
offset := 0
if toolCall.Index != nil {
blockIndex = *toolCall.Index
} else if len(toolCalls) > 1 {
blockIndex = info.ClaudeConvertInfo.Index + i
offset = *toolCall.Index
} else {
offset = i
}
if offset > maxOffset {
maxOffset = offset
}
blockIndex := base + offset
idx := blockIndex
if toolCall.Function.Name != "" {
@@ -426,19 +471,16 @@ func StreamResponseOpenAI2Claude(openAIResponse *dto.ChatCompletionsStreamRespon
},
})
}
info.ClaudeConvertInfo.Index = blockIndex
}
info.ClaudeConvertInfo.ToolCallMaxIndexOffset = maxOffset
info.ClaudeConvertInfo.Index = base + maxOffset
} else {
reasoning := chosenChoice.Delta.GetReasoningContent()
textContent := chosenChoice.Delta.GetContentString()
if reasoning != "" || textContent != "" {
if reasoning != "" {
if info.ClaudeConvertInfo.LastMessagesType != relaycommon.LastMessageTypeThinking {
if info.ClaudeConvertInfo.LastMessagesType == relaycommon.LastMessageTypeText || info.ClaudeConvertInfo.LastMessagesType == relaycommon.LastMessageTypeTools {
claudeResponses = append(claudeResponses, generateStopBlock(info.ClaudeConvertInfo.Index))
info.ClaudeConvertInfo.Index++
}
stopOpenBlocksAndAdvance()
idx := info.ClaudeConvertInfo.Index
claudeResponses = append(claudeResponses, &dto.ClaudeResponse{
Index: &idx,
@@ -456,10 +498,7 @@ func StreamResponseOpenAI2Claude(openAIResponse *dto.ChatCompletionsStreamRespon
}
} else {
if info.ClaudeConvertInfo.LastMessagesType != relaycommon.LastMessageTypeText {
if info.ClaudeConvertInfo.LastMessagesType == relaycommon.LastMessageTypeThinking || info.ClaudeConvertInfo.LastMessagesType == relaycommon.LastMessageTypeTools {
claudeResponses = append(claudeResponses, generateStopBlock(info.ClaudeConvertInfo.Index))
info.ClaudeConvertInfo.Index++
}
stopOpenBlocksAndAdvance()
idx := info.ClaudeConvertInfo.Index
claudeResponses = append(claudeResponses, &dto.ClaudeResponse{
Index: &idx,
@@ -487,7 +526,7 @@ func StreamResponseOpenAI2Claude(openAIResponse *dto.ChatCompletionsStreamRespon
}
if doneChunk || info.ClaudeConvertInfo.Done {
claudeResponses = append(claudeResponses, generateStopBlock(info.ClaudeConvertInfo.Index))
stopOpenBlocks()
oaiUsage := openAIResponse.Usage
if oaiUsage == nil {
oaiUsage = info.ClaudeConvertInfo.Usage