File size: 6,384 Bytes
8d3471e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 | package claude
import (
"fmt"
"net/http"
"strings"
"time"
"ds2api/internal/responsehistory"
"ds2api/internal/sse"
streamengine "ds2api/internal/stream"
"ds2api/internal/toolcall"
"ds2api/internal/toolstream"
)
type claudeStreamRuntime struct {
w http.ResponseWriter
rc *http.ResponseController
canFlush bool
model string
toolNames []string
messages []any
toolsRaw any
promptTokenText string
thinkingEnabled bool
searchEnabled bool
bufferToolContent bool
stripReferenceMarkers bool
messageID string
thinking strings.Builder
text strings.Builder
sieve toolstream.State
rawText strings.Builder
rawThinking strings.Builder
toolDetectionThinking strings.Builder
toolCallsDetected bool
nextBlockIndex int
thinkingBlockOpen bool
thinkingBlockIndex int
textBlockOpen bool
textBlockIndex int
textEmitted bool
ended bool
upstreamErr string
history *responsehistory.Session
}
func newClaudeStreamRuntime(
w http.ResponseWriter,
rc *http.ResponseController,
canFlush bool,
model string,
messages []any,
thinkingEnabled bool,
searchEnabled bool,
stripReferenceMarkers bool,
toolNames []string,
toolsRaw any,
promptTokenText string,
history *responsehistory.Session,
) *claudeStreamRuntime {
return &claudeStreamRuntime{
w: w,
rc: rc,
canFlush: canFlush,
model: model,
messages: messages,
thinkingEnabled: thinkingEnabled,
searchEnabled: searchEnabled,
bufferToolContent: len(toolNames) > 0,
stripReferenceMarkers: stripReferenceMarkers,
toolNames: toolNames,
toolsRaw: toolsRaw,
promptTokenText: promptTokenText,
history: history,
messageID: fmt.Sprintf("msg_%d", time.Now().UnixNano()),
thinkingBlockIndex: -1,
textBlockIndex: -1,
}
}
func (s *claudeStreamRuntime) onParsed(parsed sse.LineResult) streamengine.ParsedDecision {
if !parsed.Parsed {
return streamengine.ParsedDecision{}
}
if parsed.ErrorMessage != "" {
s.upstreamErr = parsed.ErrorMessage
return streamengine.ParsedDecision{Stop: true, StopReason: streamengine.StopReason("upstream_error")}
}
if parsed.Stop {
return streamengine.ParsedDecision{Stop: true}
}
contentSeen := false
for _, p := range parsed.ToolDetectionThinkingParts {
trimmed := sse.TrimContinuationOverlapFromBuilder(&s.toolDetectionThinking, p.Text)
if trimmed != "" {
s.toolDetectionThinking.WriteString(trimmed)
}
}
for _, p := range parsed.Parts {
var rawTrimmed string
if p.Type == "thinking" {
rawTrimmed = sse.TrimContinuationOverlapFromBuilder(&s.rawThinking, p.Text)
} else {
rawTrimmed = sse.TrimContinuationOverlapFromBuilder(&s.rawText, p.Text)
}
if rawTrimmed == "" {
continue
}
if p.Type == "thinking" {
s.rawThinking.WriteString(rawTrimmed)
} else {
s.rawText.WriteString(rawTrimmed)
}
cleanedText := cleanVisibleOutput(rawTrimmed, s.stripReferenceMarkers)
if cleanedText == "" {
continue
}
if p.Type != "thinking" && s.searchEnabled && sse.IsCitation(cleanedText) {
continue
}
contentSeen = true
if p.Type == "thinking" {
if !s.thinkingEnabled {
continue
}
trimmed := sse.TrimContinuationOverlapFromBuilder(&s.thinking, cleanedText)
if trimmed == "" {
continue
}
s.thinking.WriteString(trimmed)
s.closeTextBlock()
if !s.thinkingBlockOpen {
s.thinkingBlockIndex = s.nextBlockIndex
s.nextBlockIndex++
s.send("content_block_start", map[string]any{
"type": "content_block_start",
"index": s.thinkingBlockIndex,
"content_block": map[string]any{
"type": "thinking",
"thinking": "",
},
})
s.thinkingBlockOpen = true
}
s.send("content_block_delta", map[string]any{
"type": "content_block_delta",
"index": s.thinkingBlockIndex,
"delta": map[string]any{
"type": "thinking_delta",
"thinking": trimmed,
},
})
continue
}
s.text.WriteString(cleanedText)
if !s.bufferToolContent {
s.closeThinkingBlock()
if !s.textBlockOpen {
s.textBlockIndex = s.nextBlockIndex
s.nextBlockIndex++
s.send("content_block_start", map[string]any{
"type": "content_block_start",
"index": s.textBlockIndex,
"content_block": map[string]any{
"type": "text",
"text": "",
},
})
s.textBlockOpen = true
}
s.send("content_block_delta", map[string]any{
"type": "content_block_delta",
"index": s.textBlockIndex,
"delta": map[string]any{
"type": "text_delta",
"text": cleanedText,
},
})
s.textEmitted = true
continue
}
events := toolstream.ProcessChunk(&s.sieve, rawTrimmed, s.toolNames)
for _, evt := range events {
if len(evt.ToolCalls) > 0 {
s.closeTextBlock()
s.toolCallsDetected = true
normalized := toolcall.NormalizeParsedToolCallsForSchemas(evt.ToolCalls, s.toolsRaw)
for _, tc := range normalized {
idx := s.nextBlockIndex
s.nextBlockIndex++
s.sendToolUseBlock(idx, tc)
}
continue
}
if evt.Content == "" {
continue
}
cleaned := cleanVisibleOutput(evt.Content, s.stripReferenceMarkers)
if cleaned == "" || (s.searchEnabled && sse.IsCitation(cleaned)) {
continue
}
s.closeThinkingBlock()
if !s.textBlockOpen {
s.textBlockIndex = s.nextBlockIndex
s.nextBlockIndex++
s.send("content_block_start", map[string]any{
"type": "content_block_start",
"index": s.textBlockIndex,
"content_block": map[string]any{
"type": "text",
"text": "",
},
})
s.textBlockOpen = true
}
s.send("content_block_delta", map[string]any{
"type": "content_block_delta",
"index": s.textBlockIndex,
"delta": map[string]any{
"type": "text_delta",
"text": cleaned,
},
})
s.textEmitted = true
}
}
if s.history != nil {
s.history.Progress(
responsehistory.ThinkingForArchive(s.rawThinking.String(), s.toolDetectionThinking.String(), s.thinking.String()),
responsehistory.TextForArchive(s.rawText.String(), s.text.String()),
)
}
return streamengine.ParsedDecision{ContentSeen: contentSeen}
}
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