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140 lines
4.8 KiB
140 lines
4.8 KiB
package migu
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import (
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"encoding/json"
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"net/http"
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"runtime/debug"
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"yunyan/lego/sys/log"
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"yunyan/sys/migu"
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)
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// ===================== 普通聊天接口的请求 / 响应结构 =====================
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type (
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// ChatRequest 聊天请求体
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ChatRequest struct {
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Message string `json:"message"` // 本次问话(必填)
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History []Message `json:"history,omitempty"` // 历史对话(可选)
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DeviceId string `json:"deviceId,omitempty"` // 设备ID(可选,亦可用 X-Device-Id 头)
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SessionId string `json:"sessionId,omitempty"` // 会话ID(可选,亦可用 X-Session-Id 头)
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Stream bool `json:"stream"` // 是否流式
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}
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Message struct {
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Role string `json:"role"` // user / assistant / system
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Content string `json:"content"` // 文本内容
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}
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// ChatChunk 流式单帧;只填充当前帧命中的字段
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ChatChunk struct {
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Reasoning string `json:"reasoning,omitempty"` // 模型思考增量
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Content string `json:"content,omitempty"` // 文本增量
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Card *migu.Content `json:"card,omitempty"` // 结构化卡片(音乐等,含 type+data)
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RecommendPrompts []string `json:"recommendPrompts,omitempty"` // 追问提示词
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FinishReason string `json:"finishReason,omitempty"` // 结束原因:空=未结束/正常;fail/filter
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}
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// ChatResponse 非流式完整响应(把整段对话聚合为一个结构化结果)
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ChatResponse struct {
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ReqId string `json:"reqId"`
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SessionId string `json:"sessionId"`
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Reasoning string `json:"reasoning,omitempty"` // 拼接后的完整思考
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Content string `json:"content"` // 拼接后的完整文本
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Cards []migu.Content `json:"cards,omitempty"` // 全部结构化卡片(音乐等)
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RecommendPrompts []string `json:"recommendPrompts,omitempty"` // 全部追问提示词
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FinishReason string `json:"finishReason"` // 结束原因
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}
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)
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// convertChunk 把一条咪咕 StreamResp 转换为 ChatChunk;无可用内容返回 nil。
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func convertChunk(sr *migu.StreamResp) *ChatChunk {
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if sr == nil || len(sr.Choices) == 0 {
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return nil
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}
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c := sr.Choices[0]
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chunk := &ChatChunk{FinishReason: c.FinishReason}
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hit := c.FinishReason != ""
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// 模型思考
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if c.Delta.ReasoningContent != nil && c.Delta.ReasoningContent.Text != "" {
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chunk.Reasoning = c.Delta.ReasoningContent.Text
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hit = true
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}
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// 文本 / 结构化卡片
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if c.Delta.Content != nil {
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switch c.Delta.Content.Type {
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case migu.ContentTypeText:
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var td migu.TextData
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if err := json.Unmarshal(c.Delta.Content.Data, &td); err == nil && td.Text != "" {
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chunk.Content = td.Text
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hit = true
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}
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case migu.ContentTypeH5, migu.ContentTypeTemplate:
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// 结构化卡片(H5/模板,音乐等)原样透传 type+data
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chunk.Card = c.Delta.Content
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hit = true
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}
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}
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// 追问提示词
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for _, p := range c.Delta.RecommendPrompts {
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if p.Text != "" {
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chunk.RecommendPrompts = append(chunk.RecommendPrompts, p.Text)
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}
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}
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if len(chunk.RecommendPrompts) > 0 {
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hit = true
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}
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if !hit {
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return nil
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}
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return chunk
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}
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// ===================== HTTP 中间件 =====================
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func withRecover(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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defer func() {
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if err := recover(); err != nil {
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log.Errorf("migu panic recovered in %s %s: %v", r.Method, r.URL.Path, err)
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if stack := debug.Stack(); len(stack) > 0 {
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log.Errorf("stack trace: %s", string(stack))
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}
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusInternalServerError)
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_, _ = w.Write([]byte(`{"error":"internal server error"}`))
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}
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}()
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next.ServeHTTP(w, r)
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})
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}
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func withCORS(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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origin := r.Header.Get("Origin")
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if origin != "" {
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w.Header().Set("Access-Control-Allow-Origin", origin)
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} else {
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w.Header().Set("Access-Control-Allow-Origin", "*")
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}
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w.Header().Set("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
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w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization, X-Device-Id, X-Session-Id")
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w.Header().Set("Access-Control-Allow-Credentials", "true")
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if r.Method == http.MethodOptions {
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w.WriteHeader(http.StatusOK)
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return
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}
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next.ServeHTTP(w, r)
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})
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}
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// writeError 以统一 JSON 格式返回错误
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func writeError(w http.ResponseWriter, status int, message string) {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(status)
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_ = json.NewEncoder(w).Encode(map[string]string{"error": message})
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}
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