feat: 重构ollama渠道请求
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somnifex
165
relay/channel/ollama/stream.go
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165
relay/channel/ollama/stream.go
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package ollama
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import (
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"bufio"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"one-api/common"
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"one-api/dto"
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"one-api/logger"
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relaycommon "one-api/relay/common"
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"one-api/relay/helper"
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"one-api/service"
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"one-api/types"
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"strings"
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"time"
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"github.com/gin-gonic/gin"
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)
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// Ollama streaming chunk (chat or generate)
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type ollamaChatStreamChunk struct {
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Model string `json:"model"`
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CreatedAt string `json:"created_at"`
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// chat
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Message *struct {
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Role string `json:"role"`
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Content string `json:"content"`
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ToolCalls []struct { `json:"tool_calls"`
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Function struct {
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Name string `json:"name"`
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Arguments interface{} `json:"arguments"`
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} `json:"function"`
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} `json:"tool_calls"`
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} `json:"message"`
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// generate
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Response string `json:"response"`
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Done bool `json:"done"`
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DoneReason string `json:"done_reason"`
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TotalDuration int64 `json:"total_duration"`
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LoadDuration int64 `json:"load_duration"`
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PromptEvalCount int `json:"prompt_eval_count"`
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EvalCount int `json:"eval_count"`
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// generate mode may use these
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PromptEvalDuration int64 `json:"prompt_eval_duration"`
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EvalDuration int64 `json:"eval_duration"`
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}
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func toUnix(ts string) int64 { // parse RFC3339 / variant; fallback time.Now
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if ts == "" { return time.Now().Unix() }
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// try time.RFC3339 or with nanoseconds
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t, err := time.Parse(time.RFC3339Nano, ts)
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if err != nil { t2, err2 := time.Parse(time.RFC3339, ts); if err2==nil { return t2.Unix() }; return time.Now().Unix() }
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return t.Unix()
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}
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// streaming handler: convert Ollama stream -> OpenAI SSE
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func ollamaStreamHandler(c *gin.Context, info *relaycommon.RelayInfo, resp *http.Response) (*dto.Usage, *types.NewAPIError) {
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if resp == nil || resp.Body == nil { return nil, types.NewOpenAIError(fmt.Errorf("empty response"), types.ErrorCodeBadResponse, http.StatusBadRequest) }
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defer service.CloseResponseBodyGracefully(resp)
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helper.SetEventStreamHeaders(c)
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scanner := bufio.NewScanner(resp.Body)
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usage := &dto.Usage{}
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var model = info.UpstreamModelName
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var responseId = common.GetUUID()
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var created = time.Now().Unix()
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var aggregatedText strings.Builder
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var toolCallIndex int
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// send start event
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start := helper.GenerateStartEmptyResponse(responseId, created, model, nil)
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if data, err := common.Marshal(start); err == nil { _ = helper.StringData(c, string(data)) }
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for scanner.Scan() {
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line := scanner.Text()
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line = strings.TrimSpace(line)
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if line == "" { continue }
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var chunk ollamaChatStreamChunk
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if err := json.Unmarshal([]byte(line), &chunk); err != nil {
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logger.LogError(c, "ollama stream json decode error: "+err.Error()+" line="+line)
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return usage, types.NewOpenAIError(err, types.ErrorCodeBadResponseBody, http.StatusInternalServerError)
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}
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if chunk.Model != "" { model = chunk.Model }
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created = toUnix(chunk.CreatedAt)
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if !chunk.Done {
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// delta content
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var content string
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if chunk.Message != nil { content = chunk.Message.Content } else { content = chunk.Response }
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if content != "" { aggregatedText.WriteString(content) }
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delta := dto.ChatCompletionsStreamResponse{
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Id: responseId,
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Object: "chat.completion.chunk",
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Created: created,
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Model: model,
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Choices: []dto.ChatCompletionsStreamResponseChoice{ {
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Index: 0,
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Delta: dto.ChatCompletionsStreamResponseChoiceDelta{ Role: "assistant" },
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} },
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}
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if content != "" { delta.Choices[0].Delta.SetContentString(content) }
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// tool calls
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if chunk.Message != nil && len(chunk.Message.ToolCalls) > 0 {
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delta.Choices[0].Delta.ToolCalls = make([]dto.ToolCallResponse,0,len(chunk.Message.ToolCalls))
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for _, tc := range chunk.Message.ToolCalls {
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// arguments -> string
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argBytes, _ := json.Marshal(tc.Function.Arguments)
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tr := dto.ToolCallResponse{ID:"", Type:nil, Function: dto.FunctionResponse{Name: tc.Function.Name, Arguments: string(argBytes)}}
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tr.SetIndex(toolCallIndex)
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toolCallIndex++
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delta.Choices[0].Delta.ToolCalls = append(delta.Choices[0].Delta.ToolCalls, tr)
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}
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}
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if data, err := common.Marshal(delta); err == nil { _ = helper.StringData(c, string(data)) }
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continue
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}
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// done frame
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usage.PromptTokens = chunk.PromptEvalCount
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usage.CompletionTokens = chunk.EvalCount
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usage.TotalTokens = usage.PromptTokens + usage.CompletionTokens
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finishReason := chunk.DoneReason
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if finishReason == "" { finishReason = "stop" }
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stop := helper.GenerateStopResponse(responseId, created, model, finishReason)
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if data, err := common.Marshal(stop); err == nil { _ = helper.StringData(c, string(data)) }
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final := helper.GenerateFinalUsageResponse(responseId, created, model, *usage)
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if data, err := common.Marshal(final); err == nil { _ = helper.StringData(c, string(data)) }
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}
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if err := scanner.Err(); err != nil && err != io.EOF { logger.LogError(c, "ollama stream scan error: "+err.Error()) }
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return usage, nil
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}
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// non-stream handler for chat/generate
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func ollamaChatHandler(c *gin.Context, info *relaycommon.RelayInfo, resp *http.Response) (*dto.Usage, *types.NewAPIError) {
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body, err := io.ReadAll(resp.Body)
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if err != nil { return nil, types.NewOpenAIError(err, types.ErrorCodeReadResponseBodyFailed, http.StatusInternalServerError) }
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service.CloseResponseBodyGracefully(resp)
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if common.DebugEnabled { println("ollama non-stream resp:", string(body)) }
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var chunk ollamaChatStreamChunk
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if err = json.Unmarshal(body, &chunk); err != nil { return nil, types.NewOpenAIError(err, types.ErrorCodeBadResponseBody, http.StatusInternalServerError) }
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model := chunk.Model
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if model == "" { model = info.UpstreamModelName }
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created := toUnix(chunk.CreatedAt)
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content := ""
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if chunk.Message != nil { content = chunk.Message.Content } else { content = chunk.Response }
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usage := &dto.Usage{PromptTokens: chunk.PromptEvalCount, CompletionTokens: chunk.EvalCount, TotalTokens: chunk.PromptEvalCount + chunk.EvalCount}
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// Build OpenAI style response
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full := dto.OpenAITextResponse{
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Id: common.GetUUID(),
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Model: model,
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Object: "chat.completion",
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Created: created,
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Choices: []dto.OpenAITextResponseChoice{ {
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Index: 0,
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Message: dto.Message{Role: "assistant", Content: contentPtr(content)},
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FinishReason: func() string { if chunk.DoneReason == "" { return "stop" } ; return chunk.DoneReason }(),
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} },
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Usage: *usage,
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}
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out, _ := common.Marshal(full)
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service.IOCopyBytesGracefully(c, resp, out)
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return usage, nil
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}
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func contentPtr(s string) *string { if s=="" { return nil }; return &s }
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