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updated code to include streaming

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krishnaduttPanchagnula 2023-05-30 12:59:44 +05:30
parent 1d942080ee
commit 39c9e1f955
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GPG key ID: 2BDACA6646C509E3
1 changed files with 65 additions and 31 deletions
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96
api/openai.go
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@ -157,12 +157,77 @@ func completionEndpoint(cm *ConfigMerger, o *Option) func(c *fiber.Ctx) error {
log.Debug().Msgf("Parameter Config: %+v", config)
if input.Stream {
log.Debug().Msgf("Stream request received")
c.Context().SetContentType("text/event-stream")
//c.Response().Header.SetContentType(fiber.MIMETextHTMLCharsetUTF8)
// c.Set("Content-Type", "text/event-stream")
c.Set("Cache-Control", "no-cache")
c.Set("Connection", "keep-alive")
c.Set("Transfer-Encoding", "chunked")
}
templateFile := config.Model
if config.TemplateConfig.Completion != "" {
templateFile = config.TemplateConfig.Completion
}
if input.Stream {
responses := make(chan OpenAIResponse)
go func() {
defer close(responses)
for _, i := range config.PromptStrings {
// A model can have a "file.bin.tmpl" file associated with a prompt template prefix
templatedInput, err := o.loader.TemplatePrefix(templateFile, struct{ Input string }{Input: i})
if err == nil {
i = templatedInput
log.Debug().Msgf("Template found, input modified to: %s", i)
}
r, err := ComputeChoices(i, input, config, o.loader, nil, nil)
if err != nil {
log.Error().Err(err).Msg("Error computing choices")
continue
}
resp := OpenAIResponse{
Model: input.Model,
Choices: r,
Object: "text_completion",
}
responses <- resp
}
}()
c.Context().SetBodyStreamWriter(fasthttp.StreamWriter(func(w *bufio.Writer) {
for ev := range responses {
var buf bytes.Buffer
enc := json.NewEncoder(&buf)
enc.Encode(ev)
log.Debug().Msgf("Sending chunk: %s", buf.String())
fmt.Fprintf(w, "data: %v\n", buf.String())
w.Flush()
}
resp := &OpenAIResponse{
Model: input.Model, // we have to return what the user sent here, due to OpenAI spec.
Choices: []Choice{{FinishReason: "stop"}},
}
respData, _ := json.Marshal(resp)
w.WriteString(fmt.Sprintf("data: %s\n\n", respData))
w.WriteString("data: [DONE]\n\n")
w.Flush()
}))
return nil
}
var result []Choice
for _, i := range config.PromptStrings {
// A model can have a "file.bin.tmpl" file associated with a prompt template prefix
@ -184,37 +249,6 @@ func completionEndpoint(cm *ConfigMerger, o *Option) func(c *fiber.Ctx) error {
result = append(result, r...)
}
if input.Stream {
responses := make(chan OpenAIResponse)
go func() {
defer close(responses)
for _, r := range result {
responses <- OpenAIResponse{
Model: input.Model,
Choices: []Choice{r},
Object: "text_completion",
}
}
}()
c.Context().SetContentType("text/event-stream")
c.Set("Cache-Control", "no-cache")
c.Set("Connection", "keep-alive")
c.Set("Transfer-Encoding", "chunked")
c.Context().SetBodyStreamWriter(fasthttp.StreamWriter(func(w *bufio.Writer) {
for ev := range responses {
var buf bytes.Buffer
enc := json.NewEncoder(&buf)
enc.Encode(ev)
log.Debug().Msgf("Sending chunk: %s", buf.String())
fmt.Fprintf(w, "data: %v\n", buf.String())
w.Flush()
}
}))
}
resp := &OpenAIResponse{
Model: input.Model, // we have to return what the user sent here, due to OpenAI spec.
Choices: result,