62 lines
1.5 KiB
Go
62 lines
1.5 KiB
Go
package openai
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import (
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"bufio"
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"context"
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"errors"
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"net/http"
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)
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var (
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ErrTooManyEmptyStreamMessages = errors.New("stream has sent too many empty messages")
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)
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type CompletionStream struct {
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*streamReader[CompletionResponse]
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}
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// CreateCompletionStream — API call to create a completion w/ streaming
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// support. It sets whether to stream back partial progress. If set, tokens will be
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// sent as data-only server-sent events as they become available, with the
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// stream terminated by a data: [DONE] message.
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func (c *Client) CreateCompletionStream(
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ctx context.Context,
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request CompletionRequest,
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) (stream *CompletionStream, err error) {
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urlSuffix := "/completions"
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if !checkEndpointSupportsModel(urlSuffix, request.Model) {
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err = ErrCompletionUnsupportedModel
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return
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}
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if !checkPromptType(request.Prompt) {
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err = ErrCompletionRequestPromptTypeNotSupported
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return
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}
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request.Stream = true
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req, err := c.newStreamRequest(ctx, "POST", urlSuffix, request)
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if err != nil {
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return
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}
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resp, err := c.config.HTTPClient.Do(req) //nolint:bodyclose // body is closed in stream.Close()
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if err != nil {
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return
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}
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if resp.StatusCode < http.StatusOK || resp.StatusCode >= http.StatusBadRequest {
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return nil, c.handleErrorResp(resp)
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}
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stream = &CompletionStream{
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streamReader: &streamReader[CompletionResponse]{
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emptyMessagesLimit: c.config.EmptyMessagesLimit,
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reader: bufio.NewReader(resp.Body),
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response: resp,
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errAccumulator: newErrorAccumulator(),
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unmarshaler: &jsonUnmarshaler{},
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},
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}
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return
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}
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