feat: get header from sendRequestRaw (#694)

* feat: get header from sendRequestRaw

* Fix ci lint

client.go

@@ -38,6 +38,12 @@ func (h *httpHeader) GetRateLimitHeaders() RateLimitHeaders {
 	return newRateLimitHeaders(h.Header())
 }
 
+type RawResponse struct {
+	io.ReadCloser
+
+	httpHeader
+}
+
 // NewClient creates new OpenAI API client.
 func NewClient(authToken string) *Client {
 	config := DefaultConfig(authToken)
@@ -134,8 +140,8 @@ func (c *Client) sendRequest(req *http.Request, v Response) error {
 	return decodeResponse(res.Body, v)
 }
 
-func (c *Client) sendRequestRaw(req *http.Request) (body io.ReadCloser, err error) {
-	resp, err := c.config.HTTPClient.Do(req)
+func (c *Client) sendRequestRaw(req *http.Request) (response RawResponse, err error) {
+	resp, err := c.config.HTTPClient.Do(req) //nolint:bodyclose // body should be closed by outer function
 	if err != nil {
 		return
 	}
@@ -144,7 +150,10 @@ func (c *Client) sendRequestRaw(req *http.Request) (body io.ReadCloser, err erro
 		err = c.handleErrorResp(resp)
 		return
 	}
-	return resp.Body, nil
+
+	response.SetHeader(resp.Header)
+	response.ReadCloser = resp.Body
+	return
 }
 
 func sendRequestStream[T streamable](client *Client, req *http.Request) (*streamReader[T], error) {

files.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"context"
 	"fmt"
-	"io"
 	"net/http"
 	"os"
 )
@@ -159,13 +158,12 @@ func (c *Client) GetFile(ctx context.Context, fileID string) (file File, err err
 	return
 }
 
-func (c *Client) GetFileContent(ctx context.Context, fileID string) (content io.ReadCloser, err error) {
+func (c *Client) GetFileContent(ctx context.Context, fileID string) (content RawResponse, err error) {
 	urlSuffix := fmt.Sprintf("/files/%s/content", fileID)
 	req, err := c.newRequest(ctx, http.MethodGet, c.fullURL(urlSuffix))
 	if err != nil {
 		return
 	}
 
-	content, err = c.sendRequestRaw(req)
-	return
+	return c.sendRequestRaw(req)
 }

speech.go

@@ -3,7 +3,6 @@ package openai
 import (
 	"context"
 	"errors"
-	"io"
 	"net/http"
 )
 
@@ -67,7 +66,7 @@ func isValidVoice(voice SpeechVoice) bool {
 	return contains([]SpeechVoice{VoiceAlloy, VoiceEcho, VoiceFable, VoiceOnyx, VoiceNova, VoiceShimmer}, voice)
 }
 
-func (c *Client) CreateSpeech(ctx context.Context, request CreateSpeechRequest) (response io.ReadCloser, err error) {
+func (c *Client) CreateSpeech(ctx context.Context, request CreateSpeechRequest) (response RawResponse, err error) {
 	if !isValidSpeechModel(request.Model) {
 		err = ErrInvalidSpeechModel
 		return
@@ -84,7 +83,5 @@ func (c *Client) CreateSpeech(ctx context.Context, request CreateSpeechRequest)
 		return
 	}
 
-	response, err = c.sendRequestRaw(req)
-
-	return
+	return c.sendRequestRaw(req)
 }