X-Git-Url: http://git.giacomolli.uk/onechat/blobdiff_plain/7b5d616eaddaee5fa8f73dea9a6593b27c06248e..9b1705c5647864ef482078e1e169d6dfeade98b6:/responses.go

diff --git a/responses.go b/responses.go
index f887e6d..9d6b75f 100644
--- a/responses.go
+++ b/responses.go
@@ -10,12 +10,19 @@ import (
 	"io"
 	"net/http"
 	"os"
+	"path/filepath"
 	"strings"
 	"sync"
 	"time"
 )
 
 const (
+	// chatgptURL is the Responses endpoint of the ChatGPT backend.
+	chatgptURL = "https://chatgpt.com/backend-api/codex/responses"
+
+	// apiURL is the Responses endpoint of the OpenAI API.
+	apiURL = "https://api.openai.com/v1/responses"
+
 	// quotaPrefix starts the names of the quota headers of the ChatGPT
 	// backend, in canonical form.
 	quotaPrefix = "X-Codex-"
@@ -145,6 +152,23 @@ type outputItem struct {
 	} `json:"content"`
 }
 
+// modelEndpoint returns the URL and the authorizer of the endpoint in config.
+// The ChatGPT backend uses the token file in dir. The OpenAI API uses the key in
+// OPENAI_API_KEY, and there is no fallback from one to the other. All clients
+// share the authorizer, so one refresh runs at a time.
+func modelEndpoint(config Config, dir string) (string, authorizer, error) {
+	if config.Endpoint == endpointAPI {
+		key := os.Getenv("OPENAI_API_KEY")
+		if key == "" {
+			return "", nil, errors.New("endpoint api needs OPENAI_API_KEY")
+		}
+
+		return apiURL, apiKey(key), nil
+	}
+
+	return chatgptURL, newChatGPTAuth(filepath.Join(dir, tokenFileName), authIssuer), nil
+}
+
 // newClient returns a client for the Responses endpoint at url. It records
 // each call in the usage file at usagePath.
 func newClient(url string, auth authorizer, cacheKey, usagePath string) *Client {