Ensure deterministic endpoint sorting and broaden call fallback on space errors

gr2gw.go

@@ -18,6 +18,7 @@ import (
   "net/url"
   "os"
   "regexp"
+  "sort"
   "strconv"
   "strings"
   "sync"
@@ -1207,14 +1208,14 @@ func extractGradioErrorMessage(dataStr string) string {
 
 func isProtocolOrInputError(errMsg string) bool {
   lower := strings.ToLower(errMsg)
-  return strings.Contains(lower, "check gradio inputs/types") ||
-    strings.Contains(lower, "null error") ||
-    strings.Contains(lower, "typeerror") ||
-    strings.Contains(lower, "missing") ||
-    strings.Contains(lower, "required positional argument") ||
-    strings.Contains(lower, "internal server error") ||
-    strings.Contains(lower, "not found") ||
-    strings.Contains(lower, "unknown upstream gradio error")
+  if strings.Contains(lower, "unauthorized") ||
+    strings.Contains(lower, "forbidden") ||
+    strings.Contains(lower, "quota exceeded") ||
+    strings.Contains(lower, "payment required") ||
+    strings.Contains(lower, "rate limit") {
+    return false
+  }
+  return true
 }
 
 type Streamer struct {
@@ -2195,7 +2196,13 @@ func InspectSpace(client *http.Client, rawURL, userAgent string) (*SpaceDiscover
 
   // Try named endpoints from /gradio_api/info first
   if infoFetched && len(infoResp.NamedEndpoints) > 0 {
-    for epName, epInfo := range infoResp.NamedEndpoints {
+    epNames := make([]string, 0, len(infoResp.NamedEndpoints))
+    for epName := range infoResp.NamedEndpoints {
+      epNames = append(epNames, epName)
+    }
+    sort.Strings(epNames)
+    for _, epName := range epNames {
+      epInfo := infoResp.NamedEndpoints[epName]
       cleanTarget := strings.TrimPrefix(epName, "/")
       var matchingDep *GradioDependency
       if configFetched {
@@ -4200,7 +4207,8 @@ func (g *GradioGateway) ExecuteChatCompletion(w http.ResponseWriter, r *http.Req
     }
 
     if !latestFrame.OK {
-      return fmt.Errorf("upstream Gradio space returned empty or unparseable response")
+      log.Printf("Gradio /call returned empty or unparseable response, falling back to /queue/join protocol...")
+      return g.executeQueueCompletion(w, r, disc, gradioData, req, completionID, createdTime, modelName, effUA)
     }
 
     cleanText := latestFrame.Content
@@ -4444,7 +4452,8 @@ func (g *GradioGateway) ExecuteChatCompletion(w http.ResponseWriter, r *http.Req
   }
 
   if !streamer.started {
-    return fmt.Errorf("upstream Gradio space closed stream without sending content")
+    log.Printf("Gradio /call closed stream without sending content, falling back to /queue/join protocol...")
+    return g.executeQueueCompletion(w, r, disc, gradioData, req, completionID, createdTime, modelName, effUA)
   }
 
   if nativeToolCallsSeen || toolFilter.emittedCall {