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fix(gemini-web): recover generated images on Gemini 3

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Gemini 3 stopped emitting the legacy `image_generation_content` marker in
the candidate text and moved the generated image into a later response
part. The `wants_generated` gate only checked the candidate text / a single
structured field, so on Gemini 3 it was never true and the image was
silently dropped: generate_content returned an empty result even though the
gg-dl image URL was present in the raw response.

- Broaden `wants_generated` to also fire when the raw response contains a
  `gg-dl/` generated-image URL or an `image_generation_content` marker.
- When a candidate has no image part, skip extraction instead of throwing
  ImageGenerationError, so multi-candidate responses don't fail wholesale.

Verified against a live Gemini 3 account: image generation returns the
generated image again with the default gemini-3-pro model.
This commit is contained in:
jiji262
2026-06-20 11:37:12 +08:00
parent f490f7e5e3
commit 661bdd08ff
1 changed files with 8 additions and 8 deletions
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skills/baoyu-danger-gemini-web/scripts/gemini-webapi/client.ts
+8 -8
View File
@@ -456,19 +456,19 @@ export class GeminiClient extends GemMixin {
const generated_images: GeneratedImage[] = [];
const wants_generated =
get_nested_value(candidate, [12, 7, 0], null) != null ||
/http:\/\/googleusercontent\.com\/image_generation_content\/\d+/.test(text);
/http:\/\/googleusercontent\.com\/image_generation_content\/\d+/.test(text) ||
// Gemini 3 no longer emits the legacy marker in the candidate text; the generated
// image arrives in a later response part. Detect it from the raw response instead.
/\/gg-dl\//.test(txt) ||
/image_generation_content\/\d+/.test(txt);
if (wants_generated) {
const image_part = find_generated_image_part(response_json as unknown[], body_index, candidate_index, 1);
const img_body = image_part?.body ?? null;
if (!img_body) {
throw new ImageGenerationError(
'Failed to parse generated images. Please update gemini_webapi to the latest version. If the error persists and is caused by the package, please report it on GitHub.',
);
}
const img_candidate = get_nested_value<unknown[]>(img_body, [4, candidate_index], []);
// Not every candidate carries a generated image (e.g. multi-candidate responses).
// If this candidate has no image part, skip extraction instead of failing the whole call.
const img_candidate = img_body ? get_nested_value<unknown[]>(img_body, [4, candidate_index], []) : [];
const finished = get_nested_value<string | null>(img_candidate, [1, 0], null);
if (finished) {
text = finished.replace(/http:\/\/googleusercontent\.com\/image_generation_content\/\d+/g, '').trimEnd();