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fix(rsplat): use fal.ai response_url for result fetch, add poll logging 

The result fetch was constructing its own URL instead of using the
response_url returned by fal.ai's status poll. This caused 422 errors.
Now captures response_url from poll and uses it for result retrieval.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Jeff Emmett 2026-03-16 20:51:05 -07:00
parent 97636235bf
commit e5814b12c6
1 changed files with 11 additions and 12 deletions
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23
server/index.ts
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@ -790,6 +790,7 @@ async function process3DGenJob(job: Gen3DJob) {
// 3. Poll for completion (up to 8 min — Hunyuan3D with textures can take 3-5 min)
const deadline = Date.now() + 480_000;
let responseUrl = "";
let completed = false;
while (Date.now() < deadline) {
await new Promise((r) => setTimeout(r, 3000));
@ -798,9 +799,11 @@ async function process3DGenJob(job: Gen3DJob) {
{ headers: falHeaders },
);
if (!statusRes.ok) continue;
const status = await statusRes.json() as { status: string };
if (status.status === "COMPLETED") { completed = true; break; }
if (status.status === "FAILED") {
const statusData = await statusRes.json() as { status: string; response_url?: string };
console.log(`[3d-gen] Poll ${job.id}: status=${statusData.status}`);
if (statusData.response_url) responseUrl = statusData.response_url;
if (statusData.status === "COMPLETED") { completed = true; break; }
if (statusData.status === "FAILED") {
job.status = "failed";
job.error = "3D generation failed on fal.ai";
job.completedAt = Date.now();
@ -814,20 +817,16 @@ async function process3DGenJob(job: Gen3DJob) {
return;
}
// 4. Fetch result (retry once after 3s on transient failure)
let resultRes = await fetch(
`https://queue.fal.run/${MODEL}/requests/${request_id}`,
{ headers: falHeaders },
);
// 4. Fetch result using response_url from status (with fallback)
const resultUrl = responseUrl || `https://queue.fal.run/${MODEL}/requests/${request_id}`;
console.log(`[3d-gen] Fetching result from: ${resultUrl}`);
let resultRes = await fetch(resultUrl, { headers: falHeaders });
if (!resultRes.ok) {
console.warn(`[3d-gen] Result fetch failed (status=${resultRes.status}), retrying in 3s...`);
const errBody = await resultRes.text().catch(() => "");
console.warn(`[3d-gen] Result error body:`, errBody);
await new Promise((r) => setTimeout(r, 3000));
resultRes = await fetch(
`https://queue.fal.run/${MODEL}/requests/${request_id}`,
{ headers: falHeaders },
);
resultRes = await fetch(resultUrl, { headers: falHeaders });
}
if (!resultRes.ok) {
const errBody = await resultRes.text().catch(() => "");