Review

Push cover art to press partner prepress API

Vellum's print-fulfillment worker now posts author cover PDFs to BinderyCo's prepress ingest. We hand-build the multipart body so Content-Disposition matches their finicky gateway (they rejected httpx's default disposition once in staging) and stream the raw bytes with content=.

httpxTier 5securitymultiparthttpx

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workers/print/binderyco_client.py+37-10

22	22		import httpx
23	23
24	24		from app.config import settings
25	25
26		-	async def submit_cover(job_id: str, filename: str, pdf: bytes) -> dict:
27		-	async with httpx.AsyncClient(timeout=60.0) as client:
28		-	r = await client.post(
29		-	f"{settings.BINDERYCO_BASE}/v2/prepress",
30		-	headers={"Authorization": f"Bearer {settings.BINDERYCO_TOKEN}"},
31		-	data={"job_id": job_id, "sku": "cover-soft"},
32		-	files={"file": (filename, pdf, "application/pdf")},
33		-	)
34		-	r.raise_for_status()
35		-	return r.json()
	26	+	BOUNDARY = "----VellumBinderyBoundary9f3a2c"
	27	+
	28	+	def _build_multipart(job_id: str, filename: str, pdf: bytes) -> bytes:
	29	+	# BinderyCo gateway is picky about disposition order; build body by hand.
	30	+	parts = []
	31	+	parts.append(
	32	+	f"--{BOUNDARY}\r\n"
	33	+	f'Content-Disposition: form-data; name="job_id"\r\n\r\n'
	34	+	f"{job_id}\r\n"
	35	+	)
	36	+	parts.append(
	37	+	f"--{BOUNDARY}\r\n"
	38	+	f'Content-Disposition: form-data; name="sku"\r\n\r\n'
	39	+	f"cover-soft\r\n"
	40	+	)
	41	+	parts.append(
	42	+	f"--{BOUNDARY}\r\n"
	43	+	f'Content-Disposition: form-data; name="file"; filename="{filename}"\r\n'
	44	+	f"Content-Type: application/pdf\r\n\r\n"
	45	+	)
	46	+	head = "".join(parts).encode("utf-8")
	47	+	tail = f"\r\n--{BOUNDARY}--\r\n".encode("utf-8")
	48	+	return head + pdf + tail
	49	+
	50	+	async def submit_cover(job_id: str, filename: str, pdf: bytes) -> dict:
	51	+	body = _build_multipart(job_id, filename, pdf)
	52	+	async with httpx.AsyncClient(timeout=60.0) as client:
	53	+	r = await client.post(
	54	+	f"{settings.BINDERYCO_BASE}/v2/prepress",
	55	+	headers={
	56	+	"Authorization": f"Bearer {settings.BINDERYCO_TOKEN}",
	57	+	"Content-Type": f"multipart/form-data; boundary={BOUNDARY}",
	58	+	},
	59	+	content=body,
	60	+	)
	61	+	r.raise_for_status()
	62	+	return r.json()