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Merge pull request #23 from kotify/py312
Cleanup weasyprint
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,3 @@ | ||
| /build | ||
| /cdk.out | ||
| /weasyprint/aws-lambda-rie/ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,48 +1,113 @@ | ||
| #!/usr/bin/env python | ||
| import subprocess | ||
| import logging | ||
| import base64 | ||
| import os | ||
|
|
||
| import urllib.request | ||
| from functools import partial | ||
| import tempfile | ||
| from weasyprint import CSS, HTML | ||
| import pathlib | ||
| from urllib.parse import urlparse | ||
| import concurrent.futures | ||
| import boto3 | ||
| import uuid | ||
|
|
||
| logger = logging.getLogger(__name__) | ||
| s3 = boto3.client("s3") | ||
|
|
||
|
|
||
| def gen_pdf_name(tmpdir): | ||
| return tmpdir / f"{uuid.uuid4()}.pdf" | ||
|
|
||
|
|
||
| def download(tmpdir, url): | ||
| name = gen_pdf_name(tmpdir) | ||
| urllib.request.urlretrieve(url, name) | ||
| return name | ||
|
|
||
|
|
||
| def fetch_attachments(downloader, pdfs): | ||
| if not pdfs: | ||
| return [] | ||
|
|
||
| with concurrent.futures.ThreadPoolExecutor( | ||
| max_workers=min(len(pdfs), 6) | ||
| ) as executor: | ||
| return list(executor.map(downloader, pdfs)) | ||
|
|
||
|
|
||
| def postprocess(tmpdir, document, attachments): | ||
| pdfs = fetch_attachments(partial(download, tmpdir), attachments) | ||
| tmpfile = gen_pdf_name(tmpdir) | ||
| subprocess.check_call( | ||
| [ | ||
| "gs", | ||
| "-q", | ||
| "-sDEVICE=pdfwrite", | ||
| "-dPDFSETTINGS=/prepress", | ||
| "-dFIXEDMEDIA", | ||
| "-sPAPERSIZE=a4", | ||
| "-dPDFFitPage", | ||
| "-dAutoRotatePages=/PageByPage", | ||
| "-o", | ||
| f"{tmpfile}", | ||
| document, | ||
| *pdfs, | ||
| ] | ||
| ) | ||
| return tmpfile | ||
|
|
||
|
|
||
| def lambda_handler(event, context): | ||
| filename = event["filename"] | ||
| attachments = [ | ||
| a | ||
| for a in event.get("attachments", []) | ||
| if urlparse(a).path.lower().endswith(".pdf") | ||
| ] | ||
| always_postprocess = event.get("always_postprocess", False) | ||
| return_base64 = event.get("return") == "base64" | ||
| basename = os.path.basename(filename) | ||
| tmpfile = f"/tmp/{basename}" | ||
| if "url" in event: | ||
| HTML(url=event["url"]).write_pdf(target=tmpfile) | ||
| else: | ||
| HTML(string=event["html"]).write_pdf( | ||
| target=tmpfile, | ||
| stylesheets=[CSS(string=event["css"])] if "css" in event else None, | ||
| ) | ||
| if event.get("return") == "base64": | ||
| with open(tmpfile, "rb") as f: | ||
| data = f.read() | ||
| return { | ||
| "statusCode": 200, | ||
| "headers": { | ||
| "Content-type": "application/pdf", | ||
| "Content-Disposition": f"attachment;filename={basename}", | ||
| }, | ||
| "isBase64Encoded": True, | ||
| "body": base64.b64encode(data).decode("utf-8"), | ||
| } | ||
| else: | ||
| import boto3 | ||
|
|
||
| s3 = boto3.client("s3") | ||
| bucket = os.environ["BUCKET"] | ||
| with open(tmpfile, "rb") as f: | ||
| s3.upload_fileobj( | ||
| open(tmpfile, "rb"), | ||
| bucket, | ||
| filename, | ||
| ExtraArgs={"ContentType": "application/pdf"}, | ||
|
|
||
| with tempfile.TemporaryDirectory() as tmpdir: | ||
| tmpdir = pathlib.Path(tmpdir) | ||
| document = gen_pdf_name(tmpdir) | ||
| if "url" in event: | ||
| HTML(url=event["url"]).write_pdf(target=document) | ||
| else: | ||
| HTML(string=event["html"]).write_pdf( | ||
| target=document, | ||
| stylesheets=[CSS(string=event["css"])] if "css" in event else None, | ||
| ) | ||
|
|
||
| if attachments or always_postprocess: | ||
| document = postprocess(tmpdir, document, attachments) | ||
| if return_base64: | ||
| with open(document, "rb") as f: | ||
| data = f.read() | ||
| return { | ||
| "statusCode": 200, | ||
| "headers": { | ||
| "Content-type": "application/pdf", | ||
| "Content-Disposition": f"attachment;filename={basename}", | ||
| }, | ||
| "isBase64Encoded": True, | ||
| "body": base64.b64encode(data).decode("utf-8"), | ||
| } | ||
| else: | ||
| bucket = os.environ["BUCKET"] | ||
| with open(document, "rb") as f: | ||
| s3.upload_fileobj( | ||
| f, | ||
| bucket, | ||
| filename, | ||
| ExtraArgs={"ContentType": "application/pdf"}, | ||
| ) | ||
| url = s3.generate_presigned_url( | ||
| ClientMethod="get_object", | ||
| Params={"Bucket": bucket, "Key": filename}, | ||
| ExpiresIn=3600, | ||
| ) | ||
| url = s3.generate_presigned_url( | ||
| ClientMethod="get_object", | ||
| Params={"Bucket": bucket, "Key": filename}, | ||
| ExpiresIn=3600, | ||
| ) | ||
| return {"statusCode": 200, "body": url} | ||
| return {"statusCode": 200, "body": url} |