build_client.get_artifact_content_zip() raises "The user '' is not authorized

I opened the issue originally at https://developercommunity.visualstudio.com/content/problem/917755/get-artifact-content-zip-always-returns-authorizat.html

I got "TF400813: The user '' is not authorized to access this resource.", when using build_client.get_artifact_content_zip()

I did find that I can only reproduce it on certain artifacts, not all of them. My suspicion is that for artifacts whose downloadUrl points to some other host, the credential doesn't transfer correctly.

Here's the code:

import argparse
import pathlib
import sys
import tempfile
import zipfile

import azure.devops.connection as azdo_connection
import msrest

# NOTE, please run this with python >= 3.6, in venv that has these reqs:
# * azure-devops~=5.1.0b3
# * msrest~=0.6.9


def parser():
    parser = argparse.ArgumentParser(description="Download artifact")
    parser.add_argument(
        "--url", required=True, help="Example: https://dev.azure.com/MY_ORGANIZATION"
    )
    parser.add_argument("--access-token", required=True, help="Access token to use.")
    parser.add_argument("--project", required=True, help="Azdo project.")
    parser.add_argument("--build-id", required=True, help="Current build id.")
    parser.add_argument("--artifact-name", required=True, help="Artifact name.")
    parser.add_argument(
        "--output-dir", default=".", type=pathlib.Path, help="Artifact name."
    )
    return parser


def main(argv=None):
    if argv is None:
        argv = sys.argv
    args = parser().parse_args(argv[1:])

    credentials = msrest.authentication.BasicAuthentication("", args.access_token)
    connection = azdo_connection.Connection(base_url=args.url, creds=credentials)
    build_client = connection.clients_v5_1.get_build_client()
    artifact_info = build_client.get_artifact(
        args.project, args.build_id, args.artifact_name
    )
    print(f"Artifact info: {artifact_info}")
    with tempfile.TemporaryFile() as f:
        for i in build_client.get_artifact_content_zip(
            args.project, args.build_id, args.artifact_name
        ):
            f.write(i)
        f.seek(0)
        zf = zipfile.ZipFile(f)
        outdir = args.output_dir
        outdir.mkdir(parents=True, exist_ok=True)
        zf.extractall(path=outdir)


if __name__ == "__main__":
    sys.exit(main())

A workaround I found is to apply this patch:

@@ -40,9 +42,18 @@ def main(argv=None):
     )
     print(f"Artifact info: {artifact_info}")
     with tempfile.TemporaryFile() as f:
-        for i in build_client.get_artifact_content_zip(
-            args.project, args.build_id, args.artifact_name
-        ):
+        try:
+            stream = build_client.get_artifact_content_zip(
+                args.project, args.build_id, args.artifact_name
+            )
+        except AzureDevOpsServiceError as e:
+            if "The user '' is not authorized to access this resource" in e.message:
+                stream = requests.get(
+                    artifact_info.resource.download_url, auth=("", args.access_token)
+                )
+            else:
+                raise
+        for i in stream:
             f.write(i)
         f.seek(0)
         zf = zipfile.ZipFile(f)

Comienza con la reproducción de Python proporcionada y el punto de entrada build_client.get_artifact_content_zip(). Compara su comportamiento de autenticación con artifact_info.resource.download_url para artefactos alojados en otro dominio, utilizando el error de autorización reportado como señal de fallo. Se considera terminado cuando las descargas de ZIP de artefactos funcionan tanto para URLs de descarga en el mismo host como para URLs de descarga externas, sin requerir la solución alternativa del llamador.