使用OpenReview API下载投稿补充材料遇404错误如何解决？

问题背景 #

作为OpenReview某会场程序主席，已通过API成功下载所有投稿PDF，但尝试下载补充材料时触发404 NotFound错误。

已成功的PDF下载代码 #

pip install openreview-py

import openreview

# API V2
client = openreview.api.OpenReviewClient(
    baseurl='https://api2.openreview.net',
    username='[redacted]',
    password='[redacted]'
)

notes = client.get_all_notes(invitation = "Your/Venue/ID/-/Submission")
for note in notes:
    if(note.content.get("pdf")):
        f = client.get_attachment(note.id,'pdf')
        with open(f'paper{note.number}.pdf','wb') as op: 
            op.write(f)

补充材料下载代码（触发错误） #

for note in notes:
    if(note.content.get("supplementary_material")):
        f = client.get_attachment(note.id,'supplementary_material')
        with open(f'paper{note.number}_supplementary_material.zip','wb') as op: 
            op.write(f)

会场补充材料字段配置 #

{
    "supplementary_material": {
        "value": {
            "param": {
                "type": "file",
                "extensions": [
                    "zip",
                    "pdf"
                ],
                "maxSize": 100,
                "optional": true,
                "deletable": true
            }
        },
        "description": "All supplementary material must be self-contained and zipped into a single file. Note that supplementary material will be visible to reviewers throughout and after the review period, and ensure all material is anonymized. The maximum file size is 100MB.",
        "order": 7,
        "readers": [
            "confname/2024/Industry_Track",
            "confname/2024/Industry_Track/Submission${4/number}/Area_Chairs",
            "confname/2024/Industry_Track/Submission${4/number}/Reviewers",
            "confname/2024/Industry_Track/Submission${4/number}/Authors"
        ]
    }
}

错误日志 #

C:\Users\dernoncourt\anaconda3\envs\openreview\python.exe C:\Users\dernoncourt\openreview\get_all_pdfs.py 
Traceback (most recent call last):
  File "C:\Users\dernoncourt\openreview\Lib\site-packages\openreview\api\client.py", line 141, in __handle_response
    response.raise_for_status()
  File "C:\Users\dernoncourt\openreview\Lib\site-packages\requests\models.py", line 1021, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 404 Client Error: Not Found for url: https://api2.openreview.net/attachment?id=[redacted]&name=supplementary_material

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\dernoncourt\openreview\get_all_pdfs.py", line 26, in <module>
    f = client.get_attachment(note.id, 'supplementary_material')
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\dernoncourt\openreview\Lib\site-packages\openreview\api\client.py", line 609, in get_attachment
    response = self.__handle_response(response)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\dernoncourt\openreview\Lib\site-packages\openreview\api\client.py", line 156, in __handle_response
    raise OpenReviewException(error)
openreview.openreview.OpenReviewException: {'name': 'NotFoundError', 'message': 'The Supplementary Material file was not found (2024-07-19-3654726)', 'status': 404, 'details': {'path': 'note.content.supplementary_material', 'reqId': '2024-07-19-3654726'}}

Process finished with exit code 1

解决方案 #

1. 修正附件存在性判断逻辑 #

note.content.get("supplementary_material")可能返回空占位字典（仅包含字段定义但无实际文件），需检查是否存在有效附件ID：

for note in notes:
    suppl_material = note.content.get("supplementary_material")
    # 验证附件是否实际上传
    if suppl_material and isinstance(suppl_material, dict) and suppl_material.get("id"):
        try:
            f = client.get_attachment(note.id, 'supplementary_material')
            # 根据实际文件类型保存，避免强制使用zip后缀
            file_ext = suppl_material.get("filename", "").split(".")[-1] if suppl_material.get("filename") else "zip"
            with open(f'paper{note.number}_supplementary_material.{file_ext}','wb') as op: 
                op.write(f)
        except openreview.OpenReviewException as e:
            print(f"Paper {note.number}: Failed to download supplementary material - {e}")

2. 确认账号权限 #

尽管你是程序主席，需确保你的账号所属组在supplementary_material的readers列表中：

• 登录OpenReview控制台，进入对应投稿详情页
• 查看supplementary_material字段的权限设置
• 若程序主席组未在readers内，添加confname/2024/Industry_Track/Program_Chairs到列表中

3. 拉取最新投稿数据 #

之前的notes对象可能为缓存数据，需重新获取最新投稿信息：

# 重新调用API获取最新的投稿列表
notes = client.get_all_notes(invitation = "Your/Venue/ID/-/Submission")

4. 验证文件是否存在 #

错误提示文件未找到，可能作者上传后删除了补充材料：

• 通过OpenReview网页端打开对应投稿
• 检查补充材料是否仍存在

内容的提问来源于stack exchange，提问作者Franck Dernoncourt