使用 boto，在 s3 上已存在的文件上设置 content_type

发布于 2025-01-04 14:32:59 字数 701 浏览 3 评论 0 原文

我正在使用 django 存储和 s3boto 后端。根据此问题， http://code.larlet.fr/django-storages/issue/5/s3botostorage-set-content-type-header-acl-fixed-use-http-and-disable-query-auth- by 我有一堆文件（全部），其内容类型为“application/octet-stream”。鉴于我有一个实例，如何设置 content_type？

In [29]: a.file.file.key.content_type
Out[29]: 'application/octet-stream'

In [30]: mimetypes.guess_type(a.file.file.key.name)[0]
Out[30]: 'image/jpeg'

In [31]: type(a.file.file.key)
Out[31]: <class 'boto.s3.key.Key'>

原文

I'm using django storages with the s3boto backend. As per this issue, http://code.larlet.fr/django-storages/issue/5/s3botostorage-set-content-type-header-acl-fixed-use-http-and-disable-query-auth-by I have a bunch of files (all of them) that have content type 'application/octet-stream'. Given that I have an instance of <class 'boto.s3.key.Key'>, how can I set the content_type?

In [29]: a.file.file.key.content_type
Out[29]: 'application/octet-stream'

In [30]: mimetypes.guess_type(a.file.file.key.name)[0]
Out[30]: 'image/jpeg'

In [31]: type(a.file.file.key)
Out[31]: <class 'boto.s3.key.Key'>

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地狱即天堂 2025-01-11 14:32:59

创建文件后，无法修改与该文件关联的内容类型（或任何其他元数据）。但是，您可以在服务器端复制文件并在此过程中修改元数据。以下是 github 上的要点，应该会有所帮助：

https://gist.github.com/1791086

内容：

import boto

s3 = boto.connect_s3()
bucket = s3.lookup('mybucket')
key = bucket.lookup('mykey')

# Copy the key onto itself, preserving the ACL but changing the content-type
key.copy(key.bucket, key.name, preserve_acl=True,
    metadata={'Content-Type': 'text/plain'})

key = bucket.lookup('mykey')
print key.content_type

米奇

There is no way to modify the content type (or any other metadata) associated with a file after it has been created. You can, however, copy the file on the server side and modify the metadata in the process. Here is a gist on github that should help:

https://gist.github.com/1791086

Contents:

import boto

s3 = boto.connect_s3()
bucket = s3.lookup('mybucket')
key = bucket.lookup('mykey')

# Copy the key onto itself, preserving the ACL but changing the content-type
key.copy(key.bucket, key.name, preserve_acl=True,
    metadata={'Content-Type': 'text/plain'})

key = bucket.lookup('mykey')
print key.content_type

Mitch

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