[Mobilar] 05 - Multiple Users: using AWS S3 for file uploads

Ref: Python Django Tutorial: Full-Featured Web App Part 13 - Using AWS S3 for File Uploads

Ref: https://django-storages.readthedocs.io/en/latest/

$ pip install django-storages

django-storages is a collection of custom storage backends for Django.

提供了多种云存储方案：

• Amazon S3
• Apache Libcloud
• Azure Storage
• Digital Ocean
• Dropbox
• FTP
• Google Cloud Storage
• SFTP

 

 

一、创建 S3 Bucket

(1) 视频中版本，未用到。

<?xml version="1.0" encoding="UTF-8"?>
<CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
  <CORSRule>
    <AllowedOrigin>*</AllowedOrigin>
    <AllowedMethod>GET</AllowedMethod>
    <AllowedMethod>POST</AllowedMethod>
    <AllowedMethod>PUT</AllowedMethod>
    <AllowedHeader>*</AllowedHeader>
  </CORSRule>
</CORSConfiguration>

 

(2) 这是json 版本，有用到。

[
    {
        "AllowedHeaders": [
            "*"
        ],
        "AllowedMethods": [
            "PUT",
            "POST",
            "DELETE"
        ],
        "AllowedOrigins": [
            "*"
        ],
        "ExposeHeaders": []
    }
]

 

 

二、创建 IAM Role

创建一个具有S3操作的policy和role。

文件 settings.py

EMAIL_HOST_USER = os.environ.get('EMAIL_USER')
EMAIL_HOST_PASSWORD = os.environ.get('EMAIL_PASS')

AWS_ACCESS_KEY_ID = os.environ.get('AWS_ACCESS_KEY_ID')
AWS_SECRET_ACCESS_KEY = os.environ.get('AWS_SECRET_ACCESS_KEY')
AWS_STORAGE_BUCKET_NAME = os.environ.get('AWS_STORAGE_BUCKET_NAME')

这里就可以注销掉，放弃本地保存的方式。

class Profile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    image = models.ImageField(default='default.jpg', upload_to='profile_pics')

    def __str__(self):
        return f'{self.user.username} Profile'

    # def save(self, *args, **kwargs):
    #     super().save(*args, **kwargs)

    #     img = Image.open(self.image.path)

    #     if img.height > 300 or img.width > 300:
    #         output_size = (300, 300)
    #         img.thumbnail(output_size)
    #         img.save(self.image.path)

 

 

三、云端 media 文件夹

把本地的文件夹内容如何重定向到S3上呢？

media/
├── default.jpg
└── profile_pics
    ├── large.jpg
    ├── large_rbSbk8j.jpg
    └── pic.jpg

根据 AWS_STORAGE_BUCKET_NAME，就直接将 media的文件夹内容 “原封不动”的重定向到 S3的bucket上了呢，精简的操作。

 

 Notice: 记得再安装 boto3，以及相关的dependencies。

 

 

四、多用户 Media 隔离

Ref: Storing Django Static and Media Files on Amazon S3

Ref: Learn Django - Implementing AWS S3 Storage for Static and Media files in Django