Image Thumbs

一个简单易用的库，用于从某些（云）对象存储或从磁盘上的图像创建缩略图。

目前实现了与Google Cloud Storage的连接，但可以轻松扩展到其他提供商。

支持的格式

目前只支持PNG和JPEG图像格式。

如何使用

大小

在.yaml文件中配置您想要的缩略图

thumbs:
  - name: standard      # This name will be added to the thumbnail with an underscore (_)
    # Optional; The default pattern is /{image_stem}_{thumb_name}
    # The original extension is always appended to the end, e.g., `.png`
    naming_pattern: "/{thumb_name}/{image_stem}"
    quality: 80         # PNG ignores this variable as it is always lossless
    size: [ 640, 480 ]  # Target size of the thumbnail. May not always be exact.
    mode: fit           # Available are: 'fit' and 'crop'

  - name: mini
    quality: 80
    size: [ 40, 40 ]
    mode: crop

Google凭证

此crate依赖于object_store与存储后端的交互。目前，此crate仅支持Google Cloud Storage。

要配置Google服务帐户，请使用以下环境变量之一，如object_store crate中所述。

GOOGLE_SERVICE_ACCOUNT: location of service account file
GOOGLE_SERVICE_ACCOUNT_PATH: (alias) location of service account file
SERVICE_ACCOUNT: (alias) location of service account file
GOOGLE_SERVICE_ACCOUNT_KEY: JSON serialized service account key
GOOGLE_BUCKET: bucket name
GOOGLE_BUCKET_NAME: (alias) bucket name

然后在您的代码中使用它

#[tokio::main]
async fn main() {
    // Path to your thumbnail configuration yaml. You may specify the .yaml extension in the path, but you don't need to.
    let thumbs = image_thumbs::ImageThumbs::new("examples/image_thumbs")
        .await
        .unwrap();
    thumbs
        .create_thumbs("penguin.jpg", "/thumbs", false)  // do not override existing images
        .await
        .unwrap();
    thumbs
        .create_thumbs("penguin.png", "/thumbs", true)  // do override existing images
        .await
        .unwrap();
}