An account used for persistent image processing must have read permission for the bucket containing the original image and write permission for the target bucket where the image will be transferred.

When saving processed images to a designated storage bucket as an anonymous user, the bucket must be configured with public write permissions.

The bucket containing the original image and the target bucket for image transfer must be located in the same region.

The default access permission for transferred images is set to private, and the default storage type is standard storage.

Sample Code

The following code demonstrates how to scale an image to a height of 100px and then save the processed image to the target storage bucket with the specified object name.

​
TOSCredential *credential = [[TOSCredential alloc] initWithAccessKey:@"accesskey" secretKey:@"secretkey" securityToken:@"securityToken"];​
TOSEndpoint *tosEndpoint = [[TOSEndpoint alloc] initWithURLString:@"endpoint" withRegion:@"region"];​
TOSClientConfiguration *config = [[TOSClientConfiguration alloc] initWithEndpoint:tosEndpoint credential:credential];​
TOSClient *client = [[TOSClient alloc] initWithConfiguration:config];​
​
TOSGetObjectInput *get = [TOSGetObjectInput new];​
get.tosBucket = @"bucket-name";​
get.tosKey = @"image-name";​
get.tosProcess = @"image/resize,h_100";​
get.tosProcessSaveAsBucket = @"target-bucket-name";​
get.tosProcessSaveAsObject = @"target-image-name";​
TOSTask *task = [client getObject:get];​
[task continueWithBlock:^id _Nullable(TOSTask * _Nonnull t) {​
    if (!task.error) {​
        NSLog(@"Get object to file success.");​
     ​
        TOSGetObjectOutput *out = t.result;​
        NSLog(@"%@", [[NSString alloc] initWithData:out.tosContent encoding:NSUTF8StringEncoding]);​
    } else {​
        NSLog(@"Get object to file failed, error: %@" ,task.error);​
    }​
    return nil;​
}];​

Relevant Documentation

For a detailed introduction to image processing persistence, see Image Processing Persistence.

Last updated: 2025.09.25 16:40:50

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