Overview

This document provides an overview of APIs and SDK code samples related to Image Advanced Compression.

Method prototype

Image compression is implemented via object download. All you need to do is adding the request parameters in the following syntax:

c
imageMogr2/format/<Format>

Sample request

c
cos_pool_t *p = NULL;
int is_cname = 0; 
cos_status_t *s = NULL;
cos_request_options_t *options = NULL;
cos_string_t bucket;
cos_string_t object;
cos_string_t file;
cos_table_t *resp_headers;
cos_table_t *params = NULL;
cos_pool_create(&p, NULL);
options = cos_request_options_create(p);
options->config = cos_config_create(options->pool);
cos_str_set(&options->config->endpoint, TEST_COS_ENDPOINT);
cos_str_set(&options->config->access_key_id, TEST_ACCESS_KEY_ID);
cos_str_set(&options->config->access_key_secret, TEST_ACCESS_KEY_SECRET);
cos_str_set(&options->config->appid, TEST_APPID);
options->config->is_cname = is_cname;
options->ctl = cos_http_controller_create(options->pool, 0);
cos_str_set(&bucket, TEST_BUCKET_NAME);
params = cos_table_make(p, 1);
apr_table_addn(params, "imageMogr2/format/tpg", "");
cos_str_set(&object, "test.jpg");
cos_str_set(&file, "test.tpg");
s = cos_get_object_to_file(options, &bucket, &object, NULL, params, &file, &resp_headers);
log_status(s);
if (!cos_status_is_ok(s)) {
 printf("cos_get_object_to_file fail, req_id:%s\n", s->req_id);
}
params = cos_table_make(p, 1);
apr_table_addn(params, "imageMogr2/format/heif", "");
cos_str_set(&file, "test.heif");
s = cos_get_object_to_file(options, &bucket, &object, NULL, params, &file, &resp_headers);
log_status(s);
if (!cos_status_is_ok(s)) {
 printf("cos_get_object_to_file fail, req_id:%s\n", s->req_id);
}