Using a User-Defined Domain Name to Access OBS
When using a user-defined domain name to access OBS, you can call APIs as you normally do, except that you need to configure option as shown below:
option.bucket_options.useCname = true; option.bucket_options.host_name = "yourCustomDomain";
Using a user-defined domain name to upload an object:
static void test_put_object_from_file() { // Name of the object char *key = "put_file_test"; // File to be uploaded char file_name[256] = "./put_file_test.txt"; uint64_t content_length = 0; // Initialize option. obs_options option; init_obs_options(&option); option.bucket_options.host_name = "<your-endpoint>"; option.bucket_options.bucket_name = "<Your bucketname>"; // Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables ACCESS_KEY_ID and SECRET_ACCESS_KEY. // Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/usermanual-ca/ca_01_0003.html. option.bucket_options.access_key = getenv("ACCESS_KEY_ID"); option.bucket_options.secret_access_key = getenv("SECRET_ACCESS_KEY"); option.bucket_options.certificate_info = "<Your certificate>"; // Specify a user-defined domain name. option.bucket_options.useCname = true; option.bucket_options.host_name = "yourCustomDomain"; // Initialize the properties of the object. obs_put_properties put_properties; init_put_properties(&put_properties); // Initialize the structure for storing data to be uploaded. put_file_object_callback_data data; memset(&data, 0, sizeof(put_file_object_callback_data)); // Open the file and obtain the file length. content_length = open_file_and_get_length(file_name, &data); // Set the callback function. obs_put_object_handler putobjectHandler = { { &response_properties_callback, &put_file_complete_callback }, &put_file_data_callback }; put_object(&option, key, content_length, &put_properties, 0, &putobjectHandler, &data); if (OBS_STATUS_OK == data.ret_status) { printf("put object from file successfully. \n"); } else { printf("put object failed(%s).\n", obs_get_status_name(data.ret_status)); } }
Using a user-defined domain name to download an object:
static void test_get_object() { char *file_name = "./test"; obs_object_info object_info; // Initialize option. obs_options option; init_obs_options(&option); option.bucket_options.host_name = "<your-endpoint>"; option.bucket_options.bucket_name = "<Your bucketname>"; // Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables ACCESS_KEY_ID and SECRET_ACCESS_KEY. // Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/usermanual-ca/ca_01_0003.html. option.bucket_options.access_key = getenv("ACCESS_KEY_ID"); option.bucket_options.secret_access_key = getenv("SECRET_ACCESS_KEY"); // Specify a user-defined domain name. option.bucket_options.useCname = true; option.bucket_options.host_name = "yourCustomDomain"; // Specify the object to be downloaded. memset(&object_info, 0, sizeof(obs_object_info)); object_info.key = "<object key>"; object_info.version_id = "<object version ID>"; //Set the structure for storing downloaded data based on service requirements. get_object_callback_data data; data.ret_status = OBS_STATUS_BUTT; data.outfile = write_to_file(file_name); // Define a range to download. obs_get_conditions getcondition; memset(&getcondition, 0, sizeof(obs_get_conditions)); init_get_properties(&getcondition); getcondition.start_byte = "<start byte>"; // Define a size to download. The default value is 0, indicating that the object is read to the end. getcondition.byte_count = "<byte count>"; // Define a callback function. obs_get_object_handler get_object_handler = { { &response_properties_callback, &get_object_complete_callback}, &get_object_data_callback }; get_object(&option, &object_info, &getcondition, 0, &get_object_handler, &data); if (OBS_STATUS_OK == data.ret_status) { printf("get object successfully. \n"); } else { printf("get object faied(%s).\n", obs_get_status_name(data.ret_status)); } fclose(data.outfile); }
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