Object Storage Service:簡易アップロード

使用上の注意

• このトピックでは、中国 (杭州) リージョンのパブリックエンドポイントを使用します。 OSSと同じリージョンにある他のAlibaba CloudサービスからOSSにアクセスする場合は、内部エンドポイントを使用します。 OSSリージョンとエンドポイントの詳細については、「リージョンとエンドポイント」をご参照ください。

• このトピックでは、OSSエンドポイントを使用してOSSClientインスタンスを作成します。 カスタムドメイン名またはSTS (Security Token Service) を使用してOSSClientインスタンスを作成する場合は、「初期化」をご参照ください。

• 簡単なアップロードを実行するには、oss:PutObject権限が必要です。 詳細については、「RAMユーザーへのカスタムポリシーのアタッチ」をご参照ください。

メモリからデータをアップロードする

次のサンプルコードは、メモリからデータをアップロードする方法の例を示しています。

#include "oss_api.h"
#include "aos_http_io.h"
/* Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. */
const char *endpoint = "yourEndpoint";
/* Specify the name of the bucket. Example: examplebucket. */
const char *bucket_name = "examplebucket";
/* Specify the full path of the object. Do not include the bucket name in the full path. Example: exampledir/exampleobject.txt. */
const char *object_name = "exampledir/exampleobject.txt";
const char *object_content = "More than just cloud.";
/* Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. */
const char *region = "yourRegion";
void init_options(oss_request_options_t *options)
{
    options->config = oss_config_create(options->pool);
    /* Use a char* string to initialize data of the aos_string_t type. */
    aos_str_set(&options->config->endpoint, endpoint);
    /* Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. */
    aos_str_set(&options->config->access_key_id, getenv("OSS_ACCESS_KEY_ID"));
    aos_str_set(&options->config->access_key_secret, getenv("OSS_ACCESS_KEY_SECRET"));
    // Specify two additional parameters.
    aos_str_set(&options->config->region, region);
    options->config->signature_version = 4;
    /* Specify whether to use CNAME. The value 0 indicates that CNAME is not used. */
    options->config->is_cname = 0;
    /* Configure network parameters, such as the timeout period. */
    options->ctl = aos_http_controller_create(options->pool, 0);
}
int main(int argc, char *argv[])
{
    /* Call the aos_http_io_initialize method in main() to initialize global resources, such as network resources and memory resources. */
    if (aos_http_io_initialize(NULL, 0) != AOSE_OK) {
        exit(1);
    }
    /* Create a memory pool to manage memory. aos_pool_t is equivalent to apr_pool_t. The code used to create a memory pool is included in the APR library. */
    aos_pool_t *pool;
    /* Create a memory pool. The value of the second parameter is NULL. This value indicates that the pool does not inherit other memory pools. */
    aos_pool_create(&pool, NULL);
    /* Create and initialize options. This parameter includes global configuration information, such as endpoint, access_key_id, access_key_secret, is_cname, and curl. */
    oss_request_options_t *oss_client_options;
    /* Allocate the memory resources in the memory pool to the options. */
    oss_client_options = oss_request_options_create(pool);
    /* Initialize oss_client_options. */
    init_options(oss_client_options);
    /* Initialize the parameters. */
    aos_string_t bucket;
    aos_string_t object;
    aos_list_t buffer;
    aos_buf_t *content = NULL;
    aos_table_t *headers = NULL;
    aos_table_t *resp_headers = NULL; 
    aos_status_t *resp_status = NULL; 
    aos_str_set(&bucket, bucket_name);
    aos_str_set(&object, object_name);
    aos_list_init(&buffer);
    content = aos_buf_pack(oss_client_options->pool, object_content, strlen(object_content));
    aos_list_add_tail(&content->node, &buffer);
    /* Upload the object. */
    resp_status = oss_put_object_from_buffer(oss_client_options, &bucket, &object, &buffer, headers, &resp_headers);
    /* Check whether the object is uploaded. */
    if (aos_status_is_ok(resp_status)) {
        printf("put object from buffer succeeded\n");
    } else {
        printf("put object from buffer failed\n");      
    }
    /* Release the memory pool. This operation releases the memory resources allocated for the request. */
    aos_pool_destroy(pool);
    /* Release the allocated global resources. */
    aos_http_io_deinitialize();
    return 0;
}

ローカルファイルのアップロード

次のサンプルコードは、ローカルファイルをOSSにアップロードする方法の例を示しています。

#include "oss_api.h"
#include "aos_http_io.h"
/* Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. */
const char *endpoint = "yourEndpoint";
/* Specify the name of the bucket. Example: examplebucket. */
const char *bucket_name = "examplebucket";
/* Specify the full path of the object. Do not include the bucket name in the full path. Example: exampledir/exampleobject.txt. */
const char *object_name = "exampledir/exampleobject.txt";
/* Specify the full path of the local file. */
const char *local_filename = "yourLocalFilename";
/* Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. */
const char *region = "yourRegion";
void init_options(oss_request_options_t *options)
{
    options->config = oss_config_create(options->pool);
    /* Use a char* string to initialize data of the aos_string_t type. */
    aos_str_set(&options->config->endpoint, endpoint);
    /* Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. */
    aos_str_set(&options->config->access_key_id, getenv("OSS_ACCESS_KEY_ID"));
    aos_str_set(&options->config->access_key_secret, getenv("OSS_ACCESS_KEY_SECRET"));
    // Specify two additional parameters.
    aos_str_set(&options->config->region, region);
    options->config->signature_version = 4; 
    /* Specify whether to use CNAME. The value 0 indicates that CNAME is not used. */
    options->config->is_cname = 0;
    /* Configure network parameters, such as the timeout period. */
    options->ctl = aos_http_controller_create(options->pool, 0);
}
int main(int argc, char *argv[])
{
    /* Call the aos_http_io_initialize method in main() to initialize global resources, such as network resources and memory resources. */
    if (aos_http_io_initialize(NULL, 0) != AOSE_OK) {
        exit(1);
    }
    /* Create a memory pool to manage memory. aos_pool_t is equivalent to apr_pool_t. The code used to create a memory pool is included in the APR library. */
    aos_pool_t *pool;
    /* Create a memory pool. The value of the second parameter is NULL. This value indicates that the pool does not inherit other memory pools. */
    aos_pool_create(&pool, NULL);
    /* Create and initialize options. This parameter includes global configuration information, such as endpoint, access_key_id, access_key_secret, is_cname, and curl. */
    oss_request_options_t *oss_client_options;
    /* Allocate the memory resources in the memory pool to the options. */
    oss_client_options = oss_request_options_create(pool);
    /* Initialize oss_client_options. */
    init_options(oss_client_options);
    /* Initialize the parameters. */
    aos_string_t bucket;
    aos_string_t object;
    aos_string_t file;
    aos_table_t *headers = NULL;
    aos_table_t *resp_headers = NULL; 
    aos_status_t *resp_status = NULL; 
    aos_str_set(&bucket, bucket_name);
    aos_str_set(&object, object_name);
    aos_str_set(&file, local_filename);
    /* Upload the object. */
    resp_status = oss_put_object_from_file(oss_client_options, &bucket, &object, &file, headers, &resp_headers);
    /* Check whether the object is uploaded. */
    if (aos_status_is_ok(resp_status)) {
        printf("put object from file succeeded\n");
    } else {
        printf("put object from file failed\n");
    }
    /* Release the memory pool. This operation releases the memory resources allocated for the request. */
    aos_pool_destroy(pool);
    /* Release the allocated global resources. */
    aos_http_io_deinitialize();
    return 0;
}

名前に漢字が含まれるオブジェクトをアップロードするにはどうすればよいですか?

#include "oss_api.h"
#include "aos_http_io.h"
#include <wchar.h>
/* Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. */
const char *endpoint = "yourEndpoint";
/* Specify the name of the bucket. Example: examplebucket. */
const char *bucket_name = "examplebucket";
/* Specify the full path of the object. Do not include the bucket name in the full path. Example: exampledir/exampleobject.txt. */
const char *object_name = "exampledir/exampleobject.txt";
/* Specify the full path of the local file. */
const char *local_filename_ch = "yourLocalFilename";
/* Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. */
const char *region = "yourRegion";
void init_options(oss_request_options_t *options)
{
　　options->config = oss_config_create(options->pool);
　　/* Use a char* string to initialize data of the aos_string_t type. */
　　aos_str_set(&options->config->endpoint, endpoint);
　　/* Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. */
　　aos_str_set(&options->config->access_key_id, getenv("OSS_ACCESS_KEY_ID"));
　　aos_str_set(&options->config->access_key_secret, getenv("OSS_ACCESS_KEY_SECRET"));
   // Specify two additional parameters.
   aos_str_set(&options->config->region, region);
   options->config->signature_version = 4; 
　　/* Specify whether to use CNAME. The value 0 indicates that CNAME is not used. */
　　options->config->is_cname = 0;
　　/* Configure network parameters, such as the timeout period. */
　　options->ctl = aos_http_controller_create(options->pool, 0);
}

char* multibyte_to_utf8(const char * ch, char *str, int size)
{
　　if (!ch || !str || size <= 0)
　　    return NULL;

　　int chlen = strlen(ch);
　　int multi_byte_cnt = 0;
　　for (int i = 0; i < chlen - 1; i++) {
        if ((ch[i] & 0x80) && (ch[i + 1] & 0x80)) {
            i++;
            multi_byte_cnt++;
        }
　　}
　　if (multi_byte_cnt == 0)
        return ch;

　　int len = MultiByteToWideChar(CP_ACP, 0, ch, -1, NULL, 0);
　　if (len <= 0)
        return NULL;
　　wchar_t *wch = malloc(sizeof(wchar_t) * (len + 1));
　　if (!wch)
        return NULL;
　　wmemset(wch, 0, len + 1);
　　MultiByteToWideChar(CP_ACP, 0, ch, -1, wch, len);

　　len = WideCharToMultiByte(CP_UTF8, 0, wch, -1, NULL, 0, NULL, NULL);
　　if ((len <= 0) || (size < len + 1)) {
        free(wch);
        return NULL;
　　}
　　memset(str, 0, len + 1);
　　WideCharToMultiByte(CP_UTF8, 0, wch, -1, str, len, NULL, NULL);
　　free(wch);
　　return str;
}

int main(int argc, char argv[])
{
　　/* Call the aos_http_io_initialize method in main() to initialize global resources, such as network resources and memory resources. */
　　if (aos_http_io_initialize(NULL, 0) != AOSE_OK) {
　　    exit(1);
　　}
　　/* Create a memory pool to manage memory. aos_pool_t is equivalent to apr_pool_t. The code used to create a memory pool is included in the APR library. */
　　aos_pool_t pool;
　　/* Create a memory pool. The value of the second parameter is NULL. This value indicates that the pool does not inherit other memory pools. */
　　aos_pool_create(&pool, NULL);
    /* Create and initialize options. This parameter includes global configuration information, such as endpoint, access_key_id, access_key_secret, is_cname, and curl. */
　　oss_request_options_t oss_client_options;
　　/* Allocate the memory resources in the memory pool to the options. */
　　oss_client_options = oss_request_options_create(pool);
　　/* Initialize oss_client_options. */
　　init_options(oss_client_options);
　　/* Initialize the parameters. */
　　aos_string_t bucket;
　　aos_string_t object;
    aos_string_t file;
    aos_table_t *headers = NULL;
    aos_table_t *resp_headers = NULL;
    aos_status_t *resp_status = NULL;
    aos_str_set(&bucket, bucket_name);
    aos_str_set(&object, object_name);

    /* Use UTF-8 to encode the object names that contain multibyte Chinese characters. */
    char local_filename_buf[1024];
　　char * local_filename = multibyte_to_utf8(local_filename_ch, local_filename_buf, 1024);
　　aos_str_set(&file, local_filename);

　　/* Upload the object. */
    resp_status = oss_put_object_from_file(oss_client_options, &bucket, &object, &file, headers, &resp_headers);
　　/* Check whether the object is uploaded. */
　　if (aos_status_is_ok(resp_status)) {
        printf("put object from file succeeded\n");
    } else {
        printf("put object from file failed\n");
　　}
　　/* Release the memory pool. This operation releases the memory resources allocated for the request. */
　　aos_pool_destroy(pool);
　　/* Release the allocated global resources. */
　　aos_http_io_deinitialize();
　　return 0;
}

関連ドキュメント

• 簡単なアップロードの実行に使用する完全なサンプルコードについては、『GitHub』をご参照ください。

• シンプルアップロードを実行するために呼び出すことができるAPI操作の詳細については、「PutObject」をご参照ください。