This topic describes how to use simple upload.

Upload data from memory

The following code provides an example on how to upload data from memory:

#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";
/* The AccessKey pair of an Alibaba Cloud account has permissions on all API operations. Using these credentials to perform operations in OSS is a high-risk operation. We recommend that you use a RAM user to call API operations or perform routine O&M. To create a RAM user, log on to the RAM console. */
const char *access_key_id = "yourAccessKeyId";
const char *access_key_secret = "yourAccessKeySecret";
/* Specify the bucket name. Example: examplebucket. */
const char *bucket_name = "examplebucket";
/* Specify the full path of the object. The full path of the object cannot contain the bucket name. Example: exampledir/exampleobject.txt. */
const char *object_name = "exampledir/exampleobject.txt";
const char *object_content = "More than just cloud.";
void init_options(oss_request_options_t *options)
{
    options->config = oss_config_create(options->pool);
    /* Use a char* string to initialize the aos_string_t data type. */
    aos_str_set(&options->config->endpoint, endpoint);
    aos_str_set(&options->config->access_key_id, access_key_id);
    aos_str_set(&options->config->access_key_secret, access_key_secret);
    /* 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 aos_http_io_initialize in main() to initialize global resources such as networks and memory. */
    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);
    /* Determine 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;
}

Upload a local file

The following code provides an example on how to upload a local file to OSS:

#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";
/* The AccessKey pair of an Alibaba Cloud account has permissions on all API operations. Using these credentials to perform operations in OSS is a high-risk operation. We recommend that you use a RAM user to call API operations or perform routine O&M. To create a RAM user, log on to the RAM console. */
const char *access_key_id = "yourAccessKeyId";
const char *access_key_secret = "yourAccessKeySecret";
/* Specify the bucket name. Example: examplebucket. */
const char *bucket_name = "examplebucket";
/* Specify the full path of the object. The full path of the object cannot contain the bucket name. Example: exampledir/exampleobject.txt. */
const char *object_name = "exampledir/exampleobject.txt";
/* Specify the full path of the local file. */
const char *local_filename = "yourLocalFilename";
void init_options(oss_request_options_t *options)
{
    options->config = oss_config_create(options->pool);
    /* Use a char* string to initialize the aos_string_t data type. */
    aos_str_set(&options->config->endpoint, endpoint);
    aos_str_set(&options->config->access_key_id, access_key_id);
    aos_str_set(&options->config->access_key_secret, access_key_secret);
    /* 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 aos_http_io_initialize in main() to initialize global resources such as networks and memory. */
    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);
    /* Determine 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;
}

FAQ: How can I upload objects whose names contain Chinese characters?

On Windows systems, you can use UTF-8 to encode the object names that contain Chinese characters and upload the objects. The following code provides an example on how to upload an object whose name contains Chinese characters:
#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";
/* The AccessKey pair of an Alibaba Cloud account has permissions on all API operations. Using these credentials to perform operations in OSS is a high-risk operation. We recommend that you use a RAM user to call API operations or perform routine O&M. To create a RAM user, log on to the RAM console. */
const char *access_key_id = "yourAccessKeyId";
const char *access_key_secret = "yourAccessKeySecret";
/* Specify the bucket name. Example: examplebucket. */
const char *bucket_name = "examplebucket";
/* Specify the full path of the object. The full path of the object cannot contain the bucket name. 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";
void init_options(oss_request_options_t *options)
{
  options->config = oss_config_create(options->pool);
  /* Use a char* string to initialize the aos_string_t data type. */
  aos_str_set(&options->config->endpoint, endpoint);
  aos_str_set(&options->config->access_key_id, access_key_id);
  aos_str_set(&options->config->access_key_secret, access_key_secret);
  /* 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 aos_http_io_initialize in main() to initialize global resources such as networks and memory. */
  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);
  /* Determine 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;
}

References

  • For the complete sample code that is used to perform simple upload, visit GitHub.
  • For more information about the API operation that you can call to perform simple upload, see PutObject.