Limiting Upload Speed (SDK for C)

#include "eSDKOBS.h"
#include <stdio.h>
// The response callback function. The content of properties in the callback can be recorded in callback_data (custom callback data).
obs_status response_properties_callback(const obs_response_properties *properties, void *callback_data);
void put_buffer_complete_callback(obs_status status, const obs_error_details *error, void *callback_data);
typedef struct put_buffer_object_callback_data
{
    char *put_buffer;
    uint64_t buffer_size;
    uint64_t cur_offset;
    obs_status ret_status;
} put_buffer_object_callback_data;
int put_buffer_data_callback(int buffer_size, char *buffer, void *callback_data);
char* generate_upload_buffer(uint64_t buffer_size);
int main()
{
    // The following code shows how to use put_object to upload an object in the stream:
    // Call the obs_initialize method at the program entry to initialize global resources such as the network and memory.
    obs_initialize(OBS_INIT_ALL); 
    obs_options options;
    // Create and initialize options, including the access domain name (host_name), access keys (access_key_id and access_key_secret), bucket name (bucket_name), and bucket storage class (storage_class).
    init_obs_options(&options);
    // Enter the endpoint corresponding to the bucket for host_name. CN-Hong Kong is used here as an example. Replace it with the one currently in use.
    options.bucket_options.host_name = "obs.ap-southeast-1.myhuaweicloud.com";
    // Hard-coded or plaintext AK and SK are risky. For security purposes, encrypt your AK and SK and store them in the configuration file or environment variables.
    // In this example, the AK and SK are stored in environment variables for identity authentication. Before running the code in this example, configure local environment variables ACCESS_KEY_ID and SECRET_ACCESS_KEY.
    options.bucket_options.access_key = getenv("ACCESS_KEY_ID");
    options.bucket_options.secret_access_key = getenv("SECRET_ACCESS_KEY");
    // Specify the bucket name, for example, example-bucket-name.
    char * bucketName = "example-bucket-name";
    options.bucket_options.bucket_name = bucketName;
    // Initialize the properties of the object to be uploaded.
    obs_put_properties put_properties;
    init_put_properties(&put_properties);
    // Set the speed limit to 100 KB/s (819200 bit/s).
    put_properties.upload_limit = 819200;
    // Initialize the structure for storing the uploaded data.
    put_buffer_object_callback_data data;
    memset(&data, 0, sizeof(put_buffer_object_callback_data));
    // Set the buffer size.
    data.buffer_size = 10 * 1024 * 1024;
    // Create a simulated data buffer for the streaming upload and assign the value to the data upload structure.
    data.put_buffer = generate_upload_buffer(data.buffer_size);
    if (NULL == data.put_buffer) {
        printf("generate put buffer failed. \n");
        return -1;
    }
    // Name of the object to be uploaded
    char *key = "example_put_buffer_test.txt";
    obs_put_object_handler putobjectHandler =
    {
        { &response_properties_callback, &put_buffer_complete_callback },
          &put_buffer_data_callback
    };
    put_object(&options, key, data.buffer_size, &put_properties, 0, &putobjectHandler, &data);
    if (OBS_STATUS_OK == data.ret_status) {
        printf("put object from buffer successfully. \n");
    }
    else
    {
        printf("put object from buffer failed(%s).\n",
            obs_get_status_name(data.ret_status));
    }
    // Release the buffer.
    free(data.put_buffer);
    // Release the allocated global resources.
    obs_deinitialize();
    return 0;    
}
// The response callback function. The content of properties in the callback can be recorded in callback_data (custom callback data).
obs_status response_properties_callback(const obs_response_properties *properties, void *callback_data)
{
    if (properties == NULL)
    {
        printf("error! obs_response_properties is null!");
        if (callback_data != NULL)
        {
            obs_sever_callback_data *data = (obs_sever_callback_data *)callback_data;
            printf("server_callback buf is %s, len is %llu",
                data->buffer, data->buffer_len);
            return OBS_STATUS_OK;
        }
        else {
            printf("error! obs_sever_callback_data is null!");
            return OBS_STATUS_OK;
        }
    }
    // Print the response.
#define print_nonnull(name, field)                                 \
    do {                                                           \
        if (properties-> field) {                                  \
            printf("%s: %s\n", name, properties->field);          \
        }                                                          \
    } while (0)
    print_nonnull("request_id", request_id);
    print_nonnull("request_id2", request_id2);
    print_nonnull("content_type", content_type);
    if (properties->content_length) {
        printf("content_length: %llu\n", properties->content_length);
    }
    print_nonnull("server", server);
    print_nonnull("ETag", etag);
    print_nonnull("expiration", expiration);
    print_nonnull("website_redirect_location", website_redirect_location);
    print_nonnull("version_id", version_id);
    print_nonnull("allow_origin", allow_origin);
    print_nonnull("allow_headers", allow_headers);
    print_nonnull("max_age", max_age);
    print_nonnull("allow_methods", allow_methods);
    print_nonnull("expose_headers", expose_headers);
    print_nonnull("storage_class", storage_class);
    print_nonnull("server_side_encryption", server_side_encryption);
    print_nonnull("kms_key_id", kms_key_id);
    print_nonnull("customer_algorithm", customer_algorithm);
    print_nonnull("customer_key_md5", customer_key_md5);
    print_nonnull("bucket_location", bucket_location);
    print_nonnull("obs_version", obs_version);
    print_nonnull("restore", restore);
    print_nonnull("obs_object_type", obs_object_type);
    print_nonnull("obs_next_append_position", obs_next_append_position);
    print_nonnull("obs_head_epid", obs_head_epid);
    print_nonnull("reserved_indicator", reserved_indicator);
    int i;
    for (i = 0; i < properties->meta_data_count; i++) {
        printf("x-obs-meta-%s: %s\n", properties->meta_data[i].name,
            properties->meta_data[i].value);
    }
    return OBS_STATUS_OK;
}
void put_buffer_complete_callback(obs_status status, const obs_error_details *error, void *callback_data)
{
    if (callback_data) {
        put_buffer_object_callback_data *data = (put_buffer_object_callback_data *)callback_data;
        data->ret_status = status;
    }
    else {
        printf("Callback_data is NULL");
    }
    if (error && error->message) {
        printf("Error Message: \n   %s\n", error->message);
    }
    if (error && error->resource) {
        printf("Error Resource: \n  %s\n", error->resource);
    }
    if (error && error->further_details) {
        printf("Error further_details: \n   %s\n", error->further_details);
    }
    if (error && error->extra_details_count) {
        int i;
        for (i = 0; i < error->extra_details_count; i++) {
            printf("Error Extra Detail(%d):\n   %s:%s\n", i, error->extra_details[i].name,
                error->extra_details[i].value);
        }
    }
    if (error && error->error_headers_count) {
        int i;
        for (i = 0; i < error->error_headers_count; i++) {
            const char *errorHeader = error->error_headers[i];
            printf("Error Headers(%d):\n    %s\n", i, errorHeader == NULL ? "NULL Header" : errorHeader);
        }
    }
}
int put_buffer_data_callback(int buffer_size, char *buffer, void *callback_data)
{
    put_buffer_object_callback_data *data =
        (put_buffer_object_callback_data *)callback_data;
    int toRead = 0;
    if (data->buffer_size) {
        toRead = ((data->buffer_size > (unsigned)buffer_size) ?
            (unsigned)buffer_size : data->buffer_size);
        memcpy_s(buffer, buffer_size, data->put_buffer + data->cur_offset, toRead);
    }
    uint64_t originalContentLength = data->buffer_size;
    data->buffer_size -= toRead;
    data->cur_offset += toRead;
    if (data->buffer_size) {
        printf("%llu bytes remaining ", (unsigned long long)data->buffer_size);
        printf("(%d%% complete) ...\n",
            (int)(((originalContentLength - data->buffer_size) * 100) / originalContentLength));
    }
    return toRead;
}
// Create a simulated streaming upload buffer.
char* generate_upload_buffer(uint64_t buffer_size) {
    void* upload_buffer = NULL;
    if (buffer_size > 0) {
        upload_buffer = malloc(buffer_size);
        if (upload_buffer != NULL) {
            memset(upload_buffer, 't', buffer_size);
        }
    }
    return upload_buffer;
}