143 lines
3.9 KiB
C
143 lines
3.9 KiB
C
/**
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* @copyright
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*
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* Tencent is pleased to support the open source community by making IoT Hub available.
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* Copyright(C) 2018 - 2021 THL A29 Limited, a Tencent company.All rights reserved.
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*
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* Licensed under the MIT License(the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://opensource.org/licenses/MIT
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*
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* Unless required by applicable law or agreed to in writing, software distributed under the License is
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* distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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* either express or implied. See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @file utils_downloader.c
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* @brief
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* @author fancyxu (fancyxu@tencent.com)
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* @version 1.0
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* @date 2021-10-18
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*
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* @par Change Log:
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* <table>
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* <tr><th>Date <th>Version <th>Author <th>Description
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* <tr><td>2021-10-18 <td>1.0 <td>fancyxu <td>first commit
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* </table>
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*/
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#include "utils_downloader.h"
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/**
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* @brief Downloader.
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*
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*/
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typedef struct {
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UtilsDownloaderFunction func;
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void* usr_data;
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} UtilsDownloader;
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/**
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* @brief Init downloader.
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*
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* @param[in] func download function should implement
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* @param[in] usr_data user data using in function
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* @return pointer to downloader
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*/
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void* utils_downloader_init(UtilsDownloaderFunction func, void* usr_data)
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{
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if (!func.downloader_malloc) {
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return NULL;
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}
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UtilsDownloader* handle = func.downloader_malloc(sizeof(UtilsDownloader));
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if (!handle) {
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return NULL;
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}
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handle->func = func;
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handle->usr_data = usr_data;
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return handle;
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}
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/**
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* @brief Process download using function.
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*
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* @param[in,out] handle pointer to downloader
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* @return -1 for fail, others see data_download_finish
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*/
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int utils_downloader_process(void* handle)
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{
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int rc = -1;
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UtilsDownloader* downloader = handle;
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UtilsDownloaderStatus status = UTILS_DOWNLOADER_STATUS_SUCCESS;
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if (!handle) {
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return -1;
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}
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rc = downloader->func.break_point_init(downloader->usr_data);
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if (rc) {
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status = UTILS_DOWNLOADER_STATUS_BREAK_POINT_FAILED;
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goto exit;
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}
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// if check ok, restore from break point, otherwise set break point
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rc = downloader->func.break_point_check(downloader->usr_data)
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? downloader->func.break_point_set(downloader->usr_data)
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: downloader->func.break_point_restore(downloader->usr_data);
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if (rc) {
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status = UTILS_DOWNLOADER_STATUS_BREAK_POINT_FAILED;
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goto exit;
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}
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rc = downloader->func.data_download_init(downloader->usr_data);
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if (rc) {
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status = UTILS_DOWNLOADER_STATUS_DATA_DOWNLOAD_FAILED;
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goto exit;
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}
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while (!downloader->func.data_download_is_over(downloader->usr_data)) {
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rc = downloader->func.data_download_recv(downloader->usr_data);
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if (rc < 0) {
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status = UTILS_DOWNLOADER_STATUS_NETWORK_FAILED;
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goto exit;
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}
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rc = downloader->func.data_download_save(downloader->usr_data);
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if (rc) {
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status = UTILS_DOWNLOADER_STATUS_DATA_DOWNLOAD_FAILED;
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goto exit;
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}
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rc = downloader->func.break_point_save(downloader->usr_data);
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if (rc) {
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status = UTILS_DOWNLOADER_STATUS_BREAK_POINT_FAILED;
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goto exit;
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}
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}
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exit:
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rc = downloader->func.data_download_finish(downloader->usr_data, status);
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downloader->func.break_point_deinit(downloader->usr_data);
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downloader->func.data_download_deinit(downloader->usr_data);
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return rc;
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}
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/**
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* @brief Deinit downloader.
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*
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* @param[in,out] handle pointer to downloader
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*/
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void utils_downloader_deinit(void* handle)
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{
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UtilsDownloader* downloader = handle;
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if (!handle) {
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return;
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}
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downloader->func.downloader_free(handle);
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}
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