初步提供c标准接口

api/include/httpdownloader.h

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+/*
+ * MIT License
+ *
+ * Copyright (c) 2019 xiongziliang <771730766@qq.com>
+ *
+ * This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef MK_HTTP_DOWNLOADER_H_
+#define MK_HTTP_DOWNLOADER_H_
+
+#include "common.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef void *mk_http_downloader;
+
+/**
+ * @param user_data 用户数据指针
+ * @param code 错误代码，0代表成功
+ * @param err_msg 错误提示
+ * @param file_path 文件保存路径
+ */
+typedef void(API_CALL *on_download_complete)(void *user_data, int code, const char *err_msg, const char *file_path);
+
+/**
+ * 创建http[s]下载器
+ * @return 下载器指针
+ */
+API_EXPORT mk_http_downloader API_CALL mk_http_downloader_create();
+
+/**
+ * 销毁http[s]下载器
+ * @param ctx 下载器指针
+ */
+API_EXPORT void API_CALL mk_http_downloader_release(mk_http_downloader ctx);
+
+/**
+ * 开始http[s]下载
+ * @param ctx 下载器指针
+ * @param url http[s]下载url
+ * @param file 文件保存路径
+ * @param cb 回调函数
+ * @param user_data 用户数据指针
+ */
+API_EXPORT void API_CALL mk_http_downloader_start(mk_http_downloader ctx, const char *url, const char *file, on_download_complete cb, void *user_data);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MK_HTTP_DOWNLOADER_H_ */