C++实现获取邮件中的附件

#include <iostream>
#include <gmime/gmime.h>
using namespace std;
 
void test()
{
    int i = 0;
    sleep(10);
    printf("666666666666666666666666666666666\n");
    while (i <= 10)
    {
        i++;
        GMimeStream *stream;
        GMimeParser *parser;
        GMimeMessage *message;
        GMimePart *part;
        GMimeDataWrapper *wrapper;
        const char *filename;
        // 从文件中创建一个 GMimeStream
        stream = g_mime_stream_file_new(fopen("/usr/local/zbs_test/eml/测试001.eml", "r"));
        // 创建一个新的 GMimeParser
        parser = g_mime_parser_new_with_stream(stream);
        // 从邮件中解析消息
        message = g_mime_parser_construct_message(parser, NULL);
        GMimePartIter *iter = g_mime_part_iter_new((GMimeObject *)message);
 
        while (g_mime_part_iter_next(iter))
        {
            string path = "/usr/local/zbs_test/target/";
            GMimeObject *current = g_mime_part_iter_get_current(iter);
            GMimeObject *parent = g_mime_part_iter_get_parent(iter);
            if (GMIME_IS_MULTIPART(parent) && GMIME_IS_PART(current))
            {
                GMimePart *part = (GMimePart *)current;
                if (g_mime_part_is_attachment(part))
                {
                    // 获取附件的文件名
                    filename = g_mime_part_get_filename(part);
                    path = path + to_string(i) +filename;
                    printf("名字：%s \n", path.c_str());
                    // 保存附件到文件
                    if (filename)
                    {
                        wrapper = g_mime_part_get_content(part);
                        GMimeStream *save_stream = g_mime_stream_file_new(fopen(path.c_str(), "w"));
                        g_mime_data_wrapper_write_to_stream(wrapper, save_stream);
                        g_object_unref(save_stream);
                    }
                }
            }
        }
 
        // 释放资源
        g_mime_part_iter_free (iter);
        g_object_unref(GMIME_OBJECT(message));
        g_object_unref(parser);
        g_object_unref(stream);
        sleep(3);
    }
    printf("-------------------------------------结束 \n");
    sleep(5);
}
 
int main()
{
    g_mime_init();
    printf("------------------开始\n");
    test();
    g_mime_shutdown();
    return 0;
}