请问下如何接受图片消息,下载或者读取图片

[notomatoes]

接受的图片消息是下面的格式，要怎么保存或者读取图片呢

{
    "data": [
        {
            "BytesExtra": "Cxxxxxxxxxxxxxxxxxxxxx===",
            "BytesTrans": "",
            "CompressContent": "",
            "CreateTime": "1706664281",
            "DisplayContent": "",
            "FlagEx": "0",
            "IsSender": "0",
            "MsgSequence": "8xxxxxxx8",
            "MsgServerSeq": "1",
            "MsgSvrID": "11xxxxxxxxxxxxxx5",
            "Reserved0": "0",
            "Reserved1": "2",
            "Reserved2": "",
            "Reserved3": "",
            "Reserved4": "",
            "Reserved5": "",
            "Reserved6": "",
            "Sequence": "1xxxxxxxxxxxx00",
            "Status": "4",
            "StatusEx": "0",
            "StrContent":"<?xml version=\"1.0\"?>\n<msg>\n\t< img aeskey=\"74af4xxxxxxxxx50\" encryver=\"1\" cdnthumbaeskey=\"74afxxxxxxx0\" cdnthumburl=\"3057xxxxxx0\" cdnthumblength=\"5278\"  
.........

BytesExtra 用base64解析之后是这样的内容

������� ��<msgsource>
    <bizflag>0</bizflag>
    <pua>1</pua>
    <sec_msg_node>
        <uuid>d6a3xxxxxxxxxxxxxxx85_</uuid>
        <alnode>
            <fr>1</fr>
        </alnode>
    </sec_msg_node>
    <signature>V1xxxxxxxxxxxxC</signature>
    <tmp_node>
        <publisher-id />
    </tmp_node>
</msgsource>
�$��� dcb2xxxxxx691�R���Nwxid_xxxxxxxxxxxx2\FileStorage\Cache\2024-01\fcbxxxxxxxxxx996f

这个cache路径也没有文件
FileStorage\Cache\2024-01\fcbxxxxxxxxxx996f

[atorber]

参考 https://www.yuque.com/atorber/chatflow/faqdoi2t36lskgv8

[geekyzk]

@atorber 您好，想咨询一下现在都是缩略图，怎么能得到大图？ 好像只有人工点击后，才有，能默认就有么？

[atorber]

暂时不能