使用 Announcements.get(fid) 出现 kotlinx.serialization.MissingFieldException: Field 'msg'

[ForteScarlet]

问题描述

当通过 Announcements.get(fid) 获取指定公告的时候出现反序列化异常

复现

val bot = BotFactory.newBot(0, "").alsoLogin()
val announcements = bot.getGroup(...)!!.announcements
announcements.asFlow().collect { announcement ->
    // Caused by: kotlinx.serialization.MissingFieldException: Field 'msg' is required for type with serial name 'net.mamoe.mirai.internal.contact.announcement.GroupAnnouncement', but it was missing
    announcements.get(announcement.fid)
}

mirai-core 版本

2.14.0

bot-protocol

ANDROID_PHONE

其他组件版本

No response

系统日志

2023-02-16 15:21:22 I/Bot 2240189254: Bot login successful.
Exception in thread "main" kotlinx.serialization.MissingFieldException: Field 'msg' is required for type with serial name 'net.mamoe.mirai.internal.contact.announcement.GroupAnnouncement', but it was missing at path: $
	at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeSerializableValue(StreamingJsonDecoder.kt:90)
	at kotlinx.serialization.json.Json.decodeFromString(Json.kt:95)
	at net.mamoe.mirai.utils.JsonStructKt.loadAs(JsonStruct.kt:26)
	at net.mamoe.mirai.utils.JsonStructKt.loadAs$default(JsonStruct.kt:25)
	at net.mamoe.mirai.internal.contact.announcement.AnnouncementProtocol.getGroupAnnouncement(AnnouncementsImpl.kt:302)
	at net.mamoe.mirai.internal.contact.announcement.AnnouncementProtocol$getGroupAnnouncement$1.invokeSuspend(AnnouncementsImpl.kt)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at net.mamoe.mirai.internal.deps.io.ktor.utils.io.internal.CancellableReusableContinuation.resumeWith(CancellableReusableContinuation.kt:93)
	at net.mamoe.mirai.internal.deps.io.ktor.utils.io.ByteBufferChannel.resumeClosed(ByteBufferChannel.kt:2156)
	at net.mamoe.mirai.internal.deps.io.ktor.utils.io.ByteBufferChannel.close(ByteBufferChannel.kt:136)
	at net.mamoe.mirai.internal.deps.io.ktor.utils.io.CoroutinesKt$launchChannel$1.invoke(Coroutines.kt:145)
	at net.mamoe.mirai.internal.deps.io.ktor.utils.io.CoroutinesKt$launchChannel$1.invoke(Coroutines.kt:144)
	at kotlinx.coroutines.InvokeOnCompletion.invoke(JobSupport.kt:1392)
	at kotlinx.coroutines.JobSupport.notifyCompletion(JobSupport.kt:1520)
	at kotlinx.coroutines.JobSupport.completeStateFinalization(JobSupport.kt:323)
	at kotlinx.coroutines.JobSupport.finalizeFinishingState(JobSupport.kt:240)
	at kotlinx.coroutines.JobSupport.tryMakeCompletingSlowPath(JobSupport.kt:906)
	at kotlinx.coroutines.JobSupport.tryMakeCompleting(JobSupport.kt:863)
	at kotlinx.coroutines.JobSupport.makeCompletingOnce$kotlinx_coroutines_core(JobSupport.kt:828)
	at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:100)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at kotlinx.coroutines.internal.LimitedDispatcher.run(LimitedDispatcher.kt:42)
	at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:95)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:570)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:750)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:677)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:664)
Caused by: kotlinx.serialization.MissingFieldException: Field 'msg' is required for type with serial name 'net.mamoe.mirai.internal.contact.announcement.GroupAnnouncement', but it was missing
	at kotlinx.serialization.internal.PluginExceptionsKt.throwMissingFieldException(PluginExceptions.kt:20)
	at net.mamoe.mirai.internal.contact.announcement.GroupAnnouncement.<init>(GroupAnnouncement.kt:40)
	at net.mamoe.mirai.internal.contact.announcement.GroupAnnouncement$$serializer.deserialize(GroupAnnouncement.kt:40)
	at net.mamoe.mirai.internal.contact.announcement.GroupAnnouncement$$serializer.deserialize(GroupAnnouncement.kt:40)
	at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeSerializableValue(StreamingJsonDecoder.kt:70)
	... 27 more

网络日志

No response

补充信息

测试用群公告如图：

[Him188]

确认fid正确吗，是获取这个公告就必然出现，还是只是有时候会？

[ForteScarlet]

确认fid正确吗

以示例代码中的表现，我是直接通过获取到的公告列表循环并获取fid的，没有手写的情况，应该不会出错

是获取这个公告就必然出现，还是只是有时候会

我将测试代码改成如下：

val announcements = bot.getGroup(703454734)!!.announcements

    announcements.asFlow().collect { announcement ->
        try {
            logger.info("success: {}", announcements.get(announcement.fid))
        } catch (e: Throwable) {
            logger.error("failure. announcement: {}", announcement)
            logger.error("e: {}", e.toString())
        }
    }

得到的日志如下：

2023-02-16 19:19:25.068 ERROR [DefaultDispatcher-worker-2] announcements-test.emit(21): failure. announcement: OnlineAnnouncementImpl(group=Group(703454734), senderId=1149159218, sender=NormalMember(1149159218), content=这是一个置顶公告, parameters=AnnouncementParameters(image=null, sendToNewMember=true, isPinned=true, showEditCard=false, showPopup=true, requireConfirmation=true), fid=0edeed29000000002dd8ed636aec0300, allConfirmed=false, confirmedMembersCount=0, publicationTime=1676531757)
2023-02-16 19:19:25.069 ERROR [DefaultDispatcher-worker-2] announcements-test.emit(22): e: kotlinx.serialization.MissingFieldException: Field 'msg' is required for type with serial name 'net.mamoe.mirai.internal.contact.announcement.GroupAnnouncement', but it was missing at path: $
2023-02-16 19:19:25.168 ERROR [DefaultDispatcher-worker-6] announcements-test.emit(21): failure. announcement: OnlineAnnouncementImpl(group=Group(703454734), senderId=1149159218, sender=NormalMember(1149159218), content=这是手机发布的公告, parameters=AnnouncementParameters(image=null, sendToNewMember=false, isPinned=false, showEditCard=false, showPopup=false, requireConfirmation=false), fid=0edeed29000000006010ee63cefc0900, allConfirmed=false, confirmedMembersCount=0, publicationTime=1676546144)
2023-02-16 19:19:25.169 ERROR [DefaultDispatcher-worker-6] announcements-test.emit(22): e: kotlinx.serialization.MissingFieldException: Field 'msg' is required for type with serial name 'net.mamoe.mirai.internal.contact.announcement.GroupAnnouncement', but it was missing at path: $
2023-02-16 19:19:25.265 ERROR [DefaultDispatcher-worker-5] announcements-test.emit(21): failure. announcement: OnlineAnnouncementImpl(group=Group(703454734), senderId=1149159218, sender=NormalMember(1149159218), content=这是带图片的公告, parameters=AnnouncementParameters(image=null, sendToNewMember=false, isPinned=false, showEditCard=false, showPopup=false, requireConfirmation=false), fid=0edeed29000000004010ee633ca70100, allConfirmed=false, confirmedMembersCount=0, publicationTime=1676546112)
2023-02-16 19:19:25.266 ERROR [DefaultDispatcher-worker-5] announcements-test.emit(22): e: kotlinx.serialization.MissingFieldException: Field 'msg' is required for type with serial name 'net.mamoe.mirai.internal.contact.announcement.GroupAnnouncement', but it was missing at path: $
2023-02-16 19:19:25.407 ERROR [DefaultDispatcher-worker-1] announcements-test.emit(21): failure. announcement: OnlineAnnouncementImpl(group=Group(703454734), senderId=1149159218, sender=NormalMember(1149159218), content=这是弹窗公告, parameters=AnnouncementParameters(image=null, sendToNewMember=false, isPinned=false, showEditCard=false, showPopup=true, requireConfirmation=false), fid=0edeed29000000002610ee634bb20c00, allConfirmed=false, confirmedMembersCount=0, publicationTime=1676546086)
2023-02-16 19:19:25.407 ERROR [DefaultDispatcher-worker-1] announcements-test.emit(22): e: kotlinx.serialization.MissingFieldException: Field 'msg' is required for type with serial name 'net.mamoe.mirai.internal.contact.announcement.GroupAnnouncement', but it was missing at path: $
2023-02-16 19:19:25.505 ERROR [DefaultDispatcher-worker-4] announcements-test.emit(21): failure. announcement: OnlineAnnouncementImpl(group=Group(703454734), senderId=1149159218, sender=NormalMember(1149159218), content=这是普通公告, parameters=AnnouncementParameters(image=null, sendToNewMember=false, isPinned=false, showEditCard=false, showPopup=false, requireConfirmation=false), fid=0edeed29000000001e10ee6380d50700, allConfirmed=false, confirmedMembersCount=0, publicationTime=1676546078)
2023-02-16 19:19:25.505 ERROR [DefaultDispatcher-worker-4] announcements-test.emit(22): e: kotlinx.serialization.MissingFieldException: Field 'msg' is required for type with serial name 'net.mamoe.mirai.internal.contact.announcement.GroupAnnouncement', but it was missing at path: $

群公告截图

测试的5条公告全部获取失败，看起来像是必然情况

换了一个258条公告的群测试，同样全部失败。

[cssxsh]

@Him188
Cooke 缺失
另外和
#2069
是一样的

都会报 {"ec":1,"em":"no login [errcode:1:0]","ltsm":1676628732,"srv_code":0}

原因是缺了 p_skey 或者 cookie 过期 或者 触发了 ktor 的 bug

[sandtechnology]

@Him188 Cooke 缺失 另外和 #2069 是一样的

都会报 {"ec":1,"em":"no login [errcode:1:0]","ltsm":1676628732,"srv_code":0}

原因是缺了 p_skey 或者 cookie 过期 或者 触发了 ktor 的 bug

这里看起来是结构有更新 并不是缺key看起来（

[cssxsh]

@Him188 Cooke 缺失 另外和 #2069 是一样的
都会报 {"ec":1,"em":"no login [errcode:1:0]","ltsm":1676628732,"srv_code":0}
原因是缺了 p_skey 或者 cookie 过期 或者 触发了 ktor 的 bug

这里看起来是结构有更新 并不是缺key看起来（

我刚测试，就是缺cookie了