如何在 ejabberd 中撤回消息？
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【中文标题】如何在 ejabberd 中撤回消息？【英文标题】：How to retract a message in ejabberd? 【发布时间】：2020-01-22 12:31:17 【问题描述】：我正在创建一个 MUC 客户端，我想在客户端中实现某种消息删除。我读到从 ejabberd 中删除单个消息是不可能的。但是我怎样才能使用XEP-0424 来达到类似的目的呢？我已经阅读、编写并测试了 XEP 中描述的用例，但没有成功。
客户端发送这样的消息：
<message xmlns="jabber:client" to="myroom@conference.localhost" type="groupchat">
<body>9</body>
<urls />
<origin-id xmlns="urn:xmpp:sid:0" id="358f5b60-3d10-11ea-be33-5f58c62bedc3" />
</message>
服务器广播这个：
<message xmlns="jabber:client" to="user1@localhost/1132254315040517635831042" from="myroom@conference.localhost" id="1579690081679918">
<archived xmlns="urn:xmpp:mam:tmp" by="user1@localhost" id="1579690081690608" />
<stanza-id xmlns="urn:xmpp:sid:0" by="user1@localhost" id="1579690081690608" />
<event xmlns="http://jabber.org/protocol/pubsub#event">
<items node="urn:xmpp:mucsub:nodes:messages">
<item id="1579690081679918">
<message xmlns="jabber:client" xml:lang="en" to="user1@localhost" from="myroom@conference.localhost/user1" type="groupchat">
<archived xmlns="urn:xmpp:mam:tmp" by="myroom@conference.localhost" id="1579690081679918" />
<stanza-id xmlns="urn:xmpp:sid:0" by="myroom@conference.localhost" id="1579690081679918" />
<urls />
<origin-id xmlns="urn:xmpp:sid:0" id="358f5b60-3d10-11ea-be33-5f58c62bedc3" />
<body>9</body>
</message>
</item>
</items>
</event>
</message>
已发送撤回消息：
<message xmlns="jabber:client" to="myroom@conference.localhost" type="groupchat">
<apply-to xmlns="urn:xmpp:fasten:0" id="358f5b60-3d10-11ea-be33-5f58c62bedc3">
<retract xmlns="urn:xmpp:message-retract:0" />
</apply-to>
</message>
作为撤回消息发送的结果，服务器广播：
<message xmlns="jabber:client" to="user1@localhost/1132254315040517635831042" from="myroom@conference.localhost" id="2725765463385791444">
<event xmlns="http://jabber.org/protocol/pubsub#event">
<items node="urn:xmpp:mucsub:nodes:messages">
<item id="2725765463385791444">
<message xmlns="jabber:client" xml:lang="en" to="user1@localhost" from="myroom@conference.localhost/user1" type="groupchat">
<apply-to xmlns="urn:xmpp:fasten:0" id="358f5b60-3d10-11ea-be33-5f58c62bedc3">
<retract xmlns="urn:xmpp:message-retract:0" />
</apply-to>
</message>
</item>
</items>
</event>
</message>
当我查询房间的历史时，我会收到：
<message xmlns="jabber:client" to="user1@localhost/395000986606606742032146" from="myroom@conference.localhost">
<result xmlns="urn:xmpp:mam:2" id="1579690081679918">
<forwarded xmlns="urn:xmpp:forward:0">
<message xmlns="jabber:client" xml:lang="en" from="myroom@conference.localhost/user1" type="groupchat">
<x xmlns="http://jabber.org/protocol/muc#user">
<item jid="user1@localhost/1132254315040517635831042" />
</x>
<archived xmlns="urn:xmpp:mam:tmp" by="myroom@conference.localhost" id="1579690081679918" />
<stanza-id xmlns="urn:xmpp:sid:0" by="myroom@conference.localhost" id="1579690081679918" />
<urls />
<origin-id xmlns="urn:xmpp:sid:0" id="358f5b60-3d10-11ea-be33-5f58c62bedc3" />
<body>9</body>
</message>
<delay xmlns="urn:xmpp:delay" from="conference.localhost" stamp="2020-01-22T10:48:01.679918Z" />
</forwarded>
</result>
</message>
我错过了什么？我不应该收到类似tombstone 的消息吗？
到目前为止，我的设置是：
ejabberd 19.09.1 使用MucSub 方法 mod_man 已配置 坚持使用 mysql 5.7 strophe.js 1.3.4这是我的 ejabberd.yml：
hosts:
- "localhost"
loglevel: 4
log_rotate_size: 10485760
log_rotate_date: ""
log_rotate_count: 1
log_rate_limit: 100
certfiles:
- "/etc/letsencrypt/live/localhost/fullchain.pem"
- "/etc/letsencrypt/live/localhost/privkey.pem"
ca_file: "/etc/letsencrypt/live/localhost/cacert.pem"
sql_type: mysql
sql_server: "localhost"
sql_database: "ejabberd"
sql_username: "ejabberd"
sql_password: "****"
sql_port: 3306
auth_method: sql
default_db: sql
listen:
-
port: 5222
ip: "::"
module: ejabberd_c2s
max_stanza_size: 262144
shaper: c2s_shaper
access: c2s
starttls_required: false
-
port: 5269
ip: "::"
module: ejabberd_s2s_in
max_stanza_size: 524288
-
port: 5443
ip: "::"
module: ejabberd_http
tls: true
request_handlers:
"/admin": ejabberd_web_admin
"/api": mod_http_api
"/bosh": mod_bosh
"/captcha": ejabberd_captcha
"/upload": mod_http_upload
### "/ws": ejabberd_http_ws
"/oauth": ejabberd_oauth
-
port: 5280
ip: "::"
module: ejabberd_http
request_handlers:
"/admin": ejabberd_web_admin
"/websocket": ejabberd_http_ws
-
port: 1883
ip: "::"
module: mod_mqtt
backlog: 1000
s2s_use_starttls: optional
acl:
local:
user_regexp: ""
loopback:
ip:
- 127.0.0.0/8
- ::1/128
- ::FFFF:127.0.0.1/128
admin:
user:
- "admin@localhost"
access_rules:
local:
allow: local
c2s:
deny: blocked
allow: all
announce:
allow: admin
configure:
allow: admin
muc_create:
allow: admin
pubsub_createnode:
allow: local
trusted_network:
allow: loopback
api_permissions:
"console commands":
from:
- ejabberd_ctl
who: all
what: "*"
"admin access":
who:
access:
allow:
acl: loopback
acl: admin
oauth:
scope: "ejabberd:admin"
access:
allow:
acl: loopback
acl: admin
what:
- "*"
- "!stop"
- "!start"
"public commands":
who:
ip: 127.0.0.1/8
what:
- status
- connected_users_number
shaper:
normal: 1000
fast: 50000
shaper_rules:
max_user_sessions: 10
max_user_offline_messages:
5000: admin
100: all
c2s_shaper:
none: admin
normal: all
s2s_shaper: fast
max_fsm_queue: 10000
acme:
contact: "mailto:admin@localhost"
ca_url: "https://acme-v01.api.letsencrypt.org"
modules:
mod_adhoc:
mod_admin_extra:
mod_announce:
access: announce
mod_avatar:
mod_blocking:
mod_bosh:
mod_caps:
mod_carboncopy:
mod_client_state:
mod_configure:
mod_disco:
mod_fail2ban:
mod_http_api:
mod_http_upload:
put_url: https://@HOST@:5443/upload
mod_last:
mod_mam:
## Mnesia is limited to 2GB, better to use an SQL backend
## For small servers SQLite is a good fit and is very easy
## to configure. Uncomment this when you have SQL configured:
db_type: sql
assume_mam_usage: true
default: always
mod_mqtt:
mod_muc:
access:
- allow
access_admin:
- allow: admin
access_create: muc_create
access_persistent: muc_create
access_mam:
- allow
default_room_options:
allow_query_users: false
allow_subscription: true # enable MucSub
mam: true
persistent: true
public: false
public_list: false
mod_muc_admin:
mod_offline:
access_max_user_messages: max_user_offline_messages
mod_ping:
mod_privacy:
mod_private:
mod_proxy65:
access: local
max_connections: 5
mod_pubsub:
access_createnode: pubsub_createnode
plugins:
- flat
- pep
force_node_config:
## Avoid buggy clients to make their bookmarks public
storage:bookmarks:
access_model: whitelist
mod_push:
mod_push_keepalive:
mod_register:
## Only accept registration requests from the "trusted"
## network (see access_rules section above).
## Think twice before enabling registration from any
## address. See the Jabber SPAM Manifesto for details:
## https://github.com/ge0rg/jabber-spam-fighting-manifesto
ip_access: trusted_network
mod_roster:
versioning: true
mod_s2s_dialback:
mod_shared_roster:
mod_stream_mgmt:
resend_on_timeout: if_offline
mod_vcard:
mod_vcard_xupdate:
mod_version:
show_os: false
### Local Variables:
### mode: yaml
### End:
### vim: set filetype=yaml tabstop=8
我为那篇长消息道歉，但它提供了上下文。
【问题讨论】：
你的服务器有support XEP-0424吗？ @Flow，我正在使用 ejabberd 19.09.1 社区。在您询问后，我访问了他们的页面 (process-one.net/en/ejabberd/protocols)，我认为它的核心不支持它。 【参考方案1】：目前 ejabberd 不支持 XEP-0424，所以这不起作用。
【讨论】：
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