curl: (52) Empty reply from server while calling ejabbered API Commands - docker

Question

My ejabberd server is running in a docker container and I am trying to call ejabberd API commands. Somehow I am always getting "curl: (52) Empty reply from server". I don't know where I am wrong in configuring yml file for ejabbered.
I tried getting the list of vhosts and registered_users. But all I am getting is Empty reply.
Below is my YML file
hosts:
- localhost
loglevel: 4
log_rotate_size: 10485760
log_rotate_date: ""
log_rotate_count: 1
log_rate_limit: 100
certfiles:
- /home/ejabberd/conf/server.pem
ca_file: "/home/ejabberd/conf/cacert.pem"
## When using let's encrypt to generate certificates
##certfiles:
## - /etc/letsencrypt/live/localhost/fullchain.pem
## - /etc/letsencrypt/live/localhost/privkey.pem
##
##ca_file: "/etc/letsencrypt/live/localhost/fullchain.pem"
listen:
-
port: 5222
ip: "::"
module: ejabberd_c2s
max_stanza_size: 262144
shaper: c2s_shaper
access: c2s
starttls_required: true
-
port: 5269
ip: "::"
module: ejabberd_s2s_in
max_stanza_size: 524288
-
port: 5443
ip: 127.0.0.1
module: ejabberd_http
request_handlers:
/: 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: 5180
ip: "::"
module: ejabberd_http
request_handlers:
/: ejabberd_web_admin
-
port: 1883
ip: "::"
module: mod_mqtt
backlog: 1000
##
## https://docs.ejabberd.im/admin/configuration/#stun-and-turn
## ejabberd_stun: Handles STUN Binding requests
##
##-
## port: 3478
## ip: "0.0.0.0"
## transport: udp
## module: ejabberd_stun
## use_turn: true
## turn_ip: "{{ IP }}"
## auth_type: user
## auth_realm: "example.com"
##-
## port: 3478
## ip: "0.0.0.0"
## module: ejabberd_stun
## use_turn: true
## turn_ip: "{{ IP }}"
## auth_type: user
## auth_realm: "example.com"
##-
## port: 5349
## ip: "0.0.0.0"
## module: ejabberd_stun
## certfile: "/home/ejabberd/conf/server.pem"
## tls: true
## use_turn: true
## turn_ip: "{{ IP }}"
## auth_type: user
## auth_realm: "example.com"
##
## https://docs.ejabberd.im/admin/configuration/#sip
## To handle SIP (VOIP) requests:
##
##-
## port: 5060
## ip: "0.0.0.0"
## transport: udp
## module: ejabberd_sip
##-
## port: 5060
## ip: "0.0.0.0"
## module: ejabberd_sip
##-
## port: 5061
## ip: "0.0.0.0"
## module: ejabberd_sip
## tls: true
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: local
pubsub_createnode:
allow: local
trusted_network:
allow: loopback
api_permissions:
"console commands":
from:
- ejabberd_ctl
- mod_http_api
who: all
what: "*"
"admin access":
who:
access:
allow:
##acl: loopback
acl: admin
oauth:
scope: "ejabberd:admin"
scope: "registered_users"
access:
allow:
##acl: loopback
acl: admin
what:
- "*"
- "!stop"
- "!start"
"public commands":
from:
- mod_http_api
who:
ip: 127.0.0.1/8
what:
- "*"
- "!stop"
- "!start"
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:example-admin#example.com"
ca_url: "https://acme-staging-v02.api.letsencrypt.org/directory"
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: never
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_subscription: true # enable MucSub
mam: 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_sip: {}
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

Answer 1

Assuming a configuration that includes at least those parts:
hosts:
- localhost
listen:
port: 5443
ip: "::"
module: ejabberd_http
tls: true
request_handlers:
"/api": mod_http_api
-
port: 5280
ip: "::"
module: ejabberd_http
request_handlers:
"/api": mod_http_api
api_permissions:
"admin access":
who:
access:
allow: all
what:
- "registered_users"
modules:
...
mod_http_api: {}
All those queries work correctly:
curl -X GET \
http://localhost:5280/api/registered_users?host=localhost
curl -X POST \
http://localhost:5280/api/registered_users \
-d '{"host": "localhost"}'
curl -X GET \
--insecure \
https://localhost:5443/api/registered_users?host=localhost
curl -X POST \
--insecure \
https://localhost:5443/api/registered_users \
-d '{"host": "localhost"}'
All them report the same result:
["admin"]
In the ejabberd log file you should view something like:
2022-02-14 20:13:41.686208+00:00 [info] (<0.758.0>)
Accepted connection [::ffff:172.18.0.1]:50040 -> [::ffff:172.18.0.2]:5443
2022-02-14 20:13:41.696906+00:00 [info]
API call registered_users [{<<"host">>,<<"localhost">>}] from ::ffff:172.18.0.1:50040