前端web页面支持MQTT消息推送
MQTT服务一般用直接下载mosquitto，安装后启动服务即可。方便可靠。
但是默认情况下只开通了1883的tcp访问，用html的web页面上调用就不行了。
其实mosquitto是支持多端口的，在配置文件中加入扩展监听即可
配置见文件
# Config file for mosquitto # # See mosquitto.conf(5) for more information. # # Default values are shown, uncomment to change. # # Use the # character to indicate a comment, but only if it is the # very first character on the line. # ================================================================= # General configuration # ================================================================= # Use per listener security settings. # # It is recommended this option be set before any other options. # # If this option is set to true, then all authentication and access control # options are controlled on a per listener basis. The following options are # affected: # # password_file acl_file psk_file auth_plugin auth_opt_* allow_anonymous # auto_id_prefix allow_zero_length_clientid # # Note that if set to true, then a durable client (i.e. with clean session set # to false) that has disconnected will use the ACL settings defined for the # listener that it was most recently connected to. # # The default behaviour is for this to be set to false, which maintains the # setting behaviour from previous versions of mosquitto. #per_listener_settings false # If a client is subscribed to multiple subscriptions that overlap, e.g. foo/# # and foo/+/baz , then MQTT expects that when the broker receives a message on # a topic that matches both subscriptions, such as foo/bar/baz, then the client # should only receive the message once. # Mosquitto keeps track of which clients a message has been sent to in order to # meet this requirement. The allow_duplicate_messages option allows this # behaviour to be disabled, which may be useful if you have a large number of # clients subscribed to the same set of topics and are very concerned about # minimising memory usage. # It can be safely set to true if you know in advance that your clients will # never have overlapping subscriptions, otherwise your clients must be able to # correctly deal with duplicate messages even when then have QoS=2. #allow_duplicate_messages false # This option controls whether a client is allowed to connect with a zero # length client id or not. This option only affects clients using MQTT v3.1.1 # and later. If set to false, clients connecting with a zero length client id # are disconnected. If set to true, clients will be allocated a client id by # the broker. This means it is only useful for clients with clean session set # to true. #allow_zero_length_clientid true # If allow_zero_length_clientid is true, this option allows you to set a prefix # to automatically generated client ids to aid visibility in logs. # Defaults to 'auto-' #auto_id_prefix auto- # This option affects the scenario when a client subscribes to a topic that has # retained messages. It is possible that the client that published the retained # message to the topic had access at the time they published, but that access # has been subsequently removed. If check_retain_source is set to true, the # default, the source of a retained message will be checked for access rights # before it is republished. When set to false, no check will be made and the # retained message will always be published. This affects all listeners. #check_retain_source true # QoS 1 and 2 messages will be allowed inflight per client until this limit # is exceeded. Defaults to 0. (No maximum) # See also max_inflight_messages #max_inflight_bytes 0 # The maximum number of QoS 1 and 2 messages currently inflight per # client. # This includes messages that are partway through handshakes and # those that are being retried. Defaults to 20. Set to 0 for no # maximum. Setting to 1 will guarantee in-order delivery of QoS 1 # and 2 messages. #max_inflight_messages 20 # For MQTT v5 clients, it is possible to have the server send a "server # keepalive" value that will override the keepalive value set by the client. # This is intended to be used as a mechanism to say that the server will # disconnect the client earlier than it anticipated, and that the client should # use the new keepalive value. The max_keepalive option allows you to specify # that clients may only connect with keepalive less than or equal to this # value, otherwise they will be sent a server keepalive telling them to use # max_keepalive. This only applies to MQTT v5 clients. The maximum value # allowable is 65535. Do not set below 10. #max_keepalive 65535 # For MQTT v5 clients, it is possible to have the server send a "maximum packet # size" value that will instruct the client it will not accept MQTT packets # with size greater than max_packet_size bytes. This applies to the full MQTT # packet, not just the payload. Setting this option to a positive value will # set the maximum packet size to that number of bytes. If a client sends a # packet which is larger than this value, it will be disconnected. This applies # to all clients regardless of the protocol version they are using, but v3.1.1 # and earlier clients will of course not have received the maximum packet size # information. Defaults to no limit. Setting below 20 bytes is forbidden # because it is likely to interfere with ordinary client operation, even with # very small payloads. #max_packet_size 0 # QoS 1 and 2 messages above those currently in-flight will be queued per # client until this limit is exceeded. Defaults to 0. (No maximum) # See also max_queued_messages. # If both max_queued_messages and max_queued_bytes are specified, packets will # be queued until the first limit is reached. #max_queued_bytes 0 # The maximum number of QoS 1 and 2 messages to hold in a queue per client # above those that are currently in-flight. Defaults to 100. Set # to 0 for no maximum (not recommended). # See also queue_qos0_messages. # See also max_queued_bytes. #max_queued_messages 100 # # This option sets the maximum number of heap memory bytes that the broker will # allocate, and hence sets a hard limit on memory use by the broker. Memory # requests that exceed this value will be denied. The effect will vary # depending on what has been denied. If an incoming message is being processed, # then the message will be dropped and the publishing client will be # disconnected. If an outgoing message is being sent, then the individual # message will be dropped and the receiving client will be disconnected. # Defaults to no limit. #memory_limit 0 # This option sets the maximum publish payload size that the broker will allow. # Received messages that exceed this size will not be accepted by the broker. # The default value is 0, which means that all valid MQTT messages are # accepted. MQTT imposes a maximum payload size of 268435455 bytes. #message_size_limit 0 # This option allows persistent clients (those with clean session set to false) # to be removed if they do not reconnect within a certain time frame. # # This is a non-standard option in MQTT V3.1 but allowed in MQTT v3.1.1. # # Badly designed clients may set clean session to false whilst using a randomly # generated client id. This leads to persistent clients that will never # reconnect. This option allows these clients to be removed. # # The expiration period should be an integer followed by one of h d w m y for # hour, day, week, month and year respectively. For example # # persistent_client_expiration 2m # persistent_client_expiration 14d # persistent_client_expiration 1y # # The default if not set is to never expire persistent clients. #persistent_client_expiration # Write process id to a file. Default is a blank string which means # a pid file shouldn't be written. # This should be set to /var/run/mosquitto.pid if mosquitto is # being run automatically on boot with an init script and # start-stop-daemon or similar. #pid_file # Set to true to queue messages with QoS 0 when a persistent client is # disconnected. These messages are included in the limit imposed by # max_queued_messages and max_queued_bytes # Defaults to false. # This is a non-standard option for the MQTT v3.1 spec but is allowed in # v3.1.1. #queue_qos0_messages false # Set to false to disable retained message support. If a client publishes a # message with the retain bit set, it will be disconnected if this is set to # false. #retain_available true # Disable Nagle's algorithm on client sockets. This has the effect of reducing # latency of individual messages at the potential cost of increasing the number # of packets being sent. #set_tcp_nodelay false # Time in seconds between updates of the $SYS tree. # Set to 0 to disable the publishing of the $SYS tree. #sys_interval 10 # The MQTT specification requires that the QoS of a message delivered to a # subscriber is never upgraded to match the QoS of the subscription. Enabling # this option changes this behaviour. If upgrade_outgoing_qos is set true, # messages sent to a subscriber will always match the QoS of its subscription. # This is a non-standard option explicitly disallowed by the spec. #upgrade_outgoing_qos false # When run as root, drop privileges to this user and its primary # group. # Set to root to stay as root, but this is not recommended. # If run as a non-root user, this setting has no effect. # Note that on Windows this has no effect and so mosquitto should # be started by the user you wish it to run as. #user mosquitto # ================================================================= # Default listener # ================================================================= # IP address/hostname to bind the default listener to. If not # given, the default listener will not be bound to a specific # address and so will be accessible to all network interfaces. # bind_address ip-address/host name #bind_address # Port to use for the default listener. port 1883 # Bind the listener to a specific interface. This is similar to # bind_address above but is useful when an interface has multiple addresses or # the address may change. It is valid to use this with the bind_address option, # but take care that the interface you are binding to contains the address you # are binding to, otherwise you will not be able to connect. # Example: bind_interface eth0 #bind_interface # When a listener is using the websockets protocol, it is possible to serve # http data as well. Set http_dir to a directory which contains the files you # wish to serve. If this option is not specified, then no normal http # connections will be possible. #http_dir # The maximum number of client connections to allow. This is # a per listener setting. # Default is -1, which means unlimited connections. # Note that other process limits mean that unlimited connections # are not really possible. Typically the default maximum number of # connections possible is around 1024. #max_connections -1 # Choose the protocol to use when listening. # This can be either mqtt or websockets. # Websockets support is currently disabled by default at compile time. # Certificate based TLS may be used with websockets, except that # only the cafile, certfile, keyfile and ciphers options are supported. #protocol mqtt protocol mqtt # Set use_username_as_clientid to true to replace the clientid that a client # connected with with its username. This allows authentication to be tied to # the clientid, which means that it is possible to prevent one client # disconnecting another by using the same clientid. # If a client connects with no username it will be disconnected as not # authorised when this option is set to true. # Do not use in conjunction with clientid_prefixes. # See also use_identity_as_username. #use_username_as_clientid # ----------------------------------------------------------------- # Certificate based SSL/TLS support # ----------------------------------------------------------------- # The following options can be used to enable SSL/TLS support for # this listener. Note that the recommended port for MQTT over TLS # is 8883, but this must be set manually. # # See also the mosquitto-tls man page. # At least one of cafile or capath must be defined. They both # define methods of accessing the PEM encoded Certificate # Authority certificates that have signed your server certificate # and that you wish to trust. # cafile defines the path to a file containing the CA certificates. # capath defines a directory that will be searched for files # containing the CA certificates. For capath to work correctly, the # certificate files must have ".crt" as the file ending and you must run # "openssl rehash <path to capath>" each time you add/remove a certificate. #cafile #capath # Path to the PEM encoded server certificate. #certfile # Path to the PEM encoded keyfile. #keyfile # If you have require_certificate set to true, you can create a certificate # revocation list file to revoke access to particular client certificates. If # you have done this, use crlfile to point to the PEM encoded revocation file. #crlfile # If you wish to control which encryption ciphers are used, use the ciphers # option. The list of available ciphers can be obtained using the "openssl # ciphers" command and should be provided in the same format as the output of # that command. # If unset defaults to DEFAULT:!aNULL:!eNULL:!LOW:!EXPORT:!SSLv2:@STRENGTH #ciphers DEFAULT:!aNULL:!eNULL:!LOW:!EXPORT:!SSLv2:@STRENGTH # To allow the use of ephemeral DH key exchange, which provides forward # security, the listener must load DH parameters. This can be specified with # the dhparamfile option. The dhparamfile can be generated with the command # e.g. "openssl dhparam -out dhparam.pem 2048" #dhparamfile # By default a TLS enabled listener will operate in a similar fashion to a # https enabled web server, in that the server has a certificate signed by a CA # and the client will verify that it is a trusted certificate. The overall aim # is encryption of the network traffic. By setting require_certificate to true, # the client must provide a valid certificate in order for the network # connection to proceed. This allows access to the broker to be controlled # outside of the mechanisms provided by MQTT. #require_certificate false # This option defines the version of the TLS protocol to use for this listener. # The default value allows all of v1.3, v1.2 and v1.1. The valid values are # tlsv1.3 tlsv1.2 and tlsv1.1. #tls_version # If require_certificate is true, you may set use_identity_as_username to true # to use the CN value from the client certificate as a username. If this is # true, the password_file option will not be used for this listener. # This takes priority over use_subject_as_username. # See also use_subject_as_username. #use_identity_as_username false # If require_certificate is true, you may set use_subject_as_username to true # to use the complete subject value from the client certificate as a username. # If this is true, the password_file option will not be used for this listener. # See also use_identity_as_username #use_subject_as_username false # ----------------------------------------------------------------- # Pre-shared-key based SSL/TLS support # ----------------------------------------------------------------- # The following options can be used to enable PSK based SSL/TLS support for # this listener. Note that the recommended port for MQTT over TLS is 8883, but # this must be set manually. # # See also the mosquitto-tls man page and the "Certificate based SSL/TLS # support" section. Only one of certificate or PSK encryption support can be # enabled for any listener. # The psk_hint option enables pre-shared-key support for this listener and also # acts as an identifier for this listener. The hint is sent to clients and may # be used locally to aid authentication. The hint is a free form string that # doesn't have much meaning in itself, so feel free to be creative. # If this option is provided, see psk_file to define the pre-shared keys to be # used or create a security plugin to handle them. #psk_hint # When using PSK, the encryption ciphers used will be chosen from the list of # available PSK ciphers. If you want to control which ciphers are available, # use the "ciphers" option. The list of available ciphers can be obtained # using the "openssl ciphers" command and should be provided in the same format # as the output of that command. #ciphers # Set use_identity_as_username to have the psk identity sent by the client used # as its username. Authentication will be carried out using the PSK rather than # the MQTT username/password and so password_file will not be used for this # listener. #use_identity_as_username false # ================================================================= # Extra listeners # ================================================================= # Listen on a port/ip address combination. By using this variable # multiple times, mosquitto can listen on more than one port. If # this variable is used and neither bind_address nor port given, # then the default listener will not be started. # The port number to listen on must be given. Optionally, an ip # address or host name may be supplied as a second argument. In # this case, mosquitto will attempt to bind the listener to that # address and so restrict access to the associated network and # interface. By default, mosquitto will listen on all interfaces. # Note that for a websockets listener it is not possible to bind to a host # name. # listener port-number [ip address/host name] listener 9988 # Bind the listener to a specific interface. This is similar to # the [ip address/host name] part of the listener definition, but is useful # when an interface has multiple addresses or the address may change. It is # valid to use this with the [ip address/host name] part of the listener # definition, but take care that the interface you are binding to contains the # address you are binding to, otherwise you will not be able to connect. # Only available on Linux and requires elevated privileges. # # Example: bind_interface eth0 #bind_interface # When a listener is using the websockets protocol, it is possible to serve # http data as well. Set http_dir to a directory which contains the files you # wish to serve. If this option is not specified, then no normal http # connections will be possible. #http_dir # The maximum number of client connections to allow. This is # a per listener setting. # Default is -1, which means unlimited connections. # Note that other process limits mean that unlimited connections # are not really possible. Typically the default maximum number of # connections possible is around 1024. #max_connections -1 # The listener can be restricted to operating within a topic hierarchy using # the mount_point option. This is achieved be prefixing the mount_point string # to all topics for any clients connected to this listener. This prefixing only # happens internally to the broker; the client will not see the prefix. #mount_point # Choose the protocol to use when listening. # This can be either mqtt or websockets. # Certificate based TLS may be used with websockets, except that only the # cafile, certfile, keyfile and ciphers options are supported. protocol websockets # Set use_username_as_clientid to true to replace the clientid that a client # connected with with its username. This allows authentication to be tied to # the clientid, which means that it is possible to prevent one client # disconnecting another by using the same clientid. # If a client connects with no username it will be disconnected as not # authorised when this option is set to true. # Do not use in conjunction with clientid_prefixes. # See also use_identity_as_username. #use_username_as_clientid # Change the websockets headers size. This is a global option, it is not # possible to set per listener. This option sets the size of the buffer used in # the libwebsockets library when reading HTTP headers. If you are passing large # header data such as cookies then you may need to increase this value. If left # unset, or set to 0, then the default of 1024 bytes will be used. #websockets_headers_size # ----------------------------------------------------------------- # Certificate based SSL/TLS support # ----------------------------------------------------------------- # The following options can be used to enable certificate based SSL/TLS support # for this listener. Note that the recommended port for MQTT over TLS is 8883, # but this must be set manually. # # See also the mosquitto-tls man page and the "Pre-shared-key based SSL/TLS # support" section. Only one of certificate or PSK encryption support can be # enabled for any listener. # At least one of cafile or capath must be defined to enable certificate based # TLS encryption. They both define methods of accessing the PEM encoded # Certificate Authority certificates that have signed your server certificate # and that you wish to trust. # cafile defines the path to a file containing the CA certificates. # capath defines a directory that will be searched for files # containing the CA certificates. For capath to work correctly, the # certificate files must have ".crt" as the file ending and you must run # "openssl rehash <path to capath>" each time you add/remove a certificate. #cafile #capath # Path to the PEM encoded server certificate. #certfile # Path to the PEM encoded keyfile. #keyfile # If you wish to control which encryption ciphers are used, use the ciphers # option. The list of available ciphers can be optained using the "openssl # ciphers" command and should be provided in the same format as the output of # that command. #ciphers # If you have require_certificate set to true, you can create a certificate # revocation list file to revoke access to particular client certificates. If # you have done this, use crlfile to point to the PEM encoded revocation file. #crlfile # To allow the use of ephemeral DH key exchange, which provides forward # security, the listener must load DH parameters. This can be specified with # the dhparamfile option. The dhparamfile can be generated with the command # e.g. "openssl dhparam -out dhparam.pem 2048" #dhparamfile # By default an TLS enabled listener will operate in a similar fashion to a # https enabled web server, in that the server has a certificate signed by a CA # and the client will verify that it is a trusted certificate. The overall aim # is encryption of the network traffic. By setting require_certificate to true, # the client must provide a valid certificate in order for the network # connection to proceed. This allows access to the broker to be controlled # outside of the mechanisms provided by MQTT. #require_certificate false # If require_certificate is true, you may set use_identity_as_username to true # to use the CN value from the client certificate as a username. If this is # true, the password_file option will not be used for this listener. #use_identity_as_username false # ----------------------------------------------------------------- # Pre-shared-key based SSL/TLS support # ----------------------------------------------------------------- # The following options can be used to enable PSK based SSL/TLS support for # this listener. Note that the recommended port for MQTT over TLS is 8883, but # this must be set manually. # # See also the mosquitto-tls man page and the "Certificate based SSL/TLS # support" section. Only one of certificate or PSK encryption support can be # enabled for any listener. # The psk_hint option enables pre-shared-key support for this listener and also # acts as an identifier for this listener. The hint is sent to clients and may # be used locally to aid authentication. The hint is a free form string that # doesn't have much meaning in itself, so feel free to be creative. # If this option is provided, see psk_file to define the pre-shared keys to be # used or create a security plugin to handle them. #psk_hint # When using PSK, the encryption ciphers used will be chosen from the list of # available PSK ciphers. If you want to control which ciphers are available, # use the "ciphers" option. The list of available ciphers can be optained # using the "openssl ciphers" command and should be provided in the same format # as the output of that command. #ciphers # Set use_identity_as_username to have the psk identity sent by the client used # as its username. Authentication will be carried out using the PSK rather than # the MQTT username/password and so password_file will not be used for this # listener. #use_identity_as_username false # ================================================================= # Persistence # ================================================================= # If persistence is enabled, save the in-memory database to disk # every autosave_interval seconds. If set to 0, the persistence # database will only be written when mosquitto exits. See also # autosave_on_changes. # Note that writing of the persistence database can be forced by # sending mosquitto a SIGUSR1 signal. #autosave_interval 1800 # If true, mosquitto will count the number of subscription changes, retained # messages received and queued messages and if the total exceeds # autosave_interval then the in-memory database will be saved to disk. # If false, mosquitto will save the in-memory database to disk by treating # autosave_interval as a time in seconds. #autosave_on_changes false # Save persistent message data to disk (true/false). # This saves information about all messages, including # subscriptions, currently in-flight messages and retained # messages. # retained_persistence is a synonym for this option. #persistence false # The filename to use for the persistent database, not including # the path. #persistence_file mosquitto.db # Location for persistent database. Must include trailing / # Default is an empty string (current directory). # Set to e.g. /var/lib/mosquitto/ if running as a proper service on Linux or # similar. #persistence_location # ================================================================= # Logging # ================================================================= # Places to log to. Use multiple log_dest lines for multiple # logging destinations. # Possible destinations are: stdout stderr syslog topic file # # stdout and stderr log to the console on the named output. # # syslog uses the userspace syslog facility which usually ends up # in /var/log/messages or similar. # # topic logs to the broker topic '$SYS/broker/log/<severity>', # where severity is one of D, E, W, N, I, M which are debug, error, # warning, notice, information and message. Message type severity is used by # the subscribe/unsubscribe log_types and publishes log messages to # $SYS/broker/log/M/susbcribe or $SYS/broker/log/M/unsubscribe. # # The file destination requires an additional parameter which is the file to be # logged to, e.g. "log_dest file /var/log/mosquitto.log". The file will be # closed and reopened when the broker receives a HUP signal. Only a single file # destination may be configured. # # Note that if the broker is running as a Windows service it will default to # "log_dest none" and neither stdout nor stderr logging is available. # Use "log_dest none" if you wish to disable logging. #log_dest stderr # Types of messages to log. Use multiple log_type lines for logging # multiple types of messages. # Possible types are: debug, error, warning, notice, information, # none, subscribe, unsubscribe, websockets, all. # Note that debug type messages are for decoding the incoming/outgoing # network packets. They are not logged in "topics". #log_type error #log_type warning #log_type notice #log_type information #log_type websockets # If set to true, client connection and disconnection messages will be included # in the log. #connection_messages true # If using syslog logging (not on Windows), messages will be logged to the # "daemon" facility by default. Use the log_facility option to choose which of # local0 to local7 to log to instead. The option value should be an integer # value, e.g. "log_facility 5" to use local5. #log_facility # If set to true, add a timestamp value to each log message. #log_timestamp true # Set the format of the log timestamp. If left unset, this is the number of # seconds since the Unix epoch. # This is a free text string which will be passed to the strftime function. To # get an ISO 8601 datetime, for example: # log_timestamp_format %Y-%m-%dT%H:%M:%S #log_timestamp_format # Change the websockets logging level. This is a global option, it is not # possible to set per listener. This is an integer that is interpreted by # libwebsockets as a bit mask for its lws_log_levels enum. See the # libwebsockets documentation for more details. "log_type websockets" must also # be enabled. websockets_log_level 0 # ================================================================= # Security # ================================================================= # If set, only clients that have a matching prefix on their # clientid will be allowed to connect to the broker. By default, # all clients may connect. # For example, setting "secure-" here would mean a client "secure- # client" could connect but another with clientid "mqtt" couldn't. #clientid_prefixes # Boolean value that determines whether clients that connect # without providing a username are allowed to connect. If set to # false then a password file should be created (see the # password_file option) to control authenticated client access. # # Defaults to true if no other security options are set. If `password_file` or # `psk_file` is set, or if an authentication plugin is loaded which implements # username/password or TLS-PSK checks, then `allow_anonymous` defaults to # false. # #allow_anonymous true # ----------------------------------------------------------------- # Default authentication and topic access control # ----------------------------------------------------------------- # Control access to the broker using a password file. This file can be # generated using the mosquitto_passwd utility. If TLS support is not compiled # into mosquitto (it is recommended that TLS support should be included) then # plain text passwords are used, in which case the file should be a text file # with lines in the format: # username:password # The password (and colon) may be omitted if desired, although this # offers very little in the way of security. # # See the TLS client require_certificate and use_identity_as_username options # for alternative authentication options. If an auth_plugin is used as well as # password_file, the auth_plugin check will be made first. #password_file # Access may also be controlled using a pre-shared-key file. This requires # TLS-PSK support and a listener configured to use it. The file should be text # lines in the format: # identity:key # The key should be in hexadecimal format without a leading "0x". # If an auth_plugin is used as well, the auth_plugin check will be made first. #psk_file # Control access to topics on the broker using an access control list # file. If this parameter is defined then only the topics listed will # have access. # If the first character of a line of the ACL file is a # it is treated as a # comment. # Topic access is added with lines of the format: # # topic [read|write|readwrite] <topic> # # The access type is controlled using "read", "write" or "readwrite". This # parameter is optional (unless <topic> contains a space character) - if not # given then the access is read/write. <topic> can contain the + or # # wildcards as in subscriptions. # # The first set of topics are applied to anonymous clients, assuming # allow_anonymous is true. User specific topic ACLs are added after a # user line as follows: # # user <username> # # The username referred to here is the same as in password_file. It is # not the clientid. # # # If is also possible to define ACLs based on pattern substitution within the # topic. The patterns available for substition are: # # %c to match the client id of the client # %u to match the username of the client # # The substitution pattern must be the only text for that level of hierarchy. # # The form is the same as for the topic keyword, but using pattern as the # keyword. # Pattern ACLs apply to all users even if the "user" keyword has previously # been given. # # If using bridges with usernames and ACLs, connection messages can be allowed # with the following pattern: # pattern write $SYS/broker/connection/%c/state # # pattern [read|write|readwrite] <topic> # # Example: # # pattern write sensor/%u/data # # If an auth_plugin is used as well as acl_file, the auth_plugin check will be # made first. #acl_file # ----------------------------------------------------------------- # External authentication and topic access plugin options # ----------------------------------------------------------------- # External authentication and access control can be supported with the # auth_plugin option. This is a path to a loadable plugin. See also the # auth_opt_* options described below. # # The auth_plugin option can be specified multiple times to load multiple # plugins. The plugins will be processed in the order that they are specified # here. If the auth_plugin option is specified alongside either of # password_file or acl_file then the plugin checks will be made first. # #auth_plugin # If the auth_plugin option above is used, define options to pass to the # plugin here as described by the plugin instructions. All options named # using the format auth_opt_* will be passed to the plugin, for example: # # auth_opt_db_host # auth_opt_db_port # auth_opt_db_username # auth_opt_db_password # ================================================================= # Bridges # ================================================================= # A bridge is a way of connecting multiple MQTT brokers together. # Create a new bridge using the "connection" option as described below. Set # options for the bridges using the remaining parameters. You must specify the # address and at least one topic to subscribe to. # # Each connection must have a unique name. # # The address line may have multiple host address and ports specified. See # below in the round_robin description for more details on bridge behaviour if # multiple addresses are used. Note that if you use an IPv6 address, then you # are required to specify a port. # # The direction that the topic will be shared can be chosen by # specifying out, in or both, where the default value is out. # The QoS level of the bridged communication can be specified with the next # topic option. The default QoS level is 0, to change the QoS the topic # direction must also be given. # # The local and remote prefix options allow a topic to be remapped when it is # bridged to/from the remote broker. This provides the ability to place a topic # tree in an appropriate location. # # For more details see the mosquitto.conf man page. # # Multiple topics can be specified per connection, but be careful # not to create any loops. # # If you are using bridges with cleansession set to false (the default), then # you may get unexpected behaviour from incoming topics if you change what # topics you are subscribing to. This is because the remote broker keeps the # subscription for the old topic. If you have this problem, connect your bridge # with cleansession set to true, then reconnect with cleansession set to false # as normal. #connection <name> #address <host>[:<port>] [<host>[:<port>]] #topic <topic> [[[out | in | both] qos-level] local-prefix remote-prefix] # If a bridge has topics that have "out" direction, the default behaviour is to # send an unsubscribe request to the remote broker on that topic. This means # that changing a topic direction from "in" to "out" will not keep receiving # incoming messages. Sending these unsubscribe requests is not always # desirable, setting bridge_attempt_unsubscribe to false will disable sending # the unsubscribe request. #bridge_attempt_unsubscribe true # Set the version of the MQTT protocol to use with for this bridge. Can be one # of mqttv311 or mqttv11. Defaults to mqttv311. #bridge_protocol_version mqttv311 # Set the clean session variable for this bridge. # When set to true, when the bridge disconnects for any reason, all # messages and subscriptions will be cleaned up on the remote # broker. Note that with cleansession set to true, there may be a # significant amount of retained messages sent when the bridge # reconnects after losing its connection. # When set to false, the subscriptions and messages are kept on the # remote broker, and delivered when the bridge reconnects. #cleansession false # Set the amount of time a bridge using the lazy start type must be idle before # it will be stopped. Defaults to 60 seconds. #idle_timeout 60 # Set the keepalive interval for this bridge connection, in # seconds. #keepalive_interval 60 # Set the clientid to use on the local broker. If not defined, this defaults to # 'local.<clientid>'. If you are bridging a broker to itself, it is important # that local_clientid and clientid do not match. #local_clientid # If set to true, publish notification messages to the local and remote brokers # giving information about the state of the bridge connection. Retained # messages are published to the topic $SYS/broker/connection/<clientid>/state # unless the notification_topic option is used. # If the message is 1 then the connection is active, or 0 if the connection has # failed. # This uses the last will and testament feature. #notifications true # Choose the topic on which notification messages for this bridge are # published. If not set, messages are published on the topic # $SYS/broker/connection/<clientid>/state #notification_topic # Set the client id to use on the remote end of this bridge connection. If not # defined, this defaults to 'name.hostname' where name is the connection name # and hostname is the hostname of this computer. # This replaces the old "clientid" option to avoid confusion. "clientid" # remains valid for the time being. #remote_clientid # Set the password to use when connecting to a broker that requires # authentication. This option is only used if remote_username is also set. # This replaces the old "password" option to avoid confusion. "password" # remains valid for the time being. #remote_password # Set the username to use when connecting to a broker that requires # authentication. # This replaces the old "username" option to avoid confusion. "username" # remains valid for the time being. #remote_username # Set the amount of time a bridge using the automatic start type will wait # until attempting to reconnect. # This option can be configured to use a constant delay time in seconds, or to # use a backoff mechanism based on "Decorrelated Jitter", which adds a degree # of randomness to when the restart occurs. # # Set a constant timeout of 20 seconds: # restart_timeout 20 # # Set backoff with a base (start value) of 10 seconds and a cap (upper limit) of # 60 seconds: # restart_timeout 10 30 # # Defaults to jitter with a base of 5 and cap of 30 #restart_timeout 5 30 # If the bridge has more than one address given in the address/addresses # configuration, the round_robin option defines the behaviour of the bridge on # a failure of the bridge connection. If round_robin is false, the default # value, then the first address is treated as the main bridge connection. If # the connection fails, the other secondary addresses will be attempted in # turn. Whilst connected to a secondary bridge, the bridge will periodically # attempt to reconnect to the main bridge until successful. # If round_robin is true, then all addresses are treated as equals. If a # connection fails, the next address will be tried and if successful will # remain connected until it fails #round_robin false # Set the start type of the bridge. This controls how the bridge starts and # can be one of three types: automatic, lazy and once. Note that RSMB provides # a fourth start type "manual" which isn't currently supported by mosquitto. # # "automatic" is the default start type and means that the bridge connection # will be started automatically when the broker starts and also restarted # after a short delay (30 seconds) if the connection fails. # # Bridges using the "lazy" start type will be started automatically when the # number of queued messages exceeds the number set with the "threshold" # parameter. It will be stopped automatically after the time set by the # "idle_timeout" parameter. Use this start type if you wish the connection to # only be active when it is needed. # # A bridge using the "once" start type will be started automatically when the # broker starts but will not be restarted if the connection fails. #start_type automatic # Set the number of messages that need to be queued for a bridge with lazy # start type to be restarted. Defaults to 10 messages. # Must be less than max_queued_messages. #threshold 10 # If try_private is set to true, the bridge will attempt to indicate to the # remote broker that it is a bridge not an ordinary client. If successful, this # means that loop detection will be more effective and that retained messages # will be propagated correctly. Not all brokers support this feature so it may # be necessary to set try_private to false if your bridge does not connect # properly. #try_private true # ----------------------------------------------------------------- # Certificate based SSL/TLS support # ----------------------------------------------------------------- # Either bridge_cafile or bridge_capath must be defined to enable TLS support # for this bridge. # bridge_cafile defines the path to a file containing the # Certificate Authority certificates that have signed the remote broker # certificate. # bridge_capath defines a directory that will be searched for files containing # the CA certificates. For bridge_capath to work correctly, the certificate # files must have ".crt" as the file ending and you must run "openssl rehash # <path to capath>" each time you add/remove a certificate. #bridge_cafile #bridge_capath # If the remote broker has more than one protocol available on its port, e.g. # MQTT and WebSockets, then use bridge_alpn to configure which protocol is # requested. Note that WebSockets support for bridges is not yet available. #bridge_alpn # When using certificate based encryption, bridge_insecure disables # verification of the server hostname in the server certificate. This can be # useful when testing initial server configurations, but makes it possible for # a malicious third party to impersonate your server through DNS spoofing, for # example. Use this option in testing only. If you need to resort to using this # option in a production environment, your setup is at fault and there is no # point using encryption. #bridge_insecure false # Path to the PEM encoded client certificate, if required by the remote broker. #bridge_certfile # Path to the PEM encoded client private key, if required by the remote broker. #bridge_keyfile # ----------------------------------------------------------------- # PSK based SSL/TLS support # ----------------------------------------------------------------- # Pre-shared-key encryption provides an alternative to certificate based # encryption. A bridge can be configured to use PSK with the bridge_identity # and bridge_psk options. These are the client PSK identity, and pre-shared-key # in hexadecimal format with no "0x". Only one of certificate and PSK based # encryption can be used on one # bridge at once. #bridge_identity #bridge_psk # ================================================================= # External config files # ================================================================= # External configuration files may be included by using the # include_dir option. This defines a directory that will be searched # for config files. All files that end in '.conf' will be loaded as # a configuration file. It is best to have this as the last option # in the main file. This option will only be processed from the main # configuration file. The directory specified must not contain the # main configuration file. # Files within include_dir will be loaded sorted in case-sensitive # alphabetical order, with capital letters ordered first. If this option is # given multiple times, all of the files from the first instance will be # processed before the next instance. See the man page for examples. #include_dir
前端页面就可以通过9988端口访问了，其实是通过websockets访问的。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
</head>
<body>
<input type="text" id="msg"/>
<input type="button" value="订阅主题" onclick="subscribe()"/>
<input type="button" value="发送消息" onclick="send()"/>
<input type="button" value="取消订阅" onclick="unsubscribe()"/>
</body>
<script src="jquery-3.3.1.min.js"></script>
<script src="mqttws31.js"></script>
<script>
var hostname = '192.168.0.3',
port = 9988,
clientId = 'clientmao2080',
timeout = 5,
keepAlive = 50,
cleanSession = false,
ssl = false,
userName = 'admin',
password = 'password',
topic = 'web';
client = new Paho.MQTT.Client(hostname, port, clientId);
var options = {
invocationContext: {
host : hostname,
port: port,
path: client.path,
clientId: clientId
},
timeout: timeout,
keepAliveInterval: keepAlive,
cleanSession: cleanSession,
useSSL: ssl,
userName: userName,
password: password,
onSuccess: onConnect,
onFailure: function(e){
console.log(e);
}
};
client.connect(options);
function onConnect() {
console.log("onConnected");
}
client.onConnectionLost = onConnectionLost;
client.onMessageArrived = onMessageArrived;
function onConnectionLost(responseObject) {
console.log(responseObject);
if (responseObject.errorCode !== 0) {
console.log("onConnectionLost:"+responseObject.errorMessage);
console.log("连接已断开");
}
}
function onMessageArrived(message) {
console.log("收到消息:"+message.payloadString);
}
function send(){
var s = document.getElementById("msg").value;
if(s.length > 0){
message = new Paho.MQTT.Message(s);
message.destinationName = topic;
client.send(message);
document.getElementById("msg").value = "";
console.log("消息发送成功"+s);
}
else {
alert("发送的消息不能为空");
}
}
var count = 0;
function subscribe(){
client.subscribe(topic, { qos: 2});
console.log("订阅主题:"+topic);
}
function unsubscribe(){
client.unsubscribe(topic);
console.log("取消订阅主题:"+topic);
}
</script>
