官方参看文档：
HTTP GET 接收主题请求协议和响应协议
http://publib.boulder.ibm.com/infocenter/wmqv7/v7r0/topic/com.ibm.mq.csqzau.doc/ts21230_.htm
HTTP POST 发布主题请求协议和响应协议
http://publib.boulder.ibm.com/infocenter/wmqv7/v7r0/topic/com.ibm.mq.csqzau.doc/ts21220_.htm
HTTP DELETE 订阅主题请求协议和响应协议
http://publib.boulder.ibm.com/infocenter/wmqv7/v7r0/topic/com.ibm.mq.csqzau.doc/ts21240_.htm
请求响应头各个字段的含义的讲解
http://publib.boulder.ibm.com/infocenter/wmqv7/v7r0/topic/com.ibm.mq.csqzau.doc/ts21250_.htm
响应错误处理
http://publib.boulder.ibm.com/infocenter/wmqv7/v7r0/topic/com.ibm.mq.csqzau.doc/ts21340_.htm
The HTTP GET operation gets a message from a WebSphere® MQ queue. The message is left on the queue. The HTTP GET operation is equivalent to browsing a WebSphere MQ queue.
Request >>-+-DELETE-+-- --| Path |-- --HTTP version--CRLF---------------> ‘-GET----‘ .-CRLF---------------. .-CRLF---------------. V | V | >----+----------------+-+----+----------------+-+---------------> ‘-general-header-‘ ‘-request-header-‘ .-CRLF----------------------------. V | >----+-----------------------------+-+------------------------->< ‘-| Entity-header (Request) |-‘ Path |--/--contextRoot--/--------------------------------------------> >--msg/--+-queue/--queueName--+-------------+-+--/--------------| | ‘-@--qMgrName-‘ | ‘-topic/--topicName------------------‘ entity-header (Request) |--+----------------------------------------------+-------------| +-standard entity-header-- --entity-value------+ +-x-msg-correlId - --correlation ID------------+ +-x-msg-msgId - --message ID-------------------+ +-x-msg-range-- --range------------------------+ +-x-msg-require-headers-- --entity header name-+ ‘-x-msg-wait - --wait time---------------------‘
Response >>-HTTP version-- --HTTP Status-Code-- --HTTP Reason-Phrase--CRLF--> .-CRLF---------------. .-CRLF----------------. V | V | >----+----------------+-+----+-----------------+-+--------------> ‘-general-header-‘ ‘-response-header-‘ .-CRLF-----------------------------. V | >----+------------------------------+-+--+---------------+----->< ‘-| Entity-header (Response) |-‘ ‘-CRLF--Message-‘ entity-header (Response) |--+-----------------------------------------+------------------| +-standard entity-header-- --entity-value-+ +-x-msg-class-- --message type------------+ +-x-msg-correlId-- --correlation ID-------+ +-x-msg-encoding-- --encoding type--------+ +-x-msg-expiry-- --duration---------------+ +-x-msg-format-- --message format---------+ +-x-msg-msgId-- --message ID--------------+ +-x-msg-persistence-- --persistence-------+ +-x-msg-priority-- --priority class-------+ +-x-msg-replyTo-- --reply-to queue--------+ +-x-msg-timestamp-- --HTTP-date-----------+ ‘-x-msg-usr-- --user properties-----------‘
HTTP GET gets a message from a queue. The message remains on the queue. In WebSphere MQ terms, HTTP GET is a browse request. You could create an HTTP DELETE request using a Java client, a browser form, or an AJAX toolkit.
Figure 1 is an HTTP request to browse the next message on queue called myQueue.
The request contains the HTTP request header x-msg-wait, which instructs WebSphere MQ bridge for HTTP how long to wait for a message to arrive on the queue. The request also contains the x-msg-require-headersrequest header, which specifies that the client is to receive the message correlation ID in the response.
GET /msg/queue/myQueue/ HTTP/1.1 Host: www.example.org x-msg-wait: 10 x-msg-require-headers: correlID
Figure 2 is the response returned to the client. The correlation ID is returned to the client, as requested in x-msg-require-headers of the request.
HTTP/1.1 200 OK Date: Wed, 2 Jan 2007 22:38:34 GMT Server: Apache-Coyote/1.1 WMQ-HTTP/1.1 JEE-Bridge/1.1 Content-Length: 50 Content-Type: text/plain; charset=utf-8 x-msg-correlId: 1234567890 Here‘s my message body that will appear on the queue.
MQTT的学习研究（九）基于HTTP GET MQTT 抓取消息服务端使用
原文：http://www.cnblogs.com/yudar/p/4614689.html