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Check-in [bf5639be89]
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Comment:Added timeout on no server. Auto starts a server on timeout
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SHA1: bf5639be892d205124841a184976bb5aac2099d1
User & Date: matt on 2013-05-08 00:34:52
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Context
2013-05-08
00:42
Merged in refactoring of http-transport check-in: 8c3d4217c8 user: matt tags: v1.54
00:34
Added timeout on no server. Auto starts a server on timeout Closed-Leaf check-in: bf5639be89 user: matt tags: refactor-http-transport
2013-05-07
23:06
Refactor http transport check-in: b662cb0a51 user: matt tags: refactor-http-transport
Changes

Modified client.scm from [0cd46ef301] to [8b3b6e88e1].

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    			       (string->symbol (tasks:hostinfo-get-transport hostinfo))
			       'fs))
    ;; ;; DEBUG STUFF
    ;; (if (eq? *transport-type* 'fs)(begin (print "ERROR!!!!!!! refusing to run with transport " *transport-type*)(exit 99)))
    
    (debug:print-info 11 "Using transport type of " *transport-type* (if hostinfo (conc " to connect to " hostinfo) ""))
    (case *transport-type* 
      ((fs)(if (not *megatest-db*)(set! *megatest-db* (open-db))))
      ((fs) ;; (if (not *megatest-db*)(set! *megatest-db* (open-db))))
       ;; we are not doing fs any longer. let's cheat and start up a server
       (set! *transport-type* #f)
       (system "megatest -list-servers | grep alive || megatest -server - -daemonize && sleep 3")
       (thread-sleep! 1)
       (if (> numtries 0)
	   (client:setup numtries: (- numtries 1))))
      ((http)
       (http-transport:client-connect (tasks:hostinfo-get-interface hostinfo)
				      (tasks:hostinfo-get-port hostinfo)))
      ((zmq)
       (zmq-transport:client-connect (tasks:hostinfo-get-interface hostinfo)
				     (tasks:hostinfo-get-port      hostinfo)
				     (tasks:hostinfo-get-pubport   hostinfo)))

Modified db.scm from [98d99ca28b] to [113f8f5bae].

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	    (query-sig   (message-digest-string (md5-primitive) (conc qtype immediate params)))
	    (zdat        (db:obj->string (vector client-sig qtype immediate query-sig params (current-seconds))))) ;; (with-output-to-string (lambda ()(serialize params))))
       (debug:print-info 11 "zdat=" zdat)
       (let* ((res  #f)
	      (rawdat      (http-transport:client-send-receive serverdat zdat))
	      (tmp         #f))
	 (debug:print-info 11 "Sent " zdat ", received " rawdat)
	 (if rawdat
	     (begin
	 (set! tmp (db:string->obj rawdat))
	 (vector-ref tmp 2))))
	       (set! tmp (db:string->obj rawdat))
	       (vector-ref tmp 2))
	     (begin
	       (debug:print 0 "ERROR: Communication with the server failed. Exiting if possible")
	       (exit 1))))))
    ((zmq)
     (handle-exceptions
      exn
      (begin
	(debug:print-info 0 "cdb:client-call timeout or error. Trying again in 5 seconds")
	(thread-sleep! 5) 
	(if (> numretries 0)(apply cdb:client-call serverdat qtype immediate (- numretries 1) params)))

Modified http-transport.scm from [9d03c1c19f] to [f8890a14ba].

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;; S E R V E R   U T I L I T I E S 
;;======================================================================

;;======================================================================
;; C L I E N T S
;;======================================================================

(define *http-mutex* (make-mutex))

;; (system "megatest -list-servers | grep alive || megatest -server - -daemonize && sleep 4")

;; <html>
;; <head></head>
;; <body>1 Hello, world! Goodbye Dolly</body></html>
;; Send msg to serverdat and receive result
(define (http-transport:client-send-receive serverdat msg)
  (let* (;; (url        (http-transport:make-server-url serverdat))
	 (fullurl    (caddr serverdat)) ;; (conc url "/ctrl")) ;; (conc url "/?dat=" msg)))
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			 #t))   ;;  		 (thread-sleep! (/ (if (> numretries 100) 100 numretries) 10))
       (set! numretries (- numretries 1))
       ;;  		 #t))
       ;; send the data and get the response
       ;; extract the needed info from the http data and 
       ;; process and return it.
       (let* ((send-recieve (lambda ()
			      (mutex-lock! *http-mutex*)
			      (set! res (with-input-from-request 
					 fullurl 
					 (list (cons 'dat msg)) 
					 read-string))))
	      (th1 (make-thread send-recieve "with-input-from-request")))
					 read-string))
			      (close-all-connections!) 
			      (mutex-unlock! *http-mutex*)))
	      (time-out     (lambda ()
			      (thread-sleep! 5)
			      (if (not res)
				  (debug:print 0 "ERROR: communication with the server timed out. Exiting."))))
	      (th1 (make-thread send-recieve "with-input-from-request"))
	      (th2 (make-thread time-out     "time out")))
	 (thread-start! th1)
	 (thread-start! th2)
	 (thread-join! th1)
	 (thread-terminate! th2)
	 (debug:print-info 11 "got res=" res)
	 (let ((match (string-search (regexp "<body>(.*)<.body>") res)))
	   (debug:print-info 11 "match=" match)
	   (let ((final (cadr match)))
	     (debug:print-info 11 "final=" final)
	     final)))))))