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(vhost-map `(((* any) . ,(lambda (continue)
;; open the db on the first call
(if (not db)(set! db (open-db)))
(let* (($ (request-vars source: 'both))
(dat ($ 'dat))
(res #f))
(cond
;; This is the /ctrl path where data is handed to the server and
;; responses
((equal? (uri-path (request-uri (current-request)))
'(/ "ctrl"))
(let* ((packet (db:string->obj dat))
(qtype (cdb:packet-get-qtype packet)))
(debug:print-info 12 "server=> received packet=" packet)
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(vhost-map `(((* any) . ,(lambda (continue)
;; open the db on the first call
(if (not db)(set! db (open-db)))
(let* (($ (request-vars source: 'both))
(dat ($ 'dat))
(res #f))
(cond
((equal? (uri-path (request-uri (current-request)))
'(/ "api"))
(send-response body: (api:process-request db $) ;; the $ is the request vars proc
headers: '((content-type text/plain)))
(mutex-lock! *heartbeat-mutex*)
(set! *last-db-access* (current-seconds))
(mutex-unlock! *heartbeat-mutex*))
;; This is the /ctrl path where data is handed to the server and
;; responses
((equal? (uri-path (request-uri (current-request)))
'(/ "ctrl"))
(let* ((packet (db:string->obj dat))
(qtype (cdb:packet-get-qtype packet)))
(debug:print-info 12 "server=> received packet=" packet)
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;;======================================================================
;;======================================================================
;; 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
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;;======================================================================
;;======================================================================
;; C L I E N T S
;;======================================================================
(define *http-mutex* (make-mutex))
(define *http-requests-in-progress* 0)
(define *http-connections-next-cleanup* (current-seconds))
(define (http-transport:get-time-to-cleanup)
(let ((res #f))
(mutex-lock! *http-mutex*)
(set! res (> (current-seconds) *http-connections-next-cleanup*))
(mutex-unlock! *http-mutex*)
res))
(define (http-transport:inc-requests-count)
(mutex-lock! *http-mutex*)
(set! *http-requests-in-progress* (+ 1 *http-requests-in-progress*))
;; Use this opportunity to slow things down iff there are too many requests in flight
(if (> *http-requests-in-progress* 5)
(begin
(debug:print-info 0 "Whoa there buddy, ease up...")
(thread-sleep! 1)))
(mutex-unlock! *http-mutex*))
(define (http-transport:dec-requests-count proc)
(mutex-lock! *http-mutex*)
(proc)
(set! *http-requests-in-progress* (- *http-requests-in-progress* 1))
(mutex-unlock! *http-mutex*))
(define (http-transport:dec-requests-count-and-close-all-connections)
(set! *http-requests-in-progress* (- *http-requests-in-progress* 1))
(let loop ((etime (+ (current-seconds) 5))) ;; give up in five seconds
(if (> *http-requests-in-progress* 0)
(if (> etime (current-seconds))
(begin
(thread-sleep! 0.05)
(loop etime))
(debug:print 0 "ERROR: requests still in progress after 5 seconds of waiting. I'm going to pass on cleaning up http connections"))
(close-all-connections!)))
(set! *http-connections-next-cleanup* (+ (current-seconds) 10))
(mutex-unlock! *http-mutex*))
(define (http-transport:inc-requests-and-prep-to-close-all-connections)
(mutex-lock! *http-mutex*)
(set! *http-requests-in-progress* (+ 1 *http-requests-in-progress*)))
;; (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
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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))
(close-all-connections!)
(mutex-unlock! *http-mutex*)))
(time-out (lambda ()
(thread-sleep! 45)
(if (not res)
(begin
(debug:print 0 "WARNING: communication with the server timed out.")
(mutex-unlock! *http-mutex*)
(http-transport:client-send-receive serverdat msg numretries: (- numretries 1))
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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 ()
;; (let ((dat #f)
;; (cleanup (http-transport:get-time-to-cleanup)))
;; (if cleanup
;; (begin
;; (debug:print-info 0 "Running cleanup mode")
;; (http-transport:inc-requests-and-prep-to-close-all-connections))
;; (http-transport:inc-requests-count))
;; ;; Do the actual data transfer
(mutex-lock! *http-mutex*) ;; Hypothesis is that this was *not* the bottleneck
(set! res (with-input-from-request ;; was set! dat
fullurl
(list (cons 'dat msg))
read-string))
(close-all-connections!)
(mutex-unlock! *http-mutex*)
))
;;(if cleanup
;; ;; mutex already set
;; (begin
;; (set! res dat)
;; (http-transport:dec-requests-count-and-close-all-connections))
;; (http-transport:dec-requests-count
;; (lambda ()
;; (set! res dat)))))))
(time-out (lambda ()
(thread-sleep! 45)
(if (not res)
(begin
(debug:print 0 "WARNING: communication with the server timed out.")
(mutex-unlock! *http-mutex*)
(http-transport:client-send-receive serverdat msg numretries: (- numretries 1))
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(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)))))))
(define (http-transport:client-connect iface port)
(let* ((login-res #f)
(uri-dat (make-request method: 'POST uri: (uri-reference (conc "http://" iface ":" port "/ctrl"))))
(serverdat (list iface port uri-dat)))
(set! login-res (client:login serverdat))
(if (and (not (null? login-res))
(car login-res))
(begin
(debug:print-info 2 "Logged in and connected to " iface ":" port)
(set! *runremote* serverdat)
serverdat)
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(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)))))))
;; Send "cmd" with json payload "params" to serverdat and receive result
;;
(define (http-transport:client-api-send-receive serverdat cmd params #!key (numretries 30))
(let* ((fullurl (if (list? serverdat)
(cadddr serverdat) ;; this is the uri for /api
(begin
(debug:print 0 "FATAL ERROR: http-transport:client-send-receive called with no server info")
(exit 1))))
(res #f))
(handle-exceptions
exn
(begin
;; TODO: Send this output to a log file so it isn't lost when running as daemon
(print "ERROR IN http-transport:client-send-receive " ((condition-property-accessor 'exn 'message) exn))
(thread-sleep! 2)
(if (> numretries 0)
(http-transport:client-api-send-receive serverdat cmd params numretries: (- numretries 1))))
(begin
(debug:print-info 11 "fullurl=" fullurl "\n")
;; set up the http-client here
(max-retry-attempts 5)
;; consider all requests indempotent
(retry-request? (lambda (request)
#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.
;; (with-input-from-request "http://localhost/echo-service"
;; '((test . "value")) read-string)
(let* ((send-recieve (lambda ()
;; (let ((dat #f)
;; (cleanup (http-transport:get-time-to-cleanup)))
;; (if cleanup
;; (http-transport:inc-requests-and-prep-to-close-all-connections)
;; (http-transport:inc-requests-count))
;; ;; Do the actual data transfer NB// KEPP THIS IN SYNC WITH http-transport:client-send-receive
(mutex-lock! *http-mutex*)
(set! res (with-input-from-request ;; was dat
fullurl
(list (cons 'key "thekey")
(cons 'cmd cmd)
(cons 'params params))
read-string))
;; Shouldn't this be a call to the managed call-all-connections stuff above?
(close-all-connections!)
(mutex-unlock! *http-mutex*)
))
;; (if cleanup
;; ;; mutex already set
;; (begin
;; (set! res dat)
;; (http-transport:dec-requests-count-and-close-all-connections))
;; (http-transport:dec-requests-count
;; (lambda ()
;; (set! res dat)))))))
(time-out (lambda ()
(thread-sleep! 45)
(if (not res)
(begin
(debug:print 0 "WARNING: communication with the server timed out.")
(mutex-unlock! *http-mutex*)
(http-transport:client-api-send-receive serverdat cmd params numretries: (- numretries 1))
(if (< numretries 3) ;; on last try just exit
(begin
(debug:print 0 "ERROR: communication with the server timed out. Giving up.")
(exit 1)))))))
(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)
res)))))
(define (http-transport:client-connect iface port)
(let* ((login-res #f)
(uri-dat (make-request method: 'POST uri: (uri-reference (conc "http://" iface ":" port "/ctrl"))))
(uri-api-dat (make-request method: 'POST uri: (uri-reference (conc "http://" iface ":" port "/api"))))
(serverdat (list iface port uri-dat uri-api-dat)))
(set! login-res (client:login serverdat))
(if (and (not (null? login-res))
(car login-res))
(begin
(debug:print-info 2 "Logged in and connected to " iface ":" port)
(set! *runremote* serverdat)
serverdat)
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