114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
;; - keep it simple, only return the actual result of the call, i.e. no meta info here
;;
;; - returns #( flag result )
;;
(define (api:execute-requests dbstruct dat)
(handle-exceptions
exn
(let ((call-chain (get-call-chain))
)
(debug:print 0 *default-log-port* "WARNING: api:execute-requests received an exception from peer")
(print-call-chain (current-error-port))
(debug:print 0 *default-log-port* " message: " ((condition-property-accessor 'exn 'message) exn))
(vector #f (vector exn call-chain dat))) ;; return some stuff for debug if an exception happens
(cond
((not (vector? dat)) ;; it is an error to not receive a vector
(vector #f #f "remote must be called with a vector") )
((> *api-process-request-count* 20)
(vector #f 'overloaded))
(else
(let* ((cmd-in (vector-ref dat 0))
(cmd (if (symbol? cmd-in)
cmd-in
(string->symbol cmd-in)))
(params (vector-ref dat 1))
(start-t (current-milliseconds))
(readonly-mode (dbr:dbstruct-read-only dbstruct))
(readonly-command (member cmd api:read-only-queries))
(writecmd-in-readonly-mode (and readonly-mode (not readonly-command)))
(res
(if writecmd-in-readonly-mode
(conc "attempt to run write command "cmd" on a read-only database")
(case cmd
;;===============================================
;; READ/WRITE QUERIES
|
|
<
|
|
|
|
|
|
|
|
|
|
|
|
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
;; - keep it simple, only return the actual result of the call, i.e. no meta info here
;;
;; - returns #( flag result )
;;
(define (api:execute-requests dbstruct dat)
(handle-exceptions
exn
(let ((call-chain (get-call-chain)))
(debug:print 0 *default-log-port* "WARNING: api:execute-requests received an exception from peer")
(print-call-chain (current-error-port))
(debug:print 0 *default-log-port* " message: " ((condition-property-accessor 'exn 'message) exn))
(vector #f (vector exn call-chain dat))) ;; return some stuff for debug if an exception happens
(cond
((not (vector? dat)) ;; it is an error to not receive a vector
(vector #f (vector #f "remote must be called with a vector")))
((> *api-process-request-count* 20) ;; 20)
'overloaded) ;; the inner vector is what gets returned. nope, don't know why. please refactor!
(else
(let* ((cmd-in (vector-ref dat 0))
(cmd (if (symbol? cmd-in)
cmd-in
(string->symbol cmd-in)))
(params (vector-ref dat 1))
(start-t (current-milliseconds))
(readonly-mode (dbr:dbstruct-read-only dbstruct))
(readonly-command (member cmd api:read-only-queries))
(writecmd-in-readonly-mode (and readonly-mode (not readonly-command)))
(res
(if writecmd-in-readonly-mode
(conc "attempt to run write command "cmd" on a read-only database")
(case cmd
;;===============================================
;; READ/WRITE QUERIES
|
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
|
((sdb-qry) (apply sdb:qry params))
((ping) (current-process-id))
;; TESTMETA
((testmeta-get-record) (apply db:testmeta-get-record dbstruct params))
;; TASKS
((find-task-queue-records) (apply tasks:find-task-queue-records dbstruct params))))))
;; save all stats
(let ((delta-t (- (current-milliseconds)
start-t)))
(hash-table-set! *db-api-call-time* cmd
(cons delta-t (hash-table-ref/default *db-api-call-time* cmd '()))))
(if (not writecmd-in-readonly-mode)
(vector #t res)
(vector #f res)))))))
;; http-server send-response
;; api:process-request
;; db:*
;;
;; NB// Runs on the server as part of the server loop
;;
(define (api:process-request dbstruct $) ;; the $ is the request vars proc
(set! *api-process-request-count* (+ *api-process-request-count* 1))
(let* ((cmd ($ 'cmd))
(paramsj ($ 'params))
(params (db:string->obj paramsj transport: 'http)) ;; (rmt:json-str->dat paramsj))
(resdat (api:execute-requests dbstruct (vector cmd params))) ;; #( flag result )
(res (vector-ref resdat 1)))
(if (> *api-process-request-count* *max-api-process-requests*)
(set! *max-api-process-requests* *api-process-request-count*))
(set! *api-process-request-count* (- *api-process-request-count* 1))
;; This can be here but needs controls to ensure it doesn't run more than every 4 seconds
;; (rmt:dat->json-str
;; (if (or (string? res)
;; (list? res)
;; (number? res)
;; (boolean? res))
;; res
;; (list "ERROR, not string, list, number or boolean" 1 cmd params res)))))
(db:obj->string res transport: 'http)))
|
|
>
>
>
>
|
|
|
|
|
>
|
>
>
|
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
|
((sdb-qry) (apply sdb:qry params))
((ping) (current-process-id))
;; TESTMETA
((testmeta-get-record) (apply db:testmeta-get-record dbstruct params))
;; TASKS
((find-task-queue-records) (apply tasks:find-task-queue-records dbstruct params))
(else
(debug:print 0 *default-log-port* "ERROR: bad api call " cmd)
(conc "ERROR: BAD api call " cmd))))))
;; save all stats
(let ((delta-t (- (current-milliseconds)
start-t)))
(hash-table-set! *db-api-call-time* cmd
(cons delta-t (hash-table-ref/default *db-api-call-time* cmd '()))))
(if writecmd-in-readonly-mode
(vector #f res)
(vector #t res)))))))
;; http-server send-response
;; api:process-request
;; db:*
;;
;; NB// Runs on the server as part of the server loop
;;
(define (api:process-request dbstruct $) ;; the $ is the request vars proc
(set! *api-process-request-count* (+ *api-process-request-count* 1))
(let* ((cmd ($ 'cmd))
(paramsj ($ 'params))
(params (db:string->obj paramsj transport: 'http)) ;; incoming data from the POST (or is it a GET?)
(resdat (api:execute-requests dbstruct (vector cmd params))) ;; process the request, resdat = #( flag result )
(success (vector-ref resdat 0))
(res (vector-ref resdat 1))) ;; (vector flag payload), get the payload, ignore the flag (why?)
(if (not success)
(debug:print 0 *default-log-port* "ERROR: success flag is #f for " cmd " with params " params))
(if (> *api-process-request-count* *max-api-process-requests*)
(set! *max-api-process-requests* *api-process-request-count*))
(set! *api-process-request-count* (- *api-process-request-count* 1))
;; This can be here but needs controls to ensure it doesn't run more than every 4 seconds
;; (rmt:dat->json-str
;; (if (or (string? res)
;; (list? res)
;; (number? res)
;; (boolean? res))
;; res
;; (list "ERROR, not string, list, number or boolean" 1 cmd params res)))))
(db:obj->string res transport: 'http)))
|