cbaines/guix-data-service
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Set a statement timeout of 60 seconds for web requests

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This will help stop queries running for an unnecessarily long time, longer
than NGinx will wait for example.
This commit is contained in:
Christopher Baines 2020-04-24 09:00:20 +01:00
parent 0cc78b90ae
commit a0263a0eae
3 changed files with 38 additions and 24 deletions
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8
guix-data-service/web/controller.scm
View file

@ -185,9 +185,10 @@
(define %show-error-details (define %show-error-details
(make-parameter #f)) (make-parameter #f))
(define (controller request method-and-path-components (define* (controller request method-and-path-components
mime-types body mime-types body
secret-key-base) secret-key-base
#:key postgresql-statement-timeout)
(define (controller-thunk) (define (controller-thunk)
(match method-and-path-components (match method-and-path-components
(('GET "assets" rest ...) (('GET "assets" rest ...)
@ -236,7 +237,8 @@
mime-types mime-types
body body
conn conn
secret-key-base)))))) secret-key-base))
#:statement-timeout postgresql-statement-timeout))))
(call-with-error-handling (call-with-error-handling
controller-thunk controller-thunk
#:on-error 'backtrace #:on-error 'backtrace

26
guix-data-service/web/server.scm
View file

@ -29,7 +29,13 @@
#:use-module (guix-data-service web util) #:use-module (guix-data-service web util)
#:export (start-guix-data-service-web-server)) #:export (start-guix-data-service-web-server))
(define (run-controller controller request body secret-key-base) (define (handler request body controller secret-key-base
postgresql-statement-timeout)
(display
(format #f "~a ~a\n"
(request-method request)
(uri-path (request-uri request))))
(apply values
(let-values (((request-components mime-types) (let-values (((request-components mime-types)
(request->path-components-and-mime-type request))) (request->path-components-and-mime-type request)))
(controller request (controller request
@ -37,22 +43,18 @@
request-components) request-components)
mime-types mime-types
body body
secret-key-base))) secret-key-base
#:postgresql-statement-timeout
postgresql-statement-timeout))))
(define (handler request body controller secret-key-base) (define* (start-guix-data-service-web-server port host secret-key-base
(display #:key postgresql-statement-timeout)
(format #f "~a ~a\n"
(request-method request)
(uri-path (request-uri request))))
(apply values
(run-controller controller request body secret-key-base)))
(define (start-guix-data-service-web-server port host secret-key-base)
(call-with-error-handling (call-with-error-handling
(lambda () (lambda ()
(run-server (lambda (request body) (run-server (lambda (request body)
(handler request body controller (handler request body controller
secret-key-base)) secret-key-base
postgresql-statement-timeout))
#:host host #:host host
#:port port)) #:port port))
#:on-error 'backtrace #:on-error 'backtrace

20
scripts/guix-data-service.in
View file

@ -82,8 +82,13 @@
(lambda (opt name arg result) (lambda (opt name arg result)
(alist-cons 'host (alist-cons 'host
arg arg
(alist-delete 'host result)))))) (alist-delete 'host result))))
(option '("postgresql-statement-timeout") #t #f
(lambda (opt name arg result)
(alist-cons 'postgresql-statement-timeout
(string->number arg)
(alist-delete 'postgresql-statement-timeout
result))))))
(define %default-options (define %default-options
;; Alist of default option values ;; Alist of default option values
@ -97,7 +102,9 @@
("" #f) ("" #f)
(_ #t))) (_ #t)))
(port . 8765) (port . 8765)
(host . "0.0.0.0"))) (host . "0.0.0.0")
(postgresql-statement-timeout . 60000)))
(define (parse-options args) (define (parse-options args)
(args-fold (args-fold
@ -187,6 +194,9 @@
(assq-ref opts 'host) (assq-ref opts 'host)
(assq-ref opts 'port)) (assq-ref opts 'port))
(start-guix-data-service-web-server (assq-ref opts 'port) (start-guix-data-service-web-server
(assq-ref opts 'port)
(assq-ref opts 'host) (assq-ref opts 'host)
(assq-ref opts 'secret-key-base)))) (assq-ref opts 'secret-key-base)
#:postgresql-statement-timeout
(assq-ref opts 'postgresql-statement-timeout))))