+ Use SRFI-37 (arg-fold) for parsing command-line-arguments
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eknauel
parent
2b27ee6569
commit
b7314f87f1
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@ -18,16 +18,20 @@ exec scsh -lel sunet-2.1/load.scm -lel ssax/load.scm -dm -o surflet-server -e ma
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surflet-handler
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surflet-handler/options
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let-opt
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scsh
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scheme)
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scsh
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scheme
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srfi-37
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signals)
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(begin
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(define (usage)
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(format #f
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"Usage: start-surflet-server [-h htdocs-dir] [-s surflet-dir] [-i images-dir]
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[-p port] [-l log-file-name]
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[-r requests] [--help]
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"Usage: start-surflet-server
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[-h DIR | --htdocs-dir=DIR] [-s DIR | --surflet-dir=DIR]
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[-i DIR | --images-dir=DIR] [-p NUM | --port=NUM]
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[-l FILE | --log-file-name=FILE] [-r NUM | --requests=NUM]
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[--help]
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with
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htdocs-dir directory of html files (default: ./web-server/root/htdocs)
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@ -39,104 +43,93 @@ exec scsh -lel sunet-2.1/load.scm -lel ssax/load.scm -dm -o surflet-server -e ma
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requests maximal amount of simultaneous requests (default 5)
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--help show this help
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NOTE: This is the SUrflet-server. It does not support cgi-bin.
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"
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))
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NOTE: This is the SUrflet-server. It does not support cgi-bin.~%"))
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(define htdocs-dir #f)
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(define images-dir #f)
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; (define cgi-bin-dir #f)
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(define port #f)
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(define log-file-name #f)
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(define root #f)
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(define surflet-dir #f)
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(define simultaneous-requests #f)
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(define (display-usage)
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(display (usage) (current-error-port))
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(exit 1))1
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(define (init)
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(set! htdocs-dir "root/htdocs")
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(set! images-dir "root/img")
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; (set! cgi-bin-dir "./web-server/root/cgi-bin")
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(set! port "8008")
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(set! log-file-name "httpd.log")
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(set! root "root")
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(set! surflet-dir "root/surflets")
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(set! simultaneous-requests "5"))
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(define default-options
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`((htdocs-dir . ,(absolute-file-name "root/htdocs"))
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(surflet-dir . ,(absolute-file-name "root/surflets"))
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(images-dir . ,(absolute-file-name "root/img"))
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(port . 8008)
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(log-file-name . ,(absolute-file-name "httpd.log"))
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(requests . 5)))
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(define (normalize-options)
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(set! htdocs-dir (absolute-file-name htdocs-dir))
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(set! images-dir (absolute-file-name images-dir))
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(set! log-file-name (absolute-file-name log-file-name))
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; (set! cgi-bin-dir (absolute-file-name cgi-bin-dir))
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(set! port (string->number port))
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(set! surflet-dir (absolute-file-name surflet-dir))
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(set! simultaneous-requests (string->number simultaneous-requests)))
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(define (raise-usage-error msg . info)
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(display msg (current-error-port))
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(display " --- " (current-error-port))
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(for-each
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(lambda (i)
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(display i (current-error-port))
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(display " " (current-error-port)))
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info)
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(display "\n" (current-error-port))
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(exit 1))
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(define get-options
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(let* ((unknown-option-error
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(lambda (option)
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(format (error-output-port)
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"unknown option `~A'~%try `surflet-server --help'~%"
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option)
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(exit 1)))
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(missing-argument-error
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(lambda (option)
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(format (error-output-port)
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"option `~A' requires an argument~%try `surflet-server --help'~%"
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option)
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(exit 1))))
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(lambda (options)
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(let loop ((options options))
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(if (null? options)
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(normalize-options)
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(cond
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((string=? (car options) "-h")
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(if (null? (cdr options))
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(missing-argument-error (car options))
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(set! htdocs-dir (cadr options)))
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(loop (cddr options)))
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((string=? (car options) "-i")
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(if (null? (cdr options))
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(missing-argument-error (car options))
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(set! images-dir (cadr options)))
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(loop (cddr options)))
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((string=? (car options) "-c")
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(format (error-output-port)
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"This is the SUrflet server. It does not support cgi.~%")
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; (if (null? (cdr options))
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; (missing-argument-error (car options))
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; (set! cgi-bin-dir (cadr options)))
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(loop (cddr options)))
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((string=? (car options) "-p")
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(if (null? (cdr options))
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(missing-argument-error (car options))
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(set! port (cadr options)))
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(loop (cddr options)))
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((string=? (car options) "-l")
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(if (null? (cdr options))
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(missing-argument-error (car options))
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(set! log-file-name (cadr options)))
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(loop (cddr options)))
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((string=? (car options) "-s")
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(if (null? (cdr options))
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(missing-argument-error (car options))
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(set! surflet-dir (cadr options)))
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(loop (cddr options)))
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((string=? (car options) "-r")
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(if (null? (cdr options))
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(missing-argument-error (car options))
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(set! simultaneous-requests (cadr options)))
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(loop (cddr options)))
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((string=? (car options) "--help")
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(display (usage))
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(exit 0))
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((string=? (car options) "--dump")
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(let ((image-name (if (null? (cdr options))
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"surflet-server"
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(cadr options))))
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(dump-scsh-program main image-name))
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(exit 0))
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(else
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(unknown-option-error (car options)))))))))
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(define (parse-arguments arg-list)
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(let ((number-option-proc
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(lambda (alist-key)
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(lambda (option name arg ops)
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(cond
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((not arg)
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(raise-usage-error "Option requires a number" name arg))
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((string->number arg)
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=> (lambda (n) (cons (cons alist-key n) ops)))
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(else
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(raise-usage-error "Not a number" arg))))))
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(absolute-file-option-proc
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(lambda (alist-key)
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(lambda (option name arg ops)
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(cons (cons alist-key
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(absolute-file-name arg)) ops)))))
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(let ((htdocs-dir-option
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(option '(#\h "htdocs-dir") #t #f
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(absolute-file-option-proc 'htdocs-dir)))
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(surflet-dir-option
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(option '(#\s "surflet-dir") #t #f
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(absolute-file-option-proc 'surflet-dir)))
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(images-dir-option
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(option '(#\i "images-dir") #t #f
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(absolute-file-option-proc 'images-dir)))
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(port-option
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(option '(#\p "port") #t #f
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(number-option-proc 'port)))
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(log-file-name-option
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(option '(#\l "log-file-name") #t #f
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(absolute-file-option-proc 'log-file-name)))
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(requests-option
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(option '(#\r "requests") #t #f
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(number-option-proc 'requests)))
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(help-option
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(option '(#f "help") #f #f
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(lambda (option name arg ops)
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(display-usage)))))
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(args-fold arg-list
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(list htdocs-dir-option surflet-dir-option
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images-dir-option port-option
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log-file-name-option requests-option
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help-option)
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(lambda (op name arg ops)
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(raise-usage-error
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"Unknown command line argument: " op))
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cons
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'()))))
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(define (make-options-from-args cmd-line-args)
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(let ((given (parse-arguments cmd-line-args)))
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(map (lambda (p)
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(or (assoc (car p) given) p))
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default-options)))
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(define (lookup-option alist option)
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(cond
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((assoc option alist)
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=> cdr)
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(else
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(error "Internal error, option not found" option alist))))
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(define (server . args)
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(if (pair? args)
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@ -145,15 +138,13 @@ exec scsh -lel sunet-2.1/load.scm -lel ssax/load.scm -dm -o surflet-server -e ma
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(define (main args)
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(with-cwd
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(file-name-directory (car (command-line)))
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(init)
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(format #t "reading options: ~s~%" (cdr args))
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(get-options (cdr args))
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(cond ((zero? (user-uid))
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(set-gid (->gid "nobody"))
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(set-uid (->uid "nobody"))))
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(file-name-directory (car (command-line)))
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(let ((options (make-options-from-args (cdr args))))
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(cond ((zero? (user-uid))
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(set-gid (->gid "nobody"))
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(set-uid (->uid "nobody"))))
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(format #t "Going to run SUrflet server with:
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(format #t "Going to run SUrflet server with:
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htdocs-dir: ~a
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surflet-dir: ~a
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images-dir: ~a
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@ -164,46 +155,44 @@ exec scsh -lel sunet-2.1/load.scm -lel ssax/load.scm -dm -o surflet-server -e ma
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NOTE: This is the SUrflet server. It does not support cgi.
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"
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htdocs-dir
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surflet-dir
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images-dir
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port
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log-file-name
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simultaneous-requests)
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(lookup-option options 'htdocs-dir)
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(lookup-option options 'surflet-dir)
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(lookup-option options 'images-dir)
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(lookup-option options 'port)
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(lookup-option options 'log-file-name)
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(lookup-option options 'requests))
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(httpd (make-httpd-options
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with-port port
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with-root-directory (cwd)
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with-simultaneous-requests simultaneous-requests
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with-syslog? #t
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with-log-file log-file-name
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;; The following settings are made to avoid dns lookups.
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with-reported-port port
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with-fqdn "localhost"
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with-resolve-ips? #f
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with-request-handler
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(alist-path-dispatcher
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(list (cons "h" (home-dir-handler "public_html"))
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; (cons "seval" seval-handler)
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; (cons "man" (rman-handler #f "man?%s(%s)"
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; "Generated by rman-gateway"))
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; (cons "info" (info-handler #f #f #f
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; "Generated by info-gateway"))
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; (cons "cgi-bin" (cgi-handler cgi-bin-dir))
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(cons "source" (rooted-file-or-directory-handler
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surflet-dir
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(with-file-name->content-type
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(lambda (file-name)
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(if (string-ci=? (file-name-extension file-name)
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".scm")
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"text/plain"))
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(make-file-directory-options))))
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(cons "img" (rooted-file-handler images-dir))
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(cons "surflet" (surflet-handler
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(with-surflet-path surflet-dir))))
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(rooted-file-or-directory-handler htdocs-dir))))
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))
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))
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(httpd
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(make-httpd-options
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with-port (lookup-option options 'port)
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with-root-directory (cwd)
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with-simultaneous-requests (lookup-option options 'requests)
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with-syslog? #t
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with-log-file (lookup-option options 'log-file-name)
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;; The following settings are made to avoid dns lookups.
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with-reported-port (lookup-option options 'port)
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with-fqdn "localhost"
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with-resolve-ips? #f
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with-request-handler
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(alist-path-dispatcher
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(list
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(cons "h" (home-dir-handler "public_html"))
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(cons "source" (rooted-file-or-directory-handler
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(lookup-option options 'surflet-dir)
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(with-file-name->content-type
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(lambda (file-name)
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(if (string-ci=?
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(file-name-extension file-name) ".scm")
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"text/plain"))
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(make-file-directory-options))))
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(cons "img" (rooted-file-handler
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(lookup-option options 'images-dir)))
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(cons "surflet" (surflet-handler
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(with-surflet-path
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(lookup-option options 'surflet-dir)))))
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(rooted-file-or-directory-handler
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(lookup-option options 'htdocs-dir))))))))
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))
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;; EOF
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;;; Local Variables:
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