Use args-fold (SRFI-37) for parsing command-line arguments
This commit is contained in:
eknauel
parent
7db04b74e2
commit
704ffae307
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@ -15,14 +15,18 @@ exec scsh -lel SSAX-4.9/load.scm -lel sunet-2.1/load.scm -dm -o http-test -e mai
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httpd-info-gateway
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let-opt
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scsh
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scheme)
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scheme
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srfi-37)
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(begin
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(define (usage)
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(format #f
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"Usage: start-extended-web-server [-h htdocs-dir] [-c cgi-bin-dir] [-p port]
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[-l log-file-name] [-r requests] [--help]
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"Usage: start-extended-web-server
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[-h DIR | --htdocs-dir=DIR] [-c DIR | --cgi-bin-dir=DIR ]
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[-l FILE | --log-file-name=FILE] [-r NUM | --requests=NUM]
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[-p NUM | --port=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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@ -32,96 +36,97 @@ exec scsh -lel SSAX-4.9/load.scm -lel sunet-2.1/load.scm -dm -o http-test -e mai
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(default: web-server/httpd.log)
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requests maximal amount of simultaneous requests (default 5)
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--help show this help
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"
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))
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"))
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(define htdocs-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 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))
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(define (init)
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(set! htdocs-dir "root/htdocs")
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(set! cgi-bin-dir "root/cgi-bin")
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(set! port "8080")
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(set! log-file-name "httpd.log")
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(set! root "root")
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(set! simultaneous-requests "5"))
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(define default-options
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`((htdocs-dir . ,(absolute-file-name "web-server/root/htdocs"))
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(cgi-bin-dir . ,(absolute-file-name "web-server/root/cgi-bin"))
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(port . 8080)
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(log-file-name . ,(absolute-file-name "web-server/httpd.log"))
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(requests . 5)))
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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 `start-web-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 `start-web-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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(begin
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(set! htdocs-dir (absolute-file-name htdocs-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! simultaneous-requests (string->number simultaneous-requests)))
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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) "-c")
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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) "-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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"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 (raise-usage-error msg . info)
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(display msg (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 (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-name-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-name-proc 'htdocs-dir)))
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(cgi-bin-dir-option
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(option '(#\c "cgi-bin-dir") #t #f
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(absolute-file-name-proc 'cgi-bin-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-name-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 cgi-bin-dir-option
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port-option log-file-name-option
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requests-option 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: " name))
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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 (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 Webserver with:
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(format #t "Going to run Webserver with:
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htdocs-dir: ~a
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cgi-bin-dir: ~a
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port: ~a
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@ -129,34 +134,36 @@ exec scsh -lel SSAX-4.9/load.scm -lel sunet-2.1/load.scm -dm -o http-test -e mai
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a maximum of ~a simultaneous requests, syslogging activated,
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and home-dir-handler (public_html) activated.
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"
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htdocs-dir
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cgi-bin-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 'cgi-bin-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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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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;; You may want to adapt this to your site.
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(cons "man" (rman-handler 'man
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'nroff
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"/usr/bin/rman"
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"/usr/bin/zcat"
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#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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(rooted-file-or-directory-handler htdocs-dir))))))
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))
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(httpd (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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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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;; You may want to adapt this to your site.
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(cons "man" (rman-handler 'man
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'nroff
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"/usr/bin/rman"
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"/usr/bin/zcat"
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#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
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(lookup-option options 'cgi-bin-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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200
start-web-server
200
start-web-server
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@ -11,91 +11,107 @@ exec scsh -lel SSAX-4.9/load.scm -lel sunet-2.1/load.scm -dm -o http-test -e mai
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httpd-file-directory-handlers
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httpd-cgi-handlers
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httpd-seval-handlers
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scheme-with-scsh)
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scheme-with-scsh
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srfi-37)
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(begin
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(define (usage)
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(format #f
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"Usage: start-web-server [-h htdocs-dir] [-c cgi-bin-dir] [-p port]
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[-l log-file-name] [--help]
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"Usage: start-web-server
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[-h DIR | --htdocs-dir=DIR] [-c DIR | --cgi-bin-dir=DIR]
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[-l FILE | --log-file-name=FILE] [-r NUM | --requests=NUM]
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[-p NUM | --port=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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cgi-bin-dir directory of cgi files (default: web-server/root/cgi-bin)
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port port server is listening to (default: 8080)
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log-file-name directory where to store the logfile in CLF
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(default: web-server/httpd.log)
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(default: web-server/httpd.log)
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--help show this help
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"
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))
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"))
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(define htdocs-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 (display-usage)
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(display (usage) (current-error-port))
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(exit 1))
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(define (init)
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(set! htdocs-dir "root/htdocs")
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(set! cgi-bin-dir "root/cgi-bin")
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(set! port "8080")
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(set! log-file-name "httpd.log")
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(set! root "root"))
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(define default-options
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`((htdocs-dir . ,(absolute-file-name "web-server/root/htdocs"))
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(cgi-bin-dir . ,(absolute-file-name "web-server/root/cgi-bin"))
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(port . 8080)
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(log-file-name . ,(absolute-file-name "web-server/httpd.log"))
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(requests . 5)))
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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 `start-web-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 `start-web-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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(begin
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(set! htdocs-dir (absolute-file-name htdocs-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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(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) "-c")
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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) "--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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"web-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 (raise-usage-error msg . info)
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(display msg (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 (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-name-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-name-proc 'htdocs-dir)))
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(cgi-bin-dir-option
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(option '(#\c "cgi-bin-dir") #t #f
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(absolute-file-name-proc 'cgi-bin-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-name-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 cgi-bin-dir-option
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port-option log-file-name-option
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requests-option 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: " name))
|
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cons
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'()))))
|
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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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|
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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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|
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(define (become-nobody-if-root)
|
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(cond ((zero? (user-uid))
|
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|
|
@ -104,37 +120,35 @@ exec scsh -lel SSAX-4.9/load.scm -lel sunet-2.1/load.scm -dm -o http-test -e mai
|
|||
|
||||
(define (main args)
|
||||
(with-cwd
|
||||
(file-name-directory (car (command-line)))
|
||||
(init)
|
||||
(format #t "reading options: ~s~%" (cdr args))
|
||||
(get-options (cdr args))
|
||||
(file-name-directory (car (command-line)))
|
||||
(let ((options (make-options-from-args (cdr args))))
|
||||
|
||||
(format #t "Going to run Webserver with:
|
||||
(format #t "Going to run Webserver with:
|
||||
htdocs-dir: ~a
|
||||
cgi-bin-dir: ~a
|
||||
port: ~a
|
||||
log-file-name: ~a
|
||||
syslogging activated.
|
||||
"
|
||||
htdocs-dir
|
||||
cgi-bin-dir
|
||||
port
|
||||
log-file-name)
|
||||
(lookup-option options 'htdocs-dir)
|
||||
(lookup-option options 'cgi-bin-dir)
|
||||
(lookup-option options 'port)
|
||||
(lookup-option options 'log-file-name))
|
||||
|
||||
(httpd (make-httpd-options
|
||||
with-port port
|
||||
with-root-directory (cwd)
|
||||
with-syslog? #t
|
||||
with-log-file log-file-name
|
||||
with-post-bind-thunk become-nobody-if-root
|
||||
with-request-handler
|
||||
(alist-path-dispatcher
|
||||
(list (cons "cgi-bin" (cgi-handler cgi-bin-dir))
|
||||
(cons "seval" seval-handler))
|
||||
(tilde-home-dir-handler "public_html"
|
||||
(rooted-file-or-directory-handler
|
||||
htdocs-dir)))))))
|
||||
))
|
||||
(httpd (make-httpd-options
|
||||
with-port (lookup-option options 'port)
|
||||
with-root-directory (cwd)
|
||||
with-syslog? #t
|
||||
with-log-file (lookup-option options 'log-file-name)
|
||||
with-post-bind-thunk become-nobody-if-root
|
||||
with-request-handler
|
||||
(alist-path-dispatcher
|
||||
(list (cons "cgi-bin" (cgi-handler (lookup-option options 'cgi-bin-dir)))
|
||||
(cons "seval" seval-handler))
|
||||
(tilde-home-dir-handler "public_html"
|
||||
(rooted-file-or-directory-handler
|
||||
(lookup-option options 'htdocs-dir)))))))))
|
||||
))
|
||||
;; EOF
|
||||
|
||||
;;; Local Variables:
|
||||
|
|
|
|||
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Reference in New Issue