29 lines
887 B
Common Lisp
29 lines
887 B
Common Lisp
;;;; fetch-gzipped.lisp
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(in-package #:quicklisp-client)
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(defun gzipped-url (url)
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(check-type url string)
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(concatenate 'string url ".gz"))
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(defun fetch-gzipped-version (url file &key quietly)
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(let ((gzipped (gzipped-url url))
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(gzipped-temp (merge-pathnames "gzipped.tmp" file)))
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(fetch gzipped gzipped-temp :quietly quietly)
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(gunzip gzipped-temp file)
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(delete-file-if-exists gzipped-temp)
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(probe-file file)))
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(defun url-not-suitable-error-p (condition)
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(<= 400 (unexpected-http-status-code condition) 499))
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(defun maybe-fetch-gzipped (url file &key quietly)
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(handler-case
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(fetch-gzipped-version url file :quietly quietly)
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(unexpected-http-status (condition)
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(cond ((url-not-suitable-error-p condition)
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(fetch url file :quietly quietly)
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(probe-file file))
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(t
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(error condition))))))
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