9.9 Miscellaneous Utilities
There are a number of other miscellaneous utilities the Web Server needs. They are provided by "private/util.ss".
9.9.1 Contracts
Equivalent to (between/c 1 65535).
Equivalent to (or/c string? path? (symbols 'up 'same)).
9.9.2 Lists
(list-prefix? l r) → boolean? |
l : list? |
r : list? |
True if l is a prefix of r.
9.9.3 URLs
(url-replace-path proc u) → url? |
u : url? |
Replaces the URL path of u with proc of the former path.
(url-path->string url-path) → string? |
url-path : (listof path/param?) |
Formats url-path as a string with "/" as a delimiter and no params.
9.9.4 Paths
(explode-path* p) → (listof path-element?) |
p : path? |
Like normalize-path, but does not resolve symlinks.
(path-without-base base p) → (listof path-element?) |
base : path? |
p : path? |
Returns, as a list, the portion of p after base, assuming base is a prefix of p.
(directory-part p) → path? |
p : path? |
Returns the directory part of p, returning (current-directory) if it is relative.
(build-path-unless-absolute base p) → path? |
base : path-string? |
p : path-string? |
Prepends base to p, unless p is absolute.
(strip-prefix-ups p) → (listof path-element?) |
p : (listof path-element?) |
Removes all the prefix ".."s from p.
9.9.5 Exceptions
(pretty-print-invalid-xexpr exn v) → void |
exn : exn:invalid-xexpr? |
v : any/c |
Prints v as if it were almost an X-expression highlighting the error according to exn.
(network-error s fmt v ) → void |
s : symbol? |
fmt : string? |
v : any/c |
Like error, but throws a exn:fail:network.
(exn->string exn) → string? |
Formats exn with (error-display-handler) as a string.
9.9.6 Strings
(lowercase-symbol! sb) → symbol? |
Returns sb as a lowercase symbol.
(read/string s) → serializable? |
s : string? |
reads a value from s and returns it.
(write/string v) → string? |
v : serializable? |
writes v to a string and returns it.