3.6.9 Miscellaneous Utilities
| (require web-server/private/util) |
There are a number of other miscellaneous utilities the Web Server needs. They are provided by "private/util.ss".
3.6.9.1 Contracts
| port-number? : contract? |
Equivalent to (between/c 1 65535).
| path-element? : contract? |
Equivalent to (or/c string? path? (symbols 'up 'same)).
3.6.9.2 Lists
| (list-prefix? l r) → boolean? |
| l : list? |
| r : list? |
True if l is a prefix of r.
3.6.9.3 URLs
| (url-replace-path proc u) → url? |
| proc : ((listof path/param?) . -> . (listof path/param?)) |
| 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.
3.6.9.4 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.
3.6.9.5 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? |
| exn : (or/c exn? any/c) |
Formats exn with (error-display-handler) as a string.
3.6.9.6 Strings
| (lowercase-symbol! sb) → symbol? |
| sb : (or/c string? bytes?) |
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.
3.6.9.7 Bytes
| (read/bytes b) → serializable? |
| b : bytes? |
reads a value from b and returns it.
| (write/bytes v) → bytes? |
| v : serializable? |
writes v to a bytes and returns it.