package devkit
Development kit - general purpose library
Install
Dune Dependency
Authors
Maintainers
Sources
devkit-1.20240429.tbz
sha256=222f8ac131b1d970dab7eeb2714bfd6b9338b88b1082e6e01c136ae19e7eaef4
sha512=c9e6d93e3d21e5530c0f4d5baca51bf1f0a5d19248f8af7678d0665bb5cdf295d7aaaaa3e50eb2e44b8720e55097cc675af4dc8ec45acf9da39feb3eae1405d5
doc/src/devkit.ocamlnet_lite/netencoding.ml.html
Source file netencoding.ml
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module Url = struct (* adapted from https://gitlab.com/gerdstolpmann/lib-ocamlnet3/-/blob/4d1a8401bd40c17632128545e2aa4c880535e208/code/src/netstring/netencoding.ml#L993 *) let hex_digits = [| '0'; '1'; '2'; '3'; '4'; '5'; '6'; '7'; '8'; '9'; 'A'; 'B'; 'C'; 'D'; 'E'; 'F'; |] let to_hex2 k = (* Converts k to a 2-digit hex string *) let s = Bytes.create 2 in Bytes.set s 0 hex_digits.((k lsr 4) land 15); Bytes.set s 1 hex_digits.(k land 15); Bytes.unsafe_to_string s let of_hex1 c = match c with | '0' .. '9' -> Char.code c - Char.code '0' | 'A' .. 'F' -> Char.code c - Char.code 'A' + 10 | 'a' .. 'f' -> Char.code c - Char.code 'a' + 10 | _ -> raise Not_found let url_encoding_re = Netstring_str.regexp "[^A-Za-z0-9_.!*-]" let url_decoding_re = Netstring_str.regexp "\\+\\|%..\\|%.\\|%" let encode ?(plus = true) s = Netstring_str.global_substitute url_encoding_re (fun r _ -> match Netstring_str.matched_string r s with | " " when plus -> "+" | x -> let k = Char.code x.[0] in "%" ^ to_hex2 k) s let decode ?(plus = true) ?(pos = 0) ?len s = let s_l = String.length s in let s1 = if pos = 0 && len = None then s else let len = match len with Some n -> n | None -> s_l in String.sub s pos len in let l = String.length s1 in Netstring_str.global_substitute url_decoding_re (fun r _ -> match Netstring_str.matched_string r s1 with | "+" -> if plus then " " else "+" | _ -> ( let i = Netstring_str.match_beginning r in (* Assertion: s1.[i] = '%' *) if i + 2 >= l then failwith "Web.Url.decode"; let c1 = s1.[i + 1] in let c2 = s1.[i + 2] in try let k1 = of_hex1 c1 in let k2 = of_hex1 c2 in String.make 1 (Char.chr ((k1 lsl 4) lor k2)) with Not_found -> failwith "Web.Url.decode")) s1 let url_split_re = Netstring_str.regexp "[&=]" let dest_url_encoded_parameters parstr = let rec parse_after_amp tl = match tl with | Netstring_str.Text name :: Netstring_str.Delim "=" :: Netstring_str.Text value :: tl' -> (decode name, decode value) :: parse_next tl' | Netstring_str.Text name :: Netstring_str.Delim "=" :: Netstring_str.Delim "&" :: tl' -> (decode name, "") :: parse_after_amp tl' | [ Netstring_str.Text name; Netstring_str.Delim "=" ] -> [ (decode name, "") ] | _ -> failwith "Web.Url.dest_url_encoded_parameters" and parse_next tl = match tl with | [] -> [] | Netstring_str.Delim "&" :: tl' -> parse_after_amp tl' | _ -> failwith "Web.Url.dest_url_encoded_parameters" in let toklist = Netstring_str.full_split url_split_re parstr in match toklist with [] -> [] | _ -> parse_after_amp toklist end module Html = struct let etable = [ ("lt", 60); ("gt", 62); ("amp", 38); ("quot", 34); (* Note: " is new in HTML-4.0, but it has been widely used * much earlier. *) ("apos", 39); (* Only used if contained in unsafe_chars *) (* ISO-8859-1: *) ("nbsp", 160); ("iexcl", 161); ("cent", 162); ("pound", 163); ("curren", 164); ("yen", 165); ("brvbar", 166); ("sect", 167); ("uml", 168); ("copy", 169); ("ordf", 170); ("laquo", 171); ("not", 172); ("shy", 173); ("reg", 174); ("macr", 175); ("deg", 176); ("plusmn", 177); ("sup2", 178); ("sup3", 179); ("acute", 180); ("micro", 181); ("para", 182); ("middot", 183); ("cedil", 184); ("sup1", 185); ("ordm", 186); ("raquo", 187); ("frac14", 188); ("frac12", 189); ("frac34", 190); ("iquest", 191); ("Agrave", 192); ("Aacute", 193); ("Acirc", 194); ("Atilde", 195); ("Auml", 196); ("Aring", 197); ("AElig", 198); ("Ccedil", 199); ("Egrave", 200); ("Eacute", 201); ("Ecirc", 202); ("Euml", 203); ("Igrave", 204); ("Iacute", 205); ("Icirc", 206); ("Iuml", 207); ("ETH", 208); ("Ntilde", 209); ("Ograve", 210); ("Oacute", 211); ("Ocirc", 212); ("Otilde", 213); ("Ouml", 214); ("times", 215); ("Oslash", 216); ("Ugrave", 217); ("Uacute", 218); ("Ucirc", 219); ("Uuml", 220); ("Yacute", 221); ("THORN", 222); ("szlig", 223); ("agrave", 224); ("aacute", 225); ("acirc", 226); ("atilde", 227); ("auml", 228); ("aring", 229); ("aelig", 230); ("ccedil", 231); ("egrave", 232); ("eacute", 233); ("ecirc", 234); ("euml", 235); ("igrave", 236); ("iacute", 237); ("icirc", 238); ("iuml", 239); ("eth", 240); ("ntilde", 241); ("ograve", 242); ("oacute", 243); ("ocirc", 244); ("otilde", 245); ("ouml", 246); ("divide", 247); ("oslash", 248); ("ugrave", 249); ("uacute", 250); ("ucirc", 251); ("uuml", 252); ("yacute", 253); ("thorn", 254); ("yuml", 255); (* Other: *) ("fnof", 402); ("Alpha", 913); ("Beta", 914); ("Gamma", 915); ("Delta", 916); ("Epsilon", 917); ("Zeta", 918); ("Eta", 919); ("Theta", 920); ("Iota", 921); ("Kappa", 922); ("Lambda", 923); ("Mu", 924); ("Nu", 925); ("Xi", 926); ("Omicron", 927); ("Pi", 928); ("Rho", 929); ("Sigma", 931); ("Tau", 932); ("Upsilon", 933); ("Phi", 934); ("Chi", 935); ("Psi", 936); ("Omega", 937); ("alpha", 945); ("beta", 946); ("gamma", 947); ("delta", 948); ("epsilon", 949); ("zeta", 950); ("eta", 951); ("theta", 952); ("iota", 953); ("kappa", 954); ("lambda", 955); ("mu", 956); ("nu", 957); ("xi", 958); ("omicron", 959); ("pi", 960); ("rho", 961); ("sigmaf", 962); ("sigma", 963); ("tau", 964); ("upsilon", 965); ("phi", 966); ("chi", 967); ("psi", 968); ("omega", 969); ("thetasym", 977); ("upsih", 978); ("piv", 982); ("bull", 8226); ("hellip", 8230); ("prime", 8242); ("Prime", 8243); ("oline", 8254); ("frasl", 8260); ("weierp", 8472); ("image", 8465); ("real", 8476); ("trade", 8482); ("alefsym", 8501); ("larr", 8592); ("uarr", 8593); ("rarr", 8594); ("darr", 8595); ("harr", 8596); ("crarr", 8629); ("lArr", 8656); ("uArr", 8657); ("rArr", 8658); ("dArr", 8659); ("hArr", 8660); ("forall", 8704); ("part", 8706); ("exist", 8707); ("empty", 8709); ("nabla", 8711); ("isin", 8712); ("notin", 8713); ("ni", 8715); ("prod", 8719); ("sum", 8721); ("minus", 8722); ("lowast", 8727); ("radic", 8730); ("prop", 8733); ("infin", 8734); ("ang", 8736); ("and", 8743); ("or", 8744); ("cap", 8745); ("cup", 8746); ("int", 8747); ("there4", 8756); ("sim", 8764); ("cong", 8773); ("asymp", 8776); ("ne", 8800); ("equiv", 8801); ("le", 8804); ("ge", 8805); ("sub", 8834); ("sup", 8835); ("nsub", 8836); ("sube", 8838); ("supe", 8839); ("oplus", 8853); ("otimes", 8855); ("perp", 8869); ("sdot", 8901); ("lceil", 8968); ("rceil", 8969); ("lfloor", 8970); ("rfloor", 8971); ("lang", 9001); ("rang", 9002); ("loz", 9674); ("spades", 9824); ("clubs", 9827); ("hearts", 9829); ("diams", 9830); ("OElig", 338); ("oelig", 339); ("Scaron", 352); ("scaron", 353); ("Yuml", 376); ("circ", 710); ("tilde", 732); ("ensp", 8194); ("emsp", 8195); ("thinsp", 8201); ("zwnj", 8204); ("zwj", 8205); ("lrm", 8206); ("rlm", 8207); ("ndash", 8211); ("mdash", 8212); ("lsquo", 8216); ("rsquo", 8217); ("sbquo", 8218); ("ldquo", 8220); ("rdquo", 8221); ("bdquo", 8222); ("dagger", 8224); ("Dagger", 8225); ("permil", 8240); ("lsaquo", 8249); ("rsaquo", 8250); ("euro", 8364); ] let quick_etable_html = let ht = Hashtbl.create 50 in List.iter (fun (name, value) -> Hashtbl.add ht name value) etable; ht let quick_etable_xml = let ht = Hashtbl.create 5 in List.iter (fun name -> let value = List.assoc name etable in Hashtbl.add ht name value) [ "lt"; "gt"; "amp"; "quot"; "apos" ]; ht let rev_etable = (* Only code points 0 to 255: *) let a = Array.make 256 "" in List.iter (fun (name, value) -> if value <= 255 then a.(value) <- "&" ^ name ^ ";") etable; a let rev_etable_rest = (* Only code points >= 256: *) let ht = Hashtbl.create 150 in List.iter (fun (name, value) -> if value >= 256 then Hashtbl.add ht value ("&" ^ name ^ ";")) etable; ht let unsafe_chars_html4 = "<>\"&\000\001\002\003\004\005\006\007\008\011\012\014\015\016\017\018\019\020\021\022\023\024\025\026\027\028\029\030\031\127" let encode_poly ~in_enc ~in_ops ~out_kind ?(out_enc = `Enc_utf8) ?(prefer_name = true) ?(unsafe_chars = unsafe_chars_html4) () = (* This function implements the general case *) for i = 0 to String.length unsafe_chars - 1 do if Char.code unsafe_chars.[i] >= 128 then invalid_arg "Netencoding.Html.encode: non-ASCII character in unsafe_chars" done; (* Are there better implementations than the general one? *) (* Create the domain function: *) let dom_array = Array.make 128 true in let dom p = p >= 128 || dom_array.(p) in (* Set dom_array from unsafe_chars: *) for i = 0 to String.length unsafe_chars - 1 do let c = Char.code unsafe_chars.[i] in dom_array.(c) <- false done; (* Create the substitution function: *) let subst p = let name = if prefer_name then if p <= 255 then rev_etable.(p) else try Hashtbl.find rev_etable_rest p with Not_found -> "" else "" in if name = "" then "&#" ^ string_of_int p ^ ";" else name in (* Recode: *) fun s -> Netconversion.convert_poly ~in_ops ~out_kind ~subst ~in_enc ~out_enc:(`Enc_subset (out_enc, dom)) s let encode ~in_enc ?out_enc ?prefer_name ?unsafe_chars () = let in_ops = Netstring_tstring.string_ops in let out_kind = Netstring_tstring.String_kind in encode_poly ~in_enc ~in_ops ~out_kind ?out_enc ?prefer_name ?unsafe_chars () type entity_set = [ `Html | `Xml | `Empty ] let eref_re = Netstring_str.regexp "&\\(#\\([0-9]+\\);\\|#[xX]\\([0-9a-fA-F]+\\);\\|\\([a-zA-Z]+\\);\\)" let total_enc = (* every byte must have a corresponding Unicode code point, i.e. the * encoding must be "byte-total" *) function | _ -> false let hex_digit_of_char c = match c with | '0' .. '9' -> Char.code c - 48 | 'A' .. 'F' -> Char.code c - 55 | 'a' .. 'f' -> Char.code c - 87 | _ -> assert false let hex_of_string s = let n = ref 0 in for i = 0 to String.length s - 1 do let d = hex_digit_of_char s.[i] in n := (!n lsl 4) lor d done; !n let search_all re s pos = let rec search p acc = match try Some (Netstring_str.search_forward re s p) with Not_found -> None with | Some (k, r) -> search (k + 1) ((k, r) :: acc) | None -> List.rev acc in search pos [] let decode_half_poly ~in_enc ~out_kind ~out_enc ?(lookup = fun name -> failwith ("Netencoding.Html.decode: Unknown entity `" ^ name ^ "'")) ?(subst = fun p -> failwith ("Netencoding.Html.decode: Character cannot be represented: " ^ string_of_int p)) ?(entity_base = (`Html : entity_set)) () = (* makechar: *) let raw_makechar = Netconversion.makechar out_enc in let makechar p = try raw_makechar p with Not_found -> subst p in (* Entity lookup: *) let lookup_entity = match entity_base with | `Html | `Xml -> ( let ht = if entity_base = `Html then quick_etable_html else quick_etable_xml in fun name -> try makechar (Hashtbl.find ht name) with Not_found -> lookup name) | `Empty -> lookup in (* Recode strings: *) let recode_str = if total_enc in_enc && in_enc = out_enc then fun s pos len -> if pos = 0 && len = String.length s then s else String.sub s pos len else fun s range_pos range_len -> Netconversion.convert ~in_enc ~out_enc ~subst ~range_pos ~range_len s in fun s -> (* Find all occurrences of &name; or &#num; or &#xnum; *) let occurrences = search_all eref_re s 0 in (* Collect the resulting string in a buffer *) let buf = Netbuffer.create 250 in let n = ref 0 in List.iter (fun (n0, r) -> let n1 = Netstring_str.match_end r in if n0 > !n then Netbuffer.add_string buf (recode_str s !n (n0 - !n)); let replacement = let num = try Netstring_str.matched_group r 2 s with Not_found -> "" in (* Note: Older versions of Pcre return "" when the substring * did not match, newer versions raise Not_found *) if num <> "" then let n = int_of_string num in makechar n else let xnum = try Netstring_str.matched_group r 3 s with Not_found -> "" in (* Note: Older versions of Pcre return "" when the substring * did not match, newer versions raise Not_found *) if xnum <> "" then let n = hex_of_string xnum in makechar n else let name = try Netstring_str.matched_group r 4 s with Not_found -> "" in (* Note: Older versions of Pcre return "" when the substring * did not match, newer versions raise Not_found *) assert (name <> ""); lookup_entity name in Netbuffer.add_string buf replacement; n := n1) occurrences; let n0 = String.length s in if n0 > !n then Netbuffer.add_string buf (recode_str s !n (n0 - !n)); (* Return *) Netbuffer.to_tstring_poly buf out_kind let decode ~in_enc ~out_enc ?lookup ?subst ?entity_base () = let out_kind = Netstring_tstring.String_kind in decode_half_poly ~in_enc ~out_kind ~out_enc ?lookup ?subst ?entity_base () end
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