package async_smtp
SMTP client and server
Install
Dune Dependency
Authors
Maintainers
Sources
async_smtp-v0.15.0.tar.gz
sha256=41e265c2d1cd7cde23235d4bb3692226be7d159e4c82e976e68e838b910865d6
doc/src/async_smtp.tools/headers.ml.html
Source file headers.ml
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260
open Core open Async_smtp_types module Envelope = Smtp_envelope module Crypto = Crypto.Cryptokit module Hash = Crypto.Hash module Config = struct module Header_cond = struct type t = { name : Email_headers.Stable.Name.V1.t ; if_ : [ `Contains of string ] option [@sexp.option] } [@@deriving sexp] end module Listed_header_cond = struct type t = { name : Email_headers.Stable.Name.V1.t ; if_ : [ `Contains of string ] option [@sexp.option] ; remove_duplicates : unit option [@sexp.option] } [@@deriving sexp] end type t = { strip_whitespace : unit option [@sexp.option] ; normalize_whitespace : Header_cond.t list [@sexp.list] ; filter : Header_cond.t list [@sexp.list] ; mask : Header_cond.t list [@sexp.list] ; hash : Header_cond.t list [@sexp.list] ; dedup : Header_cond.t list [@sexp.list] ; sort_emails : Listed_header_cond.t list [@sexp.list] ; sort_words : Listed_header_cond.t list [@sexp.list] ; sort : bool [@sexp.bool] } [@@deriving sexp] let default = { strip_whitespace = None ; normalize_whitespace = [] ; filter = [] ; mask = [] ; hash = [] ; dedup = [] ; sort_emails = [] ; sort_words = [] ; sort = false } ;; let load file = Async.Reader.load_sexp_exn file t_of_sexp end module Header = struct type t = Email_headers.Name.t * string [@@deriving compare] end let match_header conds = let conds = List.fold conds ~init:Email_headers.Name.Map.empty ~f:(fun acc { Config.Header_cond.name; if_ } -> let cond ~name:other ~value:_ = Email_headers.Name.equal name other in let cond = match if_ with | None -> cond | Some (`Contains s) -> let re = Re2.escape s |> Re2.create_exn in fun ~name ~value -> cond ~name ~value && Re2.matches re value in Map.add_multi acc ~key:name ~data:cond) in fun ~name ~value -> match Map.find conds name with | Some conds -> List.exists conds ~f:(fun cond -> cond ~name ~value) | None -> false ;; let match_listed_header conds = let conds = List.fold conds ~init:Email_headers.Name.Map.empty ~f:(fun acc { Config.Listed_header_cond.name; if_; remove_duplicates } -> let cond ~name:other ~value:_ = Email_headers.Name.equal name other in let cond = match if_ with | None -> cond | Some (`Contains s) -> let re = Re2.escape s |> Re2.create_exn in fun ~name ~value -> cond ~name ~value && Re2.matches re value in Map.add_multi acc ~key:name ~data:(cond, remove_duplicates)) in fun ~name ~value -> match Map.find conds name with | None -> None | Some conds -> List.find_map conds ~f:(fun (cond, remove_duplicates) -> if cond ~name ~value then Some remove_duplicates else None) ;; let strip_whitespace_headers = Envelope.map_headers ~normalize:`None ~f:(fun ~name:_ ~value -> Email_headers.Value.to_string ~normalize:`Whitespace value) ;; let normalize_whitespace s = let replace pattern replacement s = let regex = Re2.create_exn pattern in Re2.replace_exn regex s ~f:(fun _m -> replacement) in let merge_spaces s = replace "\\s\\s*" " " s in let normalize_commas s = replace "\\s*,\\s*" ", " s in merge_spaces s |> normalize_commas |> String.strip ;; let%expect_test _ = let test s = printf "%S\n" (normalize_whitespace s) in test ""; [%expect {|""|}]; test " "; [%expect {|""|}]; test "a b c d, e, f, g"; [%expect {|"a b c d, e, f, g"|}]; test " a b c\n d, e \r , \n f,g \n "; [%expect {|"a b c d, e, f, g"|}] ;; let normalize_whitespace_headers cond = let cond = match_header cond in Envelope.map_headers ~normalize:`None ~f:(fun ~name ~value -> if cond ~name ~value then normalize_whitespace value else value) ;; let filter_headers cond = let cond = match_header cond in Envelope.filter_headers ~f:(fun ~name ~value -> not (cond ~name ~value)) ;; let hash_headers cond = let hash data = data |> Crypto.hash_string (Hash.sha256 ()) |> Util.Hex.to_hex |> sprintf "[hidden : sha256 = %s]" in let cond = match_header cond in Envelope.map_headers ~normalize:`None ~f:(fun ~name ~value -> if cond ~name ~value then hash value else value) ;; let mask_headers cond = let cond = match_header cond in Envelope.map_headers ~normalize:`None ~f:(fun ~name ~value -> if cond ~name ~value then "XXX" else value) ;; let sort_emails_in_header pattern = let f ~remove_duplicates value = let remove_duplicates = Option.is_some remove_duplicates in List.sort value ~compare:Email_address.compare |> (fun l -> if remove_duplicates then List.remove_consecutive_duplicates l ~equal:Email_address.equal else l) |> List.map ~f:Email_address.to_string in Envelope.map_headers ~normalize:`None ~f:(fun ~name ~value -> match match_listed_header pattern ~name ~value with | None -> value | Some remove_duplicates -> (match Email_address.list_of_string value with | Error e -> (* Not an error since this is not a reason to trigger the kill switch. *) Async.Log.Global.info "could not parse %s: %s" value (Error.to_string_hum e); value | Ok emails -> f ~remove_duplicates emails |> String.concat ~sep:", ")) ;; let sort_words_in_header pattern = let f ~remove_duplicates value = let remove_duplicates = Option.is_some remove_duplicates in String.split value ~on:' ' |> List.filter ~f:(fun s -> not (String.is_empty s)) |> List.sort ~compare:String.compare |> (fun l -> if remove_duplicates then List.remove_consecutive_duplicates l ~equal:String.equal else l) |> String.concat ~sep:" " in Envelope.map_headers ~normalize:`None ~f:(fun ~name ~value -> match match_listed_header pattern ~name ~value with | None -> value | Some remove_duplicates -> f ~remove_duplicates value) ;; let sort_headers = Envelope.modify_headers ~f:(fun headers -> Email_headers.to_list ~normalize:`None headers |> List.stable_sort ~compare:Header.compare |> Email_headers.of_list ~normalize:`None) ;; let sort_envelope_recipients message = let recipients = Envelope.recipients message |> List.stable_sort ~compare:Email_address.compare in Envelope.set message ~recipients () ;; let dedup_headers conds = let equal (name1, value1) (name2, value2) = if match_header conds ~name:name1 ~value:value1 && match_header conds ~name:name2 ~value:value2 then Email_headers.Name.equal name1 name2 else false in Envelope.modify_headers ~f:(fun headers -> Email_headers.to_list ~normalize:`None headers |> List.remove_consecutive_duplicates ~equal |> Email_headers.of_list ~normalize:`None) ;; let transform { Config.strip_whitespace ; normalize_whitespace ; filter ; sort ; dedup ; hash ; mask ; sort_emails ; sort_words } message = let maybe_sort message = if not sort then message else message |> sort_headers |> sort_envelope_recipients in let message = match strip_whitespace with | None -> message | Some () -> strip_whitespace_headers message in normalize_whitespace_headers normalize_whitespace message |> filter_headers filter (* Sorting twice since we want to dedup before masking, to sort before deduping, and to sort after masking. *) |> maybe_sort |> dedup_headers dedup |> hash_headers hash |> mask_headers mask |> sort_emails_in_header sort_emails |> sort_words_in_header sort_words |> maybe_sort ;;
sectionYPositions = computeSectionYPositions($el), 10)"
x-init="setTimeout(() => sectionYPositions = computeSectionYPositions($el), 10)"
>