Parse full request, including headers and body

This commit is contained in:
xenia 2023-09-07 15:18:42 +02:00
parent 2caca85e6f
commit 7e87f2c8fb
9 changed files with 410 additions and 151 deletions

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@ -72,6 +72,12 @@ instance
EqString : Eq Data.String.String
EqString ._==_ a b = a Data.String.== b
EqMaybe : {T : Type} Eq T Eq (Maybe T)
EqMaybe ._==_ (real a) (real b) = a == b
EqMaybe ._==_ cake cake = true
EqMaybe ._==_ (real _) cake = false
EqMaybe ._==_ cake (real _) = false
record Show (T : Type) : Type₁ where
field
show : T String.String

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@ -33,15 +33,61 @@ module bytes where
PERCENT = < 37 >
BIG = < 0xff >
private
import Data.String as String
import Data.Fin as Fin
import Data.Char as Char
toHexDigit : String.String
toHexDigit 0 = "0"
toHexDigit 1 = "1"
toHexDigit 2 = "2"
toHexDigit 3 = "3"
toHexDigit 4 = "4"
toHexDigit 5 = "5"
toHexDigit 6 = "6"
toHexDigit 7 = "7"
toHexDigit 8 = "8"
toHexDigit 9 = "9"
toHexDigit 10 = "a"
toHexDigit 11 = "b"
toHexDigit 12 = "c"
toHexDigit 13 = "d"
toHexDigit 14 = "e"
toHexDigit 15 = "f"
toHexDigit x = "?"
toHex : String.String
toHex n = toHexDigit (DivMod.quotient divmod) String.++ toHexDigit (Fin.to (DivMod.remainder divmod))
where
divmod : DivMod n 16
divmod = n divMod 16
instance
EqByte : Eq Byte
EqByte ._==_ a b = a .value == b .value
ShowByte : Show Byte
ShowByte .show x = "< " String.++ show (x .value) String.++ " >"
ShowByte .show x =
if (0x20 ≤ᵇ x .value) (x .value <ᵇ 0x7f) not (x .value == 0x60)
then "`" String.++ String.fromChar (Char.from (x .value)) String.++ "`"
else "<" String.++ toHex (x .value) String.++ ">"
where
import Data.String as String
import Data.List as List
ShowByteList : Show (List.List Byte)
ShowByteList .show xs = "'" String.++ show-inner xs String.++ "'"
where
show-inner : List.List Byte String.String
show-inner List.[] = ""
show-inner (x List.∷ xs) =
if (0x20 ≤ᵇ x .value) (x .value <ᵇ 0x7f)
then String.fromChar (Char.from (x .value)) String.++ show-inner xs
else "\\x" String.++ toHex (x .value) String.++ show-inner xs
mkClip : Byte
mkClip v = case v <? 256 of λ where
(yes v<256) record { value = v ; in-range = v<256 }

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@ -11,29 +11,57 @@ open L using (List)
open import Data.Product using (_×_; proj₁; proj₂) renaming (_,_ to _,,,_)
open import Data.Nat hiding (_<_; _>_)
open import Data.Unit using (; tt)
open import Data.Bool
open import Base
open import Bits-and-Bytes using (Byte)
open import Bits-and-Bytes using (Byte; ShowByteList)
open import SysIO
open import Socket
open import Indexed
open import Parsing (Byte)
open import NonEmpty
open import Parse-HTTP hiding (_/_)
open import HTML
open import Parse-HTTP
open import Parse-HTTP.URL hiding (_/_)
open import Parse-HTTP.Methods
import HTML
import UTF-8
200-ok : S.String List Byte List Byte
200-ok content-type response-data = UTF-8.encode-string (S.toList (headers S.++ "\r\n\r\n")) L.++ response-data
response-with-content : S.String String List Byte List Byte
response-with-content status-code status content-type response-data =
UTF-8.encode-string (S.toList (status-line S.++ "\r\n" S.++ headers-lines S.++ "\r\n")) L.++ response-data
where
headers : String
headers = "HTTP/1.1 200 OK\r\nContent-Type: " S.++ content-type S.++ "; charset=utf-8\r\nContent-Length: " S.++ (show (L.length response-data))
status-line : String
status-line = "HTTP/1.1 " S.++ show status-code S.++ " " S.++ status
response-headers : List String
response-headers =
("Content-Type: " S.++ content-type S.++ "; charset=utf-8")
L.∷ ("Content-Length: " S.++ (show (L.length response-data)))
L.∷ L.[]
headers-lines : String
headers-lines = L.foldr (λ hdr rest hdr S.++ "\r\n" S.++ rest) "" response-headers
response-without-content : S.String List Byte
response-without-content status-code status =
UTF-8.encode-string (S.toList (
"HTTP/1.1 " S.++ show status-code S.++ " " S.++ status S.++ "\r\n\r\n"
))
200-ok : S.String List Byte List Byte
200-ok content-type response-data = response-with-content 200 "OK" content-type response-data
400-bad-request : List Byte
400-bad-request = UTF-8.encode-string (S.toList "400 Bad Request\r\n\r\n")
400-bad-request = response-without-content 400 "Bad Request"
render-page : (Path × Maybe String) DOM
render-page (path ,,, mquery) =
404-not-found : List Byte
404-not-found = response-with-content 404 "Not Found" "text/plain" (UTF-8.encode-string (S.toList "3: could not find the resource :("))
module Pages where
open HTML
render-index : Maybe S.String HTML.DOM
render-index query =
< html & lang "en" , style "color: yellow; background: black; padding: 1em;" >
< head >
< title > "Test page in Agda" </ title > ,
@ -43,34 +71,45 @@ render-page (path ,,, mquery) =
< body >
< h 1 > "hi" </ h 1 > ,
< p >
"you requested " ,
< span & style "color: white;" > show path </ span > ,
((λ q < span & style "color: fuchsia;" > "?" , q </ span >) <$> mquery or-else L.[])
"welcome to the " ,
< span & style "color: white;" > "index" </ span > ,
((λ q < span & style "color: fuchsia;" > " (query = " , q , ")" </ span >) <$> query or-else L.[])
</ p >
</ body >
</ html >
handle-request : (Path × Maybe String) IO (List Byte)
handle-request : Request IO (List Byte)
handle-request req =
pure (
if (req .target .path) == ("index.html" / $)
then pure (
200-ok
"text/html"
(UTF-8.encode-string (S.toList (
render-dom (render-page req)
HTML.render-dom (Pages.render-index (req .target .query))
)))
)
else pure 404-not-found
where
open Request using (target)
open import Parse-HTTP.URL
handle : Socket IO (List Byte)
handle sock = do
putStrLn "handle: new connection‼"
let got = get-bytes sock
let parsed = parse-get-request .parse (V.fromList got)
case parsed of λ where
(real req@(path ,,, mquery) , _ , _ )
case parse-request .parse (V.fromList got) of λ where
(real req , _ , _ )
(do
putStrLn ("handle: path = " S.++ show path S.++ ", query = " S.++ mquery or-else "(no query)")
putStrLn "handle: got request"
putStrLn (" method = " S.++ show (req .method))
putStrLn (" target .path = " S.++ show (req .target .path) S.++ (λ q ", target .query = " S.++ show q) <$> (req .target .query) or-else "")
putStrLn (" version = " S.++ show (req .version))
putStrLn (" headers = " S.++ show (req .headers))
case req .content of λ where
(real c) putStrLn (" content = " S.++ show ShowByteList c)
cake putStrLn " no content"
handle-request req
)
cake
@ -78,6 +117,8 @@ handle sock = do
putStrLn "Got an invalid request"
pure 400-bad-request
)
where
open Request
run-port :
run-port = 1337

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@ -1,10 +1,14 @@
module NonEmpty where
open import Data.List using (List; []; _∷_)
open import Agda.Primitive renaming (Set to Type)
open import Data.Product
open import Data.Nat
open import Data.List using (List; []; _∷_)
import Data.Vec as V
open import Base
module NonEmpty where
data List⁺ (A : Type) : Type where
[_]⁺ : A List⁺ A
_∷⁺_ : A List⁺ A List⁺ A
@ -23,6 +27,14 @@ list⁺-to-list : {A : Type} → List⁺ A → List A
list⁺-to-list [ x ]⁺ = x []
list⁺-to-list (x ∷⁺ xs) = x list⁺-to-list xs
list⁺-to-vec : {A : Type} List⁺ A Σ λ n V.Vec A (suc n)
list⁺-to-vec [ x ]⁺ = 0 , x V.∷ V.[]
list⁺-to-vec (x ∷⁺ xs) = _ , x V.∷ (proj₂ (list⁺-to-vec xs))
vec-to-list⁺ : {A : Type} {n : } V.Vec A (suc n) List⁺ A
vec-to-list⁺ (x V.∷ V.[]) = [ x ]⁺
vec-to-list⁺ (x V.∷ xs@(_ V.∷ _)) = x ∷⁺ vec-to-list⁺ xs
instance
ShowList⁺ : {A : Type} Show A Show (List⁺ A)
ShowList⁺ .show x = show (list⁺-to-list x) String.++ ""

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@ -19,104 +19,20 @@ open import Bits-and-Bytes
import UTF-8
open import Parsing (Byte)
open import Parse-HTTP.Methods
open import Parse-HTTP.Helpers
module Parse-HTTP where
-- HTTP Method: GET, POST, etc.
data HTTP-Method : Type where
GET HEAD POST PUT DELETE CONNECT OPTIONS TRACE PATCH : HTTP-Method
instance
ShowMethod : Show HTTP-Method
ShowMethod .show x = go x
where
go : HTTP-Method String.String
go GET = "GET"
go HEAD = "HEAD"
go POST = "POST"
go PUT = "PUT"
go DELETE = "DELETE"
go CONNECT = "CONNECT"
go OPTIONS = "OPTIONS"
go TRACE = "TRACE"
go PATCH = "PATCH"
name-of-enc : HTTP-Method Σ λ n Vec Byte (suc n)
name-of-enc GET = _ , < 71 > < 69 > < 84 > []
name-of-enc HEAD = _ , < 72 > < 69 > < 65 > < 68 > []
name-of-enc POST = _ , < 80 > < 79 > < 83 > < 84 > []
name-of-enc PUT = _ , < 80 > < 85 > < 84 > []
name-of-enc DELETE = _ , < 68 > < 69 > < 76 > < 69 > < 84 > < 69 > []
name-of-enc CONNECT = _ , < 67 > < 79 > < 78 > < 78 > < 69 > < 67 > < 84 > []
name-of-enc OPTIONS = _ , < 79 > < 80 > < 84 > < 73 > < 79 > < 78 > < 83 > []
name-of-enc TRACE = _ , < 84 > < 82 > < 65 > < 67 > < 69 > []
name-of-enc PATCH = _ , < 80 > < 65 > < 84 > < 67 > < 72 > []
http-methods : List⁺ HTTP-Method
http-methods = GET ∷⁺ HEAD ∷⁺ POST ∷⁺ PUT ∷⁺ DELETE ∷⁺ CONNECT ∷⁺ OPTIONS ∷⁺ TRACE ∷⁺ [ PATCH ]⁺
parse-specific-http-method : HTTP-Method [ Parser HTTP-Method ]
parse-specific-http-method m = (λ _ m) <$> exact name
where
name-len :
name-len = proj₁ (name-of-enc m)
name : Vec Byte (suc name-len)
name = proj₂ (name-of-enc m)
parse-name : [ Parser ]
parse-name = exact name
parse-http-method : [ Parser HTTP-Method ]
parse-http-method = foldl (λ p m p <|> (parse-specific-http-method m)) fail http-methods
module Parse-URL where
record Authority : Type where
constructor __
field
host : String.String -- TODO: Split out IP:s as a separate type?
port :
-- TODO: maybe include {port-in-range} : port < 2 ^ 16
open Authority public
infix 10 __
data Path : Type where
$ : Path -- end
_/_ : String.String Path Path
open Path public
instance
ShowPath : Show Path
ShowPath .show $ = "(empty path)"
ShowPath .show (p / $) = p
ShowPath .show (p / rest@(_ / _)) = p String.++ "/" String.++ show rest
infixr 5 _/_
record URL : Type where
constructor http://_/_¿_#_
field
authority : Authority
path : Path
query : Maybe String.String
fragment : Maybe String.String
open URL public
infix 0 http://_/_¿_#_
private
sample-url : URL
sample-url = http:// "coral.shoes" 80 / ("pages" / "index.html" / $) ¿ real "key=value" # cake
-- helper functions
private
decode-utf8⁺ : List⁺ Byte Maybe String.String
decode-utf8⁺ bs = String.fromList <$> UTF-8.decode-string (list⁺-to-list bs)
module Parse-URL where
open import Parse-HTTP.URL
-- commonly used sub-parsers
private
gen-delims sub-delims reserved unreserved : [ Parser Byte ]
@ -151,8 +67,14 @@ module Parse-URL where
parse-query = decode-utf8⁺ <$?> many (pchar <|> any-of "/?")
parse-fragment = parse-query
parse-path-and-query : [ Parser (Path × Maybe String.String) ]
parse-path-and-query = parse-path <&?>□ (any-of "?" <&⃗>□ parse-query)
record RequestTarget : Type where
field
path : Path
query : Maybe String.String
open RequestTarget public
parse-request-target : [ Parser RequestTarget ]
parse-request-target = (λ (path , mquery) record { path = path ; query = mquery }) <$> (parse-path <&?>□ (any-of "?" <&⃗>□ parse-query))
parse-url : [ Parser URL ]
parse-url = enurl <$?> parse-parts
@ -165,21 +87,120 @@ module Parse-URL where
parse-parts : [ Parser (String.String × Authority × (Path × Maybe String.String) × Maybe String.String) ]
parse-parts =
parse-scheme <&>□
(any-of ":" <&>□ repeat 2 (any-of "/")) <&⃗>□
parse-authority <&>□
(parse-path <&?>□ (any-of "?" <&⃗>□ parse-query))
parse-scheme
<&>□ (any-of ":" <&>□ repeat 2 (any-of "/"))
<&⃗>□ parse-authority
<&>□ (parse-path <&?>□ (any-of "?" <&⃗>□ parse-query))
<&?>□ (any-of "#" <&⃗>□ parse-fragment)
open Parse-URL public
parse-http-version : [ Parser ]
parse-http-version = (λ _ tt) <$> (exact (< 72 > < 84 > < 84 > < 80 > < 47 > []) <&>□ many (digit <|> any-of "."))
module Parse-Header where
record Header : Type where
field
name : List⁺ Byte
value : List⁺ Byte
open Header
parse-get-request : [ Parser (Path × Maybe String.String) ]
parse-get-request =
parse-specific-http-method GET <&⃗>□
spaces <&⃗>□
parse-path-and-query <&⃖>□
spaces <&>□
parse-http-version
instance
ShowHeader : Show Header
ShowHeader .show hdr = show ShowByteList (list⁺-to-list (hdr .name)) String.++ ": " String.++ show ShowByteList (list⁺-to-list (hdr .value))
content-length : List.List Header Maybe
content-length List.[] = cake
content-length (hdr List.∷ rest) =
if decode-utf8⁺ (hdr .name) == real "Content-Length"
then (λ x x .result) <$> (number .parse (proj₂ (list⁺-to-vec (hdr .value))))
else content-length rest
private
parse-vchar-sp : [ Parser Byte ]
parse-vchar-sp = (λ x (0x20 ≤ᵇ x .value) (x .value ≤ᵇ 0x7e)) <?> any₁
parse-token : [ Parser (List⁺ Byte) ]
parse-token = many parse-tchar
where
parse-tchar : [ Parser Byte ]
parse-tchar = digit <|> letter <|> any-of "!#$%&'*+-.^_`|~"
parse-field-content : [ Parser (List⁺ Byte) ]
parse-field-content = many parse-vchar-sp
parse-header : [ Parser Header ]
parse-header =
(λ (name , value) record { name = name ; value = value })
<$> (
parse-token
<&>□ any-of ":"
<&⃗>□ spaces
<&⃗>□ parse-field-content
)
parse-headers⁺ : [ Parser (List⁺ Header) ]
parse-headers⁺ = many parse-header
open Parse-Header public
module Parse-Request where
data HTTP-Version : Type where
HTTP11 : HTTP-Version -- we only support 1.1
instance
ShowHTTP-Version : Show HTTP-Version
ShowHTTP-Version .show HTTP11 = "HTTP/1.1"
parse-http-version : [ Parser HTTP-Version ]
parse-http-version = (λ _ HTTP11) <$> exact (string-to-ascii "HTTP/1.1")
parse-specific-http-method : HTTP-Method [ Parser HTTP-Method ]
parse-specific-http-method m = (λ _ m) <$> exact (proj₂ (list⁺-to-vec (name-of-method m)))
parse-http-method : [ Parser HTTP-Method ]
parse-http-method = foldr (λ m p parse-specific-http-method m <|> p) fail http-methods
parse-request-line : [ Parser (HTTP-Method × RequestTarget × HTTP-Version) ]
parse-request-line =
parse-http-method
<&>□ (
spaces
<&⃗>□ (
parse-request-target
<&>□ (
spaces
<&⃗>□ parse-http-version
)
)
)
record Request : Type where
field
method : HTTP-Method
target : RequestTarget
version : HTTP-Version
headers : List.List Header
content : Maybe (List.List Byte)
parse-request : [ Parser Request ]
parse-request =
((parse-request-line <&⃖>□ crlf) <&>□ many (parse-header <&⃖>□ crlf))
>>= λ ((method , target , version) , headers) enbox (
case content-length (list⁺-to-list headers) of λ where
cake
(
(λ _ record { method = method; target = target; version = version; headers = list⁺-to-list headers; content = cake })
<$> crlf
)
(real 0)
(
(λ _ record { method = method; target = target; version = version; headers = list⁺-to-list headers; content = real List.[] })
<$> (crlf <&>□ crlf)
)
(real n@(suc _))
(
(λ content record { method = method; target = target; version = version; headers = list⁺-to-list headers; content = real (toList content) })
<$> (crlf <&⃗>□ (repeat n any₁))
)
)
open Parse-Request public

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@ -5,6 +5,7 @@ open import Data.Bool hiding (_<_)
open import Data.Unit
open import Data.Vec hiding ([_]; foldl)
import Data.List as List
open import Data.Product
import Data.String as String
import Data.Char as Char
@ -27,6 +28,20 @@ x is c = x .value == Char.to c
_between_and_ : Byte Char.Char Char.Char Bool
x between a and b = (Char.to a ≤ᵇ x .value) (x .value ≤ᵇ Char.to b)
list-is-ascii : List.List Char.Char Bool
list-is-ascii List.[] = true
list-is-ascii (c List.∷ chs) = (Char.to c <ᵇ 128) list-is-ascii chs
string-is-ascii : String.String Type
string-is-ascii x = T (list-is-ascii (String.toList x))
string-to-ascii : (s : String.String) {string-is-ascii s} Vec Byte (String.length s)
string-to-ascii x {prf} = go (String.toList x)
where
go : (l : List.List Char.Char) Vec Byte (List.length l)
go List.[] = []
go (ch List.∷ chs) = mkClip (Char.to ch) go chs
any-of : String.String [ Parser Byte ]
any-of x = List.foldr (λ ch p ((_is ch) <?> any₁) <|> p) fail (String.toList x)
@ -39,7 +54,7 @@ letter = uppercase <|> lowercase
cr lf crlf : [ Parser ]
cr = (λ _ tt) <$> any-of "\r"
lf = (λ _ tt) <$> any-of "\n"
crlf = cr >> enbox lf
crlf = (cr >> enbox lf) <|> lf -- we allow lf because :3
space spaces : [ Parser ]
space = (λ _ tt) <$> any-of " "

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@ -0,0 +1,45 @@
open import Agda.Primitive renaming (Set to Type)
import Data.String as String
open import Data.Product
open import Data.Nat
open import Data.Vec
open import Bits-and-Bytes
open import NonEmpty
open import Base
module Parse-HTTP.Methods where
-- HTTP Method: GET, POST, etc.
data HTTP-Method : Type where
GET HEAD POST PUT DELETE CONNECT OPTIONS TRACE PATCH : HTTP-Method
instance
ShowMethod : Show HTTP-Method
ShowMethod .show x = go x
where
go : HTTP-Method String.String
go GET = "GET"
go HEAD = "HEAD"
go POST = "POST"
go PUT = "PUT"
go DELETE = "DELETE"
go CONNECT = "CONNECT"
go OPTIONS = "OPTIONS"
go TRACE = "TRACE"
go PATCH = "PATCH"
name-of-method : HTTP-Method List⁺ Byte
name-of-method GET = < 71 > ∷⁺ < 69 > ∷⁺ [ < 84 > ]⁺
name-of-method HEAD = < 72 > ∷⁺ < 69 > ∷⁺ < 65 > ∷⁺ [ < 68 > ]⁺
name-of-method POST = < 80 > ∷⁺ < 79 > ∷⁺ < 83 > ∷⁺ [ < 84 > ]⁺
name-of-method PUT = < 80 > ∷⁺ < 85 > ∷⁺ [ < 84 > ]⁺
name-of-method DELETE = < 68 > ∷⁺ < 69 > ∷⁺ < 76 > ∷⁺ < 69 > ∷⁺ < 84 > ∷⁺ [ < 69 > ]⁺
name-of-method CONNECT = < 67 > ∷⁺ < 79 > ∷⁺ < 78 > ∷⁺ < 78 > ∷⁺ < 69 > ∷⁺ < 67 > ∷⁺ [ < 84 > ]⁺
name-of-method OPTIONS = < 79 > ∷⁺ < 80 > ∷⁺ < 84 > ∷⁺ < 73 > ∷⁺ < 79 > ∷⁺ < 78 > ∷⁺ [ < 83 > ]⁺
name-of-method TRACE = < 84 > ∷⁺ < 82 > ∷⁺ < 65 > ∷⁺ < 67 > ∷⁺ [ < 69 > ]⁺
name-of-method PATCH = < 80 > ∷⁺ < 65 > ∷⁺ < 84 > ∷⁺ < 67 > ∷⁺ [ < 72 > ]⁺
http-methods : List⁺ HTTP-Method
http-methods = GET ∷⁺ HEAD ∷⁺ POST ∷⁺ PUT ∷⁺ DELETE ∷⁺ CONNECT ∷⁺ OPTIONS ∷⁺ TRACE ∷⁺ [ PATCH ]⁺

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@ -9,9 +9,12 @@ open import Base
open import Bits-and-Bytes
open import Parsing
open import UTF-8
open import NonEmpty
open import Parse-HTTP
open import Parse-HTTP.Helpers
open import Parse-HTTP.Methods
open import Parse-HTTP.URL
module Parse-HTTP.Test where
@ -84,6 +87,23 @@ module Test-HTTP where
real http:// "www.rfc-editor.org" 80 / ("rfc" / "rfc3986.html" / $) ¿ cake # real "section-2.1" , _ , enc ""
test-url = refl
test-request : parse-get-request .parse (enc "GET /site/index.html?mjau HTTP/1.1\nHeaders...")
real ( ( "site" / "index.html" / $ ) , real "mjau" ) , _ , enc "\nHeaders..."
test-header : parse-header .parse (enc "Content-Length: 6\r\n")
real record { name = vec-to-list⁺ (string-to-ascii "Content-Length") ; value = vec-to-list⁺ (string-to-ascii "6") } , _ , enc "\r\n"
test-header = refl
test-request : parse-request .parse (enc "POST /site/index.html?mjau HTTP/1.1\r\nContent-Length: 6\r\n\r\nmjau:)\r\n")
real
record
{ method = POST
; target = record { path = "site" / "index.html" / $ ; query = real "mjau" }
; version = HTTP11
; headers =
record { name = vec-to-list⁺ (string-to-ascii "Content-Length") ; value = vec-to-list⁺ (string-to-ascii "6") }
List.∷ List.[]
; body = real (Vec.toList (string-to-ascii "mjau:)"))
}
, _
, enc "\r\n"
test-request = refl

53
src/Parse-HTTP/URL.agda Normal file
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@ -0,0 +1,53 @@
open import Agda.Primitive renaming (Set to Type)
import Data.String as String
open import Data.Nat
open import Data.Bool
open import Base
module Parse-HTTP.URL where
record Authority : Type where
constructor __
field
host : String.String -- TODO: Split out IP:s as a separate type?
port :
-- TODO: maybe include {port-in-range} : port < 2 ^ 16
open Authority public
infix 10 __
data Path : Type where
$ : Path -- end
_/_ : String.String Path Path
open Path public
instance
ShowPath : Show Path
ShowPath .show $ = "(empty path)"
ShowPath .show (p / $) = p
ShowPath .show (p / rest@(_ / _)) = p String.++ "/" String.++ show rest
EqPath : Eq Path
EqPath ._==_ $ $ = true
EqPath ._==_ (p / ps) (q / qs) = p == q ps == qs
EqPath ._==_ (_ / _) $ = false
EqPath ._==_ $ (_ / _) = false
infixr 5 _/_
record URL : Type where
constructor http://_/_¿_#_
field
authority : Authority
path : Path
query : Maybe String.String
fragment : Maybe String.String
open URL public
infix 0 http://_/_¿_#_
private
sample-url : URL
sample-url = http:// "coral.shoes" 80 / ("pages" / "index.html" / $) ¿ real "key=value" # cake