First PoC about a native HTTP client on Mirage with mimic/paf/httpaf/h2
This commit is contained in:
parent
5d86452f5f
commit
236e09b7e0
4 changed files with 406 additions and 123 deletions
|
|
@ -1,11 +1,7 @@
|
|||
open Mirage
|
||||
|
||||
type paf = Paf
|
||||
let paf = typ Paf
|
||||
|
||||
let paf_conf () =
|
||||
let packages = [ package "paf" ~sublibs:[ "mirage" ] ] in
|
||||
impl ~packages "Paf_mirage.Make" (time @-> tcpv4v6 @-> paf)
|
||||
type http_client = HTTP_client
|
||||
let http_client = typ HTTP_client
|
||||
|
||||
let remote =
|
||||
let doc = Key.Arg.info
|
||||
|
|
@ -26,15 +22,14 @@ let mirror =
|
|||
foreign "Unikernel.Make"
|
||||
~keys:[ Key.v remote ; Key.v tls_authenticator ]
|
||||
~packages:[
|
||||
package "paf" ~min:"0.0.9" ;
|
||||
package "paf-cohttp" ~min:"0.0.7" ;
|
||||
package "paf" ;
|
||||
package "h2" ;
|
||||
package "httpaf" ;
|
||||
package ~min:"3.0.0" "irmin-mirage-git" ;
|
||||
package ~min:"3.7.0" "git-paf" ;
|
||||
package "opam-file-format" ;
|
||||
]
|
||||
(kv_rw @-> time @-> pclock @-> stackv4v6 @-> dns_client @-> paf @-> git_client @-> job)
|
||||
|
||||
let paf time stackv4v6 = paf_conf () $ time $ tcpv4v6_of_stackv4v6 stackv4v6
|
||||
(kv_rw @-> time @-> pclock @-> stackv4v6 @-> git_client @-> http_client @-> job)
|
||||
|
||||
let stack = generic_stackv4v6 default_network
|
||||
|
||||
|
|
@ -42,10 +37,24 @@ let dns = generic_dns_client stack
|
|||
|
||||
let tcp = tcpv4v6_of_stackv4v6 stack
|
||||
|
||||
let git_client =
|
||||
let git = git_happy_eyeballs stack dns (generic_happy_eyeballs stack dns) in
|
||||
merge_git_clients (git_tcp tcp git)
|
||||
(git_http ~authenticator:tls_authenticator tcp git)
|
||||
let http_client =
|
||||
let connect _ modname = function
|
||||
| [ _time; _pclock; _tcpv4v6; ctx ] ->
|
||||
Fmt.str {ocaml|%s.connect %s|ocaml} modname ctx
|
||||
| _ -> assert false in
|
||||
impl ~connect "Http_mirage_client.Make"
|
||||
(time @-> pclock @-> tcpv4v6 @-> git_client @-> http_client)
|
||||
(* XXX(dinosaure): [git_client] seems bad but it becames from a long discussion
|
||||
when a "mimic" device seems not accepted by everyone. We can copy [git_happy_eyeballs]
|
||||
and provide an [http_client] instead of a [git_client] but that mostly means that
|
||||
2 instances of happy-eyeballs will exists together which is not really good
|
||||
(it puts a pressure on the scheduler). *)
|
||||
|
||||
let git_client, http_client =
|
||||
let happy_eyeballs = git_happy_eyeballs stack dns (generic_happy_eyeballs stack dns) in
|
||||
merge_git_clients (git_tcp tcp happy_eyeballs)
|
||||
(git_http ~authenticator:tls_authenticator tcp happy_eyeballs),
|
||||
http_client $ default_time $ default_posix_clock $ tcp $ happy_eyeballs
|
||||
|
||||
let program_block_size =
|
||||
let doc = Key.Arg.info [ "program-block-size" ] in
|
||||
|
|
@ -56,4 +65,4 @@ let kv_rw =
|
|||
chamelon ~program_block_size block
|
||||
|
||||
let () = register "mirror"
|
||||
[ mirror $ kv_rw $ default_time $ default_posix_clock $ stack $ dns $ paf default_time stack $ git_client ]
|
||||
[ mirror $ kv_rw $ default_time $ default_posix_clock $ stack $ git_client $ http_client ]
|
||||
|
|
|
|||
338
mirage/http_mirage_client.ml
Normal file
338
mirage/http_mirage_client.ml
Normal file
|
|
@ -0,0 +1,338 @@
|
|||
let http_scheme = Mimic.make ~name:"http-scheme"
|
||||
let http_port = Mimic.make ~name:"http-port"
|
||||
let http_hostname = Mimic.make ~name:"http-hostname"
|
||||
let http_sleep = Mimic.make ~name:"http-sleep"
|
||||
let tls_config = Mimic.make ~name:"tls-config"
|
||||
|
||||
open Lwt.Infix
|
||||
|
||||
module type S = sig
|
||||
val connect : Mimic.ctx -> Mimic.ctx Lwt.t
|
||||
val alpn_protocol : Mimic.flow -> string option
|
||||
val authenticator : (X509.Authenticator.t, [> `Msg of string ]) result
|
||||
end
|
||||
|
||||
module Make
|
||||
(Time : Mirage_time.S)
|
||||
(Pclock : Mirage_clock.PCLOCK)
|
||||
(TCP : Tcpip.Tcp.S)
|
||||
(Happy_eyeballs : Mimic_happy_eyeballs.S with type flow = TCP.flow) : S = struct
|
||||
module TCP = struct
|
||||
include TCP
|
||||
type endpoint = Happy_eyeballs.t * string * int
|
||||
type nonrec write_error =
|
||||
[ `Write of write_error | `Connect of string | `Closed ]
|
||||
let pp_write_error ppf = function
|
||||
| `Connect err -> Fmt.string ppf err
|
||||
| `Write err -> pp_write_error ppf err
|
||||
| `Closed as err -> pp_write_error ppf err
|
||||
|
||||
let write flow cs =
|
||||
let open Lwt.Infix in
|
||||
write flow cs >>= function
|
||||
| Ok _ as v -> Lwt.return v
|
||||
| Error err -> Lwt.return_error (`Write err)
|
||||
|
||||
let writev flow css =
|
||||
writev flow css >>= function
|
||||
| Ok _ as v -> Lwt.return v
|
||||
| Error err -> Lwt.return_error (`Write err)
|
||||
|
||||
let connect (happy_eyeballs, hostname, port) =
|
||||
Happy_eyeballs.resolve happy_eyeballs hostname [ port ] >>= function
|
||||
| Error (`Msg err) -> Lwt.return_error (`Connect err)
|
||||
| Ok ((_ipaddr, _port), flow) -> Lwt.return_ok flow
|
||||
end
|
||||
|
||||
let tcp_edn, _tcp_protocol = Mimic.register ~name:"tcp" (module TCP)
|
||||
|
||||
module TLS = struct
|
||||
type endpoint = Happy_eyeballs.t * Tls.Config.client * string * int
|
||||
|
||||
include Tls_mirage.Make (TCP)
|
||||
|
||||
let connect (happy_eyeballs, cfg, hostname, port) =
|
||||
let peer_name =
|
||||
Result.(to_option (bind (Domain_name.of_string hostname) Domain_name.host)) in
|
||||
Happy_eyeballs.resolve happy_eyeballs hostname [ port ] >>= function
|
||||
| Ok ((_ipaddr, _port), flow) -> client_of_flow cfg ?host:peer_name flow
|
||||
| Error (`Msg err) -> Lwt.return_error (`Write (`Connect err))
|
||||
end
|
||||
|
||||
let tls_edn, tls_protocol =
|
||||
Mimic.register ~name:"tls" (module TLS)
|
||||
|
||||
let connect ctx =
|
||||
let k0 happy_eyeballs http_scheme http_hostname http_port = match http_scheme with
|
||||
| "http" -> Lwt.return_some (happy_eyeballs, http_hostname, http_port)
|
||||
| _ -> Lwt.return_none in
|
||||
let k1 happy_eyeballs http_scheme http_hostname http_port tls_config = match http_scheme with
|
||||
| "https" -> Lwt.return_some (happy_eyeballs, tls_config, http_hostname, http_port)
|
||||
| _ -> Lwt.return_none in
|
||||
let ctx = Mimic.fold tcp_edn
|
||||
Mimic.Fun.[ req Happy_eyeballs.happy_eyeballs
|
||||
; req http_scheme; req http_hostname; dft http_port 80 ]
|
||||
~k:k0 ctx in
|
||||
let ctx = Mimic.fold tls_edn
|
||||
Mimic.Fun.[ req Happy_eyeballs.happy_eyeballs
|
||||
; req http_scheme; req http_hostname; dft http_port 443
|
||||
; req tls_config ]
|
||||
~k:k1 ctx in
|
||||
Lwt.return (Mimic.add http_sleep Time.sleep_ns ctx)
|
||||
|
||||
let alpn_protocol flow =
|
||||
let module M = (val (Mimic.repr tls_protocol)) in
|
||||
match flow with
|
||||
| M.T flow ->
|
||||
( match TLS.epoch flow with
|
||||
| Ok { Tls.Core.alpn_protocol; _ } -> alpn_protocol
|
||||
| Error _ -> None )
|
||||
| _ -> None
|
||||
|
||||
let authenticator =
|
||||
let module V = Ca_certs_nss.Make (Pclock) in
|
||||
V.authenticator ()
|
||||
end
|
||||
|
||||
module Version = Httpaf.Version
|
||||
module Status = H2.Status
|
||||
module Headers = H2.Headers
|
||||
|
||||
type response =
|
||||
{ version : Version.t
|
||||
; status : Status.t
|
||||
; reason : string
|
||||
; headers : Headers.t }
|
||||
|
||||
module HTTP_1_1 = struct
|
||||
include Httpaf.Client_connection
|
||||
let yield_reader _ = assert false
|
||||
let next_read_operation t =
|
||||
(next_read_operation t :> [ `Close | `Read | `Yield ])
|
||||
end
|
||||
|
||||
let add_authentication ~add headers = function
|
||||
| None -> headers
|
||||
| Some (user, pass) ->
|
||||
let data = Base64.encode_string (user ^ ":" ^ pass) in
|
||||
add headers "authorization" ("Basic " ^ data)
|
||||
|
||||
let prepare_http_1_1_headers headers host user_pass body_length =
|
||||
let headers = Httpaf.Headers.of_list headers in
|
||||
let add = Httpaf.Headers.add_unless_exists in
|
||||
let headers = add headers "user-agent" ("http-mirage-client/%%VERSION%%") in
|
||||
let headers = add headers "host" host in
|
||||
let headers = add headers "connection" "close" in
|
||||
let headers = match body_length with
|
||||
| None -> headers
|
||||
| Some v -> add headers "content-length" (string_of_int v) in
|
||||
add_authentication ~add headers user_pass
|
||||
|
||||
let single_http_1_1_request ~sleep ?config flow user_pass host meth path headers body =
|
||||
let body_length = Option.map String.length body in
|
||||
let headers = prepare_http_1_1_headers headers host user_pass body_length in
|
||||
let req = Httpaf.Request.create ~headers meth path in
|
||||
let finished, notify_finished = Lwt.wait () in
|
||||
let wakeup = let w = ref false in
|
||||
fun v -> if not !w then Lwt.wakeup_later notify_finished v ; w := true in
|
||||
let response_handler response body =
|
||||
let buf = Buffer.create 0x100 in
|
||||
let rec on_eof () =
|
||||
let response =
|
||||
{ version= response.Httpaf.Response.version
|
||||
; status = (response.Httpaf.Response.status :> H2.Status.t)
|
||||
; reason = response.Httpaf.Response.reason
|
||||
; headers= H2.Headers.of_list (Httpaf.Headers.to_list response.Httpaf.Response.headers) } in
|
||||
wakeup (Ok (response, Some (Buffer.contents buf)))
|
||||
and on_read ba ~off ~len =
|
||||
Buffer.add_string buf (Bigstringaf.substring ~off ~len ba) ;
|
||||
Httpaf.Body.schedule_read body ~on_read ~on_eof in
|
||||
let on_eof () =
|
||||
let response =
|
||||
{ version= response.Httpaf.Response.version
|
||||
; status = (response.Httpaf.Response.status :> H2.Status.t)
|
||||
; reason = response.Httpaf.Response.reason
|
||||
; headers= H2.Headers.of_list (Httpaf.Headers.to_list response.Httpaf.Response.headers) } in
|
||||
wakeup (Ok (response, None)) in
|
||||
Httpaf.Body.schedule_read body ~on_read ~on_eof in
|
||||
let error_handler e =
|
||||
let err = match e with
|
||||
| `Malformed_response x -> Error (`Msg ("Malformed response: " ^ x))
|
||||
| `Invalid_response_body_length _ -> Error (`Msg ("Invalid response body length"))
|
||||
| `Exn e -> Error (`Msg ("Exception here: " ^ Printexc.to_string e)) in
|
||||
wakeup err in
|
||||
let request_body, conn = Httpaf.Client_connection.request ?config req ~error_handler
|
||||
~response_handler in
|
||||
Lwt.async (fun () -> Paf.run (module HTTP_1_1) ~sleep conn flow) ;
|
||||
Option.iter (Httpaf.Body.write_string request_body) body ;
|
||||
Httpaf.Body.close_writer request_body ;
|
||||
finished
|
||||
|
||||
let prepare_h2_headers headers host user_pass body_length =
|
||||
let headers = H2.Headers.of_list headers in
|
||||
let add hdr = H2.Headers.add_unless_exists hdr ?sensitive:None in
|
||||
let headers = add headers ":authority" host in
|
||||
let headers = add headers "content-length" (string_of_int (Option.value ~default:0 body_length)) in
|
||||
add_authentication ~add headers user_pass
|
||||
|
||||
let single_h2_request ~sleep ?config ~scheme flow user_pass host meth path headers body =
|
||||
let body_length = Option.map String.length body in
|
||||
let headers = prepare_h2_headers headers host user_pass body_length in
|
||||
let req = H2.Request.create ~scheme ~headers meth path in
|
||||
let finished, notify_finished = Lwt.wait () in
|
||||
let wakeup = let w = ref false in
|
||||
fun v -> if not !w then Lwt.wakeup_later notify_finished v ; w := true in
|
||||
let response_handler response response_body =
|
||||
let buf = Buffer.create 0x100 in
|
||||
let rec on_eof () =
|
||||
let response =
|
||||
{ version= { major= 2; minor= 0; }
|
||||
; status = response.H2.Response.status
|
||||
; reason = ""
|
||||
; headers= response.H2.Response.headers } in
|
||||
wakeup (Ok (response, Some (Buffer.contents buf)))
|
||||
and on_read ba ~off ~len =
|
||||
Buffer.add_string buf (Bigstringaf.substring ~off ~len ba) ;
|
||||
H2.Body.Reader.schedule_read response_body
|
||||
~on_read ~on_eof in
|
||||
let on_eof () =
|
||||
let response =
|
||||
{ version= { major= 2; minor= 0; }
|
||||
; status = response.H2.Response.status
|
||||
; reason = ""
|
||||
; headers= response.H2.Response.headers } in
|
||||
wakeup (Ok (response, None)) in
|
||||
H2.Body.Reader.schedule_read response_body
|
||||
~on_read ~on_eof in
|
||||
let error_handler e =
|
||||
let err = match e with
|
||||
| `Malformed_response x -> Error (`Msg ("Malformed response: " ^ x))
|
||||
| `Invalid_response_body_length _ -> Error (`Msg "Invalid response body length")
|
||||
| `Protocol_error (err, msg) ->
|
||||
let kerr _ = Error (`Msg (Format.flush_str_formatter ())) in
|
||||
Format.kfprintf kerr Format.str_formatter "%a: %s" H2.Error_code.pp_hum err msg
|
||||
| `Exn e -> Error (`Msg ("Exception here: " ^ Printexc.to_string e)) in
|
||||
wakeup err in
|
||||
let conn = H2.Client_connection.create ?config ?push_handler:None
|
||||
~error_handler in
|
||||
let request_body = H2.Client_connection.request conn req ~error_handler ~response_handler in
|
||||
Lwt.async (fun () -> Paf.run (module H2.Client_connection) ~sleep conn flow) ;
|
||||
Option.iter (H2.Body.Writer.write_string request_body) body ;
|
||||
H2.Body.Writer.close request_body ;
|
||||
finished
|
||||
|
||||
let decode_uri ~ctx uri =
|
||||
let ( >>= ) = Result.bind in
|
||||
match String.split_on_char '/' uri with
|
||||
| proto :: "" :: user_pass_host_port :: path ->
|
||||
( if String.equal proto "http:"
|
||||
then Ok ("http", Mimic.add http_scheme "http" ctx)
|
||||
else if String.equal proto "https:"
|
||||
then Ok ("https", Mimic.add http_scheme "https" ctx)
|
||||
else Error (`Msg "Couldn't decode user and password") ) >>= fun (scheme, ctx) ->
|
||||
let decode_user_pass up = match String.split_on_char ':' up with
|
||||
| [ user; pass; ] -> Ok (user, pass)
|
||||
| _ -> Error (`Msg "Couldn't decode user and password") in
|
||||
( match String.split_on_char '@' user_pass_host_port with
|
||||
| [ host_port ] -> Ok (None, host_port)
|
||||
| [ user_pass; host_port ] ->
|
||||
decode_user_pass user_pass >>= fun up ->
|
||||
Ok (Some up, host_port)
|
||||
| _ -> Error (`Msg "Couldn't decode URI") ) >>= fun (user_pass, host_port) ->
|
||||
( match String.split_on_char ':' host_port with
|
||||
| [] -> Error (`Msg "Empty host & port")
|
||||
| [ hostname ] -> Ok (hostname, Mimic.add http_hostname hostname ctx)
|
||||
| hd :: tl ->
|
||||
let port, hostname = match List.rev (hd :: tl) with
|
||||
| hd :: tl -> hd, String.concat ":" (List.rev tl)
|
||||
| _ -> assert false in
|
||||
( try Ok (hostname, Mimic.add http_hostname hostname (Mimic.add http_port (int_of_string port) ctx))
|
||||
with Failure _ -> Error (`Msg "Couldn't decode port") ) ) >>= fun (hostname, ctx) ->
|
||||
Ok (ctx, scheme, hostname, user_pass, "/" ^ String.concat "/" path)
|
||||
| _ -> Error (`Msg "Couldn't decode URI on top")
|
||||
|
||||
let ( >>? ) = Lwt_result.bind
|
||||
|
||||
let alpn_protocol_of_string = function
|
||||
| "http/1.1" -> Some `HTTP_1_1
|
||||
| "h2" -> Some `H2
|
||||
| _ -> None
|
||||
|
||||
let single_request ~ctx ~alpn_protocol ?config cfg ~meth ~headers ?body uri =
|
||||
let sleep = Option.get (Mimic.get http_sleep ctx) in
|
||||
Lwt.return (decode_uri ~ctx uri) >>? fun (ctx, scheme, host, user_pass, path) ->
|
||||
let ctx = match Lazy.force cfg with
|
||||
| Ok (`Custom cfg) -> Mimic.add tls_config cfg ctx
|
||||
| Ok (`Default cfg) ->
|
||||
( match Result.bind (Domain_name.of_string host) Domain_name.host with
|
||||
| Ok peer -> Mimic.add tls_config (Tls.Config.peer cfg peer) ctx
|
||||
| Error _ -> Mimic.add tls_config cfg ctx )
|
||||
| Error _ -> ctx in
|
||||
Mimic.resolve ctx >>? fun flow ->
|
||||
match Option.bind (alpn_protocol flow) alpn_protocol_of_string, config with
|
||||
| (Some `HTTP_1_1 | None), Some (`HTTP_1_1 config) ->
|
||||
single_http_1_1_request ~sleep ~config flow user_pass host meth path headers body
|
||||
| (Some `HTTP_1_1 | None), None ->
|
||||
single_http_1_1_request ~sleep flow user_pass host meth path headers body
|
||||
| (Some `H2 | None), Some (`H2 config) ->
|
||||
single_h2_request ~sleep ~config ~scheme flow user_pass host meth path headers body
|
||||
| Some `H2, None ->
|
||||
single_h2_request ~sleep ~scheme flow user_pass host meth path headers body
|
||||
| Some `H2, (Some (`HTTP_1_1 _)) ->
|
||||
single_h2_request ~sleep ~scheme flow user_pass host meth path headers body
|
||||
| Some `HTTP_1_1, Some (`H2 _) ->
|
||||
single_http_1_1_request ~sleep flow user_pass host meth path headers body
|
||||
|
||||
let tls_config ?tls_config ?config authenticator =
|
||||
lazy ( match tls_config with
|
||||
| Some cfg -> Ok (`Custom cfg)
|
||||
| None ->
|
||||
let alpn_protocols = match config with
|
||||
| None -> [ "h2"; "http/1.1" ]
|
||||
| Some (`H2 _) -> [ "h2" ]
|
||||
| Some (`HTTP_1_1 _) -> [ "http/1.1" ] in
|
||||
Result.map (fun authenticator -> `Default (Tls.Config.client ~alpn_protocols ~authenticator ())) authenticator )
|
||||
|
||||
let resolve_location ~uri ~location =
|
||||
match String.split_on_char '/' location with
|
||||
| "http:" :: "" :: _ -> Ok location
|
||||
| "https:" :: "" :: _ -> Ok location
|
||||
| "" :: "" :: _ ->
|
||||
let schema = String.sub uri 0 (String.index uri '/') in
|
||||
Ok (schema ^ location)
|
||||
| "" :: _ ->
|
||||
(match String.split_on_char '/' uri with
|
||||
| schema :: "" :: user_pass_host_port :: _ ->
|
||||
Ok (String.concat "/" [schema ; "" ; user_pass_host_port ^ location])
|
||||
| _ -> Error (`Msg ("expected an absolute uri, got: " ^ uri)))
|
||||
| _ -> Error (`Msg ("unknown location (relative path): " ^ location))
|
||||
|
||||
let one_request
|
||||
?config
|
||||
?tls_config:cfg
|
||||
~ctx
|
||||
~alpn_protocol
|
||||
~authenticator
|
||||
?(meth= `GET)
|
||||
?(headers= [])
|
||||
?body
|
||||
?(max_redirect= 5)
|
||||
?(follow_redirect= true) uri =
|
||||
let tls_config = tls_config ?tls_config:cfg ?config authenticator in
|
||||
if not follow_redirect
|
||||
then single_request ~ctx ~alpn_protocol ?config tls_config ~meth ~headers ?body uri
|
||||
else
|
||||
let rec follow_redirect count uri =
|
||||
if count = 0 then Lwt.return_error (`Msg "Redirect limit exceeded")
|
||||
else
|
||||
single_request ~ctx ~alpn_protocol ?config tls_config ~meth ~headers ?body uri
|
||||
>>? fun (resp, body) ->
|
||||
match resp.status with
|
||||
| #Status.redirection ->
|
||||
( match Headers.get resp.headers "location" with
|
||||
| Some location ->
|
||||
Lwt.return (resolve_location ~uri ~location) >>? fun uri ->
|
||||
follow_redirect (pred count) uri
|
||||
| None -> Lwt.return_ok (resp, body) )
|
||||
| _ -> Lwt.return_ok (resp, body) in
|
||||
follow_redirect max_redirect uri
|
||||
35
mirage/http_mirage_client.mli
Normal file
35
mirage/http_mirage_client.mli
Normal file
|
|
@ -0,0 +1,35 @@
|
|||
module type S = sig
|
||||
val connect : Mimic.ctx -> Mimic.ctx Lwt.t
|
||||
val alpn_protocol : Mimic.flow -> string option
|
||||
val authenticator : (X509.Authenticator.t, [> `Msg of string ]) result
|
||||
end
|
||||
|
||||
module Make
|
||||
(Time : Mirage_time.S)
|
||||
(Pclock : Mirage_clock.PCLOCK)
|
||||
(TCP : Tcpip.Tcp.S)
|
||||
(Happy_eyeballs : Mimic_happy_eyeballs.S with type flow = TCP.flow) : S
|
||||
|
||||
module Version = Httpaf.Version
|
||||
module Status = H2.Status
|
||||
module Headers = H2.Headers
|
||||
|
||||
type response =
|
||||
{ version : Version.t
|
||||
; status : Status.t
|
||||
; reason : string
|
||||
; headers : Headers.t }
|
||||
|
||||
val one_request :
|
||||
?config:[ `H2 of H2.Config.t | `HTTP_1_1 of Httpaf.Config.t ] ->
|
||||
?tls_config:Tls.Config.client ->
|
||||
ctx:Mimic.ctx ->
|
||||
alpn_protocol:(Mimic.flow -> string option) ->
|
||||
authenticator:(X509.Authenticator.t, [> `Msg of string ]) result ->
|
||||
?meth:Httpaf.Method.t ->
|
||||
?headers:(string * string) list ->
|
||||
?body:string ->
|
||||
?max_redirect:int ->
|
||||
?follow_redirect:bool ->
|
||||
string ->
|
||||
(response * string option, [> Mimic.error ]) result Lwt.t
|
||||
|
|
@ -14,60 +14,12 @@ module Make
|
|||
(Time : Mirage_time.S)
|
||||
(Pclock : Mirage_clock.PCLOCK)
|
||||
(Stack : Tcpip.Stack.V4V6)
|
||||
(Dns : DNS) (* XXX(dinosaure): ask @hannesm to provide a signature. *)
|
||||
(Paf : Paf_mirage.S with type stack = Stack.TCP.t and type ipaddr = Ipaddr.t)
|
||||
(_ : sig end) = struct
|
||||
(_ : sig end)
|
||||
(HTTP : Http_mirage_client.S) = struct
|
||||
|
||||
module Store = Irmin_mirage_git.Mem.KV.Make(Irmin.Contents.String)
|
||||
module Sync = Irmin.Sync.Make(Store)
|
||||
|
||||
module Client = Paf_cohttp
|
||||
module Nss = Ca_certs_nss.Make(Pclock)
|
||||
|
||||
let authenticator = Result.get_ok (Nss.authenticator ())
|
||||
let default_tls_cfg = Tls.Config.client ~authenticator ()
|
||||
|
||||
let stack = Mimic.make ~name:"stack"
|
||||
let tls = Mimic.make ~name:"tls"
|
||||
|
||||
let with_stack v ctx = Mimic.add stack (Stack.tcp v) ctx
|
||||
|
||||
let with_tcp ctx =
|
||||
let k scheme stack ipaddr port =
|
||||
match scheme with
|
||||
| `HTTP -> Lwt.return_some (stack, ipaddr, port)
|
||||
| _ -> Lwt.return_none
|
||||
in
|
||||
Mimic.(fold Paf.tcp_edn Fun.[ req Client.scheme
|
||||
; req stack
|
||||
; req Client.ipaddr
|
||||
; dft Client.port 80 ] ~k ctx)
|
||||
|
||||
let with_tls ctx =
|
||||
let k scheme domain_name cfg stack ipaddr port =
|
||||
match scheme with
|
||||
| `HTTPS -> Lwt.return_some (domain_name, cfg, stack, ipaddr, port)
|
||||
| _ -> Lwt.return_none
|
||||
in
|
||||
Mimic.(fold Paf.tls_edn Fun.[ req Client.scheme
|
||||
; opt Client.domain_name
|
||||
; dft tls default_tls_cfg
|
||||
; req stack
|
||||
; req Client.ipaddr
|
||||
; dft Client.port 443 ] ~k ctx)
|
||||
|
||||
let dns = Mimic.make ~name:"dns"
|
||||
|
||||
let with_dns v ctx = Mimic.add dns v ctx
|
||||
let with_sleep ctx = Mimic.add Paf_cohttp.sleep Time.sleep_ns ctx
|
||||
|
||||
let with_resolv ctx =
|
||||
let k dns domain_name =
|
||||
Dns.gethostbyname dns domain_name >>= function
|
||||
| Ok ipv4 -> Lwt.return_some (Ipaddr.V4 ipv4)
|
||||
| _ -> Lwt.return_none in
|
||||
Mimic.(fold Client.ipaddr Fun.[ req dns; req Client.domain_name ] ~k ctx)
|
||||
|
||||
module SM = Map.Make(String)
|
||||
|
||||
module HM = Map.Make(struct
|
||||
|
|
@ -406,21 +358,10 @@ module Make
|
|||
Error `Not_found
|
||||
end
|
||||
|
||||
let resolve_location ~uri ~location =
|
||||
match String.split_on_char '/' location with
|
||||
| "http:" :: "" :: _ -> Ok location
|
||||
| "https:" :: "" :: _ -> Ok location
|
||||
| "" :: "" :: _ ->
|
||||
let schema = String.sub uri 0 (String.index uri '/') in
|
||||
Ok (schema ^ location)
|
||||
| "" :: _ ->
|
||||
(match String.split_on_char '/' uri with
|
||||
| schema :: "" :: user_pass_host_port :: _ ->
|
||||
Ok (String.concat "/" [schema ; "" ; user_pass_host_port ^ location])
|
||||
| _ -> Error (`Msg ("expected an absolute uri, got: " ^ uri)))
|
||||
| _ -> Error (`Msg ("unknown location (relative path): " ^ location))
|
||||
let one_request = Http_mirage_client.one_request ~alpn_protocol:HTTP.alpn_protocol
|
||||
~authenticator:HTTP.authenticator
|
||||
|
||||
let start kv _time _pclock stack dns _paf_cohttp git_ctx =
|
||||
let start kv _time _pclock stack git_ctx http_ctx =
|
||||
Git.connect git_ctx >>= fun (store, upstream) ->
|
||||
Git.pull store upstream >>= function
|
||||
| Error `Msg msg -> Lwt.fail_with msg
|
||||
|
|
@ -428,46 +369,6 @@ module Make
|
|||
Logs.info (fun m -> m "git: %s" msg);
|
||||
Git.find_urls store >>= fun urls ->
|
||||
Disk.init kv >>= fun disk ->
|
||||
let ctx =
|
||||
Mimic.empty
|
||||
|> with_sleep
|
||||
|> with_tcp (* stack -> ipaddr -> port => (stack * ipaddr * port) *)
|
||||
|> with_tls (* domain_name -> tls -> stack -> ipaddr -> port => (domain_name * tls * stack * ipaddr * port) *)
|
||||
|> with_resolv (* domain_name => ipaddr *)
|
||||
|> with_stack stack (* stack *)
|
||||
|> with_dns dns (* dns *) in
|
||||
let rec follow count uri =
|
||||
if count = 0 then begin
|
||||
Logs.err (fun m -> m "redirection limit exceeded");
|
||||
Lwt.return None
|
||||
end else begin
|
||||
Logs.info (fun m -> m "retrieving %s" uri);
|
||||
Client.get ~ctx (Uri.of_string uri) >>= fun (resp, body) ->
|
||||
match resp.Cohttp.Response.status with
|
||||
| `OK ->
|
||||
Cohttp_lwt.Body.to_string body >|= fun str ->
|
||||
Some str
|
||||
| #Cohttp.Code.redirection_status ->
|
||||
begin match Cohttp.Header.get resp.Cohttp.Response.headers "location" with
|
||||
| Some location ->
|
||||
begin match resolve_location ~uri ~location with
|
||||
| Error `Msg msg ->
|
||||
Logs.err (fun m -> m "error %s resolving redirect location %s"
|
||||
msg location);
|
||||
Lwt.return None
|
||||
| Ok new_uri -> follow (pred count) new_uri
|
||||
end
|
||||
| None ->
|
||||
Logs.err (fun m -> m "redirect without location");
|
||||
Lwt.return None
|
||||
end
|
||||
| s ->
|
||||
Logs.err (fun m -> m "error %s while fetching %s"
|
||||
(Cohttp.Code.string_of_status resp.Cohttp.Response.status)
|
||||
uri);
|
||||
Lwt.return None
|
||||
end
|
||||
in
|
||||
Lwt_list.iter_p (fun (url, csums) ->
|
||||
HM.fold (fun h v r ->
|
||||
r >>= function
|
||||
|
|
@ -478,11 +379,11 @@ module Make
|
|||
Logs.info (fun m -> m "ignoring %s (already present)" url);
|
||||
Lwt.return_unit
|
||||
| false ->
|
||||
follow 20 url >>= function
|
||||
| Some str ->
|
||||
one_request ~ctx:http_ctx url >>= function
|
||||
| Ok (resp, Some str) ->
|
||||
Logs.info (fun m -> m "writing (%d)" (String.length str));
|
||||
Disk.write disk str csums
|
||||
| None -> Lwt.return_unit)
|
||||
| _ -> Lwt.return_unit)
|
||||
(SM.bindings urls) >|= fun () ->
|
||||
Logs.info (fun m -> m "done")
|
||||
end
|
||||
|
|
|
|||
Loading…
Reference in a new issue