Source file smart.ml
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module type COMMON = sig
type hash
type reference
type advertised_refs =
{ shallow: hash list
; refs: (hash * reference * bool) list
; capabilities: Capability.t list }
type shallow_update = hash Sync.shallow_update
type acks = hash Sync.acks
type negociation_result = NAK | ACK of hash | ERR of string
type pack = [`Raw of Cstruct.t | `Out of Cstruct.t | `Err of Cstruct.t]
type report_status =
{ unpack: (unit, string) result
; commands: (reference, reference * string) result list }
type upload_request =
{ want: hash * hash list
; capabilities: Capability.t list
; shallow: hash list
; deep: [`Depth of int | `Timestamp of int64 | `Ref of reference] option }
type request_command = [`Upload_pack | `Receive_pack | `Upload_archive]
type git_proto_request =
{ pathname: string
; host: (string * int option) option
; request_command: request_command }
type command =
| Create of hash * reference
| Delete of hash * reference
| Update of hash * hash * reference
type push_certificate =
{ pusher: string
; pushee: string
; nonce: string
; options: string list
; commands: command list
; gpg: string list }
type update_request =
{ shallow: hash list
; requests: [`Raw of command * command list | `Cert of push_certificate]
; capabilities: Capability.t list }
type http_upload_request =
{ want: hash * hash list
; capabilities: Capability.t list
; shallow: hash list
; deep: [`Depth of int | `Timestamp of int64 | `Ref of reference] option
; has: hash list }
val pp_advertised_refs : advertised_refs Fmt.t
val pp_shallow_update : shallow_update Fmt.t
val pp_acks : acks Fmt.t
val pp_negociation_result : negociation_result Fmt.t
val pp_pack : pack Fmt.t
val pp_report_status : report_status Fmt.t
val pp_upload_request : upload_request Fmt.t
val pp_request_command : request_command Fmt.t
val pp_git_proto_request : git_proto_request Fmt.t
val pp_command : command Fmt.t
val pp_push_certificate : push_certificate Fmt.t
val pp_update_request : update_request Fmt.t
val pp_http_upload_request : http_upload_request Fmt.t
type 'a equal = 'a -> 'a -> bool
val equal_advertised_refs : advertised_refs equal
val equal_shallow_update : shallow_update equal
val equal_acks : acks equal
val equal_negociation_result : negociation_result equal
val equal_pack : pack equal
val equal_report_status : report_status equal
val equal_upload_request : upload_request equal
val equal_request_command : request_command equal
val equal_git_proto_request : git_proto_request equal
val equal_command : command equal
val equal_push_certificate : push_certificate equal
val equal_update_request : update_request equal
val equal_http_upload_request : http_upload_request equal
end
module Common
(Hash : S.HASH)
(Reference : Reference.S with module Hash := Hash) =
struct
type hash = Hash.t
type reference = Reference.t
type 'a equal = 'a -> 'a -> bool
type advertised_refs =
{ shallow: hash list
; refs: (hash * reference * bool) list
; capabilities: Capability.t list }
let pp_advertised_refs ppf {shallow; refs; capabilities} =
let pp_ref ppf (hash, reference, peeled) =
match peeled with
| true -> Fmt.pf ppf "%a^{}:%a" Reference.pp reference Hash.pp hash
| false -> Fmt.pf ppf "%a:%a" Reference.pp reference Hash.pp hash
in
Fmt.pf ppf "{ @[<hov>shallow = %a;@ refs = %a;@ capabilities = %a;@]}"
Fmt.Dump.(list Hash.pp)
shallow
Fmt.Dump.(list pp_ref)
refs
Fmt.Dump.(list Capability.pp)
capabilities
let equal_advertised_refs a b =
let equal_ref (hash_a, ref_a, peeled_a) (hash_b, ref_b, peeled_b) =
Hash.equal hash_a hash_b
&& Reference.equal ref_a ref_b
&& peeled_a = peeled_b
in
let compare_ref (_, a, _) (_, b, _) = Reference.compare a b in
try
List.for_all2 Hash.equal
(List.sort Hash.compare a.shallow)
(List.sort Hash.compare b.shallow)
&& List.for_all2 equal_ref
(List.sort compare_ref a.refs)
(List.sort compare_ref b.refs)
&& List.for_all2 Capability.equal
(List.sort Capability.compare a.capabilities)
(List.sort Capability.compare b.capabilities)
with Invalid_argument _ -> false
type shallow_update = hash Sync.shallow_update
let pp_shallow_update ppf ({shallow; unshallow} : shallow_update) =
Fmt.pf ppf "{ @[<hov>shallow = %a;@ unshallow = %a;@] }"
Fmt.Dump.(list Hash.pp)
shallow
Fmt.Dump.(list Hash.pp)
unshallow
let equal_shallow_update (a : shallow_update) (b : shallow_update) =
try
List.for_all2 Hash.equal
(List.sort Hash.compare a.shallow)
(List.sort Hash.compare b.shallow)
&& List.for_all2 Hash.equal
(List.sort Hash.compare a.unshallow)
(List.sort Hash.compare b.unshallow)
with Invalid_argument _ -> false
type acks = hash Sync.acks
let pp_acks ppf ({shallow; unshallow; acks} : acks) =
let pp_ack ppf (hash, ack) =
match ack with
| `Continue -> Fmt.pf ppf "continue:%a" Hash.pp hash
| `Ready -> Fmt.pf ppf "ready:%a" Hash.pp hash
| `Common -> Fmt.pf ppf "common:%a" Hash.pp hash
| `ACK -> Fmt.pf ppf "ACK:%a" Hash.pp hash
in
Fmt.pf ppf "{ @[<hov>shallow = %a;@ unshallow = %a;@ acks = %a;@] }"
Fmt.Dump.(list Hash.pp)
shallow
Fmt.Dump.(list Hash.pp)
unshallow
Fmt.Dump.(list pp_ack)
acks
let equal_acks (a : acks) (b : acks) =
let equal_ack (hash_a, detail_a) (hash_b, detail_b) =
Hash.equal hash_a hash_b
&&
match detail_a, detail_b with
| `Common, `Common -> true
| `Ready, `Ready -> true
| `Continue, `Continue -> true
| `ACK, `ACK -> true
| _, _ -> false
in
let compare_ack (a, _) (b, _) = Hash.compare a b in
try
List.for_all2 Hash.equal
(List.sort Hash.compare a.shallow)
(List.sort Hash.compare b.shallow)
&& List.for_all2 Hash.equal
(List.sort Hash.compare a.unshallow)
(List.sort Hash.compare b.unshallow)
&& List.for_all2 equal_ack
(List.sort compare_ack a.acks)
(List.sort compare_ack b.acks)
with Invalid_argument _ -> false
type negociation_result = NAK | ACK of hash | ERR of string
let pp_negociation_result ppf = function
| NAK -> Fmt.string ppf "NAK"
| ACK hash -> Fmt.pf ppf "(ACK %a)" Hash.pp hash
| ERR err -> Fmt.pf ppf "(ERR %s)" err
let equal_negociation_result a b =
match a, b with
| NAK, NAK -> true
| ACK a, ACK b -> Hash.equal a b
| ERR a, ERR b -> String.equal a b
| _, _ -> false
type pack = [`Raw of Cstruct.t | `Out of Cstruct.t | `Err of Cstruct.t]
let pp_pack ppf = function
| `Raw raw ->
Fmt.pf ppf "@[<5>(Raw %a)@]"
(Encore.Lole.pp_scalar ~get:Cstruct.get_char ~length:Cstruct.len)
raw
| `Out out -> Fmt.pf ppf "@[<5>(Out %S)@]" (Cstruct.to_string out)
| `Err err -> Fmt.pf ppf "@[<5>(Err %S)@]" (Cstruct.to_string err)
let equal_pack a b =
match a, b with
| `Err a, `Err b | `Out a, `Out b | `Raw a, `Raw b -> Cstruct.equal a b
| _, _ -> false
type report_status =
{ unpack: (unit, string) result
; commands: (reference, reference * string) result list }
let pp_report_status ppf {unpack; commands} =
Fmt.pf ppf "{ @[<hov>unpack = %a;@ commands = %a;@] }"
Fmt.(Dump.result ~ok:Fmt.nop ~error:Fmt.string)
unpack
Fmt.(
Dump.list
(Dump.result ~ok:Reference.pp ~error:(pair Reference.pp string)))
commands
let equal_report_status a b =
let equal_result ~ok ~error a b =
match a, b with
| Ok a, Ok b -> ok a b
| Error a, Error b -> error a b
| _, _ -> false
in
let compare_result ~ok ~error a b =
match a, b with
| Ok a, Ok b -> ok a b
| Error a, Error b -> error a b
| Ok _, Error _ -> 1
| Error _, Ok _ -> -1
in
let compare_ref_and_msg (ref_a, msg_a) (ref_b, msg_b) =
let res = Reference.compare ref_a ref_b in
if res = 0 then String.compare msg_a msg_b else res
in
let equal_ref_and_msg a b = compare_ref_and_msg a b = 0 in
try
equal_result
~ok:(fun () () -> true)
~error:String.equal a.unpack b.unpack
&& List.for_all2
(equal_result ~ok:Reference.equal ~error:equal_ref_and_msg)
(List.sort
(compare_result ~ok:Reference.compare ~error:compare_ref_and_msg)
a.commands)
(List.sort
(compare_result ~ok:Reference.compare ~error:compare_ref_and_msg)
b.commands)
with Invalid_argument _ -> false
type upload_request =
{ want: hash * hash list
; capabilities: Capability.t list
; shallow: hash list
; deep: [`Depth of int | `Timestamp of int64 | `Ref of reference] option }
let pp_upload_request ppf {want; capabilities; shallow; deep} =
let pp_deep ppf = function
| `Depth n -> Fmt.pf ppf "(Depth %d)" n
| `Timestamp n -> Fmt.pf ppf "(Timestamp %Ld)" n
| `Ref r -> Fmt.pf ppf "(`Ref %a)" Reference.pp r
in
Fmt.pf ppf
"{ @[<hov>want = %a;@ capabiliteis = %a;@ shallow = %a; deep = %a;@] }"
Fmt.(Dump.list Hash.pp)
(fst want :: snd want)
Fmt.(Dump.list Capability.pp)
capabilities
Fmt.(Dump.list Hash.pp)
shallow
Fmt.(Dump.option pp_deep)
deep
let equal_upload_request a b =
try
let equal_deep a b =
match a, b with
| `Depth a, `Depth b -> a = b
| `Timestamp a, `Timestamp b -> Int64.equal a b
| `Ref a, `Ref b -> Reference.equal a b
| _, _ -> false
in
List.for_all2 Hash.equal
(List.sort Hash.compare (fst a.want :: snd a.want))
(List.sort Hash.compare (fst b.want :: snd b.want))
&& List.for_all2 Capability.equal
(List.sort Capability.compare a.capabilities)
(List.sort Capability.compare b.capabilities)
&& List.for_all2 Hash.equal
(List.sort Hash.compare a.shallow)
(List.sort Hash.compare b.shallow)
&&
match a.deep, b.deep with
| Some a, Some b -> equal_deep a b
| None, None -> true
| _, _ -> false
with Invalid_argument _ -> false
type request_command = [`Upload_pack | `Receive_pack | `Upload_archive]
let equal_request_command a b =
match a, b with
| `Upload_pack, `Upload_pack
|`Receive_pack, `Receive_pack
|`Upload_archive, `Upload_archive ->
true
| _, _ -> true
let pp_request_command ppf = function
| `Upload_pack -> Fmt.string ppf "`Upload_pack"
| `Receive_pack -> Fmt.string ppf "`Receive_pack"
| `Upload_archive -> Fmt.string ppf "`Upload_archive"
type git_proto_request =
{ pathname: string
; host: (string * int option) option
; request_command: request_command }
let pp_git_proto_request ppf {pathname; host; request_command} =
let pp_host ppf (host, port) =
match port with
| Some port -> Fmt.pf ppf "%s:%d" host port
| None -> Fmt.string ppf host
in
Fmt.pf ppf "{ @[<hov>pathname = %s;@ host = %a;@ request_command = %a;@] }"
pathname
Fmt.(Dump.option pp_host)
host pp_request_command request_command
let equal_git_proto_request a b =
let equal_option equal a b =
match a, b with
| Some a, Some b -> equal a b
| None, None -> true
| _, _ -> false
in
let equal_host (host_a, port_a) (host_b, port_b) =
String.equal host_a host_b && equal_option ( = ) port_a port_b
in
String.equal a.pathname b.pathname
&& equal_option equal_host a.host b.host
&& equal_request_command a.request_command b.request_command
type command =
| Create of hash * reference
| Delete of hash * reference
| Update of hash * hash * reference
let pp_command ppf = function
| Create (hash, reference) ->
Fmt.pf ppf "(Create %a:%a)" Reference.pp reference Hash.pp hash
| Delete (hash, reference) ->
Fmt.pf ppf "(Delete %a:%a)" Reference.pp reference Hash.pp hash
| Update (a, b, reference) ->
Fmt.pf ppf "(Create %a:@[<0>%a -> %a@])" Reference.pp reference Hash.pp
a Hash.pp b
let equal_command a b =
match a, b with
| Create (hash_a, ref_a), Create (hash_b, ref_b) ->
Hash.equal hash_a hash_b && Reference.equal ref_a ref_b
| Delete (hash_a, ref_a), Delete (hash_b, ref_b) ->
Hash.equal hash_a hash_b && Reference.equal ref_a ref_b
| Update (to_a, of_a, ref_a), Update (to_b, of_b, ref_b) ->
Hash.equal to_a to_b
&& Hash.equal of_a of_b
&& Reference.equal ref_a ref_b
| _, _ -> false
type push_certificate =
{ pusher: string
; pushee: string
; nonce: string
; options: string list
; commands: command list
; gpg: string list }
let pp_push_certificate ppf pcert =
Fmt.pf ppf
"{ @[<hov>pusher = %s;@ pushee = %s;@ nonce = %S;@ options = %a;@ \
commands = %a;@ gpg = %a;@] }"
pcert.pusher pcert.pushee pcert.nonce
Fmt.(Dump.list string)
pcert.options
Fmt.(Dump.list pp_command)
pcert.commands
Fmt.(Dump.list (fmt "%S"))
pcert.gpg
let compare_command a b =
match a, b with
| Create (hash_a, ref_a), Create (hash_b, ref_b)
|Delete (hash_a, ref_a), Delete (hash_b, ref_b) ->
let res = Hash.compare hash_a hash_b in
if res = 0 then Reference.compare ref_a ref_b else res
| Update (to_a, of_a, ref_a), Update (to_b, of_b, ref_b) ->
let res = Hash.compare to_a to_b in
if res = 0 then
let res = Hash.compare of_a of_b in
if res = 0 then Reference.compare ref_a ref_b else res
else res
| Create _, _ -> 1
| Delete _, Create _ -> -1
| Update _, Create _ -> -1
| Delete _, _ -> 1
| Update _, Delete _ -> -1
let equal_push_certificate a b =
try
String.equal a.pusher b.pusher
&& String.equal a.pushee b.pushee
&& String.equal a.nonce b.nonce
&& List.for_all2 String.equal
(List.sort String.compare a.options)
(List.sort String.compare b.options)
&& List.for_all2 equal_command
(List.sort compare_command a.commands)
(List.sort compare_command b.commands)
with Invalid_argument _ -> false
type update_request =
{ shallow: hash list
; requests: [`Raw of command * command list | `Cert of push_certificate]
; capabilities: Capability.t list }
let pp_update_request ppf {shallow; requests; capabilities} =
let pp_requests ppf = function
| `Raw commands ->
Fmt.(Dump.list pp_command) ppf (fst commands :: snd commands)
| `Cert pcert -> pp_push_certificate ppf pcert
in
Fmt.pf ppf "{ @[<hov>shallow = %a;@ requests = %a;@ capabilities = %a;@] }"
Fmt.(Dump.list Hash.pp)
shallow (Fmt.hvbox pp_requests) requests
Fmt.(Dump.list Capability.pp)
capabilities
let equal_update_request a b =
let equal_raw a b =
List.for_all2 equal_command
(List.sort compare_command (fst a :: snd a))
(List.sort compare_command (fst b :: snd b))
in
try
List.for_all2 Hash.equal
(List.sort Hash.compare a.shallow)
(List.sort Hash.compare b.shallow)
&& ( match a.requests, b.requests with
| `Raw a, `Raw b -> equal_raw a b
| `Cert a, `Cert b -> equal_push_certificate a b
| _, _ -> false )
&& List.for_all2 Capability.equal
(List.sort Capability.compare a.capabilities)
(List.sort Capability.compare b.capabilities)
with Invalid_argument _ -> false
type http_upload_request =
{ want: hash * hash list
; capabilities: Capability.t list
; shallow: hash list
; deep: [`Depth of int | `Timestamp of int64 | `Ref of reference] option
; has: hash list }
let equal_http_upload_request a b =
try
equal_upload_request
{ want= a.want
; capabilities= a.capabilities
; shallow= a.shallow
; deep= a.deep }
{ want= b.want
; capabilities= b.capabilities
; shallow= b.shallow
; deep= b.deep }
&& List.for_all2 Hash.equal
(List.sort Hash.compare a.has)
(List.sort Hash.compare b.has)
with Invalid_argument _ -> false
let pp_http_upload_request ppf {want; capabilities; shallow; deep; has} =
let pp_deep ppf = function
| `Depth n -> Fmt.pf ppf "(Depth %d)" n
| `Timestamp n -> Fmt.pf ppf "(Timestamp %Ld)" n
| `Ref r -> Fmt.pf ppf "(`Ref %a)" Reference.pp r
in
Fmt.pf ppf
"{ @{<hov>want = %a;@ capabilities = %a;@ shallow = %a;@ deep = %a;@ \
has = %a;@} }"
Fmt.(Dump.list Hash.pp)
(fst want :: snd want)
Fmt.(Dump.list Capability.pp)
capabilities
Fmt.(Dump.list Hash.pp)
shallow
Fmt.(Dump.option pp_deep)
deep
Fmt.(Dump.list Hash.pp)
has
end
module type DECODER = sig
module Hash : S.HASH
module Reference : Reference.S with module Hash := Hash
module Common :
COMMON with type hash := Hash.t and type reference := Reference.t
type decoder
val pp_decoder : decoder Fmt.t
type error =
[ `Expected_char of char
| `Unexpected_char of char
| `Unexpected_flush_pkt_line
| `No_assert_predicate of char -> bool
| `Expected_string of string
| `Unexpected_empty_pkt_line
| `Malformed_pkt_line
| `Unexpected_end_of_input
| `Unexpected_pkt_line
| `Unexpected_hashes of Hash.t * Hash.t ]
val pp_error : error Fmt.t
type 'a state =
| Ok of 'a
| Read of {buffer: Cstruct.t; off: int; len: int; continue: int -> 'a state}
| Error of {err: error; buf: Cstruct.t; committed: int}
type _ transaction =
| HttpReferenceDiscovery : string -> (Common.advertised_refs, [ `Msg of string ]) result transaction
| ReferenceDiscovery : (Common.advertised_refs, [ `Msg of string ]) result transaction
| ShallowUpdate : Common.shallow_update transaction
| Negociation : Hash.Set.t * ack_mode -> Common.acks transaction
| NegociationResult : Common.negociation_result transaction
| PACK : side_band -> flow transaction
| ReportStatus :
string list * side_band
-> Common.report_status transaction
| HttpReportStatus :
string list * side_band
-> Common.report_status transaction
| Upload_request : Common.upload_request transaction
| Git_proto_request : Common.git_proto_request transaction
| Update_request : Common.update_request transaction
and ack_mode = [`Ack | `Multi_ack | `Multi_ack_detailed]
and flow = [`Raw of Cstruct.t | `End | `Err of Cstruct.t | `Out of Cstruct.t]
and side_band = [`Side_band | `Side_band_64k | `No_multiplexe]
val decode : decoder -> 'result transaction -> 'result state
val decoder : unit -> decoder
val of_string :
string -> 'v transaction -> ('v, error * Cstruct.t * int) result
end
module type ENCODER = sig
module Hash : S.HASH
module Reference : Reference.S with module Hash := Hash
module Common :
COMMON with type hash := Hash.t and type reference := Reference.t
type encoder
val set_pos : encoder -> int -> unit
val free : encoder -> Cstruct.t
type 'a state =
| Write of
{ buffer: Cstruct.t
; off: int
; len: int
; continue: int -> 'a state }
| Ok of 'a
type action =
[ `GitProtoRequest of Common.git_proto_request
| `UploadRequest of Common.upload_request
| `HttpUploadRequest of [`Done | `Flush] * Common.http_upload_request
| `Advertised_refs of Common.advertised_refs
| `Shallow_update of Common.shallow_update
| `Negociation of Common.acks
| `Negociation_result of Common.negociation_result
| `Report_status of [`No_multiplexe | `Side_band | `Side_band_64k]
* Common.report_status
| `UpdateRequest of Common.update_request
| `HttpUpdateRequest of Common.update_request
| `Has of Hash.Set.t
| `Done
| `Flush
| `Shallow of Hash.t list
| `PACK of int ]
val encode : encoder -> action -> unit state
val encoder : unit -> encoder
val to_string : action -> string
end
module type CLIENT = sig
module Hash : S.HASH
module Reference : Reference.S with module Hash := Hash
module Common :
COMMON with type hash := Hash.t and type reference := Reference.t
module Decoder :
DECODER
with module Hash := Hash
and module Reference := Reference
and module Common := Common
module Encoder :
ENCODER
with module Hash := Hash
and module Reference := Reference
and module Common := Common
type context
type result =
[ `Refs of Common.advertised_refs
| `ShallowUpdate of Common.shallow_update
| `Negociation of Common.acks
| `NegociationResult of Common.negociation_result
| `PACK of Decoder.flow
| `Flush
| `Nothing
| `ReadyPACK of Cstruct.t
| `ReportStatus of Common.report_status
| `SmartError of string ]
type process =
[ `Read of Cstruct.t * int * int * (int -> process)
| `Write of Cstruct.t * int * int * (int -> process)
| `Error of Decoder.error * Cstruct.t * int
| result ]
type action =
[ `GitProtoRequest of Common.git_proto_request
| `Shallow of Hash.t list
| `UploadRequest of Common.upload_request
| `UpdateRequest of Common.update_request
| `Has of Hash.Set.t
| `Done
| `Flush
| `ReceivePACK
| `SendPACK of int
| `FinishPACK of Reference.Set.t ]
val capabilities : context -> Capability.t list
val set_capabilities : context -> Capability.t list -> unit
val encode : Encoder.action -> (context -> process) -> context -> process
val decode :
'a Decoder.transaction -> ('a -> context -> process) -> context -> process
val pp_result : result Fmt.t
val run : context -> action -> process
val context : Common.git_proto_request -> context * process
end
module Decoder
(Hash : S.HASH)
(Reference : Reference.S with module Hash := Hash)
(Common : COMMON with type hash := Hash.t and type reference := Reference.t) =
struct
module Log = struct
let src =
Logs.Src.create "git.smart.decoder" ~doc:"logs git's smart decoder event"
include (val Logs.src_log src : Logs.LOG)
end
type decoder =
{ mutable buffer: Cstruct.t
; mutable pos: int
; mutable eop: int option
; mutable max: int }
let decoder =
Cstruct.sub decoder.buffer decoder.pos (decoder.max - decoder.pos)
let pp_decoder ppf {buffer; pos; eop; max} =
let pp = Encore.Lole.pp_scalar ~get:Cstruct.get_char ~length:Cstruct.len in
match eop with
| Some eop ->
Fmt.pf ppf "{ @[<hov>current = %a;@ next = %a;@] }" (Fmt.hvbox pp)
(Cstruct.sub buffer pos eop)
(Fmt.hvbox pp)
(Cstruct.sub buffer eop max)
| None -> Fmt.pf ppf "#raw"
type error =
[ `Expected_char of char
| `Unexpected_char of char
| `Unexpected_flush_pkt_line
| `No_assert_predicate of char -> bool
| `Expected_string of string
| `Unexpected_empty_pkt_line
| `Malformed_pkt_line
| `Unexpected_end_of_input
| `Unexpected_pkt_line
| `Unexpected_hashes of Hash.t * Hash.t ]
let err_unexpected_end_of_input decoder =
`Unexpected_end_of_input, decoder.buffer, decoder.pos
let err_expected chr decoder =
`Expected_char chr, decoder.buffer, decoder.pos
let err_unexpected_char chr decoder =
`Unexpected_char chr, decoder.buffer, decoder.pos
let err_assert_predicate predicate decoder =
`No_assert_predicate predicate, decoder.buffer, decoder.pos
let err_expected_string s decoder =
`Expected_string s, decoder.buffer, decoder.pos
let err_unexpected_empty_pkt_line decoder =
`Unexpected_empty_pkt_line, decoder.buffer, decoder.pos
let err_malformed_pkt_line decoder =
`Malformed_pkt_line, decoder.buffer, decoder.pos
let err_unexpected_flush_pkt_line decoder =
`Unexpected_flush_pkt_line, decoder.buffer, decoder.pos
let err_unexpected_pkt_line decoder =
`Unexpected_pkt_line, decoder.buffer, decoder.pos
let err_unexpected_hashes h0 h1 decoder =
`Unexpected_hashes (h0, h1), decoder.buffer, decoder.pos
let pp_error ppf = function
| `Expected_char chr -> Fmt.pf ppf "(`Expected_char %c)" chr
| `Unexpected_char chr -> Fmt.pf ppf "(`Unexpected_char %c)" chr
| `No_assert_predicate _ -> Fmt.pf ppf "(`No_assert_predicate #predicate)"
| `Expected_string s -> Fmt.pf ppf "(`Expected_string %s)" s
| `Unexpected_empty_pkt_line -> Fmt.pf ppf "`Unexpected_empty_pkt_line"
| `Malformed_pkt_line -> Fmt.pf ppf "`Malformed_pkt_line"
| `Unexpected_end_of_input -> Fmt.pf ppf "`Unexpected_end_of_input"
| `Unexpected_flush_pkt_line -> Fmt.pf ppf "`Unexpected_flush_pkt_line"
| `Unexpected_pkt_line -> Fmt.pf ppf "`Unexpected_pkt_line"
| `Unexpected_hashes (h0, h1) ->
Fmt.pf ppf "(`Unexpeted_hashes (%a, %a))" Hash.pp h0 Hash.pp h1
type 'a state =
| Ok of 'a
| Read of {buffer: Cstruct.t; off: int; len: int; continue: int -> 'a state}
| Error of {err: error; buf: Cstruct.t; committed: int}
exception Leave of (error * Cstruct.t * int)
let p_return (type a) (x : a) _ : a state = Ok x
let p_safe k decoder : 'a state =
try k decoder with Leave (err, buf, pos) -> Error {err; buf; committed= pos}
let p_end_of_input decoder =
match decoder.eop with Some eop -> eop | None -> decoder.max
let p_peek_char decoder =
if decoder.pos < p_end_of_input decoder then
Some (Cstruct.get_char decoder.buffer decoder.pos)
else None
let p_current decoder =
if decoder.pos < p_end_of_input decoder then
Cstruct.get_char decoder.buffer decoder.pos
else raise (Leave (err_unexpected_end_of_input decoder))
let p_junk_char decoder =
if decoder.pos < p_end_of_input decoder then decoder.pos <- decoder.pos + 1
else raise (Leave (err_unexpected_end_of_input decoder))
let p_char chr decoder =
match p_peek_char decoder with
| Some chr' when chr' = chr -> p_junk_char decoder
| Some _ -> raise (Leave (err_expected chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder))
let p_satisfy predicate decoder =
match p_peek_char decoder with
| Some chr when predicate chr -> p_junk_char decoder ; chr
| Some _ -> raise (Leave (err_assert_predicate predicate decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder))
let p_space decoder = p_char ' ' decoder
let p_null decoder = p_char '\000' decoder
let p_while1 predicate decoder =
let i0 = decoder.pos in
while
decoder.pos < p_end_of_input decoder
&& predicate (Cstruct.get_char decoder.buffer decoder.pos)
do
decoder.pos <- decoder.pos + 1
done ;
if i0 < decoder.pos then Cstruct.sub decoder.buffer i0 (decoder.pos - i0)
else raise (Leave (err_unexpected_char (p_current decoder) decoder))
let p_while0 predicate decoder =
let i0 = decoder.pos in
while
decoder.pos < p_end_of_input decoder
&& predicate (Cstruct.get_char decoder.buffer decoder.pos)
do
decoder.pos <- decoder.pos + 1
done ;
Cstruct.sub decoder.buffer i0 (decoder.pos - i0)
let p_string s decoder =
let i0 = decoder.pos in
let ln = String.length s in
while
decoder.pos < p_end_of_input decoder
&& decoder.pos - i0 < ln
&& s.[decoder.pos - i0] = Cstruct.get_char decoder.buffer decoder.pos
do
decoder.pos <- decoder.pos + 1
done ;
if decoder.pos - i0 = ln then Cstruct.sub decoder.buffer i0 ln
else raise (Leave (err_expected_string s decoder))
let p_hexdigit decoder =
match
p_satisfy
(function '0' .. '9' | 'a' .. 'f' | 'A' .. 'F' -> true | _ -> false)
decoder
with
| '0' .. '9' as chr -> Char.code chr - 48
| 'a' .. 'f' as chr -> Char.code chr - 87
| 'A' .. 'F' as chr -> Char.code chr - 55
| _ -> assert false
let p_pkt_payload ?(strict = false) k decoder expect =
let pkt =
if expect < 0 then `Malformed
else if expect = 0 then `Empty
else `Line expect
in
if expect <= 0 then (
decoder.eop <- Some decoder.pos ;
k ~pkt decoder )
else (
if decoder.pos > 0 then (
Cstruct.blit decoder.buffer decoder.pos decoder.buffer 0
(decoder.max - decoder.pos) ;
decoder.max <- decoder.max - decoder.pos ;
decoder.pos <- 0 ) ;
let rec loop rest off =
if rest <= 0 then (
let off, pkt =
if
Cstruct.get_char decoder.buffer (off + rest - 1) = '\n'
&& not strict
then (
if rest < 0 then
Cstruct.blit decoder.buffer (off + rest) decoder.buffer
(off + rest - 1)
(off - (off + rest)) ;
off - 1, `Line (expect - 1) )
else off, `Line expect
in
decoder.max <- off ;
decoder.eop <- Some (off + rest) ;
p_safe (k ~pkt) decoder )
else if off >= Cstruct.len decoder.buffer then
raise (Invalid_argument "PKT Format: payload upper than 65520 bytes")
else
Read
{ buffer= decoder.buffer
; off
; len= Cstruct.len decoder.buffer - off
; continue= (fun n -> loop (rest - n) (off + n)) }
in
loop (expect - (decoder.max - decoder.pos)) decoder.max )
let p_pkt_len_safe ?(strict = false) k decoder =
let a = p_hexdigit decoder in
let b = p_hexdigit decoder in
let c = p_hexdigit decoder in
let d = p_hexdigit decoder in
let expect = (a * (16 * 16 * 16)) + (b * (16 * 16)) + (c * 16) + d in
if expect = 0 then (
decoder.eop <- Some decoder.pos ;
k ~pkt:`Flush decoder )
else p_pkt_payload ~strict k decoder (expect - 4)
let p_pkt_line ?(strict = false) k decoder =
decoder.eop <- None ;
if decoder.max - decoder.pos >= 4 then p_pkt_len_safe ~strict k decoder
else (
if decoder.pos > 0 then (
Cstruct.blit decoder.buffer decoder.pos decoder.buffer 0
(decoder.max - decoder.pos) ;
decoder.max <- decoder.max - decoder.pos ;
decoder.pos <- 0 ) ;
let rec loop off =
if off - decoder.pos >= 4 then (
decoder.max <- off ;
p_safe (p_pkt_len_safe ~strict k) decoder )
else if off >= Cstruct.len decoder.buffer then
raise (Invalid_argument "PKT Format: payload upper than 65520 bytes")
else
Read
{ buffer= decoder.buffer
; off
; len= Cstruct.len decoder.buffer - off
; continue= (fun n -> loop (off + n)) }
in
loop decoder.max )
let zero_id = String.make Hash.digest_size '\000' |> Hash.of_raw_string
let p_hash decoder =
p_while1 (function '0' .. '9' | 'a' .. 'f' -> true | _ -> false) decoder
|> Cstruct.to_string
|> Hash.of_hex
let p_capability decoder =
let capability =
p_while1
(function
| '\x61' .. '\x7a' | '0' .. '9' | '-' | '_' -> true | _ -> false)
decoder
|> Cstruct.to_string
in
match p_peek_char decoder with
| Some '=' ->
p_junk_char decoder ;
let value =
p_while1 (function '\033' .. '\126' -> true | _ -> false) decoder
|> Cstruct.to_string
in
Capability.of_string ~value capability
| _ -> Capability.of_string capability
let p_capabilities1 decoder =
let acc = [p_capability decoder] in
let rec loop acc =
match p_peek_char decoder with
| Some ' ' ->
p_junk_char decoder ;
let capability = p_capability decoder in
loop (capability :: acc)
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> List.rev acc
in
loop acc
let p_reference decoder =
let refname =
p_while1
(function
| ' ' | '~' | '^' | ':' | '?' | '*' -> false
| chr ->
let code = Char.code chr in
if code < 31 || code > 126 then false else true)
decoder
in
Reference.of_string (Cstruct.to_string refname)
let p_first_ref decoder =
let obj_id = p_hash decoder in
p_space decoder ;
let reference = p_reference decoder in
let peeled =
match p_peek_char decoder with
| Some '^' ->
p_char '^' decoder ; p_char '{' decoder ; p_char '}' decoder ; true
| Some _ -> false
| None -> raise (Leave (err_unexpected_end_of_input decoder))
in
p_null decoder ;
let capabilities =
match p_peek_char decoder with
| Some ' ' -> p_junk_char decoder ; p_capabilities1 decoder
| Some _ -> p_capabilities1 decoder
| None -> raise (Leave (err_unexpected_end_of_input decoder))
in
if
Hash.equal obj_id zero_id
&& Reference.to_string reference = "capabilities"
&& peeled
then `No_ref capabilities
else `Ref ((obj_id, reference, peeled), capabilities)
let p_shallow decoder =
let _ = p_string "shallow" decoder in
p_space decoder ;
let obj_id = p_hash decoder in
obj_id
let p_unshallow decoder =
let _ = p_string "unshallow" decoder in
p_space decoder ;
let obj_id = p_hash decoder in
obj_id
let p_other_ref decoder =
let obj_id = p_hash decoder in
p_space decoder ;
let reference = p_reference decoder in
let peeled =
match p_peek_char decoder with
| Some '^' ->
p_char '^' decoder ; p_char '{' decoder ; p_char '}' decoder ; true
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> false
in
obj_id, reference, peeled
type no_line = [`Empty | `Malformed | `Flush]
let err_expected_line decoder = function
| `Empty -> raise (Leave (err_unexpected_empty_pkt_line decoder))
| `Malformed -> raise (Leave (err_malformed_pkt_line decoder))
| `Flush -> raise (Leave (err_unexpected_flush_pkt_line decoder))
type no_line_and_flush = [`Empty | `Malformed]
let err_expected_line_or_flush decoder = function
| #no_line as v -> err_expected_line decoder v
let p_pkt_flush k decoder =
p_pkt_line
(fun ~pkt decoder ->
match pkt with
| #no_line_and_flush as v -> err_expected_line_or_flush decoder v
| `Flush -> k decoder
| `Line _ -> raise (Leave (err_unexpected_pkt_line decoder)) )
decoder
let p_advertised_refs ~pkt (advertised_refs : Common.advertised_refs) decoder
=
let rec go_shallows ~pkt (advertised_refs : Common.advertised_refs) decoder
=
match pkt with
| #no_line_and_flush as v -> err_expected_line_or_flush decoder v
| `Flush -> p_return (Rresult.R.ok advertised_refs) decoder
| `Line _ -> (
match p_peek_char decoder with
| Some 's' ->
let hash = p_shallow decoder in
p_pkt_line
(go_shallows
{advertised_refs with shallow= hash :: advertised_refs.shallow})
decoder
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder)) )
in
let rec go_other_refs ~pkt (advertised_refs : Common.advertised_refs)
decoder =
match pkt with
| #no_line_and_flush as v -> err_expected_line_or_flush decoder v
| `Flush -> p_return (Rresult.R.ok advertised_refs) decoder
| `Line _ -> (
match p_peek_char decoder with
| Some 's' -> go_shallows ~pkt advertised_refs decoder
| Some _ ->
let x = p_other_ref decoder in
p_pkt_line
(go_other_refs
{advertised_refs with refs= x :: advertised_refs.refs})
decoder
| None -> raise (Leave (err_unexpected_end_of_input decoder)) )
in
let go_first_ref ~pkt (advertised_refs : Common.advertised_refs) decoder =
match pkt with
| `Flush -> p_return (Rresult.R.ok advertised_refs) decoder
| #no_line as v -> err_expected_line decoder v
| `Line _ -> match p_peek_char decoder with
| None -> raise (Leave (err_unexpected_end_of_input decoder))
| Some 'E' ->
let err = p_while0 (fun _ -> true) decoder in
p_return (Rresult.R.error_msg (Cstruct.to_string err)) decoder
| Some _ -> match p_first_ref decoder with
| `No_ref capabilities ->
p_pkt_line
(go_shallows {advertised_refs with capabilities})
decoder
| `Ref (first, capabilities) ->
p_pkt_line
(go_other_refs {advertised_refs with capabilities; refs= [first]})
decoder in
go_first_ref ~pkt advertised_refs decoder
let p_http_advertised_refs ~service ~pkt decoder =
match pkt with
| #no_line as v -> err_expected_line decoder v
| `Line _ ->
match p_peek_char decoder with
| None -> raise (Leave (err_unexpected_end_of_input decoder))
| Some '#' ->
ignore @@ p_string "# service=" decoder ;
ignore @@ p_string service decoder ;
p_pkt_line
(fun ~pkt decoder ->
match pkt with
| #no_line_and_flush as v -> err_expected_line_or_flush decoder v
| `Flush ->
p_pkt_line
(p_advertised_refs {shallow= []; refs= []; capabilities= []})
decoder
| `Line _ as pkt ->
p_advertised_refs ~pkt
{shallow= []; refs= []; capabilities= []}
decoder )
decoder
| Some _ ->
let err = p_while0 (fun _ -> true) decoder in
p_return (Rresult.R.error_msg (Cstruct.to_string err)) decoder
let p_advertised_refs decoder =
p_pkt_line
(p_advertised_refs {shallow= []; refs= []; capabilities= []})
decoder
let p_http_advertised_refs ~service decoder =
p_pkt_line (p_http_advertised_refs ~service) decoder
let rec p_shallow_update ~pkt (shallow_update : Common.shallow_update)
decoder =
match pkt with
| #no_line_and_flush as v -> err_expected_line_or_flush decoder v
| `Flush -> p_return shallow_update decoder
| `Line _ -> (
match p_peek_char decoder with
| Some 's' ->
let x = p_shallow decoder in
p_pkt_line
(p_shallow_update
{shallow_update with shallow= x :: shallow_update.shallow})
decoder
| Some 'u' ->
let x = p_unshallow decoder in
p_pkt_line
(p_shallow_update
{shallow_update with unshallow= x :: shallow_update.unshallow})
decoder
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder)) )
let p_shallow_update decoder =
p_pkt_line (p_shallow_update {shallow= []; unshallow= []}) decoder
let p_multi_ack_detailed decoder =
ignore @@ p_string "ACK" decoder ;
p_space decoder ;
let hash = p_hash decoder in
let detail =
match p_peek_char decoder with
| None -> raise (Leave (err_unexpected_end_of_input decoder))
| Some ' ' -> (
p_junk_char decoder ;
match p_peek_char decoder with
| Some 'r' ->
ignore @@ p_string "ready" decoder ;
`Ready
| Some 'c' ->
ignore @@ p_string "common" decoder ;
`Common
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder)) )
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
in
hash, detail
let p_multi_ack decoder =
ignore @@ p_string "ACK" decoder ;
p_space decoder ;
let hash = p_hash decoder in
p_space decoder ;
ignore @@ p_string "continue" decoder ;
hash
let p_ack decoder =
ignore @@ p_string "ACK" decoder ;
p_space decoder ;
let hash = p_hash decoder in
hash
let p_negociation_result ~pkt k decoder =
match pkt with
| #no_line as v -> err_expected_line decoder v
| `Line _ -> (
match p_peek_char decoder with
| Some 'N' ->
ignore @@ p_string "NAK" decoder ;
k Common.NAK decoder
| Some 'A' ->
ignore @@ p_string "ACK" decoder ;
p_space decoder ;
let hash = p_hash decoder in
k (Common.ACK hash) decoder
| Some 'E' ->
ignore @@ p_string "ERR" decoder ;
p_space decoder ;
let msg = Cstruct.to_string @@ p_while1 (fun _ -> true) decoder in
k (Common.ERR msg) decoder
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder)) )
let p_negociation_one ~pkt ~mode k decoder =
match pkt with
| #no_line as v -> err_expected_line decoder v
| `Line _ -> (
match p_peek_char decoder, mode with
| Some 's', _ ->
let x = p_shallow decoder in
k (`Shallow x) decoder
| Some 'u', _ ->
let x = p_unshallow decoder in
k (`Unshallow x) decoder
| Some 'A', `Multi_ack_detailed ->
let hash, detail = p_multi_ack_detailed decoder in
k (`Ack (hash, detail)) decoder
| Some 'A', `Multi_ack ->
let hash = p_multi_ack decoder in
k (`Ack (hash, `Continue)) decoder
| Some 'A', `Ack ->
let hash = p_ack decoder in
k (`Ack (hash, `ACK)) decoder
| Some 'N', _ ->
ignore @@ p_string "NAK" decoder ;
k `Nak decoder
| Some chr, _ -> raise (Leave (err_unexpected_char chr decoder))
| None, _ -> raise (Leave (err_unexpected_end_of_input decoder)) )
let p_negociation ~mode k hashes (acks : Common.acks) decoder =
let rec go hashes (acks : Common.acks) v decoder =
match v with
| `Shallow hash ->
let acks = {acks with shallow= hash :: acks.shallow} in
p_pkt_line (p_negociation_one ~mode (go hashes acks)) decoder
| `Unshallow hash ->
let acks = {acks with unshallow= hash :: acks.unshallow} in
p_pkt_line (p_negociation_one ~mode (go hashes acks)) decoder
| `Ack (hash, `ACK) ->
k {acks with acks= [hash, `ACK]} decoder
| `Ack (hash, detail) ->
let hashes = Hash.Set.remove hash hashes in
let acks = {acks with acks= (hash, detail) :: acks.acks} in
p_pkt_line (p_negociation_one ~mode (go hashes acks)) decoder
| `Nak -> k acks decoder
in
p_pkt_line (p_negociation_one ~mode (go hashes acks)) decoder
let p_negociation ~mode hashes decoder =
p_negociation ~mode p_return hashes
{shallow= []; unshallow= []; acks= []}
decoder
let p_pack ~pkt ~mode decoder =
match pkt, mode with
| (#no_line_and_flush as v), _ -> err_expected_line_or_flush decoder v
| `Line n, `No_multiplexe ->
let raw = Cstruct.sub decoder.buffer decoder.pos n in
decoder.pos <- decoder.pos + n ;
p_return (`Raw raw) decoder
| `Flush, _ -> p_return `End decoder
| `Line n, (`Side_band_64k | `Side_band) -> (
let raw = Cstruct.sub decoder.buffer (decoder.pos + 1) (n - 1) in
match p_peek_char decoder with
| Some '\001' ->
decoder.pos <- decoder.pos + n ;
p_return (`Raw raw) decoder
| Some '\002' ->
decoder.pos <- decoder.pos + n ;
p_return (`Out raw) decoder
| Some '\003' ->
decoder.pos <- decoder.pos + n ;
p_return (`Err raw) decoder
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder)) )
let p_negociation_result decoder =
p_pkt_line (p_negociation_result p_return) decoder
let p_pack ~mode decoder = p_pkt_line ~strict:true (p_pack ~mode) decoder
let p_unpack decoder : (unit, string) result =
ignore @@ p_string "unpack" decoder ;
p_space decoder ;
let msg = p_while1 (fun _ -> true) decoder in
match Cstruct.to_string msg with "ok" -> Ok () | err -> Error err
let p_command_status decoder : (Reference.t, Reference.t * string) result =
let status = p_while1 (function ' ' -> false | _ -> true) decoder in
match Cstruct.to_string status with
| "ok" ->
p_space decoder ;
let reference = p_reference decoder in
Ok reference
| "ng" ->
p_space decoder ;
let reference = p_reference decoder in
p_space decoder ;
let msg = p_while1 (fun _ -> true) decoder |> Cstruct.to_string in
Error (reference, msg)
| _ -> raise (Leave (err_unexpected_char '\000' decoder))
let rec p_report_status ~pkt ~unpack ~commands ~sideband decoder =
let go unpack commands sideband decoder =
match p_peek_char decoder with
| Some 'u' ->
let unpack = p_unpack decoder in
p_pkt_line
(p_report_status ~unpack:(Some unpack) ~commands ~sideband)
decoder
| Some ('o' | 'n') ->
let command = p_command_status decoder in
let commands =
match commands with
| Some lst -> Some (command :: lst)
| None -> Some [command]
in
p_pkt_line (p_report_status ~unpack ~commands ~sideband) decoder
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder))
in
match pkt, sideband, unpack, commands with
| (#no_line_and_flush as v), _, _, _ ->
err_expected_line_or_flush decoder v
| `Flush, _, Some unpack, Some (_ :: _ as commands) ->
p_return {Common.unpack; commands} decoder
| `Flush, _, _, _ -> raise (Leave (err_unexpected_flush_pkt_line decoder))
| `Line _, (`Side_band | `Side_band_64k), _, _ -> (
match p_peek_char decoder with
| Some '\001' ->
p_junk_char decoder ;
go unpack commands sideband decoder
| Some '\002' ->
ignore @@ p_while0 (fun _ -> true) decoder ;
p_pkt_line (p_report_status ~unpack ~commands ~sideband) decoder
| Some '\003' ->
ignore @@ p_while0 (fun _ -> true) decoder ;
p_pkt_line (p_report_status ~unpack ~commands ~sideband) decoder
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_empty_pkt_line decoder)) )
| `Line _, `No_multiplexe, _, _ -> go unpack commands sideband decoder
let rec p_http_report_status ~pkt ?unpack ?(commands = []) ~sideband
~references decoder =
let go_unpack ~pkt k decoder =
match pkt with
| #no_line as v -> err_expected_line decoder v
| `Line _ -> (
match p_peek_char decoder with
| Some 'u' ->
let unpack = p_unpack decoder in
k unpack decoder
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder)) )
in
let go_command ~pkt kcons kfinal decoder =
match pkt with
| #no_line_and_flush as v -> err_expected_line_or_flush decoder v
| `Flush -> kfinal decoder
| `Line _ -> (
match p_peek_char decoder with
| Some ('o' | 'n') ->
let command = p_command_status decoder in
kcons command decoder
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder)) )
in
match pkt, sideband, unpack with
| (#no_line as v), _, _ -> err_expected_line decoder v
| `Line _, (`Side_band | `Side_band_64k), unpack -> (
match p_peek_char decoder with
| Some '\001' -> (
p_junk_char decoder ;
match unpack with
| None ->
let k unpack decoder =
p_pkt_line
(p_report_status ~sideband:`No_multiplexe ~unpack:(Some unpack) ~commands:None)
decoder in
p_pkt_line (go_unpack k) decoder
| Some unpack ->
let kcons command decoder =
p_pkt_line ~strict:true
(p_http_report_status ~unpack ~sideband
~commands:(command :: commands) ~references)
decoder
in
let kfinal decoder =
p_return {Common.unpack; commands} decoder
in
p_pkt_line (go_command kcons kfinal) decoder )
| Some '\002' ->
ignore @@ p_while0 (fun _ -> true) decoder ;
p_pkt_line
(p_http_report_status ?unpack ~commands ~sideband ~references)
decoder
| Some '\003' ->
ignore @@ p_while0 (fun _ -> true) decoder ;
p_pkt_line
(p_http_report_status ?unpack ~commands ~sideband ~references)
decoder
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder)) )
| (`Line _ as pkt), _, None ->
let k unpack decoder =
p_pkt_line ~strict:true
(p_http_report_status ~unpack ~sideband ~commands:[] ~references)
decoder in
go_unpack ~pkt k decoder
| (`Line _ as pkt), _, Some unpack ->
let kcons command decoder =
p_pkt_line ~strict:true
(p_http_report_status ~unpack ~sideband
~commands:(command :: commands) ~references)
decoder in
let kfinal decoder = p_return {Common.unpack; commands} decoder in
go_command ~pkt kcons kfinal decoder
let p_http_report_status references sideband decoder =
p_pkt_line ~strict:true
(p_http_report_status ~references ?unpack:None ~commands:[] ~sideband)
decoder
let p_first_want decoder =
ignore @@ p_string "want" decoder ;
p_space decoder ;
let obj_id = p_hash decoder in
p_space decoder ;
let capabilities = p_capabilities1 decoder in
obj_id, capabilities
let p_want decoder =
ignore @@ p_string "want" decoder ;
p_space decoder ;
let obj_id = p_hash decoder in
obj_id
type 'a intl = Int : int intl | Int64 : int64 intl
let p_int, p_int64 =
let go : type a. a intl -> decoder -> a =
fun intl decoder ->
let n =
Cstruct.to_string
@@ p_while1 (function '0' .. '9' -> true | _ -> false) decoder
in
match intl with Int -> int_of_string n | Int64 -> Int64.of_string n
in
go Int, go Int64
let p_deepen decoder =
ignore @@ p_string "deepen" decoder ;
match p_peek_char decoder with
| Some ' ' ->
p_junk_char decoder ;
`Depth (p_int decoder)
| Some '-' -> (
p_junk_char decoder ;
match p_peek_char decoder with
| Some 's' ->
ignore @@ p_string "since" decoder ;
p_space decoder ;
`Timestamp (p_int64 decoder)
| Some 'n' ->
ignore @@ p_string "not" decoder ;
p_space decoder ;
`Ref (p_reference decoder)
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder)) )
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder))
let p_upload_request decoder =
let go_deepen ~pkt (upload_request : Common.upload_request) decoder =
match pkt with
| #no_line_and_flush as v -> err_expected_line_or_flush decoder v
| `Flush -> p_return upload_request decoder
| `Line _ -> (
match p_peek_char decoder with
| Some 'd' ->
let deepen = p_deepen decoder in
p_pkt_flush
(p_return {upload_request with Common.deep= Some deepen})
decoder
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder)) )
in
let rec go_shallows ~pkt (upload_request : Common.upload_request) decoder =
match pkt with
| #no_line_and_flush as v -> err_expected_line_or_flush decoder v
| `Flush -> p_return upload_request decoder
| `Line _ -> (
match p_peek_char decoder with
| Some 's' ->
let shallow = p_shallow decoder in
p_pkt_line
(go_shallows
{ upload_request with
Common.shallow= shallow :: upload_request.shallow })
decoder
| Some 'd' -> go_deepen ~pkt upload_request decoder
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder)) )
in
let rec go_wants ~pkt (upload_request : Common.upload_request) decoder =
match pkt with
| #no_line_and_flush as v -> err_expected_line_or_flush decoder v
| `Flush -> p_return upload_request decoder
| `Line _ -> (
match p_peek_char decoder with
| Some 'w' ->
let want = p_want decoder in
p_pkt_line
(go_wants
{ upload_request with
Common.want=
( fst upload_request.Common.want
, want :: snd upload_request.Common.want ) })
decoder
| Some 's' -> go_shallows ~pkt upload_request decoder
| Some 'd' -> go_deepen ~pkt upload_request decoder
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder)) )
in
let go_first_want ~pkt decoder =
match pkt with
| #no_line as v -> err_expected_line decoder v
| `Line _ ->
let obj_id, capabilities = p_first_want decoder in
p_pkt_line
(go_wants
{Common.want= obj_id, []; capabilities; shallow= []; deep= None})
decoder
in
p_pkt_line go_first_want decoder
let p_request_command decoder =
ignore @@ p_string "git-" decoder ;
match p_peek_char decoder with
| Some 'r' ->
ignore @@ p_string "receive-pack" decoder ;
`Receive_pack
| Some 'u' -> (
ignore @@ p_string "upload-" decoder ;
match p_peek_char decoder with
| Some 'p' ->
ignore @@ p_string "pack" decoder ;
`Upload_pack
| Some 'a' ->
ignore @@ p_string "archive" decoder ;
`Upload_archive
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder)) )
| None -> raise (Leave (err_unexpected_end_of_input decoder))
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
let p_host decoder =
match p_peek_char decoder with
| None -> None
| Some _ -> (
ignore @@ p_string "host=" decoder ;
let host =
Cstruct.to_string
@@ p_while1 (function ':' | '\x00' -> false | _ -> true) decoder
in
match p_peek_char decoder with
| Some ':' ->
p_junk_char decoder ;
let port =
int_of_string
@@ Cstruct.to_string
@@ p_while1 (function '0' .. '9' -> true | _ -> false) decoder
in
p_junk_char decoder ;
Some (host, Some port)
| Some '\x00' ->
p_junk_char decoder ;
Some (host, None)
| Some chr -> raise (Leave (err_unexpected_char chr decoder))
| None -> raise (Leave (err_unexpected_end_of_input decoder)) )
let p_git_proto_request decoder =
let request_command = p_request_command decoder in
p_space decoder ;
let pathname =
Cstruct.to_string
@@ p_while1 (function '\x00' -> false | _ -> true) decoder
in
p_null decoder ;
let host = p_host decoder in
p_return {Common.request_command; pathname; host} decoder
let p_git_proto_request decoder =
p_pkt_line
(fun ~pkt decoder ->
match pkt with
| #no_line as v -> err_expected_line decoder v
| `Line _ -> p_git_proto_request decoder )
decoder
let p_command decoder =
let hash0 = p_hash decoder in
p_space decoder ;
let hash1 = p_hash decoder in
p_space decoder ;
let reference = p_reference decoder in
match Hash.equal zero_id hash0, Hash.equal zero_id hash1 with
| true, false -> Common.Create (hash1, reference)
| false, true -> Common.Delete (hash0, reference)
| false, false -> Common.Update (hash0, hash1, reference)
| true, true -> raise (Leave (err_unexpected_hashes hash0 hash1 decoder))
let p_first_command decoder =
let command = p_command decoder in
p_null decoder ;
let capabilities = p_capabilities1 decoder in
command, capabilities
let p_update_request decoder =
let rec p_commands (first, commands) ~pkt decoder =
match pkt with
| #no_line_and_flush as v -> err_expected_line_or_flush decoder v
| `Flush ->
let shallows, first, capabilities = first in
p_return
{ Common.shallow= shallows
; requests= `Raw (first, commands)
; capabilities }
decoder
| `Line _ ->
let command = p_command decoder in
p_pkt_line (p_commands (first, command :: commands)) decoder
in
let p_first_command shallows decoder =
let command, capabilities = p_first_command decoder in
p_pkt_line (p_commands ((shallows, command, capabilities), [])) decoder
in
let rec p_shallows shallows ~pkt decoder =
match pkt with
| #no_line as v -> err_expected_line decoder v
| `Line _ -> (
match p_peek_char decoder with
| Some 's' ->
let shallow = p_shallow decoder in
p_pkt_line (p_shallows (shallow :: shallows)) decoder
| Some _ -> p_first_command shallows decoder
| None -> raise (Leave (err_unexpected_end_of_input decoder)) )
in
p_pkt_line (p_shallows []) decoder
type _ transaction =
| HttpReferenceDiscovery : string -> (Common.advertised_refs, [ `Msg of string ]) result transaction
| ReferenceDiscovery : (Common.advertised_refs, [ `Msg of string ]) result transaction
| ShallowUpdate : Common.shallow_update transaction
| Negociation : Hash.Set.t * ack_mode -> Common.acks transaction
| NegociationResult : Common.negociation_result transaction
| PACK : side_band -> flow transaction
| ReportStatus : string list * side_band -> Common.report_status transaction
| HttpReportStatus :
string list * side_band
-> Common.report_status transaction
| Upload_request : Common.upload_request transaction
| Git_proto_request : Common.git_proto_request transaction
| Update_request : Common.update_request transaction
and ack_mode = [`Ack | `Multi_ack | `Multi_ack_detailed]
and flow = [`Raw of Cstruct.t | `End | `Err of Cstruct.t | `Out of Cstruct.t]
and side_band = [`Side_band | `Side_band_64k | `No_multiplexe]
let decode : type result. decoder -> result transaction -> result state =
fun decoder -> function
| HttpReferenceDiscovery service ->
p_safe (p_http_advertised_refs ~service) decoder
| ReferenceDiscovery -> p_safe p_advertised_refs decoder
| ShallowUpdate -> p_safe p_shallow_update decoder
| Negociation (hashes, ackmode) ->
p_safe (p_negociation ~mode:ackmode hashes) decoder
| NegociationResult -> p_safe p_negociation_result decoder
| PACK sideband -> p_safe (p_pack ~mode:sideband) decoder
| ReportStatus (refs, sideband) -> p_safe (p_http_report_status refs sideband) decoder
| HttpReportStatus (refs, sideband) ->
p_safe (p_http_report_status refs sideband) decoder
| Upload_request -> p_safe p_upload_request decoder
| Git_proto_request -> p_safe p_git_proto_request decoder
| Update_request -> p_safe p_update_request decoder
let decoder () = {buffer= Cstruct.create 65535; pos= 0; max= 0; eop= None}
let of_string : type v.
string -> v transaction -> (v, error * Cstruct.t * int) result =
fun s t ->
let decoder = decoder () in
let rec go consumed = function
| Ok v -> (Ok v : (v, error * Cstruct.t * int) result)
| Read {buffer; off; len; continue} ->
if consumed = String.length s then
( Error (err_unexpected_end_of_input decoder)
: (v, error * Cstruct.t * int) result )
else
let len = min (String.length s - consumed) len in
Cstruct.blit_from_string s consumed buffer off len ;
go (consumed + len) @@ continue len
| Error {err; buf; committed} ->
(Error (err, buf, committed) : (v, error * Cstruct.t * int) result)
in
go 0 @@ decode decoder t
end
module Encoder
(Hash : S.HASH)
(Reference : Reference.S with module Hash := Hash)
(Common : COMMON with type hash := Hash.t and type reference := Reference.t) =
struct
type encoder = {mutable payload: Cstruct.t; mutable pos: int}
let set_pos encoder pos = encoder.pos <- pos
let free {payload; pos} = Cstruct.sub payload pos (Cstruct.len payload - pos)
type 'a state =
| Write of
{ buffer: Cstruct.t
; off: int
; len: int
; continue: int -> 'a state }
| Ok of 'a
let flush k encoder =
if encoder.pos > 0 then
let rec k1 n =
if n < encoder.pos then
Write
{ buffer= encoder.payload
; off= n
; len= encoder.pos - n
; continue= (fun m -> k1 (n + m)) }
else (
encoder.pos <- 4 ;
k encoder )
in
k1 0
else k encoder
let writes s k encoder =
let _len = Cstruct.len encoder.payload in
let go j l encoder =
let rem = _len - encoder.pos in
let len = if l > rem then rem else l in
Cstruct.blit_from_string s j encoder.payload encoder.pos len ;
encoder.pos <- encoder.pos + len ;
if len < l then
raise (Invalid_argument "PKT Format: payload upper than 65520 bytes")
else k encoder
in
go 0 (String.length s) encoder
let w_lf k e = writes "\n" k e
let noop k encoder = k encoder
let pkt_line ?(lf = false) writes k encoder =
let pkt_len encoder =
let has = encoder.pos in
let hdr = Fmt.strf "%04x" has in
Cstruct.blit_from_string hdr 0 encoder.payload 0 4 ;
flush k encoder
in
writes ((if lf then w_lf else noop) @@ pkt_len) encoder
let pkt_flush k encoder =
Cstruct.blit_from_string "0000" 0 encoder.payload 0 4 ;
flush k encoder
let zero_id = String.make Hash.digest_size '\000' |> Hash.of_raw_string
let w_space k encoder = writes " " k encoder
let w_null k encoder = writes "\000" k encoder
let w_capabilities lst k encoder =
let rec loop lst encoder =
match lst with
| [] -> k encoder
| [x] -> writes (Capability.to_string x) k encoder
| x :: r ->
(writes (Capability.to_string x) @@ w_space @@ loop r) encoder
in
loop lst encoder
let w_hash hash k encoder = writes (Hash.to_hex hash) k encoder
let w_first_want obj_id capabilities k encoder =
( writes "want"
@@ w_space
@@ w_hash obj_id
@@ w_space
@@ w_capabilities capabilities k )
encoder
let w_want obj_id k encoder =
(writes "want" @@ w_space @@ w_hash obj_id k) encoder
let w_shallow obj_id k encoder =
(writes "shallow" @@ w_space @@ w_hash obj_id k) encoder
let w_deepen depth k encoder =
(writes "deepen" @@ w_space @@ writes (Fmt.strf "%d" depth) k) encoder
let w_deepen_since timestamp k encoder =
(writes "deepen-since" @@ w_space @@ writes (Fmt.strf "%Ld" timestamp) k)
encoder
let w_deepen_not reference k encoder =
(writes "deepen-not" @@ w_space @@ writes (Reference.to_string reference) k)
encoder
let w_first_want ?lf obj_id capabilities k encoder =
pkt_line ?lf (w_first_want obj_id capabilities) k encoder
let w_want ?lf obj_id k encoder = pkt_line ?lf (w_want obj_id) k encoder
let w_shallow ?lf obj_id k encoder =
pkt_line ?lf (w_shallow obj_id) k encoder
let w_deepen ?lf depth k encoder = pkt_line ?lf (w_deepen depth) k encoder
let w_deepen_since ?lf timestamp k encoder =
pkt_line ?lf (w_deepen_since timestamp) k encoder
let w_deepen_not ?lf reference k encoder =
pkt_line ?lf (w_deepen_not reference) k encoder
let w_done_and_lf k encoder = pkt_line ~lf:true (writes "done") k encoder
let w_list w l k encoder =
let rec aux l encoder =
match l with [] -> k encoder | x :: r -> w x (aux r) encoder
in
aux l encoder
let w_upload_request ?lf (upload_request : Common.upload_request) k encoder =
let first, rest = upload_request.want in
( w_first_want ?lf first upload_request.capabilities
@@ w_list (w_want ?lf) rest
@@ w_list (w_shallow ?lf) upload_request.shallow
@@ ( match upload_request.deep with
| Some (`Depth depth) -> w_deepen ?lf depth
| Some (`Timestamp t) -> w_deepen_since ?lf t
| Some (`Ref reference) -> w_deepen_not ?lf reference
| None -> noop )
@@ pkt_flush k )
encoder
let w_has hash k encoder =
(writes "have" @@ w_space @@ w_hash hash k) encoder
let w_has ?lf hash k encoder = pkt_line ?lf (w_has hash) k encoder
let w_http_upload_request at_the_end http_upload_request k encoder =
( w_upload_request ~lf:true
{ Common.want= http_upload_request.Common.want
; capabilities= http_upload_request.Common.capabilities
; shallow= http_upload_request.Common.shallow
; deep= http_upload_request.Common.deep }
@@ w_list (w_has ~lf:true) http_upload_request.has
@@ if at_the_end = `Done then w_done_and_lf k else pkt_flush k )
encoder
let w_flush k encoder = pkt_flush k encoder
let w_request_command request_command k encoder =
match request_command with
| `Upload_pack -> writes "git-upload-pack" k encoder
| `Receive_pack -> writes "git-receive-pack" k encoder
| `Upload_archive -> writes "git-upload-archive" k encoder
let w_git_proto_request git_proto_request k encoder =
let w_host host k encoder =
match host with
| Some (host, Some port) ->
( writes "host="
@@ writes host
@@ writes ":"
@@ writes (Fmt.strf "%d" port)
@@ w_null k )
encoder
| Some (host, None) ->
(writes "host=" @@ writes host @@ w_null k) encoder
| None -> noop k encoder
in
( w_request_command git_proto_request.Common.request_command
@@ w_space
@@ writes git_proto_request.pathname
@@ w_null
@@ w_host git_proto_request.host k )
encoder
let w_done k encoder = pkt_line (writes "done") k encoder
let w_has hashes k encoder =
let rec go l encoder =
match l with
| [] -> w_flush k encoder
| x :: r -> (w_has x @@ go r) encoder
in
go (Hash.Set.elements hashes) encoder
let w_git_proto_request git_proto_request k encoder =
pkt_line (w_git_proto_request git_proto_request) k encoder
let w_shallows l k encoder =
let rec go l encoder =
match l with
| [] -> k encoder
| x :: r ->
pkt_line
(fun k -> writes "shallow" @@ w_space @@ w_hash x k)
(go r) encoder
in
go l encoder
let w_command command k encoder =
match command with
| Common.Create (hash, reference) ->
( w_hash zero_id
@@ w_space
@@ w_hash hash
@@ w_space
@@ writes (Reference.to_string reference) k )
encoder
| Common.Delete (hash, reference) ->
( w_hash hash
@@ w_space
@@ w_hash zero_id
@@ w_space
@@ writes (Reference.to_string reference) k )
encoder
| Common.Update (old_id, new_id, reference) ->
( w_hash old_id
@@ w_space
@@ w_hash new_id
@@ w_space
@@ writes (Reference.to_string reference) k )
encoder
let w_first_command capabilities first k encoder =
(w_command first @@ w_null @@ w_capabilities capabilities k) encoder
let w_first_command capabilities first k encoder =
pkt_line (w_first_command capabilities first) k encoder
let w_command command k encoder = pkt_line (w_command command) k encoder
let w_commands capabilities (first, rest) k encoder =
(w_first_command capabilities first @@ w_list w_command rest @@ pkt_flush k)
encoder
let w_push_certificates capabilities push_cert k encoder =
( (fun k e ->
pkt_line ~lf:true
(fun k ->
writes "push-cert" @@ w_null @@ w_capabilities capabilities k )
k e )
@@ (fun k e -> pkt_line ~lf:true (writes "certificate version 0.1") k e)
@@ (fun k e ->
pkt_line ~lf:true
(fun k ->
writes "pusher" @@ w_space @@ writes push_cert.Common.pusher k )
k e )
@@ (fun k e ->
pkt_line ~lf:true
(fun k ->
writes "pushee" @@ w_space @@ writes push_cert.Common.pushee k )
k e )
@@ (fun k e ->
pkt_line ~lf:true
(fun k ->
writes "nonce" @@ w_space @@ writes push_cert.Common.nonce k )
k e )
@@ (fun k e ->
w_list
(fun x k e ->
pkt_line ~lf:true
(fun k -> writes "push-option" @@ w_space @@ writes x k)
k e )
push_cert.Common.options k e )
@@ (fun k e -> pkt_line ~lf:true noop k e)
@@ (fun k e ->
w_list
(fun x k e -> pkt_line ~lf:true (w_command x) k e)
push_cert.Common.commands k e )
@@ (fun k e ->
w_list
(fun x k e -> pkt_line ~lf:true (writes x) k e)
push_cert.Common.gpg k e )
@@ (fun k e -> pkt_line ~lf:true (writes "push-cert-end") k e)
@@ pkt_flush
@@ k )
encoder
let w_update_request (update_request : Common.update_request) k encoder =
( w_shallows update_request.Common.shallow
@@ ( match update_request.Common.requests with
| `Raw commands ->
w_commands update_request.Common.capabilities commands
| `Cert push_cert ->
w_push_certificates update_request.Common.capabilities push_cert )
@@ k )
encoder
let flush_pack k encoder =
if encoder.pos > 0 then
let rec k1 n =
if n < encoder.pos then
Write
{ buffer= encoder.payload
; off= n
; len= encoder.pos - n
; continue= (fun m -> k1 (n + m)) }
else (
encoder.pos <- 0 ;
k encoder )
in
k1 0
else k encoder
let w_pack n k encoder =
encoder.pos <- encoder.pos + n ;
flush_pack k encoder
let w_http_update_request i k encoder = w_update_request i k encoder
let w_advertised_refs (advertised_refs : Common.advertised_refs) k encoder =
let w_ref (hash, reference, peeled) k encoder =
( w_hash hash
@@ w_space
@@ writes (Reference.to_string reference)
@@ match peeled with true -> writes "^{}" k | false -> k )
encoder
in
match advertised_refs.Common.refs with
| [] ->
pkt_line
(fun k ->
w_hash zero_id
@@ w_space
@@ writes "capabilities^{}"
@@ w_null
@@ w_capabilities advertised_refs.Common.capabilities k )
(w_shallows advertised_refs.Common.shallow (pkt_flush k))
encoder
| first :: refs ->
let rec go refs encoder =
match refs with
| [] ->
w_shallows advertised_refs.Common.shallow (pkt_flush k) encoder
| reference :: refs -> pkt_line (w_ref reference) (go refs) encoder
in
pkt_line
(fun k ->
w_ref first
@@ w_null
@@ w_capabilities advertised_refs.Common.capabilities k )
(go refs) encoder
let w_shallow hash k encoder =
pkt_line (fun k -> writes "shallow" @@ w_space @@ w_hash hash k) k encoder
let w_unshallow hash k encoder =
pkt_line
(fun k -> writes "unshallow" @@ w_space @@ w_hash hash k)
k encoder
let w_shallow_update (shallow_update : Common.shallow_update) k encoder =
let rec go (shallow_update : Common.shallow_update) encoder =
match shallow_update.shallow with
| hash :: shallow ->
w_shallow hash (go {shallow_update with shallow}) encoder
| [] -> (
match shallow_update.unshallow with
| hash :: unshallow ->
w_unshallow hash (go {shallow_update with unshallow}) encoder
| [] -> pkt_flush k encoder )
in
go shallow_update encoder
let w_negociation_one value k encoder =
match value with
| `Ack (hash, `Continue) ->
pkt_line
(fun k ->
writes "ACK"
@@ w_space
@@ w_hash hash
@@ w_space
@@ writes "continue" k )
k encoder
| `Ack (hash, `Common) ->
pkt_line
(fun k ->
writes "ACK"
@@ w_space
@@ w_hash hash
@@ w_space
@@ writes "common" k )
k encoder
| `Ack (hash, `Ready) ->
pkt_line
(fun k ->
writes "ACK"
@@ w_space
@@ w_hash hash
@@ w_space
@@ writes "ready" k )
k encoder
| `Ack (hash, `ACK) ->
pkt_line (fun k -> writes "ACK" @@ w_space @@ w_hash hash k) k encoder
| `Nak -> pkt_line (writes "NAK") k encoder
let w_negociation (acks : Common.acks) k encoder =
let rec go_ack acks encoder =
match acks with
| [] -> w_negociation_one `Nak k encoder
| ack :: acks -> w_negociation_one (`Ack ack) (go_ack acks) encoder
in
let rec go_unshallow unshallows encoder =
match unshallows with
| [] -> go_ack acks.acks encoder
| hash :: rest -> w_unshallow hash (go_unshallow rest) encoder
in
let rec go_shallow shallows encoder =
match shallows with
| [] -> go_unshallow acks.unshallow encoder
| hash :: rest -> w_shallow hash (go_shallow rest) encoder
in
go_shallow acks.shallow encoder
let w_negociation_result result k encoder =
match result with
| Common.NAK -> pkt_line (writes "NAK") k encoder
| Common.ACK hash ->
pkt_line (fun k -> writes "ACK" @@ w_space @@ w_hash hash k) k encoder
| Common.ERR err ->
pkt_line (fun k -> writes "ERR" @@ w_space @@ writes err k) k encoder
let w_report_status ~sideband report_status k encoder =
let w_reference reference k encoder =
writes (Reference.to_string reference) k encoder
in
let go_command (command : (Reference.t, Reference.t * string) result) k
encoder =
match command with
| Ok reference ->
(writes "ok" @@ w_space @@ w_reference reference k) encoder
| Error (reference, err) ->
( writes "ng"
@@ w_space
@@ w_reference reference
@@ w_space
@@ writes err k )
encoder
in
let rec go_commands commands encoder =
match sideband, commands with
| _, [] -> pkt_flush k encoder
| `No_multiplexe, command :: commands ->
pkt_line (go_command command) (go_commands commands) encoder
| (`Side_band | `Side_band_64k), command :: commands ->
pkt_line
(fun k -> writes "\001" @@ go_command command k)
(go_commands commands) encoder
in
let go_unpack k encoder =
match report_status.Common.unpack with
| Ok () -> writes "unpack ok" k encoder
| Error err -> (writes "unpack" @@ w_space @@ writes err k) encoder
in
match sideband with
| `No_multiplexe ->
pkt_line go_unpack (go_commands report_status.Common.commands) encoder
| `Side_band | `Side_band_64k ->
pkt_line
(fun k -> writes "\001" @@ go_unpack k)
(go_commands report_status.Common.commands)
encoder
type action =
[ `GitProtoRequest of Common.git_proto_request
| `UploadRequest of Common.upload_request
| `HttpUploadRequest of [`Done | `Flush] * Common.http_upload_request
| `Advertised_refs of Common.advertised_refs
| `Shallow_update of Common.shallow_update
| `Negociation of Common.acks
| `Negociation_result of Common.negociation_result
| `Report_status of [`No_multiplexe | `Side_band | `Side_band_64k]
* Common.report_status
| `UpdateRequest of Common.update_request
| `HttpUpdateRequest of Common.update_request
| `Has of Hash.Set.t
| `Done
| `Flush
| `PACK of int
| `Shallow of Hash.t list ]
let encode encoder = function
| `GitProtoRequest c -> w_git_proto_request c (fun _ -> Ok ()) encoder
| `UploadRequest i -> w_upload_request i (fun _ -> Ok ()) encoder
| `HttpUploadRequest (v, i) ->
w_http_upload_request v i (fun _ -> Ok ()) encoder
| `Advertised_refs v -> w_advertised_refs v (fun _ -> Ok ()) encoder
| `Shallow_update v -> w_shallow_update v (fun _ -> Ok ()) encoder
| `Negociation v -> w_negociation v (fun _ -> Ok ()) encoder
| `Negociation_result v -> w_negociation_result v (fun _ -> Ok ()) encoder
| `Report_status (s, v) ->
w_report_status ~sideband:s v (fun _ -> Ok ()) encoder
| `UpdateRequest i -> w_update_request i (fun _ -> Ok ()) encoder
| `HttpUpdateRequest i -> w_http_update_request i (fun _ -> Ok ()) encoder
| `Has l -> w_has l (fun _ -> Ok ()) encoder
| `Done -> w_done (fun _ -> Ok ()) encoder
| `Flush -> w_flush (fun _ -> Ok ()) encoder
| `Shallow l -> w_shallows l (fun _ -> Ok ()) encoder
| `PACK n -> w_pack n (fun _ -> Ok ()) encoder
let encoder () = {payload= Cstruct.create 65535; pos= 4}
let to_string v =
let encoder = encoder () in
let result = Buffer.create 16 in
let rec go = function
| Write {buffer; off; len; continue} ->
Buffer.add_string result
(Cstruct.to_string (Cstruct.sub buffer off len)) ;
go @@ continue len
| Ok () -> Buffer.contents result
in
go @@ encode encoder v
end
module Client
(Hash : S.HASH)
(Reference : Reference.S with module Hash := Hash) =
struct
module Common = Common (Hash) (Reference)
module Decoder = Decoder (Hash) (Reference) (Common)
module Encoder = Encoder (Hash) (Reference) (Common)
type context =
{ decoder: Decoder.decoder
; encoder: Encoder.encoder
; mutable capabilities: Capability.t list }
let capabilities {capabilities; _} = capabilities
let set_capabilities context capabilities =
context.capabilities <- capabilities
let encode x k ctx =
let rec loop = function
| Encoder.Write {buffer; off; len; continue} ->
`Write (buffer, off, len, fun n -> loop (continue n))
| Encoder.Ok () -> k ctx
in
loop (Encoder.encode ctx.encoder x)
let decode phase k ctx =
let rec loop = function
| Decoder.Ok v -> k v ctx
| Decoder.Read {buffer; off; len; continue} ->
`Read (buffer, off, len, fun n -> loop (continue n))
| Decoder.Error {err; buf; committed} -> `Error (err, buf, committed)
in
loop (Decoder.decode ctx.decoder phase)
type result =
[ `Refs of Common.advertised_refs
| `ShallowUpdate of Common.shallow_update
| `Negociation of Common.acks
| `NegociationResult of Common.negociation_result
| `PACK of Decoder.flow
| `Flush
| `Nothing
| `ReadyPACK of Cstruct.t
| `ReportStatus of Common.report_status
| `SmartError of string ]
type process =
[ `Read of Cstruct.t * int * int * (int -> process)
| `Write of Cstruct.t * int * int * (int -> process)
| `Error of Decoder.error * Cstruct.t * int
| result ]
let pp_result ppf = function
| `Refs refs ->
Fmt.pf ppf "(`Refs %a)" (Fmt.hvbox Common.pp_advertised_refs) refs
| `ShallowUpdate shallow_update ->
Fmt.pf ppf "(`ShallowUpdate %a)"
(Fmt.hvbox Common.pp_shallow_update)
shallow_update
| `Negociation acks ->
Fmt.pf ppf "(`Negociation %a)" (Fmt.hvbox Common.pp_acks) acks
| `NegociationResult result ->
Fmt.pf ppf "(`NegociationResult %a)"
(Fmt.hvbox Common.pp_negociation_result)
result
| `PACK (`Err _) -> Fmt.pf ppf "(`Pack stderr)"
| `PACK (`Out _) -> Fmt.pf ppf "(`Pack stdout)"
| `PACK (`Raw _) -> Fmt.pf ppf "(`Pack pack)"
| `PACK `End -> Fmt.pf ppf "(`Pack `End)"
| `Flush -> Fmt.pf ppf "`Flush"
| `Nothing -> Fmt.pf ppf "`Nothing"
| `ReadyPACK _ -> Fmt.pf ppf "(`ReadyPACK #raw)"
| `ReportStatus status ->
Fmt.pf ppf "(`ReportStatus %a)"
(Fmt.hvbox Common.pp_report_status)
status
| `SmartError err -> Fmt.pf ppf "(`SmartError %S)" err
type action =
[ `GitProtoRequest of Common.git_proto_request
| `Shallow of Hash.t list
| `UploadRequest of Common.upload_request
| `UpdateRequest of Common.update_request
| `Has of Hash.Set.t
| `Done
| `Flush
| `ReceivePACK
| `SendPACK of int
| `FinishPACK of Reference.Set.t ]
let run context = function
| `GitProtoRequest c ->
encode (`GitProtoRequest c)
(decode Decoder.ReferenceDiscovery (fun refs ctx -> match refs with
| Ok refs -> ctx.capabilities <- refs.Common.capabilities ; `Refs refs
| Error (`Msg err) -> `SmartError err))
context
| `Flush -> encode `Flush (fun _ -> `Flush) context
| `UploadRequest (descr : Common.upload_request) ->
let common =
List.filter
(fun x -> List.exists (( = ) x) context.capabilities)
descr.Common.capabilities
in
context.capabilities <- common ;
let next =
match descr.Common.deep with
| Some (`Depth n) ->
if n > 0 then
decode Decoder.ShallowUpdate (fun shallow_update _ ->
`ShallowUpdate shallow_update )
else fun _ ->
`ShallowUpdate
({shallow= []; unshallow= []} : Common.shallow_update)
| _ ->
fun _ ->
`ShallowUpdate
({shallow= []; unshallow= []} : Common.shallow_update)
in
encode (`UploadRequest descr) next context
| `UpdateRequest (descr : Common.update_request) ->
let common =
List.filter
(fun x -> List.exists (( = ) x) context.capabilities)
descr.Common.capabilities
in
context.capabilities <- common ;
encode (`UpdateRequest descr)
(fun {encoder; _} ->
Encoder.set_pos encoder 0 ;
let raw = Encoder.free encoder in
`ReadyPACK raw )
context
| `Has has ->
let ackmode =
if List.exists (( = ) `Multi_ack_detailed) context.capabilities then
`Multi_ack_detailed
else if List.exists (( = ) `Multi_ack) context.capabilities then
`Multi_ack
else `Ack
in
encode (`Has has)
(decode
(Decoder.Negociation (has, ackmode))
(fun status _ -> `Negociation status))
context
| `Done ->
encode `Done
(decode Decoder.NegociationResult (fun result _ ->
`NegociationResult result ))
context
| `ReceivePACK ->
let sideband =
if List.exists (( = ) `Side_band_64k) context.capabilities then
`Side_band_64k
else if List.exists (( = ) `Side_band) context.capabilities then
`Side_band
else `No_multiplexe
in
(decode (Decoder.PACK sideband) (fun flow _ -> `PACK flow)) context
| `SendPACK w ->
encode (`PACK w)
(fun {encoder; _} ->
Encoder.set_pos encoder 0 ;
let raw = Encoder.free encoder in
`ReadyPACK raw )
context
| `FinishPACK refs ->
let sideband =
if List.exists (( = ) `Side_band_64k) context.capabilities then
`Side_band_64k
else if List.exists (( = ) `Side_band) context.capabilities then
`Side_band
else `No_multiplexe
in
if List.exists (( = ) `Report_status) context.capabilities then
decode (Decoder.ReportStatus (List.map Reference.to_string (Reference.Set.elements refs), sideband))
(fun result _ -> `ReportStatus result)
context
else `Nothing
| `Shallow l -> encode (`Shallow l) (fun _ -> `Nothing) context
let context c =
let context =
{ decoder= Decoder.decoder ()
; encoder= Encoder.encoder ()
; capabilities= [] }
in
( context
, encode (`GitProtoRequest c)
(decode Decoder.ReferenceDiscovery (fun refs ctx -> match refs with
| Ok refs -> ctx.capabilities <- refs.Common.capabilities ; `Refs refs
| Error (`Msg err) -> `SmartError err))
context )
end