/
xmlHttpRequest.ml
299 lines (272 loc) · 9.35 KB
/
xmlHttpRequest.ml
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
(* Js_of_ocaml library
* http://www.ocsigen.org/js_of_ocaml/
* Copyright (C) 2010 Jérôme Vouillon
* Laboratoire PPS - CNRS Université Paris Diderot
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, with linking exception;
* either version 2.1 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*)
open Lwt
open Js
type readyState = UNSENT | OPENED | HEADERS_RECEIVED | LOADING | DONE
class type xmlHttpRequest = object ('self)
method onreadystatechange : (unit -> unit) Js.callback Js.writeonly_prop
method readyState : readyState readonly_prop
method _open :
js_string t -> js_string t -> bool t -> unit meth
method _open_full :
js_string t -> js_string t -> bool t ->
js_string t opt -> js_string t opt -> unit meth
method setRequestHeader : js_string t -> js_string t -> unit meth
method overrideMimeType : js_string t -> unit meth
method send : js_string t opt -> unit meth
method send_document : Dom.element Dom.document -> unit meth
method send_formData : Form.formData t -> unit meth
method abort : unit meth
method status : int readonly_prop
method statusText : js_string t readonly_prop
method getResponseHeader : js_string t -> js_string t opt meth
method getAllResponseHeaders : js_string t meth
method responseText : js_string t readonly_prop
method responseXML : Dom.element Dom.document t opt readonly_prop
inherit File.progressEventTarget
method ontimeout : ('self t, 'self File.progressEvent t) Dom.event_listener writeonly_prop
method upload : xmlHttpRequestUpload t optdef readonly_prop
end
and xmlHttpRequestUpload = object ('self)
inherit File.progressEventTarget
end
module Event = struct
type typ = xmlHttpRequest File.progressEvent t Dom.Event.typ
let readystatechange = Dom.Event.make "readystatechange"
let loadstart = Dom.Event.make "loadstart"
let progress = Dom.Event.make "progress"
let abort = Dom.Event.make "abort"
let error = Dom.Event.make "error"
let load = Dom.Event.make "load"
let timeout = Dom.Event.make "timeout"
let loadend = Dom.Event.make "loadend"
end
class type xmlHttpRequest_binary = object
inherit xmlHttpRequest
method sendAsBinary : js_string t opt -> unit meth
method sendAsBinary_presence : unit optdef readonly_prop
end
let create () : xmlHttpRequest Js.t =
try jsnew (Js.Unsafe.global##_XMLHttpRequest)() with _ ->
try jsnew (Js.Unsafe.global##activeXObject)(Js.string "Msxml2.XMLHTTP") with _ ->
try jsnew (Js.Unsafe.global##activeXObject)(Js.string "Msxml3.XMLHTTP") with _ ->
try jsnew (Js.Unsafe.global##activeXObject)(Js.string "Microsoft.XMLHTTP") with _ ->
assert false
let encode = Url.encode_arguments
let encode_url args =
let args = List.map (fun (n,v) -> to_string n,to_string v) args in
string (Url.encode_arguments args)
let generateBoundary () =
let nine_digits () =
string_of_int (truncate (Js.math##random() *. 1000000000.))
in
"js_of_ocaml-------------------" ^ nine_digits () ^ nine_digits ()
(* TODO: test with elements = [] *)
let encode_multipart boundary elements =
let b = jsnew array_empty () in
(Lwt_list.iter_s
(fun v ->
ignore(b##push(Js.string ("--"^boundary^"\r\n")));
match v with
| name, `String value ->
ignore(b##push_3(Js.string ("Content-Disposition: form-data; name=\"" ^ name ^ "\"\r\n\r\n"),
value,
Js.string "\r\n"));
return ()
| name, `File value ->
File.readAsBinaryString (value :> File.blob Js.t)
>>= (fun file ->
ignore(b##push_4(Js.string ("Content-Disposition: form-data; name=\"" ^ name ^ "\"; filename=\""),
File.filename value,
Js.string "\"\r\n",
Js.string "Content-Type: application/octet-stream\r\n"));
ignore(b##push_3(Js.string "\r\n",
file,
Js.string "\r\n"));
return ())
)
elements)
>|= ( fun () -> ignore(b##push(Js.string ("--"^boundary^"--\r\n"))); b )
let encode_url l =
String.concat "&"
(List.map
(function
| name,`String s -> ((Url.urlencode name) ^ "=" ^ (Url.urlencode (to_string s)))
| name,`File s -> ((Url.urlencode name) ^ "=" ^ (Url.urlencode (to_string (s##name))))
) l)
(* Higher level interface: *)
(** type of the http headers *)
type http_frame =
{
url: string;
code: int;
headers: string -> string option;
content: string;
content_xml: unit -> Dom.element Dom.document t option;
}
exception Wrong_headers of (int * (string -> string option))
let extract_get_param url =
let open Url in
match url_of_string url with
| Some (Http url) ->
Url.string_of_url (Http { url with hu_arguments = [] }),
url.hu_arguments
| Some (Https url) ->
Url.string_of_url (Https { url with hu_arguments = [] }),
url.hu_arguments
| _ -> url, []
let perform_raw_url
?(headers = [])
?content_type
?(post_args:(string * Form.form_elt) list option)
?(get_args=[])
?(form_arg:Form.form_contents option)
?(check_headers=(fun _ _ -> true))
?progress
?upload_progress
?override_mime_type
url =
let form_arg =
match form_arg with
| None ->
(match post_args with
| None -> None
| Some post_args ->
let contents = Form.empty_form_contents () in
List.iter (fun (name, value) ->
Form.append contents (name, value))
post_args;
Some contents)
| Some form_arg ->
(match post_args with
| None -> ()
| Some post_args ->
List.iter (fun (name, value) ->
Form.append form_arg (name, value))
post_args);
Some form_arg
in
let method_, content_type =
match form_arg, content_type with
| None, ct -> "GET", ct
| Some form_args, None ->
(match form_args with
| `Fields strings ->
"POST", Some "application/x-www-form-urlencoded"
| `FormData f -> "POST", None)
| Some _, ct -> "POST", ct
in
let url, url_get = extract_get_param url in
let url = match url_get@get_args with
| [] -> url
| _::_ as l -> url ^ "?" ^ encode l
in
let (res, w) = Lwt.task () in
let req = create () in
begin match override_mime_type with
None -> ()
| Some mime_type -> req ## overrideMimeType (Js.string mime_type)
end;
req##_open (Js.string method_, Js.string url, Js._true);
(match content_type with
| Some content_type ->
req##setRequestHeader (Js.string "Content-type", Js.string content_type)
| _ -> ());
List.iter (fun (n, v) -> req##setRequestHeader (Js.string n, Js.string v))
headers;
let headers s =
Opt.case
(req##getResponseHeader (Js.bytestring s))
(fun () -> None)
(fun v -> Some (Js.to_string v))
in
let do_check_headers =
let checked = ref false in
fun () ->
if not (!checked) && not (check_headers (req##status) headers)
then begin
Lwt.wakeup_exn w (Wrong_headers ((req##status),headers));
req##abort ();
end;
checked := true
in
req##onreadystatechange <- Js.wrap_callback
(fun _ ->
(match req##readyState with
(* IE doesn't have the same semantics for HEADERS_RECEIVED.
so we wait til LOADING to check headers. See:
http://msdn.microsoft.com/en-us/library/ms534361(v=vs.85).aspx *)
| HEADERS_RECEIVED when not Dom_html.onIE -> do_check_headers ()
| LOADING when Dom_html.onIE -> do_check_headers ()
| DONE ->
(* If we didn't catch a previous event, we check the header. *)
do_check_headers ();
Lwt.wakeup w
{url = url;
code = req##status;
content = Js.to_string req##responseText;
content_xml =
(fun () ->
match Js.Opt.to_option (req##responseXML) with
| None -> None
| Some doc ->
if (Js.some doc##documentElement) == Js.null
then None
else Some doc);
headers = headers
}
| _ -> ()));
begin match progress with
| Some progress ->
req##onprogress <- Dom.handler
(fun e ->
progress e##loaded e##total;
Js._true)
| None -> ()
end;
Optdef.iter (req##upload) (fun upload ->
match upload_progress with
| Some upload_progress ->
upload##onprogress <- Dom.handler
(fun e ->
upload_progress e##loaded e##total;
Js._true)
| None -> ()
);
(match form_arg with
| None -> req##send (Js.null)
| Some (`Fields l) ->
ignore (req##send(Js.some (string (encode_url !l)));return ())
| Some (`FormData f) -> req##send_formData(f));
Lwt.on_cancel res (fun () -> req##abort ()) ;
res
let perform
?(headers = [])
?content_type
?post_args
?(get_args=[])
?form_arg
?check_headers
?override_mime_type
url =
perform_raw_url ~headers ?content_type ?post_args ~get_args ?form_arg
?check_headers ?override_mime_type
(Url.string_of_url url)
let get s = perform_raw_url s