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import std/strutils
import std/tables
import chagashi/charset
import chagashi/decoder
import img/bitmap
import io/dynstream
import io/promise
import loader/headers
import loader/request
import monoucha/javascript
import monoucha/jserror
import monoucha/quickjs
import types/blob
import types/color
import types/opt
import types/url
import utils/mimeguess
import utils/twtstr
type
ResponseType* = enum
rtDefault = "default"
rtBasic = "basic"
rtCors = "cors"
rtError = "error"
rtOpaque = "opaque"
rtOpaquedirect = "opaqueredirect"
ResponseFlag* = enum
rfAborted
Response* = ref object
responseType* {.jsget: "type".}: ResponseType
res*: int
body*: SocketStream
bodyUsed* {.jsget.}: bool
status* {.jsget.}: uint16
headers* {.jsget.}: Headers
url*: URL #TODO should be urllist?
unregisterFun*: proc()
resumeFun*: proc(outputId: int)
bodyRead*: EmptyPromise
internalMessage*: string # should NOT be exposed to JS!
outputId*: int
onRead*: proc(response: Response) {.nimcall.}
opaque*: RootRef
flags*: set[ResponseFlag]
jsDestructor(Response)
proc newResponse*(res: int; request: Request; stream: SocketStream;
outputId: int; status: uint16): Response =
return Response(
res: res,
url: request.url,
body: stream,
bodyRead: EmptyPromise(),
outputId: outputId,
status: status
)
func makeNetworkError*(): Response {.jsstfunc: "Response.error".} =
#TODO use "create" function
return Response(
res: 0,
responseType: rtError,
status: 0,
headers: newHeaders(hgImmutable),
bodyUsed: true
)
func sok(response: Response): bool {.jsfget: "ok".} =
return response.status in 200u16 .. 299u16
func surl*(response: Response): string {.jsfget: "url".} =
if response.responseType == rtError or response.url == nil:
return ""
return $response.url
#TODO: this should be a property of body
proc close*(response: Response) {.jsfunc.} =
response.bodyUsed = true
if response.unregisterFun != nil:
response.unregisterFun()
if response.body != nil:
response.body.sclose()
func getCharset*(this: Response; fallback: Charset): Charset =
if "Content-Type" notin this.headers.table:
return fallback
let header = this.headers.table["Content-Type"][0].toLowerAscii()
let cs = header.getContentTypeAttr("charset").getCharset()
if cs == CHARSET_UNKNOWN:
return fallback
return cs
func getContentType*(this: Response; fallback = "application/octet-stream"):
string =
this.headers.table.withValue("Content-Type", p):
return p[][0].untilLower(';').strip()
# also use DefaultGuess for container, so that local mime.types cannot
# override buffer mime.types
return DefaultGuess.guessContentType(this.url.pathname, fallback)
type TextOpaque = ref object of RootObj
buf: string
const BufferSize = 4096
proc onReadText(response: Response) =
let opaque = TextOpaque(response.opaque)
while true:
let olen = opaque.buf.len
try:
opaque.buf.setLen(olen + BufferSize)
let n = response.body.recvData(addr opaque.buf[olen], BufferSize)
opaque.buf.setLen(olen + n)
if n == 0:
break
except ErrorAgain:
opaque.buf.setLen(olen)
break
proc resume*(response: Response) =
response.resumeFun(response.outputId)
response.resumeFun = nil
proc text*(response: Response): Promise[JSResult[string]] {.jsfunc.} =
if response.body == nil:
let p = newPromise[JSResult[string]]()
p.resolve(JSResult[string].ok(""))
return p
if response.bodyUsed:
let p = newPromise[JSResult[string]]()
let err = JSResult[string]
.err(newTypeError("Body has already been consumed"))
p.resolve(err)
return p
let opaque = TextOpaque()
response.opaque = opaque
response.onRead = onReadText
response.bodyUsed = true
response.resume()
return response.bodyRead.then(proc(): JSResult[string] =
let charset = response.getCharset(CHARSET_UTF_8)
ok(opaque.buf.decodeAll(charset))
)
type BlobOpaque = ref object of RootObj
p: pointer
len: int
size: int
proc onReadBlob(response: Response) =
let opaque = BlobOpaque(response.opaque)
while true:
try:
let targetLen = opaque.len + BufferSize
if targetLen > opaque.size:
opaque.size = targetLen
opaque.p = realloc(opaque.p, targetLen)
let p = cast[ptr UncheckedArray[uint8]](opaque.p)
let n = response.body.recvData(addr p[opaque.len], BufferSize)
opaque.len += n
if n == 0:
break
except ErrorAgain:
break
proc blob*(response: Response): Promise[JSResult[Blob]] {.jsfunc.} =
if response.bodyUsed:
let p = newPromise[JSResult[Blob]]()
let err = JSResult[Blob].err(newTypeError("Body has already been consumed"))
p.resolve(err)
return p
let opaque = BlobOpaque()
response.opaque = opaque
response.onRead = onReadBlob
response.bodyUsed = true
response.resume()
let contentType = response.getContentType()
return response.bodyRead.then(proc(): JSResult[Blob] =
let p = realloc(opaque.p, opaque.len)
opaque.p = nil
if p == nil:
return ok(newBlob(nil, 0, contentType, nil))
ok(newBlob(p, opaque.len, contentType, deallocBlob))
)
type BitmapOpaque = ref object of RootObj
bmp: Bitmap
idx: int
proc onReadBitmap(response: Response) =
let opaque = BitmapOpaque(response.opaque)
let bmp = opaque.bmp
while true:
try:
let p = cast[ptr UncheckedArray[uint8]](addr bmp.px[0])
let L = bmp.px.len * 4 - opaque.idx
let n = response.body.recvData(addr p[opaque.idx], L)
opaque.idx += n
if n == 0:
break
except ErrorAgain:
break
proc saveToBitmap*(response: Response; bmp: Bitmap): EmptyPromise =
assert not response.bodyUsed
let opaque = BitmapOpaque(bmp: bmp, idx: 0)
let size = bmp.width * bmp.height
bmp.px = cast[seq[RGBAColorBE]](newSeqUninitialized[uint32](size))
response.opaque = opaque
if size > 0:
response.onRead = onReadBitmap
else:
response.unregisterFun()
response.body.sclose()
response.bodyUsed = true
response.resume()
return response.bodyRead
proc json(ctx: JSContext; this: Response): Promise[JSResult[JSValue]]
{.jsfunc.} =
return this.text().then(proc(s: JSResult[string]): JSResult[JSValue] =
let s = ?s
return ok(JS_ParseJSON(ctx, cstring(s), csize_t(s.len), cstring"<input>"))
)
proc addResponseModule*(ctx: JSContext) =
ctx.registerType(Response)
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