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vweb: Implement chunked encoding transfer (#8179)

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Louis Schmieder 2021-01-18 13:04:21 +01:00 committed by GitHub
parent 5ddb70940e
commit 38881e4b20
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4 changed files with 46 additions and 1 deletions

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@ -31,6 +31,7 @@ pub fn (mut app App) index() vweb.Result {
// app.text('Hello world from vweb') // app.text('Hello world from vweb')
hello := 'Hello world from vweb' hello := 'Hello world from vweb'
numbers := [1, 2, 3] numbers := [1, 2, 3]
app.enable_chunked_transfer(40)
return $vweb.html() return $vweb.html()
} }

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@ -106,6 +106,13 @@ fn test_http_client_index() {
assert x.text == 'Welcome to VWeb' assert x.text == 'Welcome to VWeb'
} }
fn test_http_client_chunk_transfer() {
x := http.get('http://127.0.0.1:$sport/chunk') or { panic(err) }
assert_common_http_headers(x)
assert x.headers['Transfer-Encoding'] == 'chunked'
assert x.text == 'Lorem ipsum dolor sit amet, consetetur sadipscing'
}
fn test_http_client_404() { fn test_http_client_404() {
url_404_list := [ url_404_list := [
'http://127.0.0.1:$sport/zxcnbnm', 'http://127.0.0.1:$sport/zxcnbnm',

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@ -56,6 +56,11 @@ pub fn (mut app App) html_page() vweb.Result {
return app.html('<h1>ok</h1>') return app.html('<h1>ok</h1>')
} }
pub fn (mut app App) chunk() vweb.Result {
app.enable_chunked_transfer(20)
return app.html('Lorem ipsum dolor sit amet, consetetur sadipscing')
}
// the following serve custom routes // the following serve custom routes
['/:user/settings'] ['/:user/settings']
pub fn (mut app App) settings(username string) vweb.Result { pub fn (mut app App) settings(username string) vweb.Result {

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@ -56,6 +56,8 @@ pub mut:
done bool done bool
page_gen_start i64 page_gen_start i64
form_error string form_error string
chunked_transfer bool
max_chunk_len int = 20
} }
// declaring init_once in your App struct is optional // declaring init_once in your App struct is optional
@ -88,10 +90,35 @@ pub fn (mut ctx Context) send_response_to_client(mimetype string, res string) bo
sb.write('HTTP/1.1 $ctx.status') sb.write('HTTP/1.1 $ctx.status')
sb.write('\r\nContent-Type: $mimetype') sb.write('\r\nContent-Type: $mimetype')
sb.write('\r\nContent-Length: $res.len') sb.write('\r\nContent-Length: $res.len')
if ctx.chunked_transfer {
sb.write('\r\nTransfer-Encoding: chunked')
}
sb.write(ctx.headers) sb.write(ctx.headers)
sb.write('\r\n') sb.write('\r\n')
sb.write(headers_close) sb.write(headers_close)
sb.write(res) if ctx.chunked_transfer {
mut i := 0
mut len := res.len
for {
if len <= 0 {
break
}
mut chunk := ''
if len > ctx.max_chunk_len {
chunk = res[i..i + ctx.max_chunk_len]
i += ctx.max_chunk_len
len -= ctx.max_chunk_len
} else {
chunk = res[i..]
len = 0
}
sb.write(chunk.len.hex())
sb.write('\r\n$chunk\r\n')
}
sb.write('0\r\n\r\n') // End of chunks
} else {
sb.write(res)
}
s := sb.str() s := sb.str()
defer { defer {
s.free() s.free()
@ -140,6 +167,11 @@ pub fn (mut ctx Context) not_found() Result {
return Result{} return Result{}
} }
pub fn (mut ctx Context) enable_chunked_transfer(max_chunk_len int) {
ctx.chunked_transfer = true
ctx.max_chunk_len = max_chunk_len
}
pub fn (mut ctx Context) set_cookie(cookie Cookie) { pub fn (mut ctx Context) set_cookie(cookie Cookie) {
mut cookie_data := []string{} mut cookie_data := []string{}
mut secure := if cookie.secure { 'Secure;' } else { '' } mut secure := if cookie.secure { 'Secure;' } else { '' }