1 use std
::convert
::From
;
5 use std
::borrow
::BorrowMut
;
6 use std
::sync
::{Arc
, Mutex
};
8 use num_traits
::cast
::AsPrimitive
;
9 use percent_encoding
::percent_decode_str
;
10 use actix_web
::{get
, web
, App
, HttpServer
, HttpRequest
, HttpResponse
, Responder
, ResponseError
, Result
};
11 use actix_web
::body
::BoxBody
;
12 use actix_web
::http
::StatusCode
;
13 use image
::{ImageBuffer
, ColorType
, Rgb
, RgbImage
, write_buffer_with_format
};
14 use image
::ImageOutputFormat
::Png
;
15 use image
::imageops
::{FilterType
, overlay
, resize
};
16 use image
::error
::{LimitError
, LimitErrorKind
};
17 use actix_web
::cookie
::time
::OffsetDateTime
;
20 const TIMEAVATAR_SIZE_U32
: u32 = 6;
21 const TIMEAVATAR_SIZE_I64
: i64 = TIMEAVATAR_SIZE_U32
as i64;
24 struct ImageError(image
::ImageError
);
27 fn dimension_error() -> ImageError
{
28 ImageError(image
::ImageError
::Limits(LimitError
::from_kind(LimitErrorKind
::DimensionError
)))
32 impl Display
for ImageError
{
33 fn fmt(&self, f
: &mut fmt
::Formatter
<'_
>) -> fmt
::Result
{
34 write
!(f
, "{}", &self.0)
38 impl ResponseError
for ImageError
{
39 fn status_code(&self) -> StatusCode
{
40 StatusCode
::INTERNAL_SERVER_ERROR
43 fn error_response(&self) -> HttpResponse
<BoxBody
> {
44 HttpResponse
::InternalServerError().body(format
!("{}\n", &self))
51 DimensionMismatch((u32, u32)),
52 ImageError(ImageError
)
55 impl Display
for CanvasError
{
56 fn fmt(&self, f
: &mut fmt
::Formatter
<'_
>) -> fmt
::Result
{
57 write
!(f
, "Canvas Error: see error_response() for more details")
61 impl ResponseError
for CanvasError
{
62 fn status_code(&self) -> StatusCode
{
64 CanvasError
::NotExists
=> StatusCode
::NOT_FOUND
,
65 CanvasError
::DimensionMismatch(_
) => StatusCode
::BAD_REQUEST
,
66 CanvasError
::ImageError(e
) => e
.status_code()
70 fn error_response(&self) -> HttpResponse
<BoxBody
> {
72 CanvasError
::NotExists
=> HttpResponse
::NotFound().body("Canvas does not exist."),
73 CanvasError
::DimensionMismatch(dim
) =>
74 HttpResponse
::BadRequest().body(format
!("Supplied dimensions don't match the dimensions of existing canvas {:?}.", dim
)),
75 CanvasError
::ImageError(e
) => e
.error_response()
80 impl From
<ImageError
> for CanvasError
{
81 fn from(e
: ImageError
) -> CanvasError
{
82 CanvasError
::ImageError(e
)
86 struct ToRgbIter
<'a
, T
> where T
: AsPrimitive
<u8> {
87 iter
: &'a
mut dyn Iterator
<Item
= T
>
90 impl<'a
, T
: AsPrimitive
<u8>> ToRgbIter
<'a
, T
> {
91 fn new(iter
: &'a
mut (dyn Iterator
<Item
= T
>)) -> ToRgbIter
<T
> {
96 impl<T
: AsPrimitive
<u8> + Zero
> Iterator
for ToRgbIter
<'_
, T
> {
98 fn next(&mut self) -> Option
<Rgb
<u8>> {
99 if let Some(r
) = self.iter
.next() {
100 let g
= self.iter
.next().unwrap
_or
_else
(T
::zero
);
101 let b
= self.iter
.next().unwrap
_or
_else
(T
::zero
);
102 Some(Rgb([r
.as_(), g
.as_(), b
.as_()]))
110 fn to_imageresult
<T
> (result
: Result
<T
, image
::ImageError
>) -> Result
<T
, ImageError
> {
113 Err(e
) => Err(ImageError(e
))
117 fn to_canvasresult
<T
: std
::fmt
::Debug
> (result
: Result
<T
, ImageError
>) -> Result
<T
, CanvasError
> {
120 Err(e
) => Err(CanvasError
::ImageError(e
))
131 fn new(width
: u32, height
: u32) -> Canvas
{
132 Canvas
{ pen
: 0, img
: ImageBuffer
::new(width
, height
) }
135 fn from_image(img
: RgbImage
) -> Canvas
{
136 Canvas
{ pen
: 0, img
}
139 /*fn replace(&self, img: RgbImage, pen: usize) -> Canvas {
145 fn advance_pen(mut self, offset
: usize) -> Canvas
{
146 //Canvas { pen: self.pen + offset, img: self.img }
148 self.pen
%= self.img
.width() as usize * self.img
.height() as usize;
153 struct Canvas0(Option
<Canvas
>);
154 struct Canvas1(Option
<Canvas
>);
155 struct Canvas2(Option
<Canvas
>);
157 #[get("/hello/{name}")]
158 async
fn greet(name
: web
::Path
<String
>, req
: HttpRequest
) -> impl Responder
{
159 println
!("{:?}", req
);
160 format
!("Hello {name}!\n{:?}", req
.headers().get("user-agent"))
163 fn rgb_encode_to_canvas(mut canvas
: Canvas
, data
: &mut dyn Iterator
<Item
= u8>) -> Result
<Canvas
, ImageError
> {
164 let mut pixels
= canvas
.img
.pixels_mut().skip(canvas
.pen
);
167 for sp
in ToRgbIter
::new(data
) {
168 let mut dp
= match pixels
.next() {
169 Some(pixel
) => pixel
,
171 pixels
= canvas
.img
.pixels_mut().skip(0);
172 pixels
.next().ok_or_else(ImageError
::dimension_error
)?
179 Ok(canvas
.advance_pen(counter
))
182 fn rgb_encode(img
: RgbImage
, data
: &mut dyn Iterator
<Item
= u8>) -> Result
<RgbImage
, ImageError
> {
183 Ok(rgb_encode_to_canvas(Canvas
::from_image(img
), data
)?
.img
)
186 fn apply_to_canvas
<'a
, F
>(f
: F
, canvas_option
: &'a
mut Option
<Canvas
>, dimensions
: Option
<(u32, u32)>, data
: &str) -> Result
<&'a
mut Canvas
, CanvasError
>
187 where F
: Fn(Canvas
, &mut dyn Iterator
<Item
= u8>) -> Result
<Canvas
, CanvasError
>
189 let canvas
= match canvas_option
.take() {
190 Some(canvas
) => match dimensions
{
191 Some(dimensions
) => {
192 if dimensions
== canvas
.img
.dimensions() {
196 Err(CanvasError
::DimensionMismatch(canvas_option
.insert
(canvas
).img
.dimensions()))
202 None
=> match dimensions
{
203 Some((dim_x
, dim_y
)) =>
204 Ok(Canvas
::new(dim_x
, dim_y
)),
206 Err(CanvasError
::NotExists
)
210 Ok(canvas_option
.insert
(f(canvas
, percent_decode_str(data
).into
_iter
().borrow_mut())?
))
213 fn make_png(dim_x
: u32, dim_y
: u32, scale
: u32, data
: &mut dyn Iterator
<Item
= u8>) -> Result
<Cursor
<Vec
<u8>>, ImageError
> {
214 // Image must not be larger than 1 megapixel
215 if dim_x
* dim_y
* scale
> 1048576 {
216 return Err(ImageError
::dimension_error())
219 let img
: RgbImage
= rgb_encode(ImageBuffer
::new(dim_x
, dim_y
), data
)?
;
220 let cursor
= image_to_cursor(img
, scale
)?
;
224 fn image_to_cursor(img
: RgbImage
, scale
: u32) -> Result
<Cursor
<Vec
<u8>>, ImageError
> {
225 let (dim_x
, dim_y
) = img
.dimensions();
226 let (dim_x
, dim_y
) = (dim_x
* scale
, dim_y
* scale
);
228 // Image must not be larger than 1 megapixel
229 if dim_x
* dim_y
> 1048576 {
230 return Err(ImageError
::dimension_error())
233 let mut cursor
= Cursor
::new(Vec
::new());
234 let img
= resize(&img
, dim_x
, dim_y
, FilterType
::Nearest
);
235 to_imageresult(write_buffer_with_format(&mut cursor
, &img
, dim_x
, dim_y
, ColorType
::Rgb8
, Png
))?
;
240 #[get("/gen/0/{data}")]
241 async
fn img_gen0(req
: HttpRequest
) -> Result
<impl Responder
> {
242 let data
= req
.ur
i().path().split('
/'
).nth(3).unwrap
();
243 let cursor
= make_png(32, 32, 16, percent_decode_str(data
).into
_iter
().borrow_mut())?
;
244 Ok(HttpResponse
::build(StatusCode
::OK
)
245 .content_type("image/png")
246 .body(cursor
.into
_inner
()))
249 #[get("/gen/1/{dim_x}/{dim_y}/{scale}/{data}")]
250 async
fn img_gen1(req
: HttpRequest
, path
: web
::Path
<(u32, u32, u32)>) -> Result
<impl Responder
> {
251 let (dim_x
, dim_y
, scale
) = path
.into
_inner
();
252 let data
= req
.ur
i().path().split('
/'
).nth(6).unwrap
();
253 let cursor
= make_png(dim_x
, dim_y
, scale
, percent_decode_str(data
).into
_iter
().borrow_mut())?
;
254 Ok(HttpResponse
::build(StatusCode
::OK
)
255 .content_type("image/png")
256 .body(cursor
.into
_inner
()))
259 #[get("/gen/2/{dim_x}/{dim_y}/{scale}")]
260 async
fn img_gen2(req
: HttpRequest
, path
: web
::Path
<(u32, u32, u32)>) -> Result
<impl Responder
> {
261 let (dim_x
, dim_y
, scale
) = path
.into
_inner
();
262 let data
= match req
.headers().get("user-agent") {
263 Some(header
) => header
.to_str().unwrap
_or
(""),
266 let cursor
= make_png(dim_x
, dim_y
, scale
, &mut data
.bytes())?
;
267 Ok(HttpResponse
::build(StatusCode
::OK
)
268 .content_type("image/png")
269 .body(cursor
.into
_inner
()))
272 #[get("/gen/3/{scale}")]
273 async
fn img_gen3(req
: HttpRequest
, path
: web
::Path
<u32>) -> Result
<impl Responder
> {
274 let scale
= path
.into
_inner
();
275 let data
= match req
.headers().get("user-agent") {
276 Some(header
) => header
.to_str().unwrap
_or
(""),
279 let rgbimg
: RgbImage
= rgb_encode(ImageBuffer
::new(TIMEAVATAR_SIZE_U32
, TIMEAVATAR_SIZE_U32
), &mut data
.bytes())?
;
280 let mut resimg
: RgbImage
= ImageBuffer
::new(60 * TIMEAVATAR_SIZE_U32
, 24 * TIMEAVATAR_SIZE_U32
);
281 let time
= OffsetDateTime
::now_utc().time();
282 let (hour
, minute
): (i64, i64) = (time
.hour().into
(), time
.minute().into
());
283 overlay(&mut resimg
, &rgbimg
, minute
* TIMEAVATAR_SIZE_I64
, hour
* TIMEAVATAR_SIZE_I64
);
284 let cursor
= image_to_cursor(resimg
, scale
)?
;
285 Ok(HttpResponse
::build(StatusCode
::OK
)
286 .content_type("image/png")
287 .body(cursor
.into
_inner
()))
290 #[get("/pgen/0/{data}")]
291 async
fn img_pgen0(req
: HttpRequest
, canvas0
: web
::Data
<Arc
<Mutex
<Canvas0
>>>) -> Result
<impl Responder
> {
292 let data
= req
.ur
i().path().split('
/'
).nth(3).unwrap
();
294 let img
: RgbImage
= ({
295 let canvas_option
= &mut *canvas0
.lock().unwrap
();
296 Ok(apply_to_canvas( |c
, d
| to_canvasresult(rgb_encode_to_canvas(c
, d
)), &mut canvas_option
.0, None
, data
)?
.img
.clone())
297 } as Result
<RgbImage
, CanvasError
>)?
;
298 let cursor
= image_to_cursor(img
, scale
)?
;
299 Ok(HttpResponse
::build(StatusCode
::OK
)
300 .content_type("image/png")
301 .body(cursor
.into
_inner
()))
304 #[get("/pgen/1/{dim_x}/{dim_y}/{scale}/{data}")]
305 async
fn img_pgen1(req
: HttpRequest
, path
: web
::Path
<(u32, u32, u32)>, canvas1
: web
::Data
<Arc
<Mutex
<Canvas1
>>>) -> Result
<impl Responder
> {
306 let (dim_x
, dim_y
, scale
) = path
.into
_inner
();
307 let data
= req
.ur
i().path().split('
/'
).nth(6).unwrap
();
308 let img
: RgbImage
= ({
309 let canvas_option
= &mut *canvas1
.lock().unwrap
();
310 Ok(apply_to_canvas( |c
, d
| to_canvasresult(rgb_encode_to_canvas(c
, d
)), &mut canvas_option
.0, Some((dim_x
, dim_y
)), data
)?
.img
.clone())
311 } as Result
<RgbImage
, CanvasError
>)?
;
312 let cursor
= image_to_cursor(img
, scale
)?
;
313 Ok(HttpResponse
::build(StatusCode
::OK
)
314 .content_type("image/png")
315 .body(cursor
.into
_inner
()))
318 #[get("/pgen/2/{dim_x}/{dim_y}/{scale}")]
319 async
fn img_pgen2(req
: HttpRequest
, path
: web
::Path
<(u32, u32, u32)>, canvas1
: web
::Data
<Arc
<Mutex
<Canvas1
>>>) -> Result
<impl Responder
> {
320 let (dim_x
, dim_y
, scale
) = path
.into
_inner
();
321 let data
= match req
.headers().get("user-agent") {
322 Some(header
) => header
.to_str().unwrap
_or
(""),
325 let img
: RgbImage
= ({
326 let canvas_option
= &mut *canvas1
.lock().unwrap
();
327 Ok(apply_to_canvas( |c
, d
| to_canvasresult(rgb_encode_to_canvas(c
, d
)), &mut canvas_option
.0, Some((dim_x
, dim_y
)), data
)?
.img
.clone())
328 } as Result
<RgbImage
, CanvasError
>)?
;
329 let cursor
= image_to_cursor(img
, scale
)?
;
330 Ok(HttpResponse
::build(StatusCode
::OK
)
331 .content_type("image/png")
332 .body(cursor
.into
_inner
()))
335 #[get("/pgen/3/{scale}")]
336 async
fn img_pgen3(req
: HttpRequest
, path
: web
::Path
<u32>, canvas2
: web
::Data
<Arc
<Mutex
<Canvas2
>>>) -> Result
<impl Responder
> {
337 let scale
= path
.into
_inner
();
338 let data
= match req
.headers().get("user-agent") {
339 Some(header
) => header
.to_str().unwrap
_or
(""),
342 let time
= OffsetDateTime
::now_utc().time();
343 let (hour
, minute
): (i64, i64) = (time
.hour().into
(), time
.minute().into
());
344 let rgbimg
: RgbImage
= rgb_encode(ImageBuffer
::new(TIMEAVATAR_SIZE_U32
, TIMEAVATAR_SIZE_U32
), &mut data
.bytes())?
;
345 let resimg
: RgbImage
= ({
346 let canvas_option
= &mut *canvas2
.lock().unwrap
();
347 let mut canvas
= match canvas_option
.0.take() {
348 Some(canvas
) => canvas
,
349 None
=> Canvas
::new(60 * TIMEAVATAR_SIZE_U32
, 24 * TIMEAVATAR_SIZE_U32
)
351 overlay(&mut canvas
.img
, &rgbimg
, minute
* TIMEAVATAR_SIZE_I64
, hour
* TIMEAVATAR_SIZE_I64
);
352 Ok(canvas_option
.0.insert
(canvas
).img
.clone())
353 } as Result
<RgbImage
, CanvasError
>)?
;
354 let cursor
= image_to_cursor(resimg
, scale
)?
;
355 Ok(HttpResponse
::build(StatusCode
::OK
)
356 .content_type("image/png")
357 .body(cursor
.into
_inner
()))
360 #[get("/pdrop/{canvas_id}")]
361 async
fn pdrop(canvas_id
: web
::Path
<u8>,
362 canvas0
: web
::Data
<Arc
<Mutex
<Canvas0
>>>,
363 canvas1
: web
::Data
<Arc
<Mutex
<Canvas1
>>>,
364 canvas2
: web
::Data
<Arc
<Mutex
<Canvas2
>>>) -> Result
<impl Responder
> {
366 let canvas_id
= canvas_id
.into
_inner
();
368 0 => canvas0
.lock().unwrap
().0.take(),
369 1 => canvas1
.lock().unwrap
().0.take(),
370 2 => canvas2
.lock().unwrap
().0.take(),
372 }.ok_or(CanvasError
::NotExists
)?
;
373 Ok(HttpResponse
::build(StatusCode
::OK
)
374 .body(format
!("Canvas {} dropped.", canvas_id
)))
378 #[actix_web::main] // or #[tokio::main]
379 async
fn main() -> std
::io
::Result
<()> {
381 let canvas0
= Arc
::new(Mutex
::new(Canvas0(Some(Canvas
::new(32, 32)))));
382 let canvas1
= Arc
::new(Mutex
::new(Canvas1(None
)));
383 let canvas2
= Arc
::new(Mutex
::new(Canvas2(None
)));
384 HttpServer
::new(move || {
396 .app_data(web
::Data
::new(canvas0
.clone()))
397 .app_data(web
::Data
::new(canvas1
.clone()))
398 .app_data(web
::Data
::new(canvas2
.clone()))
400 .bind(("127.0.0.1", 8080))?