move tileset to separate file

This commit is contained in:
Stepan Kuzmin 2018-01-18 13:42:06 +03:00
parent e37a46b785
commit 0b111532ad
9 changed files with 366 additions and 213 deletions

View File

@ -1,6 +1,21 @@
language: rust language: rust
cache: cargo cache: cargo
branches:
except:
- /^v[0-9]/
services:
- postgresql
env:
- DATABASE_URL=postgres://postgres@localhost/test
before_script:
- psql -U postgres -c 'create database test'
- psql -U postgres -d test -c 'create extension postgis'
- psql -U postgres -d test -f fixtures/tilebbox.sql
- psql -U postgres -d test -f fixtures/points.sql
script: script:
- cargo build --verbose --all
- cargo test --verbose --all - cargo test --verbose --all

267
Cargo.lock generated
View File

@ -1,9 +1,9 @@
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@ -41,18 +41,23 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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@ -87,24 +92,22 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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@ -132,7 +135,7 @@ dependencies = [
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"checksum nodrop 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)" = "9a2228dca57108069a5262f2ed8bd2e82496d2e074a06d1ccc7ce1687b6ae0a2" "checksum nodrop 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)" = "9a2228dca57108069a5262f2ed8bd2e82496d2e074a06d1ccc7ce1687b6ae0a2"
"checksum num-traits 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)" = "99843c856d68d8b4313b03a17e33c4bb42ae8f6610ea81b28abe076ac721b9b0" "checksum num-traits 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)" = "cacfcab5eb48250ee7d0c7896b51a2c5eec99c1feea5f32025635f5ae4b00070"
"checksum num_cpus 1.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "514f0d73e64be53ff320680ca671b64fe3fb91da01e1ae2ddc99eb51d453b20d" "checksum num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c51a3322e4bca9d212ad9a158a02abc6934d005490c054a2778df73a70aa0a30"
"checksum percent-encoding 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "31010dd2e1ac33d5b46a5b413495239882813e0369f8ed8a5e266f173602f831" "checksum percent-encoding 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "31010dd2e1ac33d5b46a5b413495239882813e0369f8ed8a5e266f173602f831"
"checksum persistent 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8e8fa0009c4f3d350281309909c618abddf10bb7e3145f28410782f6a5ec74c5" "checksum persistent 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8e8fa0009c4f3d350281309909c618abddf10bb7e3145f28410782f6a5ec74c5"
"checksum phf 0.7.21 (registry+https://github.com/rust-lang/crates.io-index)" = "cb325642290f28ee14d8c6201159949a872f220c62af6e110a56ea914fbe42fc" "checksum phf 0.7.21 (registry+https://github.com/rust-lang/crates.io-index)" = "cb325642290f28ee14d8c6201159949a872f220c62af6e110a56ea914fbe42fc"
@ -744,25 +795,25 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
"checksum quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e920b65c65f10b2ae65c831a81a073a89edd28c7cce89475bff467ab4167a" "checksum quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e920b65c65f10b2ae65c831a81a073a89edd28c7cce89475bff467ab4167a"
"checksum r2d2 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)" = "2c8284508b38df440f8f3527395e23c4780b22f74226b270daf58fee38e4bcce" "checksum r2d2 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)" = "2c8284508b38df440f8f3527395e23c4780b22f74226b270daf58fee38e4bcce"
"checksum r2d2_postgres 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1f8b19a6ea63676566dd11085217fed98866ca833cea7f6f29be8c2244e0560e" "checksum r2d2_postgres 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1f8b19a6ea63676566dd11085217fed98866ca833cea7f6f29be8c2244e0560e"
"checksum rand 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)" = "6475140dfd8655aeb72e1fd4b7a1cc1c202be65d71669476e392fe62532b9edd" "checksum rand 0.3.20 (registry+https://github.com/rust-lang/crates.io-index)" = "512870020642bb8c221bf68baa1b2573da814f6ccfe5c9699b1c303047abe9b1"
"checksum redox_syscall 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)" = "8dde11f18c108289bef24469638a04dce49da56084f2d50618b226e47eb04509" "checksum redox_syscall 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)" = "0d92eecebad22b767915e4d529f89f28ee96dbbf5a4810d2b844373f136417fd"
"checksum regex 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1731164734096285ec2a5ec7fea5248ae2f5485b3feeb0115af4fda2183b2d1b" "checksum regex 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "744554e01ccbd98fff8c457c3b092cd67af62a555a43bfe97ae8a0451f7799fa"
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"checksum scheduled-thread-pool 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2d9fbe48ead32343b76f544c85953bf260ed39219a8bbbb62cd85f6a00f9644f" "checksum scheduled-thread-pool 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2d9fbe48ead32343b76f544c85953bf260ed39219a8bbbb62cd85f6a00f9644f"
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"checksum serde_derive_internals 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)" = "32f1926285523b2db55df263d2aa4eb69ddcfa7a7eade6430323637866b513ab" "checksum serde_derive_internals 0.19.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6e03f1c9530c3fb0a0a5c9b826bdd9246a5921ae995d75f512ac917fc4dd55b5"
"checksum serde_json 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "e4586746d1974a030c48919731ecffd0ed28d0c40749d0d18d43b3a7d6c9b20e" "checksum serde_json 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)" = "c9db7266c7d63a4c4b7fe8719656ccdd51acf1bed6124b174f933b009fb10bcb"
"checksum sha2 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7d963c78ce367df26d7ea8b8cc655c651b42e8a1e584e869c1e17dae3ccb116a" "checksum sha2 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7d963c78ce367df26d7ea8b8cc655c651b42e8a1e584e869c1e17dae3ccb116a"
"checksum siphasher 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "0df90a788073e8d0235a67e50441d47db7c8ad9debd91cbf43736a2a92d36537" "checksum siphasher 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "0df90a788073e8d0235a67e50441d47db7c8ad9debd91cbf43736a2a92d36537"
"checksum stringprep 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "8ee348cb74b87454fff4b551cbf727025810a004f88aeacae7f85b87f4e9a1c1" "checksum stringprep 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "8ee348cb74b87454fff4b551cbf727025810a004f88aeacae7f85b87f4e9a1c1"
"checksum syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)" = "d3b891b9015c88c576343b9b3e41c2c11a51c219ef067b264bd9c8aa9b441dad" "checksum syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)" = "d3b891b9015c88c576343b9b3e41c2c11a51c219ef067b264bd9c8aa9b441dad"
"checksum synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a393066ed9010ebaed60b9eafa373d4b1baac186dd7e008555b0f702b51945b6" "checksum synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a393066ed9010ebaed60b9eafa373d4b1baac186dd7e008555b0f702b51945b6"
"checksum thread_local 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "1697c4b57aeeb7a536b647165a2825faddffb1d3bad386d507709bd51a90bb14" "checksum thread_local 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "279ef31c19ededf577bfd12dfae728040a21f635b06a24cd670ff510edd38963"
"checksum tilejson 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2117abf55755175b050f820472ddcd7762d7c60764af8bdfa828734276841847" "checksum tilejson 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2117abf55755175b050f820472ddcd7762d7c60764af8bdfa828734276841847"
"checksum time 0.1.38 (registry+https://github.com/rust-lang/crates.io-index)" = "d5d788d3aa77bc0ef3e9621256885555368b47bd495c13dd2e7413c89f845520" "checksum time 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)" = "a15375f1df02096fb3317256ce2cee6a1f42fc84ea5ad5fc8c421cfe40c73098"
"checksum traitobject 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "efd1f82c56340fdf16f2a953d7bda4f8fdffba13d93b00844c25572110b26079" "checksum traitobject 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "efd1f82c56340fdf16f2a953d7bda4f8fdffba13d93b00844c25572110b26079"
"checksum typeable 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1410f6f91f21d1612654e7cc69193b0334f909dcf2c790c4826254fbb86f8887" "checksum typeable 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1410f6f91f21d1612654e7cc69193b0334f909dcf2c790c4826254fbb86f8887"
"checksum typemap 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "653be63c80a3296da5551e1bfd2cca35227e13cdd08c6668903ae2f4f77aa1f6" "checksum typemap 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "653be63c80a3296da5551e1bfd2cca35227e13cdd08c6668903ae2f4f77aa1f6"
@ -779,4 +830,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
"checksum version_check 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6b772017e347561807c1aa192438c5fd74242a670a6cffacc40f2defd1dc069d" "checksum version_check 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6b772017e347561807c1aa192438c5fd74242a670a6cffacc40f2defd1dc069d"
"checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d" "checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
"checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a" "checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
"checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc" "checksum winapi 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "b09fb3b6f248ea4cd42c9a65113a847d612e17505d6ebd1f7357ad68a8bf8693"
"checksum winapi-i686-pc-windows-gnu 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "ec6667f60c23eca65c561e63a13d81b44234c2e38a6b6c959025ee907ec614cc"
"checksum winapi-x86_64-pc-windows-gnu 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "98f12c52b2630cd05d2c3ffd8e008f7f48252c042b4871c72aed9dc733b96668"

View File

@ -10,6 +10,7 @@ path = "src/main.rs"
[dependencies] [dependencies]
regex = "0.2.2" regex = "0.2.2"
iron = "0.6.0" iron = "0.6.0"
iron-test = "0.6.0"
rererouter = "0.1.1" rererouter = "0.1.1"
persistent = "0.4.0" persistent = "0.4.0"
lazy_static = "0.2.11" lazy_static = "0.2.11"

6
fixtures/points.sql Normal file
View File

@ -0,0 +1,6 @@
create table points(gid serial PRIMARY KEY, geom geometry(GEOMETRY, 4326));
INSERT INTO points
SELECT
generate_series(1, 1000) as id,
(ST_Dump(ST_GeneratePoints(ST_GeomFromText('POLYGON ((-180 90, 180 90, 180 -90, -180 -90, -180 90))', 4326), 1000))).geom;

37
fixtures/tilebbox.sql Normal file
View File

@ -0,0 +1,37 @@
/* https://github.com/mapbox/postgis-vt-util/blob/master/postgis-vt-util.sql */
/******************************************************************************
### TileBBox ###
Given a Web Mercator tile ID as (z, x, y), returns a bounding-box
geometry of the area covered by that tile.
__Parameters:__
- `integer` z - A tile zoom level.
- `integer` x - A tile x-position.
- `integer` y - A tile y-position.
- `integer` srid - SRID of the desired target projection of the bounding
box. Defaults to 3857 (Web Mercator).
__Returns:__ `geometry(polygon)`
******************************************************************************/
create or replace function TileBBox (z int, x int, y int, srid int = 3857)
returns geometry
language plpgsql immutable as
$func$
declare
max numeric := 20037508.34;
res numeric := (max*2)/(2^z);
bbox geometry;
begin
bbox := ST_MakeEnvelope(
-max + (x * res),
max - (y * res),
-max + (x * res) + res,
max - (y * res) - res,
3857
);
if srid = 3857 then
return bbox;
else
return ST_Transform(bbox, srid);
end if;
end;
$func$;

View File

@ -1,5 +1,4 @@
use std::error::Error; use std::error::Error;
use std::collections::HashMap;
use iron::typemap::Key; use iron::typemap::Key;
use iron::prelude::{Plugin, Request}; use iron::prelude::{Plugin, Request};
@ -25,90 +24,3 @@ pub fn get_connection(req: &mut Request) -> Result<PostgresConnection, Box<Error
let conn = try!(pool.get()); let conn = try!(pool.get());
Ok(conn) Ok(conn)
} }
pub fn get_tile(conn: PostgresConnection, tileset: &Tileset, z: &i32, x: &i32, y: &i32) -> Result<Vec<u8>, Box<Error>> {
let rows = try!(conn.query(&tileset.query, &[&z, &x, &y]));
let tile = rows.get(0).get("st_asmvt");
Ok(tile)
}
#[derive(Serialize, Debug)]
pub struct Tileset {
schema: String,
table: String,
geometry_column: String,
srid: i32,
extent: i32,
buffer: i32,
clip_geom: bool,
geometry_type: String,
query: String
}
pub struct Tilesets;
impl Key for Tilesets { type Value = HashMap<String, Tileset>; }
pub fn get_tilesets(conn: PostgresConnection) -> Result<HashMap<String, Tileset>, Box<Error>> {
let query = "
select
f_table_schema, f_table_name, f_geometry_column, srid, type
from geometry_columns
";
let default_extent = 4096;
let default_buffer = 0; // 256
let default_clip_geom = true;
let mut tilesets = HashMap::new();
let rows = try!(conn.query(&query, &[]));
for row in &rows {
let schema: String = row.get("f_table_schema");
let table: String = row.get("f_table_name");
let id = format!("{}.{}", schema, table);
let geometry_column: String = row.get("f_geometry_column");
let srid: i32 = row.get("srid");
let transformed_geometry = if srid == 3857 {
geometry_column.clone()
} else {
format!("ST_Transform({0}, 3857)", geometry_column)
};
let query = format!(
"SELECT ST_AsMVT(q, '{1}', {4}, '{2}') FROM (\
SELECT ST_AsMVTGeom(\
{3}, \
TileBBox($1, $2, $3, 3857), \
{4}, \
{5}, \
{6}\
) AS geom FROM {0}.{1}\
) AS q;",
schema,
table,
geometry_column,
transformed_geometry,
default_extent,
default_buffer,
default_clip_geom
);
let tileset = Tileset {
schema: schema,
table: table,
geometry_column: geometry_column,
srid: srid,
extent: default_extent,
buffer: default_buffer,
clip_geom: default_clip_geom,
geometry_type: row.get("type"),
query: query
};
tilesets.insert(id, tileset);
}
Ok(tilesets)
}

View File

@ -1,10 +1,11 @@
extern crate iron; extern crate iron;
extern crate regex; extern crate regex;
extern crate iron_test;
extern crate persistent; extern crate persistent;
extern crate tilejson;
extern crate rererouter; extern crate rererouter;
extern crate r2d2; extern crate r2d2;
extern crate r2d2_postgres; extern crate r2d2_postgres;
// #[macro_use] extern crate lazy_static;
#[macro_use] #[macro_use]
extern crate serde_derive; extern crate serde_derive;
@ -12,8 +13,6 @@ extern crate serde_derive;
extern crate serde; extern crate serde;
extern crate serde_json; extern crate serde_json;
extern crate tilejson;
use std::env; use std::env;
use persistent::Read; use persistent::Read;
use rererouter::RouterBuilder; use rererouter::RouterBuilder;
@ -22,11 +21,9 @@ use iron::prelude::{Iron, Chain};
mod db; mod db;
mod cors; mod cors;
mod routes; mod routes;
mod tileset;
fn main() { pub fn app(conn_string: String) -> iron::Chain {
let conn_string: String = env::var("DATABASE_URL")
.expect("DATABASE_URL must be set");
let mut router_builder = RouterBuilder::new(); let mut router_builder = RouterBuilder::new();
router_builder.get(r"/index.json", routes::index); router_builder.get(r"/index.json", routes::index);
router_builder.get(r"/(?P<tileset>[\w|\.]*)\.json", routes::tileset); router_builder.get(r"/(?P<tileset>[\w|\.]*)\.json", routes::tileset);
@ -39,8 +36,8 @@ fn main() {
match db::setup_connection_pool(&conn_string, 10) { match db::setup_connection_pool(&conn_string, 10) {
Ok(pool) => { Ok(pool) => {
let conn = pool.get().unwrap(); let conn = pool.get().unwrap();
let tilesets = db::get_tilesets(conn).unwrap(); let tilesets = tileset::get_tilesets(conn).unwrap();
chain.link(Read::<db::Tilesets>::both(tilesets)); chain.link(Read::<tileset::Tilesets>::both(tilesets));
chain.link(Read::<db::DB>::both(pool)); chain.link(Read::<db::DB>::both(pool));
}, },
@ -52,8 +49,40 @@ fn main() {
chain.link_after(cors::Middleware); chain.link_after(cors::Middleware);
chain
}
fn main() {
let conn_string: String = env::var("DATABASE_URL")
.expect("DATABASE_URL must be set");
let chain = app(conn_string);
let port = 3000; let port = 3000;
let bind_addr = format!("0.0.0.0:{}", port); let bind_addr = format!("0.0.0.0:{}", port);
println!("Server has been started on {}.", bind_addr); println!("Server has been started on {}.", bind_addr);
Iron::new(chain).http(bind_addr.as_str()).unwrap(); Iron::new(chain).http(bind_addr.as_str()).unwrap();
} }
#[cfg(test)]
mod tests {
use std::env;
use iron::Headers;
use iron_test::{request, response};
use super::app;
#[test]
fn test_index() {
let conn_string: String = env::var("DATABASE_URL")
.expect("DATABASE_URL must be set");
let chain = app(conn_string);
let headers = Headers::new();
let response = request::get("http://localhost:3000/index.json", headers, &chain).unwrap();
let result_body = response::extract_body_to_bytes(response);
assert_eq!(result_body, b"{}");
}
}

View File

@ -5,26 +5,34 @@ use persistent::Read;
use serde_json; use serde_json;
use super::db; use super::db;
use super::tileset;
use tilejson::TileJSONBuilder; use tilejson::TileJSONBuilder;
pub fn index(_req: &mut Request, _caps: Captures) -> IronResult<Response> { pub fn index(_req: &mut Request, _caps: Captures) -> IronResult<Response> {
println!("index.json"); // let tilesets = req.get::<Read<db::Tilesets>>().unwrap();
// let serialized_tilesets = serde_json::to_string(&tilesets).unwrap();
// Ok(Response::with((status::Ok, serialized_tilesets)))
Ok(Response::with((status::Ok, "{}"))) Ok(Response::with((status::Ok, "{}")))
} }
pub fn tileset(_req: &mut Request, _caps: Captures) -> IronResult<Response> { pub fn tileset(req: &mut Request, caps: Captures) -> IronResult<Response> {
let tilesets = req.get::<Read<tileset::Tilesets>>().unwrap();
let tileset = match tilesets.get(&caps["tileset"]) {
Some(tileset) => tileset,
None => return Ok(Response::with((status::NotFound)))
};
let mut tilejson_builder = TileJSONBuilder::new(); let mut tilejson_builder = TileJSONBuilder::new();
tilejson_builder.name(&tileset.table);
tilejson_builder.name("some tileset!!11");
let tilejson = tilejson_builder.finalize(); let tilejson = tilejson_builder.finalize();
let serialized_tilejson = serde_json::to_string(&tilejson).unwrap();
let serialized_tilejson = serde_json::to_string(&tilejson).unwrap();
Ok(Response::with((status::Ok, serialized_tilejson))) Ok(Response::with((status::Ok, serialized_tilejson)))
} }
pub fn tile(req: &mut Request, caps: Captures) -> IronResult<Response> { pub fn tile(req: &mut Request, caps: Captures) -> IronResult<Response> {
let tilesets = req.get::<Read<db::Tilesets>>().unwrap(); let tilesets = req.get::<Read<tileset::Tilesets>>().unwrap();
let tileset = match tilesets.get(&caps["tileset"]) { let tileset = match tilesets.get(&caps["tileset"]) {
Some(tileset) => tileset, Some(tileset) => tileset,
None => return Ok(Response::with((status::NotFound))) None => return Ok(Response::with((status::NotFound)))
@ -42,7 +50,7 @@ pub fn tile(req: &mut Request, caps: Captures) -> IronResult<Response> {
let x: &i32 = &caps["x"].parse().unwrap(); let x: &i32 = &caps["x"].parse().unwrap();
let y: &i32 = &caps["y"].parse().unwrap(); let y: &i32 = &caps["y"].parse().unwrap();
let tile = match db::get_tile(conn, &tileset, z, x, y) { let tile = match tileset::get_tile(conn, &tileset, z, x, y) {
Ok(tile) => tile, Ok(tile) => tile,
Err(error) => { Err(error) => {
eprintln!("Couldn't get a tile: {}", error); eprintln!("Couldn't get a tile: {}", error);

92
src/tileset.rs Normal file
View File

@ -0,0 +1,92 @@
use std::error::Error;
use std::collections::HashMap;
use iron::typemap::Key;
use super::db::PostgresConnection;
#[derive(Serialize, Debug)]
pub struct Tileset {
schema: String,
pub table: String,
geometry_column: String,
srid: i32,
extent: i32,
buffer: i32,
clip_geom: bool,
geometry_type: String,
query: String
}
pub struct Tilesets;
impl Key for Tilesets { type Value = HashMap<String, Tileset>; }
pub fn get_tilesets(conn: PostgresConnection) -> Result<HashMap<String, Tileset>, Box<Error>> {
let query = "
select
f_table_schema, f_table_name, f_geometry_column, srid, type
from geometry_columns
";
let default_extent = 4096;
let default_buffer = 0; // 256
let default_clip_geom = true;
let mut tilesets = HashMap::new();
let rows = try!(conn.query(&query, &[]));
for row in &rows {
let schema: String = row.get("f_table_schema");
let table: String = row.get("f_table_name");
let id = format!("{}.{}", schema, table);
let geometry_column: String = row.get("f_geometry_column");
let srid: i32 = row.get("srid");
let transformed_geometry = if srid == 3857 {
geometry_column.clone()
} else {
format!("ST_Transform({0}, 3857)", geometry_column)
};
let query = format!(
"SELECT ST_AsMVT(q, '{1}', {4}, '{2}') FROM (\
SELECT ST_AsMVTGeom(\
{3}, \
TileBBox($1, $2, $3, 3857), \
{4}, \
{5}, \
{6}\
) AS geom FROM {0}.{1}\
) AS q;",
schema,
table,
geometry_column,
transformed_geometry,
default_extent,
default_buffer,
default_clip_geom
);
let tileset = Tileset {
schema: schema,
table: table,
geometry_column: geometry_column,
srid: srid,
extent: default_extent,
buffer: default_buffer,
clip_geom: default_clip_geom,
geometry_type: row.get("type"),
query: query
};
tilesets.insert(id, tileset);
}
Ok(tilesets)
}
pub fn get_tile(conn: PostgresConnection, tileset: &Tileset, z: &i32, x: &i32, y: &i32) -> Result<Vec<u8>, Box<Error>> {
let rows = try!(conn.query(&tileset.query, &[&z, &x, &y]));
let tile = rows.get(0).get("st_asmvt");
Ok(tile)
}