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
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:
- cargo build --verbose --all
- cargo test --verbose --all

267
Cargo.lock generated
View File

@ -1,9 +1,9 @@
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[[package]]
@ -16,13 +16,13 @@ name = "base64"
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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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@ -141,12 +144,12 @@ version = "0.10.13"
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@ -168,7 +171,7 @@ name = "iovec"
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@ -178,29 +181,32 @@ version = "0.6.0"
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@ -211,31 +217,48 @@ name = "lazy_static"
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@ -254,7 +277,15 @@ name = "memchr"
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@ -288,15 +319,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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@ -361,9 +392,9 @@ name = "postgres"
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@ -374,14 +405,14 @@ version = "0.3.1"
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@ -391,11 +422,11 @@ name = "postgres-shared"
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@ -426,33 +457,33 @@ dependencies = [
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View File

@ -10,6 +10,7 @@ path = "src/main.rs"
[dependencies]
regex = "0.2.2"
iron = "0.6.0"
iron-test = "0.6.0"
rererouter = "0.1.1"
persistent = "0.4.0"
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::collections::HashMap;
use iron::typemap::Key;
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());
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 regex;
extern crate iron_test;
extern crate persistent;
extern crate tilejson;
extern crate rererouter;
extern crate r2d2;
extern crate r2d2_postgres;
// #[macro_use] extern crate lazy_static;
#[macro_use]
extern crate serde_derive;
@ -12,8 +13,6 @@ extern crate serde_derive;
extern crate serde;
extern crate serde_json;
extern crate tilejson;
use std::env;
use persistent::Read;
use rererouter::RouterBuilder;
@ -22,11 +21,9 @@ use iron::prelude::{Iron, Chain};
mod db;
mod cors;
mod routes;
mod tileset;
fn main() {
let conn_string: String = env::var("DATABASE_URL")
.expect("DATABASE_URL must be set");
pub fn app(conn_string: String) -> iron::Chain {
let mut router_builder = RouterBuilder::new();
router_builder.get(r"/index.json", routes::index);
router_builder.get(r"/(?P<tileset>[\w|\.]*)\.json", routes::tileset);
@ -39,8 +36,8 @@ fn main() {
match db::setup_connection_pool(&conn_string, 10) {
Ok(pool) => {
let conn = pool.get().unwrap();
let tilesets = db::get_tilesets(conn).unwrap();
chain.link(Read::<db::Tilesets>::both(tilesets));
let tilesets = tileset::get_tilesets(conn).unwrap();
chain.link(Read::<tileset::Tilesets>::both(tilesets));
chain.link(Read::<db::DB>::both(pool));
},
@ -52,8 +49,40 @@ fn main() {
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 bind_addr = format!("0.0.0.0:{}", port);
println!("Server has been started on {}.", bind_addr);
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 super::db;
use super::tileset;
use tilejson::TileJSONBuilder;
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, "{}")))
}
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();
tilejson_builder.name("some tileset!!11");
tilejson_builder.name(&tileset.table);
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)))
}
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"]) {
Some(tileset) => tileset,
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 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,
Err(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)
}