adds GET handling

.circleci/config.yml

@@ -34,6 +34,8 @@ jobs:
               -H 'Content-Type: application/json' \
               http://localhost:3000)
             [ "$RESULT" = "[101,100]" ]
+            RESULT=$(curl http://localhost:3000/\?lat\=51.3\&lng\=13.4)
+            [ "$RESULT" = "101" ]
             docker stop elevation
 
       - run:
@@ -57,6 +59,8 @@ jobs:
               -H 'Content-Type: application/json' \
               http://localhost:3000)
             [ "$RESULT" = "[101,100]" ]
+            RESULT=$(curl http://localhost:3000/\?lat\=51.3\&lng\=13.4)
+            [ "$RESULT" = "101" ]
             docker stop elevation
 
       - run:

index.js

@@ -1,5 +1,6 @@
 const { json, send } = require("micro");
 const limitedMap = require("limited-map");
+const query = require("micro-query");
 const { FileTileSet, S3TileSet } = require("./tileset");
 
 const cacheSize = process.env.TILE_SET_CACHE || 128;
@@ -11,13 +12,13 @@ const tiles = tileFolder.startsWith("s3://")
   ? new S3TileSet({ cacheSize })
   : new FileTileSet(tileFolder, { cacheSize });
 
-module.exports = async (req, res) => {
-  if (req.method !== "POST") {
-    return send(res, 405, { error: "Only POST allowed" });
-  }
-
+async function handlePOST(req, res) {
   const payload = await json(req, { limit: maxPostSize });
-  if (!payload || Object.keys(payload).length === 0) {
+  if (
+    !payload ||
+    !Array.isArray(payload) ||
+    !payload.every(([lat, lng]) => Number.isFinite(lat) && Number.isFinite(lng))
+  ) {
     return send(res, 400, {
       error:
         "Invalid Payload. Expected a JSON array with latitude-longitude pairs: [[lat, lng], ...]"
@@ -30,4 +31,35 @@ module.exports = async (req, res) => {
     maxParallelProcessing
   );
   return result;
+}
+
+async function handleGET(req, res) {
+  const reqQuery = query(req);
+  const lat = parseFloat(reqQuery.lat);
+  const lng = parseFloat(reqQuery.lng);
+  if (lat == null || !Number.isFinite(lat)) {
+    return send(res, 400, {
+      error:
+        "Invalid Latitude. Expected a float number as query parameter: ?lat=12.3&lng=45.6"
+    });
+  }
+  if (lng == null || !Number.isFinite(lng)) {
+    return send(res, 400, {
+      error:
+        "Invalid Longitude. Expected a float number as query parameter: ?lat=12.3&lng=45.6"
+    });
+  }
+  const result = await tiles.getElevation([lat, lng]);
+  return result;
+}
+
+module.exports = async (req, res) => {
+  switch (req.method) {
+    case "POST":
+      return handlePOST(req, res);
+    case "GET":
+      return handleGET(req, res);
+    default:
+      return send(res, 405, { error: "Only GET or POST allowed" });
+  }
 };

package.json

@@ -12,7 +12,8 @@
   "dependencies": {
     "limited-map": "^0.0.1",
     "lru-memoize": "^1.0.2",
-    "micro": "^9.3.2"
+    "micro": "^9.3.2",
+    "micro-query": "^0.3.0"
   },
   "devDependencies": {
     "prettier": "^1.14.0"

yarn.lock

@@ -79,6 +79,12 @@ lru-memoize@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/lru-memoize/-/lru-memoize-1.0.2.tgz#f5ae84d288e7d55fec8388ec0bd725621bc815d0"
 
+micro-query@^0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/micro-query/-/micro-query-0.3.0.tgz#10bd973d6248379ab5847ab92d3365fc344f309d"
+  dependencies:
+    qs "6.5.2"
+
 micro@^9.3.2:
   version "9.3.2"
   resolved "https://registry.yarnpkg.com/micro/-/micro-9.3.2.tgz#41e249fe96a33db056f0a5dabb32c8fd4b69c5ca"
@@ -93,6 +99,10 @@ prettier@^1.14.0:
   version "1.14.0"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.14.0.tgz#847c235522035fd988100f1f43cf20a7d24f9372"
 
+qs@6.5.2:
+  version "6.5.2"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.5.2.tgz#cb3ae806e8740444584ef154ce8ee98d403f3e36"
+
 raw-body@2.3.2:
   version "2.3.2"
   resolved "https://registry.yarnpkg.com/raw-body/-/raw-body-2.3.2.tgz#bcd60c77d3eb93cde0050295c3f379389bc88f89"