Added ak-zblock-show with appropriate route in API with caching feature

2 files changed, 38 insertions, 0 deletions

diff --git a/api/routes/getZblock/index.js b/api/routes/getZblock/index.js
new file mode 100644
index 0000000..af14ae3
--- /dev/null
+++ b/api/routes/getZblock/index.js
@@ -0,0 +1,35 @@
+const { spawn } = require('child_process');
+const fs = require("fs");
+const config = require("../../config");
+
+/*
+ * Gets the local latest zblock
+ *
+ * Returns:
+ *     - JSON object
+ *     { zlatest: "Qm..." }
+ *
+ */
+module.exports = (req, res) => {
+    const command = spawn("ak-zblock-cache",[req.query.zblock]);
+    command.stdout.on("data", data => {
+    });
+
+    command.stderr.on("data", data => {
+            console.log(`stderr: ${data}`);
+    });
+
+    command.on('error', (error) => {
+            console.log(`error: ${error.message}`);
+    });
+
+    command.on("close", code => {
+        console.log(`child process exited with code ${code}`);
+
+        if ( code == 0 ) {
+            res.send(JSON.parse(fs.readFileSync(config.zblockDir+"/"+req.query.zblock)));
+        } else {
+            res.send({"error":"error"});
+        }
+    });
+};
diff --git a/api/routes/index.js b/api/routes/index.js
index b771758..5842757 100644
--- a/api/routes/index.js
+++ b/api/routes/index.js
@@ -10,6 +10,7 @@ const getSBlock = require('./getSBlock');
 const getZChain = require('./getZChain');
 const receiveZBlock = require('./receiveZBlock');
 const receiveZChain = require('./receiveZChain');
+const getZblock = require('./getZblock');
 const corsOptions = {
     origin: '*',
     optionsSuccessStatus: 200 // some legacy browsers (IE11, various SmartTVs) choke on 204
@@ -34,6 +35,8 @@ router.route(settings.URL_PREFIX+'/sblock').get(getSBlock);
 router.route(settings.URL_PREFIX+'/zchain').get(getZChain);
 // Returns latest zblock from node's local chain
 router.route(settings.URL_PREFIX+'/zlatest').get(getZLatest);
+// Returns zblock
+router.route(settings.URL_PREFIX+'/zblock').get(getZblock);
 // Send a block to the node (zchain block)
 router.route(settings.URL_PREFIX+'/sblk').post(receiveZBlock);
 // Send a zchain link to the node (refering to a valid zchain out there)