Added routes to merkle leafs and file chunks

1 files changed, 61 insertions, 0 deletions

diff --git a/api/routes/getTr/index.js b/api/routes/getTr/index.js
new file mode 100644
index 0000000..c3c058f
--- /dev/null
+++ b/api/routes/getTr/index.js
@@ -0,0 +1,61 @@
+const { spawn } = require('child_process');
+const fs = require("fs");
+const config = require("../../config");
+
+/*
+ * Gets a file chunk
+ *
+ * Returns:
+ *  the chunk
+ *
+ */
+function fetchFtr(tr, res){
+    const command = spawn("cat",[config.workDir+"/ftr/"+tr]);
+    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 ) {
+            const path = config.workDir+"/ftr/"+tr;
+            console.log(path)
+            try {
+                if(fs.existsSync(path)){
+                    res.send(fs.readFileSync(path));
+                }
+            } catch (error) {
+                res.send({"error":error.message});
+            }
+        } else if ( code === 2){
+            res.send({"error":"The roof is on fire"});
+        } else {
+            res.send({"error":"invalid or unreachable"});
+        }
+    });
+};
+module.exports = (req, res) => {
+    console.log(req.params)
+    if ( (req.params.tr) && req.params.tr.length === 128 ){
+        regex= /[a-f0-9]{128}/;
+        if (regex.test(req.params.tr)){
+            if (req.params.tr === "QmbFMke1KXqnYyBBWxB74N4c5SBnJMVAiMNRcGu6x1AwQH" ){
+                res.send({error:"Genesis block"});
+            } else {
+                fetchFtr(req.params.tr,res);
+            }
+        } else {
+            res.send({error:"Invalid data: regexp failed to pass"});
+        }
+    } else {
+        res.send({error:"Invalid data: no valid zblock was provided"});
+    }
+}