New routes and fixes

1 files changed, 71 insertions, 0 deletions

diff --git a/api/routes/getIPFSHash/index.js b/api/routes/getIPFSHash/index.js
new file mode 100644
index 0000000..f412c80
--- /dev/null
+++ b/api/routes/getIPFSHash/index.js
@@ -0,0 +1,71 @@
+const { spawn } = require('child_process');
+const fs = require("fs");
+const config = require("../../config");
+
+/*
+ * Returns a cached zblock
+ *
+ * Returns:
+ *     - JSON object
+ *
+ */
+function fetchIPFShash(zblock, res)
+{
+    regex= /Qm[A-Za-z0-9]{44}/;
+    if (regex.test(zblock)){
+        const path = `${config.ipfsArtifactsDir}/${zblock}`;
+        console.log(path)
+        try
+        {
+            if(fs.existsSync(path))
+            {
+                res.writeHead(200, {'Content-Type': 'application/json'});
+                res.end(JSON.stringify(JSON.parse(fs.readFileSync(path))));
+            }
+            else
+            {
+                res.writeHead(404, {'Content-Type': 'application/json'});
+                res.end(JSON.stringify({error:"invalid or unreachable"}));
+            }
+        }
+        catch (error)
+        {
+            res.writeHead(404, {'Content-Type': 'application/json'});
+            res.end(JSON.stringify({error:error.message}));
+        }
+    }
+    else
+    {
+        res.writeHead(404, {'Content-Type': 'application/json'});
+        res.end(JSON.stringify({error:"Invalid data: regexp failed to pass"}));
+    }
+};
+
+module.exports = (req, res) => {
+    var args = req.url.split("/");
+    if ( (args[2] === 'ipfs_hash') && args[3] && typeof args[3] === "string" && args[3].length === 46 ){
+        regex= /Qm[A-Za-z0-9]{44}/;
+        if (regex.test(args[3]))
+        {
+            if (args[3] === "QmbFMke1KXqnYyBBWxB74N4c5SBnJMVAiMNRcGu6x1AwQH" )
+            {
+                res.writeHead(404, {'Content-Type': 'application/json'});
+                res.end(JSON.stringify({error:"Genesis block"}));
+            }
+            else
+            {
+                fetchIPFShash(args[3],res);
+            }
+        }
+        else
+        {
+            res.writeHead(404, {'Content-Type': 'application/json'});
+            res.end(JSON.stringify({error:"Invalid data: regexp failed to pass"}));
+        }
+    }
+    else
+    {
+        res.writeHead(404, {'Content-Type': 'application/json'});
+        res.end(JSON.stringify({error:"Invalid data: no valid zblock was provided"}));
+    }
+}