New API route to fetch content from IPFS hashes that is cached in the filesystem

2 files changed, 35 insertions, 0 deletions

diff --git a/api/routes/getInnerIPFSContent/index.js b/api/routes/getInnerIPFSContent/index.js
new file mode 100644
index 0000000..555d2a3
--- /dev/null
+++ b/api/routes/getInnerIPFSContent/index.js
@@ -0,0 +1,32 @@
+const { spawn } = require('child_process');
+const fs = require("fs");
+const config = require("../../config");
+
+/*
+ * Gets the local latest zblock
+ *
+ * Returns:
+ *     - JSON object
+ *     { zlatest: "Qm..." }
+ *
+ */
+function fetchZblock(zblock, res){
+    res.send(fs.readFileSync(config.workDir+"/ipfs/"+zblock));
+};
+module.exports = (req, res) => {
+    console.log(req.query)
+    if ( (req.query.ipfs) && req.query.ipfs.length === 46 ){
+        regex= /Qm[A-Za-z0-9]{44}/;
+        if (regex.test(req.query.ipfs)){
+            if (req.query.ipfs === "QmbFMke1KXqnYyBBWxB74N4c5SBnJMVAiMNRcGu6x1AwQH" ){
+                res.send({errno:"Genesis block"});
+            } else {
+                fetchZblock(req.query.ipfs,res);
+            }
+        } else {
+            res.send({errno:"Invalid data: regexp failed to pass"});
+        }
+    } else {
+        res.send({errno:"Invalid data: no valid zblock was provided"});
+    }
+}
diff --git a/api/routes/index.js b/api/routes/index.js
index 5842757..2b649e9 100644
--- a/api/routes/index.js
+++ b/api/routes/index.js
@@ -11,6 +11,7 @@ const getZChain = require('./getZChain');
 const receiveZBlock = require('./receiveZBlock');
 const receiveZChain = require('./receiveZChain');
 const getZblock = require('./getZblock');
+const getInnerIPFSContent = require('./getInnerIPFSContent');
 const corsOptions = {
     origin: '*',
     optionsSuccessStatus: 200 // some legacy browsers (IE11, various SmartTVs) choke on 204
@@ -35,6 +36,8 @@ 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 content
+router.route(settings.URL_PREFIX+'/content').get(getInnerIPFSContent);
 // Returns zblock
 router.route(settings.URL_PREFIX+'/zblock').get(getZblock);
 // Send a block to the node (zchain block)