keep support working for node v0.10.x

index.js

@@ -3,6 +3,18 @@ var isgeocsv = require('detect-geocsv');
 var invalid = require('./lib/invalid');
 var fs = require('fs');
 var bf = require('buffer');
+var semver = require('semver');
+
+if (semver.major(process.version) > 0) {
+    function zlib_gunzip(buffer,zlib_opts,callback) {
+        zlib.gunzip(buffer, zlib_opts, callback);
+    }
+} else {
+    // node v0.10 does not support options passed to zlib.gunzip
+    function zlib_gunzip(buffer,zlib_opts,callback) {
+        zlib.gunzip(buffer, callback);
+    }
+}
 
 module.exports.sniff = sniff;
 module.exports.waft = waft;
@@ -76,8 +88,7 @@ function sniff(buffer, callback) {
         return callback(null, 'csv');
     }
 
-    zlib.gunzip(buffer, {finishFlush: zlib.Z_SYNC_FLUSH}, function (err, output) {
-        if (err) return callback(invalid('Unknown filetype'));
+    function returnOutput(output,callback) {
         //check for tm2z
         if (output.toString('ascii', 257, 262) === 'ustar') return callback(null, 'tm2z');
         //check for serial tiles
@@ -92,6 +103,12 @@ function sniff(buffer, callback) {
 
         //default to unknown
         return callback(invalid('Unknown filetype'));
+    }
+
+    var zlib_opts = {finishFlush: zlib.Z_SYNC_FLUSH };
+    zlib_gunzip(buffer, zlib_opts, function (err, output) {
+        if (err) return callback(invalid('Unknown filetype'));
+        returnOutput(output,callback);
     });
 }
 

package.json

@@ -9,7 +9,8 @@
   },
   "dependencies": {
     "detect-geocsv": "0.1.0",
-    "buffer": "^3.2.2"
+    "buffer": "^3.2.2",
+    "semver": "~5.3.0"
   },
   "devDependencies": {
     "tape": "3.0.x",