fix ERR_STRING_TOO_LONG from docker response

lib/modem.js

@@ -11,7 +11,9 @@ var querystring = require('querystring'),
   splitca = require('split-ca'),
   os = require('os'),
   isWin = os.type() === 'Windows_NT',
-  stream = require('stream');
+  stream = require('stream'),
+  streamJson = require('stream-json'),
+  Asm = require('stream-json/Assembler');
 
 var defaultOpts = function () {
   var host;
@@ -336,15 +338,15 @@ Modem.prototype.buildRequest = function (options, context, data, callback) {
 
       res.on('end', function () {
         var buffer = Buffer.concat(chunks);
-        var result = buffer.toString();
-
-        debug('Received: %s', result);
-
-        var json = utils.parseJSON(result) || buffer;
-        if (finished === false) {
-          finished = true;
-          self.buildPayload(null, context.isStream, context.statusCodes, false, req, res, json, callback);
-        }
+        var parser = stream.Readable.from(buffer).pipe(streamJson.parser());
+        var asm = Asm.connectTo(parser);
+        asm.on('done', asm => {
+          var json = asm.current || buffer;
+          if (finished === false) {
+            finished = true;
+            self.buildPayload(null, context.isStream, context.statusCodes, false, req, res, json, callback);
+          }
+        });
       });
     }
   });

package.json

@@ -20,7 +20,8 @@
     "debug": "^4.1.1",
     "readable-stream": "^3.5.0",
     "split-ca": "^1.0.1",
-    "ssh2": "^1.15.0"
+    "ssh2": "^1.15.0",
+    "stream-json": "^1.8.0"
   },
   "devDependencies": {
     "chai": "~4.2.0",