CODEWITHSUNDEEP
ruby-on-railsjsondevise
scientiffic
scientiffic

Reputation: 9415

MultiJson::LoadError unexpected token

I'm trying to follow this tutorial for creating token authentication using Devise:

http://www.strukturedkaos.com/2011/09/19/soup-to-nuts-token-authentication-for-android-using-rails-3-devise/

However, when I try to confirm that the sessions_controller outlined in the tutorial is working correctly, I get the error:

MultiJson::LoadError (795: unexpected token at '{'user':{'username':'test', 'password':'password'}}'):
  json (1.8.0) lib/json/common.rb:155:in `parse'
  json (1.8.0) lib/json/common.rb:155:in `parse'
  multi_json (1.7.7) lib/multi_json/adapters/json_common.rb:16:in `load'
  multi_json (1.7.7) lib/multi_json/adapter.rb:19:in `load'
  multi_json (1.7.7) lib/multi_json.rb:130:in `load'
  activesupport (3.2.8) lib/active_support/json/decoding.rb:15:in `decode'
  actionpack (3.2.8) lib/action_dispatch/middleware/params_parser.rb:47:in `parse_formatted_parameters'
  actionpack (3.2.8) lib/action_dispatch/middleware/params_parser.rb:17:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/flash.rb:242:in `call'
  rack (1.4.5) lib/rack/session/abstract/id.rb:210:in `context'
  rack (1.4.5) lib/rack/session/abstract/id.rb:205:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/cookies.rb:339:in `call'
  activerecord (3.2.8) lib/active_record/query_cache.rb:64:in `call'
  activerecord (3.2.8) lib/active_record/connection_adapters/abstract/connection_pool.rb:473:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
  activesupport (3.2.8) lib/active_support/callbacks.rb:405:in `_run__4387220243864305605__call__1717915382536916025__callbacks'
  activesupport (3.2.8) lib/active_support/callbacks.rb:405:in `__run_callback'
  activesupport (3.2.8) lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
  activesupport (3.2.8) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (3.2.8) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/reloader.rb:65:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
  railties (3.2.8) lib/rails/rack/logger.rb:26:in `call_app'
  railties (3.2.8) lib/rails/rack/logger.rb:16:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/request_id.rb:22:in `call'
  rack (1.4.5) lib/rack/methodoverride.rb:21:in `call'
  rack (1.4.5) lib/rack/runtime.rb:17:in `call'
  activesupport (3.2.8) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
  rack (1.4.5) lib/rack/lock.rb:15:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/static.rb:62:in `call'
  railties (3.2.8) lib/rails/engine.rb:479:in `call'
  railties (3.2.8) lib/rails/application.rb:223:in `call'
  rack (1.4.5) lib/rack/content_length.rb:14:in `call'
  railties (3.2.8) lib/rails/rack/log_tailer.rb:17:in `call'
  thin (1.5.1) lib/thin/connection.rb:81:in `block in pre_process'
  thin (1.5.1) lib/thin/connection.rb:79:in `catch'
  thin (1.5.1) lib/thin/connection.rb:79:in `pre_process'
  thin (1.5.1) lib/thin/connection.rb:54:in `process'
  thin (1.5.1) lib/thin/connection.rb:39:in `receive_data'
  eventmachine (1.0.3) lib/eventmachine.rb:187:in `run_machine'
  eventmachine (1.0.3) lib/eventmachine.rb:187:in `run'
  thin (1.5.1) lib/thin/backends/base.rb:63:in `start'
  thin (1.5.1) lib/thin/server.rb:159:in `start'
  rack (1.4.5) lib/rack/handler/thin.rb:13:in `run'
  rack (1.4.5) lib/rack/server.rb:268:in `start'
  railties (3.2.8) lib/rails/commands/server.rb:70:in `start'
  railties (3.2.8) lib/rails/commands.rb:55:in `block in <top (required)>'
  railties (3.2.8) lib/rails/commands.rb:50:in `tap'
  railties (3.2.8) lib/rails/commands.rb:50:in `<top (required)>'
  script/rails:6:in `require'
  script/rails:6:in `<main>'

This is the command that I test with:

curl -v -H 'Content-Type: application/json' -H 'Accept: application/json' -X POST http://localhost:3000/sessions -d "{'user':{'username':'test', 'password':'password'}}"

What am I doing wrong?

Upvotes: 6

Views: 9809

Answers (2)

Navid Rezaei
Navid Rezaei

Reputation: 1041

This error usually happens when the JSON is not written correctly. I suggest checking the JSON format using a tool like: http://www.jsoneditoronline.org/

Upvotes: 1

Steve Madsen
Steve Madsen

Reputation: 13791

JSON strings cannot be delimited by single quotes. You must use double quotes around your keys and values, and single quotes to escape the POST data from the shell.

curl -v -H 'Content-Type: application/json' -H 'Accept: application/json' -X POST http://localhost:3000/sessions -d '{"user":{"username":"test", "password":"password"}}'

Upvotes: 8

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