req body empty on posts

Question

All of a sudden this has been happening to all my projects   Whenever I make a post in nodejs using express and body-parser req body is an empty object   var express      require  express   var bodyParser   require  body-parser    var app   express       parse application x-www-form-urlencoded app use bodyParser urlencoded        parse application json app use bodyParser json     app listen 2000    app post      function  req  res      console log req body     populated    res send 200  req body         Via ajax and postman it s always empty   However via curl    curl -H  Content-Type  application json  -d    username   xyz   password   xyz    http   localhost 2000    it works as intended   I tried manually setting Content-type    application json in the former but I then always get 400 bad request  This has been driving me crazy   I thought it was that something updated in body-parser but I downgraded and it didn t help   Any help appreciated  thanks

User · Answer

In postman  even after following the accepted answer  I was getting an empty request body  The issue turned out to be not passing a header called   Content-Length    lt calculated when request is sent gt    This header was present by default  along with 5 others  which I have disabled  Enable this and you ll receive the request body

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Make sure   key     type    value     json    amp    key   Content-Type    value   application x-www-form-urlencoded   is in your postman request headers

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I solved this using multer as suggested above  but they missed giving a full working example  on how to do this  Basically this can happen when you have a form group with enctype  multipart form-data   Here s the HTML for the form I had    lt form action   stats  enctype  multipart form-data  method  post  gt     lt div class  form-group  gt       lt input type  file  class  form-control-file  name  uploaded file  gt       lt input type  text  class  form-control  placeholder  Number of speakers  name  nspeakers  gt       lt input type  submit  value  Get me the stats   class  btn btn-default  gt                 lt  div gt   lt  form gt    And here s how to use multer to get the values and names of this form with Express js and node js   var multer    require  multer   var upload   multer   dest     public data uploads      app post   stats   upload single  uploaded file    function  req  res          req file is the name of your file in the form above  here  uploaded file        req body will hold the text fields  if there were any     console log req file  req body

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Thank you all for your great answers   Spent quite some time searching for a solution  and on my side I was making an elementary mistake  I was calling bodyParser json   from within the function      x000D   x000D  app use    password    async  req  res  next    gt    x000D    bodyParser json   x000D          x000D    next   x000D     x000D   x000D   x000D    I just needed to do app use    password    bodyParser json    and it worked

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I made a really dumb mistake and forgot to define name attributes for inputs in my html file   So instead of    lt input type  password  class  form-control  id  password  gt    I have this    lt input type  password  class  form-control  id  password  name  password  gt    Now request body is populated like this    password   hhiiii

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Even when i was learning node js for the first time where i started learning it over web-app  i was having all these things done in well manner in my form  still i was not able to receive values in post request  After long debugging  i came to know that in the form i have provided enctype  multipart form-data  due to which i was not able to get values  I simply removed it and it worked for me

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A similar problem happened to me  I simply mixed the order of the callback params  Make sure your are setting up the callback functions in the correct order  At least for anyone having the same problem   router post      function req  res

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For express 4 16   no need to install body-parser  use the following  const express   require  express    const app   express    app use express json      app post   your path    req  res    gt        const body   req body

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I didn t have the name in my Input     my request was empty    glad that is finished and I can keep coding  Thanks everyone   Answer I used by Jason Kim   So instead of    lt input type  password  class  form-control  id  password  gt    I have this    lt input type  password  class  form-control  id  password  name  password  gt

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In Postman of the 3 options available for content type select  quot X-www-form-urlencoded quot  and it should work  Also to get rid of error message replace  app use bodyParser urlencoded     With  app use bodyParser urlencoded     extended  true       See https   github com expressjs body-parser The  body-parser  middleware only handles JSON and urlencoded data  not multipart As  SujeetAgrahari mentioned  body-parser is now inbuilt with express js  Use app use express json     to implement it in recent versions for JSON bodies  For URL encoded bodies  the kind produced by HTTP form POSTs  use app use express urlencoded

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I discovered  that it works when sending with content type   quot application json quot   in combination with server-side app use bodyParser json     Now I can send via var data    name  quot John quot   var xmlHttp   new XMLHttpRequest    xmlHttp open  quot POST quot   theUrl  false      false for synchronous request xmlHttp setRequestHeader  quot Content-type quot    quot application json quot    xmlHttp send data    and the result is available in request body name on the server

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I was using restify instead of express and ran into the same problem  The solution was to do   server use restify bodyParser

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I believe this can solve app use express json

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With Postman  to test HTTP post actions with a raw JSON data payload  select the raw option and set the following header parameters   Content-Type  application json   Also  be sure to wrap any strings used as keys values in your JSON payload in double quotes    The body-parser package will parse multi-line raw JSON payloads just fine          foo    bar      Tested in Chrome v37 and v41 with the Postman v0 8 4 13 extension  body-parser v1 12 2 and express v4 12 3  with the setup below   var express   require  express    var app   express    var bodyParser   require  body-parser        configure the app to use bodyParser   app use bodyParser urlencoded       extended  true      app use bodyParser json             Your routes and methods here

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My problem was creating the route first      require    routes routes   app   I shifted it to the end of the code before      app listen and it worked

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You have to check whether the body-parser middleware is set properly to the type of request json  urlencoded     If you have set   app use bodyParser json       then in postman you have to send the data as raw   https   i stack imgur com k9IdQ png postman screenshot  If you have set   app use bodyParser urlencoded       extended  true        then  x-www-form-urlencoded  option should be selected

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Change app use bodyParser urlencoded     in your code to   app use bodyParser urlencoded  extended   false       and in postman  in header change Content-Type value from  application x-www-form-urlencoded to application json  Ta -

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you should not do JSON stringify data  while sending through AJAX like below   This is NOT correct code   function callAjax url  data          ajax           url  url          type   POST           data  JSON stringify data           success  function d                alert  successs    JSON stringify d                             The correct code is   function callAjax url  data          ajax           url  url          type   POST           data  data          success  function d                alert  successs    JSON stringify d

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It seems if you do not use any encType  default is application x-www-form-urlencoded  then you do get text input fields but you wouldn t get file   If you have a form where you want to post text input and file then use multipart form-data encoding type and in addition to that use multer middleware  Multer will parse the request object and prepare req file for you and all other inputs fields will be available through req body

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My problem was I was creating the route first         router get   post data   myController postHandler            and registering the middleware after the route  app use bodyParser json       etc   due to app structure  amp  copy and pasting the project together from examples   Once I fixed the order to register middleware before the route  it all worked

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If you are doing with the postman  Please confirm these stuff when you are requesting API

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I had the same problem a few minutes ago  I tried everything possible in the above answers but any of them worked   The only thing I did  was upgrade Node JS version  I didn t know that upgrading could affect in something  but it did   I have installed Node JS version 10 15 0  latest version   I returned to 8 11 3 and everything is now working  Maybe body-parser module should take a fix on this

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I ran into this problem today  and what fixed it was to remove the content-type header in Postman  Very strange  Adding it here in case it helps someone   I was following the BeerLocker tutorial here  http   scottksmith com blog 2014 05 29 beer-locker-building-a-restful-api-with-node-passport

[node.js] req.body empty on posts

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