Node js - get raw request body using Express

Question

When I use Express  and my code is   app use express bodyParser       How would I get the raw request body

User · Answer

BE CAREFUL with those other answers as they will not play properly with bodyParser if you're looking to also support json, urlencoded, etc. To get it to work with bodyParser you should condition your handler to only register on the Content-Type header(s) you care about, just like bodyParser itself does.

To get the raw body content of a request with Content-Type: "text/plain" into req.rawBody you can do:

app.use(function(req, res, next) {
  var contentType = req.headers['content-type'] || ''
    , mime = contentType.split(';')[0];

  if (mime != 'text/plain') {
    return next();
  }

  var data = '';
  req.setEncoding('utf8');
  req.on('data', function(chunk) {
    data += chunk;
  });
  req.on('end', function() {
    req.rawBody = data;
    next();
  });
});

User · Answer

Use body-parser Parse the body with what it will be   app use bodyParser text      app use bodyParser urlencoded      app use bodyParser raw      app use bodyParser json      ie  If you are supposed to get raw text file  run  text     Thats what body-parser currently supports

User · Answer

This is a variation on hexacyanide s answer above  This middleware also handles the  data  event but does not wait for the data to be consumed before calling  next   This way both this middleware and bodyParser may coexist  consuming the stream in parallel   app use function req  res  next      req rawBody         req setEncoding  utf8       req on  data   function chunk         req rawBody    chunk           next        app use express bodyParser

User · Answer

I got a solution that plays nice with bodyParser  using the verify callback in bodyParser  In this code  I am using it to get a sha1 of the content and also getting the raw body   app use bodyParser json       verify  function req  res  buf  encoding                sha1 content         var hash   crypto createHash  sha1            hash update buf           req hasha   hash digest  hex            console log  hash   req hasha               get rawBody                 req rawBody   buf toString            console log  rawBody   req rawBody                 I am new in Node js and express js  started yesterday  literally   so I d like to hear comments on this solution

User · Answer

Change the way body-parser is used const bodyParser   require  body-parser     var rawBodySaver   function  req  res  buf  encoding      if  buf  amp  amp  buf length        req rawBody   buf toString encoding     utf8          app use bodyParser json   verify  rawBodySaver  extended  true             Now we can access raw-body any where in out application as follows request rawBody

User · Answer

Edit 2  Release 1 15 2 of the body parser module introduces raw mode  which returns the body as a Buffer  By default  it also automatically handles deflate and gzip decompression  Example usage  var bodyParser   require  body-parser    app use bodyParser raw options     app get path  function req  res         req body is a Buffer object      By default  the options object has the following default options  var options       inflate  true    limit   100kb     type   application octet-stream      If you want your raw parser to parse other MIME types other than application octet-stream  you will need to change it here  It will also support wildcard matching such as     or   application   Note  The following answer is for versions before Express 4  where middleware was still bundled with the framework  The modern equivalent is the body-parser module  which must be installed separately  The rawBody property in Express was once available  but removed since version 1 5 1  To get the raw request body  you have to put in some middleware before using the bodyParser  You can also read a GitHub discussion about it here  app use function req  res  next      req rawBody         req setEncoding  utf8       req on  data   function chunk         req rawBody    chunk           req on  end   function         next              app use express bodyParser      That middleware will read from the actual data stream  and store it in the rawBody property of the request  You can then access the raw body like this  app post      function req  res         do something with req rawBody      use req body for the parsed body      Edit  It seems that this method and bodyParser refuse to coexist  because one will consume the request stream before the other  leading to whichever one is second to never fire end  thus never calling next    and hanging your application  The simplest solution would most likely be to modify the source of bodyParser  which you would find on line 57 of Connect s JSON parser  This is what the modified version would look like  var buf       req setEncoding  utf8    req on  data   function chunk   buf    chunk     req on  end   function       req rawBody   buf    var first   buf trim   0              You would find the file at this location   node modules express node modules connect lib middleware json js

User · Answer

This solution worked for me   var rawBodySaver   function  req  res  buf  encoding      if  buf  amp  amp  buf length        req rawBody   buf toString encoding     utf8           app use bodyParser json   verify  rawBodySaver      app use bodyParser urlencoded   verify  rawBodySaver  extended  true      app use bodyParser raw   verify  rawBodySaver  type               When I use solution with req on  data   function chunk        it not working on chunked request body

[node.js] Node.js - get raw request body using Express

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