javascript - Amazon S3 file upload: POST 405 Method Not Allowed using ember-uploader -

i'm using ember-uploader upload file amazon s3. component simple:

import ember 'ember'; import emberuploader 'ember-uploader';  export default emberuploader.filefield.extend({   signingurl: '/sign',    filesdidchange (files) {     const uploader = emberuploader.s3uploader.create({       signingurl: this.get('signingurl'),     });      uploader.on('didupload', response => {       console.log('upload successful!');     });      if (!ember.isempty(files)) {       uploader.upload(files[0]);     }   } }); 

i've written simple node express script generates pre-signed url:

var aws = require('aws-sdk'); var config = new aws.config({   accesskeyid: 'access-key-id',    secretaccesskey: 'secret-access-key',    region: 'us-east-1', }); aws.config = config; var bucketname = 'bucket-name';  var express = require('express'); var app = express(); app.use(fileupload()); app.use(function(req, res, next) {   req.headers['if-none-match'] = 'no-match-for-this';   res.header("access-control-allow-origin", "*");   res.header("access-control-allow-headers", "origin, x-requested-with, content-type, accept");   next();     });  app.get('/sign', function (req, res) {   const s3 = new aws.s3();   const filename = req.query['name'];   const filetype = req.query['type'];   const s3params = {     bucket: bucketname,     key: filename,     expires: 60,     contenttype: filetype,     acl: 'public-read'   };   s3.getsignedurl('putobject', s3params, (err, data) => {     if(err){       console.log(err);       return res.end();     }     console.log('data =>', data);      const returndata = {       signeddata: data,       endpoint: `https://${bucketname}.s3.amazonaws.com/${filename}`,     };     res.write(json.stringify(returndata));     res.end();   }); }); 

when try upload file, component generates post request https://bucket-name.s3.amazonaws.com/file.file-format

the response 405 method not allowed

it's unusual doing put request makes request work fine. however, ember-uploader appears post requests s3 uploads.

my s3 bucket policy is:

{     "version": "2012-10-17",     "statement": [         {             "sid": "stmtxxxxxxx",             "effect": "allow",             "principal": "*",             "action": "s3:*",             "resource": [                 "arn:aws:s3:::ingagedtest2",                 "arn:aws:s3:::ingagedtest2/*"             ]         }     ] } 

my s3 bucket cors configuration is:

<corsconfiguration>   <corsrule>     <allowedorigin>*</allowedorigin>     <allowedmethod>get</allowedmethod>     <allowedmethod>post</allowedmethod>     <allowedheader>*</allowedheader>    </corsrule> </corsconfiguration> 

i'm testing on http://localhost:3000 server. pointers in right direction appreciated! cannot figure out missing.