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Forum Discussion
hayk
8 years agoExplorer | Level 4
The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*'
Hey guys I am using npm package to work with dropbox. However when I try to upload a file I get the following error
XMLHttpRequest cannot load https://content.dropboxapi.com/2/files/upload. Response to preflight request doesn't pass access control check: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. Origin 'http://localhost:3000' is therefore not allowed access. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.
Any idea why is this happening and what can I do about this?
Thank you.
I used an example Meteor app, and in server/main.js I just used the node library normally:
var Dropbox = require('dropbox');
const dbx = new Dropbox({accessToken: "<ACCESS_TOKEN>"}) dbx.filesUpload({path: "/test_207235.txt", contents: "some test data"}) .then(function (response) { console.log(response) }) .catch(function (error) { console.error(error) })
That uploaded the file successfully. Attempting the same in client/main.js failed with the same error you got.
I don't have a more advanced sample available though. The filesUpload method takes a string or buffer, but beyond that I'm afraid I can't offer much insight as to how to manage files/data in node and Meteor themselves.
If you want to upload directly from the user's browser, you can use the JavaScript SDK in the browser's JavaScript. E.g., include the library via a script tag in your HTML, and run JavaScript from a script tag, as shown in the basic browser example.
- Greg-DBDropbox StaffThanks for the post. We'll be happy to help with this. Can you let me know what version of the library you're using, and share the code that reproduces this issue? Thanks in advance!
- haykExplorer | Level 4
Hi Greg!
I'm using dropbox@2.5.1
And here is the code
import Dropbox from 'dropbox' uploadCallback (file,self) { // TODO: Integrate dropbox with its SDK // TODO: Pass the link to the editor // const self = this console.log(self) return new Promise( (resolve, reject) => { console.log('uploadCallback promise') console.log('file', file) const dataObject = { file, resolve, reject } console.log('dataObject', dataObject) self.uploadToDropbox(dataObject) } ) } uploadToDropbox (dataObject) { const dbx = new Dropbox({accessToken: Meteor.settings.public.dropbox.accessToken}) console.log('dataObject', dataObject) const { file } = dataObject console.log('file', file) const { resolve, reject } = dataObject console.log('resolve', resolve) console.log('reject', reject) dbx.filesUpload({path: '/' + file.name, contents: file}) .then(function (response) { console.log(response) resolve({ data: { link: 'http://dummy_image_src.com' } }) }) .catch(function (error) { console.error(error) reject('some error') }) return false }
Do you have any ideas?
- Greg-DBDropbox Staff
Thanks! Based on your code, it looks like you're running this in a Meteor app.
I tried it out in a Meteor app, and I wasn't able to reproduce the issue when making an upload code in the 'server' code, but I was when I tried to run it in the 'client' code. Are you running this in the client code?
I'm not sure offhand if this is something we can support, so instead you can either:
- run this in your 'server' code.
- import the JavaScript SDK as a JavaScript library on the page and use the normal browser interface.
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