Html5 download file from redux

Synchronous action creators are just functions which return an object with the type of action and payload. Because in asynchronous code like if we fetching something from the backend API it takes some time to get the data from the backend so that we are not dispatching the action immediately instead of we are dispatching the action only when the data comes back from the backend API.

For Asynchronous actions we need to install a new package called redux-thunk. If you want to learn about thunks then check out my previous tutorial. Open your index. Next, we invoked the applyMiddleware function by passing the thunk as its argument. This is actually even more complex when you want to download files using Axios and some means of security. To prevent anyone else from spending too much time in figuring this out, let me walk you through this. These steps are mostly doable - but are complicated considerably by the browser's relation to CORS.

One step at a time:. If we would like the server to suggest a filename for the download, we must inform the browser that it is "OK" for JavaScript to be granted access to other headers where suggested filename would be transported. Let us assume - for the sake of discussion - that we want the server to transmit the suggested filename within a HTTP header called X-Suggested-Filename. This is done in different ways depending on your chosen technology stack.

I will sketch an example using the JavaEE 7 standard which should emit an Excel report:. The service now emits the binary document an Excel report, in this case , sets the correct content type - and also sends a custom HTTP header containing the suggested filename to use when saving the document.

I needed file contents in an array and that's what view was for! But state is not changing right? Is that fine? Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.

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