I have used three ways for downloading file — two ways for Save as functionality and one way to show the file content on browser itself. The above line create a Blob object with file content in response and expecting the file of JSON type. The above two lines create a URL that will open the file in browser in new window.
The above line shows the file content on browser, so it does not give you save as option. The above line uses ready-made FileSaver module that will open the file with Save as option. I have created service class to fetch file data from a server URL but I need to provide a link or button for downloading the file. In the view file I will give users two options for downloading the same file. I will use link as well as button for downloading the same file from the server.
In the service class I have used Http module which may not be found automatically. So I need to register it in providers array of NgModule. Run the Angular application angular-file-download by executing command ng serve --open. When you click on link or button for downloading file you will see below page with file save option:. Npm stands for node package manager, it is a dependency management tool for javascript applications.
This tool will help to install the libraries and other tools to support angular development. Visit nodejs download page here. Click on the downloaded node-vxx. Please click Next. By clicking next in previous step you will be asked to accept license, please accept by clicking checkbox and click Next. Click Install, this may need elevated permissions provided necessary rights requested.
See the answer to this post for avoiding the corrupt file. ArrayBuffer by default it ResponseContentType. Downloading file through ajax is always a painful process and In my view it is best to let server and browser do this work of content type negotiation. I am using Angular 4 with the 4. I modified an answer I found in Js' Technical Blog which creates a link object, uses it to do the download, then destroys it.
The value of this. I am using this to download attachments, so I know the id, contentType and filename: I am using an MVC api to return the file:. Inside downloadFile data function we need to make block, link, href and file name. I added in the file-saver as Hector Cuevas named in his answer. Using Angular2 v. The journal reducer Though this only sets the correct states used in our application I still wanted to add it in to show the complete pattern.
On the component part, you call the service without subscribing to a response. The solution is referenced from - here. I found the answers so far lacking insight as well as warnings. This is the complete example with the application part and service part after.
Note that we set the observe: "response" to catch the header for the filename. Also note that the Content-Disposition header has to be set and exposed by the server, otherwise the current Angular HttpClient will not pass it on. I added a dotnet core piece of code for that below. I got a solution for downloading from angular 2 without getting corrupt, using spring mvc and angular 2. Here I am sending byte[] array has return type from the controller.
This will give you xls file format. If you want other formats change the mediatype and file name with right extension. I was facing this same case today, I had to download a pdf file as an attachment the file shouldn't be rendered in the browser, but downloaded instead.
To achieve that I discovered I had to get the file in an Angular Blob , and, at the same time, add a Content-Disposition header in the response.
Well, I wrote a piece of code inspired by many of the above answers that should easily work in most scenarios where the server sends a file with a content disposition header, without any third-party installations, except rxjs and angular. As you can see, it's basically pretty much the average backend call from angular, with two changes.
Once the file is fetched from the server, I am in principle, delegating the entire task of saving the file to the helper function, which I keep in a separate file, and import into whichever component I need to.
There, no more cryptic GUID filenames! We can use whatever name the server provides, without having to specify it explicitly in the client, or, overwrite the filename provided by the server as in this example.
Also, one can easily, if need be, change the algorithm of extracting the filename from the content-disposition to suit their needs, and everything else will stay unaffected - in case of an error during such extraction, it will just pass 'null' as the filename. As another answer already pointed out, IE needs some special treatment, as always. But with chromium edge coming in a few months, I wouldn't worry about that while building new apps hopefully.
There is also the matter of revoking the URL, but I'm kinda not-so-sure about that, so if someone could help out with that in the comments, that would be awesome. You may also download a file directly from your template where you use download attribute and to [attr. This simple solution should work on most browsers. This answer suggests that you cannot download files directly with AJAX, primarily for security reasons. So I'll describe what I do in this situation,. Add href attribute in your anchor tag inside the component.
Do all following steps in your component. If a tab opens and closes without downloading anything, i tried following with mock anchor link and it worked. You can return a Blob object from the server and create an anchor tag and set the href property to an object URL created from the Blob. Now clicking on the anchor will download the file. You can set the file name as well.
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Active 1 month ago. Viewed k times. Improve this answer. Sagar Desai Sagar Desai 1 1 gold badge 3 3 silver badges 11 11 bronze badges. Make the download via angularJS is not a good way. But, it is working fine for interpolation not for second one. I can't find link for download url via angularjs. Please provide it. Show 8 more comments. Sign up or log in Sign up using Google. Sign up using Facebook.
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