Angular |TOP| Download Progress

<div>Upgraded to Angular 6. Now I want to turn progress display off globally for ng build. However, the documentation about the ng config command which apparently replaced ng set/get seems to be missing or out-of-date. I think I need to do the following:</div><div></div><div></div><div></div><div></div><div></div><div>angular download progress</div><div></div><div>Download File: https://t.co/H12rvfGEyw </div><div></div><div></div><div>Hi,</div><div></div><div>Right now Bryntum gantt automatically calculates the progress of histogram based on line item start and end date.I am getting progress data from backend(server), gantt histogram should consider that progress, it shouldn't automatically calculate. Is there any way we can achieve this functionality? Please find the attached image, as you can see blue progress line that i want to bind with backed data.</div><div></div><div></div><div>Downloading files is a common task for web applications. These files could be some PDF, ZIP or any other binary or text-based file that you want to make accessible to your users. Here's how you can download files in Angular either with a rather simple link or JavaScript-based for more control and progress indication.</div><div></div><div></div><div>A link-based solution conforms well to HTML standards and lets the browser do most of the work. However, if you want more control over the download and would like to display some custom progress indicator you can also download files via Angular's HttpClient.</div><div></div><div></div><div>Since we don't just want to forward these events to every component, our service has to do some more work. Otherwise our component would have to deal with HTTP specifics - that's what services are for! Instead let's introduce a data structure representing a download with progress:</div><div></div><div></div><div></div><div></div><div>A Download can be in one of three states. Either it hasn't started yet, therefore it's pending. Otherwise it's done or still in progress. We use TypeScript's union types to define the different download states. Additionally, a download has a number indicating the download progress from 1 to 100. Once a download is done, it will contain a Blob as its content - until then this property is not available, therefore null.</div><div></div><div></div><div></div><div></div><div></div><div></div><div>Based on these guards we can now create our custom operator. It'll leverage scan, an operator that allows us to accumulate state for successive values coming through an observable. It takes up to two arguments: First, we provide an accumulator function which will compute the next Download state from the previous one and the current HttpEvent. Second, we'll pass a seed to scan representing the initial Download state. This seed will represent our download being pending without any progress or content:</div><div></div><div></div><div></div><div></div><div>When we encounter a HttpProgressEvent, we calculate the progress based on the number of bytes already loaded and the total bytes. A download is done when we receive a HttpResponse containing the file contents in its body. When receiving any other events than HttpProgressEvent or HttpResponse, we won't alter the download's state and return it as it is. This way, for example, we can keep the information in the progress property while other events that won't allow us to compute the progress can be ignored for now.</div><div></div><div></div><div>We can then subscribe to this observable through the AsyncPipe in combination with NgIf. While the download is pending we'll display the progress bar in 'buffer' mode (you may also use 'query'), otherwise the progress is determinate. The bar's value can then easily be applied from Download.</div><div></div><div></div><div></div><div></div><div>I need to call a ServiceStack service from an HTML/CSS/Javascript app (leveraging Angular) and POST a Request DTO while uploading a file at the same time (similar to what is achieved by PostFileWithRequest in the C# client). While the upload is busy I need to report back to the UI using a progress bar. Is there an example of this that I can follow somewhere?</div><div></div><div></div><div>We don't have any example since it's a specific use case you need, not common requirement. But as  ismcagdas mentioned, you may connect to the server via signalr and send the current progress of the excel file to the client from server. And show a progress bar in client's ui. It is one of the possible solutions.</div><div></div><div></div><div>In order to calculate the upload progress we need to pass the reportProgress and observe options for our HTTP request while setting them to true and event respectively. This way, the HttpClient returns and RxJS observable containing an HttpEvent for each step in the upload request. By setting reportProgress to true this will also include events of type HttpProgressEvent which provide information about the number of uploaded bytes as well as the total number of bytes in the file.</div><div></div><div></div><div>It has a progress property ranging from 0 to 100 and state property that tells us whether the underlying request is pending, currently in progress or done. Our initial state will start out accordingly:</div><div></div><div></div><div>We can use the Observable returned from the service in our component to display a progress bar. Simply assign the upload states to an instance property from inside the subscription callback (or use the AsyncPipe with NgIf):</div><div></div><div></div><div>I experimented a little bit with SVG (Scalable Vector Graphics) after reading Practical SVG by Chris Coyier; but, I haven't really used it since - most of my work has been back-end focused. As such, when I saw Twitter add a little progress indicator in its TweetDeck input form, I thought that it would make a fun widget to try and recreate in Angular 5.0.1.</div><div></div><div></div><div>The TweetDeck textarea progress indicator appears to be composed of two overlapping circles. The bottom circle draws the gutter of the indicator and the top circle draws the partial-path that indicates the percentage of available characters used in the tweet:</div><div></div><div></div><div>In SVG, we can easily create two overlapping circles with the element. But, we can't really draw a "partial circle" for the progress without creating a more complex "path" object (at least I can't). Instead, we'll use the dashed-stroke technique popularized by Jake Archibald in Animated line drawing in SVG.</div><div></div><div></div><div>When using the aforementioned technique, the progress path of the TweetDeck indicator becomes the first dash in a dashed-stroke and the first space in the dashed-stroke is then made sufficiently large to hide any second dash from being rendered. As the progress increases, we simply increase the size of the first dash to take up the appropriate portion of the circle diameter.</div><div></div><div></div><div>Often when building an application with visualizations, we reach for a third party library. Many of these libraries are great for display charts and graphs with a rich feature set. Sometimes though we need something lightweight and don't want to pull in another dependency to our Angular app. In this post, we are going to look at creating a progress visualization component and see how easy it is to do this with Angular and SVG.</div><div></div><div></div><div>Out SVG consists of two circles. One circle will be the outer grey while the other will be the progress value that will be updated by Angular. If we look at our SVG, the first thing we do is bind the circumference value to each circle.</div><div></div><div>The circumference value will be set in the component class. Notice that we can use Angular's property binding syntax [] to set properties and attributes of our SVG.</div><div></div><div></div><div>Looking at the second circle, we bind two style properties, strokeDasharray and strokeDashoffset. Using these style properties, we can calculate the progress value in our component and Angular will automatically update the styles to reflect the changes.</div><div></div><div></div><div>To calculate the strokeDashoffset, we create a method called progress(). The progress() method takes in a value 0 - 100 and then computes the</div><div></div><div>appropriate offset value to set to the dashoffset property. In our constructor, we initialize this value to 0. If we looked at our component, currently we wouldn't see any progress value. We ideally want to be able to pass the progress value into this component so that other components can use it efficiently.</div><div></div><div></div><div>Adding the  Input() value property is not enough. We now need to implement the ngOnChanges life cycle hook. The ngOnChanges will notify us whenever an input property changes, allowing us to efficiently trigger when the progress() method should be called to recalculate our dashoffset.</div><div></div><div></div><div>Following this guideline sample-blob.html I want to track upload progress by getting the progress value to the DOM. I also want to print, say, 'done' in the DOM when the upload is finished. Is there a way to "subscribe" to SpeedSummary so I can get its progress value? Any other more recommended approach?</div><div></div><div></div><div>Note: I am aware of this implementation upload-to-azure-blob-storage-with-angular-7977e979496a but it gives me an error when implementing the uploadFile function. But more importantly I am looking for something more straigthforward to implement.</div><div></div><div> df19127ead</div>