ebooks | basic ebooks web application to browse your collection

I have a Flutter project in which I am:

• Downloading the zip file (full of html files)
• Extracting the html files to a new directory (ebooks/02)
• Saving the local file urls in a List
• Displaying the urls in Webview & iterate through List for back & forth.

However, in the web view all I get is "Unable to load asset..."

Though any standard http url works fine in webview.

I tried from these two answers but no result: Answer1 & Answer2

The exception I get is :

E/flutter (10963): [ERROR:flutter/lib/ui/ui_dart_state.cc(186)] Unhandled Exception: Unable to load asset: /data/user/0/com.pts.school_ebook_reader_app_prag/app_flutter/ebooks/04/00.html

I need to understand how to make the local html at the given path display in webview.

Any help would be appreciated.

Edit:

The webview code (currently trying to display only 1st url in list):

I am adding sections to our website and all but one of them are working the way I want: i.e. no margin between sections.

I'm not able to get this one page's sections to have no margin between sections; they have extra space beneath. I have went over the code with a fine tooth comb and cannot find the error.

I am first including the code of a sample page that works correctly:

I'm working on a marketplace. My back end upload many ebooks, previews and screenshots in a private S3.

When i login in the user dashboard, the back end send me metadata about ebook i uploaded. In the ebook, I have for example the screenshot url. When I want to display the screenshot using the url, I have access denied.

Another part of the dashboard is public, so i can display all ebooks cover like amazon for example, so we will have many access.

How could i use aws sdk or another methods to display screenshots, covers, using urls sent by the back end ? How could I tell s3 to allow the my angular front end to access files in the s3 ?

PS: I can't use presigned url, because we will have have million of access in production per day.

My django api responds with the username if the user is authenticated and a not authenticated details msg if not authenticated but i am unable to read the status code or console log or catch the 401 status code and res.status gives undefined msg console img

how can i use http status to render depending on the code received .

Could someone please help me figure out where I went wrong with this very basic code I wrote this morning? Trying to write a calculator for the quadratic formula question on Python 3 but I get an error saying "NameError: name 'sqrt' is not defined". It sort of makes sense, but then I do not know how else to put the square root in there. Is there some other function I should be using?

PS: I learn on my own off youtube and ebooks. So if you could please explain to me like I'm five, that would be awesome, thanks. I just started learning a couple days ago.

So I'm attempting to create an adaptive Huffman encoding algorithm and I've run into a bit of a roadblock that I'm not sure how to resolve.

My algorithm works completely as intended, except for with one minor issue; I can't seem to figure out how to ensure extra characters aren't written when the compression result doesn't have exactly 8 bits for every byte.

As an example; here's the ending fragment of my input text

I am trying to write an application where it will go to amazon and get a list of books on the page. I am using Playwright as the tool. I can get to the right section but I can't get the list of books. Looking online the examples seem to use page.$$(selector) but when I try that, I get an empty array back. Found this information here and here. Reading the docs on $$, this seems like the right call as all the list elements have the same class name. I have no idea what I am doing wrong, any advice on this?

Here is my code so far;

This is table t_contents_2021 on database MySql version 8.0.17

I'm trying to implement this enum into my program so that it will return the String equivalent of the enum value. So for example, if the value of dept = 3, then it will return Printed Books & eBooks.

This is what I have so far and it doesn't seem to work because when I go to my program tester class and I try to add a new OrderItem it says that the constructor is undefined once I enter an integer from 0-5 for the Department part of the constructor.

Does anyone have any ideas about what I am doing wrong?

The enum