file reader read blob file
i am trying to use filereader to access a blob file located locally, such as c drive, then converts it back to object URL as img src. it is not working, can anyone help this?never found anyone try to...
View ArticleTypeError: Failed to execute 'readAsText' on 'FileReader': parameter 1 is not...
I'm writing an chrome application with scala.js, and have some file reading problem.When I use chrome.fileSystem.chooseEntry with openDirectory to select a directory, I want to read the _meta_.json...
View ArticleHTML5 Filereader always returns empty string?
I'm just learning how to use the filereader now, and I duplicated an example I found online to experiment with, but for some reason, the filereader always returns an empty string.First, I have an HTML...
View ArticleHow to parse Excel (XLS) file in Javascript/HTML5
I am able to read Excel file via FileReader but it outputs text as well as weird characters with it. I need to read xls file row-wise, read data in every column and convert it to JSON. How to read xls...
View ArticleRead a file synchronously in JavaScript
I would like to read a file and convert it into a base64 encoded string using the FileReader object. Here's the code I use:var reader = new FileReader();reader.onloadend = function(evt) { // file is...
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Empty result using FileReader and promise
I am struggling a bit with asynchronous operations and Promises (a quite new concept to me) using FileReader. I have found a very interesting thread about it there, but can't make my script to work...
View ArticleIs there a way to attach MOV videos to a webpage using FileReader?
I'm making a web app that a user can drag and drop images and videos into.I've figured out how to attach images and mp4 videos, but I can't seem to attach MOV videos (the main video type I want to...
View ArticleUsing FileReader with React and Typescript
I want to upload json file using input with type file. When I use onload method on fileReder Typescript shows me error - Cannot invoke an object which is possibly 'null'.Thank you.const UploadCharacter...
View ArticleFileReader returns garbage after a certain number of files in mobile safari
Been really stumped by this problem. I've searched the web and haven't found traces of info on it, but I believe it is a widespread issue.See the HTML in this post. If I select more than 350 (the...
View ArticleHow to get a line of text in a ifstream file with another line of text?
I have a txt file that has page number data for 3 books. I am making a program to quickly change that data for a website. Here is my txt file:0 31 572 173The 0,1,2 is the book index's I would like to...
View ArticleTrouble uploading binary files using JavaScript FileReader API
New to javascript, having trouble figuring this out, help!I am trying to use the Javascript FileReader API to read files to upload to a server. So far, it works great for text files. When I try to...
View ArticleHow to display a image selected from input type = file in reactJS
I'm trying to display a image selected from my computer in my web app. I referred the following question which addresses the question i'm trying to fix. How to display selected image without sending...
View ArticleIssue with Previewing Multiple Images After Upload in React
I'm working on a React component that allows users to edit a product and upload images. While I'm able to set and preview a single image correctly, I'm having trouble with previewing multiple images....
View ArticleFailed to execute 'readAsText' on 'FileReader': parameter 1 is not of type...
I am trying to read a user uploaded xml file in angular. Below is my code:Component.ts:convertFileToString(event){ this.uploadXML=event.target.files[0]; let fileReader = new FileReader();...
View ArticleHow to read file without file input?
I'm developing an application in Javascript, which requires to read a text file and put it into a variable as input. However, I google many related questions and found that FileReader can't read file...
View ArticleJest Test: Getting Undefined for Component State After Mocking FileReader
I'm currently writing unit tests for an Angular component that processes a JSON file upload. In my test, I'm trying to mock the FileReader to simulate reading a JSON file, but I'm getting undefined for...
View Articlesending audio file to open ai whisper model
I am converting my recorded audio file to a blob object and then reading it with file reader to make a post request to open ai whisper modelIt expects a audio file and model name i.e whisper-1The error...
View Articlejava reading a line of specific length and position from a txt fie
I am trying to create segments of data from a text file to transfer over a network to another device however my reader is not working.It will read the chunk, send it and update the counter value...
View ArticleHow to implement Progress Bar and Callbacks with async nature of the FileReader
I have the FileReader API called within a for loop to iterate through multiple file objects. I'm using FileReader to essentially display preview of images.function() { for (var i in Files) { var...
View ArticleCreating a FileReader which way is better for optimisation?
From an optimization stand point, is it better to declare the File separately like thisFile f = new File("sample.txt");FileReader fr = new FileReader(f);or, is it better to do it inline like...
View ArticleError While Skipping the Line in OpenCsv Java
public Map<String, List> readCsv( MultipartFile customerCsvMultipartFile, int chunkSize, int lastOffSet, boolean markReadingCsvProcessComplete ) throws IOException { List<CustomerCsvDto>...
View ArticleReading CSV File without manupulating encoding
I have a csv file that I can see with :file -bi myCsv.txtthat the character-set is iso-8859-1.Now I want to read this file using JavaScript from input tag and type 'file' without manipulating the...
View ArticleProblem on Nand2tetris Jack to a syntax tree
i have done some project of Nand2tetris for my class and i have huge probleme on the 10 , it's about the reader i think after the evaluation of the 3 first token it's say that the next token is None...
View ArticleSpecify the type returned from FileReader readAsDataURL() as PNG and not TIFF?
I'm getting an image that has been pasted into the content editable div and during paste the types in listed in the Clipboard include "image/png" and "image/tiff". When I get that image using a...
View ArticleCan't find variable: FileReader in Safari
i uses html5 upload try{ var reader = new FileReader(); reader.onerror = function(e) { }; reader.onload = function(e) { }; reader.readAsText(file); }catch(e){ }but in safai when i upload a .torrent...
View ArticleJavaScript FileReader Slice Performance
I am trying to access the first few lines of text files using the FileApi in JavaScript.In order to do so, I slice an arbitrary number of bytes from the beginning of the file and hand the blob over to...
View ArticleParse CSV records in to an array of objects in JavaScript
I'm new to JS and not much exp in Regex to play with string manipulation. Here is my CSV file with records in tabular form with the first line as headers and from on next line the values will be...
View ArticleFileReader.readAsArrayBuffer handling of non-ASCII including £ (pound sterling)
I am using FileReader.readAsArrayBuffer(file) and converting the result into a Uint8Array.If the text file input contains a pound sterling sign (£), then this single character results in two byte...
View ArticleJavascript Promises with FileReader()
I have the following HTML Code:<input type='file' multiple>And Here's my JS Code:var inputFiles = document.getElementsByTagName("input")[0];inputFiles.onchange = function(){ var fr = new...
View ArticleConvert Blob to image url and use in image src to display image
How to convert blob to base64/image? I am getting this blob through API call and I am trying to display it in a image. I have tried with stackoverflow answers but nothing could help so I just tried...
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