blob

问题 We have an angular application on client side. I want to offload my report file preparation from server to client. We create CSV file on server which can be around 300MB and give link for download from client browser. Now I want to receive these data from server into my angular application some 5K rows at a time and keep writing the content in stream fashion into client file system. The angular application should not holddata and write one shot. 来源： https://stackoverflow.com/questions

问题 We have an angular application on client side. I want to offload my report file preparation from server to client. We create CSV file on server which can be around 300MB and give link for download from client browser. Now I want to receive these data from server into my angular application some 5K rows at a time and keep writing the content in stream fashion into client file system. The angular application should not holddata and write one shot. 来源： https://stackoverflow.com/questions

问题 I'm using blob to download files, Problem is I want to keep Object URL even after downloading the file, without making major changes in code base. So one of the option is not to call URL.revokeObjectURL(); Is it safe to depend on browser's garbage collector to avoid any memory leak? Do I always need to call URL.revokeObjectURL(); explicitly ? 回答1: Is it safe to depend on browser's garbage collector to avoid any memory leak? What createObjectURL approximately¹ does is to create a mapping of

问题 After much of googling I have come to three conclusion that until MVC 4 ( entity framework), that FILESTREAM (of Sql server) is not supported directly. Is there a work around for the same? 回答1: Unfortunatelly, there is no equivalent of FILESTREAM in EF 6, that could be used with Code First approach. There is a workaround I found today, but haven't tried myself yet, though: http://ignoringthevoices.blogspot.co.uk/2014/01/working-with-entity-framework-code.html Basicaly, you need to use

问题 i created a SPRING BOOT service which can store different type of files. when i tried to consume this service into ANGULAR , the images works as well but when i try to display the pdf files with ng-pdf-viewer it doesn't work for me. my component.ts: export class AppComponent { constructor(private httpClient: HttpClient) {} tag: string; selectedFile: File; retrievedFile: any; base64Data: any; retrieveResonse: any; message: string; UserTag: any; //Gets called when the user selects a file public

问题 i created a SPRING BOOT service which can store different type of files. when i tried to consume this service into ANGULAR , the images works as well but when i try to display the pdf files with ng-pdf-viewer it doesn't work for me. my component.ts: export class AppComponent { constructor(private httpClient: HttpClient) {} tag: string; selectedFile: File; retrievedFile: any; base64Data: any; retrieveResonse: any; message: string; UserTag: any; //Gets called when the user selects a file public

问题 I need a little help with NodeJS and MySQL blob insertion. Here's the code snippet i'm using fs.open(temp_path, 'r', function (status, fd) { if (status) { console.log(status.message); return; } var buffer = new Buffer(getFilesizeInBytes(temp_path)); fs.read(fd, buffer, 0, 100, 0, function (err, num) { var query ="INSERT INTO `files` (`file_type`, `file_size`, `file`) VALUES ('img', " + getFilesizeInBytes(temp_path) + ",'" + buffer + "' );"; mySQLconnection.query(query, function (er, da) { if

问题 I am trying to implement Azure Put Blob in Salesforce APEX but getting following error. I have read almost all Microsoft documentation and tried many way but in the end stuck in same point. I would like someone to have a look please. Error <?xml version="1.0" encoding="utf-8"?> <Error> <Code>AuthenticationFailed</Code> <Message>Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature. RequestId:e41a64e6-301e-0047-5cbd

问题 steps that will reproduce the problem : I am recording a video using camera of my device using recordRTC and save and download the recorded video. After downloading the recorded video, I can only hear the audio but cannot see the video in my ipad/windows 10 machine . (Suspecting that webm video format is not supported.) initMediaRecorder(mediaStream: MediaStream) { this.mediaRecorder = new window['MediaRecorder'](mediaStream, mimeType: 'video/webm'); const recordedChunks = []; // zone.js

问题 I use Filereader to read local video file (mp4), so I can display it in video tag. I need to cut part of mp4 file (i.e. from 5 to 10 seconds) and upload it on server. My current solution: I upload whole video file on server with "from" and "to" parameters, cut it with ffmpeg on server, upload to s3 and return the url video. Maybe is it possible only with JS/HTML? I found Blob.slice method but i didn't know how to use it to cut video parts. Thanks! 回答1: An mp4 video file is made up of 'atoms'