blob

1 async downloadFun() { // 下载使用说明书 2 const InstructionManualvv = await InstructionManual(); 3 4 let blob = new Blob([InstructionManualvv.data], {type: 'application/pdf;charset=UTF-8'}); 5 let fileName = '使用说明书.pdf'; 6 if (window.navigator.msSaveOrOpenBlob) { 7 navigator.msSaveBlob(blob, fileName) 8 } else { 9 var link = document.createElement('a'); 10 link.href = window.URL.createObjectURL(blob); 11 link.download = fileName; 12 link.click(); 13 window.URL.revokeObjectURL(link.href) //释放内存 14 } 15 }, 来源： https://www.cnblogs.com/xiaozhu-zhu/p/11984864.html

I have a BLOB URL, and I want to recreate it as a second BLOB URL, so that it is downloaded by default. var blob1 = new Blob(["Hello world!"], { type: "text/plain" }); url1 = window.URL.createObjectURL(blob1); blob2=new Blob([url1], {type: 'application/octet-stream'}); url2 = window.URL.createObjectURL(blob2); var a = document.createElement("a"); document.body.appendChild(a); a.style = "display: none"; a.href = url2; a.click(); window.URL.revokeObjectURL(url); See in JSFiddle: https://jsfiddle.net/7spry3jn/ But this only creates a text file containint the first URL. How can I Read data from

I'm pulling a JSON request of 20 random thumbnails to an iPhone application. At the moment I'm simply including the image thumb URLs in the JSON array (see below), then the iPhone goes out to get each image. This is really slow. Original JSON Request: { "item_list": [ { "item_name": "Item One", "user_item_thumb": "http://localhost:8080/i/agpwaGluZ28tYXBwcg4LEghJdGVtVXNlchgPDA/67x67", }, { "item_name": "Item Two", "user_item_thumb": "http://localhost:8080/i/agpwaGluZ28tYXBwcg4LEghJdGVtVXNlchgQDA/67x67", }, { "item_name": "Item Three", "user_item_thumb": "http://localhost:8080/i

I've a jsp page which loads many images. I'd like to cache the images for faster loading. I'll explain my idea, please correct it if it's wrong. I'm calling the picture loading servlet for each image and return as a BLOB. My idea is to add a modified date with the image and the other values like Last-Modified, expires, Cache-control and max age. And thereby make the browser understand if the image changes. But how can i append a modified date to a BLOB? Or is there some better ideas to make them cachable? Thanks... I've a jsp page which loads many images. I'd like to cache the images for

How to detect Non Moving Blobs from a video? Let's consider I have a video and a initial background frame bitmap. Is that possible to detect an blob/object which is NOT MOVING ? and draw a rectangle around that Object? This reminds me of an algorithm to detect forgotten objects on a subway. If I'm not wrong you want to detect objects that are not moving AND that were not on the initial background right? You can apply this approach: With an initial image like this (couldn't find a truly empty subway image): And an image with an added static object (the waste can), the subway moving, and a

After using the ImagesService to transform an uploaded image, I would like to store it back into a new Blob file and make it available through getServingUrl() as provided by the ImagesService. Storing the image in a new AppEngineFile as described here works fine and I am able to open and view it locally using the dev server. However when passing the blobKey for the new AppEngineFile to ImagesService.getServingUrl() a java.lang.IllegalArgumentException: Could not read blob. exception is thrown. Any ideas what the problem could be? This is the code I use to transform and store an uploaded image

1、需要安装file-saver和script-loader、xlsx 　　 npm install file-saver / yarn add file-saver npm install script-loader / yarn add script-loader npm install xlsx / yarn add xlsx 　　 2、新建js文件（Blob.js和Export2Excel.js） Blob.js /* eslint-disable */ /* Blob.js*/ /*global self, unescape */ /*! @source http://purl.eligrey.com/github/Blob.js/blob/master/Blob.js */ (function (view) { "use strict"; view.URL = view.URL || view.webkitURL; if (view.Blob && view.URL) { try { new Blob; return; } catch (e) { } } // Internally we use a BlobBuilder implementation to base Blob off of // in order to support older browsers