在Chrome浏览器中下载大文件（最大15 MB）时出现问题

本文介绍了在Chrome浏览器中下载大文件（最大15 MB）时出现问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 我在Google Chrome中遇到下载问题。 我使用的是Ruby 2.2，Rails 4.2，AngularJS 1.2。I have a downloading problem in Google Chrome.I am using Ruby 2.2, Rails 4.2, AngularJS 1.2.这里没有数据库。我们通过API获得的一切。我们正在尝试下载的文件大约是7 MB。它给了我们失败：网络错误。虽然它在Firefox上运行良好。We dont have a database here. Everything we are getting through API. The file which we are trying to download is around 7 mb. It gives us "Failed: Network Error". Though it works fine on Firefox.在API中，我们使用JSON获取二进制数据。我们正在解析它。然后： From the API we are getting binary data in JSON. We are parsing it. And then: send_data response_fields["attachment"], type: response_fields["mimeType"], disposition: 'attachment', filename: params[:filename]当我们使用AngularJS时，我们正在捕获AngularJS Controller然后将其转换为：As we are using AngularJS, we are catching that value in AngularJS Controller and then converting it as: var str = data;var uri = "data:" + mimeType + ";base64," + str;var downloadLink = document.createElement("a");downloadLink.href = uri;downloadLink.download = filename;document.body.appendChild(downloadLink);downloadLink.click();document.body.removeChild(downloadLink);这适用于Firefox&即使Chrome浏览器的文件较小。不知道为什么它在Chrome上给出更大尺寸的错误。This works in Firefox & even Chrome for smaller file size. Not sure why it is giving error for bigger size on Chrome.有什么建议吗？ p> 推荐答案这些问题几乎是重复的 1 和 2 ，但由于它们特别处理canvas元素，所以我会在这里重写更全面的解决方案。This is an almost duplicate of these questions 1 and 2, but since they do deal particularly with the canvas element, I'll rewrite a more global solution here.这个问题是由于chrome在锚点（< a> ） download 属性。我不太确定他们为什么这么做，但解决方案非常简单。 This problem is due to a size limit chrome has set in the anchor (<a>) download attribute. I'm not quite sure why they did it, but the solution is pretty easy. 将您的dataURI转换为 Blob ，然后创建一个 ObjectURL ，并将此ObjectURL作为锚点的下载属性传递。Convert your dataURI to a Blob, then create an ObjectURL from this Blob, and pass this ObjectURL as the anchor's download attribute. // edited from https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/toBlob#Polyfillfunction dataURIToBlob(dataURI) { var binStr = atob(dataURI.split(',')[1]), len = binStr.length, arr = new Uint8Array(len), mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0] for (var i = 0; i < len; i++) { arr[i] = binStr.charCodeAt(i); } return new Blob([arr], { type: mimeString });}var dataURI_DL = function() { var dataURI = this.result; var blob = dataURIToBlob(dataURI); var url = URL.createObjectURL(blob); var blobAnchor = document.getElementById('blob'); var dataURIAnchor = document.getElementById('dataURI'); blobAnchor.download = dataURIAnchor.download = 'yourFile.mp4'; blobAnchor.href = url; dataURIAnchor.href = dataURI; stat_.textContent = ''; blobAnchor.onclick = function() { requestAnimationFrame(function() { URL.revokeObjectURL(url); }) };};// That may seem stupid, but for the sake of the example, we'll first convert a blob to a dataURI...var start = function() { stat_.textContent = 'Please wait while loading...'; var xhr = new XMLHttpRequest(); xhr.responseType = 'blob'; xhr.onload = function() { status.textContent = 'converting'; var fr = new FileReader(); fr.onload = dataURI_DL; fr.readAsDataURL(this.response); }; xhr.open('GET', 'https://dl.dropboxusercontent.com/s/bch2j17v6ny4ako/movie720p.mp4?dl=0'); xhr.send(); confirm_btn.parentNode.removeChild(confirm_btn);};confirm_btn.onclick = start; <button id="confirm_btn">Start the loading of this 45Mb video</button><span id="stat_"></span><br><a id="blob">blob</a><a id="dataURI">dataURI</a> 以及FF的 jsfiddle版本， t允许stack-snippets中的下载属性... And a jsfiddle version for FF, since they don't allow the downloadattribute from stack-snippets... 这篇关于在Chrome浏览器中下载大文件（最大15 MB）时出现问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！