使用CefSharp和SchemeHandler如何创建Javascript File（） [英] Using CefSharp and a SchemeHandler how to create a Javascript File()

问题描述

在我要借助Cefsharp自动化的网站上，我需要提供一个JavaScript File.File（）。我要提供的文件已本地保存，可以是pdf，office文档或图像等任何文件。就CefSharp而言，我已经实现了ISchemeHandlerFactory和ResourceHandler添加了test：//方案，例如，我已经成功添加了这样的JS文件。

On a website I am automating with the help of Cefsharp I have the need to provide a javascript File.File(). The file I want to give it is locally saved and could be anything from pdfs to office documents or images. As far as CefSharp is concerned I have implemented a ISchemeHandlerFactory and ResourceHandler adding a test:// scheme and for example I have successfully added a JS file like this.

var head = document.head;
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = 'test://local/folder/mytest.js';
head.appendChild(script);

根据API创建我需要的文件

According to the API to create a file I need

位-ArrayBuffer，ArrayBufferView，Blob或DOMString对象的数组-或任何此类对象的混合。这是编码为UTF-8的文件内容。

bits - An Array of ArrayBuffer, ArrayBufferView, Blob, or DOMString objects — or a mix of any such objects. This is the file content encoded as UTF-8.

所以我有test：//的方案，可以给我一个本地文件我需要在javascript中使用什么才能将其保存到文件中？

So I have my scheme of test:// to give me a local file what do I need to use in javascript to get this into a file?

推荐答案

我工作了。我首先尝试了访存，但是这不允许我使用自定义方案。所以我不得不使用XMLHttpRequest

I worked it. I first tried a fetch but that would not let me use a custom scheme. So I had to use XMLHttpRequest

(function loadDoc() {
    var xhttp = new XMLHttpRequest();
    xhttp.onreadystatechange = function() {
       if (this.readyState == 4 && this.status == 200) {
            var contentType = xhttp.getResponseHeader("Content-Type");
            var file = new File([this.response],'3Markets.xlsx', {type: contentType,});
            //use my new file etc
      }
   };
xhttp.open('GET', 'test://local/folder/3Markets.xlsx', true);
xhttp.responseType = "arraybuffer";
xhttp.send(); 
})()

我唯一的问题或担心是我目前必须致电

The only issue or worry i have is I currently have to call

CefCommandLineArgs.Add("disable-web-security", "disable-web-security")

我将不得不看看如何在不禁用网络安全的情况下实现此目标，或者最终询问在这里提问。

which i will have to have a look around how I can achieve this without disabling web security or eventually ask a question here.

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