Question

我想将javascript中生成的数据移动到文件

我正在使用

    function saveTextAsFile(textToWrite,FileName){
    var textFileAsBlob = new Blob([textToWrite], {type:'text/plain'});
    var downloadLink = document.createElement("a");
    downloadLink.download = FileName;
    downloadLink.innerHTML = "Download File";
    if (window.webkitURL != null){
        // Chrome allows the link to be clicked
        // without actually adding it to the DOM.
        downloadLink.href = window.webkitURL.createObjectURL(textFileAsBlob);
    }
    else{
        // Firefox requires the link to be added to the DOM
        // before it can be clicked.        
        downloadLink.href = window.URL.createObjectURL(textFileAsBlob);
        downloadLink.style.display = "none";
        document.body.appendChild(downloadLink);        
    }
    downloadLink.click();
    }

基于来自的代码 Is it possible to write data to file using only JavaScript?

问题是在ascii值高于0x79的每个字符之前插入0xc2。

000041e0  30 35 5d 22 57 69 72 65  6c 65 73 73 22 3d 30 0a  |05]"Wireless"=0.|
000041f0  00 00 c2 b0 c2 a0 c2 80  7f                       |.........|
000041f9

这发生在firefox＆amp; Ubuntu Linux中的chrome浏览器。我希望除了'text / plain'之外的其他一些blob类型不会有这种行为，但是我找不到相关的文档。

达斯汀苏达克

注意：这是一种新的问题解决方法 Can you make a textarea which doesn't automatically edit your text? 这似乎是不可能的

Answer 1

我在我的谷歌搜索中添加了'application / octet-binary'并找到了答案 “Create binary blob in JS”。看起来如果从Uint8Array而不是字符串初始化blob，它就不再改变数据。以下是完整的工作代码：

    function saveTextAsFile(textToWrite,FileName){
       function destroyClickedElement(event){
            document.body.removeChild(event.target);
        }
        var byteArray = new Uint8Array(textToWrite.length);
        for (var i=0;i<byteArray.length;i++){
            byteArray[i]=textToWrite.charCodeAt(i);
        }
        var textFileAsBlob = new Blob([byteArray], {type:'application/octet-binary'});
        var downloadLink = document.createElement("a");
        downloadLink.download = FileName;
        downloadLink.innerHTML = "Download File";
        if (window.webkitURL != null){
            // Chrome allows the link to be clicked
            // without actually adding it to the DOM.
            downloadLink.href = window.webkitURL.createObjectURL(textFileAsBlob);
        }
        else{
            // Firefox requires the link to be added to the DOM
            // before it can be clicked.        
            downloadLink.href = window.URL.createObjectURL(textFileAsBlob);
            downloadLink.onclick = destroyClickedElement;   
            downloadLink.style.display = "none";
            document.body.appendChild(downloadLink);        
        }
        downloadLink.click();
    }

保存文件时保持javascript blob不被编辑数据

1 个答案: