Replace blob file in browser?
I've asked this before, but someone voted and accused me of trying to write files to the local filesystem without reading.
I have a website in a corporate environment that will only ever be accessed in chrome, so keep that in mind.
I can select a local folder on my PC and open all subfolders and files in the browser. I am using client side javascript to parse these files and look for a specific kind of XML file that is used internally to render PowerPoint as a presentation. I can make changes to this xml file and spit it back out as a blob.
What I would like to do but do not know how to replace the data or blob in the original file with the changed data / blob.
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Can the user interact with the data block? If so, you can use the save file function and overwrite the original.
function saveFile( data )
{
var textFileAsBlob = new Blob([yourData], {type:'text/plain'});
//or replace the code above with your already formed blob
var fileNameToSaveAs = "File_Name_Goes_Here.xml";
var downloadLink = document.createElement("a");
downloadLink.download = fileNameToSaveAs;
//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.
try {
downloadLink.href = window.URL.createObjectURL(textFileAsBlob);
downloadLink.onclick = destroyClickedElement;
downloadLink.style.display = "none";
document.body.appendChild(downloadLink);
}
catch( e ){
console.log("error saving firefox file")
}
// IE 10+
try {
window.navigator.msSaveBlob(textFileAsBlob, fileNameToSaveAs);
}
catch(e){
console.log("error saving IE file")
}
}
try {
downloadLink.click();
}
catch(e) {
console.log("Unable to click the download link. Are you using IE?")
}
}
I grabbed this code from elsewhere on Stack Overflow. I can't remember who it is because of this to provide attribution :-(
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