Can I download file from URL link generated by google apps script

问题

Please help I'm learning google-apps-script for short time. I want to download file from remote site by url generating from data that stores in my spreadsheet.

for example, i have 2 paremeters:

Cell1 = val1, val2, ... valN
Cell2 = val21, val22, ...  val2N

I split string from cell data to Arrays and than generate URL. for example: http://mysite.com/files/file.val1.val22.zip Than i need to download file from this link...

Can I do this process automaticaly ?

回答1:

This example function will retrieve your zip file, and place it into your Google Drive in folder "StackOverflow". You can also download a more complete version from this gist.

function getFile(fileURL) {
  // see https://developers.google.com/apps-script/class_urlfetchapp
  var response = UrlFetchApp.fetch(fileURL);
  var fileBlob = response.getBlob()
  var folder = DocsList.getFolder('StackOverflow');
  var result = folder.createFile(fileBlob);
  debugger;  // Stop to observe if in debugger
}

For example:

getFile( "http://mysite.com/files/file.val1.val22.zip" );

Note that you cannot download per se, since you have no access to your PC's resources (e.g. file system) from apps-script. The file is still in "the cloud"... in this case, it's been copied from the web site it was on, into Google Drive. If you're running the Drive app, though, the file will now sync to your PC.

回答2:

Yes, You can.
Hope below code can solve your problem:

//Declare function
function downloadFile() {
  //Getting url,existing name and new name for image from the sheet in 
  //variable url, name and new_name respectively
  var sh = SpreadsheetApp.getActiveSheet();
  var row = sh.getLastRow();
  Logger.log(row);
  for (var i = 2; i <= row; i++) {

    var url = sh.getRange(i, 10).getValue();
    Logger.log(url);
    var name = sh.getRange(i, 13).getValue();
    var new_name = sh.getRange(i, 4).getValue();
    //Creating authentication token for downloading image, it may not be //required if image can be downloaded without login into
    var user = "***************";
    var password = "************";
    var headers = {
      "Accept": "application/xml",
      "Content-Type": "application/xml",
      "Authorization": "Basic " + Utilities.base64Encode(user + ":" + password)
    };
    //defining method to download file
    var options = {
      "method": "get",
      "headers": headers
    };
    //Getting folder name where to store downloaded image
    var folders = DriveApp.getFoldersByName('test');
    while (folders.hasNext()) {
      var folder = folders.next();
      Logger.log(folder.getName());
    }
    //Getting response on hit of url using downloading method defined //earlier storing in Blob
    var response = UrlFetchApp.fetch(url, options).getBlob();
    //Creating image in folder defined with response in blob and logging same file //in log to check, if required
    var file = folder.createFile(response);
    Logger.log(file);

    //renaming image
    var images = folder.getFiles();
    while (images.hasNext()) {
      var image = images.next();
      file.setName(new_name);
      Logger.log(image.getName());
    }
  }
}
//Hope you get it now

来源：https://stackoverflow.com/questions/14573055/can-i-download-file-from-url-link-generated-by-google-apps-script