tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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browser_blobFromFile.js (1669B)

      1 add_task(async function test() {
      2  await SpecialPowers.pushPrefEnv({
      3    set: [["browser.tabs.remote.separateFileUriProcess", true]],
      4  });
      5 
      6  let fileData = "";
      7  for (var i = 0; i < 100; ++i) {
      8    fileData += "hello world!";
      9  }
     10 
     11  let file = Services.dirsvc.get("ProfD", Ci.nsIFile);
     12  file.append("file.txt");
     13  file.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0o600);
     14 
     15  let outStream = Cc[
     16    "@mozilla.org/network/file-output-stream;1"
     17  ].createInstance(Ci.nsIFileOutputStream);
     18  outStream.init(
     19    file,
     20    0x02 | 0x08 | 0x20, // write, create, truncate
     21    // eslint-disable-next-line no-octal
     22    0666,
     23    0
     24  );
     25  outStream.write(fileData, fileData.length);
     26  outStream.close();
     27 
     28  let fileHandler = Services.io
     29    .getProtocolHandler("file")
     30    .QueryInterface(Ci.nsIFileProtocolHandler);
     31 
     32  let fileURL = fileHandler.getURLSpecFromActualFile(file);
     33 
     34  info("Opening url: " + fileURL);
     35  let tab = BrowserTestUtils.addTab(gBrowser, fileURL);
     36 
     37  let browser = gBrowser.getBrowserForTab(tab);
     38  await BrowserTestUtils.browserLoaded(browser);
     39 
     40  let blob = await SpecialPowers.spawn(
     41    browser,
     42    [file.leafName],
     43    function (fileName) {
     44      return new content.window.Promise(resolve => {
     45        let xhr = new content.window.XMLHttpRequest();
     46        xhr.responseType = "blob";
     47        xhr.open("GET", fileName);
     48        xhr.send();
     49        xhr.onload = function () {
     50          resolve(xhr.response);
     51        };
     52      });
     53    }
     54  );
     55 
     56  ok(File.isInstance(blob), "We have a file");
     57 
     58  is(blob.size, file.fileSize, "The size matches");
     59  is(blob.name, file.leafName, "The name is correct");
     60 
     61  file.remove(false);
     62 
     63  gBrowser.removeTab(tab);
     64 });