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Fix Utilities.Internal.md5Async() on missing files and empty strings

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https://forums.zotero.org/discussion/114208/zotero-7-beta-bug-report-consistent-error-when-syncing
This commit is contained in:
Dan Stillman 2024-05-08 01:16:37 -04:00
parent 8f2bf50cec
commit 85f58cc97d
2 changed files with 37 additions and 9 deletions
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28
chrome/content/zotero/xpcom/utilities_internal.js
View file

@ -139,14 +139,28 @@ Zotero.Utilities.Internal = {
/**
* @param {nsIFile|String} file File or file path
* @param {Boolean} [base64=FALSE] Return as base-64-encoded string
* rather than hex string
*/
md5Async: async function (file, base64) {
md5Async: async function (file) {
function toHexString(charCode) {
return ("0" + charCode.toString(16)).slice(-2);
}
var file = Zotero.File.pathToFile(file);
try {
let { size } = await IOUtils.stat(file.path);
if (size === 0) {
// MD5 for empty string
return "d41d8cd98f00b204e9800998ecf8427e";
}
}
catch (e) {
// Return false for missing files
if (e.name == "NotFoundError") {
return false;
}
throw e;
}
var ch = Components.classes["@mozilla.org/security/hash;1"]
.createInstance(Components.interfaces.nsICryptoHash);
ch.init(ch.MD5);
@ -156,12 +170,8 @@ Zotero.Utilities.Internal = {
.createInstance(Ci.nsIFileInputStream);
is.init(Zotero.File.pathToFile(file), -1, -1, Ci.nsIFileInputStream.CLOSE_ON_EOF);
ch.updateFromStream(is, -1);
let hash = ch.finish(base64);
// Base64
if (base64) {
return hash;
}
// Hex string
// Get binary string and convert to hex string
let hash = ch.finish(false);
let hexStr = "";
for (let i = 0; i < hash.length; i++) {
hexStr += toHexString(hash.charCodeAt(i));

18
test/tests/utilities_internalTest.js
View file

@ -44,6 +44,24 @@ describe("Zotero.Utilities.Internal", function () {
yield OS.File.remove(file);
});
it("should return false for a nonexistent file", async function () {
var tmpDir = Zotero.getTempDirectory().path;
var file = OS.Path.join(tmpDir, 'nonexistent-asawefaweoihafa');
await assert.eventually.isFalse(ZUI.md5Async(file));
});
it("should return hash for an empty file", async function () {
const emptyHash = 'd41d8cd98f00b204e9800998ecf8427e';
var tmpDir = Zotero.getTempDirectory().path;
var file = OS.Path.join(tmpDir, 'empty-file');
await IOUtils.write(file, new Uint8Array());
await assert.eventually.equal(ZUI.md5Async(file), emptyHash);
await IOUtils.remove(file);
});
})