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Support for unlink().

This commit is contained in:
Alan Kligman 2012-10-12 18:54:12 -04:00
parent d21adc32d7
commit 4dc7474fd5
2 changed files with 84 additions and 35 deletions
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6
examples/test.html
View File

@ -34,10 +34,12 @@ require(["src/filesystem"], function(IDBFS) {
console.log("buffer:", buffer);
}
fs.close(fd, function(error) {
fs.dump(document.getElementById("stdout"));
fs.unlink("/tmp/0", function(error) {
fs.dump(document.getElementById("stdout"));
});
});
});
});
});
});
});

113
src/filesystem.js
View File

@ -33,8 +33,8 @@ define(function(require) {
return {
"parent": parent,
"name": name,
"content-type": "application/directory",
"last-modified": modtime || Date.now()
"contenttype": "application/directory",
"lastmodified": modtime || Date.now()
}
}
@ -43,19 +43,21 @@ define(function(require) {
return {
"parent": parent,
"name": name,
"content-type": "application/file",
"last-modified": modtime || Date.now(),
"contenttype": "application/file",
"lastmodified": modtime || Date.now(),
"size": size || 0,
"object-id": oid || guid()
"oid": oid || guid()
}
}
var METADATA_STORE_NAME = "metadata";
var FILE_STORE_NAME = "files";
var FILE_STORE_NAME = "files";
var NAME_INDEX = "name";
var NAME_INDEX_KEY_PATH = "name";
var PARENT_INDEX = "parent";
var PARENT_INDEX_KEY_PATH = "parent";
var OBJECT_ID_INDEX = "oid";
var OBJECT_ID_INDEX_KEY_PATH = "oid";
var MIME_DIRECTORY = "application/directory";
var MIME_FILE = "application/file";
@ -74,6 +76,7 @@ define(function(require) {
var T_RMDIR = 0x4;
var T_CLOSE = 0x5;
var T_READ = 0x6;
var T_UNLINK = 0x7;
// Codes
var E_EXIST = 0x0;
var E_ISDIR = 0x1;
@ -139,10 +142,13 @@ define(function(require) {
return;
}
transaction = db.transaction([FILE_STORE_NAME], IDB_RO);
transaction.oncomplete = function(e) {
end();
}
var store = transaction.objectStore(FILE_STORE_NAME);
if(MIME_FILE === ofd.entry["content-type"]) {
var oid = ofd.entry["object-id"];
if(MIME_FILE === ofd.entry["contenttype"]) {
var oid = ofd.entry["oid"];
var getRequest = store.get(oid);
getRequest.onsuccess = function(e) {
var storedBuffer = e.target.result;
@ -160,7 +166,6 @@ define(function(require) {
var storedBufferView = storedBuffer.subarray(ofd.pointer, ofd.pointer + bytes);
buffer.set(storedBufferView);
ofd.pointer += bytes;
end();
debug.info("read <--");
if(callback && "function" === typeof callback) {
callback.call(undefined, undefined, bytes, buffer);
@ -168,7 +173,7 @@ define(function(require) {
}
};
getRequest.onerror = onerror;
} else if(MIME_DIRECTORY === ofd.entry["content-type"]) {
} else if(MIME_DIRECTORY === ofd.entry["contenttype"]) {
// NOT IMPLEMENTED
onerror(new IDBFSError(T_READ, E_NOT_IMPLEMENTED))
}
@ -176,19 +181,22 @@ define(function(require) {
function write(buffer, callback) {
debug.info("write -->");
var onerror = genericIDBErrorHandler("write", callback);
if(!start()) {
onerror(new IDBFSError(T_READ, E_BADF));
return;
}
var onerror = genericIDBErrorHandler("write", callback);
if(OM_RO === ofd.mode) {
onerror(new IDBFSError(T_READ, E_BADF));
return;
}
if(!start()) {
onerror(new IDBFSError(T_READ, E_BADF));
return;
}
transaction = db.transaction([METADATA_STORE_NAME, FILE_STORE_NAME], IDB_RW);
transaction.oncomplete = function(e) {
end();
}
var metaStore = transaction.objectStore(METADATA_STORE_NAME);
var fileStore = transaction.objectStore(FILE_STORE_NAME);
var oid = ofd.entry["object-id"];
var oid = ofd.entry["oid"];
var getRequest = fileStore.get(oid);
getRequest.onsuccess = function(e) {
var storedBuffer = e.target.result;
@ -206,11 +214,10 @@ define(function(require) {
var readMetadataRequest = metaStore.get(ofd.entry["name"]);
readMetadataRequest.onsuccess = function(e) {
var entry = e.target.result;
entry = makeFileEntry(entry["name"], entry["object-id"], size);
entry = makeFileEntry(entry["name"], entry["oid"], size);
ofd.entry = entry;
var writeMetadataRequest = metaStore.put(entry, entry["name"]);
writeMetadataRequest.onsuccess = function(e) {
end();
debug.info("write <--");
if(callback && "function" === typeof callback) {
callback.call(undefined, undefined, size, buffer);
@ -289,7 +296,7 @@ define(function(require) {
createRequest.onerror = onerror;
}
} else {
if(entry["content-type"] === MIME_DIRECTORY && mode === OM_RW) {
if(entry["contenttype"] === MIME_DIRECTORY && mode === OM_RW) {
onerror(new IDBFSError(T_OPEN, E_ISDIR));
return;
} else {
@ -414,6 +421,7 @@ define(function(require) {
}
}
};
getRequest.onerror = onerror;
}
function link(oldpath, newpath, callback) {
@ -421,7 +429,38 @@ define(function(require) {
}
function unlink(pathname, callback) {
debug.info("unlink -->");
pathname = path.normalize(pathname);
var transaction = db.transaction([METADATA_STORE_NAME], IDB_RW);
var metaStore = transaction.objectStore(METADATA_STORE_NAME);
var nameIndex = metaStore.index(NAME_INDEX);
var onerror = genericIDBErrorHandler("unlink", callback);
stat(transaction, pathname, function(error, entry) {
if(error) {
onerror(new IDBFSError(T_UNLINK, error));
return;
}
if(MIME_DIRECTORY === entry["contenttype"]) {
onerror(new IDBFSError(T_UNLINK, E_ISDIR));
return;
}
var unlinkRequest = metaStore.delete(entry["name"]);
unlinkRequest.onsuccess = function(e) {
// We don't support links, so this entry is the only entry for the file data
var transaction = db.transaction([FILE_STORE_NAME], IDB_RW);
var fileStore = transaction.objectStore(FILE_STORE_NAME);
var deleteRequest = fileStore.delete(entry["oid"]);
deleteRequest.onsuccess = function(e) {
debug.info("unlink <--");
if(callback && "function" === typeof callback) {
callback.call(undefined, undefined);
}
};
deleteRequest.onerror = onerror;
};
unlinkRequest.onerror = onerror;
});
}
function api() {
@ -442,25 +481,32 @@ define(function(require) {
this.mkdir = mkdir;
this.rmdir = rmdir;
this.stat = stat;
this.link = link;
// this.link = link;
this.unlink = unlink;
this.api = api;
// DEBUG
function dump(element) {
element.innerHTML = "";
var transaction = db.transaction([METADATA_STORE_NAME], IDB_RO);
var store = transaction.objectStore(METADATA_STORE_NAME);
var cursorRequest = store.openCursor();
cursorRequest.onsuccess = function(e) {
var cursor = e.target.result;
if(cursor) {
var getRequest = store.get(cursor.key);
getRequest.onsuccess = function(e) {
var result = e.target.result;
element.innerHTML += JSON.stringify(result) + "<br>";
cursor.continue();
};
element.innerHTML = "Metadata://<br>";
var transaction = db.transaction([METADATA_STORE_NAME, FILE_STORE_NAME], IDB_RO);
var metaStore = transaction.objectStore(METADATA_STORE_NAME);
var fileStore = transaction.objectStore(FILE_STORE_NAME);
var metaRequest = metaStore.openCursor();
metaRequest.onsuccess = function(e) {
var metaCursor = e.target.result;
if(metaCursor) {
element.innerHTML += JSON.stringify(metaCursor.value) + "<br>";
metaCursor.continue();
} else {
element.innerHTML += "Files://<br>"
fileRequest = fileStore.openCursor();
fileRequest.onsuccess = function(e) {
var fileCursor = e.target.result;
if(fileCursor) {
element.innerHTML += JSON.stringify(fileCursor.key) + "<br>";
fileCursor.continue();
}
}
}
};
}
@ -483,6 +529,7 @@ define(function(require) {
var metadata = db.createObjectStore(METADATA_STORE_NAME);
metadata.createIndex(PARENT_INDEX, PARENT_INDEX_KEY_PATH, {unique: false});
metadata.createIndex(NAME_INDEX, NAME_INDEX_KEY_PATH, {unique: true});
metadata.createIndex(OBJECT_ID_INDEX, OBJECT_ID_INDEX_KEY_PATH, {unique: false});
var files = db.createObjectStore(FILE_STORE_NAME);
optFormat = true;