add javascript example

example/provider/javascript/js/webfuse/basefilesystem.js

@@ -27,15 +27,19 @@ class BaseFileSystem {
     }
 
     chmod(path, mode) {
-        return ERRNO.ENOENT;
+        return ERRNO.EPERM;
     }
 
     chown(path, uid, gid) {
-        return ERRNO.ENOENT;
+        return ERRNO.EPERM;
     }
 
     truncate(path, size, fd) {
-        return ERRNO.ENOENT;
+        return ERRNO.EPERM;
+    }
+
+    fsync(path, isDataSync, fd) {
+        return 0;
     }
 
     open(path, flags) {
@@ -43,31 +47,31 @@ class BaseFileSystem {
     }
 
     mknod(path, mode, rdev) {
-        return ERRNO.ENOENT;
+        return ERRNO.EPERM;
     }
 
     create(path, mode) {
-        return [ERNNO.ENOEND, 0];
+        return [ERRNO.EPERM, 0];
     }
 
     release(path, fd) {
-        return ERRNO.ENOENT;
+        return 0;
     }
 
     unlink(path) {
-        return ERRNO.ENOENT;
+        return ERRNO.EPERM;
     }
 
     read(path, size, offset, fd) {
-        return ERRNO.ENOENT;
+        return ERRNO.EBADF;
     }
 
     write(path, data, offset, fd) {
-        return ERRNO.ENOENT;
+        return ERRNO.EBADF;
     }
 
     mkdir(path, mode) {
-        return ERRNO.ENOENT;
+        return ERRNO.EPERM;
     }
 
     readdir(path) {
@@ -75,16 +79,24 @@ class BaseFileSystem {
     }
 
     rmdir(path)  {
-        return ERRNO.ENOENT;
+        return ERRNO.EPERM;
     }
 
     statfs(path) {
-        return ERRNO.ENOENT;
+        return ERRNO.ENOSYS;
+    }
+
+    utimens(path, atime, mtime) {
+        return ERRNO.ENOSYS;
     }
 
     getcreds() {
         return "";
     }
+
+    connectionstatechanged(state) {
+        // pass
+    }
 }
 
 export { BaseFileSystem }

example/provider/javascript/js/webfuse/messagereader.js

@@ -1,7 +1,6 @@
 class MessageReader {
     
     constructor(data) {
-        // console.log(new Uint8Array(data));
         this.raw = data;
         this.data = new DataView(data);
         this.pos = 0;

example/provider/javascript/js/webfuse/messagewriter.js

@@ -67,7 +67,6 @@ class MessageWriter {
     }
 
     get_data() {
-        // console.log(this.data)
         return new Uint8Array(this.data);
     }
 

example/provider/javascript/js/webfuse/openflags.js

@@ -0,0 +1,28 @@
+
+const OpenFlags = {
+    ACCESS_MODE: 0x03,
+    RDONLY : 0o00,
+    WRONLY : 0o01,
+    RDWR   : 0o02,
+
+    APPEND    : 0o00002000,
+    ASYNC     : 0o00020000,
+    CLOEXEC   : 0o02000000,
+    CREAT     : 0o00000100,
+    DIRECT    : 0o00040000,
+    DIRECTORY : 0o00200000,
+    DSYNC     : 0o00010000,
+    EXCL      : 0o00000200,
+    LARGEFILE : 0o00100000,
+    NOATIME   : 0o01000000,
+    NOCTTY    : 0o00000400,
+    NOFOLLOW  : 0o00400000,
+    NONBLOCK  : 0o00004000,
+    NDELAY    : 0o00004000,
+    PATH      : 0o10000000,
+    SYNC      : 0o04010000,
+    TMPFILE   : 0o20200000,
+    TRUNC     : 0o00001000
+};
+
+export { OpenFlags }

example/provider/javascript/js/webfuse/webfuse.js

@@ -2,6 +2,7 @@ import { MessageWriter } from "./messagewriter.js";
 import { MessageReader } from "./messagereader.js";
 import { ERRNO } from "./errno.js";
 import { AccessMode } from "./accessmode.js";
+import { OpenFlags } from "./openflags.js";
 import { BaseFileSystem } from "./basefilesystem.js";
 
 
@@ -20,7 +21,7 @@ const Mode = {
 function fs_access(reader, writer, filesystem) {
     const path = reader.read_str();
     const mode = reader.read_u8();
-    result = filesystem.access(path, mode);
+    const result = filesystem.access(path, mode);
     writer.write_i32(result);
 }
 
@@ -156,7 +157,7 @@ function fs_read(reader, writer, filesystem) {
     const fd = reader.read_u64();
     const result = filesystem.read(path, size, offset, fd);
     if (typeof(result) != "number") {
-        writer.write_i32(0);
+        writer.write_i32(result.length);
         writer.write_bytes(result);
     }
     else {
@@ -259,10 +260,9 @@ const commands = new Map([
 class Webfuse {
 
     constructor(url, filesystem) {
-        console.log('webfuse: ctor')
-
         this.ws = new WebSocket(url, ["webfuse2"]);
         this.ws.binaryType = 'arraybuffer';
+        this.ws.addEventListener('open', (event) => this.on_connected(event));
         this.ws.addEventListener('close', (event) => this.on_closed(event));
         this.ws.addEventListener('error', (event) => this.on_error(event));
         this.ws.addEventListener('message', (event) => this.on_message(event));
@@ -285,21 +285,25 @@ class Webfuse {
             command(reader, writer, this.filesystem);
         }
         else {
-            console.error(`unknow message type: ${message_type}`);
+            console.warn(`unknow message type: ${message_type}`);
         }
 
         this.ws.send(writer.get_data());
     }
 
+    on_connected(event) {
+        this.filesystem.connectionstatechanged("connected");
+    }
+
     on_error(event) {
-        console.log('error', event);
+        console.info("connection error");
         this.ws.close();
     }
 
     on_closed(event) {
-        console.log('closed', event);
+        this.filesystem.connectionstatechanged("closed");
     }
 
 }
 
-export { Webfuse, BaseFileSystem, ERRNO, Mode, AccessMode }
+export { Webfuse, BaseFileSystem, ERRNO, Mode, AccessMode, OpenFlags }