@jupyterlab/services - npm Package Compare versions

Comparing version 7.5.4 to 7.5.5

lib/kernel/comm.d.ts

@@ -111,2 +111,3 @@ import { JSONObject } from '@lumino/coreutils';
     private _maybeStartSubshell;
+    private _closePerCommTargetSubshell;
     private _maybeCloseSubshell;
@@ -113,0 +114,0 @@ private _subshellStarted;

lib/kernel/comm.js

@@ -100,9 +100,15 @@ "use strict";
     set commsOverSubshells(value) {
+        if (value === this._commsOverSubshells) {
+            // Do nothing if the value is not changing.
+            return;
+        }
+        const closePromise = this._maybeCloseSubshell(this._commsOverSubshells);
         this._commsOverSubshells = value;
-        if (this._commsOverSubshells === CommsOverSubshells.Disabled) {
-            this._maybeCloseSubshell();
-        }
-        else {
-            void this._maybeStartSubshell();
-        }
+        closePromise
+            .then(() => {
+            if (this._commsOverSubshells !== CommsOverSubshells.Disabled) {
+                void this._maybeStartSubshell();
+            }
+        })
+            .catch(console.warn);
     }
@@ -257,3 +263,3 @@ /**
     dispose() {
-        this._maybeCloseSubshell();
+        void this._maybeCloseSubshell(this._commsOverSubshells);
         super.dispose();
@@ -280,2 +286,3 @@ }
         // One shell per comm-target
+        const subshellStarted = this._subshellStarted;
         const kernelId = this._kernel.id;
@@ -285,29 +292,93 @@ if (!CommHandler._commTargetSubShellsId.hasOwnProperty(kernelId)) {
         }
-        const kernelCommTargetSubShells = CommHandler._commTargetSubShellsId[kernelId];
-        if (kernelCommTargetSubShells[this._target]) {
-            this._subshellId = await kernelCommTargetSubShells[this._target];
-            this._subshellStarted.resolve();
+        const kernelCommTargetSubshells = CommHandler._commTargetSubShellsId[kernelId];
+        const existingEntry = kernelCommTargetSubshells[this._target];
+        if (existingEntry) {
+            existingEntry.referenceCount += 1;
+            try {
+                this._subshellId = await existingEntry.subshellId;
+                subshellStarted.resolve();
+            }
+            catch (e) {
+                // If the future rejected we need to close the subshell to avoid leaks
+                await this._closePerCommTargetSubshell(false);
+                subshellStarted.reject(`Per comm-target subshell creation failed: ${e}`);
+            }
+            return;
         }
-        else {
-            // Create subshell
-            kernelCommTargetSubShells[this._target] = this._kernel
+        const entry = {
+            subshellId: this._kernel
                 .requestCreateSubshell({})
-                .done.then(replyMsg => {
-                this._subshellId = replyMsg.content.subshell_id;
-                return this._subshellId;
-            });
-            await kernelCommTargetSubShells[this._target];
-            this._subshellStarted.resolve();
+                .done.then(replyMsg => replyMsg.content.subshell_id),
+            referenceCount: 1
+        };
+        kernelCommTargetSubshells[this._target] = entry;
+        try {
+            this._subshellId = await entry.subshellId;
+            subshellStarted.resolve();
         }
+        catch (e) {
+            // If the future rejected we need to close the subshell to avoid leaks
+            await this._closePerCommTargetSubshell(false);
+            subshellStarted.reject(`Per comm-target subshell creation failed: ${e}`);
+        }
     }
-    _maybeCloseSubshell() {
-        // Only close subshell if we have one subshell per comm
-        if (this._commsOverSubshells !== CommsOverSubshells.PerComm) {
+    async _closePerCommTargetSubshell(shouldAskKernelToDelete = true) {
+        const kernelId = this._kernel.id;
+        const target = this._target;
+        if (CommHandler._commTargetSubShellsId.hasOwnProperty(kernelId)) {
+            // Close the subshell for this target if this is the last comm.
+            const kernelTargets = CommHandler._commTargetSubShellsId[kernelId];
+            const entry = kernelTargets[target];
+            if (entry) {
+                entry.referenceCount -= 1;
+                if (entry.referenceCount <= 0) {
+                    if (shouldAskKernelToDelete) {
+                        let subshellId = null;
+                        try {
+                            subshellId = await entry.subshellId;
+                        }
+                        catch (e) {
+                            console.warn(`Subshell identifier not available in the closeout sequence, will not request deletion: ${e}`);
+                        }
+                        if (subshellId !== null) {
+                            this._kernel.requestDeleteSubshell({ subshell_id: subshellId }, true);
+                        }
+                    }
+                    delete kernelTargets[target];
+                }
+            }
+            if (Object.keys(kernelTargets).length === 0) {
+                delete CommHandler._commTargetSubShellsId[kernelId];
+            }
+            // Clear identifier
             this._subshellId = null;
+        }
+        // Restart promise delegate to subsequent startup
+        this._subshellStarted = new coreutils_1.PromiseDelegate();
+    }
+    async _maybeCloseSubshell(mode) {
+        if (this._kernel.status === 'dead') {
             return;
         }
-        if (this._subshellId && this._kernel.status !== 'dead') {
-            this._kernel.requestDeleteSubshell({ subshell_id: this._subshellId }, true);
+        switch (mode) {
+            case CommsOverSubshells.PerComm: {
+                if (this._subshellId) {
+                    // Close the only subshell
+                    this._kernel.requestDeleteSubshell({ subshell_id: this._subshellId }, true);
+                    // Clear identifier
+                    this._subshellId = null;
+                }
+                // Restart promise delegate to subsequent startup
+                this._subshellStarted = new coreutils_1.PromiseDelegate();
+                break;
+            }
+            case CommsOverSubshells.PerCommTarget: {
+                await this._closePerCommTargetSubshell();
+                break;
+            }
+            case CommsOverSubshells.Disabled: {
+                // no-op
+                break;
+            }
         }
-        this._subshellId = null;
     }
@@ -314,0 +385,0 @@ }

lib/kernel/comm.js.map

@@ -1,1 +0,1 @@
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package.json

 {
   "name": "@jupyterlab/services",
-  "version": "7.5.4",
+  "version": "7.5.5",
   "description": "Client APIs for the Jupyter services REST APIs",
@@ -49,6 +49,6 @@ "keywords": [
     "@jupyter/ydoc": "^3.1.0",
-    "@jupyterlab/coreutils": "^6.5.4",
-    "@jupyterlab/nbformat": "^4.5.4",
-    "@jupyterlab/settingregistry": "^4.5.4",
-    "@jupyterlab/statedb": "^4.5.4",
+    "@jupyterlab/coreutils": "^6.5.5",
+    "@jupyterlab/nbformat": "^4.5.5",
+    "@jupyterlab/settingregistry": "^4.5.5",
+    "@jupyterlab/statedb": "^4.5.5",
     "@lumino/coreutils": "^2.2.2",
@@ -62,3 +62,3 @@ "@lumino/disposable": "^2.1.5",
   "devDependencies": {
-    "@jupyterlab/testing": "^4.5.4",
+    "@jupyterlab/testing": "^4.5.5",
     "@types/jest": "^29.2.0",
@@ -65,0 +65,0 @@ "@types/ws": "^8.5.3",

src/kernel/comm.ts

@@ -90,8 +90,15 @@ // Copyright (c) Jupyter Development Team.
   set commsOverSubshells(value: CommsOverSubshells) {
+    if (value === this._commsOverSubshells) {
+      // Do nothing if the value is not changing.
+      return;
+    }
+    const closePromise = this._maybeCloseSubshell(this._commsOverSubshells);
     this._commsOverSubshells = value;
-    if (this._commsOverSubshells === CommsOverSubshells.Disabled) {
-      this._maybeCloseSubshell();
-    } else {
-      void this._maybeStartSubshell();
-    }
+    closePromise
+      .then(() => {
+        if (this._commsOverSubshells !== CommsOverSubshells.Disabled) {
+          void this._maybeStartSubshell();
+        }
+      })
+      .catch(console.warn);
   }
@@ -271,3 +278,3 @@
   dispose(): void {
-    this._maybeCloseSubshell();
+    void this._maybeCloseSubshell(this._commsOverSubshells);
 
@@ -299,2 +306,3 @@ super.dispose();
     // One shell per comm-target
+    const subshellStarted = this._subshellStarted;
     const kernelId = this._kernel.id;
@@ -304,34 +312,104 @@ if (!CommHandler._commTargetSubShellsId.hasOwnProperty(kernelId)) {
     }
-    const kernelCommTargetSubShells =
+    const kernelCommTargetSubshells =
       CommHandler._commTargetSubShellsId[kernelId];
-    if (kernelCommTargetSubShells[this._target]) {
-      this._subshellId = await kernelCommTargetSubShells[this._target];
-      this._subshellStarted.resolve();
-    } else {
-      // Create subshell
-      kernelCommTargetSubShells[this._target] = this._kernel
+    const existingEntry = kernelCommTargetSubshells[this._target];
+    if (existingEntry) {
+      existingEntry.referenceCount += 1;
+      try {
+        this._subshellId = await existingEntry.subshellId;
+        subshellStarted.resolve();
+      } catch (e) {
+        // If the future rejected we need to close the subshell to avoid leaks
+        await this._closePerCommTargetSubshell(false);
+        subshellStarted.reject(
+          `Per comm-target subshell creation failed: ${e}`
+        );
+      }
+      return;
+    }
+
+    const entry: Private.ISubshellEntry = {
+      subshellId: this._kernel
         .requestCreateSubshell({})
-        .done.then(replyMsg => {
-          this._subshellId = replyMsg.content.subshell_id;
-          return this._subshellId;
-        });
-      await kernelCommTargetSubShells[this._target];
-      this._subshellStarted.resolve();
+        .done.then(replyMsg => replyMsg.content.subshell_id),
+      referenceCount: 1
+    };
+    kernelCommTargetSubshells[this._target] = entry;
+    try {
+      this._subshellId = await entry.subshellId;
+      subshellStarted.resolve();
+    } catch (e) {
+      // If the future rejected we need to close the subshell to avoid leaks
+      await this._closePerCommTargetSubshell(false);
+      subshellStarted.reject(`Per comm-target subshell creation failed: ${e}`);
     }
   }
 
-  private _maybeCloseSubshell() {
-    // Only close subshell if we have one subshell per comm
-    if (this._commsOverSubshells !== CommsOverSubshells.PerComm) {
+  private async _closePerCommTargetSubshell(shouldAskKernelToDelete = true) {
+    const kernelId = this._kernel.id;
+    const target = this._target;
+    if (CommHandler._commTargetSubShellsId.hasOwnProperty(kernelId)) {
+      // Close the subshell for this target if this is the last comm.
+      const kernelTargets = CommHandler._commTargetSubShellsId[kernelId];
+      const entry = kernelTargets[target];
+      if (entry) {
+        entry.referenceCount -= 1;
+        if (entry.referenceCount <= 0) {
+          if (shouldAskKernelToDelete) {
+            let subshellId: string | null = null;
+            try {
+              subshellId = await entry.subshellId;
+            } catch (e) {
+              console.warn(
+                `Subshell identifier not available in the closeout sequence, will not request deletion: ${e}`
+              );
+            }
+            if (subshellId !== null) {
+              this._kernel.requestDeleteSubshell(
+                { subshell_id: subshellId },
+                true
+              );
+            }
+          }
+          delete kernelTargets[target];
+        }
+      }
+      if (Object.keys(kernelTargets).length === 0) {
+        delete CommHandler._commTargetSubShellsId[kernelId];
+      }
+      // Clear identifier
       this._subshellId = null;
-      return;
     }
+    // Restart promise delegate to subsequent startup
+    this._subshellStarted = new PromiseDelegate<void>();
+  }
 
-    if (this._subshellId && this._kernel.status !== 'dead') {
-      this._kernel.requestDeleteSubshell(
-        { subshell_id: this._subshellId },
-        true
-      );
+  private async _maybeCloseSubshell(mode: CommsOverSubshells) {
+    if (this._kernel.status === 'dead') {
+      return;
     }
-    this._subshellId = null;
+    switch (mode) {
+      case CommsOverSubshells.PerComm: {
+        if (this._subshellId) {
+          // Close the only subshell
+          this._kernel.requestDeleteSubshell(
+            { subshell_id: this._subshellId },
+            true
+          );
+          // Clear identifier
+          this._subshellId = null;
+        }
+        // Restart promise delegate to subsequent startup
+        this._subshellStarted = new PromiseDelegate<void>();
+        break;
+      }
+      case CommsOverSubshells.PerCommTarget: {
+        await this._closePerCommTargetSubshell();
+        break;
+      }
+      case CommsOverSubshells.Disabled: {
+        // no-op
+        break;
+      }
+    }
   }
@@ -342,3 +420,5 @@
     // One subshell per kernel per comm target.
-    [kernelId: string]: { [targetName: string]: Promise<string> | null };
+    [kernelId: string]: {
+      [targetName: string]: Private.ISubshellEntry;
+    };
   } = {};
@@ -357,1 +437,22 @@
 }
+
+/**
+ * Private interfaces of comm handler.
+ */
+namespace Private {
+  /**
+   * Describes an entry in the static tracker of subshells used in per-comm-target mode.
+   */
+  export interface ISubshellEntry {
+    /**
+     * Promise which resolves with subshell identifier once it is known.
+     */
+    subshellId: Promise<string>;
+    /**
+     * Keeps track of the number of references to the subshell.
+     *
+     * This is used to guard subshells shared across comm targets from premature disposal.
+     */
+    referenceCount: number;
+  }
+}

New alerts

Network access

Supply chain risk

This module accesses the network.

Found 1 instance in 1 package

Uses eval

Supply chain risk

Package uses dynamic code execution (e.g., eval()), which is a dangerous practice. This can prevent the code from running in certain environments and increases the risk that the code may contain exploits or malicious behavior.

Found 2 instances in 1 package

Environment variable access

Supply chain risk

Package accesses environment variables, which may be a sign of credential stuffing or data theft.

Found 2 instances in 1 package

Long strings

Supply chain risk

Contains long string literals, which may be a sign of obfuscated or packed code.

Found 1 instance in 1 package

URL strings

Supply chain risk

Package contains fragments of external URLs or IP addresses, which the package may be accessing at runtime.

Found 1 instance in 1 package

Fixed alerts

Network access

Supply chain risk

This module accesses the network.

Found 1 instance in 1 package

Uses eval

Supply chain risk

Package uses dynamic code execution (e.g., eval()), which is a dangerous practice. This can prevent the code from running in certain environments and increases the risk that the code may contain exploits or malicious behavior.

Found 2 instances in 1 package

Environment variable access

Supply chain risk

Package accesses environment variables, which may be a sign of credential stuffing or data theft.

Found 2 instances in 1 package

Long strings

Supply chain risk

Contains long string literals, which may be a sign of obfuscated or packed code.

Found 1 instance in 1 package

URL strings

Supply chain risk

Package contains fragments of external URLs or IP addresses, which the package may be accessing at runtime.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

1406460

0.68%

Lines of code

31553

0.56%

Worsened metrics

Number of low supply chain risk alerts

96

1.05%

Dependency changes

• Updated

  @jupyterlab/coreutils@^6.5.5

• Updated

  @jupyterlab/nbformat@^4.5.5

• Updated

  @jupyterlab/settingregistry@^4.5.5

• Updated

  @jupyterlab/statedb@^4.5.5