User description
writeFileSync encoding option can take 'base64'
And this might be optimized at some point
PR Type
Enhancement
Description
-
Simplify base64 file writing using native encoding option
-
Remove unnecessary Buffer.from() conversion overhead
-
Leverage fs.writeFileSync() built-in base64 support
Diagram Walkthrough
flowchart LR
A["base64Content string"] -->|"Buffer.from conversion"| B["Buffer object"]
B -->|"writeFileSync"| C["File written"]
A -->|"direct encoding option"| D["File written optimized"]
File Walkthrough
| Relevant files |
|---|
| Enhancement |
webdriver.jsSimplify base64 encoding in file write operation
javascript/selenium-webdriver/lib/webdriver.js
- Replace
Buffer.from(base64Content, 'base64') with direct encoding
parameter
- Pass
'base64' as third argument to fs.writeFileSync()
- Eliminates intermediate Buffer object creation
- Improves performance by leveraging native Node.js file system API
|
+1/-1 |
|
All committers have signed the CLA.
PR Compliance Guide 🔍
Below is a summary of compliance checks for this PR:
| Security Compliance |
| ⚪ |
Unvalidated file write
Description: Writing unvalidated base64 content directly to disk can allow path-based or storage abuse
if upstream 'response.contents' or 'fileName' are attacker-controlled; ensure 'fileName'
and content source are trusted and validated.
webdriver.js [1740-1744]
Referred Code
fs.mkdirSync(targetDirectory, { recursive: true })
const zipFilePath = path.join(targetDirectory, `${fileName}.zip`)
fs.writeFileSync(zipFilePath, base64Content, 'base64')
const zipData = fs.readFileSync(zipFilePath)
|
| Ticket Compliance |
| ⚪ | 🎫 No ticket provided
- [ ] Create ticket/issue <!-- /create_ticket --create_ticket=true -->
|
| Codebase Duplication Compliance |
| ⚪ | Codebase context is not defined
Follow the guide to enable codebase context checks.
|
| Custom Compliance |
| 🟢 |
Generic: Meaningful Naming and Self-Documenting Code
Objective: Ensure all identifiers clearly express their purpose and intent, making code
self-documenting
Status: Passed
|
Generic: Secure Error Handling
Objective: To prevent the leakage of sensitive system information through error messages while
providing sufficient detail for internal debugging.
Status: Passed
|
| ⚪ |
Generic: Comprehensive Audit Trails
Objective: To create a detailed and reliable record of critical system actions for security analysis
and compliance.
Status:
Missing audit logging: The new file write of decoded base64 content is not logged, so it’s unclear which
user/action triggered the write and its outcome.
Referred Code
fs.mkdirSync(targetDirectory, { recursive: true })
const zipFilePath = path.join(targetDirectory, `${fileName}.zip`)
fs.writeFileSync(zipFilePath, base64Content, 'base64')
const zipData = fs.readFileSync(zipFilePath)
await JSZip.loadAsync(zipData)
|
Generic: Robust Error Handling and Edge Case Management
Objective: Ensure comprehensive error handling that provides meaningful context and graceful
degradation
Status:
Unhandled write errors: The direct call to fs.writeFileSync with base64 encoding lacks try/catch or error handling
for invalid base64, I/O failures, or permission issues.
Referred Code
fs.mkdirSync(targetDirectory, { recursive: true })
const zipFilePath = path.join(targetDirectory, `${fileName}.zip`)
fs.writeFileSync(zipFilePath, base64Content, 'base64')
const zipData = fs.readFileSync(zipFilePath)
await JSZip.loadAsync(zipData)
|
Generic: Secure Logging Practices
Objective: To ensure logs are useful for debugging and auditing without exposing sensitive
information like PII, PHI, or cardholder data.
Status:
No redaction assurance: Writing decoded content to disk may involve sensitive data, and there is no accompanying
structured logging or confirmation that sensitive content is not logged elsewhere.
Referred Code
fs.mkdirSync(targetDirectory, { recursive: true })
const zipFilePath = path.join(targetDirectory, `${fileName}.zip`)
fs.writeFileSync(zipFilePath, base64Content, 'base64')
const zipData = fs.readFileSync(zipFilePath)
await JSZip.loadAsync(zipData)
|
Generic: Security-First Input Validation and Data Handling
Objective: Ensure all data inputs are validated, sanitized, and handled securely to prevent
vulnerabilities
Status:
Unvalidated input: The base64 input from response.contents is written directly without validation of encoding
correctness, size limits, or path safety for targetDirectory/fileName.
Referred Code
const base64Content = response.contents
if (!targetDirectory.endsWith('/')) {
targetDirectory += '/'
}
fs.mkdirSync(targetDirectory, { recursive: true })
const zipFilePath = path.join(targetDirectory, `${fileName}.zip`)
fs.writeFileSync(zipFilePath, base64Content, 'base64')
|
- [ ] Update <!-- /compliance --update_compliance=true -->
|
Compliance status legend
🟢 - Fully Compliant
🟡 - Partial Compliant
🔴 - Not Compliant
⚪ - Requires Further Human Verification
🏷️ - Compliance label
PR Code Suggestions ✨
Explore these optional code suggestions:
| Category | Suggestion | Impact |
| Possible issue |
Await asynchronous operations in loop
Replace the forEach loop with Promise.all and map to correctly await the
asynchronous file writing operations and prevent a race condition. Also, use
path.join for constructing file paths.
javascript/selenium-webdriver/lib/webdriver.js [1748-1752]
-Object.keys(zip.files).forEach(async (fileName) => {
- const fileData = await zip.files[fileName].async('nodebuffer')
- fs.writeFileSync(`${targetDirectory}/${fileName}`, fileData)
- console.log(`File extracted: ${fileName}`)
-})
+await Promise.all(
+ Object.keys(zip.files).map(async (fileName) => {
+ const fileData = await zip.files[fileName].async('nodebuffer')
+ fs.writeFileSync(path.join(targetDirectory, fileName), fileData)
+ console.log(`File extracted: ${fileName}`)
+ }),
+)
[To ensure code accuracy, apply this suggestion manually]
Suggestion importance[1-10]: 9
__
Why: The suggestion correctly identifies a race condition bug where forEach is used with an async callback, which can lead to the function resolving before file operations are complete. The proposed fix using Promise.all is the correct pattern to solve this issue.
| High
|
Propagate errors in promise chain
Re-throw the error inside the .catch block to ensure that failures during the
unzipping process are propagated to the caller of the downloadFile function.
javascript/selenium-webdriver/lib/webdriver.js [1754-1756]
.catch((error) => {
console.error('Error unzipping file:', error)
+ throw error
})
[To ensure code accuracy, apply this suggestion manually]
Suggestion importance[1-10]: 8
__
Why: The suggestion correctly identifies a significant error handling flaw where an error is caught but not propagated, causing the function to appear successful to the caller. Re-throwing the error is crucial for robust error handling.
| Medium
|
| General |
Avoid unnecessary intermediate file I/O
Improve efficiency by passing the base64Content string directly to
JSZip.loadAsync with the { base64: true } option, thus avoiding the unnecessary
step of writing to and reading from a temporary zip file.
javascript/selenium-webdriver/lib/webdriver.js [1742-1745]
-fs.writeFileSync(zipFilePath, base64Content, 'base64')
+// The zip file does not need to be written to disk.
+// fs.writeFileSync(zipFilePath, base64Content, 'base64')
-const zipData = fs.readFileSync(zipFilePath)
-await JSZip.loadAsync(zipData)
+// const zipData = fs.readFileSync(zipFilePath)
+await JSZip.loadAsync(base64Content, { base64: true })
- [ ] Apply / Chat <!-- /improve --apply_suggestion=2 -->
Suggestion importance[1-10]: 7
__
Why: The suggestion provides a significant performance and simplification improvement by avoiding unnecessary file I/O. Processing the base64 content directly in memory is more efficient and makes the code cleaner.
| Medium
|
- [ ] Update <!-- /improve_multi --more_suggestions=true -->
| |
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