fix: ensure PdfReader is closed

[roudy16]

The issue is that objects created by the PdfReader have a tendency to linger in memory.

I was memory profiling with tracemalloc my use-case and noticed a lot of Pdf-related objects in the summary. After applying this change the objects didn't show up in the trace summary and my memory consumption post-run was reduced.

Summary by CodeRabbit

• Refactor
  • Improved resource management when processing PDF files to ensure files are properly closed after use. No changes to user-facing features.

[coderabbitai]

Walkthrough

The parse_pdf_to_text function was updated to use a single with statement that manages both the file opening and the PdfReader instantiation as context managers. This change improves resource management by ensuring both are properly closed after use. No changes were made to the function's signature.

Changes

File(s)	Change Summary
src/backend/base/langflow/base/data/utils.py	Refactored parse_pdf_to_text to use a single with statement for file and PdfReader context management.

Sequence Diagram(s)

sequenceDiagram
    participant Caller
    participant Utils (parse_pdf_to_text)
    participant File
    participant PdfReader

    Caller->>Utils (parse_pdf_to_text): Call with file_path
    Utils (parse_pdf_to_text)->>File: Open file as context manager
    Utils (parse_pdf_to_text)->>PdfReader: Instantiate as context manager with file
    PdfReader-->>Utils (parse_pdf_to_text): Extract text
    Utils (parse_pdf_to_text)->>File: Close file (automatically)
    Utils (parse_pdf_to_text)->>PdfReader: Close reader (automatically)
    Utils (parse_pdf_to_text)-->>Caller: Return extracted text

Loading

---

📜 Recent review details

Configuration used: .coderabbit.yaml
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between cf985bd and c99f8a1.

📒 Files selected for processing (1)

• src/backend/base/langflow/base/data/utils.py (1 hunks)

⏰ Context from checks skipped due to timeout of 90000ms (3)

• GitHub Check: Update Starter Projects
• GitHub Check: Run Ruff Check and Format
• GitHub Check: Ruff Style Check (3.13)

🔇 Additional comments (1)

src/backend/base/langflow/base/data/utils.py (1)

133-134: ```shell
#!/bin/bash
set -e

Install pypdf to test PdfReader context manager support

pip install pypdf

Test PdfReader for context manager methods

python3 - << 'EOF'
from pypdf import PdfReader

has_enter = hasattr(PdfReader, 'enter')
has_exit = hasattr(PdfReader, 'exit')

print(f'PdfReader has enter: {has_enter}')
print(f'PdfReader has exit: {has_exit}')
print(f'Context manager support: {has_enter and has_exit}')
print(f'MRO: {[cls.name for cls in PdfReader.mro]}')
EOF

</details>

</blockquote></details>

</details>
<!-- internal state start -->


<!-- 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 -->

<!-- internal state end -->
<!-- finishing_touch_checkbox_start -->

<details open="true">
<summary>✨ Finishing Touches</summary>

- [ ] <!-- {"checkboxId": "7962f53c-55bc-4827-bfbf-6a18da830691"} --> 📝 Generate Docstrings
<details open="true">
<summary>🧪 Generate Unit Tests</summary>

- [ ] <!-- {"checkboxId": "f47ac10b-58cc-4372-a567-0e02b2c3d479", "radioGroupId": "utg-output-choice-group-unknown_comment_id"} -->   Create PR with Unit Tests
- [ ] <!-- {"checkboxId": "07f1e7d6-8a8e-4e23-9900-8731c2c87f58", "radioGroupId": "utg-output-choice-group-unknown_comment_id"} -->   Post Copyable Unit Tests in Comment

</details>

</details>

<!-- finishing_touch_checkbox_end -->
<!-- tips_start -->

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

<details>
<summary>❤️ Share</summary>

- [X](https://twitter.com/intent/tweet?text=I%20just%20used%20%40coderabbitai%20for%20my%20code%20review%2C%20and%20it%27s%20fantastic%21%20It%27s%20free%20for%20OSS%20and%20offers%20a%20free%20trial%20for%20the%20proprietary%20code.%20Check%20it%20out%3A&url=https%3A//coderabbit.ai)
- [Mastodon](https://mastodon.social/share?text=I%20just%20used%20%40coderabbitai%20for%20my%20code%20review%2C%20and%20it%27s%20fantastic%21%20It%27s%20free%20for%20OSS%20and%20offers%20a%20free%20trial%20for%20the%20proprietary%20code.%20Check%20it%20out%3A%20https%3A%2F%2Fcoderabbit.ai)
- [Reddit](https://www.reddit.com/submit?title=Great%20tool%20for%20code%20review%20-%20CodeRabbit&text=I%20just%20used%20CodeRabbit%20for%20my%20code%20review%2C%20and%20it%27s%20fantastic%21%20It%27s%20free%20for%20OSS%20and%20offers%20a%20free%20trial%20for%20proprietary%20code.%20Check%20it%20out%3A%20https%3A//coderabbit.ai)
- [LinkedIn](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Fcoderabbit.ai&mini=true&title=Great%20tool%20for%20code%20review%20-%20CodeRabbit&summary=I%20just%20used%20CodeRabbit%20for%20my%20code%20review%2C%20and%20it%27s%20fantastic%21%20It%27s%20free%20for%20OSS%20and%20offers%20a%20free%20trial%20for%20proprietary%20code)

</details>

<details>
<summary>🪧 Tips</summary>

### Chat

There are 3 ways to chat with [CodeRabbit](https://coderabbit.ai?utm_source=oss&utm_medium=github&utm_campaign=langflow-ai/langflow&utm_content=8636):

- Review comments: Directly reply to a review comment made by CodeRabbit. Example:
  - `I pushed a fix in commit <commit_id>, please review it.`
  - `Explain this complex logic.`
  - `Open a follow-up GitHub issue for this discussion.`
- Files and specific lines of code (under the "Files changed" tab): Tag `@coderabbitai` in a new review comment at the desired location with your query. Examples:
  - `@coderabbitai explain this code block.`
  -	`@coderabbitai modularize this function.`
- PR comments: Tag `@coderabbitai` in a new PR comment to ask questions about the PR branch. For the best results, please provide a very specific query, as very limited context is provided in this mode. Examples:
  - `@coderabbitai gather interesting stats about this repository and render them as a table. Additionally, render a pie chart showing the language distribution in the codebase.`
  - `@coderabbitai read src/utils.ts and explain its main purpose.`
  - `@coderabbitai read the files in the src/scheduler package and generate a class diagram using mermaid and a README in the markdown format.`
  - `@coderabbitai help me debug CodeRabbit configuration file.`

### Support

Need help? Create a ticket on our [support page](https://www.coderabbit.ai/contact-us/support) for assistance with any issues or questions.

Note: Be mindful of the bot's finite context window. It's strongly recommended to break down tasks such as reading entire modules into smaller chunks. For a focused discussion, use review comments to chat about specific files and their changes, instead of using the PR comments.

### CodeRabbit Commands (Invoked using PR comments)

- `@coderabbitai pause` to pause the reviews on a PR.
- `@coderabbitai resume` to resume the paused reviews.
- `@coderabbitai review` to trigger an incremental review. This is useful when automatic reviews are disabled for the repository.
- `@coderabbitai full review` to do a full review from scratch and review all the files again.
- `@coderabbitai summary` to regenerate the summary of the PR.
- `@coderabbitai generate docstrings` to [generate docstrings](https://docs.coderabbit.ai/finishing-touches/docstrings) for this PR.
- `@coderabbitai generate sequence diagram` to generate a sequence diagram of the changes in this PR.
- `@coderabbitai auto-generate unit tests` to generate unit tests for this PR.
- `@coderabbitai resolve` resolve all the CodeRabbit review comments.
- `@coderabbitai configuration` to show the current CodeRabbit configuration for the repository.
- `@coderabbitai help` to get help.

### Other keywords and placeholders

- Add `@coderabbitai ignore` anywhere in the PR description to prevent this PR from being reviewed.
- Add `@coderabbitai summary` to generate the high-level summary at a specific location in the PR description.
- Add `@coderabbitai` anywhere in the PR title to generate the title automatically.

### Documentation and Community

- Visit our [Documentation](https://docs.coderabbit.ai) for detailed information on how to use CodeRabbit.
- Join our [Discord Community](http://discord.gg/coderabbit) to get help, request features, and share feedback.
- Follow us on [X/Twitter](https://twitter.com/coderabbitai) for updates and announcements.

</details>

<!-- tips_end -->

[ogabrielluiz]

Thank you @roudy16 ! Good catch

This LGTM