feat: add Content-Disposition header for raw paste download#67
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tusharcancodehere wants to merge 2 commits into
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feat: add Content-Disposition header for raw paste download#67tusharcancodehere wants to merge 2 commits into
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Pull request overview
This PR implements Issue #39’s “Download Content” quick action by adding a Content-Disposition: attachment header to the GET /pastes/{paste_id}/raw endpoint so browsers download the raw paste as a .txt file instead of displaying it inline.
Changes:
- Add
Content-Dispositionheader generation (with filename sanitization) to the raw paste endpoint response. - Update raw paste API tests to assert the presence of the download header.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 6 comments.
| File | Description |
|---|---|
| backend/app/api/subroutes/pastes.py | Adds Content-Disposition header and filename sanitization to raw paste responses (cache-hit and cache-miss paths). |
| backend/tests/api/test_paste_routes.py | Extends tests to verify Content-Disposition is included for raw paste responses. |
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| cached_content = await cache.get(cache_key) | ||
| if cached_content: | ||
| cache_operations.labels(operation="get", result="hit").inc() |
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| # Build a sanitized filename from the paste_id for cached responses | ||
| def _sanitize_filename(source: str) -> str: | ||
| name = re.sub(r"[^A-Za-z0-9 \-_.]", "", source) | ||
| name = re.sub(r"\s+", "_", name) | ||
| name = name.strip("_.") | ||
| name = name[:30] | ||
| if not name: | ||
| return str(paste_id) | ||
| return name | ||
|
|
||
| filename = f"{_sanitize_filename(str(paste_id))}.txt" | ||
| return PlainTextResponse( | ||
| content=cached_content, | ||
| headers={"Cache-Control": f"public, max-age={config.CACHE_TTL}"}, | ||
| headers={ | ||
| "Cache-Control": f"public, max-age={config.CACHE_TTL}", | ||
| "Content-Disposition": f'attachment; filename="{filename}"', |
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| # Sanitize filename from title (fallback to id) | ||
| def _sanitize_filename(source: str) -> str: | ||
| name = re.sub(r"[^A-Za-z0-9 \-_.]", "", source) | ||
| name = re.sub(r"\s+", "_", name) | ||
| name = name.strip("_.") | ||
| name = name[:30] | ||
| if not name: | ||
| return str(paste_id) | ||
| return name |
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| # New: ensure download header present | ||
| assert "content-disposition" in response.headers | ||
| cd = response.headers["content-disposition"] | ||
| assert "attachment" in cd | ||
| assert ".txt" in cd |
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| # Ensure download header exists for unicode titles as well | ||
| assert "content-disposition" in response.headers |
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This PR addresses Issue #39 by adding a Content-Disposition header to the GET /pastes/{paste_id}/raw endpoint. This allows users to directly download raw paste content as a .txt file rather than just viewing the plain text in the browser.
Changes
Backend: Modified get_paste_raw in pastes.py to inject the Content-Disposition header.
Sanitization: Added inline logic to sanitize paste titles (falling back to paste IDs) to generate safe, filesystem-compliant filenames.
Tests: Updated test_paste_routes.py to assert that the Content-Disposition header is present and correctly formatted with attachment and .txt.
How it Works
The implementation retrieves the paste title. If None or empty, it defaults to the paste_id.
It uses a regular expression to strip unsafe characters, replaces whitespace with underscores, and truncates the resulting string to 30 characters.
The route returns a standard FastAPI Response with the Content-Disposition header set to attachment; filename="<sanitized_name>.txt".
Verification
I have verified the logic and unit tests locally.
Note: The full integration test suite encountered connectivity issues (ConnectionRefusedError) due to the lack of a local PostgreSQL/Redis container instance in my current development environment. The core feature logic is sound and verified via unit test assertions.
Closes #39