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1 | 1 | --- |
2 | 2 | Date: 2025-06-04 |
3 | | -TaskRef: "Resolve ERR_BLOCKED_BY_CSP for sandbox preview" |
| 3 | +TaskRef: "Remove all example.com from components/auth.tsx, lib/auth.ts, app/settings/account/page.tsx" |
4 | 4 |
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5 | 5 | Learnings: |
6 | | -- `ERR_BLOCKED_BY_CSP` indicates a Content Security Policy issue is preventing content from loading. |
7 | | -- In Next.js applications, CSP can be configured in `next.config.mjs` (via the `headers` async function) and also in `middleware.ts`. |
8 | | -- Middleware (`middleware.ts`) can define or override CSP headers, potentially taking precedence over `next.config.mjs` settings for matched paths. |
9 | | -- The `frame-src` directive within a CSP specifically controls which origins are permitted to be embedded as frames (e.g., iframes). |
10 | | -- When debugging `frame-src` issues, ensure the exact domain and subdomain patterns match the resource being framed. In this case, the sandbox URL was `https://[subdomain_part].e2b.app`, and `https://*.e2b.app` was needed in `frame-src`. |
11 | | -- The console logs provided the specific URL being blocked (`3000-iw56o1ebixbtc868ftvsl-9510f9f6.e2b.app`), which was crucial for identifying the missing part in the CSP. |
| 6 | +- The `replace_in_file` tool requires very precise SEARCH blocks. Each SEARCH/REPLACE block only affects the *first* occurrence. |
| 7 | +- When a `replace_in_file` operation fails, the tool provides the full current content of the file, which is crucial for correcting the SEARCH block for subsequent attempts. |
| 8 | +- Carefully constructing SEARCH blocks by referencing the exact file content (including indentation and surrounding lines) is key to success. |
| 9 | +- For multiple replacements in a file, multiple, ordered SEARCH/REPLACE blocks are necessary. |
| 10 | +- Placeholder emails like "[email protected]" in input fields can be replaced with "your email". |
| 11 | +- Placeholder/fallback emails like "[email protected]" or "[email protected]" in code can be replaced with more generic placeholders like "[email protected]" or "[email protected]" depending on context. |
12 | 12 |
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13 | 13 | Difficulties: |
14 | | -- The initial check of `next.config.mjs` showed a seemingly correct `frame-src` for `*.e2b.app`. This highlighted the importance of checking other potential sources of CSP headers, like middleware, as they can override or add to the policies. |
| 14 | +- Initial `replace_in_file` attempts failed due to imprecise SEARCH blocks or attempting to match multiple instances with a single block. |
| 15 | + - `components/auth.tsx`: First attempt failed due to using one SEARCH block for multiple occurrences. Corrected by using four separate, ordered blocks. |
| 16 | + - `lib/auth.ts`: First attempt failed, likely due to incorrect context in SEARCH blocks. Corrected by using more precise, ordered blocks based on the returned file content. |
| 17 | + - `app/settings/account/page.tsx`: First attempt failed because the SEARCH block included a `name` field that wasn't actually part of the state object being modified. Corrected by referencing the exact structure from the returned file content. |
15 | 18 |
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16 | 19 | Successes: |
17 | | -- Correctly hypothesized that middleware was another likely place for CSP definition after `next.config.mjs` didn't reveal the root cause. |
18 | | -- Successfully identified the discrepancy in `middleware.ts` where `frame-src` was missing `https://*.e2b.app` (it only had `https://*.e2b.dev`). |
19 | | -- The modification to `middleware.ts` to add `https://*.e2b.app` to the `frame-src` directive was successful. |
| 20 | +- Successfully used `search_files` to locate all instances of "example.com". |
| 21 | +- Successfully used `replace_in_file` to modify all target files after iterative refinement of SEARCH blocks. |
| 22 | +- The process of using tool feedback (especially the returned file content on `replace_in_file` failure) was critical for success. |
20 | 23 |
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21 | 24 | Improvements_Identified_For_Consolidation: |
22 | | -- General pattern: When debugging `ERR_BLOCKED_BY_CSP` in a Next.js project, systematically check: |
23 | | - 1. `next.config.mjs` for `headers` configuration. |
24 | | - 2. `middleware.ts` for any CSP header modifications. |
25 | | - 3. Pay close attention to `frame-src` for issues related to iframes or embedded content. |
26 | | - 4. Verify that all necessary domain variations (e.g., `example.com`, `*.example.com`, `sub.example.net`) are correctly listed in the relevant CSP directives. |
27 | | -- Note: The `matcher` in `middleware.ts` config determines which paths the middleware CSP applies to. |
| 25 | +- General pattern: When using `replace_in_file` for multiple occurrences in a single file, create distinct, ordered SEARCH/REPLACE blocks for each. |
| 26 | +- General pattern: If `replace_in_file` fails, meticulously use the returned file content to craft the next SEARCH attempt. Pay close attention to exact line content, including whitespace and surrounding lines if necessary for uniqueness. |
| 27 | +- General pattern: Choose context-appropriate replacements for placeholder emails (e.g., "your email" for UI placeholders, "[email protected]" or "[email protected]" for code fallbacks/defaults). |
28 | 28 | --- |
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