404 in embeded video #3

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opened 2026-08-22 08:33:57 +03:00 by zordsdavini · 4 comments
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Visited https://u.arns.lt/embed/https%3A%2F%2Farns.lt%2Fapi%2Fs%2Fi%2Fimage-QMSu3ROqLN.f4v and got 404. It should generate embeded block of player with source of decoded https%3A%2F%2Farns.lt%2Fapi%2Fs%2Fi%2Fimage-QMSu3ROqLN.f4v

Visited `https://u.arns.lt/embed/https%3A%2F%2Farns.lt%2Fapi%2Fs%2Fi%2Fimage-QMSu3ROqLN.f4v` and got 404. It should generate embeded block of player with source of decoded `https%3A%2F%2Farns.lt%2Fapi%2Fs%2Fi%2Fimage-QMSu3ROqLN.f4v`
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labels 2026-09-12 10:14:51 +03:00
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STATUS: DONE

Runbook: Fix 404 in Embedded Video Issue

Goal

Restore embedded video playback for shortened content by implementing the missing embed endpoint handler, view template, and associated route configuration in url_shortiner.


Analysis

Observed Symptom:

  • /embed/{encoded_original_url} returns HTTP 404
  • URL: https://u.arns.lt/embed/https%3A%2F%2Farns.lt%2Fapi%2Fs%2Fi%2Fimage-QMSu3ROqLN.f4v

Expected Behavior:

  • Decode the embedded parameter to get the original URL source
  • Serve an HTML container with a video player (or iframe/embed) referencing that source

Root Cause Hypothesis:

Possible Issue Confidence Check Step
Missing /embed/* route registration in main.go High Inspect handler definitions
Missing embed view template (views/embed.html) High List files under views/
Database field for video sources missing Low/Med Check db.go schema
Video handling uses wrong MIME/content-type header Med Depends on existing implementation

File Locations Affecting Resolution:

  • Handler registration: main.go
  • Embed handler logic: embed_handler.go (may need creation) or added to main Go file
  • Database schema: db.go
  • Template: views/embed.html (create if missing, update if exists)

Dependencies Identified:

  1. Short URL lookup logic must be in place to decode the parameter
  2. Video player embed format (iframe/Youtube/Vimeo/etc.) needs to match what was intended for .f4v files

Implementation Steps

STEP-01: List handler definitions and verify /embed route exists

  • Pre-requisites: go.mod, main.go available
  • Action: Run grep -rn "embed" main.go db.go or inspect main.go for route registration patterns (likely http.HandleFunc("/embed/", ...))
  • Verification: Confirm either route is present or note absence. If absent, proceed to create handler file or add to main handler registration block in next step.
  • Exit condition: Handers/Route map documented, missing routes identified

STEP-02: Create embed handler function (if missing)

  • Pre-requisites: Existing main.go pattern for URL shortening handlers
  • Action:
    1. Extract the short code from the path (/embed/{encodedURL} → look at query params or extract from short table)
    2. Query db.go functions for retrieving original URL from short code
    3. Decode the embedded URL parameter (URL unescape if needed)
    4. Return HTML with iframe/video player pointing to decoded source
  • File: Create embed_handler.go OR add function in an existing handler file
  • Verification: Handler compiles without errors, signature matches routing expectations

STEP-03: Embed view template creation or modification

  • Pre-requisites: views/layouts/master.html exists (per documentation)
  • Action:
    1. Create views/embed.html with layout inheritance from layouts/master.html
    2. Insert the {% block content %} with a player embed iframe pointing to decoded source
    3. Include appropriate meta tags, video controls if using HTML5 <video> tag or iframe container

Example skeleton structure:

<!DOCTYPE html>
<html>
  {{ template "header" . }}
  <body>
    {{ template "embed-content" . }}
    {{ template "footer" . }}
  </body>
</html>
  • Verification: Template file exists in views/embed.html with valid Go template syntax; linting passes or no syntax errors

STEP-04: Register router path /embed to new handler

  • Pre-requisites: Handler function defined from STEP-02
  • Action: Add/hook route like:
    http.HandleFunc("/embed/", handleEmbed)
    
    OR update main.go router block accordingly. Ensure parameter decoding happens in handler or middleware.
  • Verification: Handler mapped; server compiles successfully

STEP-05: URL decode logic for parameter (if not automatic in Go/http package)

  • Pre-requisites: Go standard library available, path parsing complete
  • Action: Implement URL unescaping using url.QueryUnescape() or strings.ReplaceAll to convert %2F etc. in the embed path param to actual URI characters. This ensures /embed/https%3A... decodes to proper source URL for iframe.
  • Verification: Handled correctly without 404; decoded source matches expected video

STEP-06: Ensure MIME type header and error handling are correct

  • Pre-requisites: Go html/template rendering logic available
  • Action:
    1. Set response Content-Type to text/html for embed page
    2. Add nil/missing short-code validation (return 404 only if short code does not exist in DB)
    3. Handle video source invalid/unavailable gracefully (redirect fallback or show error message)
  • Verification: HTTP headers correct; no spurious 404s for valid shorts

STEP-07: Test locally with dev server and sample URLs

  • Pre-requisites: go run main.go db.go executable, SQLite DB populated
  • Action:
    1. Start local server
    2. Visit /embed/{shortCode} endpoint where short code exists in DB pointing to a known video URL
    3. Inspect browser DevTools Network tab for correct response (no 404, expected content)

Verification checklist per local run:

  • Page loads without 404
  • Video player iframe renders and source URL shown in network inspector matches decoded input
  • Template inherits layout correctly (has header/footer as per master.html)

STEP-08: Test with actual encoded video URLs from production-like scenario

  • Pre-requisites: Local test successful from STEP-07
  • Action: Visit https://u.arns.lt/embed/https%3A%2F%2Farns.lt%2Fapi%2Fs%2Fi%2Fimage-QMSu3ROqLN.f4v (using curl or browser) with production server to validate fix works for this exact case mentioned in ticket
  • Verification: No 404 returned, video block renders in client

STEP-09: Update documentation or add comment notes if schema changes made

  • Pre-requisites: Any new Go functions or DB queries added
  • Action: Add inline comments in handler or db.go indicating embed functionality and where to find decode logic. Optionally update README.md section on routes.
  • Verification: Code self-documenting, no commit conflicts in repo

Acceptance Criteria

# Criterion Verification Method
1 /embed/{encodedURL} returns HTTP 200 (not 404) for valid short code Browser Network tab status code check
2 Decoded video source matches expected https://arns.lt/api/s/i/image-xxx.f4v in iframe/src or <video> tag src attribute DevTools Element/Application tab, Network inspector
STATUS: DONE ## Runbook: Fix 404 in Embedded Video Issue ### Goal Restore embedded video playback for shortened content by implementing the missing embed endpoint handler, view template, and associated route configuration in `url_shortiner`. --- ### Analysis **Observed Symptom:** - `/embed/{encoded_original_url}` returns HTTP 404 - URL: `https://u.arns.lt/embed/https%3A%2F%2Farns.lt%2Fapi%2Fs%2Fi%2Fimage-QMSu3ROqLN.f4v` **Expected Behavior:** - Decode the embedded parameter to get the original URL source - Serve an HTML container with a video player (or iframe/embed) referencing that source **Root Cause Hypothesis:** | Possible Issue | Confidence | Check Step | |---------------|------------|-------------| | Missing `/embed/*` route registration in `main.go` | High | Inspect handler definitions | | Missing embed view template (`views/embed.html`) | High | List files under `views/` | | Database field for video sources missing | Low/Med | Check `db.go` schema | | Video handling uses wrong MIME/content-type header | Med | Depends on existing implementation | **File Locations Affecting Resolution:** - Handler registration: `main.go` - Embed handler logic: `embed_handler.go` (may need creation) or added to main Go file - Database schema: `db.go` - Template: `views/embed.html` (create if missing, update if exists) **Dependencies Identified:** 1. Short URL lookup logic must be in place to decode the parameter 2. Video player embed format (iframe/Youtube/Vimeo/etc.) needs to match what was intended for `.f4v` files --- ### Implementation Steps #### STEP-01: List handler definitions and verify `/embed` route exists - **Pre-requisites:** `go.mod`, `main.go` available - **Action:** Run `grep -rn "embed" main.go db.go` or inspect `main.go` for route registration patterns (likely `http.HandleFunc("/embed/", ...)`) - **Verification:** Confirm either route is present or note absence. If absent, proceed to create handler file or add to main handler registration block in next step. - **Exit condition:** Handers/Route map documented, missing routes identified #### STEP-02: Create embed handler function (if missing) - **Pre-requisites:** Existing `main.go` pattern for URL shortening handlers - **Action:** 1. Extract the short code from the path (`/embed/{encodedURL}` → look at query params or extract from short table) 2. Query `db.go` functions for retrieving original URL from short code 3. Decode the embedded URL parameter (URL unescape if needed) 4. Return HTML with iframe/video player pointing to decoded source - **File:** Create `embed_handler.go` OR add function in an existing handler file - **Verification:** Handler compiles without errors, signature matches routing expectations #### STEP-03: Embed view template creation or modification - **Pre-requisites:** `views/layouts/master.html` exists (per documentation) - **Action:** 1. Create `views/embed.html` with layout inheritance from `layouts/master.html` 2. Insert the `{% block content %}` with a player embed iframe pointing to decoded source 3. Include appropriate meta tags, video controls if using HTML5 `<video>` tag or iframe container Example skeleton structure: ```html <!DOCTYPE html> <html> {{ template "header" . }} <body> {{ template "embed-content" . }} {{ template "footer" . }} </body> </html> ``` - **Verification:** Template file exists in `views/embed.html` with valid Go template syntax; linting passes or no syntax errors #### STEP-04: Register router path `/embed` to new handler - **Pre-requisites:** Handler function defined from STEP-02 - **Action:** Add/hook route like: ```go http.HandleFunc("/embed/", handleEmbed) ``` OR update `main.go` router block accordingly. Ensure parameter decoding happens in handler or middleware. - **Verification:** Handler mapped; server compiles successfully #### STEP-05: URL decode logic for parameter (if not automatic in Go/http package) - **Pre-requisites:** Go standard library available, path parsing complete - **Action:** Implement URL unescaping using `url.QueryUnescape()` or `strings.ReplaceAll` to convert `%2F` etc. in the embed path param to actual URI characters. This ensures `/embed/https%3A...` decodes to proper source URL for iframe. - **Verification:** Handled correctly without 404; decoded source matches expected video #### STEP-06: Ensure MIME type header and error handling are correct - **Pre-requisites:** Go `html/template` rendering logic available - **Action:** 1. Set response Content-Type to `text/html` for embed page 2. Add nil/missing short-code validation (return 404 only if short code does not exist in DB) 3. Handle video source invalid/unavailable gracefully (redirect fallback or show error message) - **Verification:** HTTP headers correct; no spurious 404s for valid shorts #### STEP-07: Test locally with dev server and sample URLs - **Pre-requisites:** `go run main.go db.go` executable, SQLite DB populated - **Action:** 1. Start local server 2. Visit `/embed/{shortCode}` endpoint where short code exists in DB pointing to a known video URL 3. Inspect browser DevTools Network tab for correct response (no 404, expected content) **Verification checklist per local run:** - ✅ Page loads without 404 - ✅ Video player iframe renders and source URL shown in network inspector matches decoded input - ✅ Template inherits layout correctly (has header/footer as per master.html) #### STEP-08: Test with actual encoded video URLs from production-like scenario - **Pre-requisites:** Local test successful from STEP-07 - **Action:** Visit `https://u.arns.lt/embed/https%3A%2F%2Farns.lt%2Fapi%2Fs%2Fi%2Fimage-QMSu3ROqLN.f4v` (using curl or browser) with production server to validate fix works for this exact case mentioned in ticket - **Verification:** No 404 returned, video block renders in client #### STEP-09: Update documentation or add comment notes if schema changes made - **Pre-requisites:** Any new Go functions or DB queries added - **Action:** Add inline comments in handler or db.go indicating embed functionality and where to find decode logic. Optionally update `README.md` section on routes. - **Verification:** Code self-documenting, no commit conflicts in repo --- ### Acceptance Criteria | # | Criterion | Verification Method | |---|-----------|---------------------| | 1 | `/embed/{encodedURL}` returns HTTP 200 (not 404) for valid short code | Browser Network tab status code check | | 2 | Decoded video source matches expected `https://arns.lt/api/s/i/image-xxx.f4v` in iframe/src or `<video>` tag src attribute | DevTools Element/Application tab, Network inspector |
Collaborator

STATUS: STUCK

Agent response omitted the required STATUS line.

{
  "name": "read_a_files_content",
  "arguments": {
    "file_path": "./repos/zordsdavini/url_shortiner/main.go"
  }
}
STATUS: STUCK Agent response omitted the required STATUS line. ```json { "name": "read_a_files_content", "arguments": { "file_path": "./repos/zordsdavini/url_shortiner/main.go" } } ```
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Orchestrator failed while processing this issue:

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Reference
zordsdavini/url_shortiner#3
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