HTTP, JSON, APIs, secrets, and failure handling
Handle service failures with clear retry and stop rules.
Reviewed: 2026-10-03
Source-based teaching example · Fictional data
Narration: Microsoft Mark · locally synthesized

00:00:00.000 — What you will learn

Handle service failures with clear retry and stop rules.

Visual description:
Handle service failures with clear retry and stop rules.

00:00:06.583 — The idea

Some failures may be temporary; others need a correction before another attempt. Limit both attempts and waiting time. Do not repeat a write if it might create a duplicate effect.

Visual description:
Some failures may be temporary; others need a correction before another attempt. Limit both attempts and waiting time. Do not repeat a write if it might create a duplicate effect.

00:00:21.125 — One useful term

Retry budget. The maximum attempts and waiting time allowed for a request.

Visual description:
The maximum attempts and waiting time allowed for a request.

00:00:29.125 — A worked example

The mock returns rate-limit and service errors, bad JSON and an authentication error. The exercise retries selected temporary failures within its budget. Bad JSON fails its format check; the authentication error stops immediately.

Visual description:
The mock returns rate-limit and service errors, bad JSON and an authentication error. The exercise retries selected temporary failures within its budget. Bad JSON fails its format check; the authentication error stops immediately.

00:00:48.500 — Your turn to think

Should every failure be retried until it works? Pause and decide before continuing.

Visual description:
Should every failure be retried until it works?
Pause the video if you need more time.

00:01:05.000 — Why this answer works

No. Follow the declared rules. Protect repeated writes, respect the deadline and keep secrets out of logs.

Visual description:
No. Follow the declared rules. Protect repeated writes, respect the deadline and keep secrets out of logs.

00:01:15.917 — Check 1

Use the allowed attempt and time limits.

Visual description:
Use the allowed attempt and time limits.

00:01:21.250 — Check 2

Separate temporary and contract failures.

Visual description:
Separate temporary and contract failures.

00:01:27.083 — Check 3

Log outcomes rather than secret-bearing content.

Visual description:
Log outcomes rather than secret-bearing content.

00:01:33.042 — Now try a different case

Open the lesson and try its different practice case. Use every check in the full task. Watching alone does not mark the lesson complete.

Visual description:
Open the lesson
Try the new case
Check and revise
The full task and its requirements are in the linked lesson.