http
8 minHTTP range requests: resume transfers without stitching different files
Use validators, Content-Range, and 416 handling to make partial downloads coherent.
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23 matching resultsArticles and interview answers
http
6 minHTTP conditional writes: detect an edit based on stale state
Use strong validators and atomic preconditions to prevent lost updates without confusing them with retry identity.
Q&A
Q&AWhy can COPY . invalidate dependency layers in a Docker build?
Every later layer is invalidated when an earlier instruction input changes.
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If the whole source tree is copied before dependency installation, any source edit changes that COPY layer and invalidates all subsequent build steps. Copy lockfiles first, install from them, then copy source. Confirm the result with build output and a clean build; cache reuse should improve speed, not alter correctness.
Q&A
Q&AWhy does a byte offset alone not make a download safe to resume?
The representation may have changed since the saved prefix was downloaded.
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Use a validator such as a strong ETag with If-Range, validate the 206 Content-Range before append, and verify final integrity separately. An ETag is not necessarily a cryptographic digest.
security
8 minCSRF defenses: reason from browser credential attachment, not CORS
Separate cross-site request forgery from cross-origin response access and validate state changes.
security
5 minSecurity Boundaries: Object Authorization, Input Validation, and Secret Handling
Enforce access on individual resources, keep data separate from executable structure, and prevent sensitive values from crossing logging and build boundaries.
Q&A
Q&AWhat should a client do with a valid 304 response to If-None-Match?
A 304 validates a previously cached representation and does not provide a replacement body. Cache policy and authorization still control whether reuse is appropriate.
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A 304 validates a previously cached representation and does not provide a replacement body. Cache policy and authorization still control whether reuse is appropriate.
http
5 minReliable API Clients: Pagination, Conditional Requests, and Retry Budgets
Keep list traversal stable, validate cached representations, and bound retry work when networks fail at ambiguous points.