Stage 3 · Build
Standard Library for Operations
Encoding & Config
encoding/json, yaml adapters, csv parsing, base64, and strict schema decoding.
6 min readGo for SREBuild
JSON Encoding
encoding/json is the standard JSON package. It handles marshaling, unmarshaling, streaming, and struct tags. It is fast enough for most use cases.
Gojson-operations.go
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json.MarshalIndent produces human-readable output. json.Decoder streams from io.Reader — more efficient for large payloads. json.RawMessage delays parsing — useful for polymorphic types. omitempty omits zero values.
YAML Handling
Goyaml-operations.go
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yaml.v3 is the standard YAML package. It supports streaming, multi-document files, and struct tags. SetIndent controls indentation. yaml.v3 handles YAML 1.2 and is more strict than yaml.v2.
CSV Parsing
Gocsv-operations.go
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csv.NewReader reads CSV files. FieldsPerRecord = -1 allows variable field counts. TrimLeadingSpace removes whitespace. csv.NewWriter writes CSV files. Always call Flush after writing. Streaming reads prevent loading entire files into memory.
Base64 Encoding
Gobase64-operations.go
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StdEncoding uses A-Z, a-z, 0-9, +, /. URLEncoding replaces + and / with - and _ for URLs. RawStdEncoding omits padding. Stream encoding/decoding is efficient for large data.
Strict Decoding
Gostrict-json-decoding.go
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DisallowUnknownFields rejects JSON with unexpected fields — catches typos and config drift. Validate after decoding to enforce business rules. Combine strict decoding with validation for robust configuration loading.
Streaming Encoding
Gostreaming-json-processing.go
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Streaming decode processes one item at a time without loading the entire array into memory. json.Decoder.Token reads structural tokens (brackets, commas). json.More checks if there are more items. This handles gigabyte-sized JSON files.
Use streaming for large payloads
json.Unmarshal loads the entire payload into memory. json.NewDecoder streams from an io.Reader. For large files or network responses, always use streaming decode to prevent memory exhaustion.
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