data-transform-api

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Data transformation API — convert between JSON, CSV, XML. Flatten, filter, sort, pick fields, compute stats, and validate data. Zero dependencies beyond Express.

Quick Start

npm install && npm start  # http://localhost:3600

Endpoints

Convert

# JSON → CSV
curl -X POST http://localhost:3600/api/v1/json-to-csv \
  -H "Content-Type: application/json" \
  -d '{"data": [{"name":"Alice","age":30},{"name":"Bob","age":25}]}'

# CSV → JSON
curl -X POST http://localhost:3600/api/v1/csv-to-json \
  -H "Content-Type: application/json" \
  -d '{"csv": "name,age\nAlice,30\nBob,25"}'

# JSON → XML
curl -X POST http://localhost:3600/api/v1/json-to-xml \
  -H "Content-Type: application/json" \
  -d '{"data": {"user": {"name": "Alice", "age": 30}}, "rootName": "response"}'

Transform

# Flatten nested JSON
curl -X POST http://localhost:3600/api/v1/flatten \
  -H "Content-Type: application/json" \
  -d '{"data": {"user": {"name": "Alice", "address": {"city": "Seoul"}}}}'
# → {"user.name": "Alice", "user.address.city": "Seoul"}

# Unflatten
curl -X POST http://localhost:3600/api/v1/unflatten \
  -H "Content-Type: application/json" \
  -d '{"data": {"user.name": "Alice", "user.age": 30}}'

# Filter (supports >, <, !)
curl -X POST http://localhost:3600/api/v1/filter \
  -H "Content-Type: application/json" \
  -d '{"data": [{"name":"Alice","age":30},{"name":"Bob","age":25}], "query": {"age": ">26"}}'

# Pick specific fields
curl -X POST http://localhost:3600/api/v1/pick \
  -H "Content-Type: application/json" \
  -d '{"data": [{"name":"Alice","age":30,"email":"a@b.c"}], "fields": ["name","age"]}'

# Sort
curl -X POST http://localhost:3600/api/v1/sort \
  -H "Content-Type: application/json" \
  -d '{"data": [{"name":"Bob","age":25},{"name":"Alice","age":30}], "field": "name"}'

# Stats
curl -X POST http://localhost:3600/api/v1/stats \
  -H "Content-Type: application/json" \
  -d '{"data": [{"score":85},{"score":92},{"score":78}], "field": "score"}'
# → {"count":3, "sum":255, "mean":85, "min":78, "max":92, "median":85}

# Validate JSON
curl -X POST http://localhost:3600/api/v1/validate \
  -H "Content-Type: application/json" \
  -d '{"data": {"valid": true}}'

License

MIT

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