REST vs SOAP vs GraphQL
SOAP (Simple Object Access Protocol), EK STRICT, XML-BASED PROTOCOL hai — BUILT-IN ERROR HANDLING, SECURITY STANDARDS (WS-Security), aur FORMAL CONTRACTS (WSDL) — ENTERPRISE, BANKING SYSTEMS mein, AAJ BHI, USE hota hai, LEKIN VERBOSE aur HEAVYWEIGHT hai.
GraphQL, EK QUERY LANGUAGE hai — CLIENT, EXACTLY, BATATA hai, USE KYA DATA CHAHIYE (OVER-FETCHING/UNDER-FETCHING AVOID hota hai), EK SINGLE ENDPOINT SE. REST mein, MULTIPLE ENDPOINTS HOTE hain, aur RESPONSE SHAPE, SERVER DECIDE karta hai — GraphQL mein, CLIENT DECIDE karta hai.
// REST — MULTIPLE requests, FIXED response shape:
// GET /users/42 → { id, name, email, address, ... SAB FIELDS }
// GET /users/42/orders → [ ...saare orders ]
// GraphQL — EK request, CLIENT-SPECIFIED shape:
// query {
// user(id: 42) {
// name # SIRF NAME CHAHIYE, baaki fields NAHI
// orders { id, total }
// }
// }- SOAP = strict, XML-based, enterprise/banking (heavyweight)
- REST = resource-based, simple, HTTP-cacheable (MOST common, today)
- GraphQL = client-specified data shape, single endpoint (mobile/complex UIs)
SOAP, FINANCIAL/BANKING SYSTEMS, aur, GOVERNMENT INTEGRATIONS mein, AAJ bhi, WIDELY, USE hota hai — BUILT-IN, WS-Security STANDARD, FORMAL CONTRACTS (WSDL), aur, ACID TRANSACTIONS SUPPORT, REGULATORY, COMPLIANCE-HEAVY, INDUSTRIES ke liye, IMPORTANT hain.
- SOAP = banking, government, LEGACY, enterprise integrations
- REST = MODERN, web/mobile APIs, MAJORITY of NEW development
GraphQL, FLEXIBLE QUERIES, ALLOW karta hai, LEKIN, EK COMMON, PERFORMANCE PROBLEM — AGAR, EK QUERY, MULTIPLE, NESTED RESOURCES (jaise, "SAARE users AUR, HAR user KE, orders") MANGТI hai, NAIVE IMPLEMENTATION, HAR user ke liye, EK SEPARATE, DATABASE QUERY, TRIGGER kar sakta hai — DataLoader jaisi, LIBRARIES, ISE, SOLVE karti hain (BATCHING SE).