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Rest APIprogramming~7 mins

REST vs SOAP vs GraphQL comparison in Rest API

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Introduction

APIs help different programs talk to each other. REST, SOAP, and GraphQL are three ways to build these APIs. Knowing their differences helps you pick the best one for your project.

You want a simple and fast way to get or send data over the internet.
You need strict rules and security for exchanging messages between systems.
You want clients to ask for exactly the data they need, no more, no less.
You are building a mobile app that needs to reduce data usage.
You want to connect many different services with flexible queries.
Syntax
Rest API
REST:
- Uses URLs (endpoints) to access resources.
- Uses HTTP methods like GET, POST, PUT, DELETE.
- Data usually in JSON format.

SOAP:
- Uses XML messages.
- Has a strict message format with envelope and headers.
- Uses protocols like HTTP, SMTP.

GraphQL:
- Uses a single endpoint.
- Clients send queries specifying exactly what data they want.
- Data returned in JSON format.

REST is easy to use and popular for web APIs.

SOAP is more formal and used in enterprise systems needing high security.

Examples
Get user with ID 123 using REST.
Rest API
REST example:
GET /users/123
Response: {"id":123, "name":"Alice"}
SOAP message to get user 123.
Rest API
<Envelope>
  <Body>
    <GetUser>
      <UserId>123</UserId>
    </GetUser>
  </Body>
</Envelope>
GraphQL query to get user 123's id and name.
Rest API
GraphQL example:
query {
  user(id: 123) {
    id
    name
  }
}
Sample Program

This program shows how REST, SOAP, and GraphQL requests look. It fetches user data with REST, shows a SOAP message, and a GraphQL query.

Rest API
import requests

# REST example: Get user data
rest_response = requests.get('https://jsonplaceholder.typicode.com/users/1')
print('REST response:', rest_response.json())

# SOAP example: Simple SOAP request (mocked as string here)
soap_request = '''
<Envelope>
  <Body>
    <GetUser>
      <UserId>1</UserId>
    </GetUser>
  </Body>
</Envelope>
'''
print('SOAP request:', soap_request.strip())

# GraphQL example: Query user data
graphql_query = '''
query {
  user(id: 1) {
    id
    name
  }
}
'''
print('GraphQL query:', graphql_query.strip())
OutputSuccess
Important Notes

REST is usually faster and easier to use but less strict.

SOAP has built-in error handling and security but is more complex.

GraphQL reduces over-fetching data but needs more setup on the server.

Summary

REST uses simple URLs and HTTP methods to work with resources.

SOAP uses XML and strict message formats for secure communication.

GraphQL lets clients ask for exactly the data they want in one request.