Summary

HTTP Search APIs are interfaces that allow users to submit queries and receive responses containing data or documents matching those queries over the HTTP protocol. These APIs are typically designed to handle complex search operations on large datasets and are integral to numerous online services.

Details

HTTP Search APIs enable querying databases, search engines, or any data-driven service via the HTTP protocol. These APIs usually accept queries in the form of URI parameters and offer responses in formats like JSON or XML. They leverage standard HTTP methods, primarily GET for retrieving search results. A well-designed search API provides efficient, scalable access to search functions with features like pagination, filtering, sorting, and field-specific searches.

This pattern is different than the Resource Collection Filtering pattern, as it may allow for more generalized search queries across multiple properties. This pattern may also return results across multiple resource collections, rather than constraining the search to a single resource collection.

For more complex search query support or for a more secure search capability, refer to the HTTP Search APIs Using POST page.

Common Pattern Names/Synonyms

  • Search endpoint
  • Query API
  • Data retrieval API

Common Use Cases

  1. E-commerce Platforms: For product searches where users can query by keywords, categories, price range, etc.
  2. Content Management Systems: To search through articles, blogs, and other written content by keywords or tags.
  3. Social Media Platforms: For user-generated content searches, including posts, comments, and multimedia content.
  4. Enterprise Data Systems: For searching through extensive corporate databases including employee info, project data, and operational metrics.

Mermaid Sequence Diagrams

Below are the Mermaid diagrams illustrating the sequence of a typical search operation via an HTTP Search API.

sequenceDiagram
    participant C as Client
    participant S as HTTP Search API Server
    C->>S: HTTP GET /search?q=example
    Note over S: Process query
    S->>C: 200 OK (JSON/XML Response)

Examples

Example 1: Basic Search Request

  • Request: 
    GET /api/search?q=wireless+headphones&sort=price&order=asc HTTP/1.1
Host: api.example.com
  • Response: 
    {
    "results": [
        {
            "product_id": "12345",
            "name": "Budget Wireless Headphones",
            "price": 45.99,
            "currency": "USD",
            "availability": "In stock"
        },
        {
            "product_id": "12346",
            "name": "Premium Wireless Headphones",
            "price": 99.99,
            "currency": "USD",
            "availability": "In stock"
        }
    ],
    "total": 2,
    "page": 1,
    "pages": 1
}

Example 2: Advanced Search with Filters

  • Request: 
    GET /api/search?q=smartphone&filters=brand:Samsung;storage:256GB&sort=price&order=desc HTTP/1.1
Host: api.example.com
  • Response: 
    {
    "results": [
        {
            "product_id": "78910",
            "name": "Samsung Galaxy S22",
            "price": 799.99,
            "currency": "USD",
            "availability": "Pre-order"
        },
        {
            "product_id": "78911",
            "name": "Samsung Galaxy S21",
            "price": 699.99,
            "currency": "USD",
            "availability": "In stock"
        }
    ],
    "total": 2,
    "page": 1,
    "pages": 1
}

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