{
    "api": "YAML JSON TOON Database",
    "version": "1.0.0",
    "format": "json",
    "dataset": {
        "slug": "http-request-headers",
        "title": "HTTP Request Headers",
        "description": "Common HTTP request headers and their purposes.",
        "summary": "Common HTTP request headers with a description and an example value: Accept, Accept-Language, Accept-Encoding, Authorization, Cache-Control, Content-Type, Cookie, Host and User-Agent, plus Origin, Referer, Range, conditional headers and proxy headers.",
        "use_when": [
            "You need the purpose and format of a request header.",
            "You are debugging a request in browser developer tools."
        ],
        "caveats": [
            "Some headers can be set only by the browser; scripts cannot set forbidden header names.",
            "X-Forwarded-For can be spoofed by clients unless a trusted proxy overwrites it."
        ],
        "related": [
            "http-response-headers",
            "http-content-negotiation",
            "http-authentication-methods",
            "http-cors-guide"
        ],
        "category": "Web Technologies",
        "category_slug": "web-technologies",
        "tags": "web,http,headers,request,api",
        "view_count": 0,
        "entry_count": 20,
        "fields": [
            {
                "section": "data",
                "field": "header",
                "type": "string",
                "example": "Accept"
            },
            {
                "section": "data",
                "field": "description",
                "type": "string",
                "example": "Content types the client can process."
            },
            {
                "section": "data",
                "field": "example",
                "type": "string",
                "example": "application/json, text/html"
            }
        ]
    },
    "data": [
        {
            "header": "Accept",
            "description": "Content types the client can process.",
            "example": "application/json, text/html"
        },
        {
            "header": "Accept-Language",
            "description": "Preferred languages for the response.",
            "example": "en-US, en;q=0.9"
        },
        {
            "header": "Accept-Encoding",
            "description": "Acceptable content encodings.",
            "example": "gzip, deflate, br"
        },
        {
            "header": "Authorization",
            "description": "Credentials for authentication.",
            "example": "Bearer eyJhbGci..."
        },
        {
            "header": "Cache-Control",
            "description": "Caching directives for request and response.",
            "example": "no-cache, max-age=3600"
        },
        {
            "header": "Content-Type",
            "description": "Media type of the request body.",
            "example": "application/json; charset=utf-8"
        },
        {
            "header": "Content-Length",
            "description": "Size of the request body in bytes.",
            "example": "1234"
        },
        {
            "header": "Cookie",
            "description": "Previously set cookies to send back to the server.",
            "example": "session_id=abc123"
        },
        {
            "header": "Host",
            "description": "Domain name of the server.",
            "example": "api.example.com"
        },
        {
            "header": "User-Agent",
            "description": "Client application identifier.",
            "example": "Mozilla/5.0 ..."
        },
        {
            "header": "X-Request-ID",
            "description": "Custom header for request tracing.",
            "example": "req-abc123def456"
        },
        {
            "header": "If-None-Match",
            "description": "Conditional request using ETag.",
            "example": "\"33a64df551425fcc55e4d42a148795d9f25f89d4\""
        },
        {
            "header": "Origin",
            "description": "The origin (scheme, host, port) that initiated a cross-origin or POST request.",
            "example": "https://example.com"
        },
        {
            "header": "Referer",
            "description": "The URL of the page that linked to the resource; the misspelling is historical.",
            "example": "https://example.com/page"
        },
        {
            "header": "Range",
            "description": "Asks for only part of a resource, used for resumable downloads and media seeking.",
            "example": "bytes=0-1023"
        },
        {
            "header": "If-Modified-Since",
            "description": "Conditional request that returns 304 Not Modified if the resource has not changed since the date.",
            "example": "Wed, 21 Oct 2015 07:28:00 GMT"
        },
        {
            "header": "If-Match",
            "description": "Makes a request conditional on the resource's ETag matching, used to avoid lost updates.",
            "example": "\"33a64df551425fcc\""
        },
        {
            "header": "X-Forwarded-For",
            "description": "De facto header listing the originating client IP and proxies a request passed through.",
            "example": "203.0.113.5, 198.51.100.7"
        },
        {
            "header": "Forwarded",
            "description": "Standardized header (RFC 7239) carrying proxy information such as the client address and protocol.",
            "example": "for=203.0.113.5;proto=https"
        },
        {
            "header": "Sec-Fetch-Site",
            "description": "Browser-set header indicating how the request's origin relates to the target, useful for blocking cross-site requests.",
            "example": "same-origin"
        }
    ]
}