Tag

Request

23 resources tagged Request across methods, status codes, headers, cookies, guides, and glossary.

Accept Header

Learn how the Accept header tells servers which content types (JSON, HTML, XML) your client can handle. Master content negotiation and quality values.

HTTP Headers

Accept-Encoding Header

Learn how Accept-Encoding tells servers which compression formats (gzip, br, deflate) your client supports to reduce bandwidth and speed up page loads.

HTTP Headers

Accept-Language Header

Learn how the Accept-Language header tells servers which languages your client prefers for localized content. Understand language tags and quality values.

HTTP Headers

Access-Control-Request-Headers Header

Learn how Access-Control-Request-Headers tells servers which custom headers will be used in CORS requests. Essential for preflight request handling.

HTTP Headers

Access-Control-Request-Method Header

Learn how Access-Control-Request-Method tells servers which HTTP method will be used in the actual CORS request. Essential for preflight request handling.

HTTP Headers

Connection Header

Learn how the Connection header controls whether HTTP connections stay open (keep-alive) or close after each request. Optimize with persistent connections.

HTTP Headers

Content-Type Header: Complete Guide to MIME Types

Learn how the Content-Type header works. Understand MIME types, charset encoding, and how to set the correct content type for APIs, forms, and file uploads.

HTTP Headers

Cookie Header

Learn how the Cookie header sends stored cookies to servers with each request. Understand cookie transmission, session management, and security considerations.

HTTP Headers

Forwarded

Learn how the Forwarded header preserves original client information (IP, protocol, host) that would otherwise be lost when requests pass through proxies.

HTTP Headers

Host Header

Learn how the Host header specifies the target server domain name and port for HTTP requests. Essential for virtual hosting and routing on shared servers.

HTTP Headers

If-Match Header

Learn how the If-Match header makes requests conditional based on ETag matching. Prevent conflicts and lost updates in concurrent editing scenarios.

HTTP Headers

If-Modified-Since Header

Learn how the If-Modified-Since header requests resources only if modified since a specific date. Reduce bandwidth with efficient conditional caching.

HTTP Headers

If-None-Match Header

Learn how the If-None-Match header makes conditional requests using ETags. Avoid downloading unchanged resources and reduce bandwidth with cache validation.

HTTP Headers

If-Range Header

Learn how the If-Range header requests partial content only if the resource is unchanged. Efficiently resume downloads without re-fetching entire files.

HTTP Headers

If-Unmodified-Since Header

Learn how the If-Unmodified-Since header makes requests conditional on resources not being modified. Prevent conflicts in concurrent update scenarios.

HTTP Headers

Origin Header

Learn how the Origin header identifies where cross-origin requests come from. Essential for CORS security policies and preventing cross-site request forgery.

HTTP Headers

Proxy-Authorization Header

Learn how Proxy-Authorization provides credentials to access resources through a proxy server. Understand proxy authentication schemes and security.

HTTP Headers

Range Header

Learn how the Range header requests partial content from servers to enable resumable downloads, video streaming, and efficient large file transfers.

HTTP Headers

Referer Header

Learn how the Referer header tells servers which page led to the current request. Understand its use in analytics, security, and privacy implications.

HTTP Headers

Sec-WebSocket-Key

Learn how the Sec-WebSocket-Key header provides a random key for WebSocket handshake validation. Understand the upgrade process and security implications.

HTTP Headers

User-Agent Header

Learn how the User-Agent header identifies the client software, browser, or application making HTTP requests. Understand user agent strings and best practices.

HTTP Headers

X-Forwarded-For

Learn how X-Forwarded-For identifies the original client IP when requests pass through proxies or load balancers. Essential for logging and security.

HTTP Headers

X-Forwarded-Proto

Learn how the X-Forwarded-Proto header identifies the original protocol (HTTP/HTTPS) used by clients connecting through proxies or load balancers.