• HTTP 1.1 Reference (RFC 2616)
  • HTTP 1.1 Reference (RFC 2616)
  • Introduction
    • Introduction
    • Purpose
    • Requirements
    • Terminology
    • Overall Operation
  • Notational Conventions and Generic Grammar
    • Notational Conventions and Generic Grammar
    • Augmented BNF
    • Basic Rules
  • Protocol Parameters
    • Protocol Parameters
    • HTTP Version
    • Uniform Resource Identifiers
    • Date/Time Formats
    • Character Sets
    • Content Codings
    • Transfer Codings
    • Media Types
    • Product Tokens
    • Quality Values
    • Language Tags
    • Entity Tags
    • Range Units
  • HTTP Message
    • HTTP Message
    • Message Types
    • Message Headers
    • Message Body
    • Message Length
    • General Header Fields
  • Request
    • Request
    • Request-Line
    • Request Header Fields
    • The Resource Identified by a Request
  • Response
    • Response
    • Status-Line
    • Response Header Fields
  • Entity
    • Entity
    • Entity Header Fields
    • Entity Body
  • Connections
    • Connections
    • Persistent Connections
    • Message Transmission Requirements
  • Method Definitions
    • Method Definitions
    • Safe and Idempotent Methods
    • OPTIONS
    • GET
    • HEAD
    • POST
    • PUT
    • DELETE
    • TRACE
    • CONNECT
  • Status Code Definitions
    • Status Code Definitions
    • Informational 1xx
      • Informational 1xx
      • 100 Continue
      • 101 Switching Protocols
    • Successful 2xx
      • Successful 2xx
      • 200 OK
      • 201 Created
      • 202 Accepted
      • 203 Non-Authoritative Information
      • 204 No Content
      • 205 Reset Content
      • 206 Partial Content
    • Redirection 3xx
      • Redirection 3xx
      • 300 Multiple Choices
      • 301 Moved Permanently
      • 302 Found
      • 303 See Other
      • 304 Not Modified
      • 305 Use Proxy
      • 306 (Unused)
      • 307 Temporary Redirect
    • Client Error 4xx
      • Client Error 4xx
      • 400 Bad Request
      • 401 Unauthorized
      • 402 Payment Required
      • 403 Forbidden
      • 404 Not Found
      • 405 Method Not Allowed
      • 406 Not Acceptable
      • 407 Proxy Authentication Required
      • 408 Request Timeout
      • 409 Conflict
      • 410 Gone
      • 411 Length Required
      • 412 Precondition Failed
      • 413 Request Entity Too Large
      • 414 Request-URI Too Long
      • 415 Unsupported Media Type
      • 416 Requested Range Not Satisfiable
      • 417 Expectation Failed
    • Server Error 5xx
      • Server Error 5xx
      • 500 Internal Server Error
      • 501 Not Implemented
      • 502 Bad Gateway
      • 503 Service Unavailable
      • 504 Gateway Timeout
      • 505 HTTP Version Not Supported
  • Access Authentication
  • Content Negotiation
    • Content Negotiation
    • Server-driven Negotiation
    • Agent-driven Negotiation
    • Transparent Negotiation
  • Caching in HTTP
    • Caching in HTTP
    • Caching in HTTP
    • Expiration Model
    • Validation Model
    • Response Cacheability
    • Constructing Responses From Caches
    • Caching Negotiated Responses
    • Shared and Non-Shared Caches
    • Errors or Incomplete Response Cache Behavior
    • Side Effects of GET and HEAD
    • Invalidation After Updates or Deletions
    • Write-Through Mandatory
    • Cache Replacement
    • History Lists
  • Header Field Definitions
    • Header Field Definitions
    • Accept
    • Accept-Charset
    • Accept-Encoding
    • Accept-Language
    • Accept-Ranges
    • Age
    • Allow
    • Authorization
    • Cache-Control
    • Connection
    • Content-Encoding
    • Content-Language
    • Content-Length
    • Content-Location
    • Content-MD5
    • Content-Range
    • Content-Type
    • Date
    • ETag
    • Expect
    • Expires
    • From
    • Host
    • If-Match
    • If-Modified-Since
    • If-None-Match
    • If-Range
    • If-Unmodified-Since
    • Last-Modified
    • Location
    • Max-Forwards
    • Pragma
    • Proxy-Authenticate
    • Proxy-Authorization
    • Range
    • Referer
    • Retry-After
    • Server
    • TE
    • Trailer
    • Transfer-Encoding
    • Upgrade
    • User-Agent
    • Vary
    • Via
    • Warning
    • WWW-Authenticate
  • Security Considerations
    • Security Considerations
    • Personal Information
    • Attacks Based On File and Path Names
    • DNS Spoofing
    • Location Headers and Spoofing
    • Content-Disposition Issues
    • Authentication Credentials and Idle Clients
    • Proxies and Caching
  • Acknowledgments
  • References
  • Authors' Addresses
  • Appendices
    • Appendices
    • Internet Media Type message/http and application/http
    • Compatibility with Previous Versions
    • Internet Media Type multipart/byteranges
    • Tolerant Applications
    • Differences Between HTTP Entities and RFC 2045 Entities
    • Additional Features
  • Full Copyright Statement
• Cookies