/**
 * https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers#controls
 */
export declare enum HttpHeaderCodes {
    X_Opra_Version = "X-Opra-Version",
    X_Total_Count = "X-Total-Count",
    /**
     * Defines the authentication method that should be used to access a resource.
     */
    WWW_Authenticate = "WWW-Authenticate",
    /**
     * Contains the credentials to authenticate a user-agent with a server.
     */
    Authorization = "Authorization",
    /**
     * Defines the authentication method that should be used to access a resource behind a proxy server.
     */
    Proxy_Authenticate = "Proxy-Authenticate",
    /**
     * Contains the credentials to authenticate a user agent with a proxy server.
     */
    Proxy_Authorization = "Proxy-Authorization",
    /**
     * The time, in seconds, that the object has been in a proxy cache.
     */
    Age = "Age",
    /**
     * Directives for caching mechanisms in both requests and responses.
     */
    Cache_Control = "Cache-Control",
    /**
     * Clears browsing data (e.g. cookies, storage, cache) associated with the requesting website.
     */
    Clear_Site_Data = "Clear-Site-Data",
    /**
     * The date/time after which the response is considered stale.
     */
    Expires = "Expires",
    /**
     * Implementation-specific header that may have various effects anywhere along the request-response chain.
     * Used for backwards compatibility with HTTP/1.0 caches where the Cache-Control header is not yet present.
     */
    Pragma = "Pragma",
    /**
     * The last modification date of the resource, used to compare several versions of the same resource.
     * It is less accurate than ETag, but easier to calculate in some environments.
     * Conditional requests using If-Modified-Since and If-Unmodified-Since
     * use this value to change the behavior of the request.
     */
    Last_Modified = "Last-Modified",
    /**
     * A unique string identifying the version of the resource.
     * Conditional requests using If-Match and If-None-Match use this value to change the behavior of the request.
     */
    ETag = "ETag",
    /**
     * Makes the request conditional, and applies the method only if the stored resource matches one of the given ETags.
     */
    If_Match = "If-Match",
    /**
     * Makes the request conditional, and applies the method only if the stored resource doesn't match
     * any of the given ETags. This is used to update caches (for safe requests), or to prevent uploading
     * a new resource when one already exists.
     */
    If_None_Match = "If-None-Match",
    /**
     * Makes the request conditional, and expects the resource to be transmitted only if it has been modified
     * after the given date. This is used to transmit data only when the cache is out of date.
     */
    If_Modified_Since = "If-Modified-Since",
    /**
     * Makes the request conditional, and expects the resource to be transmitted only if
     * it has not been modified after the given date. This ensures the coherence of a new
     * fragment of a specific range with previous ones, or to implement an optimistic
     * concurrency control system when modifying existing documents.
     */
    If_Unmodified_Since = "If-Unmodified-Since",
    /**
     * Determines how to match request headers to decide whether a cached response can be used
     * rather than requesting a fresh one from the origin server.
     */
    Vary = "Vary",
    /**
     * Controls whether the network connection stays open after the current transaction finishes.
     */
    Connection = "Connection",
    /**
     * Controls how long a persistent connection should stay open.
     */
    Keep_Alive = "Keep-Alive",
    /**
     * Informs the server about the types of data that can be sent back.
     */
    Accept = "Accept",
    /**
     * The encoding algorithm, usually a compression algorithm, that can be used on the resource sent back.
     */
    Accept_Encoding = "Accept-Encoding",
    /**
     * Informs the server about the human language the server is expected to send back.
     * This is a hint and is not necessarily under the full control of the user:
     * the server should always pay attention not to override an explicit user choice
     * (like selecting a language from a dropdown).
     */
    Accept_Language = "Accept-Language",
    /**
     * Indicates expectations that need to be fulfilled by the server to properly handle the request.
     */
    Expect = "Expect",
    /**
     * Contains stored HTTP cookies previously sent by the server with the Set-Cookie header.
     */
    Cookie = "Cookie",
    /**
     * Send cookies from the server to the user-agent.
     */
    Set_Cookie = "Set-Cookie",
    /**
     * Indicates whether the response can be shared.
     */
    Access_Control_Allow_Origin = "Access-Control-Allow-Origin",
    /**
     * Indicates whether the response to the request can be exposed when the credentials flag is true.
     */
    Access_Control_Allow_Credentials = "Access-Control-Allow-Credentials",
    /**
     * Used in response to a preflight request to indicate which HTTP headers can be used when making the actual request.
     */
    Access_Control_Allow_Headers = "Access-Control-Allow-Headers",
    /**
     * Specifies the methods allowed when accessing the resource in response to a preflight request.
     */
    Access_Control_Allow_Methods = "Access-Control-Allow-Methods",
    /**
     * Indicates which headers can be exposed as part of the response by listing their names.
     */
    Access_Control_Expose_Headers = "Access-Control-Expose-Headers",
    /**
     * Indicates how long the results of a preflight request can be cached.
     */
    Access_Control_Max_Age = "Access-Control-Max-Age",
    /**
     * Used when issuing a preflight request to let the server know which HTTP headers will be
     * used when the actual request is made.
     */
    Access_Control_Request_Headers = "Access-Control-Request-Headers",
    /**
     * Used when issuing a preflight request to let the server know which HTTP method
     * will be used when the actual request is made.
     */
    Access_Control_Request_Method = "Access-Control-Request-Method",
    /**
     * Indicates where a fetch originates from.
     */
    Origin = "Origin",
    /**
     * Specifies origins that are allowed to see values of attributes retrieved via features of the Resource Timing API,
     * which would otherwise be reported as zero due to cross-origin restrictions.
     */
    Timing_Allow_Origin = "Timing-Allow-Origin",
    /**
     * Indicates if the resource transmitted should be displayed inline (default behavior without the header),
     * or if it should be handled like a download and the browser should present a "Save As" dialog.
     */
    Content_Disposition = "Content-Disposition",
    /**
     * Indicates to uniquely identifies MIME entities in several contexts.
     */
    Content_ID = "Content-ID",
    /**
     * The size of the resource, in decimal number of bytes.
     */
    Content_Length = "Content-Length",
    /**
     * Indicates the media type of the resource.
     */
    Content_Type = "Content-Type",
    /**
     * Indicates to specify how a MIME message or body part has been encoded,
     * so that it can be decoded by its recipient.
     */
    Content_Transfer_Encoding = "Content-Transfer-Encoding",
    /**
     * Used to specify the compression algorithm.
     */
    Content_Encoding = "Content-Encoding",
    /**
     * Describes the human language(s) intended for the audience, so that it allows a user to
     * differentiate according to the users' own preferred language.
     */
    Content_Language = "Content-Language",
    /**
     * Indicates an alternate location for the returned data.
     */
    Content_Location = "Content-Location",
    /**
     * Contains information from the client-facing side of proxy servers that is altered or
     * lost when a proxy is involved in the path of the request.
     */
    Forwarded = "Forwarded",
    /**
     * Identifies the originating IP addresses of a client connecting to a web server
     * through an HTTP proxy or a load balancer.
     */
    X_Forwarded_For = "X-Forwarded-For",
    /**
     * Identifies the original host requested that a client used to connect to your proxy or load balancer.
     */
    X_Forwarded_Host = "X-Forwarded-Host",
    /**
     * Identifies the protocol (HTTP or HTTPS) that a client used to connect to your proxy or load balancer.
     */
    X_Forwarded_Proto = "X-Forwarded-Proto",
    /**
     * Added by proxies, both forward and reverse proxies, and can appear in the request headers and the response headers.
     */
    Via = "Via",
    /**
     * Indicates the URL to redirect a page to.
     */
    Location = "Location",
    /**
     * Contains an Internet email address for a human user who controls the requesting user agent.
     */
    From = "From",
    /**
     * Specifies the domain name of the server (for virtual hosting), and (optionally)
     * the TCP port number on which the server is listening.
     */
    Host = "Host",
    /**
     * The address of the previous web page from which a link to the currently requested page was followed.
     */
    Referer = "Referer",
    /**
     * Governs which referrer information sent in the Referer header should be included with requests made.
     */
    Referrer_Policy = "Referrer-Policy",
    /**
     * Contains a characteristic string that allows the network protocol peers to identify the application type,
     * operating system, software vendor or software version of the requesting software user agent.
     */
    User_Agent = "User-Agent",
    /**
     * Lists the set of HTTP request methods supported by a resource.
     */
    Allow = "Allow",
    /**
     * Contains information about the software used by the origin server to handle the request.
     */
    Server = "Server",
    /**
     * Indicates if the server supports range requests, and if so in which unit the range can be expressed.
     */
    Accept_Ranges = "Accept-Ranges",
    /**
     * Indicates the part of a document that the server should return.
     */
    Range = "Range",
    /**
     * Creates a conditional range request that is only fulfilled if the given etag or date matches
     * the remote resource. Used to prevent downloading two ranges from incompatible version of the resource.
     */
    If_Range = "If-Range",
    /**
     * Indicates where in a full body message a partial message belongs.
     */
    Content_Range = "Content-Range",
    /**
     * Allows a server to declare an embedder policy for a given document.
     */
    Cross_Origin_Embedder_Policy = "Cross-Origin-Embedder-Policy",
    /**
     * Prevents other domains from opening/controlling a window.
     */
    Cross_Origin_Opener_Policy = "Cross-Origin-Opener-Policy",
    /**
     * Prevents other domains from reading the response of the resources to which this header is applied.
     */
    Cross_Origin_Resource_Policy = "Cross-Origin-Resource-Policy",
    /**
     * Controls resources the user agent is allowed to load for a given page.
     */
    Content_Security_Policy = "Content-Security-Policy",
    /**
     * Allows web developers to experiment with policies by monitoring, but not enforcing, their effects.
     * These violation reports consist of JSON documents sent via an HTTP POST request to the specified URI.
     */
    Content_Security_Policy_Report_Only = "Content-Security-Policy-Report-Only",
    /**
     * Allows sites to opt in to reporting and/or enforcement of Certificate Transparency requirements,
     * which prevents the use of misissued certificates for that site from going unnoticed.
     * When a site enables the Expect-CT header, they are requesting that Chrome check that
     * any certificate for that site appears in public CT logs.
     */
    Expect_CT = "Expect-CT",
    /**
     * Provides a mechanism to allow and deny the use of browser features in its own frame,
     * and in iframes that it embeds.
     */
    Feature_Policy = "Feature-Policy",
    /**
     * Force communication using HTTPS instead of HTTP.
     */
    Strict_Transport_Security = "Strict-Transport-Security",
    /**
     *
     */
    Upgrade = "Upgrade",
    /**
     * Sends a signal to the server expressing the client's preference for an encrypted and authenticated response,
     * and that it can successfully handle the upgrade-insecure-requests directive.
     */
    Upgrade_Insecure_Requests = "Upgrade-Insecure-Requests",
    /**
     * Disables MIME sniffing and forces browser to use the type given in Content-Type.
     */
    X_Content_Type_Options = "X-Content-Type-Options",
    /**
     * The X-Download-Options HTTP header indicates that the browser (Internet Explorer)
     * should not display the option to "Open" a file that has been downloaded from an application,
     * to prevent phishing attacks as the file otherwise would gain access to execute in the context of the application.
     */
    X_Download_Options = "X-Download-Options",
    /**
     * Indicates whether a browser should be allowed to render a page in a <frame>, <iframe>, <embed> or <object>.
     */
    X_Frame_Options = "X-Frame-Options",
    /**
     * Specifies if a cross-domain policy file (crossdomain.xml) is allowed.
     * The file may define a policy to grant clients, such as Adobe's Flash Player (now obsolete),
     * Adobe Acrobat, Microsoft Silverlight (now obsolete), or Apache Flex,
     * permission to handle data across domains that would otherwise be restricted
     * due to the Same-Origin Policy. See the Cross-domain Policy File Specification for more information.
     */
    X_Permitted_Cross_Domain_Policies = "X-Permitted-Cross-Domain-Policies",
    /**
     * May be set by hosting environments or other frameworks and contains information about
     * them while not providing any usefulness to the application or its visitors.
     * Unset this header to avoid exposing potential vulnerabilities.
     */
    X_Powered_By = "X-Powered-By",
    /**
     * Enables cross-site scripting filtering.
     */
    X_XSS_Protection = "X-XSS-Protection",
    /**
     * Specifies the form of encoding used to safely transfer the resource to the user.
     */
    Transfer_Encoding = "Transfer-Encoding",
    /**
     * Specifies the transfer encodings the user agent is willing to accept.
     */
    TE = "TE",
    /**
     * Allows the sender to include additional fields at the end of chunked message.
     */
    Trailer = "Trailer",
    Sec_WebSocket_Key = "Sec-WebSocket-Key",
    Sec_WebSocket_Extensions = "Sec-WebSocket-Extensions",
    Sec_WebSocket_Accept = "Sec-WebSocket-Accept",
    Sec_WebSocket_Protocol = "Sec-WebSocket-Protocol",
    Sec_WebSocket_Version = "Sec-WebSocket-Version",
    /**
     * Contains the date and time at which the message was originated.
     */
    Date = "Date",
    /**
     * Indicates how long the user agent should wait before making a follow-up request.
     */
    Retry_After = "Retry-After",
    /**
     * Communicates one or more metrics and descriptions for the given request-response cycle.
     */
    Server_Timing = "Server-Timing",
    /**
     * Controls DNS prefetching, a feature by which browsers proactively perform domain name
     * resolution on both links that the user may choose to follow as well as URLs for items
     * referenced by the document, including images, CSS, JavaScript, and so forth.
     */
    X_DNS_Prefetch_Control = "X-DNS-Prefetch-Control",
    /**
     *
     */
    Max_Forwards = "Max-Forwards"
}