📪 Headers

// Request and Response Headers
// https://en.wikipedia.org/wiki/List_of_HTTP_header_fields
const (
    // CacheControl
    // Used to specify directives that must be obeyed by all caching mechanisms along the request-response chain.
    //
    //  Cache-Control: no-cache
    CacheControl = "Cache-Control"

    // Connection
    // Control options for the current connection and list of hop-by-hop request fields. Must not be used with HTTP/2.
    //
    //  Connection: keep-alive
    //  Connection: Upgrade
    Connection = "Connection"

    // ContentEncoding
    // The type of encoding used on the data. See HTTP compression.
    //
    //  Content-Encoding: gzip
    ContentEncoding = "Content-Encoding"

    // ContentLength
    // The length of the request body in octets (8-bit bytes).
    //
    //  Content-Length: 348
    ContentLength = "Content-Length"

    // ContentMd5
    // A Base64-encoded binary MD5 sum of the content of the request body.
    //
    //  Content-MD5: Q2hlY2sgSW50ZWdyaXR5IQ==
    ContentMd5 = "Content-MD5"

    // ContentType
    // The Media type of the body of the request (used with POST and PUT s).
    //
    //  Content-Type: application/x-www-form-urlencoded
    ContentType = "Content-Type"

    // Date
    // The date and time at which the message was originated (in "HTTP-date" bind as defined by RFC 7231 Date/Time Formats).
    //
    //  Date: Tue, 15 Nov 1994 08:12:31 GMT
    Date = "Date"

    // Pragma
    // Implementation-specific fields that may have various effects anywhere along the request-response chain.
    //
    //  Pragma: no-cache
    Pragma = "Pragma"

    // Trailer
    // The Trailer general field value indicates that the given set of header fields is present in the trailer of a message encoded with chunked transfer coding.
    //
    //  Trailer: Max-Forwards
    Trailer = "Trailer"

    // TransferEncoding
    // The form of encoding used to safely transfer the entity to the user. Currently defined methods are: chunked, compress, deflate, gzip, identity. Must not be used with HTTP/2.
    //
    //  Transfer-Encoding: chunked
    TransferEncoding = "Transfer-Encoding"

    // Upgrade
    // Ask the server to upgrade to another protocol. Must not be used in HTTP/2.
    //
    //  Upgrade: h2c, HTTPS/1.3, IRC/6.9, RTA/x11, websocket
    Upgrade = "Upgrade"

    // Via
    // Informs the server of proxies through which the request was sent.
    //
    //  Via: 1.0 fred, 1.1 example.com (Apache/1.1)
    Via = "Via"

    // Warning
    // A general warning about possible problems with the entity body.
    //
    //  Warning: 199 Miscellaneous warning
    Warning = "Warning"
)