This documentation is for the TIP (development tree) of NNG and may represent unreleased changes or functionality that is experimental, and is subject to change before release. The latest released version is v1.3.2. See the documentation for v1.3.2 for the most up-to-date information.

nng_http_res_set_status(3http)

NAME

nng_http_res_set_status - set HTTP response status

SYNOPSIS

#include <nng/nng.h>
#include <nng/supplemental/http/http.h>

int nng_http_res_set_status(nng_http_res *res, uint16_t status);

DESCRIPTION

The nng_http_res_set_status() sets the numeric HTTP status code associated with the response res to status. The default value for a newly allocated response is 200 (NNG_HTTP_STATUS_OK).

The status is not verified, so the caller should take care to ensure that only a valid code is supplied.

For convenience, a number of predefined symbols are available.

enum {
    NNG_HTTP_STATUS_CONTINUE                 = 100,
    NNG_HTTP_STATUS_SWITCHING                = 101,
    NNG_HTTP_STATUS_PROCESSING               = 102,
    NNG_HTTP_STATUS_OK                       = 200,
    NNG_HTTP_STATUS_CREATED                  = 201,
    NNG_HTTP_STATUS_ACCEPTED                 = 202,
    NNG_HTTP_STATUS_NOT_AUTHORITATIVE        = 203,
    NNG_HTTP_STATUS_NO_CONTENT               = 204,
    NNG_HTTP_STATUS_RESET_CONTENT            = 205,
    NNG_HTTP_STATUS_PARTIAL_CONTENT          = 206,
    NNG_HTTP_STATUS_MULTI_STATUS             = 207,
    NNG_HTTP_STATUS_ALREADY_REPORTED         = 208,
    NNG_HTTP_STATUS_IM_USED                  = 226,
    NNG_HTTP_STATUS_MULTIPLE_CHOICES         = 300,
    NNG_HTTP_STATUS_STATUS_MOVED_PERMANENTLY = 301,
    NNG_HTTP_STATUS_FOUND                    = 302,
    NNG_HTTP_STATUS_SEE_OTHER                = 303,
    NNG_HTTP_STATUS_NOT_MODIFIED             = 304,
    NNG_HTTP_STATUS_USE_PROXY                = 305,
    NNG_HTTP_STATUS_TEMPORARY_REDIRECT       = 307,
    NNG_HTTP_STATUS_PERMANENT_REDIRECT       = 308,
    NNG_HTTP_STATUS_BAD_REQUEST              = 400,
    NNG_HTTP_STATUS_UNAUTHORIZED             = 401,
    NNG_HTTP_STATUS_PAYMENT_REQUIRED         = 402,
    NNG_HTTP_STATUS_FORBIDDEN                = 403,
    NNG_HTTP_STATUS_NOT_FOUND                = 404,
    NNG_HTTP_STATUS_METHOD_NOT_ALLOWED       = 405,
    NNG_HTTP_STATUS_NOT_ACCEPTABLE           = 406,
    NNG_HTTP_STATUS_PROXY_AUTH_REQUIRED      = 407,
    NNG_HTTP_STATUS_REQUEST_TIMEOUT          = 408,
    NNG_HTTP_STATUS_CONFLICT                 = 409,
    NNG_HTTP_STATUS_GONE                     = 410,
    NNG_HTTP_STATUS_LENGTH_REQUIRED          = 411,
    NNG_HTTP_STATUS_PRECONDITION_FAILED      = 412,
    NNG_HTTP_STATUS_PAYLOAD_TOO_LARGE        = 413,
    NNG_HTTP_STATUS_ENTITY_TOO_LONG          = 414,
    NNG_HTTP_STATUS_UNSUPPORTED_MEDIA_TYPE   = 415,
    NNG_HTTP_STATUS_RANGE_NOT_SATISFIABLE    = 416,
    NNG_HTTP_STATUS_EXPECTATION_FAILED       = 417,
    NNG_HTTP_STATUS_TEAPOT                   = 418,
    NNG_HTTP_STATUS_UNPROCESSABLE_ENTITY     = 422,
    NNG_HTTP_STATUS_LOCKED                   = 423,
    NNG_HTTP_STATUS_FAILED_DEPENDENCY        = 424,
    NNG_HTTP_STATUS_UPGRADE_REQUIRED         = 426,
    NNG_HTTP_STATUS_PRECONDITION_REQUIRED    = 428,
    NNG_HTTP_STATUS_TOO_MANY_REQUESTS        = 429,
    NNG_HTTP_STATUS_HEADERS_TOO_LARGE        = 431,
    NNG_HTTP_STATUS_UNAVAIL_LEGAL_REASONS    = 451,
    NNG_HTTP_STATUS_INTERNAL_SERVER_ERROR    = 500,
    NNG_HTTP_STATUS_NOT_IMPLEMENTED          = 501,
    NNG_HTTP_STATUS_BAD_GATEWAY              = 502,
    NNG_HTTP_STATUS_SERVICE_UNAVAILABLE      = 503,
    NNG_HTTP_STATUS_GATEWAY_TIMEOUT          = 504,
    NNG_HTTP_STATUS_HTTP_VERSION_NOT_SUPP    = 505,
    NNG_HTTP_STATUS_VARIANT_ALSO_NEGOTIATES  = 506,
    NNG_HTTP_STATUS_INSUFFICIENT_STORAGE     = 507,
    NNG_HTTP_STATUS_LOOP_DETECTED            = 508,
    NNG_HTTP_STATUS_NOT_EXTENDED             = 510,
    NNG_HTTP_STATUS_NETWORK_AUTH_REQUIRED    = 511,
};

Please see the relevant HTTP RFCs for the semantics and correct use of these status codes.

It is a good idea to also set the reason message with nng_http_set_reason(). This will help any humans who may have to diagnose a failure.

RETURN VALUES

This function returns 0 on success, and non-zero otherwise.

ERRORS

NNG_ENOTSUP

No support for HTTP in the library.

SEE ALSO