On Request Header

Called by the µC/HTTPc core to allow the application to include a Header Field to the ongoing HTTP Request.

The parameter HTTPc_PARAM_TYPE_REQ_HDR_HOOK must be set up using the function HTTPc_ReqSetParam() for the hook function to be called.

Prototype

CPU_BOOLEAN  HTTPc_ReqHdrHook (HTTPc_CONN_OBJ   *p_conn_obj,
                               HTTPc_REQ_OBJ    *p_req_obj,
                               HTTP_HDR        **p_hdr);

Arguments

p_conn_obj

Pointer to the current HTTPc Connection Object.

p_req_obj

Pointer to the current HTTPc Request Object.

p_hdr

Variable that will received the pointer to the header field to include in the HTTP request.

Return Values

DEF_YES, if all the header fields have been passed by the application.

DEF_NO, if header fields remain to be passed by the application (Hook function will be called again).

Required Configuration

The HTTPc_CFG_HDR_TX_EN configuration macro MUST be enabled.

Notes / Warnings

The header field object MUST stay valid until the HTTP transaction is completed.

Example Template

Listing - Request Header Callback Function Example Code

#define  HTTPc_HDR_VAL_LEN_MAX          10

HTTPc_HDR  HTTPc_ReqHdr;
CPU_CHAR   HTTPc_ReqHdrValStr[HTTPc_HDR_VAL_LEN_MAX];


static  CPU_BOOLEAN  HTTPc_ReqHdrHook (HTTPc_CONN_OBJ   *p_conn,
                                       HTTPc_REQ_OBJ    *p_req,
                                       HTTPc_HDR       **p_hdr)
{
	HTTPc_HDR  *p_hdr_tmp;


    p_hdr_tmp         = &HTTPc_ReqHdr;
    p_hdr_tmp->ValPtr = &HTTPc_ReqHdrValStr[0];

    p_hdr_tmp->HdrField = HTTP_HDR_FIELD_COOKIE;
    Str_Copy_N(p_hdr_tmp->ValPtr, "ID=234668", HTTPc_HDR_VAL_LEN_MAX);
    p_hdr_tmp->ValLen   = Str_Len_N(p_hdr_tmp->ValPtr, HTTPc_HDR_VAL_LEN_MAX);

   *p_hdr = p_hdr_tmp;

    return (DEF_YES);
}