Function send_response_header

modules/arch/win32/mod_isapi.c:625–805

Common code invoked for both HSE_REQ_SEND_RESPONSE_HEADER and * the newer HSE_REQ_SEND_RESPONSE_HEADER_EX ServerSupportFunction(s) * as well as other functions that write responses and presume that * the support functions above are optional. * * Other callers trying to split headers and body bytes should pass * head/headlen alone (leaving stat/statlen NULL/0), so that they * get a proper co

 * isn't counted as the head bytes are.
 */
static apr_ssize_t send_response_header(isapi_cid *cid,
                                        const char *stat,
                                        const char *head,
                                        apr_size_t statlen,
                                        apr_size_t headlen)
{
    int head_present = 1;
    int termarg;
    int res;
    int old_status;
    const char *termch;
    apr_size_t ate = 0;

    if (!head || headlen == 0 || !*head) {
        head = stat;
        stat = NULL;
        headlen = statlen;
        statlen = 0;
        head_present = 0; /* Don't eat the header */
    }

    if (!stat || statlen == 0 || !*stat) {
        if (head && headlen && *head && ((stat = memchr(head, '\r', headlen))
                                      || (stat = memchr(head, '\n', headlen))
                                      || (stat = memchr(head, '\0', headlen))
                                      || (stat = head + headlen))) {
            statlen = stat - head;
            if (memchr(head, ':', statlen)) {
                stat = "Status: 200 OK";
                statlen = strlen(stat);
            }
            else {
                const char *flip = head;
                head = stat;
                stat = flip;
                headlen -= statlen;
                ate += statlen;
                if (*head == '\r' && headlen)
                    ++head, --headlen, ++ate;
                if (*head == '\n' && headlen)
                    ++head, --headlen, ++ate;
            }
        }
    }

    if (stat && (statlen > 0) && *stat) {
        char *newstat;
        if (!apr_isdigit(*stat)) {
            const char *stattok = stat;
            int toklen = statlen;
            while (toklen && *stattok && !apr_isspace(*stattok)) {
                ++stattok; --toklen;
            }
            while (toklen && apr_isspace(*stattok)) {
                ++stattok; --toklen;
            }
            /* Now decide if we follow the xxx message
             * or the http/x.x xxx message format