+ free(tmp);
+}
+
+void simpleerror2(FILE *out, int code, char *msg, char *fmt, ...)
+{
+ va_list args;
+
+ va_start(args, fmt);
+ simpleerror2v(out, code, msg, fmt, args);
+ va_end(args);
+}
+
+void simpleerror(int fd, int code, char *msg, char *fmt, ...)
+{
+ va_list args;
+ FILE *out;
+
+ va_start(args, fmt);
+ out = fdopen(dup(fd), "w");
+ simpleerror2v(out, code, msg, fmt, args);
+ fclose(out);
+ va_end(args);
+}
+
+void stdredir(struct hthead *req, int fd, int code, char *dst)
+{
+ FILE *out;
+ char *sp, *cp, *ep, *qs, *path, *url, *adst, *proto, *host;
+
+ sp = strchr(dst, '/');
+ cp = strchr(dst, ':');
+ if(cp && (!sp || (cp < sp))) {
+ adst = sstrdup(dst);
+ } else {
+ proto = getheader(req, "X-Ash-Protocol");
+ host = getheader(req, "Host");
+ if((proto == NULL) || (host == NULL)) {
+ /* Not compliant, but there isn't a whole lot to be done
+ * about it. */
+ adst = sstrdup(dst);
+ } else {
+ if(*dst == '/') {
+ path = sstrdup(dst + 1);
+ } else {
+ if((*(url = req->url)) == '/')
+ url++;
+ if((ep = strchr(url, '?')) == NULL) {
+ ep = url + strlen(url);
+ qs = "";
+ } else {
+ qs = ep;
+ }
+ for(; (ep > url) && (ep[-1] != '/'); ep--);
+ path = sprintf2("%.*s%s%s", ep - url, url, dst, qs);
+ }
+ adst = sprintf2("%s://%s/%s", proto, host, path);
+ free(path);
+ }
+ }
+ out = fdopen(dup(fd), "w");
+ fprintf(out, "HTTP/1.1 %i Redirection\n", code);
+ fprintf(out, "Content-Length: 0\n");
+ fprintf(out, "Location: %s\n", adst);
+ fprintf(out, "\n");
+ fclose(out);
+ free(adst);
+}
+
+char *fmthttpdate(time_t time)
+{
+ /* I avoid using strftime, since it depends on locale settings. */
+ static char *days[] = {"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"};
+ static char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
+ "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
+ struct tm *tm;
+
+ tm = gmtime(&time);
+ return(sprintf3("%s, %i %s %i %02i:%02i:%02i GMT", days[(tm->tm_wday + 6) % 7], tm->tm_mday, months[tm->tm_mon], tm->tm_year + 1900, tm->tm_hour, tm->tm_min, tm->tm_sec));
+}
+
+static int gtoi(char *bstr, regmatch_t g)
+{
+ int i, n;
+
+ for(i = g.rm_so, n = 0; i < g.rm_eo; i++)
+ n = (n * 10) + (bstr[i] - '0');
+ return(n);
+}
+
+static int gstrcmp(char *bstr, regmatch_t g, char *str)
+{
+ if(g.rm_eo - g.rm_so != strlen(str))
+ return(1);
+ return(strncasecmp(bstr + g.rm_so, str, g.rm_eo - g.rm_so));
+}
+
+time_t parsehttpdate(char *date)
+{
+ static regex_t *spec = NULL;
+ static char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
+ "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
+ int i;
+ regmatch_t g[11];
+ struct tm tm;
+ int tz;
+
+ if(spec == NULL) {
+ omalloc(spec);
+ if(regcomp(spec, "^[A-Z]{3}, +([0-9]+) +([A-Z]{3}) +([0-9]+) +([0-9]{2}):([0-9]{2}):([0-9]{2}) +(([A-Z]+)|[+-]([0-9]{2})([0-9]{2}))$", REG_EXTENDED | REG_ICASE)) {
+ free(spec);
+ spec = NULL;
+ return(0);
+ }
+ }
+ if(regexec(spec, date, 11, g, 0))
+ return(0);
+ tm.tm_mday = gtoi(date, g[1]);
+ tm.tm_year = gtoi(date, g[3]) - 1900;
+ tm.tm_hour = gtoi(date, g[4]);
+ tm.tm_min = gtoi(date, g[5]);
+ tm.tm_sec = gtoi(date, g[6]);
+
+ tm.tm_mon = -1;
+ for(i = 0; i < 12; i++) {
+ if(!gstrcmp(date, g[2], months[i])) {
+ tm.tm_mon = i;
+ break;
+ }
+ }
+ if(tm.tm_mon < 0)
+ return(0);
+
+ if(g[8].rm_so > 0) {
+ if(!gstrcmp(date, g[8], "GMT"))
+ tz = 0;
+ else
+ return(0);
+ } else if((g[9].rm_so > 0) && (g[10].rm_so > 0)) {
+ tz = gtoi(date, g[9]) * 3600 + gtoi(date, g[10]) * 60;
+ if(date[g[7].rm_so] == '-')
+ tz = -tz;
+ } else {
+ return(0);
+ }
+
+ return(timegm(&tm) - tz);
+}
+
+char *httpdefstatus(int code)
+{
+ switch(code) {
+ case 200:
+ return("OK");
+ case 201:
+ return("Created");
+ case 202:
+ return("Accepted");
+ case 204:
+ return("No Content");
+ case 300:
+ return("Multiple Choices");
+ case 301:
+ return("Moved Permanently");
+ case 302:
+ return("Found");
+ case 303:
+ return("See Other");
+ case 304:
+ return("Not Modified");
+ case 307:
+ return("Moved Temporarily");
+ case 400:
+ return("Bad Request");
+ case 401:
+ return("Unauthorized");
+ case 403:
+ return("Forbidden");
+ case 404:
+ return("Not Found");
+ case 500:
+ return("Internal Server Error");
+ case 501:
+ return("Not Implemented");
+ case 503:
+ return("Service Unavailable");
+ default:
+ return("Unknown status");
+ }