Fixed a bug in stdredir.

[ashd.git] / lib / resp.c

diff --git a/lib/resp.c b/lib/resp.c
index 1271d2c..9d7325b 100644 (file)
--- a/lib/resp.c
+++ b/lib/resp.c
@@ -17,9 +17,12 @@
 */
 
 #include <stdlib.h>
+#include <unistd.h>
 #include <string.h>
 #include <stdio.h>
 #include <stdarg.h>
+#include <time.h>
+#include <regex.h>
 
 #ifdef HAVE_CONFIG_H
 #include <config.h>
@@ -71,12 +74,132 @@ void simpleerror(int fd, int code, char *msg, char *fmt, ...)
     bufcatstr(buf, "</body>\r\n");
     bufcatstr(buf, "</html>\r\n");
     free(tmp2);
-    out = fdopen(fd, "w");
-    fprintf(out, "HTTP/1.1 %i %s\r\n", code, msg);
-    fprintf(out, "Content-Type: text/html\r\n");
-    fprintf(out, "Content-Length: %i\r\n", buf.d);
-    fprintf(out, "\r\n");
+    out = fdopen(dup(fd), "w");
+    fprintf(out, "HTTP/1.1 %i %s\n", code, msg);
+    fprintf(out, "Content-Type: text/html\n");
+    fprintf(out, "Content-Length: %zi\n", buf.d);
+    fprintf(out, "\n");
     fwrite(buf.b, 1, buf.d, out);
     fclose(out);
     buffree(buf);
 }
+
+void stdredir(struct hthead *req, int fd, int code, char *dst)
+{
+    FILE *out;
+    char *sp, *cp, *ep, *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 = strrchr(url, '/')) != NULL)
+                   ep++;
+               else
+                   ep = url;
+               path = sprintf2("%.*s%s", ep - url, url, dst);
+           }
+           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));
+}
+
+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;
+    
+    int gtoi(regmatch_t g)
+    {
+       int i, n;
+
+       for(i = g.rm_so, n = 0; i < g.rm_eo; i++)
+           n = (n * 10) + (date[i] - '0');
+       return(n);
+    }
+    
+    int gstrcmp(regmatch_t g, char *str) {
+       if(g.rm_eo - g.rm_so != strlen(str))
+           return(1);
+       return(strncasecmp(date + g.rm_so, str, g.rm_eo - g.rm_so));
+    }
+
+    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(g[1]);
+    tm.tm_year = gtoi(g[3]) - 1900;
+    tm.tm_hour = gtoi(g[4]);
+    tm.tm_min = gtoi(g[5]);
+    tm.tm_sec = gtoi(g[6]);
+    
+    tm.tm_mon = -1;
+    for(i = 0; i < 12; i++) {
+       if(!gstrcmp(g[2], months[i])) {
+           tm.tm_mon = i;
+           break;
+       }
+    }
+    if(tm.tm_mon < 0)
+       return(0);
+    
+    if(g[8].rm_so > 0) {
+       if(!gstrcmp(g[8], "GMT"))
+           tz = 0;
+       else
+           return(0);
+    } else if((g[9].rm_so > 0) && (g[10].rm_so > 0)) {
+       tz = gtoi(g[9]) * 3600 + gtoi(g[10]) * 60;
+       if(date[g[7].rm_so] == '-')
+           tz = -tz;
+    } else {
+       return(0);
+    }
+    
+    return(timegm(&tm) - tz);
+}