dirplex: Moved to its own directory and split off configuration code.

[ashd.git] / src / sendfile.c

diff --git a/src/sendfile.c b/src/sendfile.c
index f12e33e..b3797aa 100644 (file)
--- a/src/sendfile.c
+++ b/src/sendfile.c
@@ -25,6 +25,9 @@
 #include <sys/stat.h>
 #include <stdint.h>
 #include <time.h>
+#include <magic.h>
+#include <locale.h>
+#include <langinfo.h>
 
 #ifdef HAVE_CONFIG_H
 #include <config.h>
@@ -33,6 +36,12 @@
 #include <log.h>
 #include <resp.h>
 
+#ifdef HAVE_XATTR
+#include <attr/xattr.h>
+#endif
+
+static magic_t cookie = NULL;
+
 static void passdata(int in, int out)
 {
     int ret, len, off;
@@ -58,27 +67,58 @@ static void passdata(int in, int out)
     free(buf);
 }
 
-static int strrcmp(char *str, char *end)
+static char *attrmimetype(char *file)
 {
-    return(strcmp(str + strlen(str) - strlen(end), end));
+#ifdef HAVE_XATTR
+    static char buf[1024];
+    int i;
+    ssize_t sz;
+    
+    if((sz = getxattr(file, "user.ash-mime-type", buf, sizeof(buf) - 1)) > 0)
+       goto found;
+    if((sz = getxattr(file, "user.mime-type", buf, sizeof(buf) - 1)) > 0)
+       goto found;
+    if((sz = getxattr(file, "user.mime_type", buf, sizeof(buf) - 1)) > 0)
+       goto found;
+    if((sz = getxattr(file, "user.Content-Type", buf, sizeof(buf) - 1)) > 0)
+       goto found;
+    return(NULL);
+found:
+    for(i = 0; i < sz; i++) {
+       if((buf[sz] < 32) || (buf[sz] >= 128))
+           return(NULL);
+    }
+    buf[sz] = 0;
+    return(buf);
+#else
+    return(NULL);
+#endif
 }
 
-static char *getmimetype(char *file, struct stat *sb)
+static const char *getmimetype(char *file, struct stat *sb)
 {
-    /* Rewrite with libmagic. */
-    if(!strrcmp(file, ".html"))
-       return("text/html");
-    if(!strrcmp(file, ".xhtml"))
-       return("application/xhtml+xml");
-    if(!strrcmp(file, ".txt"))
-       return("text/plain");
-    if(!strrcmp(file, ".py"))
-       return("text/plain");
-    if(!strrcmp(file, ".c"))
-       return("text/plain");
+    const char *ret;
+    
+    if((ret = attrmimetype(file)) != NULL)
+       return(ret);
+    if(cookie == NULL) {
+       cookie = magic_open(MAGIC_MIME_TYPE | MAGIC_SYMLINK);
+       magic_load(cookie, NULL);
+    }
+    if((ret = magic_file(cookie, file)) != NULL)
+       return(ret);
     return("application/octet-stream");
 }
 
+/* XXX: This could be made far better and check for other attributes
+ * and stuff, but not now. */
+static const char *ckctype(const char *ctype)
+{
+    if(!strncmp(ctype, "text/", 5) && (strchr(ctype, ';') == NULL))
+       return(sprintf2("%s; charset=%s", ctype, nl_langinfo(CODESET)));
+    return(ctype);
+}
+
 static void checkcache(char *file, struct stat *sb)
 {
     char *hdr;
@@ -86,29 +126,49 @@ static void checkcache(char *file, struct stat *sb)
     if((hdr = getenv("REQ_IF_MODIFIED_SINCE")) != NULL) {
        if(parsehttpdate(hdr) < sb->st_mtime)
            return;
-       printf("HTTP/1.1 304 Not Modified\r\n");
-       printf("Date: %s\r\n", fmthttpdate(time(NULL)));
-       printf("Content-Length: 0\r\n");
-       printf("\r\n");
+       printf("HTTP/1.1 304 Not Modified\n");
+       printf("Date: %s\n", fmthttpdate(time(NULL)));
+       printf("Content-Length: 0\n");
+       printf("\n");
        exit(0);
     }
 }
 
+static void usage(void)
+{
+    flog(LOG_ERR, "usage: sendfile [-c CONTENT-TYPE] METHOD URL REST");
+}
+
 int main(int argc, char **argv)
 {
+    int c;
     char *file;
     struct stat sb;
     int fd;
+    const char *contype;
     
-    if(argc < 4) {
-       flog(LOG_ERR, "usage: sendfile METHOD URL REST");
+    setlocale(LC_ALL, "");
+    contype = NULL;
+    while((c = getopt(argc, argv, "c:")) >= 0) {
+       switch(c) {
+       case 'c':
+           contype = optarg;
+           break;
+       default:
+           usage();
+           exit(1);
+           break;
+       }
+    }
+    if(argc - optind < 3) {
+       usage();
        exit(1);
     }
     if((file = getenv("REQ_X_ASH_FILE")) == NULL) {
        flog(LOG_ERR, "sendfile: needs to be called with the X-Ash-File header");
        exit(1);
     }
-    if(*argv[3]) {
+    if(*argv[optind + 2]) {
        simpleerror(1, 404, "Not Found", "The requested URL has no corresponding resource.");
        exit(0);
     }
@@ -117,17 +177,20 @@ int main(int argc, char **argv)
        simpleerror(1, 500, "Internal Error", "The server could not access its own data.");
        exit(1);
     }
+    if(contype == NULL)
+       contype = getmimetype(file, &sb);
+    contype = ckctype(contype);
     
     checkcache(file, &sb);
     
-    printf("HTTP/1.1 200 OK\r\n");
-    printf("Content-Type: %s\r\n", getmimetype(file, &sb));
-    printf("Content-Length: %ji\r\n", (intmax_t)sb.st_size);
-    printf("Last-Modified: %s\r\n", fmthttpdate(sb.st_mtime));
-    printf("Date: %s\r\n", fmthttpdate(time(NULL)));
-    printf("\r\n");
+    printf("HTTP/1.1 200 OK\n");
+    printf("Content-Type: %s\n", contype);
+    printf("Content-Length: %ji\n", (intmax_t)sb.st_size);
+    printf("Last-Modified: %s\n", fmthttpdate(sb.st_mtime));
+    printf("Date: %s\n", fmthttpdate(time(NULL)));
+    printf("\n");
     fflush(stdout);
-    if(strcasecmp(argv[1], "head"))
+    if(strcasecmp(argv[optind], "head"))
        passdata(fd, 1);
     return(0);
 }