now using libmagic and its optional

1 files changed, 75 insertions, 46 deletions

diff --git a/src/main.c b/src/main.c
index 9420c47..8817b83 100644
--- a/src/main.c
+++ b/src/main.c
@@ -13,7 +13,7 @@
 #define PORT "8079"
 
 #define RM_LF(str) do {                                     \
-        signed long len = strlen(str)-1;                  \
+        signed long len = strlen(str)-1;                    \
         if(len >= 0 && str[len] == '\n') str[len] = '\0';   \
     } while(0)
 
@@ -35,58 +35,60 @@
         SEND_BUF_ADD("\r\n");                        \
     } while(0)
 
-#define LOAD_FILE() do {                                                \
-        if(is_binary) {                                                 \
-            fseek(fp, 0, SEEK_END);                                     \
-            size_t file_sz = ftell(fp);                                 \
-            rewind(fp);                                                 \
-                                                                        \
-            fread(&send_buf[*send_buf_sz], sizeof(char), file_sz, fp);  \
-            *send_buf_sz += file_sz;                                    \
-        } else {                                                        \
-            char line[BUF_CAP];                                         \
-            while(fgets(line, sizeof(line), fp) != NULL)                \
-            {                                                           \
-                RM_LF(line);                                            \
-                SEND_BUF_ADD_LINE(line);                                \
-            }                                                           \
-        }                                                               \
+#define SEND_BUF_ADD_LINE_LONG(lon) do {        \
+        char str[COMMON_CAP];                   \
+        sprintf(str, "%ld", lon);               \
+        SEND_BUF_ADD_LINE(str);                 \
     } while(0)
 
+#ifdef USE_LIBMAGIC
+#include <magic.h>
 static int get_content_type(char *file_path, char *content_type)
 {
-    char cmd[COMMON_CAP + 64];
-    sprintf(cmd, "/usr/bin/file -ib %s", file_path);
+    int ret = 1;
+    magic_t magic;
 
-    FILE *fp = popen(cmd, "r");
-    if(!fp) {
-        err("popen: cmd %s: %s", cmd, strerror(errno));
-        return 1;
+    if((magic = magic_open(MAGIC_MIME)) == NULL) {
+        err("magic_open: %s", magic_error(magic));
+        return ret;
     }
 
-    if(fgets(content_type, COMMON_CAP, fp) == NULL) {
-        err("get_mime_type: no output from fgets");
-        return 1;
+    if(magic_load(magic, NULL) != 0) {
+        err("magic_load: %s", magic_error(magic));
+        goto close;
     }
 
-    pclose(fp);
-    RM_LF(content_type);
-
-    char ct_cpy[COMMON_CAP];
-    strcpy(ct_cpy, content_type);
-    strtok(ct_cpy, "=");
-
-    // the only thing after the '=' should be the either binary or something else (text)
-    char *charset = strtok(NULL, "=");
-    if(charset == NULL || strcmp(charset, "binary") != 0) {
-        return 0;
+    const char *mime = magic_file(magic, file_path);
+    if(mime == NULL) {
+        err("magic_file: %s", magic_error(magic));
+        goto close;
     }
 
-    return -1;
+    memcpy(content_type, mime, strlen(mime));
+
+    ret = 0;
+close:
+    magic_close(magic);
+    return ret;
+}
+#else
+static int get_content_type(char *file_path, char *content_type)
+{
+    (void)file_path;
+    (void)content_type;
+    return 0;
 }
+#endif
 
 static int try_file(char *req_path, FILE **fp, char *content_type)
 {
+    for(size_t i = 1; i < strlen(req_path); i++) {
+        if(req_path[i-1] == '.' && req_path[i] == '.') {
+            err("try_file: the requested path %s includes ..", req_path);
+            return 1;
+        }
+    }
+
     char file_path[COMMON_CAP];
     sprintf(file_path, "%s%s", FILES,
             (strlen(req_path) == 1) ? "/index.html" : req_path);
@@ -96,24 +98,31 @@ static int try_file(char *req_path, FILE **fp, char *content_type)
         err("fopen: file %s: %s", file_path, strerror(errno));
         return 1;
     }
+
     info("fopen: file %s was opened", file_path);
 
-    return get_content_type(file_path, content_type);
+    if(get_content_type(file_path, content_type) != 0) {
+        err("get_content_type: failed");
+        fclose(*fp);
+        return 1;
+    }
+
+    return 0;
 }
 
 static int on_get(char *send_buf, ssize_t *send_buf_sz, char *req_path)
 {
-    char content_type[COMMON_CAP];
-    int is_binary; // 0 - no; -1 - yes; 1 - error
+    int ret = 1;
+    char content_type[COMMON_CAP] = {0};
 
     FILE *fp;
-    if((is_binary = try_file(req_path, &fp, content_type)) == 1) {
+    if(try_file(req_path, &fp, content_type) != 0) {
         if(errno == 2) { // 2 is 'No such file or directory'
             SEND_BUF_ADD_LINE("404");
-            if((is_binary = try_file("/404.html", &fp, content_type)) != 0) return 1;
+            if(try_file("/404.html", &fp, content_type) != 0) return ret;
         } else {
             SEND_BUF_ADD_LINE("500");
-            if((is_binary = try_file("/500.html", &fp, content_type)) != 0) return 1;
+            if(try_file("/500.html", &fp, content_type) != 0) return ret;
         }
     } else {
         SEND_BUF_ADD_LINE("200");
@@ -122,11 +131,31 @@ static int on_get(char *send_buf, ssize_t *send_buf_sz, char *req_path)
     SEND_BUF_ADD_LINE("Server: potato");
     SEND_BUF_ADD("Content-Type: ");
     SEND_BUF_ADD_LINE(content_type);
+
+    if(fseek(fp, 0, SEEK_END) != 0) {
+        err("fseek: %s", strerror(errno));
+        goto close;
+    }
+
+    size_t file_sz = ftell(fp);
+    if(file_sz == 0) {
+        err("ftell: %s", strerror(errno));
+        goto close;
+    }
+
+    rewind(fp);
+
+    SEND_BUF_ADD("Content-Lenght: ");
+    SEND_BUF_ADD_LINE_LONG(file_sz);
     SEND_BUF_ADD("\r\n");
-    LOAD_FILE();
 
+    fread(&send_buf[*send_buf_sz], sizeof(char), file_sz, fp);
+    *send_buf_sz += file_sz;
+
+    ret = 0;
+close:
     fclose(fp);
-    return 0;
+    return ret;
 }
 
 static int handle_connection(sock_t *conn)