Added mime type detection

Signed-off-by: Tyrolyean <tyrolyean@tyrolyean.net>

include/mail.h

@@ -23,6 +23,11 @@
 #include <stdbool.h>
 #include <sys/types.h>
 
+struct type_file_info_t{
+	char* name;
+	char* mime_type;
+};
+
 struct email_t{
 	char* message;
 	/* From the below values you can say pretty much anything about the 
@@ -49,12 +54,20 @@ struct email_t{
 	size_t ct_len;
 	char* content_type;
 	
+	/* NOTICE: the boundary, content_type and message fields may be updated
+	 * when the message of the root object is modified. See the 
+	 * propagate_root_pointer function for further information
+	 */
+
 	size_t submes_cnt;
 	struct email_t** submes;
 	struct email_t* parent;
 	bool base64_encoded;
+	struct type_file_info_t file_info;
 };
 
+
+
 int append_header(struct email_t* mail, const char* key, const char* value);
 int append_to_header(struct email_t* mail, const char* pair);
 
@@ -64,6 +77,8 @@ void propagate_insert_delete(struct email_t* mail, char* change_p,
 	ssize_t change);
 void propagate_root_pointer(struct email_t* mail, char* change_p, char* old_p);
 
+struct type_file_info_t get_mime_file_info(struct email_t* mail);
+
 #define MULTIPART_MIME "multipart/"
 #define BASE64_ENC "base64"
 

include/tools.h

@@ -29,8 +29,8 @@ char* search_header_key(const struct email_t* mail, const char* key);
 char* get_value_from_key(size_t* val_len, size_t key_offset, 
 	const struct email_t* mail);
 
-char* get_multipart_boundary(char* content_type, size_t content_len,
-	size_t* boundary_len);
+char* get_value_equals(char* content_type, size_t content_len,
+	size_t* boundary_len, char* key);
 
 const char* get_next_line(const char* message, size_t len);
 const char* get_prev_line(const char* message, size_t len_neg);

src/attach.c

@@ -77,8 +77,9 @@ struct email_t* mail_from_text(char* message, size_t length,
 				 */
 				mail->is_multipart = true;
 				 size_t bd_len = 0;
-				char* bd = get_multipart_boundary(
-					mime_type, value_length, &bd_len);
+				char* bd = get_value_equals(
+					mime_type, value_length, &bd_len, 
+					"boundary");
 				
 				if(bd != NULL){
 					mail->boundary = bd;
@@ -98,6 +99,8 @@ struct email_t* mail_from_text(char* message, size_t length,
 	}
 	mail->base64_encoded = detect_base64(mail);
 	
+	mail->file_info = get_mime_file_info(mail);
+
 	return mail;
 }
 
@@ -236,9 +239,18 @@ void print_mail_structure(struct email_t *email, unsigned int level){
 			print_mail_structure(email->submes[i], level+1);
 		}
 	}else{
-		printf("final message with length %lu and type [%.*s] \n", 
+		if( email->file_info.mime_type == NULL){
+	
+			printf("final message with length %lu and type "
+				"[%.*s] \n", 
 				email->message_length, (int)email->ct_len, 
 				email->content_type);
+		}else{
+			printf("final message with length %lu and type [%s] \n", 
+				email->message_length, 
+				email->file_info.mime_type);
+			
+		}
 	}
 
 	return;

src/mail.c

@@ -168,3 +168,36 @@ void propagate_root_pointer(struct email_t* mail, char* change_p, char* old_p){
 	
 	return;
 }
+struct type_file_info_t get_mime_file_info(struct email_t* mail){
+
+	struct type_file_info_t fileinfo;
+	fileinfo.name = NULL;
+	fileinfo.mime_type = NULL;
+	
+	if(mail->content_type == NULL){
+		return fileinfo;
+	}
+
+	char* semic = strchr(mail->content_type, ';');
+	size_t mime_len = 0;
+	if(semic > (mail->content_type + mail->ct_len)){
+		mime_len = mail->ct_len;
+	}else{
+		mime_len = semic - mail->content_type;
+	}
+
+	fileinfo.mime_type = malloc(mime_len + 1);
+	memset(fileinfo.mime_type, 0, mime_len + 1);
+	memcpy(fileinfo.mime_type, mail->content_type, mime_len);
+	size_t filename_len = 0;
+	char* filename = get_value_equals(mail->content_type, mail->ct_len,
+		&filename_len, "name");
+	
+	if(filename != NULL){
+		fileinfo.name = malloc(filename_len + 1);
+		memset(fileinfo.name, 0, filename_len + 1);
+		memcpy(fileinfo.name, filename, filename_len);
+	}
+
+	return fileinfo;
+}

src/tools.c

@@ -119,14 +119,14 @@ char* get_value_from_key(size_t* val_len, size_t key_offset,
 	return val;
 }
 
-char* get_multipart_boundary(char* content_type, size_t content_len, 
-	size_t* boundary_len){
+char* get_value_equals(char* content_type, size_t content_len, 
+	size_t* boundary_len, char* key){
 
 	if(content_type == NULL || boundary_len == NULL){
 		return NULL;
 	}
 	
-	char* bd = "boundary";
+	char* bd = key;
 	char* boundary_begin = NULL;
 	size_t bd_len = strlen(bd);
 	long boundary_offset = -1;