Use item in cache instead of redownloading it - sacc - sacc(omys), simple console gopher client
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---
DIR commit dbc5c018d5773da8514ff933815c9612d20b2677
DIR parent 74347a93e3ab3f90c310b2f4d457fb9717401c65
HTML Author: Quentin Rameau <quinq@fifth.space>
Date: Wed, 26 Jul 2017 17:40:10 +0200
Use item in cache instead of redownloading it
Diffstat:
M sacc.c | 32 +++++++++++++++++++++++--------
1 file changed, 24 insertions(+), 8 deletions(-)
---
DIR diff --git a/sacc.c b/sacc.c
@@ -369,12 +369,19 @@ download(Item *item, int dest)
{
char buf[BUFSIZ];
ssize_t r, w;
- int sock;
-
- sock = connectto(item->host, item->port);
- sendselector(sock, item->selector);
+ int src;
+
+ if (!item->tag) {
+ src = connectto(item->host, item->port);
+ sendselector(src, item->selector);
+ } else if ((src = open(item->tag, O_RDONLY)) < 0) {
+ printf("Can't open source file %s: %s\n",
+ item->tag, strerror(errno));
+ errno = 0;
+ return 0;
+ }
- while ((r = read(sock, buf, BUFSIZ)) > 0) {
+ while ((r = read(src, buf, BUFSIZ)) > 0) {
while ((w = write(dest, buf, r)) > 0)
r -= w;
}
@@ -385,7 +392,7 @@ download(Item *item, int dest)
errno = 0;
}
- close(sock);
+ close(src);
return (r == 0 && w == 0);
}
@@ -393,7 +400,7 @@ download(Item *item, int dest)
static void
downloaditem(Item *item)
{
- char *file, *path;
+ char *file, *path, *tag;
mode_t mode = S_IRUSR|S_IWUSR|S_IRGRP;
int dest;
@@ -410,6 +417,14 @@ downloaditem(Item *item)
else
path = xstrdup(file);
+ if (tag = item->tag) {
+ if (access(tag, R_OK) < 0) {
+ clear(&item->tag);
+ } else if (!strcmp(tag, path)) {
+ goto cleanup;
+ }
+ }
+
if ((dest = open(path, O_WRONLY|O_CREAT|O_EXCL, mode)) < 0) {
printf("Can't open destination file %s: %s\n",
path, strerror(errno));
@@ -420,7 +435,8 @@ downloaditem(Item *item)
if (!download(item, dest))
goto cleanup;
- item->tag = path;
+ if (!item->tag)
+ item->tag = path;
return;
cleanup:
free(path);