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authorLars Hjemli <hjemli@gmail.com>2008-05-03 10:10:07 +0200
committerLars Hjemli <hjemli@gmail.com>2008-05-03 10:10:07 +0200
commite19683bedebc74593cb4c4518e47a334a5478e1e (patch)
tree8b4f231327d27b9451a6d9ab4b2af47558c61352 /cgit.c
parent112b2080626c62fff27cf8aaa9ac2fb07eb50b74 (diff)
parent9000bbf865cb3578ba5ed3810dc44253cb46ec7f (diff)
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Merge branch 'lh/cache'
* lh/cache: Add page 'ls_cache' Redesign the caching layer
Diffstat (limited to '')
-rw-r--r--cgit.c166
1 files changed, 37 insertions, 129 deletions
diff --git a/cgit.c b/cgit.c
index a402758..ccd61f4 100644
--- a/cgit.c
+++ b/cgit.c
@@ -49,6 +49,8 @@ void config_cb(const char *name, const char *value)
ctx.cfg.enable_log_filecount = atoi(value);
else if (!strcmp(name, "enable-log-linecount"))
ctx.cfg.enable_log_linecount = atoi(value);
+ else if (!strcmp(name, "cache-size"))
+ ctx.cfg.cache_size = atoi(value);
else if (!strcmp(name, "cache-root"))
ctx.cfg.cache_root = xstrdup(value);
else if (!strcmp(name, "cache-root-ttl"))
@@ -147,6 +149,8 @@ static void prepare_context(struct cgit_context *ctx)
{
memset(ctx, 0, sizeof(ctx));
ctx->cfg.agefile = "info/web/last-modified";
+ ctx->cfg.nocache = 0;
+ ctx->cfg.cache_size = 0;
ctx->cfg.cache_dynamic_ttl = 5;
ctx->cfg.cache_max_create_time = 5;
ctx->cfg.cache_repo_ttl = 5;
@@ -168,47 +172,8 @@ static void prepare_context(struct cgit_context *ctx)
ctx->page.mimetype = "text/html";
ctx->page.charset = PAGE_ENCODING;
ctx->page.filename = NULL;
-}
-
-static int cgit_prepare_cache(struct cacheitem *item)
-{
- if (!ctx.repo && ctx.qry.repo) {
- ctx.page.title = fmt("%s - %s", ctx.cfg.root_title,
- "Bad request");
- cgit_print_http_headers(&ctx);
- cgit_print_docstart(&ctx);
- cgit_print_pageheader(&ctx);
- cgit_print_error(fmt("Unknown repo: %s", ctx.qry.repo));
- cgit_print_docend();
- return 0;
- }
-
- if (!ctx.repo) {
- item->name = xstrdup(fmt("%s/index.%s.html",
- ctx.cfg.cache_root,
- cache_safe_filename(ctx.qry.raw)));
- item->ttl = ctx.cfg.cache_root_ttl;
- return 1;
- }
-
- if (!ctx.qry.page) {
- item->name = xstrdup(fmt("%s/%s/index.%s.html", ctx.cfg.cache_root,
- cache_safe_filename(ctx.repo->url),
- cache_safe_filename(ctx.qry.raw)));
- item->ttl = ctx.cfg.cache_repo_ttl;
- } else {
- item->name = xstrdup(fmt("%s/%s/%s/%s.html", ctx.cfg.cache_root,
- cache_safe_filename(ctx.repo->url),
- ctx.qry.page,
- cache_safe_filename(ctx.qry.raw)));
- if (ctx.qry.has_symref)
- item->ttl = ctx.cfg.cache_dynamic_ttl;
- else if (ctx.qry.has_sha1)
- item->ttl = ctx.cfg.cache_static_ttl;
- else
- item->ttl = ctx.cfg.cache_repo_ttl;
- }
- return 1;
+ ctx->page.modified = time(NULL);
+ ctx->page.expires = ctx->page.modified;
}
struct refmatch {
@@ -293,8 +258,9 @@ static int prepare_repo_cmd(struct cgit_context *ctx)
return 0;
}
-static void process_request(struct cgit_context *ctx)
+static void process_request(void *cbdata)
{
+ struct cgit_context *ctx = cbdata;
struct cgit_cmd *cmd;
cmd = cgit_get_cmd(ctx);
@@ -333,82 +299,6 @@ static void process_request(struct cgit_context *ctx)
cgit_print_docend();
}
-static long ttl_seconds(long ttl)
-{
- if (ttl<0)
- return 60 * 60 * 24 * 365;
- else
- return ttl * 60;
-}
-
-static void cgit_fill_cache(struct cacheitem *item, int use_cache)
-{
- int stdout2;
-
- if (use_cache) {
- stdout2 = chk_positive(dup(STDOUT_FILENO),
- "Preserving STDOUT");
- chk_zero(close(STDOUT_FILENO), "Closing STDOUT");
- chk_positive(dup2(item->fd, STDOUT_FILENO), "Dup2(cachefile)");
- }
-
- ctx.page.modified = time(NULL);
- ctx.page.expires = ctx.page.modified + ttl_seconds(item->ttl);
- process_request(&ctx);
-
- if (use_cache) {
- chk_zero(close(STDOUT_FILENO), "Close redirected STDOUT");
- chk_positive(dup2(stdout2, STDOUT_FILENO),
- "Restoring original STDOUT");
- chk_zero(close(stdout2), "Closing temporary STDOUT");
- }
-}
-
-static void cgit_check_cache(struct cacheitem *item)
-{
- int i = 0;
-
- top:
- if (++i > ctx.cfg.max_lock_attempts) {
- die("cgit_refresh_cache: unable to lock %s: %s",
- item->name, strerror(errno));
- }
- if (!cache_exist(item)) {
- if (!cache_lock(item)) {
- sleep(1);
- goto top;
- }
- if (!cache_exist(item)) {
- cgit_fill_cache(item, 1);
- cache_unlock(item);
- } else {
- cache_cancel_lock(item);
- }
- } else if (cache_expired(item) && cache_lock(item)) {
- if (cache_expired(item)) {
- cgit_fill_cache(item, 1);
- cache_unlock(item);
- } else {
- cache_cancel_lock(item);
- }
- }
-}
-
-static void cgit_print_cache(struct cacheitem *item)
-{
- static char buf[4096];
- ssize_t i;
-
- int fd = open(item->name, O_RDONLY);
- if (fd<0)
- die("Unable to open cached file %s", item->name);
-
- while((i=read(fd, buf, sizeof(buf))) > 0)
- write(STDOUT_FILENO, buf, i);
-
- close(fd);
-}
-
static void cgit_parse_args(int argc, const char **argv)
{
int i;
@@ -443,13 +333,29 @@ static void cgit_parse_args(int argc, const char **argv)
}
}
+static int calc_ttl()
+{
+ if (!ctx.repo)
+ return ctx.cfg.cache_root_ttl;
+
+ if (!ctx.qry.page)
+ return ctx.cfg.cache_repo_ttl;
+
+ if (ctx.qry.has_symref)
+ return ctx.cfg.cache_dynamic_ttl;
+
+ if (ctx.qry.has_sha1)
+ return ctx.cfg.cache_static_ttl;
+
+ return ctx.cfg.cache_repo_ttl;
+}
+
int main(int argc, const char **argv)
{
- struct cacheitem item;
const char *cgit_config_env = getenv("CGIT_CONFIG");
+ int err, ttl;
prepare_context(&ctx);
- item.st.st_mtime = time(NULL);
cgit_repolist.length = 0;
cgit_repolist.count = 0;
cgit_repolist.repos = NULL;
@@ -463,13 +369,15 @@ int main(int argc, const char **argv)
ctx.qry.raw = xstrdup(getenv("QUERY_STRING"));
cgit_parse_args(argc, argv);
http_parse_querystring(ctx.qry.raw, querystring_cb);
- if (!cgit_prepare_cache(&item))
- return 0;
- if (ctx.cfg.nocache) {
- cgit_fill_cache(&item, 0);
- } else {
- cgit_check_cache(&item);
- cgit_print_cache(&item);
- }
- return 0;
+
+ ttl = calc_ttl();
+ ctx.page.expires += ttl*60;
+ if (ctx.cfg.nocache)
+ ctx.cfg.cache_size = 0;
+ err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
+ ctx.qry.raw, ttl, process_request, &ctx);
+ if (err)
+ cache_log("[cgit] error %d - %s\n",
+ err, strerror(err));
+ return err;
}