blob: 9f93bd8f50c4a3fbc6b189fef13368539c53b278 [file] [log] [blame]
/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#if (NGX_HAVE_OPENSSL_MD5_H)
#include <openssl/md5.h>
#else
#include <md5.h>
#endif
#if (NGX_OPENSSL_MD5)
#define MD5Init MD5_Init
#define MD5Update MD5_Update
#define MD5Final MD5_Final
#endif
ngx_int_t ngx_http_file_cache_get(ngx_http_request_t *r,
ngx_http_cache_ctx_t *ctx)
{
ngx_uint_t i;
ngx_str_t *key;
ngx_http_cache_t *c;
MD5_CTX md5;
c = r->cache;
c->file.name.len = ctx->path->name.len + 1 + ctx->path->len + 32;
if (!(c->file.name.data = ngx_palloc(r->pool, c->file.name.len + 1))) {
return NGX_ABORT;
}
MD5Init(&md5);
key = c->key.elts;
for (i = 0; i < c->key.nelts; i++) {
MD5Update(&md5, key[i].data, key[i].len);
}
MD5Update(&md5, ctx->key.data, ctx->key.len);
MD5Final(c->md5, &md5);
ngx_memcpy(c->file.name.data, ctx->path->name.data, ctx->path->name.len);
ngx_md5_text(c->file.name.data + ctx->path->name.len + 1 + ctx->path->len,
c->md5);
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"file cache key: %V, md5: %s", &ctx->key,
c->file.name.data + ctx->path->name.len + 1 + ctx->path->len);
ngx_create_hashed_filename(&c->file, ctx->path);
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"file cache name: %s", c->file.name.data);
return ngx_http_file_cache_open(r->cache);
}
ngx_int_t ngx_http_file_cache_open(ngx_http_cache_t *c)
{
ssize_t n;
ngx_err_t err;
ngx_http_cache_header_t *h;
c->file.fd = ngx_open_file(c->file.name.data,
NGX_FILE_RDONLY, NGX_FILE_OPEN);
if (c->file.fd == NGX_INVALID_FILE) {
err = ngx_errno;
if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
return NGX_DECLINED;
}
ngx_log_error(NGX_LOG_CRIT, c->log, ngx_errno,
ngx_open_file_n " \"%s\" failed", c->file.name.data);
return NGX_ERROR;
}
if (c->uniq) {
if (ngx_fd_info(c->file.fd, &c->file.info) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, c->log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", c->file.name.data);
return NGX_ERROR;
}
if (ngx_file_uniq(&c->file.info) == c->uniq) {
if (ngx_close_file(c->file.fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
ngx_close_file_n " \"%s\" failed",
c->file.name.data);
}
return NGX_HTTP_CACHE_THE_SAME;
}
}
n = ngx_read_file(&c->file, c->buf->pos, c->buf->end - c->buf->last, 0);
if (n == NGX_ERROR || n == NGX_AGAIN) {
return n;
}
if (n <= c->header_size) {
ngx_log_error(NGX_LOG_CRIT, c->log, 0,
"cache file \"%s\" is too small", c->file.name.data);
return NGX_ERROR;
}
h = (ngx_http_cache_header_t *) c->buf->pos;
c->expires = h->expires;
c->last_modified= h->last_modified;
c->date = h->date;
c->length = h->length;
if (h->key_len > (size_t) (c->buf->end - c->buf->pos)) {
ngx_log_error(NGX_LOG_ALERT, c->log, 0,
"cache file \"%s\" is probably invalid",
c->file.name.data);
return NGX_DECLINED;
}
#if 0
/* TODO */
if (c->key_len && h->key_len != c->key_len) {
ngx_strncmp(h->key, c->key_data, h->key_len) != 0))
h->key[h->key_len] = '\0';
ngx_log_error(NGX_LOG_ALERT, c->log, 0,
"md5 collision: \"%s\" and \"%s\"",
h->key, c->key.data);
return NGX_DECLINED;
}
#endif
c->buf->last += n;
if (c->expires < ngx_time()) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http file cache expired");
return NGX_HTTP_CACHE_STALE;
}
/* TODO: NGX_HTTP_CACHE_AGED */
/* STUB */ return NGX_DECLINED;
return NGX_OK;
}
#if 0
int ngx_http_cache_update_file(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx,
ngx_str_t *temp_file)
{
int retry;
ngx_err_t err;
retry = 0;
for ( ;; ) {
if (ngx_rename_file(temp_file->data, ctx->file.name.data) == NGX_OK) {
return NGX_OK;
}
err = ngx_errno;
#if (NGX_WIN32)
if (err == NGX_EEXIST) {
if (ngx_win32_rename_file(temp_file, &ctx->file.name, r->pool)
== NGX_ERROR)
{
return NGX_ERROR;
}
}
#endif
if (retry || (err != NGX_ENOENT && err != NGX_ENOTDIR)) {
ngx_log_error(NGX_LOG_CRIT, r->connection->log, err,
ngx_rename_file_n "(\"%s\", \"%s\") failed",
temp_file->data, ctx->file.name.data);
return NGX_ERROR;
}
if (ngx_create_path(&ctx->file, ctx->path) == NGX_ERROR) {
return NGX_ERROR;
}
retry = 1;
}
}
#endif
ngx_int_t ngx_http_cache_cleaner_handler(ngx_gc_t *gc, ngx_str_t *name,
ngx_dir_t *dir)
{
int rc;
ngx_buf_t buf;
ngx_http_cache_t c;
u_char data[sizeof(ngx_http_cache_header_t)];
ngx_memzero(&c, sizeof(ngx_http_cache_t));
c.file.fd = NGX_INVALID_FILE;
c.file.name = *name;
c.file.log = gc->log;
c.header_size = sizeof(ngx_http_cache_header_t);
c.buf = &buf;
c.log = gc->log;
c.key_len = 0;
buf.memory = 1;
buf.temporary = 1;
buf.pos = data;
buf.last = data;
buf.start = data;
buf.end = data + sizeof(ngx_http_cache_header_t);
rc = ngx_http_file_cache_open(&c);
/* TODO: NGX_AGAIN */
if (rc != NGX_ERROR&& rc != NGX_DECLINED && rc != NGX_HTTP_CACHE_STALE) {
return NGX_OK;
}
if (ngx_delete_file(name->data) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, c.log, ngx_errno,
ngx_delete_file_n " \"%s\" failed", name->data);
return NGX_ERROR;
}
gc->deleted++;
gc->freed += ngx_de_size(dir);
return NGX_OK;
}