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/*
* 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
#if 0
int ngx_http_cache_get_file(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx)
{
MD5_CTX md5;
/* we use offsetof() because sizeof() pads struct size to int size */
ctx->header_size = offsetof(ngx_http_cache_header_t, key)
+ ctx->key.len + 1;
ctx->file.name.len = ctx->path->name.len + 1 + ctx->path->len + 32;
if (!(ctx->file.name.data = ngx_palloc(r->pool, ctx->file.name.len + 1))) {
return NGX_ERROR;
}
ngx_memcpy(ctx->file.name.data, ctx->path->name.data, ctx->path->name.len);
MD5Init(&md5);
MD5Update(&md5, (u_char *) ctx->key.data, ctx->key.len);
MD5Final(ctx->md5, &md5);
ngx_md5_text(ctx->file.name.data + ctx->path->name.len + 1 + ctx->path->len,
ctx->md5);
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"file cache uri: %s, md5: %s", ctx->key.data,
ctx->file.name.data + ctx->path->name.len + 1 + ctx->path->len);
ngx_create_hashed_filename(&ctx->file, ctx->path);
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"file cache name: %s", ctx->file.name.data);
/* TODO: look open files cache */
return ngx_http_cache_open_file(ctx, 0);
}
int ngx_http_cache_open_file(ngx_http_cache_ctx_t *ctx, ngx_file_uniq_t uniq)
{
ssize_t n;
ngx_err_t err;
ngx_http_cache_header_t *h;
ctx->file.fd = ngx_open_file(ctx->file.name.data,
NGX_FILE_RDONLY, NGX_FILE_OPEN);
if (ctx->file.fd == NGX_INVALID_FILE) {
err = ngx_errno;
if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
return NGX_DECLINED;
}
ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
ngx_open_file_n " \"%s\" failed", ctx->file.name.data);
return NGX_ERROR;
}
if (uniq) {
if (ngx_fd_info(ctx->file.fd, &ctx->file.info) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", ctx->file.name.data);
return NGX_ERROR;
}
if (ngx_file_uniq(&ctx->file.info) == uniq) {
if (ngx_close_file(ctx->file.fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, ctx->log, ngx_errno,
ngx_close_file_n " \"%s\" failed",
ctx->file.name.data);
}
return NGX_HTTP_CACHE_THE_SAME;
}
}
n = ngx_read_file(&ctx->file, ctx->buf->pos,
ctx->buf->end - ctx->buf->last, 0);
if (n == NGX_ERROR || n == NGX_AGAIN) {
return n;
}
if (n <= ctx->header_size) {
ngx_log_error(NGX_LOG_CRIT, ctx->log, 0,
"cache file \"%s\" is too small", ctx->file.name.data);
return NGX_ERROR;
}
h = (ngx_http_cache_header_t *) ctx->buf->pos;
ctx->expires = h->expires;
ctx->last_modified= h->last_modified;
ctx->date = h->date;
ctx->length = h->length;
if (h->key_len > (size_t) (ctx->buf->end - ctx->buf->pos)) {
ngx_log_error(NGX_LOG_ALERT, ctx->log, 0,
"cache file \"%s\" is probably invalid",
ctx->file.name.data);
return NGX_DECLINED;
}
if (ctx->key.len
&& (h->key_len != ctx->key.len
|| ngx_strncmp(h->key, ctx->key.data, h->key_len) != 0))
{
h->key[h->key_len] = '\0';
ngx_log_error(NGX_LOG_ALERT, ctx->log, 0,
"md5 collision: \"%s\" and \"%s\"",
h->key, ctx->key.data);
return NGX_DECLINED;
}
ctx->buf->last += n;
if (ctx->expires < ngx_time()) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ctx->log, 0,
"http file cache expired");
return NGX_HTTP_CACHE_STALE;
}
/* TODO: NGX_HTTP_CACHE_AGED */
return NGX_OK;
}
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, ngx_errno,
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;
}
}
int ngx_garbage_collector_http_cache_handler(ngx_gc_t *gc, ngx_str_t *name,
ngx_dir_t *dir)
{
int rc;
char data[sizeof(ngx_http_cache_header_t)];
ngx_hunk_t buf;
ngx_http_cache_ctx_t ctx;
ctx.file.fd = NGX_INVALID_FILE;
ctx.file.name = *name;
ctx.file.log = gc->log;
ctx.header_size = sizeof(ngx_http_cache_header_t);
ctx.buf = &buf;
ctx.log = gc->log;
ctx.key.len = 0;
buf.type = NGX_HUNK_IN_MEMORY|NGX_HUNK_TEMP;
buf.pos = data;
buf.last = data;
buf.start = data;
buf.end = data + sizeof(ngx_http_cache_header_t);
rc = ngx_http_cache_open_file(&ctx, 0);
/* 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, gc->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;
}
#endif
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