Mercurial > hg > nginx-vendor-0-5
view src/http/ngx_http_file_cache.c @ 1:80bdda0151b0
Added tag NGINX_0_1_0 for changeset f0b350454894
author | Igor Sysoev <http://sysoev.ru> |
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date | Mon, 04 Oct 2004 00:00:00 +0400 |
parents | f0b350454894 |
children | 46833bd150cb |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> #if (HAVE_OPENSSL_MD5_H) #include <openssl/md5.h> #else #include <md5.h> #endif #if (HAVE_OPENSSL_MD5) #define MD5Init MD5_Init #define MD5Update MD5_Update #define MD5Final MD5_Final #endif 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 (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; }