mirror of
https://github.com/nginx/nginx.git
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1b73583ba2
*) Bugfix: on Solaris and Linux there may be too many "recvmsg() returned not enough data" alerts. *) Bugfix: there were the "writev() failed (22: Invalid argument)" errors on Solaris in proxy mode without sendfile. On other platforms that do not support sendfile at all the process got caught in an endless loop. *) Bugfix: segmentation fault on Solaris in proxy mode and using sendfile. *) Bugfix: segmentation fault on Solaris. *) Bugfix: on-line upgrade did not work on Linux. *) Bugfix: the ngx_http_autoindex_module module did not escape the spaces, the quotes, and the percent signs in the directory listing. *) Change: the decrease of the copy operations. *) Feature: the userid_p3p directive.
240 lines
6.4 KiB
C
240 lines
6.4 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_http.h>
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#if (HAVE_OPENSSL_MD5_H)
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#include <openssl/md5.h>
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#else
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#include <md5.h>
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#endif
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#if (HAVE_OPENSSL_MD5)
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#define MD5Init MD5_Init
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#define MD5Update MD5_Update
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#define MD5Final MD5_Final
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#endif
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int ngx_http_cache_get_file(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx)
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{
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MD5_CTX md5;
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/* we use offsetof() because sizeof() pads struct size to int size */
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ctx->header_size = offsetof(ngx_http_cache_header_t, key)
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+ ctx->key.len + 1;
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ctx->file.name.len = ctx->path->name.len + 1 + ctx->path->len + 32;
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if (!(ctx->file.name.data = ngx_palloc(r->pool, ctx->file.name.len + 1))) {
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return NGX_ERROR;
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}
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ngx_memcpy(ctx->file.name.data, ctx->path->name.data, ctx->path->name.len);
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MD5Init(&md5);
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MD5Update(&md5, (u_char *) ctx->key.data, ctx->key.len);
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MD5Final(ctx->md5, &md5);
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ngx_md5_text(ctx->file.name.data + ctx->path->name.len + 1 + ctx->path->len,
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ctx->md5);
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ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"file cache uri: %s, md5: %s", ctx->key.data,
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ctx->file.name.data + ctx->path->name.len + 1 + ctx->path->len);
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ngx_create_hashed_filename(&ctx->file, ctx->path);
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ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"file cache name: %s", ctx->file.name.data);
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/* TODO: look open files cache */
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return ngx_http_cache_open_file(ctx, 0);
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}
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int ngx_http_cache_open_file(ngx_http_cache_ctx_t *ctx, ngx_file_uniq_t uniq)
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{
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ssize_t n;
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ngx_err_t err;
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ngx_http_cache_header_t *h;
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ctx->file.fd = ngx_open_file(ctx->file.name.data,
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NGX_FILE_RDONLY, NGX_FILE_OPEN);
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if (ctx->file.fd == NGX_INVALID_FILE) {
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err = ngx_errno;
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if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
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return NGX_DECLINED;
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}
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ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
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ngx_open_file_n " \"%s\" failed", ctx->file.name.data);
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return NGX_ERROR;
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}
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if (uniq) {
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if (ngx_fd_info(ctx->file.fd, &ctx->file.info) == NGX_FILE_ERROR) {
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ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
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ngx_fd_info_n " \"%s\" failed", ctx->file.name.data);
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return NGX_ERROR;
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}
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if (ngx_file_uniq(&ctx->file.info) == uniq) {
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if (ngx_close_file(ctx->file.fd) == NGX_FILE_ERROR) {
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ngx_log_error(NGX_LOG_ALERT, ctx->log, ngx_errno,
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ngx_close_file_n " \"%s\" failed",
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ctx->file.name.data);
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}
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return NGX_HTTP_CACHE_THE_SAME;
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}
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}
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n = ngx_read_file(&ctx->file, ctx->buf->pos,
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ctx->buf->end - ctx->buf->last, 0);
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if (n == NGX_ERROR || n == NGX_AGAIN) {
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return n;
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}
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if (n <= ctx->header_size) {
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ngx_log_error(NGX_LOG_CRIT, ctx->log, 0,
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"cache file \"%s\" is too small", ctx->file.name.data);
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return NGX_ERROR;
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}
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h = (ngx_http_cache_header_t *) ctx->buf->pos;
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ctx->expires = h->expires;
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ctx->last_modified= h->last_modified;
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ctx->date = h->date;
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ctx->length = h->length;
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if (h->key_len > (size_t) (ctx->buf->end - ctx->buf->pos)) {
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ngx_log_error(NGX_LOG_ALERT, ctx->log, 0,
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"cache file \"%s\" is probably invalid",
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ctx->file.name.data);
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return NGX_DECLINED;
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}
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if (ctx->key.len
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&& (h->key_len != ctx->key.len
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|| ngx_strncmp(h->key, ctx->key.data, h->key_len) != 0))
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{
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h->key[h->key_len] = '\0';
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ngx_log_error(NGX_LOG_ALERT, ctx->log, 0,
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"md5 collision: \"%s\" and \"%s\"",
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h->key, ctx->key.data);
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return NGX_DECLINED;
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}
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ctx->buf->last += n;
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if (ctx->expires < ngx_time()) {
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ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ctx->log, 0,
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"http file cache expired");
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return NGX_HTTP_CACHE_STALE;
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}
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/* TODO: NGX_HTTP_CACHE_AGED */
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return NGX_OK;
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}
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int ngx_http_cache_update_file(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx,
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ngx_str_t *temp_file)
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{
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int retry;
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ngx_err_t err;
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retry = 0;
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for ( ;; ) {
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if (ngx_rename_file(temp_file->data, ctx->file.name.data) == NGX_OK) {
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return NGX_OK;
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}
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err = ngx_errno;
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#if (NGX_WIN32)
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if (err == NGX_EEXIST) {
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if (ngx_win32_rename_file(temp_file, &ctx->file.name, r->pool)
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== NGX_ERROR)
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{
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return NGX_ERROR;
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}
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}
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#endif
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if (retry || (err != NGX_ENOENT && err != NGX_ENOTDIR)) {
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ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
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ngx_rename_file_n "(\"%s\", \"%s\") failed",
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temp_file->data, ctx->file.name.data);
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return NGX_ERROR;
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}
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if (ngx_create_path(&ctx->file, ctx->path) == NGX_ERROR) {
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return NGX_ERROR;
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}
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retry = 1;
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}
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}
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int ngx_garbage_collector_http_cache_handler(ngx_gc_t *gc, ngx_str_t *name,
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ngx_dir_t *dir)
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{
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int rc;
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char data[sizeof(ngx_http_cache_header_t)];
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ngx_hunk_t buf;
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ngx_http_cache_ctx_t ctx;
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ctx.file.fd = NGX_INVALID_FILE;
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ctx.file.name = *name;
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ctx.file.log = gc->log;
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ctx.header_size = sizeof(ngx_http_cache_header_t);
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ctx.buf = &buf;
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ctx.log = gc->log;
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ctx.key.len = 0;
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buf.type = NGX_HUNK_IN_MEMORY|NGX_HUNK_TEMP;
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buf.pos = data;
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buf.last = data;
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buf.start = data;
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buf.end = data + sizeof(ngx_http_cache_header_t);
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rc = ngx_http_cache_open_file(&ctx, 0);
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/* TODO: NGX_AGAIN */
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if (rc != NGX_ERROR && rc != NGX_DECLINED && rc != NGX_HTTP_CACHE_STALE) {
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return NGX_OK;
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}
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if (ngx_delete_file(name->data) == NGX_FILE_ERROR) {
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ngx_log_error(NGX_LOG_CRIT, gc->log, ngx_errno,
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ngx_delete_file_n " \"%s\" failed", name->data);
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return NGX_ERROR;
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}
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gc->deleted++;
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gc->freed += ngx_de_size(dir);
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return NGX_OK;
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}
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