nginx-0.0.1-2003-12-01-19:28:14 import

1 files changed, 225 insertions, 0 deletions

diff --git a/src/http/ngx_http_file_cache.c b/src/http/ngx_http_file_cache.c
new file mode 100644
index 000000000..b8a24dba7
--- /dev/null
+++ b/src/http/ngx_http_file_cache.c
@@ -0,0 +1,225 @@
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_http.h>
+
+
+#include <md5.h>
+
+#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_debug(r->connection->log, "URL: %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_debug(r->connection->log, "FILE: %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_debug(ctx->log, "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;
+}