#ifndef PHP_HTTP_CACHE_API_H
#define PHP_HTTP_CACHE_API_H
+#include "zend_ini.h"
+
+#include "ext/standard/md5.h"
+#include "ext/standard/sha1.h"
+
#include "php_http_std_defs.h"
+#include "php_http.h"
#include "php_http_api.h"
#include "php_http_send_api.h"
+#ifdef HAVE_LIBMHASH
+# include <mhash.h>
+#endif
+
+ZEND_EXTERN_MODULE_GLOBALS(http);
+
+typedef enum {
+ HTTP_ETAG_MD5 = -2,
+ HTTP_ETAG_SHA1 = -1,
+ HTTP_ETAG_MHASH = 0,
+} http_etag_mode;
+
+#ifdef HAVE_LIBMHASH
+static void *http_etag_alloc_mhash_digest(size_t size)
+{
+ return emalloc(size);
+}
+#endif
+
+#define http_etag_digest(d, l) _http_etag_digest((d), (l) TSRMLS_CC)
+static inline char *_http_etag_digest(const unsigned char *digest, int len TSRMLS_DC)
+{
+ int i;
+ char *hex = emalloc(len * 2 + 1);
+ char *ptr = hex;
+
+ /* optimize this --
+ look at apache's make_etag */
+ for (i = 0; i < len; ++i) {
+ sprintf(ptr, "%02x", digest[i]);
+ ptr += 2;
+ }
+ *ptr = '\0';
+
+ return hex;
+}
+
+#define http_etag_init() _http_etag_init(TSRMLS_C)
+static inline void *_http_etag_init(TSRMLS_D)
+{
+ void *ctx = NULL;
+ long mode = INI_INT("http.etag_mode");
+
+ switch (mode)
+ {
+ case HTTP_ETAG_SHA1:
+ PHP_SHA1Init(ctx = emalloc(sizeof(PHP_SHA1_CTX)));
+ break;
+
+ case HTTP_ETAG_MD5:
+#ifndef HAVE_LIBMHASH
+ default:
+#endif
+ PHP_MD5Init(ctx = emalloc(sizeof(PHP_MD5_CTX)));
+ break;
+
+#ifdef HAVE_LIBMHASH
+ default:
+ if ((mode < 0) || ((ulong)mode > mhash_count()) || (!(ctx = mhash_init(mode)))) {
+ http_error_ex(HE_ERROR, HTTP_E_RUNTIME, "Invalid ETag mode: %ld", mode);
+ }
+ break;
+#endif
+ }
+
+ return ctx;
+}
+
+#define http_etag_finish(c) _http_etag_finish((c) TSRMLS_CC)
+static inline char *_http_etag_finish(void *ctx TSRMLS_DC)
+{
+ char *etag = NULL;
+ unsigned char digest[20];
+ long mode = INI_INT("http.etag_mode");
+
+ switch (mode)
+ {
+ case HTTP_ETAG_SHA1:
+ PHP_SHA1Final(digest, ctx);
+ etag = http_etag_digest(digest, 20);
+ efree(ctx);
+ break;
+
+ case HTTP_ETAG_MD5:
+#ifndef HAVE_LIBMHASH
+ default:
+#endif
+ PHP_MD5Final(digest, ctx);
+ etag = http_etag_digest(digest, 16);
+ efree(ctx);
+ break;
+
+#ifdef HAVE_LIBMHASH
+ default:
+ {
+ unsigned char *mhash_digest = mhash_end_m(ctx, http_etag_alloc_mhash_digest);
+ etag = http_etag_digest(mhash_digest, mhash_get_block_size(mode));
+ efree(mhash_digest);
+ }
+ break;
+#endif
+ }
+
+ return etag;
+}
+
+#define http_etag_update(c, d, l) _http_etag_update((c), (d), (l) TSRMLS_CC)
+static inline void _http_etag_update(void *ctx, const char *data_ptr, size_t data_len TSRMLS_DC)
+{
+ switch (INI_INT("http.etag_mode"))
+ {
+ case HTTP_ETAG_SHA1:
+ PHP_SHA1Update(ctx, data_ptr, data_len);
+ break;
+
+ case HTTP_ETAG_MD5:
+#ifndef HAVE_LIBMHASH
+ default:
+#endif
+ PHP_MD5Update(ctx, data_ptr, data_len);
+ break;
+
+#ifdef HAVE_LIBMHASH
+ default:
+ mhash(ctx, data_ptr, data_len);
+ break;
+#endif
+ }
+}
+
#define http_etag(p, l, m) _http_etag((p), (l), (m) TSRMLS_CC)
PHP_HTTP_API char *_http_etag(const void *data_ptr, size_t data_len, http_send_mode data_mode TSRMLS_DC);