- move the chunked decoder to the encoding_api
[m6w6/ext-http] / http_encoding_api.c
index 67c27a1..47f01dd 100644 (file)
 #include "php_http.h"
 #include "php_http_api.h"
 
+ZEND_EXTERN_MODULE_GLOBALS(http);
+
+/* {{{ char *http_encoding_dechunk(char *, size_t, char **, size_t *) */
+PHP_HTTP_API const char *_http_encoding_dechunk(const char *encoded, size_t encoded_len, char **decoded, size_t *decoded_len TSRMLS_DC)
+{
+       const char *e_ptr;
+       char *d_ptr;
+       long rest;
+       
+       *decoded_len = 0;
+       *decoded = ecalloc(1, encoded_len);
+       d_ptr = *decoded;
+       e_ptr = encoded;
+
+       while ((rest = encoded + encoded_len - e_ptr) > 0) {
+               long chunk_len = 0;
+               int EOL_len = 0, eol_mismatch = 0;
+               char *n_ptr;
+
+               chunk_len = strtol(e_ptr, &n_ptr, 16);
+
+               /* check if:
+                * - we could not read in chunk size
+                * - we got a negative chunk size
+                * - chunk size is greater then remaining size
+                * - chunk size is not followed by (CR)LF|NUL
+                */
+               if (    (n_ptr == e_ptr) ||     (chunk_len < 0) || (chunk_len > rest) || 
+                               (*n_ptr && (eol_mismatch = (n_ptr != http_locate_eol(e_ptr, &EOL_len))))) {
+                       /* don't fail on apperently not encoded data */
+                       if (e_ptr == encoded) {
+                               memcpy(*decoded, encoded, encoded_len);
+                               *decoded_len = encoded_len;
+                               return encoded + encoded_len;
+                       } else {
+                               efree(*decoded);
+                               if (eol_mismatch) {
+                                       if (EOL_len == 2) {
+                                               http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Invalid character (expected 0x0D 0x0A; got: 0x%X 0x%X)", *n_ptr, *(n_ptr + 1));
+                                       } else {
+                                               http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Invalid character (expected 0x0A; got: 0x%X)", *n_ptr);
+                                       }
+                               } else {
+                                       char *error = estrndup(n_ptr, strcspn(n_ptr, "\r\n "));
+                                       http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Invalid chunk size: '%s' at pos %d", error, n_ptr - encoded);
+                                       efree(error);
+                               }
+                               return NULL;
+                       }
+               } else {
+                       e_ptr = n_ptr;
+               }
+
+               /* reached the end */
+               if (!chunk_len) {
+                       break;
+               }
+
+               memcpy(d_ptr, e_ptr += EOL_len, chunk_len);
+               d_ptr += chunk_len;
+               e_ptr += chunk_len + EOL_len;
+               *decoded_len += chunk_len;
+       }
+
+       return e_ptr;
+}
+/* }}} */
+
 #ifdef HTTP_HAVE_ZLIB
 #include <zlib.h>
 
 #define HTTP_GZMAXTRY 10
 #define HTTP_GZBUFLEN(l) (l + (l / 1000) + 16 + 1)
 
-ZEND_EXTERN_MODULE_GLOBALS(http);
-
 static const char http_gzencode_header[] = {
        (const char) 0x1f, 
        (const char) 0x8b, 
@@ -194,9 +260,9 @@ PHP_HTTP_API STATUS _http_encoding_gzdecode(const char *data, size_t data_len, c
                        cmp += (unsigned) (data[data_len-6] << 16);
                        cmp += (unsigned) (data[data_len-5] << 24);
                        len  = (unsigned) (data[data_len-4]);
-                       len += (unsigned) (data[data_len-4] << 8);
-                       len += (unsigned) (data[data_len-4] << 16);
-                       len += (unsigned) (data[data_len-4] << 24);
+                       len += (unsigned) (data[data_len-3] << 8);
+                       len += (unsigned) (data[data_len-2] << 16);
+                       len += (unsigned) (data[data_len-1] << 24);
                        
                        if (cmp != crc) {
                                http_error(HE_NOTICE, HTTP_E_ENCODING, "Could not verify data integrity: CRC check failed");