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|
/*
+--------------------------------------------------------------------+
| PECL :: http |
+--------------------------------------------------------------------+
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the conditions mentioned |
| in the accompanying LICENSE file are met. |
+--------------------------------------------------------------------+
| Copyright (c) 2004-2014, Michael Wallner <mike@php.net> |
+--------------------------------------------------------------------+
*/
#include "php_http_api.h"
typedef struct php_http_header_parser_state_spec {
php_http_header_parser_state_t state;
unsigned need_data:1;
} php_http_header_parser_state_spec_t;
static const php_http_header_parser_state_spec_t php_http_header_parser_states[] = {
{PHP_HTTP_HEADER_PARSER_STATE_START, 1},
{PHP_HTTP_HEADER_PARSER_STATE_KEY, 1},
{PHP_HTTP_HEADER_PARSER_STATE_VALUE, 1},
{PHP_HTTP_HEADER_PARSER_STATE_VALUE_EX, 1},
{PHP_HTTP_HEADER_PARSER_STATE_HEADER_DONE, 0},
{PHP_HTTP_HEADER_PARSER_STATE_DONE, 0}
};
php_http_header_parser_t *php_http_header_parser_init(php_http_header_parser_t *parser TSRMLS_DC)
{
if (!parser) {
parser = emalloc(sizeof(*parser));
}
memset(parser, 0, sizeof(*parser));
TSRMLS_SET_CTX(parser->ts);
return parser;
}
php_http_header_parser_state_t php_http_header_parser_state_push(php_http_header_parser_t *parser, unsigned argc, ...)
{
va_list va_args;
unsigned i;
php_http_header_parser_state_t state = 0;
va_start(va_args, argc);
for (i = 0; i < argc; ++i) {
state = va_arg(va_args, php_http_header_parser_state_t);
zend_stack_push(&parser->stack, &state, sizeof(state));
}
va_end(va_args);
return state;
}
php_http_header_parser_state_t php_http_header_parser_state_is(php_http_header_parser_t *parser)
{
php_http_header_parser_state_t *state;
if (SUCCESS == zend_stack_top(&parser->stack, (void *) &state)) {
return *state;
}
return PHP_HTTP_HEADER_PARSER_STATE_START;
}
php_http_header_parser_state_t php_http_header_parser_state_pop(php_http_header_parser_t *parser)
{
php_http_header_parser_state_t state, *state_ptr;
if (SUCCESS == zend_stack_top(&parser->stack, (void *) &state_ptr)) {
state = *state_ptr;
zend_stack_del_top(&parser->stack);
return state;
}
return PHP_HTTP_HEADER_PARSER_STATE_START;
}
void php_http_header_parser_dtor(php_http_header_parser_t *parser)
{
zend_stack_destroy(&parser->stack);
php_http_info_dtor(&parser->info);
STR_FREE(parser->_key.str);
STR_FREE(parser->_val.str);
}
void php_http_header_parser_free(php_http_header_parser_t **parser)
{
if (*parser) {
php_http_header_parser_dtor(*parser);
efree(*parser);
*parser = NULL;
}
}
STATUS php_http_header_parser_parse(php_http_header_parser_t *parser, php_http_buffer_t *buffer, unsigned flags, HashTable *headers, php_http_info_callback_t callback_func, void *callback_arg)
{
TSRMLS_FETCH_FROM_CTX(parser->ts);
while (buffer->used || !php_http_header_parser_states[php_http_header_parser_state_is(parser)].need_data) {
#if 0
const char *state[] = {"START", "KEY", "VALUE", "HEADER_DONE", "DONE"};
fprintf(stderr, "#HP: %s (avail:%zu, num:%d)\n", php_http_header_parser_state_is(parser) < 0 ? "FAILURE" : state[php_http_header_parser_state_is(parser)], buffer->used, headers?zend_hash_num_elements(headers):0);
_dpf(0, buffer->data, buffer->used);
#endif
switch (php_http_header_parser_state_pop(parser)) {
case PHP_HTTP_HEADER_PARSER_STATE_FAILURE:
return php_http_header_parser_state_push(parser, 1, PHP_HTTP_HEADER_PARSER_STATE_FAILURE);
case PHP_HTTP_HEADER_PARSER_STATE_START: {
char *ptr = buffer->data;
while (ptr - buffer->data < buffer->used && PHP_HTTP_IS_CTYPE(space, *ptr)) {
++ptr;
}
php_http_buffer_cut(buffer, 0, ptr - buffer->data);
php_http_header_parser_state_push(parser, 1, PHP_HTTP_HEADER_PARSER_STATE_KEY);
break;
}
case PHP_HTTP_HEADER_PARSER_STATE_KEY: {
const char *colon, *eol_str = NULL;
int eol_len = 0;
if (buffer->data == (eol_str = php_http_locate_bin_eol(buffer->data, buffer->used, &eol_len))) {
/* end of headers */
php_http_buffer_cut(buffer, 0, eol_len);
php_http_header_parser_state_push(parser, 1, PHP_HTTP_HEADER_PARSER_STATE_DONE);
} else if (php_http_info_parse(&parser->info, php_http_buffer_fix(buffer)->data TSRMLS_CC)) {
/* new message starting with request/response line */
if (callback_func) {
callback_func(callback_arg, &headers, &parser->info TSRMLS_CC);
}
php_http_info_dtor(&parser->info);
php_http_buffer_cut(buffer, 0, eol_str + eol_len - buffer->data);
php_http_header_parser_state_push(parser, 1, PHP_HTTP_HEADER_PARSER_STATE_HEADER_DONE);
} else if ((colon = memchr(buffer->data, ':', buffer->used)) && (!eol_str || eol_str > colon)) {
/* header: string */
parser->_key.str = estrndup(buffer->data, parser->_key.len = colon - buffer->data);
while (PHP_HTTP_IS_CTYPE(space, *++colon) && *colon != '\n' && *colon != '\r');
php_http_buffer_cut(buffer, 0, colon - buffer->data);
php_http_header_parser_state_push(parser, 1, PHP_HTTP_HEADER_PARSER_STATE_VALUE);
} else {
/* neither reqeust/response line nor header: string */
return php_http_header_parser_state_push(parser, 1, PHP_HTTP_HEADER_PARSER_STATE_FAILURE);
}
break;
}
case PHP_HTTP_HEADER_PARSER_STATE_VALUE: {
const char *eol_str;
int eol_len;
#define SET_ADD_VAL(slen, eol_len) \
do { \
const char *ptr = buffer->data; \
size_t len = slen; \
\
while (len > 0 && PHP_HTTP_IS_CTYPE(space, *ptr)) { \
++ptr; \
--len; \
} \
while (len > 0 && PHP_HTTP_IS_CTYPE(space, ptr[len - 1])) { \
--len; \
} \
\
if (len > 0) { \
if (parser->_val.str) { \
parser->_val.str = erealloc(parser->_val.str, parser->_val.len + len + 2); \
parser->_val.str[parser->_val.len++] = ' '; \
memcpy(&parser->_val.str[parser->_val.len], ptr, len); \
parser->_val.len += len; \
parser->_val.str[parser->_val.len] = '\0'; \
} else { \
parser->_val.len = len; \
parser->_val.str = estrndup(ptr, len); \
} \
} \
php_http_buffer_cut(buffer, 0, slen + eol_len); \
} while (0)
if ((eol_str = php_http_locate_bin_eol(buffer->data, buffer->used, &eol_len))) {
SET_ADD_VAL(eol_str - buffer->data, eol_len);
if (buffer->used) {
if (*buffer->data != '\t' && *buffer->data != ' ') {
php_http_header_parser_state_push(parser, 1, PHP_HTTP_HEADER_PARSER_STATE_HEADER_DONE);
break;
} else {
php_http_header_parser_state_push(parser, 1, PHP_HTTP_HEADER_PARSER_STATE_VALUE);
break;
}
}
}
if (flags & PHP_HTTP_HEADER_PARSER_CLEANUP) {
if (buffer->used) {
SET_ADD_VAL(buffer->used, 0);
}
php_http_header_parser_state_push(parser, 1, PHP_HTTP_HEADER_PARSER_STATE_HEADER_DONE);
} else {
return php_http_header_parser_state_push(parser, 1, PHP_HTTP_HEADER_PARSER_STATE_VALUE_EX);
}
break;
}
case PHP_HTTP_HEADER_PARSER_STATE_VALUE_EX:
if (*buffer->data == ' ' || *buffer->data == '\t') {
php_http_header_parser_state_push(parser, 1, PHP_HTTP_HEADER_PARSER_STATE_VALUE);
} else {
php_http_header_parser_state_push(parser, 1, PHP_HTTP_HEADER_PARSER_STATE_HEADER_DONE);
}
break;
case PHP_HTTP_HEADER_PARSER_STATE_HEADER_DONE:
if (parser->_key.str && parser->_val.str) {
zval array, **exist;
if (!headers && callback_func) {
callback_func(callback_arg, &headers, NULL TSRMLS_CC);
}
INIT_PZVAL_ARRAY(&array, headers);
php_http_pretty_key(parser->_key.str, parser->_key.len, 1, 1);
if (SUCCESS == zend_symtable_find(headers, parser->_key.str, parser->_key.len + 1, (void *) &exist)) {
convert_to_array(*exist);
add_next_index_stringl(*exist, parser->_val.str, parser->_val.len, 0);
} else {
add_assoc_stringl_ex(&array, parser->_key.str, parser->_key.len + 1, parser->_val.str, parser->_val.len, 0);
}
parser->_val.str = NULL;
}
STR_SET(parser->_key.str, NULL);
STR_SET(parser->_val.str, NULL);
php_http_header_parser_state_push(parser, 1, PHP_HTTP_HEADER_PARSER_STATE_KEY);
break;
case PHP_HTTP_HEADER_PARSER_STATE_DONE:
return PHP_HTTP_HEADER_PARSER_STATE_DONE;
}
}
return php_http_header_parser_state_is(parser);
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: noet sw=4 ts=4 fdm=marker
* vim<600: noet sw=4 ts=4
*/
|
