std::multimap< std::string, std::string > Hpack_index_table::hpack_decode(const unsigned char* s, int len) {
if(!hpack_inited)
init_hpack();
int i = 0;
std::multimap<std::string, std::string> headers;
bool noDynamic = false;
while(i < len) {
if(s[i] & 0x80) {
noDynamic = true;
uint32_t index;
i += integer_decode(s+i, 7, &index);
const Hpack_index *value = getvalue(index);
if(value == nullptr){
LOGE("get null index from %d\n", index);
throw ERR_COMPRESSION_ERROR;
}
headers.insert(std::make_pair(value->name, value->value));
}else if(s[i] & 0x40) {
noDynamic = true;
uint32_t index;
i += integer_decode(s+i, 6, &index);
std::string name, value;
if(index) {
name = getvalue(index)->name;
} else {
i += literal_decode(s+i, name);
}
i += literal_decode(s+i, value);
headers.insert(std::make_pair(name, value));
add_dynamic_table(name, value);
}else if(s[i] & 0x20) {
if(noDynamic){
LOGE("found update dynamic talbe limit after normal entry\n");
throw ERR_COMPRESSION_ERROR;
}
uint32_t size;
i += integer_decode(s+i, 5, &size);
set_dynamic_table_size_limit(size);
}else {
noDynamic = true;
uint32_t index;
i += integer_decode(s+i, 4, &index);
std::string name, value;
if(index) {
name = getvalue(index)->name;
} else {
i += literal_decode(s+i, name);
}
i += literal_decode(s+i, value);
headers.insert(std::make_pair(name, value));
}
if(i > len){
LOGE("may be overflow: %d/%d\n", i, len);
throw ERR_COMPRESSION_ERROR;
}
}
//evict_dynamic_table();
return headers;
}
int
_cdk_filter_literal( void * opaque, int ctl, FILE * in, FILE * out )
{
if( ctl == STREAMCTL_READ )
return literal_decode( opaque, in, out );
else if( ctl == STREAMCTL_WRITE )
return literal_encode( opaque, in, out );
else if( ctl == STREAMCTL_FREE ) {
literal_filter_t * pfx = opaque;
if( pfx ) {
cdk_free( pfx->filename );
pfx->filename = NULL;
}
}
return CDK_Inv_Mode;
}
int
_cdk_filter_literal (void *data, int ctl, FILE * in, FILE * out)
{
if (ctl == STREAMCTL_READ)
return literal_decode (data, in, out);
else if (ctl == STREAMCTL_WRITE)
return literal_encode (data, in, out);
else if (ctl == STREAMCTL_FREE)
{
literal_filter_t *pfx = data;
if (pfx)
{
_cdk_log_debug ("free literal filter\n");
cdk_free (pfx->filename);
pfx->filename = NULL;
cdk_free (pfx->orig_filename);
pfx->orig_filename = NULL;
return 0;
}
}
return CDK_Inv_Mode;
}