ngx_int_t
ngx_http_vod_parse_uri_file_name(
ngx_http_request_t* r,
u_char* start_pos,
u_char* end_pos,
uint32_t flags,
request_params_t* result)
{
uint32_t default_tracks_mask;
uint32_t* tracks_mask;
uint32_t* end_mask;
uint32_t* cur_mask;
uint32_t masks_per_sequence;
uint32_t sequence_index;
uint32_t clip_index;
uint32_t media_type;
language_id_t lang_id;
default_tracks_mask = (flags & PARSE_FILE_NAME_MULTI_STREAMS_PER_TYPE) ? 0xffffffff : 1;
for (media_type = 0; media_type < MEDIA_TYPE_COUNT; media_type++)
{
result->tracks_mask[media_type] = default_tracks_mask;
}
result->sequences_mask = 0xffffffff;
result->clip_index = INVALID_CLIP_INDEX;
// segment index
if ((flags & PARSE_FILE_NAME_EXPECT_SEGMENT_INDEX) != 0)
{
if (start_pos < end_pos && *start_pos == '-')
{
start_pos++; // skip the -
}
start_pos = parse_utils_extract_uint32_token(start_pos, end_pos, &result->segment_index);
if (result->segment_index <= 0)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: failed to parse segment index");
return NGX_HTTP_BAD_REQUEST;
}
result->segment_index--; // convert to 0-based
}
skip_dash(start_pos, end_pos);
// clip index
if (*start_pos == 'c')
{
start_pos++; // skip the c
start_pos = parse_utils_extract_uint32_token(start_pos, end_pos, &clip_index);
if (clip_index <= 0)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: failed to parse clip index");
return NGX_HTTP_BAD_REQUEST;
}
result->clip_index = clip_index - 1;
skip_dash(start_pos, end_pos);
}
// sequence id
if (*start_pos == 's')
{
start_pos++; // skip the s
result->sequence_id.data = start_pos;
while (start_pos < end_pos && *start_pos != '-')
{
start_pos++;
}
result->sequence_id.len = start_pos - result->sequence_id.data;
skip_dash(start_pos, end_pos);
}
// sequence (file) index
if (*start_pos == 'f')
{
tracks_mask = result->tracks_mask;
masks_per_sequence = 0;
result->sequences_mask = 0;
for (;;)
{
start_pos++; // skip the f
if (start_pos >= end_pos || *start_pos < '1' || *start_pos > '9')
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: missing index following sequence selector");
return NGX_HTTP_BAD_REQUEST;
}
sequence_index = *start_pos - '0';
start_pos++; // skip the digit
if (start_pos < end_pos && *start_pos >= '0' && *start_pos <= '9')
{
sequence_index = sequence_index * 10 + *start_pos - '0';
if (sequence_index > MAX_SEQUENCES)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: sequence index too big");
return NGX_HTTP_BAD_REQUEST;
}
start_pos++; // skip the digit
}
sequence_index--; // Note: sequence_index cannot be 0 here
result->sequences_mask |= (1 << sequence_index);
skip_dash(start_pos, end_pos);
if (*start_pos == 'v' || *start_pos == 'a')
{
start_pos = ngx_http_vod_extract_track_tokens(
start_pos,
end_pos,
tracks_mask + masks_per_sequence * sequence_index);
if (start_pos == NULL)
{
return NGX_OK;
}
}
if (*start_pos != 'f')
{
break;
}
if (result->sequence_tracks_mask != NULL)
{
continue;
}
// more than one sequence, allocate the per sequence tracks mask
result->sequence_tracks_mask = ngx_palloc(r->pool,
sizeof(result->sequence_tracks_mask[0]) * MEDIA_TYPE_COUNT * MAX_SEQUENCES);
if (result->sequence_tracks_mask == NULL)
{
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: ngx_palloc failed");
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
// initialize the mask with the default
cur_mask = result->sequence_tracks_mask;
end_mask = cur_mask + MEDIA_TYPE_COUNT * MAX_SEQUENCES;
for (; cur_mask < end_mask; cur_mask++)
{
*cur_mask = default_tracks_mask;
}
// copy the currently parsed mask to its place
tracks_mask = result->sequence_tracks_mask + sequence_index * MEDIA_TYPE_COUNT;
ngx_memcpy(tracks_mask, result->tracks_mask, sizeof(tracks_mask[0]) * MEDIA_TYPE_COUNT);
// restore the global mask to the default
for (media_type = 0; media_type < MEDIA_TYPE_COUNT; media_type++)
{
result->tracks_mask[media_type] = default_tracks_mask;
}
// from now on, parse directly to the sequence tracks mask
tracks_mask = result->sequence_tracks_mask;
masks_per_sequence = MEDIA_TYPE_COUNT;
}
}
else if (*start_pos == 'v' || *start_pos == 'a')
{
// tracks
start_pos = ngx_http_vod_extract_track_tokens(start_pos, end_pos, result->tracks_mask);
if (start_pos == NULL)
{
return NGX_OK;
}
}
// languages
if (*start_pos == 'l')
{
result->langs_mask = ngx_pnalloc(r->pool, LANG_MASK_SIZE);
if (result->langs_mask == NULL)
{
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: ngx_pnalloc failed");
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
ngx_memzero(result->langs_mask, LANG_MASK_SIZE);
for (;;)
{
start_pos++; // skip the l
if (start_pos + LANG_ISO639_2_LEN > end_pos)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: language specifier length must be 3 characters");
return NGX_HTTP_BAD_REQUEST;
}
lang_id = lang_parse_iso639_2_code(iso639_2_str_to_int(start_pos));
if (lang_id == 0)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: failed to parse language specifier %*s", (size_t)3, start_pos);
return NGX_HTTP_BAD_REQUEST;
}
vod_set_bit(result->langs_mask, lang_id);
start_pos += LANG_ISO639_2_LEN;
skip_dash(start_pos, end_pos);
if (*start_pos != 'l')
{
break;
}
}
}
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: did not consume the whole name");
return NGX_HTTP_BAD_REQUEST;
}
ngx_int_t
ngx_http_vod_parse_uri_file_name(
ngx_http_request_t* r,
u_char* start_pos,
u_char* end_pos,
uint32_t flags,
request_params_t* result)
{
sequence_tracks_mask_t* sequence_tracks_mask_end;
sequence_tracks_mask_t* sequence_tracks_mask;
ngx_str_t* cur_sequence_id;
ngx_str_t* last_sequence_id;
uint32_t default_tracks_mask;
uint32_t* tracks_mask;
uint32_t segment_index_shift;
uint32_t sequence_index;
uint32_t clip_index;
uint32_t media_type;
uint32_t pts_delay;
uint32_t version;
bool_t tracks_mask_updated;
language_id_t lang_id;
default_tracks_mask = (flags & PARSE_FILE_NAME_MULTI_STREAMS_PER_TYPE) ? 0xffffffff : 1;
for (media_type = 0; media_type < MEDIA_TYPE_COUNT; media_type++)
{
result->tracks_mask[media_type] = default_tracks_mask;
}
result->sequences_mask = 0xffffffff;
result->clip_index = INVALID_CLIP_INDEX;
// segment index
if ((flags & PARSE_FILE_NAME_EXPECT_SEGMENT_INDEX) != 0)
{
if (start_pos < end_pos && *start_pos == '-')
{
start_pos++; // skip the -
}
start_pos = parse_utils_extract_uint32_token(start_pos, end_pos, &result->segment_index);
if (result->segment_index <= 0)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: failed to parse segment index");
return ngx_http_vod_status_to_ngx_error(r, VOD_BAD_REQUEST);
}
result->segment_index--; // convert to 0-based
skip_dash(start_pos, end_pos);
// index shift
if (*start_pos == 'i')
{
start_pos++; // skip the i
start_pos = parse_utils_extract_uint32_token(start_pos, end_pos, &segment_index_shift);
if (segment_index_shift <= 0)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: failed to parse segment index shift");
return ngx_http_vod_status_to_ngx_error(r, VOD_BAD_REQUEST);
}
result->segment_index += segment_index_shift;
skip_dash(start_pos, end_pos);
}
}
else
{
skip_dash(start_pos, end_pos);
}
// clip index
if (*start_pos == 'c' && (flags & PARSE_FILE_NAME_ALLOW_CLIP_INDEX) != 0)
{
start_pos++; // skip the c
start_pos = parse_utils_extract_uint32_token(start_pos, end_pos, &clip_index);
if (clip_index <= 0)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: failed to parse clip index");
return ngx_http_vod_status_to_ngx_error(r, VOD_BAD_REQUEST);
}
result->clip_index = clip_index - 1;
skip_dash(start_pos, end_pos);
}
// sequence (file) index
if (*start_pos == 'f' || *start_pos == 's')
{
result->sequences_mask = 0;
cur_sequence_id = result->sequence_ids;
last_sequence_id = cur_sequence_id + MAX_SEQUENCE_IDS;
sequence_tracks_mask = NULL;
sequence_tracks_mask_end = NULL;
tracks_mask_updated = FALSE;
for (;;)
{
if (*start_pos == 'f')
{
// sequence index
start_pos++; // skip the f
if (start_pos >= end_pos || *start_pos < '1' || *start_pos > '9')
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: missing index following sequence selector");
return ngx_http_vod_status_to_ngx_error(r, VOD_BAD_REQUEST);
}
sequence_index = *start_pos - '0';
start_pos++; // skip the digit
if (start_pos < end_pos && *start_pos >= '0' && *start_pos <= '9')
{
sequence_index = sequence_index * 10 + *start_pos - '0';
if (sequence_index > MAX_SEQUENCES)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: sequence index too big");
return ngx_http_vod_status_to_ngx_error(r, VOD_BAD_REQUEST);
}
start_pos++; // skip the digit
}
sequence_index--; // Note: sequence_index cannot be 0 here
result->sequences_mask |= (1 << sequence_index);
}
else
{
// sequence id
start_pos++; // skip the s
if (cur_sequence_id >= last_sequence_id)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: the number of sequence ids exceeds the limit");
return ngx_http_vod_status_to_ngx_error(r, VOD_BAD_REQUEST);
}
cur_sequence_id->data = start_pos;
while (start_pos < end_pos && *start_pos != '-')
{
start_pos++;
}
cur_sequence_id->len = start_pos - cur_sequence_id->data;
cur_sequence_id++;
sequence_index = -(cur_sequence_id - result->sequence_ids);
}
skip_dash(start_pos, end_pos);
// tracks spec
if (*start_pos == 'v' || *start_pos == 'a')
{
if (sequence_tracks_mask != NULL)
{
if (sequence_tracks_mask >= sequence_tracks_mask_end)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: the number of track specs exceeds the limit");
return ngx_http_vod_status_to_ngx_error(r, VOD_BAD_REQUEST);
}
sequence_tracks_mask->index = sequence_index;
tracks_mask = sequence_tracks_mask->tracks_mask;
sequence_tracks_mask++;
result->sequence_tracks_mask_end = sequence_tracks_mask;
}
else
{
tracks_mask_updated = TRUE;
tracks_mask = result->tracks_mask;
}
start_pos = ngx_http_vod_extract_track_tokens(
start_pos,
end_pos,
tracks_mask);
if (start_pos == NULL)
{
return NGX_OK;
}
}
if (*start_pos != 'f' && *start_pos != 's')
{
break;
}
if (sequence_tracks_mask != NULL)
{
continue;
}
// more than one sequence, allocate the per sequence tracks mask
sequence_tracks_mask = ngx_palloc(r->pool,
sizeof(sequence_tracks_mask[0]) * MAX_SEQUENCE_TRACKS_MASKS);
if (sequence_tracks_mask == NULL)
{
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: ngx_palloc failed");
return ngx_http_vod_status_to_ngx_error(r, VOD_ALLOC_FAILED);
}
sequence_tracks_mask_end = sequence_tracks_mask + MAX_SEQUENCE_TRACKS_MASKS;
result->sequence_tracks_mask = sequence_tracks_mask;
result->sequence_tracks_mask_end = sequence_tracks_mask;
if (tracks_mask_updated)
{
// add the currently parsed mask to the array
sequence_tracks_mask->index = sequence_index;
ngx_memcpy(sequence_tracks_mask->tracks_mask, result->tracks_mask, sizeof(sequence_tracks_mask->tracks_mask));
sequence_tracks_mask++;
result->sequence_tracks_mask_end = sequence_tracks_mask;
// restore the global mask to the default
for (media_type = 0; media_type < MEDIA_TYPE_COUNT; media_type++)
{
result->tracks_mask[media_type] = default_tracks_mask;
}
}
}
}
else if (*start_pos == 'v' || *start_pos == 'a')
{
// tracks
start_pos = ngx_http_vod_extract_track_tokens(start_pos, end_pos, result->tracks_mask);
if (start_pos == NULL)
{
return NGX_OK;
}
}
// pts delay
if (*start_pos == 'p')
{
start_pos++; // skip the p
start_pos = parse_utils_extract_uint32_token(start_pos, end_pos, &pts_delay);
if (pts_delay <= 0)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: failed to parse pts delay");
return ngx_http_vod_status_to_ngx_error(r, VOD_BAD_REQUEST);
}
result->pts_delay = pts_delay;
skip_dash(start_pos, end_pos);
}
// languages
if (*start_pos == 'l')
{
result->langs_mask = ngx_pnalloc(r->pool, LANG_MASK_SIZE);
if (result->langs_mask == NULL)
{
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: ngx_pnalloc failed");
return ngx_http_vod_status_to_ngx_error(r, VOD_ALLOC_FAILED);
}
ngx_memzero(result->langs_mask, LANG_MASK_SIZE);
for (;;)
{
start_pos++; // skip the l
if (start_pos + LANG_ISO639_3_LEN > end_pos)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: language specifier length must be 3 characters");
return ngx_http_vod_status_to_ngx_error(r, VOD_BAD_REQUEST);
}
lang_id = lang_parse_iso639_3_code(iso639_3_str_to_int(start_pos));
if (lang_id == 0)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: failed to parse language specifier %*s", (size_t)3, start_pos);
return ngx_http_vod_status_to_ngx_error(r, VOD_BAD_REQUEST);
}
vod_set_bit(result->langs_mask, lang_id);
start_pos += LANG_ISO639_3_LEN;
skip_dash(start_pos, end_pos);
if (*start_pos != 'l')
{
break;
}
}
}
// version
if (*start_pos == 'x')
{
start_pos++; // skip the x
start_pos = parse_utils_extract_uint32_token(start_pos, end_pos, &version);
if (version <= 0)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: failed to parse version");
return ngx_http_vod_status_to_ngx_error(r, VOD_BAD_REQUEST);
}
result->version = version - 1;
skip_dash(start_pos, end_pos);
}
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_parse_uri_file_name: did not consume the whole name");
return ngx_http_vod_status_to_ngx_error(r, VOD_BAD_REQUEST);
}
