int EFSConfigurationCreate(uv_file const fd, EFSConfigurationRef *const out) {
assert(out);
if(fd < 0) return UV_EINVAL;
EFSConfigurationRef conf = calloc(1, sizeof(struct EFSConfiguration));
if(!conf) return UV_ENOMEM;
int rc = 0;
uv_buf_t buf[1];
buf->base = malloc(BUF_LEN);
if(!buf->base) { rc = UV_ENOMEM; goto cleanup; }
buf->len = BUF_LEN;
ssize_t len;
int64_t pos = 0;
for(;;) {
len = async_fs_read(fd, buf, 1, pos);
if(len < 0) { rc = len; goto cleanup; }
}
*out = conf;
cleanup:
if(rc < 0) EFSConfigurationFree(&conf);
return rc;
}
ssize_t async_fs_readall_simple(uv_file const file, uv_buf_t const *const buf) {
async_pool_enter(NULL);
size_t pos = 0;
ssize_t rc;
for(;;) {
uv_buf_t b2 = uv_buf_init(buf->base+pos, buf->len-pos);
rc = async_fs_read(file, &b2, 1, -1);
if(rc < 0) break;
if(0 == rc) { rc = pos; break; }
pos += rc;
if(pos >= buf->len) { rc = pos; break; }
}
async_pool_leave(NULL);
return rc;
}
int SLNSubmissionParseMetaFile(SLNSubmissionRef const sub, uint64_t const fileID, DB_txn *const txn, uint64_t *const out) {
assert(out);
if(!sub) return DB_EINVAL;
if(!fileID) return DB_EINVAL;
if(!txn) return DB_EINVAL;
strarg_t const type = SLNSubmissionGetType(sub);
if(!type) return 0;
if(0 != strcasecmp(SLN_META_TYPE, type) &&
0 != strcasecmp("text/x-sln-meta+json; charset=utf-8", type) &&
0 != strcasecmp("text/efs-meta+json; charset=utf-8", type)) return 0;
// TODO: Get rid of these obsolete types.
uv_file const fd = SLNSubmissionGetFile(sub);
if(fd < 0) return DB_EINVAL;
int rc = 0;
uv_buf_t buf[1] = {};
DB_txn *subtxn = NULL;
parser_t ctx[1] = {};
yajl_handle parser = NULL;
buf->base = malloc(BUF_LEN);
if(!buf->base) { rc = DB_ENOMEM; goto cleanup; }
buf->len = URI_MAX;
int64_t pos = 0;
ssize_t len = async_fs_read(fd, buf, 1, pos);
if(len < 0) {
fprintf(stderr, "Submission meta-file read error (%s)\n", sln_strerror(len));
rc = DB_EIO;
goto cleanup;
}
size_t i;
for(i = 0; i < len; i++) {
char const c = buf->base[i];
if('\r' == c || '\n' == c) break;
}
if(i >= len) {
fprintf(stderr, "Submission meta-file parse error (invalid target URI)\n");
rc = DB_EIO;
goto cleanup;
}
assert(i < len);
str_t targetURI[URI_MAX];
memcpy(targetURI, buf->base, i);
targetURI[i] = '\0';
pos += i;
// TODO: Support sub-transactions in LevelDB backend.
// TODO: db_txn_begin should support NULL env.
// rc = db_txn_begin(NULL, txn, DB_RDWR, &subtxn);
// if(rc < 0) goto cleanup;
subtxn = txn;
uint64_t const metaFileID = add_metafile(subtxn, fileID, targetURI);
if(!metaFileID) goto cleanup;
// Duplicate meta-file, not an error.
// TODO: Unless the previous version wasn't actually a meta-file.
ctx->txn = subtxn;
ctx->metaFileID = metaFileID;
ctx->targetURI = targetURI;
ctx->depth = -1;
parser = yajl_alloc(&callbacks, NULL, ctx);
if(!parser) rc = DB_ENOMEM;
if(rc < 0) goto cleanup;
yajl_config(parser, yajl_allow_partial_values, (int)true);
yajl_status status = yajl_status_ok;
for(;;) {
buf->len = MIN(BUF_LEN, PARSE_MAX-pos);
if(!buf->len) break;
len = async_fs_read(fd, buf, 1, pos);
if(len < 0) {
fprintf(stderr, "Submission meta-file read error (%s)\n", sln_strerror(len));
rc = DB_EIO;
goto cleanup;
}
if(0 == len) break;
status = yajl_parse(parser, (byte_t const *)buf->base, len);
if(yajl_status_ok != status) break;
pos += len;
}
status = yajl_complete_parse(parser);
if(yajl_status_ok != status) {
unsigned char *msg = yajl_get_error(parser, true, (byte_t const *)buf->base, len);
fprintf(stderr, "%s", msg);
yajl_free_error(parser, msg); msg = NULL;
rc = DB_EIO;
goto cleanup;
}
assert(-1 == ctx->depth);
// rc = db_txn_commit(subtxn); subtxn = NULL;
if(rc < 0) goto cleanup;
*out = metaFileID;
cleanup:
// db_txn_abort(subtxn); subtxn = NULL;
FREE(&buf->base);
if(parser) yajl_free(parser); parser = NULL;
assert_zeroed(ctx->fields, DEPTH_MAX);
return rc;
}
