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#include <mbgl/storage/asset_file_source.hpp>
#include <mbgl/storage/file_source_request.hpp>
#include <mbgl/storage/response.hpp>
#include <mbgl/util/string.hpp>
#include <mbgl/util/thread.hpp>
#include <mbgl/util/url.hpp>
#include <mbgl/util/util.hpp>
#include <mbgl/util/io.hpp>
#include <sys/types.h>
#include <sys/stat.h>
namespace {
const std::string assetProtocol = "asset://";
} // namespace
namespace mbgl {
class AssetFileSource::Impl {
public:
Impl(ActorRef<Impl>, std::string root_)
: root(std::move(root_)) {
}
void request(const std::string& url, ActorRef<FileSourceRequest> req) {
Response response;
if (!acceptsURL(url)) {
response.error = std::make_unique<Response::Error>(Response::Error::Reason::Other,
"Invalid asset URL");
req.invoke(&FileSourceRequest::setResponse, response);
return;
}
// Cut off the protocol and prefix with path.
const auto path = root + "/" + mbgl::util::percentDecode(url.substr(assetProtocol.size()));
struct stat buf;
int result = stat(path.c_str(), &buf);
if (result == 0 && (S_IFDIR & buf.st_mode)) {
response.error = std::make_unique<Response::Error>(Response::Error::Reason::NotFound);
} else if (result == -1 && errno == ENOENT) {
response.error = std::make_unique<Response::Error>(Response::Error::Reason::NotFound);
} else {
try {
response.data = std::make_shared<std::string>(util::read_file(path));
} catch (...) {
response.error = std::make_unique<Response::Error>(
Response::Error::Reason::Other,
util::toString(std::current_exception()));
}
}
req.invoke(&FileSourceRequest::setResponse, response);
}
private:
std::string root;
};
AssetFileSource::AssetFileSource(const std::string& root)
: impl(std::make_unique<util::Thread<Impl>>("AssetFileSource", root)) {
}
AssetFileSource::~AssetFileSource() = default;
std::unique_ptr<AsyncRequest> AssetFileSource::request(const Resource& resource, Callback callback) {
auto req = std::make_unique<FileSourceRequest>(std::move(callback));
impl->actor().invoke(&Impl::request, resource.url, req->actor());
return std::move(req);
}
bool AssetFileSource::acceptsURL(const std::string& url) {
return std::equal(assetProtocol.begin(), assetProtocol.end(), url.begin());
}
} // namespace mbgl
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