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#include <mbgl/storage/asset_file_source.hpp>
#include <mbgl/storage/response.hpp>
#include <mbgl/util/io.hpp>
#include <mbgl/util/run_loop.hpp>
#include <mbgl/util/string.hpp>
#include <mbgl/util/url.hpp>
#include <mbgl/util/util.hpp>
#include <mbgl/actor/actor.hpp>
#include <mbgl/actor/actor_ref.hpp>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
namespace mbgl {
class AssetFileRequest : public AsyncRequest {
public:
AssetFileRequest(std::shared_ptr<FileSource::Callback> callback_)
: callback(std::move(callback_)) {
}
private:
std::shared_ptr<FileSource::Callback> callback;
};
class AssetFileSource::Worker {
public:
Worker(ActorRef<Worker>, ActorRef<AssetFileSource> parent_, std::string root_)
: parent(std::move(parent_)), root(std::move(root_)) {
}
void readFile(const std::string& url, std::weak_ptr<Callback> callback) {
std::string path;
if (url.size() <= 8 || url[8] == '/') {
// This is an empty or absolute path.
path = mbgl::util::percentDecode(url.substr(8));
} else {
// This is a relative path. Prefix with the application root.
path = root + "/" + mbgl::util::percentDecode(url.substr(8));
}
Response response;
struct stat buf;
int result = stat(path.c_str(), &buf);
if (result == 0 && S_ISDIR(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()));
}
}
parent.invoke(&AssetFileSource::respond, callback, response);
}
private:
ActorRef<AssetFileSource> parent;
const std::string root;
};
AssetFileSource::AssetFileSource(Scheduler& scheduler, const std::string& root)
: mailbox(std::make_shared<Mailbox>(*util::RunLoop::Get())),
worker(std::make_unique<Actor<Worker>>(
scheduler, ActorRef<AssetFileSource>(*this, mailbox), root)) {
}
AssetFileSource::~AssetFileSource() = default;
std::unique_ptr<AsyncRequest> AssetFileSource::request(const Resource& resource,
Callback callback) {
auto cb = std::make_shared<Callback>(std::move(callback));
worker->invoke(&Worker::readFile, resource.url, cb);
return std::make_unique<AssetFileRequest>(std::move(cb));
}
void AssetFileSource::respond(std::weak_ptr<Callback> callback, Response response) {
if (auto locked = callback.lock()) {
(*locked)(response);
}
}
} // namespace mbgl
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