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#include <mbgl/storage/asset_file_source.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>
#include <unistd.h>
namespace mbgl {
class AssetFileSource::Impl {
public:
Impl(const std::string& root_)
: root(root_) {
}
void request(const std::string& url, FileSource::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()));
}
}
callback(response);
}
private:
std::string root;
};
AssetFileSource::AssetFileSource(const std::string& root)
: thread(std::make_unique<util::Thread<Impl>>(
util::ThreadContext{"AssetFileSource", util::ThreadType::Worker, util::ThreadPriority::Regular},
root)) {
}
AssetFileSource::~AssetFileSource() = default;
std::unique_ptr<AsyncRequest> AssetFileSource::request(const Resource& resource, Callback callback) {
return thread->invokeWithCallback(&Impl::request, callback, resource.url);
}
} // namespace mbgl
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