react-native/ReactCommon/cxxreact/Executor.cpp

83 lines
2.5 KiB
C++

// Copyright 2004-present Facebook. All Rights Reserved.
#include "Executor.h"
#include <errno.h>
#include <fcntl.h>
#include <fstream>
#include <stdio.h>
#include <sys/stat.h>
#include <folly/Memory.h>
#include <folly/ScopeGuard.h>
namespace facebook {
namespace react {
void JSExecutor::loadApplicationScript(std::string bundlePath, std::string sourceURL, int flags) {
if ((flags & UNPACKED_JS_SOURCE) == 0) {
throw std::runtime_error("No unpacked js source file");
}
return loadApplicationScript(
JSBigOptimizedBundleString::fromOptimizedBundle(bundlePath),
std::move(sourceURL));
}
void JSExecutor::loadApplicationScript(int fd, std::string sourceURL) {
struct stat fileInfo;
folly::checkUnixError(::fstat(fd, &fileInfo), "fstat on bundle failed.");
auto bundle = folly::make_unique<JSBigFileString>(fd, fileInfo.st_size);
return loadApplicationScript(std::move(bundle), std::move(sourceURL));
}
static JSBigOptimizedBundleString::Encoding encodingFromByte(uint8_t byte) {
switch (byte) {
case 0:
return JSBigOptimizedBundleString::Encoding::Unknown;
case 1:
return JSBigOptimizedBundleString::Encoding::Ascii;
case 2:
return JSBigOptimizedBundleString::Encoding::Utf8;
case 3:
return JSBigOptimizedBundleString::Encoding::Utf16;
default:
throw std::invalid_argument("Unknown bundle encoding");
}
}
std::unique_ptr<const JSBigOptimizedBundleString> JSBigOptimizedBundleString::fromOptimizedBundle(
const std::string& bundlePath) {
uint8_t sha1[20];
uint8_t encoding;
struct stat fileInfo;
int fd = -1;
SCOPE_EXIT { CHECK(fd == -1 || ::close(fd) == 0); };
{
auto metaPath = bundlePath + UNPACKED_META_PATH_SUFFIX;
std::ifstream metaFile;
metaFile.exceptions(std::ifstream::eofbit | std::ifstream::failbit | std::ifstream::badbit);
metaFile.open(metaPath, std::ifstream::in | std::ifstream::binary);
metaFile.read(reinterpret_cast<char*>(sha1), sizeof(sha1));
metaFile.read(reinterpret_cast<char*>(&encoding), sizeof(encoding));
}
{
auto sourcePath = bundlePath + UNPACKED_JS_SOURCE_PATH_SUFFIX;
fd = ::open(sourcePath.c_str(), O_RDONLY);
folly::checkUnixError(fd, "could not open js bundle file.");
}
folly::checkUnixError(::fstat(fd, &fileInfo), "fstat on js bundle failed.");
return folly::make_unique<const JSBigOptimizedBundleString>(
fd,
fileInfo.st_size,
sha1,
encodingFromByte(encoding));
}
} // namespace react
} // namespace facebook