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