Merge commit 'c992cb4e42cc223f67ede0e48d7ff3f4947af0c6' as 'test/compatibility/C/uWebSockets'
This commit is contained in:
Benjamin Sergeant
@@ -0,0 +1,130 @@
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#include <map>
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#include <cstring>
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#include <fstream>
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#include <sstream>
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#include <iostream>
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#include <future>
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/* This is just a very simple and inefficient demo of async responses,
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* please do roll your own variant or use a database or Node.js's async
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* features instead of this really bad demo */
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struct AsyncFileReader {
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private:
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/* The cache we have in memory for this file */
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std::string cache;
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int cacheOffset;
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bool hasCache;
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/* The pending async file read (yes we only support one pending read) */
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std::function<void(std::string_view)> pendingReadCb;
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int fileSize;
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std::string fileName;
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std::ifstream fin;
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uWS::Loop *loop;
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public:
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/* Construct a demo async. file reader for fileName */
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AsyncFileReader(std::string fileName) : fileName(fileName) {
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fin.open(fileName, std::ios::binary);
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// get fileSize
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fin.seekg(0, fin.end);
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fileSize = fin.tellg();
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//std::cout << "File size is: " << fileSize << std::endl;
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// cache up 1 mb!
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cache.resize(1024 * 1024);
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//std::cout << "Caching 1 MB at offset = " << 0 << std::endl;
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fin.seekg(0, fin.beg);
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fin.read(cache.data(), cache.length());
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cacheOffset = 0;
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hasCache = true;
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// get loop for thread
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loop = uWS::Loop::get();
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}
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/* Returns any data already cached for this offset */
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std::string_view peek(int offset) {
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/* Did we hit the cache? */
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if (hasCache && offset >= cacheOffset && ((offset - cacheOffset) < cache.length())) {
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/* Cache hit */
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//std::cout << "Cache hit!" << std::endl;
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/*if (fileSize - offset < cache.length()) {
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std::cout << "LESS THAN WHAT WE HAVE!" << std::endl;
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}*/
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int chunkSize = std::min<int>(fileSize - offset, cache.length() - offset + cacheOffset);
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return std::string_view(cache.data() + offset - cacheOffset, chunkSize);
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} else {
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/* Cache miss */
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//std::cout << "Cache miss!" << std::endl;
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return std::string_view(nullptr, 0);
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}
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}
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/* Asynchronously request more data at offset */
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void request(int offset, std::function<void(std::string_view)> cb) {
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// in this case, what do we do?
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// we need to queue up this chunk request and callback!
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// if queue is full, either block or close the connection via abort!
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if (!hasCache) {
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// already requesting a chunk!
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std::cout << "ERROR: already requesting a chunk!" << std::endl;
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return;
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}
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// disable cache
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hasCache = false;
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std::async(std::launch::async, [this, cb, offset]() {
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//std::cout << "ASYNC Caching 1 MB at offset = " << offset << std::endl;
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// den har stängts! öppna igen!
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if (!fin.good()) {
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fin.close();
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//std::cout << "Reopening fin!" << std::endl;
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fin.open(fileName, std::ios::binary);
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}
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fin.seekg(offset, fin.beg);
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fin.read(cache.data(), cache.length());
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cacheOffset = offset;
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loop->defer([this, cb, offset]() {
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int chunkSize = std::min<int>(cache.length(), fileSize - offset);
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// båda dessa sker, wtf?
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if (chunkSize == 0) {
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std::cout << "Zero size!?" << std::endl;
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}
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if (chunkSize != cache.length()) {
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std::cout << "LESS THAN A CACHE 1 MB!" << std::endl;
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}
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hasCache = true;
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cb(std::string_view(cache.data(), chunkSize));
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});
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});
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}
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/* Abort any pending async. request */
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void abort() {
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}
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int getFileSize() {
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return fileSize;
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}
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};
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@@ -0,0 +1,84 @@
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#include <filesystem>
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struct AsyncFileStreamer {
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std::map<std::string_view, AsyncFileReader *> asyncFileReaders;
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std::string root;
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AsyncFileStreamer(std::string root) : root(root) {
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// for all files in this path, init the map of AsyncFileReaders
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updateRootCache();
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}
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void updateRootCache() {
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// todo: if the root folder changes, we want to reload the cache
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for(auto &p : std::filesystem::recursive_directory_iterator(root)) {
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std::string url = p.path().string().substr(root.length());
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if (url == "/index.html") {
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url = "/";
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}
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char *key = new char[url.length()];
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memcpy(key, url.data(), url.length());
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asyncFileReaders[std::string_view(key, url.length())] = new AsyncFileReader(p.path().string());
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}
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}
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template <bool SSL>
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void streamFile(uWS::HttpResponse<SSL> *res, std::string_view url) {
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auto it = asyncFileReaders.find(url);
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if (it == asyncFileReaders.end()) {
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std::cout << "Did not find file: " << url << std::endl;
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} else {
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streamFile(res, it->second);
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}
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}
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template <bool SSL>
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static void streamFile(uWS::HttpResponse<SSL> *res, AsyncFileReader *asyncFileReader) {
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/* Peek from cache */
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std::string_view chunk = asyncFileReader->peek(res->getWriteOffset());
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if (!chunk.length() || res->tryEnd(chunk, asyncFileReader->getFileSize()).first) {
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/* Request new chunk */
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// todo: we need to abort this callback if peer closed!
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// this also means Loop::defer needs to support aborting (functions should embedd an atomic boolean abort or something)
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// Loop::defer(f) -> integer
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// Loop::abort(integer)
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// hmm? no?
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// us_socket_up_ref eftersom vi delar ägandeskapet
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if (chunk.length() < asyncFileReader->getFileSize()) {
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asyncFileReader->request(res->getWriteOffset(), [res, asyncFileReader](std::string_view chunk) {
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// check if we were closed in the mean time
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//if (us_socket_is_closed()) {
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// free it here
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//return;
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//}
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/* We were aborted for some reason */
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if (!chunk.length()) {
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// todo: make sure to check for is_closed internally after all callbacks!
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res->close();
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} else {
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AsyncFileStreamer::streamFile(res, asyncFileReader);
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}
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});
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}
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} else {
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/* We failed writing everything, so let's continue when we can */
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res->onWritable([res, asyncFileReader](int offset) {
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// här kan skiten avbrytas!
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AsyncFileStreamer::streamFile(res, asyncFileReader);
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// todo: I don't really know what this is supposed to mean?
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return false;
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})->onAborted([]() {
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std::cout << "ABORTED!" << std::endl;
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});
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}
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}
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};
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@@ -0,0 +1,19 @@
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/* Middleware to fill out content-type */
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inline bool hasExt(std::string_view file, std::string_view ext) {
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if (ext.size() > file.size()) {
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return false;
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}
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return std::equal(ext.rbegin(), ext.rend(), file.rbegin());
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}
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/* This should be a filter / middleware like app.use(handler) */
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template <bool SSL>
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uWS::HttpResponse<SSL> *serveFile(uWS::HttpResponse<SSL> *res, uWS::HttpRequest *req) {
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res->writeStatus(uWS::HTTP_200_OK);
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if (hasExt(req->getUrl(), ".svg")) {
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res->writeHeader("Content-Type", "image/svg+xml");
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}
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return res;
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}
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407
test/compatibility/C/uWebSockets/examples/helpers/optparse.h
Normal file
407
test/compatibility/C/uWebSockets/examples/helpers/optparse.h
Normal file
@@ -0,0 +1,407 @@
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/* Nicked from third-party https://github.com/skeeto/optparse 2018-09-24 */
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/* µWebSockets is not the origin of this software file */
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/* ------------------------------------------------------ */
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/* Optparse --- portable, reentrant, embeddable, getopt-like option parser
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*
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* This is free and unencumbered software released into the public domain.
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*
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* To get the implementation, define OPTPARSE_IMPLEMENTATION.
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* Optionally define OPTPARSE_API to control the API's visibility
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* and/or linkage (static, __attribute__, __declspec).
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*
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* The POSIX getopt() option parser has three fatal flaws. These flaws
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* are solved by Optparse.
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*
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* 1) Parser state is stored entirely in global variables, some of
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* which are static and inaccessible. This means only one thread can
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* use getopt(). It also means it's not possible to recursively parse
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* nested sub-arguments while in the middle of argument parsing.
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* Optparse fixes this by storing all state on a local struct.
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*
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* 2) The POSIX standard provides no way to properly reset the parser.
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* This means for portable code that getopt() is only good for one
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* run, over one argv with one option string. It also means subcommand
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* options cannot be processed with getopt(). Most implementations
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* provide a method to reset the parser, but it's not portable.
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* Optparse provides an optparse_arg() function for stepping over
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* subcommands and continuing parsing of options with another option
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* string. The Optparse struct itself can be passed around to
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* subcommand handlers for additional subcommand option parsing. A
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* full reset can be achieved by with an additional optparse_init().
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*
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* 3) Error messages are printed to stderr. This can be disabled with
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* opterr, but the messages themselves are still inaccessible.
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* Optparse solves this by writing an error message in its errmsg
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* field. The downside to Optparse is that this error message will
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* always be in English rather than the current locale.
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*
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* Optparse should be familiar with anyone accustomed to getopt(), and
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* it could be a nearly drop-in replacement. The option string is the
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* same and the fields have the same names as the getopt() global
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* variables (optarg, optind, optopt).
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*
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* Optparse also supports GNU-style long options with optparse_long().
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* The interface is slightly different and simpler than getopt_long().
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*
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* By default, argv is permuted as it is parsed, moving non-option
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* arguments to the end. This can be disabled by setting the `permute`
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* field to 0 after initialization.
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*/
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#ifndef OPTPARSE_H
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#define OPTPARSE_H
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#ifndef OPTPARSE_API
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# define OPTPARSE_API
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#endif
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struct optparse {
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char **argv;
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int permute;
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int optind;
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int optopt;
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char *optarg;
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char errmsg[64];
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int subopt;
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};
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enum optparse_argtype {
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OPTPARSE_NONE,
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OPTPARSE_REQUIRED,
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OPTPARSE_OPTIONAL
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};
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struct optparse_long {
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const char *longname;
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int shortname;
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enum optparse_argtype argtype;
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};
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/**
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* Initializes the parser state.
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*/
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OPTPARSE_API
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void optparse_init(struct optparse *options, char **argv);
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/**
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* Read the next option in the argv array.
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* @param optstring a getopt()-formatted option string.
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* @return the next option character, -1 for done, or '?' for error
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*
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* Just like getopt(), a character followed by no colons means no
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* argument. One colon means the option has a required argument. Two
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* colons means the option takes an optional argument.
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*/
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OPTPARSE_API
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int optparse(struct optparse *options, const char *optstring);
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/**
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* Handles GNU-style long options in addition to getopt() options.
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* This works a lot like GNU's getopt_long(). The last option in
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* longopts must be all zeros, marking the end of the array. The
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* longindex argument may be NULL.
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*/
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OPTPARSE_API
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int optparse_long(struct optparse *options,
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const struct optparse_long *longopts,
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int *longindex);
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/**
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* Used for stepping over non-option arguments.
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* @return the next non-option argument, or NULL for no more arguments
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*
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* Argument parsing can continue with optparse() after using this
|
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* function. That would be used to parse the options for the
|
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* subcommand returned by optparse_arg(). This function allows you to
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* ignore the value of optind.
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*/
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OPTPARSE_API
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char *optparse_arg(struct optparse *options);
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/* Implementation */
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#ifdef OPTPARSE_IMPLEMENTATION
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#define OPTPARSE_MSG_INVALID "invalid option"
|
||||
#define OPTPARSE_MSG_MISSING "option requires an argument"
|
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#define OPTPARSE_MSG_TOOMANY "option takes no arguments"
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static int
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optparse_error(struct optparse *options, const char *msg, const char *data)
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{
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unsigned p = 0;
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const char *sep = " -- '";
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while (*msg)
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options->errmsg[p++] = *msg++;
|
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while (*sep)
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options->errmsg[p++] = *sep++;
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while (p < sizeof(options->errmsg) - 2 && *data)
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options->errmsg[p++] = *data++;
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options->errmsg[p++] = '\'';
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options->errmsg[p++] = '\0';
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return '?';
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}
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OPTPARSE_API
|
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void
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optparse_init(struct optparse *options, char **argv)
|
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{
|
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options->argv = argv;
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options->permute = 1;
|
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options->optind = 1;
|
||||
options->subopt = 0;
|
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options->optarg = 0;
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options->errmsg[0] = '\0';
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}
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static int
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optparse_is_dashdash(const char *arg)
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{
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return arg != 0 && arg[0] == '-' && arg[1] == '-' && arg[2] == '\0';
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}
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|
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static int
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optparse_is_shortopt(const char *arg)
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||||
{
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||||
return arg != 0 && arg[0] == '-' && arg[1] != '-' && arg[1] != '\0';
|
||||
}
|
||||
|
||||
static int
|
||||
optparse_is_longopt(const char *arg)
|
||||
{
|
||||
return arg != 0 && arg[0] == '-' && arg[1] == '-' && arg[2] != '\0';
|
||||
}
|
||||
|
||||
static void
|
||||
optparse_permute(struct optparse *options, int index)
|
||||
{
|
||||
char *nonoption = options->argv[index];
|
||||
int i;
|
||||
for (i = index; i < options->optind - 1; i++)
|
||||
options->argv[i] = options->argv[i + 1];
|
||||
options->argv[options->optind - 1] = nonoption;
|
||||
}
|
||||
|
||||
static int
|
||||
optparse_argtype(const char *optstring, char c)
|
||||
{
|
||||
int count = OPTPARSE_NONE;
|
||||
if (c == ':')
|
||||
return -1;
|
||||
for (; *optstring && c != *optstring; optstring++);
|
||||
if (!*optstring)
|
||||
return -1;
|
||||
if (optstring[1] == ':')
|
||||
count += optstring[2] == ':' ? 2 : 1;
|
||||
return count;
|
||||
}
|
||||
|
||||
OPTPARSE_API
|
||||
int
|
||||
optparse(struct optparse *options, const char *optstring)
|
||||
{
|
||||
int type;
|
||||
char *next;
|
||||
char *option = options->argv[options->optind];
|
||||
options->errmsg[0] = '\0';
|
||||
options->optopt = 0;
|
||||
options->optarg = 0;
|
||||
if (option == 0) {
|
||||
return -1;
|
||||
} else if (optparse_is_dashdash(option)) {
|
||||
options->optind++; /* consume "--" */
|
||||
return -1;
|
||||
} else if (!optparse_is_shortopt(option)) {
|
||||
if (options->permute) {
|
||||
int index = options->optind++;
|
||||
int r = optparse(options, optstring);
|
||||
optparse_permute(options, index);
|
||||
options->optind--;
|
||||
return r;
|
||||
} else {
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
option += options->subopt + 1;
|
||||
options->optopt = option[0];
|
||||
type = optparse_argtype(optstring, option[0]);
|
||||
next = options->argv[options->optind + 1];
|
||||
switch (type) {
|
||||
case -1: {
|
||||
char str[2] = {0, 0};
|
||||
str[0] = option[0];
|
||||
options->optind++;
|
||||
return optparse_error(options, OPTPARSE_MSG_INVALID, str);
|
||||
}
|
||||
case OPTPARSE_NONE:
|
||||
if (option[1]) {
|
||||
options->subopt++;
|
||||
} else {
|
||||
options->subopt = 0;
|
||||
options->optind++;
|
||||
}
|
||||
return option[0];
|
||||
case OPTPARSE_REQUIRED:
|
||||
options->subopt = 0;
|
||||
options->optind++;
|
||||
if (option[1]) {
|
||||
options->optarg = option + 1;
|
||||
} else if (next != 0) {
|
||||
options->optarg = next;
|
||||
options->optind++;
|
||||
} else {
|
||||
char str[2] = {0, 0};
|
||||
str[0] = option[0];
|
||||
options->optarg = 0;
|
||||
return optparse_error(options, OPTPARSE_MSG_MISSING, str);
|
||||
}
|
||||
return option[0];
|
||||
case OPTPARSE_OPTIONAL:
|
||||
options->subopt = 0;
|
||||
options->optind++;
|
||||
if (option[1])
|
||||
options->optarg = option + 1;
|
||||
else
|
||||
options->optarg = 0;
|
||||
return option[0];
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
OPTPARSE_API
|
||||
char *
|
||||
optparse_arg(struct optparse *options)
|
||||
{
|
||||
char *option = options->argv[options->optind];
|
||||
options->subopt = 0;
|
||||
if (option != 0)
|
||||
options->optind++;
|
||||
return option;
|
||||
}
|
||||
|
||||
static int
|
||||
optparse_longopts_end(const struct optparse_long *longopts, int i)
|
||||
{
|
||||
return !longopts[i].longname && !longopts[i].shortname;
|
||||
}
|
||||
|
||||
static void
|
||||
optparse_from_long(const struct optparse_long *longopts, char *optstring)
|
||||
{
|
||||
char *p = optstring;
|
||||
int i;
|
||||
for (i = 0; !optparse_longopts_end(longopts, i); i++) {
|
||||
if (longopts[i].shortname) {
|
||||
int a;
|
||||
*p++ = longopts[i].shortname;
|
||||
for (a = 0; a < (int)longopts[i].argtype; a++)
|
||||
*p++ = ':';
|
||||
}
|
||||
}
|
||||
*p = '\0';
|
||||
}
|
||||
|
||||
/* Unlike strcmp(), handles options containing "=". */
|
||||
static int
|
||||
optparse_longopts_match(const char *longname, const char *option)
|
||||
{
|
||||
const char *a = option, *n = longname;
|
||||
if (longname == 0)
|
||||
return 0;
|
||||
for (; *a && *n && *a != '='; a++, n++)
|
||||
if (*a != *n)
|
||||
return 0;
|
||||
return *n == '\0' && (*a == '\0' || *a == '=');
|
||||
}
|
||||
|
||||
/* Return the part after "=", or NULL. */
|
||||
static char *
|
||||
optparse_longopts_arg(char *option)
|
||||
{
|
||||
for (; *option && *option != '='; option++);
|
||||
if (*option == '=')
|
||||
return option + 1;
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
optparse_long_fallback(struct optparse *options,
|
||||
const struct optparse_long *longopts,
|
||||
int *longindex)
|
||||
{
|
||||
int result;
|
||||
char optstring[96 * 3 + 1]; /* 96 ASCII printable characters */
|
||||
optparse_from_long(longopts, optstring);
|
||||
result = optparse(options, optstring);
|
||||
if (longindex != 0) {
|
||||
*longindex = -1;
|
||||
if (result != -1) {
|
||||
int i;
|
||||
for (i = 0; !optparse_longopts_end(longopts, i); i++)
|
||||
if (longopts[i].shortname == options->optopt)
|
||||
*longindex = i;
|
||||
}
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
OPTPARSE_API
|
||||
int
|
||||
optparse_long(struct optparse *options,
|
||||
const struct optparse_long *longopts,
|
||||
int *longindex)
|
||||
{
|
||||
int i;
|
||||
char *option = options->argv[options->optind];
|
||||
if (option == 0) {
|
||||
return -1;
|
||||
} else if (optparse_is_dashdash(option)) {
|
||||
options->optind++; /* consume "--" */
|
||||
return -1;
|
||||
} else if (optparse_is_shortopt(option)) {
|
||||
return optparse_long_fallback(options, longopts, longindex);
|
||||
} else if (!optparse_is_longopt(option)) {
|
||||
if (options->permute) {
|
||||
int index = options->optind++;
|
||||
int r = optparse_long(options, longopts, longindex);
|
||||
optparse_permute(options, index);
|
||||
options->optind--;
|
||||
return r;
|
||||
} else {
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
/* Parse as long option. */
|
||||
options->errmsg[0] = '\0';
|
||||
options->optopt = 0;
|
||||
options->optarg = 0;
|
||||
option += 2; /* skip "--" */
|
||||
options->optind++;
|
||||
for (i = 0; !optparse_longopts_end(longopts, i); i++) {
|
||||
const char *name = longopts[i].longname;
|
||||
if (optparse_longopts_match(name, option)) {
|
||||
char *arg;
|
||||
if (longindex)
|
||||
*longindex = i;
|
||||
options->optopt = longopts[i].shortname;
|
||||
arg = optparse_longopts_arg(option);
|
||||
if (longopts[i].argtype == OPTPARSE_NONE && arg != 0) {
|
||||
return optparse_error(options, OPTPARSE_MSG_TOOMANY, name);
|
||||
} if (arg != 0) {
|
||||
options->optarg = arg;
|
||||
} else if (longopts[i].argtype == OPTPARSE_REQUIRED) {
|
||||
options->optarg = options->argv[options->optind];
|
||||
if (options->optarg == 0)
|
||||
return optparse_error(options, OPTPARSE_MSG_MISSING, name);
|
||||
else
|
||||
options->optind++;
|
||||
}
|
||||
return options->optopt;
|
||||
}
|
||||
}
|
||||
return optparse_error(options, OPTPARSE_MSG_INVALID, option);
|
||||
}
|
||||
|
||||
#endif /* OPTPARSE_IMPLEMENTATION */
|
||||
#endif /* OPTPARSE_H */
|
||||
Reference in New Issue
Block a user