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/*
* Copyright (c) 2020 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHout_ WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <hicn/transport/http/client_connection.h>
#include <fstream>
#include <map>
#include <experimental/algorithm>
#include <experimental/functional>
#define ASIO_STANDALONE
#include <asio.hpp>
#undef ASIO_STANDALONE
#include <thread>
typedef std::chrono::time_point<std::chrono::system_clock> Time;
typedef std::chrono::milliseconds TimeDuration;
Time t1;
#define DEFAULT_BETA 0.99
#define DEFAULT_GAMMA 0.07
namespace http {
typedef struct {
std::string file_name;
bool print_headers;
std::string producer_certificate;
std::string ipv6_first_word;
} Configuration;
class ReadBytesCallbackImplementation
: public transport::http::HTTPClientConnection::ReadBytesCallback {
static std::string chunk_separator;
public:
ReadBytesCallbackImplementation(std::string file_name, long yet_downloaded)
: file_name_(file_name),
temp_file_name_(file_name_ + ".temp"),
yet_downloaded_(yet_downloaded),
byte_downloaded_(yet_downloaded),
chunked_(false),
chunk_size_(0),
work_(std::make_unique<asio::io_service::work>(io_service_)),
thread_(
std::make_unique<std::thread>([this]() { io_service_.run(); })) {
std::streambuf *buf;
if (file_name_ != "-") {
of_.open(temp_file_name_, std::ofstream::binary | std::ofstream::app);
buf = of_.rdbuf();
} else {
buf = std::cout.rdbuf();
}
out_ = new std::ostream(buf);
}
~ReadBytesCallbackImplementation() {
if (thread_->joinable()) {
thread_->join();
}
}
void onBytesReceived(std::unique_ptr<utils::MemBuf> &&buffer) {
auto buffer_ptr = buffer.release();
io_service_.post([this, buffer_ptr]() {
auto buffer = std::unique_ptr<utils::MemBuf>(buffer_ptr);
std::unique_ptr<utils::MemBuf> payload;
if (!first_chunk_read_) {
transport::http::HTTPResponse http_response(std::move(buffer));
payload = http_response.getPayload();
auto header = http_response.getHeaders();
content_size_ = yet_downloaded_;
std::map<std::string, std::string>::iterator it =
header.find("Content-Length");
if (it != header.end()) {
content_size_ += std::stol(it->second);
} else {
it = header.find("Transfer-Encoding");
if (it != header.end() && it->second.compare("chunked") == 0) {
chunked_ = true;
}
}
first_chunk_read_ = true;
} else {
payload = std::move(buffer);
}
if (chunked_) {
if (chunk_size_ > 0) {
out_->write((char *)payload->data(), chunk_size_);
payload->trimStart(chunk_size_);
if (payload->length() >= chunk_separator.size()) {
payload->trimStart(chunk_separator.size());
}
}
while (payload->length() > 0) {
// read next chunk size
const char *begin = (const char *)payload->data();
const char *end = (const char *)payload->tail();
using std::experimental::make_boyer_moore_searcher;
auto it = std::experimental::search(
begin, end,
make_boyer_moore_searcher(chunk_separator.begin(),
chunk_separator.end()));
if (it != end) {
chunk_size_ = std::stoul(begin, 0, 16);
content_size_ += chunk_size_;
payload->trimStart(it + chunk_separator.size() - begin);
std::size_t to_write;
if (payload->length() >= chunk_size_) {
to_write = chunk_size_;
} else {
to_write = payload->length();
chunk_size_ -= payload->length();
}
out_->write((char *)payload->data(), to_write);
byte_downloaded_ += to_write;
payload->trimStart(to_write);
if (payload->length() >= chunk_separator.size()) {
payload->trimStart(chunk_separator.size());
}
}
}
} else {
out_->write((char *)payload->data(), payload->length());
byte_downloaded_ += payload->length();
}
if (file_name_ != "-") {
print_bar(byte_downloaded_, content_size_, false);
}
});
}
void onSuccess(std::size_t bytes) {
io_service_.post([this, bytes]() {
if (file_name_ != "-") {
of_.close();
delete out_;
std::size_t found = file_name_.find_last_of(".");
std::string name = file_name_.substr(0, found);
std::string extension = file_name_.substr(found + 1);
if (!exists_file(file_name_)) {
std::rename(temp_file_name_.c_str(), file_name_.c_str());
} else {
int i = 1;
std::ostringstream sstream;
sstream << name << "(" << i << ")." << extension;
std::string final_name = sstream.str();
while (exists_file(final_name)) {
i++;
sstream.str("");
sstream << name << "(" << i << ")." << extension;
final_name = sstream.str();
}
std::rename(temp_file_name_.c_str(), final_name.c_str());
}
print_bar(100, 100, true);
std::cout << "\nDownloaded " << bytes << " bytes" << std::endl;
}
work_.reset();
});
}
void onError(const std::error_code ec) {
io_service_.post([this]() {
of_.close();
delete out_;
work_.reset();
});
}
private:
bool exists_file(const std::string &name) {
std::ifstream f(name.c_str());
return f.good();
}
void print_bar(long value, long max_value, bool last) {
float progress = (float)value / max_value;
struct winsize size;
ioctl(STDOUT_FILENO, TIOCGWINSZ, &size);
int barWidth = size.ws_col - 8;
std::cout << "[";
int pos = barWidth * progress;
for (int i = 0; i < barWidth; ++i) {
if (i < pos) {
std::cout << "=";
} else if (i == pos) {
std::cout << ">";
} else {
std::cout << " ";
}
}
if (last) {
std::cout << "] " << int(progress * 100.0) << " %" << std::endl
<< std::endl;
} else {
std::cout << "] " << int(progress * 100.0) << " %\r";
std::cout.flush();
}
}
private:
std::string file_name_;
std::string temp_file_name_;
std::ostream *out_;
std::ofstream of_;
long yet_downloaded_;
long content_size_;
bool first_chunk_read_ = false;
long byte_downloaded_ = 0;
bool chunked_;
std::size_t chunk_size_;
asio::io_service io_service_;
std::unique_ptr<asio::io_service::work> work_;
std::unique_ptr<std::thread> thread_;
};
std::string ReadBytesCallbackImplementation::chunk_separator = "\r\n";
long checkFileStatus(std::string file_name) {
struct stat stat_buf;
std::string temp_file_name_ = file_name + ".temp";
int rc = stat(temp_file_name_.c_str(), &stat_buf);
return rc == 0 ? stat_buf.st_size : -1;
}
void usage(char *program_name) {
std::cerr << "usage:" << std::endl;
std::cerr << program_name << " [option]... [url]..." << std::endl;
std::cerr << program_name << "options:" << std::endl;
std::cerr
<< "-O <out_put_path> = write documents to <out_put_file>"
<< std::endl;
std::cerr << "-S = print server response"
<< std::endl;
std::cerr << "-P = first word of the ipv6 name of "
"the response"
<< std::endl;
std::cerr << "example:" << std::endl;
std::cerr << "\t" << program_name << " -O - http://origin/index.html"
<< std::endl;
exit(EXIT_FAILURE);
}
int main(int argc, char **argv) {
#ifdef _WIN32
WSADATA wsaData = {0};
WSAStartup(MAKEWORD(2, 2), &wsaData);
#endif
Configuration conf;
conf.file_name = "";
conf.print_headers = false;
conf.producer_certificate = "";
conf.ipv6_first_word = "b001";
std::string name("http://webserver/sintel/mpd");
int opt;
while ((opt = getopt(argc, argv, "O:Sc:P:")) != -1) {
switch (opt) {
case 'O':
conf.file_name = optarg;
break;
case 'S':
conf.print_headers = true;
break;
case 'c':
conf.producer_certificate = optarg;
break;
case 'P':
conf.ipv6_first_word = optarg;
break;
case 'h':
default:
usage(argv[0]);
break;
}
}
name = argv[optind];
std::cerr << "Using name " << name << " and name first word "
<< conf.ipv6_first_word << std::endl;
if (conf.file_name.empty()) {
conf.file_name = name.substr(1 + name.find_last_of("/"));
}
long yetDownloaded = checkFileStatus(conf.file_name);
std::map<std::string, std::string> headers;
if (yetDownloaded == -1) {
headers = {{"Host", "localhost"},
{"User-Agent", "higet/1.0"},
{"Connection", "Keep-Alive"}};
} else {
std::string range;
range.append("bytes=");
range.append(std::to_string(yetDownloaded));
range.append("-");
headers = {{"Host", "localhost"},
{"User-Agent", "higet/1.0"},
{"Connection", "Keep-Alive"},
{"Range", range}};
}
transport::http::HTTPClientConnection connection;
if (!conf.producer_certificate.empty()) {
connection.setCertificate(conf.producer_certificate);
}
t1 = std::chrono::system_clock::now();
http::ReadBytesCallbackImplementation readBytesCallback(conf.file_name,
yetDownloaded);
connection.get(name, headers, {}, nullptr, &readBytesCallback,
conf.ipv6_first_word);
#ifdef _WIN32
WSACleanup();
#endif
return EXIT_SUCCESS;
}
} // end namespace http
int main(int argc, char **argv) { return http::main(argc, argv); }
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