mirror of
https://github.com/monero-project/monero.git
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314 lines
12 KiB
C++
314 lines
12 KiB
C++
// Copyright (c) 2017-2018, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <string>
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#include <atomic>
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#include <boost/filesystem.hpp>
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#include <boost/asio.hpp>
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#include <boost/thread/thread.hpp>
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#include "cryptonote_config.h"
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#include "include_base_utils.h"
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#include "file_io_utils.h"
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#include "net/http_client.h"
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#include "download.h"
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#undef MONERO_DEFAULT_LOG_CATEGORY
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#define MONERO_DEFAULT_LOG_CATEGORY "net.dl"
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namespace tools
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{
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struct download_thread_control
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{
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const std::string path;
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const std::string uri;
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std::function<void(const std::string&, const std::string&, bool)> result_cb;
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std::function<bool(const std::string&, const std::string&, size_t, ssize_t)> progress_cb;
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bool stop;
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bool stopped;
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bool success;
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boost::thread thread;
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boost::mutex mutex;
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download_thread_control(const std::string &path, const std::string &uri, std::function<void(const std::string&, const std::string&, bool)> result_cb, std::function<bool(const std::string&, const std::string&, size_t, ssize_t)> progress_cb):
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path(path), uri(uri), result_cb(result_cb), progress_cb(progress_cb), stop(false), stopped(false), success(false) {}
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~download_thread_control() { if (thread.joinable()) thread.detach(); }
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};
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static void download_thread(download_async_handle control)
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{
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static std::atomic<unsigned int> thread_id(0);
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MLOG_SET_THREAD_NAME("DL" + std::to_string(thread_id++));
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struct stopped_setter
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{
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stopped_setter(const download_async_handle &control): control(control) {}
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~stopped_setter() { control->stopped = true; }
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download_async_handle control;
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} stopped_setter(control);
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try
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{
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boost::unique_lock<boost::mutex> lock(control->mutex);
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std::ios_base::openmode mode = std::ios_base::out | std::ios_base::binary;
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uint64_t existing_size = 0;
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if (epee::file_io_utils::get_file_size(control->path, existing_size) && existing_size > 0)
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{
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MINFO("Resuming downloading " << control->uri << " to " << control->path << " from " << existing_size);
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mode |= std::ios_base::app;
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}
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else
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{
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MINFO("Downloading " << control->uri << " to " << control->path);
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mode |= std::ios_base::trunc;
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}
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std::ofstream f;
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f.open(control->path, mode);
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if (!f.good()) {
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MERROR("Failed to open file " << control->path);
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control->result_cb(control->path, control->uri, control->success);
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return;
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}
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class download_client: public epee::net_utils::http::http_simple_client
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{
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public:
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download_client(download_async_handle control, std::ofstream &f, uint64_t offset = 0):
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control(control), f(f), content_length(-1), total(0), offset(offset) {}
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virtual ~download_client() { f.close(); }
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virtual bool on_header(const epee::net_utils::http::http_response_info &headers)
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{
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for (const auto &kv: headers.m_header_info.m_etc_fields)
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MDEBUG("Header: " << kv.first << ": " << kv.second);
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ssize_t length;
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if (epee::string_tools::get_xtype_from_string(length, headers.m_header_info.m_content_length) && length >= 0)
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{
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MINFO("Content-Length: " << length);
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content_length = length;
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boost::filesystem::path path(control->path);
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boost::filesystem::space_info si = boost::filesystem::space(path);
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if (si.available < (size_t)content_length)
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{
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const uint64_t avail = (si.available + 1023) / 1024, needed = (content_length + 1023) / 1024;
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MERROR("Not enough space to download " << needed << " kB to " << path << " (" << avail << " kB available)");
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return false;
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}
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}
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if (offset > 0)
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{
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// we requested a range, so check if we're getting it, otherwise truncate
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bool got_range = false;
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const std::string prefix = "bytes=" + std::to_string(offset) + "-";
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for (const auto &kv: headers.m_header_info.m_etc_fields)
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{
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if (kv.first == "Content-Range" && strncmp(kv.second.c_str(), prefix.c_str(), prefix.size()))
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{
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got_range = true;
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break;
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}
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}
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if (!got_range)
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{
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MWARNING("We did not get the requested range, downloading from start");
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f.close();
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f.open(control->path, std::ios_base::out | std::ios_base::binary | std::ios_base::trunc);
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}
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}
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return true;
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}
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virtual bool handle_target_data(std::string &piece_of_transfer)
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{
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try
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{
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boost::lock_guard<boost::mutex> lock(control->mutex);
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if (control->stop)
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return false;
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f << piece_of_transfer;
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total += piece_of_transfer.size();
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if (control->progress_cb && !control->progress_cb(control->path, control->uri, total, content_length))
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return false;
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return f.good();
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}
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catch (const std::exception &e)
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{
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MERROR("Error writing data: " << e.what());
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return false;
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}
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}
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private:
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download_async_handle control;
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std::ofstream &f;
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ssize_t content_length;
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size_t total;
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uint64_t offset;
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} client(control, f, existing_size);
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epee::net_utils::http::url_content u_c;
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if (!epee::net_utils::parse_url(control->uri, u_c))
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{
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MERROR("Failed to parse URL " << control->uri);
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control->result_cb(control->path, control->uri, control->success);
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return;
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}
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if (u_c.host.empty())
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{
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MERROR("Failed to determine address from URL " << control->uri);
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control->result_cb(control->path, control->uri, control->success);
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return;
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}
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lock.unlock();
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bool ssl = u_c.schema == "https";
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uint16_t port = u_c.port ? u_c.port : ssl ? 443 : 80;
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MDEBUG("Connecting to " << u_c.host << ":" << port);
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client.set_server(u_c.host, std::to_string(port), boost::none, ssl);
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if (!client.connect(std::chrono::seconds(30)))
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{
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boost::lock_guard<boost::mutex> lock(control->mutex);
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MERROR("Failed to connect to " << control->uri);
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control->result_cb(control->path, control->uri, control->success);
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return;
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}
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MDEBUG("GETting " << u_c.uri);
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const epee::net_utils::http::http_response_info *info = NULL;
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epee::net_utils::http::fields_list fields;
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if (existing_size > 0)
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{
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const std::string range = "bytes=" + std::to_string(existing_size) + "-";
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MDEBUG("Asking for range: " << range);
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fields.push_back(std::make_pair("Range", range));
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}
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if (!client.invoke_get(u_c.uri, std::chrono::seconds(30), "", &info, fields))
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{
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boost::lock_guard<boost::mutex> lock(control->mutex);
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MERROR("Failed to connect to " << control->uri);
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client.disconnect();
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control->result_cb(control->path, control->uri, control->success);
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return;
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}
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if (control->stop)
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{
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boost::lock_guard<boost::mutex> lock(control->mutex);
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MDEBUG("Download cancelled");
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client.disconnect();
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control->result_cb(control->path, control->uri, control->success);
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return;
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}
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if (!info)
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{
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boost::lock_guard<boost::mutex> lock(control->mutex);
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MERROR("Failed invoking GET command to " << control->uri << ", no status info returned");
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client.disconnect();
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control->result_cb(control->path, control->uri, control->success);
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return;
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}
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MDEBUG("response code: " << info->m_response_code);
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MDEBUG("response length: " << info->m_header_info.m_content_length);
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MDEBUG("response comment: " << info->m_response_comment);
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MDEBUG("response body: " << info->m_body);
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for (const auto &f: info->m_additional_fields)
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MDEBUG("additional field: " << f.first << ": " << f.second);
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if (info->m_response_code != 200 && info->m_response_code != 206)
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{
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boost::lock_guard<boost::mutex> lock(control->mutex);
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MERROR("Status code " << info->m_response_code);
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client.disconnect();
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control->result_cb(control->path, control->uri, control->success);
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return;
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}
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client.disconnect();
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f.close();
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MDEBUG("Download complete");
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lock.lock();
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control->success = true;
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control->result_cb(control->path, control->uri, control->success);
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return;
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}
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catch (const std::exception &e)
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{
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MERROR("Exception in download thread: " << e.what());
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// fall through and call result_cb not from the catch block to avoid another exception
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}
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boost::lock_guard<boost::mutex> lock(control->mutex);
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control->result_cb(control->path, control->uri, control->success);
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}
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bool download(const std::string &path, const std::string &url, std::function<bool(const std::string&, const std::string&, size_t, ssize_t)> cb)
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{
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bool success = false;
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download_async_handle handle = download_async(path, url, [&success](const std::string&, const std::string&, bool result) {success = result;}, cb);
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download_wait(handle);
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return success;
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}
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download_async_handle download_async(const std::string &path, const std::string &url, std::function<void(const std::string&, const std::string&, bool)> result, std::function<bool(const std::string&, const std::string&, size_t, ssize_t)> progress)
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{
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download_async_handle control = std::make_shared<download_thread_control>(path, url, result, progress);
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control->thread = boost::thread([control](){ download_thread(control); });
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return control;
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}
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bool download_finished(const download_async_handle &control)
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{
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CHECK_AND_ASSERT_MES(control != 0, false, "NULL async download handle");
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boost::lock_guard<boost::mutex> lock(control->mutex);
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return control->stopped;
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}
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bool download_error(const download_async_handle &control)
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{
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CHECK_AND_ASSERT_MES(control != 0, false, "NULL async download handle");
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boost::lock_guard<boost::mutex> lock(control->mutex);
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return !control->success;
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}
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bool download_wait(const download_async_handle &control)
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{
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CHECK_AND_ASSERT_MES(control != 0, false, "NULL async download handle");
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{
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boost::lock_guard<boost::mutex> lock(control->mutex);
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if (control->stopped)
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return true;
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}
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control->thread.join();
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return true;
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}
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bool download_cancel(const download_async_handle &control)
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{
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CHECK_AND_ASSERT_MES(control != 0, false, "NULL async download handle");
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{
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boost::lock_guard<boost::mutex> lock(control->mutex);
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if (control->stopped)
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return true;
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control->stop = true;
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}
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control->thread.join();
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return true;
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}
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}
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