HTTPConvergenceLayer.cpp

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#include "Configuration.h"
#include "net/HTTPConvergenceLayer.h"
#include "core/BundleCore.h"
#include <memory>

namespace dtn
{
        namespace net
        {
                const int TIMEOUT = 1000;
                const int CONN_TIMEOUT = 5000;

                const int HTTP_OK = 200;
                const int HTTP_NO_DATA = 410;

                const int CURL_CONN_OK = 0;
                const int CURL_PARTIAL_FILE = 18;

                static size_t HTTPConvergenceLayer_callback_read(void *ptr, size_t size, size_t nmemb, void *s)
                {
                        size_t retcode = 0;
                        std::istream *stream = static_cast<std::istream*>(s);

                        if (stream->eof()) return 0;

                        char *buffer = static_cast<char*>(ptr);

                        stream->read(buffer, (size * nmemb));
                        retcode = stream->gcount();

                        return retcode;
                }

                static size_t HTTPConvergenceLayer_callback_write(void *ptr, size_t size, size_t nmemb, void *s)
                {
                        std::ostream *stream = static_cast<std::ostream*>(s);
                        char *buffer = static_cast<char*>(ptr);

                        if (!stream->good()) return 0;

                        stream->write(buffer, (size * nmemb));
                        stream->flush();

                        return (size * nmemb);
                }

                HTTPConvergenceLayer::HTTPConvergenceLayer(const std::string &server)
                 : _server(server), _push_iob(NULL), _running(true)
                {
                        curl_global_init(CURL_GLOBAL_ALL);
                }


                HTTPConvergenceLayer::~HTTPConvergenceLayer()
                {
                        curl_global_cleanup();
                }

                DownloadThread::DownloadThread(ibrcommon::iobuffer &buf)
                 : _stream(&buf)
                {
                }

                DownloadThread::~DownloadThread()
                {
                        join();
                }

                void DownloadThread::run() throw ()
                {
                        try  {
                                while(_stream.good())
                                {
                                        try  {
                                                dtn::data::Bundle bundle;
                                                dtn::data::DefaultDeserializer(_stream, dtn::core::BundleCore::getInstance()) >> bundle;

                                                // raise default bundle received event
                                                dtn::net::BundleReceivedEvent::raise(dtn::data::EID(), bundle, false);
                                        } catch (const ibrcommon::Exception &ex) {
                                                IBRCOMMON_LOGGER_DEBUG_TAG("HTTPConvergenceLayer", 10) << "http error: " << ex.what() << IBRCOMMON_LOGGER_ENDL;
                                        }

                                        yield();
                                }
                        } catch (const ibrcommon::ThreadException &e)  {
                                std::cerr << "error: " << e.what() << std::endl;
                        }
                }

                void DownloadThread::__cancellation() throw ()
                {
                }

                void HTTPConvergenceLayer::queue(const dtn::core::Node &node, const dtn::net::BundleTransfer &job)
                {
                        dtn::storage::BundleStorage &storage = dtn::core::BundleCore::getInstance().getStorage();
                        std::string url_send;

                        long http_code = 0;
                        //double upload_size = 0;

                        try {
                                // read the bundle out of the storage
                                const dtn::data::Bundle bundle = storage.get(job.getBundle());

                                ibrcommon::BLOB::Reference ref = ibrcommon::BLOB::create();
                                {
                                        ibrcommon::BLOB::iostream io = ref.iostream();
                                        dtn::data::DefaultSerializer(*io) << bundle;
                                }

                                ibrcommon::BLOB::iostream io = ref.iostream();
                                size_t length = io.size();
                                CURLcode res;
                                CURL *curl_up;

                                url_send = _server + "?eid=" + dtn::core::BundleCore::local.getString();
                                                                                 //+ "&dst-eid=dtn://experthe-laptop/filetransfer";
                                                                                 //+ "&priority=2";
                                                                                 //+ "&ttl=3600";

                                //if (job._bundle.source.getString() == (dtn::core::BundleCore::local.getString() + "/echo-client"))
                                //{
                                //      url_send = _server + "?eid=" + dtn::core::BundleCore::local.getString() + "&dst-eid=echo-client";
                                //}

                                curl_up = curl_easy_init();
                                if(curl_up)
                                {
                                        /* we want to use our own read function */
                                        curl_easy_setopt(curl_up, CURLOPT_READFUNCTION, HTTPConvergenceLayer_callback_read);

                                        /* enable uploading */
                                        curl_easy_setopt(curl_up, CURLOPT_UPLOAD, 1L);

                                        /* HTTP PUT please */
                                        curl_easy_setopt(curl_up, CURLOPT_PUT, 1L);

                                        /* disable connection timeout */
                                        curl_easy_setopt(curl_up, CURLOPT_CONNECTTIMEOUT, 0);

                                        /* specify target URL, and note that this URL should include a file
                                           name, not only a directory */
                                        curl_easy_setopt(curl_up, CURLOPT_URL, url_send.c_str());

                                        /* now specify which file to upload */
                                        curl_easy_setopt(curl_up, CURLOPT_READDATA, &(*io));

                                        /* provide the size of the upload, we specicially typecast the value
                                           to curl_off_t since we must be sure to use the correct data size */
                                        curl_easy_setopt(curl_up, CURLOPT_INFILESIZE_LARGE,
                                                                         (curl_off_t)length);

                                        /* Now run off and do what you've been told! */
                                        res = curl_easy_perform(curl_up);

                                        if(res == CURL_CONN_OK)
                                        {
                                                /* get HTTP Header StatusCode */
                                                curl_easy_getinfo (curl_up, CURLINFO_RESPONSE_CODE, &http_code);
                                                //curl_easy_getinfo (curl, CURLINFO_SIZE_UPLOAD, &upload_size);

                                                /* DEBUG OUTPUT INFORMATION */
                                                //std::cout << "CURL CODE    : " << res << std::endl;
                                                //std::cout << "HTTP CODE    : " << http_code << std::endl;
                                                //std::cout << "UPLOAD_SIZE: " << upload_size << " Bytes" << std::endl;
                                                /* DEBUG OUTPUT INFORMATION */

                                                if(http_code == HTTP_OK)
                                                {
                                                        dtn::net::BundleTransfer local_job = job;
                                                        local_job.complete();
                                                }
                                        }

                                        curl_easy_cleanup(curl_up);
                                }
                        } catch (const dtn::storage::NoBundleFoundException&) {
                                // send transfer aborted event
                                dtn::net::BundleTransfer local_job = job;
                                local_job.abort(dtn::net::TransferAbortedEvent::REASON_BUNDLE_DELETED);
                        }

                }

                dtn::core::Node::Protocol HTTPConvergenceLayer::getDiscoveryProtocol() const
                {
                        return dtn::core::Node::CONN_HTTP;
                }

                void HTTPConvergenceLayer::componentUp() throw ()
                {
                        // routine checked for throw() on 15.02.2013
                }

                void HTTPConvergenceLayer::componentRun() throw ()
                {

                        std::string url = _server + "?eid=" + dtn::core::BundleCore::local.getString();

                        CURL *curl_down;

                        while (_running)
                        {
                                curl_down = curl_easy_init();

                                while(curl_down)
                                {
                                        curl_easy_setopt(curl_down, CURLOPT_URL, url.c_str());

                                        /* disable connection timeout */
                                        curl_easy_setopt(curl_down, CURLOPT_CONNECTTIMEOUT, 0);

                                        /* no progress meter please */
                                        curl_easy_setopt(curl_down, CURLOPT_NOPROGRESS, 1L);

                                        /* cURL DEBUG options */
                                        //curl_easy_setopt(curl_down, CURLOPT_DEBUGFUNCTION, my_trace);
                                    //curl_easy_setopt(curl_down, CURLOPT_DEBUGDATA, &config);

                                    //curl_easy_setopt(curl_down, CURLOPT_DEBUGFUNCTION, my_trace);
                                        //curl_easy_setopt(curl_down, CURLOPT_VERBOSE, 1);

                                        // create a receiver thread
                                        {
                                                ibrcommon::MutexLock l(_push_iob_mutex);
                                                _push_iob = new ibrcommon::iobuffer();
                                        }

                                        std::auto_ptr<ibrcommon::iobuffer> auto_kill(_push_iob);
                                        std::ostream os(_push_iob);
                                        DownloadThread receiver(*_push_iob);

                                        /* send all data to this function  */
                                        curl_easy_setopt(curl_down, CURLOPT_WRITEFUNCTION, HTTPConvergenceLayer_callback_write);

                                        /* now specify where to write data */
                                        curl_easy_setopt(curl_down, CURLOPT_WRITEDATA, &os);

                                        /* do curl */
                                        receiver.start();
                                        curl_easy_perform(curl_down);

                                        {
                                                ibrcommon::MutexLock l(_push_iob_mutex);
                                                /* finalize iobuffer */
                                                _push_iob->finalize();
                                                receiver.join();
                                                _push_iob = NULL;
                                        }

                                        /* get HTTP Header StatusCode */
                                        //curl_easy_getinfo (curl_down, CURLINFO_RESPONSE_CODE, &http_code);
                                        //curl_easy_getinfo (curl, CURLINFO_SIZE_DOWNLOAD, &download_size);
                                        //curl_easy_getinfo (curl, CURLINFO_NUM_CONNECTS, &connects);

                                        /* Wait some time an retry to connect */
                                        sleep(CONN_TIMEOUT);  // Wenn Verbindung nicht hergestellt werden konnte warte 5 sec.
                                        IBRCOMMON_LOGGER_DEBUG_TAG("HTTPConvergenceLayer", 10) << "http error: " << "Couldn't connect to server ... wait " << CONN_TIMEOUT/1000 << "s until retry" << IBRCOMMON_LOGGER_ENDL;
                                }

                                /* always cleanup */
                                curl_easy_cleanup(curl_down);
                        }
                        yield();
                }

                void HTTPConvergenceLayer::componentDown() throw ()
                {
                }

                void HTTPConvergenceLayer::__cancellation() throw ()
                {
                        _running = false;

                        ibrcommon::MutexLock l(_push_iob_mutex);
                        if (_push_iob != NULL)
                        {
                                _push_iob->finalize();
                                _push_iob = NULL;
                        }
                }

                const std::string HTTPConvergenceLayer::getName() const
                {
                        return "HTTPConvergenceLayer";
                }
        }
}