mirror of https://github.com/PurpleI2P/i2pd.git
I2P: End-to-End encrypted and anonymous Internet
https://i2pd.website/
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631 lines
19 KiB
631 lines
19 KiB
#include <string.h> |
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#include <inttypes.h> |
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#include <string> |
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#include <map> |
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#include <fstream> |
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#include <chrono> |
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#include <condition_variable> |
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#include <boost/lexical_cast.hpp> |
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#include "Base.h" |
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#include "util.h" |
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#include "Identity.h" |
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#include "FS.h" |
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#include "Log.h" |
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#include "NetDb.h" |
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#include "ClientContext.h" |
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#include "AddressBook.h" |
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|
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namespace i2p |
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{ |
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namespace client |
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{ |
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// TODO: this is actually proxy class |
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class AddressBookFilesystemStorage: public AddressBookStorage |
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{ |
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private: |
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i2p::fs::HashedStorage storage; |
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std::string etagsPath, indexPath; |
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|
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public: |
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AddressBookFilesystemStorage (): storage("addressbook", "b", "", "b32") {}; |
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std::shared_ptr<const i2p::data::IdentityEx> GetAddress (const i2p::data::IdentHash& ident) const; |
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void AddAddress (std::shared_ptr<const i2p::data::IdentityEx> address); |
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void RemoveAddress (const i2p::data::IdentHash& ident); |
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|
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bool Init (); |
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int Load (std::map<std::string, i2p::data::IdentHash>& addresses); |
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int Save (const std::map<std::string, i2p::data::IdentHash>& addresses); |
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void SaveEtag (const i2p::data::IdentHash& subsciption, const std::string& etag, const std::string& lastModified); |
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bool GetEtag (const i2p::data::IdentHash& subscription, std::string& etag, std::string& lastModified); |
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|
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}; |
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bool AddressBookFilesystemStorage::Init() |
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{ |
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storage.SetPlace(i2p::fs::GetDataDir()); |
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// init ETags |
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etagsPath = storage.GetRoot() + i2p::fs::dirSep + "etags"; |
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if (!i2p::fs::Exists (etagsPath)) |
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i2p::fs::CreateDirectory (etagsPath); |
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// init storage |
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indexPath = storage.GetRoot() + i2p::fs::dirSep + "addresses.csv"; |
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return storage.Init(i2p::data::GetBase32SubstitutionTable(), 32); |
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} |
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std::shared_ptr<const i2p::data::IdentityEx> AddressBookFilesystemStorage::GetAddress (const i2p::data::IdentHash& ident) const |
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{ |
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std::string filename = storage.Path(ident.ToBase32()); |
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std::ifstream f(filename, std::ifstream::binary); |
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if (!f.is_open ()) { |
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LogPrint(eLogDebug, "Addressbook: Requested, but not found: ", filename); |
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return nullptr; |
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} |
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|
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f.seekg (0,std::ios::end); |
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size_t len = f.tellg (); |
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if (len < i2p::data::DEFAULT_IDENTITY_SIZE) { |
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LogPrint (eLogError, "Addressbook: File ", filename, " is too short: ", len); |
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return nullptr; |
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} |
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f.seekg(0, std::ios::beg); |
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uint8_t * buf = new uint8_t[len]; |
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f.read((char *)buf, len); |
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auto address = std::make_shared<i2p::data::IdentityEx>(buf, len); |
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delete[] buf; |
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return address; |
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} |
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void AddressBookFilesystemStorage::AddAddress (std::shared_ptr<const i2p::data::IdentityEx> address) |
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{ |
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std::string path = storage.Path( address->GetIdentHash().ToBase32() ); |
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std::ofstream f (path, std::ofstream::binary | std::ofstream::out); |
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if (!f.is_open ()) { |
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LogPrint (eLogError, "Addressbook: can't open file ", path); |
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return; |
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} |
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size_t len = address->GetFullLen (); |
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uint8_t * buf = new uint8_t[len]; |
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address->ToBuffer (buf, len); |
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f.write ((char *)buf, len); |
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delete[] buf; |
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} |
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void AddressBookFilesystemStorage::RemoveAddress (const i2p::data::IdentHash& ident) |
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{ |
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storage.Remove( ident.ToBase32() ); |
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} |
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int AddressBookFilesystemStorage::Load (std::map<std::string, i2p::data::IdentHash>& addresses) |
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{ |
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int num = 0; |
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std::string s; |
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std::ifstream f (indexPath, std::ifstream::in); // in text mode |
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if (f.is_open ()) { |
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LogPrint(eLogInfo, "Addressbook: using index file ", indexPath); |
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} else { |
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LogPrint(eLogWarning, "Addressbook: Can't open ", indexPath); |
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return 0; |
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} |
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addresses.clear (); |
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while (!f.eof ()) { |
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getline(f, s); |
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if (!s.length()) |
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continue; // skip empty line |
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std::size_t pos = s.find(','); |
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if (pos != std::string::npos) |
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{ |
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std::string name = s.substr(0, pos++); |
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std::string addr = s.substr(pos); |
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i2p::data::IdentHash ident; |
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ident.FromBase32 (addr); |
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addresses[name] = ident; |
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num++; |
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} |
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} |
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LogPrint (eLogInfo, "Addressbook: ", num, " addresses loaded from storage"); |
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return num; |
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} |
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int AddressBookFilesystemStorage::Save (const std::map<std::string, i2p::data::IdentHash>& addresses) |
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{ |
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if (addresses.size() == 0) { |
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LogPrint(eLogWarning, "Addressbook: not saving empty addressbook"); |
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return 0; |
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} |
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int num = 0; |
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std::ofstream f (indexPath, std::ofstream::out); // in text mode |
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if (!f.is_open ()) { |
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LogPrint (eLogWarning, "Addressbook: Can't open ", indexPath); |
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return 0; |
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} |
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for (auto it: addresses) { |
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f << it.first << "," << it.second.ToBase32 () << std::endl; |
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num++; |
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} |
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LogPrint (eLogInfo, "Addressbook: ", num, " addresses saved"); |
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return num; |
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} |
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void AddressBookFilesystemStorage::SaveEtag (const i2p::data::IdentHash& subscription, const std::string& etag, const std::string& lastModified) |
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{ |
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std::string fname = etagsPath + i2p::fs::dirSep + subscription.ToBase32 () + ".txt"; |
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std::ofstream f (fname, std::ofstream::out | std::ofstream::trunc); |
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if (f) |
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{ |
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f << etag << std::endl; |
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f<< lastModified << std::endl; |
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} |
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} |
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bool AddressBookFilesystemStorage::GetEtag (const i2p::data::IdentHash& subscription, std::string& etag, std::string& lastModified) |
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{ |
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std::string fname = etagsPath + i2p::fs::dirSep + subscription.ToBase32 () + ".txt"; |
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std::ifstream f (fname, std::ofstream::in); |
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if (!f || f.eof ()) return false; |
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std::getline (f, etag); |
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if (f.eof ()) return false; |
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std::getline (f, lastModified); |
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return true; |
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} |
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//--------------------------------------------------------------------- |
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AddressBook::AddressBook (): m_Storage(new AddressBookFilesystemStorage), m_IsLoaded (false), m_IsDownloading (false), |
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m_DefaultSubscription (nullptr), m_SubscriptionsUpdateTimer (nullptr) |
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{ |
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} |
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AddressBook::~AddressBook () |
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{ |
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Stop (); |
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} |
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void AddressBook::Start () |
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{ |
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m_Storage->Init(); |
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LoadHosts (); /* try storage, then hosts.txt, then download */ |
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StartSubscriptions (); |
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} |
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void AddressBook::Stop () |
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{ |
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StopSubscriptions (); |
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if (m_SubscriptionsUpdateTimer) |
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{ |
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delete m_SubscriptionsUpdateTimer; |
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m_SubscriptionsUpdateTimer = nullptr; |
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} |
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if (m_IsDownloading) |
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{ |
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LogPrint (eLogInfo, "Addressbook: subscriptions is downloading, abort"); |
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for (int i = 0; i < 30; i++) |
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{ |
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if (!m_IsDownloading) |
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{ |
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LogPrint (eLogInfo, "Addressbook: subscriptions download complete"); |
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break; |
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} |
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std::this_thread::sleep_for (std::chrono::seconds (1)); // wait for 1 seconds |
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} |
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LogPrint (eLogError, "Addressbook: subscription download timeout"); |
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m_IsDownloading = false; |
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} |
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if (m_Storage) |
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{ |
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m_Storage->Save (m_Addresses); |
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delete m_Storage; |
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m_Storage = nullptr; |
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} |
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m_DefaultSubscription = nullptr; |
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for (auto it: m_Subscriptions) |
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delete it; |
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m_Subscriptions.clear (); |
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} |
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bool AddressBook::GetIdentHash (const std::string& address, i2p::data::IdentHash& ident) |
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{ |
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auto pos = address.find(".b32.i2p"); |
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if (pos != std::string::npos) |
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{ |
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Base32ToByteStream (address.c_str(), pos, ident, 32); |
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return true; |
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} |
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else |
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{ |
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pos = address.find (".i2p"); |
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if (pos != std::string::npos) |
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{ |
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auto identHash = FindAddress (address); |
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if (identHash) |
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{ |
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ident = *identHash; |
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return true; |
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} |
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else |
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return false; |
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} |
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} |
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// if not .b32 we assume full base64 address |
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i2p::data::IdentityEx dest; |
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if (!dest.FromBase64 (address)) |
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return false; |
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ident = dest.GetIdentHash (); |
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return true; |
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} |
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const i2p::data::IdentHash * AddressBook::FindAddress (const std::string& address) |
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{ |
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auto it = m_Addresses.find (address); |
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if (it != m_Addresses.end ()) |
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return &it->second; |
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return nullptr; |
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} |
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void AddressBook::InsertAddress (const std::string& address, const std::string& base64) |
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{ |
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auto ident = std::make_shared<i2p::data::IdentityEx>(); |
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ident->FromBase64 (base64); |
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m_Storage->AddAddress (ident); |
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m_Addresses[address] = ident->GetIdentHash (); |
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LogPrint (eLogInfo, "Addressbook: added ", address," -> ", ToAddress(ident->GetIdentHash ())); |
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} |
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void AddressBook::InsertAddress (std::shared_ptr<const i2p::data::IdentityEx> address) |
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{ |
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m_Storage->AddAddress (address); |
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} |
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std::shared_ptr<const i2p::data::IdentityEx> AddressBook::GetAddress (const std::string& address) |
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{ |
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i2p::data::IdentHash ident; |
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if (!GetIdentHash (address, ident)) return nullptr; |
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return m_Storage->GetAddress (ident); |
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} |
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void AddressBook::LoadHosts () |
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{ |
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if (m_Storage->Load (m_Addresses) > 0) |
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{ |
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m_IsLoaded = true; |
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return; |
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} |
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// then try hosts.txt |
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std::ifstream f (i2p::fs::DataDirPath("hosts.txt"), std::ifstream::in); // in text mode |
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if (f.is_open ()) |
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{ |
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LoadHostsFromStream (f); |
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m_IsLoaded = true; |
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} |
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} |
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void AddressBook::LoadHostsFromStream (std::istream& f) |
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{ |
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std::unique_lock<std::mutex> l(m_AddressBookMutex); |
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int numAddresses = 0; |
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std::string s; |
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while (!f.eof ()) |
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{ |
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getline(f, s); |
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if (!s.length()) |
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continue; // skip empty line |
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size_t pos = s.find('='); |
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if (pos != std::string::npos) |
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{ |
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std::string name = s.substr(0, pos++); |
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std::string addr = s.substr(pos); |
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auto ident = std::make_shared<i2p::data::IdentityEx> (); |
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if (ident->FromBase64(addr)) |
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{ |
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m_Addresses[name] = ident->GetIdentHash (); |
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m_Storage->AddAddress (ident); |
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numAddresses++; |
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} |
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else |
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LogPrint (eLogError, "Addressbook: malformed address ", addr, " for ", name); |
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} |
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} |
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LogPrint (eLogInfo, "Addressbook: ", numAddresses, " addresses processed"); |
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if (numAddresses > 0) |
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{ |
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m_IsLoaded = true; |
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m_Storage->Save (m_Addresses); |
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} |
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} |
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void AddressBook::LoadSubscriptions () |
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{ |
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if (!m_Subscriptions.size ()) |
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{ |
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std::ifstream f (i2p::fs::DataDirPath ("subscriptions.txt"), std::ifstream::in); // in text mode |
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if (f.is_open ()) |
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{ |
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std::string s; |
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while (!f.eof ()) |
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{ |
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getline(f, s); |
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if (!s.length()) continue; // skip empty line |
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m_Subscriptions.push_back (new AddressBookSubscription (*this, s)); |
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} |
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LogPrint (eLogInfo, "Addressbook: ", m_Subscriptions.size (), " subscriptions urls loaded"); |
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} |
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else |
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LogPrint (eLogWarning, "Addressbook: subscriptions.txt not found in datadir"); |
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} |
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else |
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LogPrint (eLogError, "Addressbook: subscriptions already loaded"); |
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} |
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bool AddressBook::GetEtag (const i2p::data::IdentHash& subscription, std::string& etag, std::string& lastModified) |
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{ |
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if (m_Storage) |
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return m_Storage->GetEtag (subscription, etag, lastModified); |
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else |
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return false; |
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} |
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void AddressBook::DownloadComplete (bool success, const i2p::data::IdentHash& subscription, const std::string& etag, const std::string& lastModified) |
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{ |
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m_IsDownloading = false; |
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int nextUpdateTimeout = CONTINIOUS_SUBSCRIPTION_RETRY_TIMEOUT; |
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if (success) |
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{ |
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if (m_DefaultSubscription) m_DefaultSubscription.reset (nullptr); |
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if (m_IsLoaded) |
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nextUpdateTimeout = CONTINIOUS_SUBSCRIPTION_UPDATE_TIMEOUT; |
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else |
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m_IsLoaded = true; |
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if (m_Storage) m_Storage->SaveEtag (subscription, etag, lastModified); |
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} |
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if (m_SubscriptionsUpdateTimer) |
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{ |
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m_SubscriptionsUpdateTimer->expires_from_now (boost::posix_time::minutes(nextUpdateTimeout)); |
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m_SubscriptionsUpdateTimer->async_wait (std::bind (&AddressBook::HandleSubscriptionsUpdateTimer, |
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this, std::placeholders::_1)); |
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} |
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} |
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void AddressBook::StartSubscriptions () |
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{ |
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LoadSubscriptions (); |
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if (m_IsLoaded && m_Subscriptions.empty ()) return; |
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auto dest = i2p::client::context.GetSharedLocalDestination (); |
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if (dest) |
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{ |
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m_SubscriptionsUpdateTimer = new boost::asio::deadline_timer (dest->GetService ()); |
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m_SubscriptionsUpdateTimer->expires_from_now (boost::posix_time::minutes(INITIAL_SUBSCRIPTION_UPDATE_TIMEOUT)); |
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m_SubscriptionsUpdateTimer->async_wait (std::bind (&AddressBook::HandleSubscriptionsUpdateTimer, |
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this, std::placeholders::_1)); |
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} |
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else |
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LogPrint (eLogError, "Addressbook: can't start subscriptions: missing shared local destination"); |
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} |
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void AddressBook::StopSubscriptions () |
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{ |
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if (m_SubscriptionsUpdateTimer) |
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m_SubscriptionsUpdateTimer->cancel (); |
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} |
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|
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void AddressBook::HandleSubscriptionsUpdateTimer (const boost::system::error_code& ecode) |
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{ |
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if (ecode != boost::asio::error::operation_aborted) |
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{ |
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auto dest = i2p::client::context.GetSharedLocalDestination (); |
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if (!dest) { |
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LogPrint(eLogWarning, "Addressbook: missing local destination, skip subscription update"); |
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return; |
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} |
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if (!m_IsDownloading && dest->IsReady ()) |
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{ |
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if (!m_IsLoaded) |
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{ |
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// download it from http://i2p-projekt.i2p/hosts.txt |
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LogPrint (eLogInfo, "Addressbook: trying to download it from default subscription."); |
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if (!m_DefaultSubscription) |
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m_DefaultSubscription.reset (new AddressBookSubscription (*this, DEFAULT_SUBSCRIPTION_ADDRESS)); |
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m_IsDownloading = true; |
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m_DefaultSubscription->CheckSubscription (); |
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} |
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else if (!m_Subscriptions.empty ()) |
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{ |
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// pick random subscription |
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auto ind = rand () % m_Subscriptions.size(); |
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m_IsDownloading = true; |
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m_Subscriptions[ind]->CheckSubscription (); |
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} |
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} |
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else |
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{ |
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// try it again later |
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m_SubscriptionsUpdateTimer->expires_from_now (boost::posix_time::minutes(INITIAL_SUBSCRIPTION_RETRY_TIMEOUT)); |
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m_SubscriptionsUpdateTimer->async_wait (std::bind (&AddressBook::HandleSubscriptionsUpdateTimer, |
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this, std::placeholders::_1)); |
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} |
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} |
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} |
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AddressBookSubscription::AddressBookSubscription (AddressBook& book, const std::string& link): |
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m_Book (book), m_Link (link) |
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{ |
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} |
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void AddressBookSubscription::CheckSubscription () |
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{ |
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std::thread load_hosts(&AddressBookSubscription::Request, this); |
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load_hosts.detach(); // TODO: use join |
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} |
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|
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void AddressBookSubscription::Request () |
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{ |
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// must be run in separate thread |
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LogPrint (eLogInfo, "Addressbook: Downloading hosts database from ", m_Link, " ETag: ", m_Etag, " Last-Modified: ", m_LastModified); |
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bool success = false; |
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i2p::util::http::url u (m_Link); |
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i2p::data::IdentHash ident; |
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if (m_Book.GetIdentHash (u.host_, ident)) |
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{ |
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if (!m_Etag.length ()) |
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{ |
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// load ETag |
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m_Book.GetEtag (ident, m_Etag, m_LastModified); |
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LogPrint (eLogInfo, "Addressbook: set ", m_Link, " ETag: ", m_Etag, " Last-Modified: ", m_LastModified); |
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} |
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std::condition_variable newDataReceived; |
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std::mutex newDataReceivedMutex; |
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auto leaseSet = i2p::client::context.GetSharedLocalDestination ()->FindLeaseSet (ident); |
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if (!leaseSet) |
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{ |
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std::unique_lock<std::mutex> l(newDataReceivedMutex); |
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i2p::client::context.GetSharedLocalDestination ()->RequestDestination (ident, |
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[&newDataReceived, &leaseSet](std::shared_ptr<i2p::data::LeaseSet> ls) |
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{ |
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leaseSet = ls; |
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newDataReceived.notify_all (); |
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}); |
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if (newDataReceived.wait_for (l, std::chrono::seconds (SUBSCRIPTION_REQUEST_TIMEOUT)) == std::cv_status::timeout) |
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{ |
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LogPrint (eLogError, "Addressbook: Subscription LeaseSet request timeout expired"); |
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i2p::client::context.GetSharedLocalDestination ()->CancelDestinationRequest (ident); |
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} |
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} |
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if (leaseSet) |
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{ |
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std::stringstream request, response; |
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// standard header |
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request << "GET " << u.path_ << " HTTP/1.1\r\n" |
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<< "Host: " << u.host_ << "\r\n" |
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<< "Accept: */*\r\n" |
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<< "User-Agent: Wget/1.11.4\r\n" |
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//<< "Accept-Encoding: gzip\r\n" |
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<< "X-Accept-Encoding: x-i2p-gzip;q=1.0, identity;q=0.5, deflate;q=0, gzip;q=0, *;q=0\r\n" |
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<< "Connection: close\r\n"; |
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if (m_Etag.length () > 0) // etag |
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request << i2p::util::http::IF_NONE_MATCH << ": " << m_Etag << "\r\n"; |
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if (m_LastModified.length () > 0) // if-modfief-since |
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request << i2p::util::http::IF_MODIFIED_SINCE << ": " << m_LastModified << "\r\n"; |
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request << "\r\n"; // end of header |
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auto stream = i2p::client::context.GetSharedLocalDestination ()->CreateStream (leaseSet, u.port_); |
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stream->Send ((uint8_t *)request.str ().c_str (), request.str ().length ()); |
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|
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uint8_t buf[4096]; |
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bool end = false; |
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while (!end) |
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{ |
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stream->AsyncReceive (boost::asio::buffer (buf, 4096), |
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[&](const boost::system::error_code& ecode, std::size_t bytes_transferred) |
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{ |
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if (bytes_transferred) |
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response.write ((char *)buf, bytes_transferred); |
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if (ecode == boost::asio::error::timed_out || !stream->IsOpen ()) |
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end = true; |
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newDataReceived.notify_all (); |
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}, |
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30); // wait for 30 seconds |
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std::unique_lock<std::mutex> l(newDataReceivedMutex); |
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if (newDataReceived.wait_for (l, std::chrono::seconds (SUBSCRIPTION_REQUEST_TIMEOUT)) == std::cv_status::timeout) |
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LogPrint (eLogError, "Addressbook: subscriptions request timeout expired"); |
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} |
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// process remaining buffer |
|
while (size_t len = stream->ReadSome (buf, 4096)) |
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response.write ((char *)buf, len); |
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|
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// parse response |
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std::string version; |
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response >> version; // HTTP version |
|
int status = 0; |
|
response >> status; // status |
|
if (status == 200) // OK |
|
{ |
|
bool isChunked = false, isGzip = false; |
|
std::string header, statusMessage; |
|
std::getline (response, statusMessage); |
|
// read until new line meaning end of header |
|
while (!response.eof () && header != "\r") |
|
{ |
|
std::getline (response, header); |
|
auto colon = header.find (':'); |
|
if (colon != std::string::npos) |
|
{ |
|
std::string field = header.substr (0, colon); |
|
boost::to_lower (field); // field are not case-sensitive |
|
colon++; |
|
header.resize (header.length () - 1); // delete \r |
|
if (field == i2p::util::http::ETAG) |
|
m_Etag = header.substr (colon + 1); |
|
else if (field == i2p::util::http::LAST_MODIFIED) |
|
m_LastModified = header.substr (colon + 1); |
|
else if (field == i2p::util::http::TRANSFER_ENCODING) |
|
isChunked = !header.compare (colon + 1, std::string::npos, "chunked"); |
|
else if (field == i2p::util::http::CONTENT_ENCODING) |
|
isGzip = !header.compare (colon + 1, std::string::npos, "gzip") || |
|
!header.compare (colon + 1, std::string::npos, "x-i2p-gzip"); |
|
} |
|
} |
|
LogPrint (eLogInfo, "Addressbook: received ", m_Link, " ETag: ", m_Etag, " Last-Modified: ", m_LastModified); |
|
if (!response.eof ()) |
|
{ |
|
success = true; |
|
if (!isChunked) |
|
success = ProcessResponse (response, isGzip); |
|
else |
|
{ |
|
// merge chunks |
|
std::stringstream merged; |
|
i2p::util::http::MergeChunkedResponse (response, merged); |
|
success = ProcessResponse (merged, isGzip); |
|
} |
|
} |
|
} |
|
else if (status == 304) |
|
{ |
|
success = true; |
|
LogPrint (eLogInfo, "Addressbook: no updates from ", m_Link); |
|
} |
|
else |
|
LogPrint (eLogWarning, "Adressbook: HTTP response ", status); |
|
} |
|
else |
|
LogPrint (eLogError, "Addressbook: address ", u.host_, " not found"); |
|
} |
|
else |
|
LogPrint (eLogError, "Addressbook: Can't resolve ", u.host_); |
|
|
|
if (!success) |
|
LogPrint (eLogError, "Addressbook: download hosts.txt from ", m_Link, " failed"); |
|
|
|
m_Book.DownloadComplete (success, ident, m_Etag, m_LastModified); |
|
} |
|
|
|
bool AddressBookSubscription::ProcessResponse (std::stringstream& s, bool isGzip) |
|
{ |
|
if (isGzip) |
|
{ |
|
std::stringstream uncompressed; |
|
i2p::data::GzipInflator inflator; |
|
inflator.Inflate (s, uncompressed); |
|
if (!uncompressed.fail ()) |
|
m_Book.LoadHostsFromStream (uncompressed); |
|
else |
|
return false; |
|
} |
|
else |
|
m_Book.LoadHostsFromStream (s); |
|
return true; |
|
} |
|
} |
|
} |
|
|
|
|