1 files changed, 501 insertions, 0 deletions

diff --git a/modules/httpd.cpp b/modules/httpd.cpp
new file mode 100644
index 000000000..adce45409
--- /dev/null
+++ b/modules/httpd.cpp
@@ -0,0 +1,501 @@
+/*
+ * Anope IRC Services
+ *
+ * Copyright (C) 2012-2017 Anope Team <team@anope.org>
+ *
+ * This file is part of Anope. Anope is free software; you can
+ * redistribute it and/or modify it under the terms of the GNU
+ * General Public License as published by the Free Software
+ * Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see see <http://www.gnu.org/licenses/>.
+ */
+
+#include "module.h"
+#include "modules/httpd.h"
+#include "modules/ssl.h"
+
+static Anope::string BuildDate()
+{
+	char timebuf[64];
+	struct tm *tm = localtime(&Anope::CurTime);
+	strftime(timebuf, sizeof(timebuf), "%a, %d %b %Y %H:%M:%S %Z", tm);
+	return timebuf;
+}
+
+static Anope::string GetStatusFromCode(HTTPError err)
+{
+	switch (err)
+	{
+		case HTTP_ERROR_OK:
+			return "200 OK";
+		case HTTP_CREATED:
+			return "201 Created";
+		case HTTP_FOUND:
+			return "302 Found";
+		case HTTP_BAD_REQUEST:
+			return "400 Bad Request";
+		case HTTP_PAGE_NOT_FOUND:
+			return "404 Not Found";
+		case HTTP_INTERNAL_SERVER_ERROR:
+			return "500 Internal Server Error";
+		case HTTP_NOT_SUPPORTED:
+			return "505 HTTP Version Not Supported";
+	}
+
+	return "501 Not Implemented";
+}
+
+class MyHTTPClient : public HTTPClient
+{
+	HTTPProvider *provider;
+	HTTPMessage message;
+	bool header_done, served;
+	Anope::string page_name;
+	Reference<HTTPPage> page;
+	Anope::string ip;
+
+	unsigned content_length;
+
+	void Serve()
+	{
+		if (this->served)
+			return;
+		this->served = true;
+
+		if (!this->page)
+		{
+			this->SendError(HTTP_PAGE_NOT_FOUND, "Page not found");
+			return;
+		}
+
+		if (this->ip == this->provider->ext_ip)
+		{
+			for (unsigned i = 0; i < this->provider->ext_headers.size(); ++i)
+			{
+				const Anope::string &token = this->provider->ext_headers[i];
+
+				if (this->message.headers.count(token))
+				{
+					this->ip = this->message.headers[token];
+					Anope::Logger.Category("httpd").Debug("IP for connection {0} changed to {1}", this->GetFD(), this->ip);
+					break;
+				}
+			}
+		}
+
+		Anope::Logger.Category("httpd").Debug("Serving page {0} to {1}", this->page_name, this->ip);
+
+		HTTPReply reply;
+		reply.content_type = this->page->GetContentType();
+
+		if (this->page->OnRequest(this->provider, this->page_name, this, this->message, reply))
+			this->SendReply(&reply);
+	}
+
+ public:
+	time_t created;
+
+	MyHTTPClient(HTTPProvider *l, int f, const sockaddrs &a) : Socket(f, l->IsIPv6()), HTTPClient(l, f, a), provider(l), header_done(false), served(false), ip(a.addr()), content_length(0), created(Anope::CurTime)
+	{
+		Anope::Logger.Category("httpd").Debug("Accepted connection {0} from {1}", f, a.addr());
+	}
+
+	~MyHTTPClient()
+	{
+		Anope::Logger.Category("httpd").Debug("Closing connection {0} from {1}", this->GetFD(), this->ip);
+	}
+
+	/* Close connection once all data is written */
+	bool ProcessWrite() override
+	{
+		return !BinarySocket::ProcessWrite() || this->write_buffer.empty() ? false : true;
+	}
+
+	const Anope::string GetIP() override
+	{
+		return this->ip;
+	}
+
+	bool Read(const char *buffer, size_t l) override
+	{
+		message.content.append(buffer, l);
+
+		for (size_t nl; !this->header_done && (nl = message.content.find('\n')) != Anope::string::npos;)
+		{
+			Anope::string token = message.content.substr(0, nl).trim();
+			message.content = message.content.substr(nl + 1);
+
+			if (token.empty())
+				this->header_done = true;
+			else
+				this->Read(token);
+		}
+
+		if (!this->header_done)
+			return true;
+
+		if (this->message.content.length() >= this->content_length)
+		{
+			sepstream sep(this->message.content, '&');
+			Anope::string token;
+
+			while (sep.GetToken(token))
+			{
+				size_t sz = token.find('=');
+				if (sz == Anope::string::npos || !sz || sz + 1 >= token.length())
+					continue;
+				this->message.post_data[token.substr(0, sz)] = HTTPUtils::URLDecode(token.substr(sz + 1));
+				Anope::Logger.Debug2("HTTP POST from {0}: {1}: {2}", this->clientaddr.addr(), token.substr(0, sz), this->message.post_data[token.substr(0, sz)]);
+			}
+
+			this->Serve();
+		}
+
+		return true;
+	}
+
+	bool Read(const Anope::string &buf)
+	{
+		Anope::Logger.Debug2("HTTP from {0}: {1}", this->clientaddr.addr(), buf);
+
+		if (message.method == httpd::Method::NONE)
+		{
+			std::vector<Anope::string> params;
+			spacesepstream(buf).GetTokens(params);
+
+			if (params.empty() || (params[0] != "GET" && params[0] != "POST" && params[0] != "PUT"
+				&& params[0] != "DELETE" && params[0] != "OPTIONS" && params[0] != "HEAD"))
+			{
+				this->SendError(HTTP_BAD_REQUEST, "Unknown operation");
+				return true;
+			}
+
+			if (params.size() != 3)
+			{
+				this->SendError(HTTP_BAD_REQUEST, "Invalid parameters");
+				return true;
+			}
+
+			if (params[0] == "GET")
+				message.method = httpd::Method::GET;
+			else if (params[0] == "POST")
+				message.method = httpd::Method::POST;
+			else if (params[0] == "PUT")
+				message.method = httpd::Method::PUT;
+			else if (params[0] == "DELETE")
+				message.method = httpd::Method::DELETE;
+			else if (params[0] == "OPTIONS")
+				message.method = httpd::Method::OPTIONS;
+			else if (params[0] == "HEAD")
+				message.method = httpd::Method::HEAD;
+
+			Anope::string targ = params[1];
+			size_t q = targ.find('?');
+			if (q != Anope::string::npos)
+			{
+				sepstream sep(targ.substr(q + 1), '&');
+				targ = targ.substr(0, q);
+
+				Anope::string token;
+				while (sep.GetToken(token))
+				{
+					size_t sz = token.find('=');
+					if (sz == Anope::string::npos || !sz || sz + 1 >= token.length())
+						continue;
+					this->message.get_data[token.substr(0, sz)] = HTTPUtils::URLDecode(token.substr(sz + 1));
+				}
+			}
+
+			this->page = this->provider->FindPage(targ);
+			this->page_name = targ;
+		}
+		else if (buf.find("Cookie: ") == 0)
+		{
+			spacesepstream sep(buf.substr(8));
+			Anope::string token;
+
+			while (sep.GetToken(token))
+			{
+				size_t sz = token.find('=');
+				if (sz == Anope::string::npos || !sz || sz + 1 >= token.length())
+					continue;
+				size_t end = token.length() - (sz + 1);
+				if (!sep.StreamEnd())
+					--end; // Remove trailing ;
+				this->message.cookies[token.substr(0, sz)] = token.substr(sz + 1, end);
+			}
+		}
+		else if (buf.find("Content-Length: ") == 0)
+		{
+			try
+			{
+				this->content_length = convertTo<unsigned>(buf.substr(16));
+			}
+			catch (const ConvertException &ex) { }
+		}
+		else if (buf.find(':') != Anope::string::npos)
+		{
+			size_t sz = buf.find(':');
+			if (sz + 2 < buf.length())
+				this->message.headers[buf.substr(0, sz)] = buf.substr(sz + 2);
+		}
+
+		return true;
+	}
+
+	void SendError(HTTPError err, const Anope::string &msg) override
+	{
+		HTTPReply h;
+
+		h.error = err;
+
+		h.Write(msg);
+
+		this->SendReply(&h);
+	}
+
+	void SendReply(HTTPReply *msg) override
+	{
+		this->WriteClient("HTTP/1.1 " + GetStatusFromCode(msg->error));
+		this->WriteClient("Date: " + BuildDate());
+		this->WriteClient("Server: Anope-" + Anope::VersionShort());
+		if (msg->content_type.empty())
+			this->WriteClient("Content-Type: text/html");
+		else
+			this->WriteClient("Content-Type: " + msg->content_type);
+		this->WriteClient("Content-Length: " + stringify(msg->length));
+
+		for (unsigned i = 0; i < msg->cookies.size(); ++i)
+		{
+			Anope::string buf = "Set-Cookie:";
+
+			for (HTTPReply::cookie::iterator it = msg->cookies[i].begin(), it_end = msg->cookies[i].end(); it != it_end; ++it)
+				buf += " " + it->first + "=" + it->second + ";";
+
+			buf.erase(buf.length() - 1);
+
+			this->WriteClient(buf);
+		}
+
+		typedef std::map<Anope::string, Anope::string> map;
+		for (map::iterator it = msg->headers.begin(), it_end = msg->headers.end(); it != it_end; ++it)
+			this->WriteClient(it->first + ": " + it->second);
+
+		this->WriteClient("Connection: Close");
+		this->WriteClient("");
+
+		for (unsigned i = 0; i < msg->out.size(); ++i)
+		{
+			HTTPReply::Data* d = msg->out[i];
+
+			this->Write(d->buf, d->len);
+
+			delete d;
+		}
+
+		msg->out.clear();
+	}
+};
+
+class MyHTTPProvider : public HTTPProvider, public Timer
+{
+	int timeout;
+	std::map<Anope::string, HTTPPage *> pages;
+	std::list<Reference<MyHTTPClient> > clients;
+
+ public:
+	MyHTTPProvider(Module *c, const Anope::string &n, const Anope::string &i, const unsigned short p, const int t, bool s) : Socket(-1, i.find(':') != Anope::string::npos), HTTPProvider(c, n, i, p, s), Timer(c, 10, Anope::CurTime, true), timeout(t) { }
+
+	void Tick(time_t) override
+	{
+		while (!this->clients.empty())
+		{
+			Reference<MyHTTPClient>& c = this->clients.front();
+			if (c && c->created + this->timeout >= Anope::CurTime)
+				break;
+
+			delete c;
+			this->clients.pop_front();
+		}
+	}
+
+	ClientSocket* OnAccept(int fd, const sockaddrs &addr) override
+	{
+		MyHTTPClient *c = new MyHTTPClient(this, fd, addr);
+		this->clients.push_back(c);
+		return c;
+	}
+
+	bool RegisterPage(HTTPPage *page) override
+	{
+		return this->pages.insert(std::make_pair(page->GetURL(), page)).second;
+	}
+
+	void UnregisterPage(HTTPPage *page) override
+	{
+		this->pages.erase(page->GetURL());
+	}
+
+	HTTPPage* FindPage(const Anope::string &pname) override
+	{
+		Anope::string resource = pname;
+
+		while (this->pages.count(resource) == 0)
+		{
+			size_t s = resource.find_last_of('/');
+
+			if (s == Anope::string::npos)
+				return nullptr;
+
+			resource = resource.substr(0, s);
+		}
+
+		return this->pages[resource];
+	}
+};
+
+class HTTPD : public Module
+	, public EventHook<Event::ModuleLoad>
+{
+	ServiceReference<SSLService> sslref;
+	std::map<Anope::string, MyHTTPProvider *> providers;
+ public:
+	HTTPD(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, EXTRA | VENDOR)
+		, EventHook<Event::ModuleLoad>(this)
+	{
+
+	}
+
+	~HTTPD()
+	{
+		for (std::map<int, Socket *>::const_iterator it = SocketEngine::Sockets.begin(), it_end = SocketEngine::Sockets.end(); it != it_end;)
+		{
+			Socket *s = it->second;
+			++it;
+
+			if (dynamic_cast<MyHTTPProvider *>(s) || dynamic_cast<MyHTTPClient *>(s))
+				delete s;
+		}
+
+		this->providers.clear();
+	}
+
+	void OnReload(Configuration::Conf *config) override
+	{
+		Configuration::Block *conf = config->GetModule(this);
+		std::set<Anope::string> existing;
+
+		for (int i = 0; i < conf->CountBlock("httpd"); ++i)
+		{
+			Configuration::Block *block = conf->GetBlock("httpd", i);
+
+
+			const Anope::string &hname = block->Get<Anope::string>("name", "httpd/main");
+			existing.insert(hname);
+
+			Anope::string ip = block->Get<Anope::string>("ip");
+			int port = block->Get<int>("port", "8080");
+			int timeout = block->Get<int>("timeout", "30");
+			bool ssl = block->Get<bool>("ssl", "no");
+			Anope::string ext_ip = block->Get<Anope::string>("extforward_ip");
+			Anope::string ext_header = block->Get<Anope::string>("extforward_header");
+
+			if (ip.empty())
+			{
+				logger.Log("You must configure a bind IP for HTTP server {0}", hname);
+				continue;
+			}
+			else if (port <= 0 || port > 65535)
+			{
+				logger.Log("You must configure a (valid) listen port for HTTP server {0}", hname);
+				continue;
+			}
+
+			MyHTTPProvider *p;
+			if (this->providers.count(hname) == 0)
+			{
+				try
+				{
+					p = new MyHTTPProvider(this, hname, ip, port, timeout, ssl);
+					if (ssl && sslref)
+						sslref->Init(p);
+				}
+				catch (const SocketException &ex)
+				{
+					logger.Log("Unable to create HTTP server {0}: {1}", hname, ex.GetReason());
+					continue;
+				}
+				this->providers[hname] = p;
+
+				logger.Log("Created HTTP server {0}", hname);
+			}
+			else
+			{
+				p = this->providers[hname];
+
+				if (p->GetIP() != ip || p->GetPort() != port)
+				{
+					delete p;
+					this->providers.erase(hname);
+
+					logger.Log("Changing HTTP server {0} to {1}:{2}", hname, ip, port);
+
+					try
+					{
+						p = new MyHTTPProvider(this, hname, ip, port, timeout, ssl);
+						if (ssl && sslref)
+							sslref->Init(p);
+					}
+					catch (const SocketException &ex)
+					{
+						logger.Log("Unable to create HTTP server {0}: {1}", hname, ex.GetReason());
+						continue;
+					}
+
+					this->providers[hname] = p;
+				}
+			}
+
+
+			p->ext_ip = ext_ip;
+			spacesepstream(ext_header).GetTokens(p->ext_headers);
+		}
+
+		for (std::map<Anope::string, MyHTTPProvider *>::iterator it = this->providers.begin(), it_end = this->providers.end(); it != it_end;)
+		{
+			HTTPProvider *p = it->second;
+			++it;
+
+			if (existing.count(p->GetName()) == 0)
+			{
+				logger.Log("Removing HTTP server {0}", p->GetName());
+				this->providers.erase(p->GetName());
+				delete p;
+			}
+		}
+	}
+
+	void OnModuleLoad(User *u, Module *m) override
+	{
+		for (std::map<Anope::string, MyHTTPProvider *>::iterator it = this->providers.begin(), it_end = this->providers.end(); it != it_end; ++it)
+		{
+			MyHTTPProvider *p = it->second;
+
+			if (p->IsSSL() && sslref)
+				try
+				{
+					sslref->Init(p);
+				}
+				catch (const CoreException &) { } // Throws on reinitialization
+		}
+	}
+};
+
+MODULE_INIT(HTTPD)