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root/proj/trunk/Search/HttpHandler.cpp

Comparing trunk/Search/HttpHandler.cpp (file contents):
Revision 1 by douglas, 2002-12-04T20:22:59-08:00 vs.
Revision 209 by douglas, 2003-07-18T00:26:41-07:00

#	Line 1 | Line 1
1		/* ============================================================================
2		* Douglas Thrift's Search Engine License
3		*
4	<	* Copyright (C) 2002, Douglas Thrift. All Rights Reserved.
4	>	* Copyright (C) 2002-2003, Douglas Thrift. All Rights Reserved.
5		* Redistribution and use in source and binary forms, with or without
6		* modification, are permitted provided that the following conditions are met:
7		*
#	Line 46 | Line 46
46		//
47		// Douglas Thrift
48		//
49	<	// HttpHandler.cpp
49	>	// $Id: HttpHandler.cpp,v 1.21 2003/07/18 07:26:41 douglas Exp $
50
51		#include "HttpHandler.h"
52
53	<	#ifdef _WIN32
54	<	#define PATH_SEPARATOR "\\"
55	<	#define ENV_SEPARATOR ';'
56	<	#else
57	<	#define PATH_SEPARATOR "/"
58	<	#define ENV_SEPARATOR ':'
53	>	// Lovely C Sockets!
54	>	#ifndef _WIN32
55	>	// BSD Sockets
56	>	#include <unistd.h>
57	>	#include <sys/types.h>
58	>	#include <sys/socket.h>
59	>	#include <netinet/in.h>
60	>	#include <netdb.h>
61	>
62	>	#define INVALID_SOCKET -1
63	>	#define SOCKET_ERROR -1
64	>
65	>	inline int closesocket(SOCKET s) { return close(s); }
66		#endif
67
68		HttpHandler::HttpHandler()
69		{
70	<	string arguments = "(Ljava/lang/String;ILjava/lang/String;Ljava/lang/Strin"
64	<	+ string("g;Ljava/lang/String;)Ljava/lang/String;");
65	<
66	<	begin = 0;
70	>	buffer = new char[BUFSIZ + 1];
71
72	<	setJarPath();
72	>	#ifdef _WIN32
73	>	if (WSAStartup(MAKEWORD(2, 0), &data) != 0)
74	>	{
75	>	error(program + ": WSAStartup");
76	>	exit(1);
77	>	}
78	>	#endif // _WIN32
79
80	<	//      options[0].optionString = jarPath;
81	<	//      memset(&vm_args, 0, sizeof (vm_args));
82	<	//      vm_args.version = JNI_VERSION_1_4;
83	<	//      vm_args.nOptions = 1;
84	<	//      vm_args.options = options;
85	<
76	<	//      status = JNI_CreateJavaVM(&jvm, (void**)&env, &vm_args);
77	<
78	<	//      if (status != JNI_ERR)
79	<	//      {
80	<	//              cls = env->FindClass("HttpConnector");
81	<
82	<	//              if (cls != 0)
83	<	//              {
84	<	//                      mid = env->GetStaticMethodID(cls, "connect", arguments.c_str());
85	<	//              }
86	<	//      }
80	>	binary = false;
81	>	length = 0;
82	>	chunked = false;
83	>	#ifdef _OpenSSL_
84	>	tls = false;
85	>	#endif
86		}
87
88		HttpHandler::~HttpHandler()
89		{
90	<	//      if (status != JNI_ERR)
92	<	//      {
93	<	//              jvm->DestroyJavaVM();
94	<	//      }
90	>	delete [] buffer;
91
92	<	//      delete [] jarPath;
92	>	#ifdef _WIN32
93	>	WSACleanup();
94	>	#endif // _WIN32
95		}
96
97	<	bool HttpHandler::connect(URL& url)
97	>	bool HttpHandler::handle(URL &url, const string referer, bool head)
98		{
99		bool answer = false;
100
101	<	//      if (status != JNI_ERR)
102	<	//      {
103	<	//              if (cls != 0)
104	<	//              {
105	<	//                      if (mid != 0)
106	<	//                      {
107	<	//                              jstring addressJ = env->NewStringUTF(url.getAddress().c_str());
108	<	//                              jint portJ = url.getPort();
111	<	//                              jstring pathJ = env->NewStringUTF(url.getPath().c_str());
112	<	//                              jstring programNameJ = env->NewStringUTF(programName.c_str());
113	<	//                              jstring programVersionJ =
114	<	//                                      env->NewStringUTF(programVersion.c_str());
115	<
116	<	//                              jstring pageJ = (jstring)env->CallStaticObjectMethod(cls, mid,
117	<	//                                      addressJ, portJ, pathJ, programNameJ, programVersionJ);
118	<
119	<	//                              const char* pageC = env->GetStringUTFChars(pageJ, 0);
120	<	//                              page = pageC;
121	<	//                              env->ReleaseStringUTFChars(pageJ, pageC);
122	<
123	<	//                              if (page != "unknown host\n" && page != "io exception\n" &&
124	<	//                                      page != "bad headers\n") answer = true;
125	<	//                      }
126	<	//              }
127	<	//      }
101	>	if ((http = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
102	>	{
103	>	error(program + ": Socket");
104	>	exit(1);
105	>	}
106	>
107	>	sockaddr_in address;
108	>	hostent* host;
109
110	<	return answer;
130	<	}
110	>	address.sin_family = AF_INET;
111
112	<	HttpHandler& HttpHandler::getline(string& line, char endline)
113	<	{
114	<	int end = page.find(endline, begin);
115	<	int newline = page.find('\n', begin);
112	>	if ((host = gethostbyname(url.getAddress().c_str())) == NULL)
113	>	{
114	>	error(program + ": Host: " + url.getAddress(), true);
115	>	return answer;
116	>	}
117
118	<	if (newline < end || end == string::npos)
118	>	address.sin_addr = *((in_addr*)*host->h_addr_list);
119	>	address.sin_port = htons(url.getPort());
120	>
121	>	if (connect(http, (sockaddr*)&address, sizeof(sockaddr_in)) ==
122	>	SOCKET_ERROR)
123		{
124	<	end = newline;
124	>	error(program + ": Connect");
125	>	return answer;
126		}
127
128	<	line = page.substr(begin, end - begin);
128	>	#ifdef _OpenSSL_
129	>	if (url.getTls())
130	>	{
131	>	tls = true;
132	>
133	>	if (!starttls()) return answer;
134	>	}
135	>	#endif
136
137	<	if (end == string::npos)
137	>	if (head)
138		{
139	<	begin = end;
139	>	putline("HEAD " + url.getPath() + " HTTP/1.1");
140		}
141		else
142		{
143	<	begin = end + 1;
143	>	putline("GET " + url.getPath() + " HTTP/1.1");
144		}
145
146	<	return *this;
147	<	}
146	>	putline("Accept: text/html; text/plain");
147	>	#ifndef _OpenSSL_
148	>	putline("User-Agent: " + agent(true) + ' ' + platform());
149
150	<	bool HttpHandler::good()
151	<	{
152	<	bool answer = true;
150	>	if (url.getPort() == 80)
151	>	#else
152	>	putline("User-Agent: " + agent(true) + ' ' + platform() + ' '
153	>	+ openssl(true));
154
155	<	if (begin >= page.length())
155	>	if (url.getPort() == 80 && tls || url.getPort() == 443 && tls)
156	>	#endif
157	>	{
158	>	putline("Host: " + url.getAddress());
159	>	}
160	>	else
161		{
162	<	answer = false;
162	>	ostringstream port;
163	>
164	>	port << url.getPort();
165	>
166	>	putline("Host: " + url.getAddress() + ':' + port.str());
167		}
168	<	else if (begin == string::npos)
168	>
169	>	if (referer != "")
170		{
171	<	answer = false;
171	>	putline("Referer: " + referer);
172		}
173
174	+	putline("Connection: close");
175	+	putline();
176	+
177	+	code response;
178	+	string line;
179	+
180	+	do
181	+	{
182	+	line = getline();
183	+
184	+	if (line.find("HTTP/") != 0)
185	+	{
186	+	return answer;
187	+	}
188	+
189	+	unsigned dot = line.find('.');
190	+	unsigned space = line.find(' ');
191	+
192	+	unsigned major = strtoul(line.substr(5, dot - 5).c_str(), 0, 10);
193	+	unsigned minor = strtoul(line.substr(dot + 1, space - dot - 1).c_str(),
194	+	0, 10);
195	+
196	+	if (major > 1)
197	+	{
198	+	cerr << program << ": Potentially Incompatible Server: HTTP/" <<
199	+	major << "." << minor << "\n";
200	+
201	+	return answer;
202	+	}
203	+
204	+	response = code(strtoul(line.substr(space + 1).c_str(), 0, 10));
205	+
206	+	if (response < ok) do line = getline(); while (line != "");
207	+	}
208	+	while (response < ok);
209	+
210	+	do
211	+	{
212	+	line = getline();
213	+
214	+	if (line != "")
215	+	{
216	+	unsigned colon = line.find(':');
217	+
218	+	string field = line.substr(0, colon);
219	+	string value = line.substr(colon + 1);
220	+
221	+	while (isspace(value[0])) value.erase(0, 1);
222	+
223	+	if (field == "Content-Type")
224	+	{
225	+	type = value;
226	+	}
227	+	else if (field == "Content-Length")
228	+	{
229	+	length = strtoul(value.c_str(), 0, 10);
230	+	}
231	+	else if (field == "Location")
232	+	{
233	+	location = value;
234	+	}
235	+	else if (field == "Transfer-Encoding")
236	+	{
237	+	chunked = value == "chunked";
238	+	}
239	+	}
240	+	}
241	+	while (line != "");
242	+
243	+	switch (response)
244	+	{
245	+	case ok:
246	+	if (debug) cerr << "response = " << response << "\n";
247	+	answer = true;
248	+	break;
249	+	case choices:
250	+	case moved:
251	+	case found:
252	+	if (debug) cerr << "response = " << response << "\n"
253	+	<< "location = " << location << "\n";
254	+	location = getLink(location, url);
255	+	break;
256	+	case notfound:
257	+	case internal:
258	+	if (debug) cerr << "response = " << response << "\n";
259	+	break;
260	+	default:
261	+	if (debug) cerr << "response = " << response << "\n";
262	+	if (response <= 299)
263	+	{
264	+	answer = true;
265	+	}
266	+	else if (response <= 399)
267	+	{
268	+	location = getLink(location, url);
269	+	}
270	+	break;
271	+	}
272	+
273	+	if (!head && answer) populate();
274	+
275		return answer;
276		}
277
278		void HttpHandler::clear()
279		{
280	<	begin = 0;
281	<	page = "";
280	>	if (tls)
281	>	{
282	>	SSL_shutdown(ssl);
283	>	SSL_free(ssl);
284	>	SSL_CTX_free(ctx);
285	>	}
286	>
287	>	closesocket(http);
288	>
289	>	type = "";
290	>	length = 0;
291	>	location = "";
292	>	page.clear();
293	>	page.str("");
294	>	chunked = false;
295	>	#ifdef _OpenSSL_
296	>	tls = false;
297	>	#endif
298		}
299
300	<	void HttpHandler::setJarPath()
300	>	void HttpHandler::populate()
301		{
302	<	const string jarFile = "HttpConnector.jar";
181	<	string jarFilePath = jarFile;
182	<
183	<	ifstream fin(jarFilePath.c_str());
184	<	if (!fin.is_open())
302	>	if (!chunked)
303		{
304	<	unsigned end = program.rfind(PATH_SEPARATOR);
305	<	if (end != string::npos)
304	>	unsigned left = length;
305	>
306	>	while (left > 0)
307		{
308	<	string path = program.substr(0, end);
308	>	memset(buffer, 0, BUFSIZ + 1);
309
310	<	jarFilePath = path + PATH_SEPARATOR + jarFile;
310	>	unsigned bytes = left > BUFSIZ ? BUFSIZ : left;
311	>	long received;
312
313	<	fin.open(jarFilePath.c_str());
194	<	if (!fin.is_open())
313	>	while (true)
314		{
315	<	cerr << program << ": Could not find required file: "
316	<	<< jarFile << "\n";
317	<	exit(1);
318	<	}
319	<	else
320	<	{
321	<	fin.close();
315	>	#ifndef _OpenSSL_
316	>	if ((received = recv(http, buffer, bytes, 0)) == SOCKET_ERROR)
317	>	{
318	>	error(program + ": Recv");
319	>	exit(1);
320	>	}
321	>	#else
322	>	if ((received = !tls ? recv(http, buffer, bytes, 0) :
323	>	SSL_read(ssl, buffer, bytes)) <= 0)
324	>	{
325	>	!tls ? error(program + ": Recv") : error(program +
326	>	": SSL Read", int(received));
327	>	}
328	>	#endif
329	>	else if (received != bytes)
330	>	{
331	>	left -= received;
332	>	page << buffer;
333	>
334	>	memset(buffer, 0, BUFSIZ + 1);
335	>
336	>	bytes -= received;
337	>	}
338	>	else
339	>	{
340	>	break;
341	>	}
342		}
343	+
344	+	page << buffer;
345	+	left -= bytes;
346		}
347	<	else
347	>	}
348	>	else
349	>	{
350	>	unsigned chunk;
351	>
352	>	do
353		{
354	<	string envPath = getenv("PATH");
354	>	chunk = strtoul(getline().c_str(), 0, 16);
355
356	<	if (debug) cerr << "envPath = " << envPath << "\n";
356	>	unsigned left = chunk;
357
358	<	unsigned begin = 0;
212	<	do
358	>	while (left > 0)
359		{
360	<	unsigned end = envPath.find(ENV_SEPARATOR, begin);
215	<	string path = envPath.substr(begin, end);
216	<
217	<	if (debug) cerr << "path = " << path << "\n";
360	>	memset(buffer, 0, BUFSIZ + 1);
361
362	<	jarFilePath = path + PATH_SEPARATOR + jarFile;
362	>	unsigned bytes = left > BUFSIZ ? BUFSIZ : left;
363	>	long received;
364
365	<	fin.open(jarFilePath.c_str());
222	<	if (fin.is_open())
365	>	while (true)
366		{
367	<	fin.close();
368	<	break;
367	>	#ifndef _OpenSSL_
368	>	if ((received = recv(http, buffer, bytes, 0)) ==
369	>	SOCKET_ERROR)
370	>	{
371	>	error(program + ": Recv");
372	>	exit(1);
373	>	}
374	>	#else
375	>	if ((received = !tls ? recv(http, buffer, bytes, 0) :
376	>	SSL_read(ssl, buffer, bytes)) <= 0)
377	>	{
378	>	!tls ? error(program + ": Recv") : error(program +
379	>	": SSL Read", int(received));
380	>	exit(1);
381	>	}
382	>	#endif
383	>	else if (received != bytes)
384	>	{
385	>	left -= received;
386	>	page << buffer;
387	>
388	>	memset(buffer, 0, BUFSIZ + 1);
389	>
390	>	bytes -= received;
391	>	}
392	>	else
393	>	{
394	>	break;
395	>	}
396		}
397
398	<	begin = end != string::npos ? end + 1 : string::npos;
398	>	page << buffer;
399	>	left -= bytes;
400		}
230	–	while (begin < envPath.length());
401
402	<	if (begin == string::npos)
402	>	getline();
403	>	length += chunk;
404	>	}
405	>	while (chunk > 0);
406	>	}
407	>
408	>	if (!binary)
409	>	{
410	>	string page = this->page.str();
411	>
412	>	for (unsigned index = 0; index < page.length(); index++)
413	>	{
414	>	if (page[index] == '\r' && (index + 1 < page.length()) ? page[index +
415	>	1] == '\n' : false)
416	>	{
417	>	page.erase(index, 1);
418	>	}
419	>	else if (page[index] == '\r')
420		{
421	<	cerr << program << ": Could not find required file: "
235	<	<< jarFile << "\n";
236	<	exit(1);
421	>	page[index] = '\n';
422		}
423		}
424	+
425	+	this->page.str(page);
426	+	}
427	+	}
428	+
429	+	void HttpHandler::putline(const string line)
430	+	{
431	+	sprintf(buffer, "%s\r\n", line.c_str());
432	+
433	+	#ifndef _OpenSSL_
434	+	if (send(http, buffer, strlen(buffer), 0) == SOCKET_ERROR)
435	+	{
436	+	error(program + ": Send");
437	+	exit(1);
438	+	}
439	+	#else
440	+	if (!tls)
441	+	{
442	+	if (send(http, buffer, strlen(buffer), 0) == SOCKET_ERROR)
443	+	{
444	+	error(program + ": Send");
445	+	exit(1);
446	+	}
447		}
448		else
449		{
450	<	fin.close();
450	>	int number;
451	>
452	>	if ((number = SSL_write(ssl, buffer, strlen(buffer))) <= 0)
453	>	{
454	>	error(program + ": SSL Write", number);
455	>	exit(1);
456	>	}
457		}
458	+	#endif
459	+	}
460
461	<	string jarPath = "-Djava.class.path=" + jarFilePath;
461	>	string HttpHandler::getline()
462	>	{
463	>	string line;
464	>	char byte;
465	>
466	>	do
467	>	{
468	>	#ifndef _OpenSSL_
469	>	if (recv(http, &byte, 1, 0) == SOCKET_ERROR)
470	>	{
471	>	error(program + ": Recv");
472	>	}
473	>	#else
474	>	if (!tls)
475	>	{
476	>	if (recv(http, &byte, 1, 0) == SOCKET_ERROR)
477	>	{
478	>	error(program + ": Recv");
479	>	}
480	>	}
481	>	else
482	>	{
483	>	int number;
484
485	<	//      this->jarPath = new char[jarPath.length()];
486	<	//      strcpy(this->jarPath, jarPath.c_str());
485	>	if ((number = SSL_read(ssl, &byte, 1)) <= 0)
486	>	{
487	>	error(program + ": SSL Read", number);
488	>	}
489	>	}
490	>	#endif
491	>
492	>	if (byte != '\r' && byte != '\n')
493	>	{
494	>	line += byte;
495	>	}
496	>	}
497	>	while (byte != '\n');
498	>
499	>	return line;
500		}
501	+
502	+	void HttpHandler::error(const string& prefix, bool host)
503	+	{
504	+	#ifdef _WIN32
505	+	string error;
506	+
507	+	switch (WSAGetLastError())
508	+	{
509	+	case WSAEACCES:
510	+	error = "Permission denied";
511	+	break;
512	+	case WSAEADDRINUSE:
513	+	error = "Address already in use";
514	+	break;
515	+	case WSAEADDRNOTAVAIL:
516	+	error = "Cannot assign requested address";
517	+	break;
518	+	case WSAEAFNOSUPPORT:
519	+	error = "Address family not supported by protocol family";
520	+	break;
521	+	case WSAEALREADY:
522	+	error = "Operation already in progress";
523	+	break;
524	+	case WSAECONNABORTED:
525	+	error = "Software caused connection abort";
526	+	break;
527	+	case WSAECONNREFUSED:
528	+	error = "Connection refused";
529	+	break;
530	+	case WSAECONNRESET:
531	+	error = "Connection reset by peer";
532	+	break;
533	+	case WSAEDESTADDRREQ:
534	+	error = "Destination address required";
535	+	break;
536	+	case WSAEFAULT:
537	+	error = "Bad address";
538	+	break;
539	+	case WSAEHOSTDOWN:
540	+	error = "Host is down";
541	+	break;
542	+	case WSAEHOSTUNREACH:
543	+	error = "No route to host";
544	+	break;
545	+	case WSAEINPROGRESS:
546	+	error = "Operation now in progress";
547	+	break;
548	+	case WSAEINTR:
549	+	error = "Interrupted function call";
550	+	break;
551	+	case WSAEINVAL:
552	+	error = "Invalid argument";
553	+	break;
554	+	case WSAEISCONN:
555	+	error = "Socket is already connected";
556	+	break;
557	+	case WSAEMFILE:
558	+	error = "Too many open files";
559	+	break;
560	+	case WSAEMSGSIZE:
561	+	error = "Message too long";
562	+	break;
563	+	case WSAENETDOWN:
564	+	error = "Network is down";
565	+	break;
566	+	case WSAENETRESET:
567	+	error = "Network dropped connection on reset";
568	+	break;
569	+	case WSAENETUNREACH:
570	+	error = "Network is unreachable";
571	+	break;
572	+	case WSAENOBUFS:
573	+	error = "No buffer space available";
574	+	break;
575	+	case WSAENOPROTOOPT:
576	+	error = "Bad protocol option";
577	+	break;
578	+	case WSAENOTCONN:
579	+	error = "Socket is not connected";
580	+	break;
581	+	case WSAENOTSOCK:
582	+	error = "Socket operation on non-socket";
583	+	break;
584	+	case WSAEOPNOTSUPP:
585	+	error = "Operation not supported";
586	+	break;
587	+	case WSAEPFNOSUPPORT:
588	+	error = "Protocol family not supported";
589	+	break;
590	+	case WSAEPROCLIM:
591	+	error = "Too many processes";
592	+	break;
593	+	case WSAEPROTONOSUPPORT:
594	+	error = "Protocol not supported";
595	+	break;
596	+	case WSAEPROTOTYPE:
597	+	error = "Protocol wrong type for socket";
598	+	break;
599	+	case WSAESHUTDOWN:
600	+	error = "Cannot send after socket shutdown";
601	+	break;
602	+	case WSAESOCKTNOSUPPORT:
603	+	error = "Socket type not supported";
604	+	break;
605	+	case WSAETIMEDOUT:
606	+	error = "Connection timed out";
607	+	break;
608	+	case WSATYPE_NOT_FOUND:
609	+	error = "Class type not found";
610	+	break;
611	+	case WSAEWOULDBLOCK:
612	+	error = "Resource temporarily unavailable";
613	+	break;
614	+	case WSAHOST_NOT_FOUND:
615	+	error = "Host not found";
616	+	break;
617	+	case WSA_INVALID_HANDLE:
618	+	error = "Specified event object handle is invalid";
619	+	break;
620	+	case WSA_INVALID_PARAMETER:
621	+	error = "One or more parameters are invalid";
622	+	break;
623	+	//      case WSAINVALIDPROCTABLE:
624	+	//              error = "Invalid procedure table from service provider";
625	+	//              break;
626	+	//      case WSAINVALIDPROVIDER:
627	+	//              error = "Invalid service provider version number";
628	+	//              break;
629	+	case WSA_IO_INCOMPLETE:
630	+	error = "Overlapped I/O event object not in signaled state";
631	+	break;
632	+	case WSA_IO_PENDING:
633	+	error = "Overlapped operations will complete later";
634	+	break;
635	+	case WSA_NOT_ENOUGH_MEMORY:
636	+	error = "Insufficient memory available";
637	+	break;
638	+	case WSANOTINITIALISED:
639	+	error = "Successful WSAStartup not yet performed";
640	+	break;
641	+	case WSANO_DATA:
642	+	error = "Valid name, no data record of requested type";
643	+	break;
644	+	case WSANO_RECOVERY:
645	+	error = "This is a non-recoverable error";
646	+	break;
647	+	//      case WSAPROVIDERFAILEDINIT:
648	+	//              error = "Unable to initialize a service provider";
649	+	//              break;
650	+	case WSASYSCALLFAILURE:
651	+	error = "System call failure";
652	+	break;
653	+	case WSASYSNOTREADY:
654	+	error = "Network subsystem is unavailable";
655	+	break;
656	+	case WSATRY_AGAIN:
657	+	error = "Non-authoritative host not found";
658	+	break;
659	+	case WSAVERNOTSUPPORTED:
660	+	error = "WINSOCK.DLL version out of range";
661	+	break;
662	+	case WSAEDISCON:
663	+	error = "Graceful shutdown in progress";
664	+	break;
665	+	case WSA_OPERATION_ABORTED:
666	+	error = "Overlapped operation aborted";
667	+	break;
668	+	default:
669	+	error = "Unknown error";
670	+	break;
671	+	}
672	+
673	+	cerr << prefix << ": " << error << "\n";
674	+	#else
675	+	if (host)
676	+	{
677	+	string error;
678	+
679	+	switch (h_errno)
680	+	{
681	+	case HOST_NOT_FOUND:
682	+	error = "Unknown host";
683	+	break;
684	+	case TRY_AGAIN:
685	+	error = "Host name lookup failure";
686	+	break;
687	+	case NO_RECOVERY:
688	+	error = "Unknown server error";
689	+	break;
690	+	case NO_DATA:
691	+	error = "No address associated with name";
692	+	break;
693	+	default:
694	+	error = "Unknown error";
695	+	break;
696	+	}
697	+
698	+	cerr << prefix << ": " << error << "\n";
699	+	}
700	+	else
701	+	{
702	+	perror(prefix.c_str());
703	+	}
704	+	#endif // _WIN32
705	+	}
706	+
707	+	#ifdef _OpenSSL_
708	+	void HttpHandler::error(const string& prefix, int number)
709	+	{
710	+	string error;
711	+
712	+	switch (SSL_get_error(ssl, number))
713	+	{
714	+	case SSL_ERROR_NONE:
715	+	error = "The TLS/SSL I/O operation completed";
716	+	break;
717	+	case SSL_ERROR_ZERO_RETURN:
718	+	error = "The TLS/SSL connection has been closed";
719	+	break;
720	+	case SSL_ERROR_WANT_READ:
721	+	case SSL_ERROR_WANT_WRITE:
722	+	case SSL_ERROR_WANT_CONNECT:
723	+	//      case SSL_ERROR_WANT_ACCEPT:
724	+	case SSL_ERROR_WANT_X509_LOOKUP:
725	+	error = "The operation did not complete";
726	+	break;
727	+	case SSL_ERROR_SYSCALL:
728	+	if (int err = ERR_get_error() != 0)
729	+	{
730	+	error = ERR_reason_error_string(err);
731	+	}
732	+	else
733	+	{
734	+	switch (number)
735	+	{
736	+	case 0:
737	+	error = "An EOF was observed that violates the protocol";
738	+	break;
739	+	case -1:
740	+	this->error(prefix);
741	+	return;
742	+	default:
743	+	error = "Unknown error";
744	+	break;
745	+	}
746	+	}
747	+	break;
748	+	case SSL_ERROR_SSL:
749	+	error = ERR_reason_error_string(ERR_get_error());
750	+	break;
751	+	default:
752	+	error = "Unknown error";
753	+	break;
754	+	}
755	+
756	+	cerr << prefix << ": " << error << "\n";
757	+	}
758	+
759	+	bool HttpHandler::starttls()
760	+	{
761	+	SSL_load_error_strings();
762	+	SSL_library_init();
763	+
764	+	//
765	+
766	+	return true;
767	+	}
768	+	#endif

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