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root/proj/trunk/Search/HttpHandler.cpp

Comparing trunk/Search/HttpHandler.cpp (file contents):
Revision 13 by douglas, 2002-12-06T19:56:56-08:00 vs.
Revision 20 by douglas, 2002-12-10T14:04:39-08:00

#	Line 52 | Line 52
52
53		HttpHandler::HttpHandler()
54		{
55	+	buffer = new char[BUFSIZ + 1];
56	+
57		#ifdef _WIN32
58	<	WSADATA data;
57	<	if (WSAStartup(MAKEWORD(2, 0) != 0, &data))
58	>	if (WSAStartup(MAKEWORD(2, 0), &data) != 0)
59		{
60	<	error(program + ": WSAStartup()");
60	>	error(program + ": WSAStartup");
61		exit(1);
62		}
63		#endif // _WIN32
64
65	<	begin = 0;
65	>	length = 0;
66	>	chunked = false;
67		}
68
69		HttpHandler::~HttpHandler()
70		{
71	+	delete [] buffer;
72	+
73		#ifdef _WIN32
74		WSACleanup();
75		#endif // _WIN32
76		}
77
78	<	bool HttpHandler::connect(URL &url, bool head)
78	>	bool HttpHandler::handle(URL &url, bool head)
79		{
80		bool answer = false;
81
82	<	//      if (status != JNI_ERR)
83	<	//      {
84	<	//              if (cls != 0)
85	<	//              {
86	<	//                      if (mid != 0)
87	<	//                      {
88	<	//                              jstring addressJ = env->NewStringUTF(url.getAddress().c_str());
89	<	//                              jint portJ = url.getPort();
90	<	//                              jstring pathJ = env->NewStringUTF(url.getPath().c_str());
91	<	//                              jstring programNameJ = env->NewStringUTF(programName.c_str());
92	<	//                              jstring programVersionJ =
93	<	//                                      env->NewStringUTF(programVersion.c_str());
94	<
95	<	//                              jstring pageJ = (jstring)env->CallStaticObjectMethod(cls, mid,
96	<	//                                      addressJ, portJ, pathJ, programNameJ, programVersionJ);
97	<
98	<	//                              const char* pageC = env->GetStringUTFChars(pageJ, 0);
99	<	//                              page = pageC;
100	<	//                              env->ReleaseStringUTFChars(pageJ, pageC);
101	<
102	<	//                              if (page != "unknown host\n" && page != "io exception\n" &&
103	<	//                                      page != "bad headers\n") answer = true;
104	<	//                      }
105	<	//              }
106	<	//      }
82	>	if ((http = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
83	>	{
84	>	error(program + ": Socket");
85	>	exit(1);
86	>	}
87	>
88	>	sockaddr_in address;
89	>	hostent* host;
90	>
91	>	address.sin_family = AF_INET;
92	>
93	>	if ((host = gethostbyname(url.getAddress().c_str())) == NULL)
94	>	{
95	>	error(program + ": Host: " + url.getAddress(), true);
96	>	return answer;
97	>	}
98	>
99	>	address.sin_addr = *((in_addr*)*host->h_addr_list);
100	>	address.sin_port = htons(url.getPort());
101	>
102	>	if (connect(http, (sockaddr*)&address, sizeof(sockaddr_in)) ==
103	>	SOCKET_ERROR)
104	>	{
105	>	error(program + ": Connect");
106	>	return answer;
107	>	}
108	>
109	>	if (head)
110	>	{
111	>	putline("HEAD " + url.getPath() + " HTTP/1.1");
112	>	}
113	>	else
114	>	{
115	>	putline("GET " + url.getPath() + " HTTP/1.1");
116	>	}
117	>
118	>	putline("Accept: text/html; text/plain");
119	>	putline("User-Agent: " + agent(true) + ' ' + platform());
120	>
121	>	if (url.getPort() == 80)
122	>	{
123	>	putline("Host: " + url.getAddress());
124	>	}
125	>	else
126	>	{
127	>	char* port = new char[1024];
128	>	sprintf(port, "%u", url.getPort());
129	>
130	>	putline("Host: " + url.getAddress() + ':' + port);
131	>
132	>	delete [] port;
133	>	}
134	>
135	>	//      putline("Referer: " + ?referer?);
136	>	putline("Connection: close");
137	>	putline();
138	>
139	>	code response;
140	>	string line;
141	>
142	>	do
143	>	{
144	>	line = getline();
145	>
146	>	if (line.find("HTTP/") != 0)
147	>	{
148	>	return answer;
149	>	}
150	>
151	>	unsigned dot = line.find('.');
152	>	unsigned space = line.find(' ');
153	>
154	>	unsigned major = strtoul(line.substr(5, dot - 5).c_str(), 0, 10);
155	>	unsigned minor = strtoul(line.substr(dot + 1, space - dot - 1).c_str(),
156	>	0, 10);
157	>
158	>	if (major > 1 || minor < 1)
159	>	{
160	>	cerr << program << ": Potentially Incompatible Server: HTTP/" <<
161	>	major << "." << minor << "\n";
162	>
163	>	return answer;
164	>	}
165	>
166	>	response = code(strtoul(line.substr(space + 1).c_str(), 0, 10));
167	>
168	>	if (response < ok) do line = getline(); while (line != "");
169	>	}
170	>	while (response < ok);
171	>
172	>	do
173	>	{
174	>	line = getline();
175	>
176	>	if (line != "")
177	>	{
178	>	unsigned colon = line.find(':');
179	>
180	>	string field = line.substr(0, colon);
181	>	string value = line.substr(colon + 1);
182	>
183	>	while (isspace(value[0])) value.erase(0, 1);
184	>
185	>	if (field == "Content-Type")
186	>	{
187	>	type = value;
188	>	}
189	>	else if (field == "Content-Length")
190	>	{
191	>	length = strtoul(value.c_str(), 0, 10);
192	>	}
193	>	else if (field == "Location")
194	>	{
195	>	location = value;
196	>	}
197	>	else if (field == "Transfer-Encoding")
198	>	{
199	>	chunked = value == "chunked";
200	>	}
201	>	}
202	>	}
203	>	while (line != "");
204	>
205	>	switch (response)
206	>	{
207	>	case ok:
208	>	if (debug) cerr << "response = " << response << "\n";
209	>	answer = true;
210	>	break;
211	>	case choices:
212	>	case moved:
213	>	case found:
214	>	if (debug) cerr << "response = " << response << "\n"
215	>	<< "location = " << location << "\n";
216	>	location = getLink(location, url);
217	>	break;
218	>	case notfound:
219	>	case internal:
220	>	if (debug) cerr << "response = " << response << "\n";
221	>	break;
222	>	default:
223	>	if (debug) cerr << "response = " << response << "\n";
224	>	if (response <= 299)
225	>	{
226	>	answer = true;
227	>	}
228	>	else if (response <= 399)
229	>	{
230	>	location = getLink(location, url);
231	>	}
232	>	break;
233	>	}
234	>
235	>	if (!head && answer) populate();
236
237		return answer;
238		}
239
240		HttpHandler& HttpHandler::getline(string& line, char endline)
241		{
242	<	int end = page.find(endline, begin);
243	<	int newline = page.find('\n', begin);
242	>	int end = page.find(endline);
243	>	int newline = page.find('\n');
244
245		if (newline < end || end == string::npos)
246		{
247		end = newline;
248		}
249
250	<	line = page.substr(begin, end - begin);
250	>	line = page.substr(0, end);
251	>	page.erase(0, (end == string::npos ? end : end + 1));
252
253	<	if (end == string::npos)
254	<	{
121	<	begin = end;
122	<	}
123	<	else
124	<	{
125	<	begin = end + 1;
126	<	}
253	>	//      if (line == "") cerr << "line = [" << line << "]\npage = [" << page
254	>	//              << "]" << (good() ? "true" : "false") << "\n";
255
256		return *this;
257		}
258
259	<	bool HttpHandler::good()
259	>	void HttpHandler::clear()
260	>	{
261	>	closesocket(http);
262	>
263	>	type = "";
264	>	length = 0;
265	>	location = "";
266	>	page = "";
267	>	chunked = false;
268	>	}
269	>
270	>	void HttpHandler::populate()
271		{
272	<	bool answer = true;
272	>	if (!chunked)
273	>	{
274	>	unsigned left = length;
275
276	<	if (begin >= page.length())
276	>	while (left > 0)
277	>	{
278	>	memset(buffer, 0, BUFSIZ + 1);
279	>
280	>	unsigned bytes = left > BUFSIZ ? BUFSIZ : left;
281	>
282	>	if (recv(http, buffer, bytes, 0) == SOCKET_ERROR)
283	>	{
284	>	error(program + ": Recv");
285	>	exit(1);
286	>	}
287	>
288	>	page += buffer;
289	>	left -= bytes;
290	>	}
291	>	}
292	>	else
293		{
294	<	answer = false;
294	>	unsigned chunk;
295	>
296	>	do
297	>	{
298	>	chunk = strtoul(getline().c_str(), 0, 16);
299	>
300	>	unsigned left = chunk;
301	>
302	>	while (left > 0)
303	>	{
304	>	memset(buffer, 0, BUFSIZ + 1);
305	>
306	>	unsigned bytes = left > BUFSIZ ? BUFSIZ : left;
307	>
308	>	if (recv(http, buffer, bytes, 0) == SOCKET_ERROR)
309	>	{
310	>	error(program + ": Recv");
311	>	exit(1);
312	>	}
313	>
314	>	page += buffer;
315	>	left -= bytes;
316	>	}
317	>
318	>	getline();
319	>	length += chunk;
320	>	}
321	>	while (chunk > 0);
322		}
323	<	else if (begin == string::npos)
323	>
324	>	for (unsigned index = 0; index < page.length(); index++)
325		{
326	<	answer = false;
326	>	if (page[index] == '\r' && (index + 1 < page.length()) ? page[index +
327	>	1] == '\n' : false)
328	>	{
329	>	page.erase(index, 1);
330	>	}
331	>	else if (page[index] == '\r')
332	>	{
333	>	page[index] = '\n';
334	>	}
335		}
336	+	}
337
338	<	return answer;
338	>	void HttpHandler::putline(const string line)
339	>	{
340	>	sprintf(buffer, "%s\r\n", line.c_str());
341	>	if (send(http, buffer, strlen(buffer), 0) == SOCKET_ERROR)
342	>	{
343	>	error(program + ": Send");
344	>	exit(1);
345	>	}
346		}
347
348	<	void HttpHandler::clear()
348	>	string HttpHandler::getline()
349		{
350	<	begin = 0;
351	<	page = "";
350	>	string line;
351	>	char byte;
352	>
353	>	do
354	>	{
355	>	if (recv(http, &byte, 1, 0) == SOCKET_ERROR)
356	>	{
357	>	error(program + ": Recv");
358	>	}
359	>
360	>	if (byte != '\r' && byte != '\n')
361	>	{
362	>	line += byte;
363	>	}
364	>	}
365	>	while (byte != '\n');
366	>
367	>	return line;
368		}
369
370	<	void HttpHandler::error(const string prefix, bool host)
370	>	void HttpHandler::error(const string& prefix, bool host)
371		{
372		#ifdef _WIN32
373		string error;

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