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root/proj/trunk/Search/HttpHandler.cpp

Comparing trunk/Search/HttpHandler.cpp (file contents):
Revision 14 by douglas, 2002-12-07T00:19:03-08:00 vs.
Revision 25 by douglas, 2002-12-22T23:32:58-08:00

#	Line 57 | Line 57 | HttpHandler::HttpHandler()
57		#ifdef _WIN32
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()
#	Line 74 | Line 75 | HttpHandler::~HttpHandler()
75		#endif // _WIN32
76		}
77
78	<	bool HttpHandler::handle(URL &url, bool head)
78	>	bool HttpHandler::handle(URL &url, const string referer, bool head)
79		{
80		bool answer = false;
81
#	Line 131 | Line 132 | bool HttpHandler::handle(URL &url, bool
132		delete [] port;
133		}
134
135	+	if (referer != "")
136	+	{
137	+	putline("Referer: " + referer);
138	+	}
139	+
140	+	putline("Connection: close");
141		putline();
142
143	+	code response;
144	+	string line;
145	+
146	+	do
147	+	{
148	+	line = getline();
149	+
150	+	if (line.find("HTTP/") != 0)
151	+	{
152	+	return answer;
153	+	}
154	+
155	+	unsigned dot = line.find('.');
156	+	unsigned space = line.find(' ');
157	+
158	+	unsigned major = strtoul(line.substr(5, dot - 5).c_str(), 0, 10);
159	+	unsigned minor = strtoul(line.substr(dot + 1, space - dot - 1).c_str(),
160	+	0, 10);
161	+
162	+	if (major > 1)
163	+	{
164	+	cerr << program << ": Potentially Incompatible Server: HTTP/" <<
165	+	major << "." << minor << "\n";
166	+
167	+	return answer;
168	+	}
169	+
170	+	response = code(strtoul(line.substr(space + 1).c_str(), 0, 10));
171	+
172	+	if (response < ok) do line = getline(); while (line != "");
173	+	}
174	+	while (response < ok);
175	+
176	+	do
177	+	{
178	+	line = getline();
179	+
180	+	if (line != "")
181	+	{
182	+	unsigned colon = line.find(':');
183	+
184	+	string field = line.substr(0, colon);
185	+	string value = line.substr(colon + 1);
186	+
187	+	while (isspace(value[0])) value.erase(0, 1);
188	+
189	+	if (field == "Content-Type")
190	+	{
191	+	type = value;
192	+	}
193	+	else if (field == "Content-Length")
194	+	{
195	+	length = strtoul(value.c_str(), 0, 10);
196	+	}
197	+	else if (field == "Location")
198	+	{
199	+	location = value;
200	+	}
201	+	else if (field == "Transfer-Encoding")
202	+	{
203	+	chunked = value == "chunked";
204	+	}
205	+	}
206	+	}
207	+	while (line != "");
208	+
209	+	switch (response)
210	+	{
211	+	case ok:
212	+	if (debug) cerr << "response = " << response << "\n";
213	+	answer = true;
214	+	break;
215	+	case choices:
216	+	case moved:
217	+	case found:
218	+	if (debug) cerr << "response = " << response << "\n"
219	+	<< "location = " << location << "\n";
220	+	location = getLink(location, url);
221	+	break;
222	+	case notfound:
223	+	case internal:
224	+	if (debug) cerr << "response = " << response << "\n";
225	+	break;
226	+	default:
227	+	if (debug) cerr << "response = " << response << "\n";
228	+	if (response <= 299)
229	+	{
230	+	answer = true;
231	+	}
232	+	else if (response <= 399)
233	+	{
234	+	location = getLink(location, url);
235	+	}
236	+	break;
237	+	}
238	+
239	+	if (!head && answer) populate();
240	+
241		return answer;
242		}
243
244		HttpHandler& HttpHandler::getline(string& line, char endline)
245		{
246	<	int end = page.find(endline, begin);
247	<	int newline = page.find('\n', begin);
246	>	unsigned end = page.find(endline);
247	>	unsigned newline = page.find('\n');
248
249		if (newline < end || end == string::npos)
250		{
251		end = newline;
252		}
253
254	<	line = page.substr(begin, end - begin);
255	<
151	<	if (end == string::npos)
152	<	{
153	<	begin = end;
154	<	}
155	<	else
156	<	{
157	<	begin = end + 1;
158	<	}
254	>	line = page.substr(0, end);
255	>	page.erase(0, (end == string::npos ? end : end + 1));
256
257		return *this;
258		}
259
260	<	bool HttpHandler::good()
260	>	void HttpHandler::clear()
261		{
262	<	bool answer = true;
262	>	closesocket(http);
263	>
264	>	type = "";
265	>	length = 0;
266	>	location = "";
267	>	page = "";
268	>	chunked = false;
269	>	}
270
271	<	if (begin >= page.length())
271	>	void HttpHandler::populate()
272	>	{
273	>	if (!chunked)
274		{
275	<	answer = false;
275	>	unsigned left = length;
276	>
277	>	while (left > 0)
278	>	{
279	>	memset(buffer, 0, BUFSIZ + 1);
280	>
281	>	unsigned bytes = left > BUFSIZ ? BUFSIZ : left;
282	>	unsigned received;
283	>
284	>	if ((received = recv(http, buffer, bytes, 0)) == SOCKET_ERROR)
285	>	{
286	>	error(program + ": Recv");
287	>	exit(1);
288	>	}
289	>	else if (received != bytes)
290	>	{
291	>	left -= received;
292	>	page += buffer;
293	>
294	>	memset(buffer, 0, BUFSIZ + 1);
295	>
296	>	bytes -= received;
297	>	if (recv(http, buffer, bytes, 0) == SOCKET_ERROR)
298	>	{
299	>	error(program + ": Recv");
300	>	exit(1);
301	>	}
302	>	}
303	>
304	>	page += buffer;
305	>	left -= bytes;
306	>	}
307		}
308	<	else if (begin == string::npos)
308	>	else
309		{
310	<	answer = false;
174	<	}
175	<
176	<	return answer;
177	<	}
310	>	unsigned chunk;
311
312	<	void HttpHandler::clear()
313	<	{
314	<	begin = 0;
315	<	page = "";
312	>	do
313	>	{
314	>	chunk = strtoul(getline().c_str(), 0, 16);
315	>
316	>	unsigned left = chunk;
317	>
318	>	while (left > 0)
319	>	{
320	>	memset(buffer, 0, BUFSIZ + 1);
321	>
322	>	unsigned bytes = left > BUFSIZ ? BUFSIZ : left;
323	>	unsigned received;
324	>
325	>	if ((received = recv(http, buffer, bytes, 0)) == SOCKET_ERROR)
326	>	{
327	>	error(program + ": Recv");
328	>	exit(1);
329	>	}
330	>	else if (received != bytes)
331	>	{
332	>	left -= received;
333	>	page += buffer;
334	>
335	>	memset(buffer, 0, BUFSIZ + 1);
336	>
337	>	bytes -= received;
338	>	if (recv(http, buffer, bytes, 0) == SOCKET_ERROR)
339	>	{
340	>	error(program + ": Recv");
341	>	exit(1);
342	>	}
343	>	}
344	>
345	>	page += buffer;
346	>	left -= bytes;
347	>	}
348	>
349	>	getline();
350	>	length += chunk;
351	>	}
352	>	while (chunk > 0);
353	>	}
354	>
355	>	for (unsigned index = 0; index < page.length(); index++)
356	>	{
357	>	if (page[index] == '\r' && (index + 1 < page.length()) ? page[index +
358	>	1] == '\n' : false)
359	>	{
360	>	page.erase(index, 1);
361	>	}
362	>	else if (page[index] == '\r')
363	>	{
364	>	page[index] = '\n';
365	>	}
366	>	}
367		}
368
369		void HttpHandler::putline(const string line)
#	Line 192 | Line 376 | void HttpHandler::putline(const string l
376		}
377		}
378
379	<	void HttpHandler::error(const string prefix, bool host)
379	>	string HttpHandler::getline()
380	>	{
381	>	string line;
382	>	char byte;
383	>
384	>	do
385	>	{
386	>	if (recv(http, &byte, 1, 0) == SOCKET_ERROR)
387	>	{
388	>	error(program + ": Recv");
389	>	}
390	>
391	>	if (byte != '\r' && byte != '\n')
392	>	{
393	>	line += byte;
394	>	}
395	>	}
396	>	while (byte != '\n');
397	>
398	>	return line;
399	>	}
400	>
401	>	void HttpHandler::error(const string& prefix, bool host)
402		{
403		#ifdef _WIN32
404		string error;

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