trunk/Src/wptHTTP.cpp

/* wptHTTP.cpp - Generic HTTP support
 *      Copyright (C) 2004, 2005, 2006 Timo Schulz
 *
 * This file is part of WinPT.
 *
 * WinPT 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; either version 2 
 * of the License, or (at your option) any later version.
 *  
 * WinPT 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 WinPT; if not, write to the Free Software Foundation, 
 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>
#include <ctype.h>
#include <errno.h>

#include "wptHTTP.h"
#include "wptTypes.h"
#include "wptErrors.h"


/* Empty constructur to allow advanced requests. */
wHTTP::wHTTP (void)
{
    reset ();
}


/* Constructur to allow alternative syntax. */
wHTTP::wHTTP (const char *_host, int _port, const char *_url)
{
    reset ();
    this->host = strdup (_host);
    this->port = _port;
    this->url = strdup (_url);
    if (!sendRequest (_host, _port, _url))
        parseResponse (&statcode);

}


/* Standard constructur. */
wHTTP::wHTTP (const char *_url)
{
    reset ();
    extractHostInfo (_url, &this->host, &this->url);
    /* XXX: if the connection fails, return the error code to the user. */
    if (!sendRequest (this->host, this->port, this->url))
        parseResponse (&statcode);
}


/* Reset object contents for first use. */
void
wHTTP::reset (void)
{
    ver = 1;
    port = 80;
    host = url = NULL;
    req_headers = resp_headers = NULL;
    fd = statcode = 0;
    method = HTTP_GET;
    nleft = -1;
    error = 0;
}


/* Perform a HTTP 'HEAD' request. */
int
wHTTP::head (const char *_url)
{
    safe_free (host);
    safe_free (url);

    extractHostInfo (_url, &this->host, &this->url);
    method = HTTP_HEAD;

    if (!sendRequest (host, port, url))
        parseResponse (&statcode);

    return 0;
}


/* Perform a HTTP 'GET' request. */
int
wHTTP::get (const char *_url)
{
    safe_free (host);
    safe_free (url);

    extractHostInfo (_url, &this->host, &this->url);

    method = HTTP_GET;
    if (!sendRequest (this->host, this->port, this->url))
        parseResponse (&statcode);

    return 0;
}


/* Return HTTP status code. */
int 
wHTTP::getStatusCode (void)
{
    return statcode;
}


/* Return MIME content type. */
const char*
wHTTP::getContentType (void)
{
    const char *type = NULL;

    findHeader (resp_headers, "Content-Type", &type);
    return type;
}


/* Return content length. */
unsigned int
wHTTP::getContentLength (void)
{
    const char *len = NULL;

    if (findHeader (resp_headers, "Content-Length", &len))
        return strtoul (len, NULL, 10);
    return 0;
}


void
wHTTP::addHeader (http_head_t *root, const char *val)
{
    http_head_t n, t;
    
    t = (http_head_t)calloc (1, sizeof *t+strlen (val)+2);
    if (!t)
        BUG (0);
    strcpy (t->d, val);

    if (!*root)
        *root = t;
    else {
        for (n = *root; n->next; n=n->next)
            ;
        n->next = t;
    }
}


bool
wHTTP::findHeader (http_head_t root, 
                   const char *name, const char **val)
{
    http_head_t n;
    char *p;
    
    *val = NULL;
    for (n = root; n; n = n->next) {
        if (strlen (n->d) >= strlen (name) &&
            strstr (n->d, name)) {
            p = strchr (n->d, ':');
            *val = p? n->d + (p - n->d + 1 + 1) : NULL;
            return true;
        }
    }
    return false;
}


int
wHTTP::connect (const char *_host, int _port)
{
    struct hostent *hp;
    struct sockaddr_in srv;
    unsigned long addr = 0;
    int i = 1;

    memset (&srv, 0, sizeof srv);
    srv.sin_port = htons ((unsigned short)_port);
    srv.sin_family = AF_INET;
    
    if (isalpha (*_host)) {
        hp = gethostbyname (_host);
        if (!hp) {
            this->error = (int)WSAGetLastError ();
            return WPTERR_WINSOCK_CONNECT;
        }
        memcpy (&srv.sin_addr, hp->h_addr, hp->h_length);
    }
    else {
        addr = inet_addr (_host);
        if (addr == INADDR_NONE) {
            this->error = (int)WSAGetLastError ();
            return WPTERR_WINSOCK_CONNECT;
        }
        memcpy (&srv.sin_addr, &addr, sizeof addr);
    }
            
    fd = socket (AF_INET, SOCK_STREAM, 0);
    if (fd < 0) {
        this->error = (int)WSAGetLastError ();
        return WPTERR_WINSOCK_SOCKET;
    }

    if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, 
                    (const char*)&i, sizeof i)) {
        closesocket (fd);
        fd = 0;
        this->error = (int)WSAGetLastError ();
        return WPTERR_WINSOCK_SOCKET;
    }
    
    if (::connect (fd, (struct sockaddr *)&srv, sizeof srv)) {
        closesocket (fd);
        fd = 0;
        this->error = (int)WSAGetLastError ();
        return WPTERR_WINSOCK_CONNECT;
    }

    return 0;
}


int
wHTTP::isDataAvailable (int _fd)
{
    struct timeval tv;
    fd_set inp;
    int n;

    FD_ZERO (&inp);
    FD_SET (_fd, &inp);
    tv.tv_sec = 1;
    tv.tv_usec = 0;

    n = select (_fd+1, &inp, NULL, NULL, &tv);
    if (n && FD_ISSET (_fd, &inp))
        return n;
    return 0;
}


int
wHTTP::readLine (char *buf, unsigned int nbuf,
                 int nonblock, int *nn, int *eof)
{
    char c;
    int n, i;
    
    if (nn)
        *nn = 0;
    if (eof)
        *eof = 0;
    i = 0;
    do {
        if (nonblock == 1 && isDataAvailable (fd) == 0) {
            buf[i++] = '\0';
            i = -1;
            break;
        }
        n = recv (fd, &c, 1, 0);
        if (n == -1) {
            this->error = (int)WSAGetLastError ();
            break;
        }
        if (n == 0 || nbuf == 0 || c == '\n') {
            if (n == 0) {
                if (eof)
                    *eof = 1;
                buf[i++] = '\0';
            }
            else {
                buf[i++] = c;
                buf[i] = '\0';
            }
            break;
        }
        else {
            buf[i++] = c;
            nbuf--;
        }
    } while (n > 0 && i != -1);
    
    if (nn)
        *nn = i;
    return 0;
}


/* Extract the host from the given url @url. Return the host in
   @host and also return the resource part of the url in @new_url. */
int
wHTTP::extractHostInfo (const char *_url, char **_host, char **new_url)
{
    char *p;
    char tmpbuf[512];

    *_host = NULL;
    *new_url = NULL;

    /* XXX: do not use static buffers. */
    memset (tmpbuf, 0, sizeof (tmpbuf));
    strncpy (tmpbuf, _url, sizeof (tmpbuf)-1);
    
    p = "http://";
    if (strlen (_url) < 10 || strncmp (_url, p, 7))
        return WPTERR_GENERAL;
    _url += strlen (p);
    p = strtok (tmpbuf+7, "/");
    if (!p)
        return WPTERR_GENERAL;
    *_host = strdup (p);
    p = strchr (_url, '/');
    if (!p) {
        safe_free (*_host);
        return WPTERR_GENERAL;
    }
    *new_url = strdup (p);
    return 0;
}


/* Add a request header. */
int 
wHTTP::addRequestHeader (const char *name, const char *val)
{
    char *p;
    char *fmt = "%s: %s";

    p = (char*) malloc (strlen (name)+strlen (val)+strlen (fmt)+4);
    sprintf (p, fmt, name, val);
    addHeader (&req_headers, p);
    safe_free (p);

    return 0;
}


void 
wHTTP::setVersion (int _ver)
{
    if (_ver > 9)
        _ver = 0;
    this->ver = _ver;
}


int
wHTTP::addRequestHeader (const char *name, unsigned int val)
{
    char buf[32];

    sprintf (buf, "%lu", (DWORD)val);
    return addRequestHeader (name, buf);
}


/* Prepare the request resource @url and send 
   it to host @host (port @port). */
int
wHTTP::sendRequest (const char *_host, int _port, const char *_url)
{
    const char *id[] = {"GET", "HEAD", "PUT", "POST"};
    http_head_t h;
    const char *h_head;
    char *p;
    int n;
    int rc;

    if (!this->fd) {
        rc = connect (_host, _port);
        if (rc)
            return rc;
    }

    if (*_url == '/')
        _url++;
    if (_url == NULL)
        _url = "";

    addRequestHeader ("Host", _host);
    if (ver < 1)
        addRequestHeader ("Connection", "close");

    n = 0;
    for (h = req_headers; h; h = h->next)
        n += strlen (h->d) + 2 + 1;
    h_head = "%s /%s HTTP/1.%d\r\n";
    n += strlen (id[method]) + strlen (h_head)
         + strlen (_url) + n + 2 + 1 + 4;
    p = (char*)calloc (1, n+1);
    if (!p)
        BUG (0);
    sprintf (p, h_head, id[method], _url, ver);
    for (h = req_headers; h; h = h->next) {
        strcat (p, h->d);
        strcat (p, "\r\n");
    }
    strcat (p, "\r\n");
    n = send (fd, p, strlen (p), 0);
    safe_free (p);
    return n > 0? 0 : WPTERR_GENERAL;
}


/* Parse all response resp_headers. */
int
wHTTP::parseHeaders (http_head_t *r_head)
{
    char buf[300];
    int nn;
    int rc;
    
    if (!r_head)
        return WPTERR_GENERAL;

    do  {
        rc = readLine (buf, 299, 1, &nn, NULL);
        if (rc)
            return rc;
        if (nn == 2)
            break; /* reach empty line */
        addHeader (r_head, buf);
    } while (rc == 0);
    return 0;
}


/* Read data from the response and write it to @out. */
int
wHTTP::readData (FILE *out)
{
    const char *val;
    char buf[1024+1];
    int nlen = 0, nn = 0, n, eof=0;
    int rc = 0;
    
    if (this->fd == 0 || this->resp_headers == NULL)
        return -1;

    nlen = getContentLength ();
    if (nlen == 0) {
        if (!findHeader (resp_headers, "Connection", &val) ||
            strnicmp (val, "close", 4))
            return WPTERR_GENERAL;
    }

    val = getContentType ();
    if (!val)
        return WPTERR_GENERAL;
    if (strnicmp (val, "text", 4)) { /* binary */
        do {
            n = recv (fd, buf, nlen > 1024? 1024 : nlen, 0);
            if (n == -1) {
                this->error = (int)WSAGetLastError ();
                return SOCKET_ERROR;
            }
            if (n == 0)
                break;
            nlen -= n;
            fwrite (buf, 1, n, out);
        } while (nlen > 0);
        return 0;
    }

    do {
        rc = readLine (buf, sizeof (buf)-1, 1, &n, &eof);
        if (rc)
            return rc;
        if (n > 0)
            fwrite (buf, 1, n, out);
        if (nlen > 0) {
            nn += n;
            if (nlen == nn)
                break;
        }
    } while (eof == 0);

    return 0;
}


/* Parse the HTTP response line. */
int
wHTTP::parseResponse (int *_statcode)
{
    http_head_t n;
    const char *tmp, *p;
    char buf[300];
    int code = 0, nn = 0;
    int rc;

    *_statcode = 0;
    rc = readLine (buf, 299, 1, &nn, NULL);
    if (rc)
        return rc;

    tmp = "HTTP/1.";
    if (strlen (buf) < 8 || strncmp (buf, tmp, strlen (tmp)))
        return WPTERR_GENERAL;
    p = buf;
    p += strlen (tmp)+1 + 1; /* skip HTTP/1.x and WS */
    *_statcode = atoi (p);
    if (tmp == 0)
        return WPTERR_GENERAL;
    p += 3 + 1; /* number + WS */

    if (code == HTTP_STAT_400 ||            
        code == HTTP_STAT_403 ||
        code == HTTP_STAT_404 ||
        code == HTTP_STAT_405)
        return WPTERR_GENERAL;

    while (resp_headers) {
        n = resp_headers->next;
        free (resp_headers);
        resp_headers = n;
    }
    resp_headers = NULL;
    rc = parseHeaders (&resp_headers);
    if (rc)
        return rc;
    return 0;
}


/* Destroy HTTP object. */
wHTTP::~wHTTP (void)
{
    http_head_t h;
    
    while (resp_headers) {
        h = resp_headers->next;
        free (resp_headers);
        resp_headers = h;
    }
    while (req_headers) {
        h = req_headers->next;
        free (req_headers);
        req_headers = h;
    }
    safe_free (url);
    safe_free (host);
    if (fd != 0) {
        closesocket (fd);
        fd = 0;
    }
}


/* Read @buflen bytes from the http stream into the buffer @buf. */
int
wHTTP::read (void *buf, unsigned int buflen)
{
    int n;

    if (this->fd == 0 || this->resp_headers == NULL)
        return -1;
    if (method != HTTP_GET)
        return -1;

    if (nleft == -1)
        nleft = getContentLength ();
    if ((int)buflen > nleft)
        buflen = nleft;
    if (nleft == 0)
        return -1;

    n = recv (fd, (char*)buf, (int)buflen, 0);
    if (n > 0) {
        nleft -= n;
        if (nleft < 0) nleft = 0;
    }
    return n;
}


/* Write the buffer @buf to the http stream. */
int
wHTTP::write (const void *buf, unsigned buflen)
{
    if (this->fd == 0)
        return -1;
    if (method == HTTP_GET || method == HTTP_HEAD)
        return -1;
    return send (fd, (const char*)buf, (int)buflen, 0);
}


/* Return the Winsock specific error code. */
int wHTTP::getErrorCode (void)
{
    return error;
}
1	twoaday	181	/* wptHTTP.cpp - Generic HTTP support
2			* Copyright (C) 2004, 2005, 2006 Timo Schulz
3			*
4			* This file is part of WinPT.
5			*
6			* WinPT is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU General Public License
8			* as published by the Free Software Foundation; either version 2
9			* of the License, or (at your option) any later version.
10			*
11			* WinPT is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with WinPT; if not, write to the Free Software Foundation,
18			* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19			*/
20			#ifdef HAVE_CONFIG_H
21			#include <config.h>
22			#endif
23
24			#include <stdio.h>
25			#include <stdio.h>
26			#include <stdlib.h>
27			#include <string.h>
28			#include <windows.h>
29			#include <ctype.h>
30			#include <errno.h>
31
32			#include "wptHTTP.h"
33			#include "wptTypes.h"
34			#include "wptErrors.h"
35
36
37			/* Empty constructur to allow advanced requests. */
38			wHTTP::wHTTP (void)
39			{
40			reset ();
41			}
42
43
44			/* Constructur to allow alternative syntax. */
45			wHTTP::wHTTP (const char _host, int _port, const char _url)
46			{
47			reset ();
48			this->host = strdup (_host);
49			this->port = _port;
50			this->url = strdup (_url);
51			if (!sendRequest (_host, _port, _url))
52			parseResponse (&statcode);
53
54			}
55
56
57			/* Standard constructur. */
58			wHTTP::wHTTP (const char *_url)
59			{
60			reset ();
61			extractHostInfo (_url, &this->host, &this->url);
62			/* XXX: if the connection fails, return the error code to the user. */
63			if (!sendRequest (this->host, this->port, this->url))
64			parseResponse (&statcode);
65			}
66
67
68			/* Reset object contents for first use. */
69			void
70			wHTTP::reset (void)
71			{
72			ver = 1;
73			port = 80;
74			host = url = NULL;
75			req_headers = resp_headers = NULL;
76			fd = statcode = 0;
77			method = HTTP_GET;
78			nleft = -1;
79	twoaday	200	error = 0;
80	twoaday	181	}
81
82
83			/* Perform a HTTP 'HEAD' request. */
84			int
85			wHTTP::head (const char *_url)
86			{
87	twoaday	260	safe_free (host);
88			safe_free (url);
89	twoaday	181
90			extractHostInfo (_url, &this->host, &this->url);
91			method = HTTP_HEAD;
92
93			if (!sendRequest (host, port, url))
94			parseResponse (&statcode);
95
96			return 0;
97			}
98
99
100			/* Perform a HTTP 'GET' request. */
101			int
102			wHTTP::get (const char *_url)
103			{
104	twoaday	260	safe_free (host);
105			safe_free (url);
106	twoaday	181
107			extractHostInfo (_url, &this->host, &this->url);
108
109			method = HTTP_GET;
110			if (!sendRequest (this->host, this->port, this->url))
111			parseResponse (&statcode);
112
113			return 0;
114			}
115
116
117			/* Return HTTP status code. */
118			int
119			wHTTP::getStatusCode (void)
120			{
121			return statcode;
122			}
123
124
125			/* Return MIME content type. */
126			const char*
127			wHTTP::getContentType (void)
128			{
129			const char *type = NULL;
130
131			findHeader (resp_headers, "Content-Type", &type);
132			return type;
133			}
134
135
136			/* Return content length. */
137			unsigned int
138			wHTTP::getContentLength (void)
139			{
140			const char *len = NULL;
141
142			if (findHeader (resp_headers, "Content-Length", &len))
143			return strtoul (len, NULL, 10);
144			return 0;
145			}
146
147
148			void
149			wHTTP::addHeader (http_head_t root, const char val)
150			{
151			http_head_t n, t;
152
153			t = (http_head_t)calloc (1, sizeof *t+strlen (val)+2);
154			if (!t)
155			BUG (0);
156			strcpy (t->d, val);
157
158			if (!*root)
159			*root = t;
160			else {
161			for (n = *root; n->next; n=n->next)
162			;
163			n->next = t;
164			}
165			}
166
167
168			bool
169			wHTTP::findHeader (http_head_t root,
170			const char name, const char *val)
171			{
172			http_head_t n;
173			char *p;
174
175			*val = NULL;
176			for (n = root; n; n = n->next) {
177			if (strlen (n->d) >= strlen (name) &&
178			strstr (n->d, name)) {
179			p = strchr (n->d, ':');
180			*val = p? n->d + (p - n->d + 1 + 1) : NULL;
181			return true;
182			}
183			}
184			return false;
185			}
186
187
188			int
189			wHTTP::connect (const char *_host, int _port)
190			{
191			struct hostent *hp;
192			struct sockaddr_in srv;
193			unsigned long addr = 0;
194			int i = 1;
195
196			memset (&srv, 0, sizeof srv);
197			srv.sin_port = htons ((unsigned short)_port);
198			srv.sin_family = AF_INET;
199
200			if (isalpha (*_host)) {
201			hp = gethostbyname (_host);
202	twoaday	200	if (!hp) {
203			this->error = (int)WSAGetLastError ();
204	twoaday	181	return WPTERR_WINSOCK_CONNECT;
205	twoaday	200	}
206	twoaday	181	memcpy (&srv.sin_addr, hp->h_addr, hp->h_length);
207			}
208			else {
209			addr = inet_addr (_host);
210	twoaday	200	if (addr == INADDR_NONE) {
211			this->error = (int)WSAGetLastError ();
212	twoaday	181	return WPTERR_WINSOCK_CONNECT;
213	twoaday	200	}
214	twoaday	181	memcpy (&srv.sin_addr, &addr, sizeof addr);
215			}
216
217			fd = socket (AF_INET, SOCK_STREAM, 0);
218	twoaday	200	if (fd < 0) {
219			this->error = (int)WSAGetLastError ();
220	twoaday	181	return WPTERR_WINSOCK_SOCKET;
221	twoaday	200	}
222	twoaday	181
223			if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
224			(const char*)&i, sizeof i)) {
225			closesocket (fd);
226			fd = 0;
227	twoaday	200	this->error = (int)WSAGetLastError ();
228	twoaday	181	return WPTERR_WINSOCK_SOCKET;
229			}
230
231			if (::connect (fd, (struct sockaddr *)&srv, sizeof srv)) {
232			closesocket (fd);
233			fd = 0;
234	twoaday	200	this->error = (int)WSAGetLastError ();
235	twoaday	181	return WPTERR_WINSOCK_CONNECT;
236			}
237
238			return 0;
239			}
240
241
242			int
243			wHTTP::isDataAvailable (int _fd)
244			{
245			struct timeval tv;
246			fd_set inp;
247			int n;
248
249			FD_ZERO (&inp);
250			FD_SET (_fd, &inp);
251			tv.tv_sec = 1;
252			tv.tv_usec = 0;
253
254			n = select (_fd+1, &inp, NULL, NULL, &tv);
255			if (n && FD_ISSET (_fd, &inp))
256			return n;
257			return 0;
258			}
259
260
261			int
262			wHTTP::readLine (char *buf, unsigned int nbuf,
263			int nonblock, int nn, int eof)
264			{
265			char c;
266			int n, i;
267
268			if (nn)
269			*nn = 0;
270			if (eof)
271			*eof = 0;
272			i = 0;
273			do {
274			if (nonblock == 1 && isDataAvailable (fd) == 0) {
275			buf[i++] = '\0';
276			i = -1;
277			break;
278			}
279			n = recv (fd, &c, 1, 0);
280	twoaday	260	if (n == -1) {
281			this->error = (int)WSAGetLastError ();
282	twoaday	181	break;
283	twoaday	260	}
284	twoaday	181	if (n == 0 \|\| nbuf == 0 \|\| c == '\n') {
285			if (n == 0) {
286			if (eof)
287			*eof = 1;
288			buf[i++] = '\0';
289			}
290			else {
291			buf[i++] = c;
292			buf[i] = '\0';
293			}
294			break;
295			}
296			else {
297			buf[i++] = c;
298			nbuf--;
299			}
300			} while (n > 0 && i != -1);
301
302			if (nn)
303			*nn = i;
304			return 0;
305			}
306
307
308
309			/* Extract the host from the given url @url. Return the host in
310			@host and also return the resource part of the url in @new_url. */
311			int
312			wHTTP::extractHostInfo (const char _url, char _host, char *new_url)
313			{
314			char *p;
315			char tmpbuf[512];
316
317			*_host = NULL;
318			*new_url = NULL;
319
320			/* XXX: do not use static buffers. */
321			memset (tmpbuf, 0, sizeof (tmpbuf));
322	twoaday	214	strncpy (tmpbuf, _url, sizeof (tmpbuf)-1);
323	twoaday	181
324			p = "http://";
325			if (strlen (_url) < 10 \|\| strncmp (_url, p, 7))
326			return WPTERR_GENERAL;
327			_url += strlen (p);
328			p = strtok (tmpbuf+7, "/");
329			if (!p)
330			return WPTERR_GENERAL;
331			*_host = strdup (p);
332			p = strchr (_url, '/');
333			if (!p) {
334	twoaday	260	safe_free (*_host);
335	twoaday	181	return WPTERR_GENERAL;
336			}
337			*new_url = strdup (p);
338			return 0;
339			}
340
341
342			/* Add a request header. */
343			int
344			wHTTP::addRequestHeader (const char name, const char val)
345			{
346			char *p;
347			char *fmt = "%s: %s";
348
349	twoaday	214	p = (char*) malloc (strlen (name)+strlen (val)+strlen (fmt)+4);
350	twoaday	181	sprintf (p, fmt, name, val);
351			addHeader (&req_headers, p);
352	twoaday	260	safe_free (p);
353	twoaday	181
354			return 0;
355			}
356
357
358			void
359			wHTTP::setVersion (int _ver)
360			{
361			if (_ver > 9)
362			_ver = 0;
363			this->ver = _ver;
364			}
365
366
367			int
368			wHTTP::addRequestHeader (const char *name, unsigned int val)
369			{
370			char buf[32];
371
372			sprintf (buf, "%lu", (DWORD)val);
373			return addRequestHeader (name, buf);
374			}
375
376
377			/* Prepare the request resource @url and send
378			it to host @host (port @port). */
379			int
380			wHTTP::sendRequest (const char _host, int _port, const char _url)
381			{
382			const char *id[] = {"GET", "HEAD", "PUT", "POST"};
383			http_head_t h;
384			const char *h_head;
385			char *p;
386			int n;
387			int rc;
388
389			if (!this->fd) {
390			rc = connect (_host, _port);
391			if (rc)
392			return rc;
393			}
394
395			if (*_url == '/')
396	twoaday	214	_url++;
397	twoaday	181	if (_url == NULL)
398			_url = "";
399
400			addRequestHeader ("Host", _host);
401			if (ver < 1)
402			addRequestHeader ("Connection", "close");
403
404			n = 0;
405			for (h = req_headers; h; h = h->next)
406			n += strlen (h->d) + 2 + 1;
407			h_head = "%s /%s HTTP/1.%d\r\n";
408	twoaday	214	n += strlen (id[method]) + strlen (h_head)
409			+ strlen (_url) + n + 2 + 1 + 4;
410			p = (char*)calloc (1, n+1);
411	twoaday	181	if (!p)
412			BUG (0);
413	twoaday	214	sprintf (p, h_head, id[method], _url, ver);
414	twoaday	181	for (h = req_headers; h; h = h->next) {
415			strcat (p, h->d);
416			strcat (p, "\r\n");
417			}
418			strcat (p, "\r\n");
419			n = send (fd, p, strlen (p), 0);
420	twoaday	260	safe_free (p);
421	twoaday	181	return n > 0? 0 : WPTERR_GENERAL;
422			}
423
424
425			/* Parse all response resp_headers. */
426			int
427			wHTTP::parseHeaders (http_head_t *r_head)
428			{
429			char buf[300];
430			int nn;
431			int rc;
432
433			if (!r_head)
434			return WPTERR_GENERAL;
435
436			do {
437			rc = readLine (buf, 299, 1, &nn, NULL);
438			if (rc)
439			return rc;
440			if (nn == 2)
441			break; /* reach empty line */
442			addHeader (r_head, buf);
443			} while (rc == 0);
444			return 0;
445			}
446
447
448			/* Read data from the response and write it to @out. */
449			int
450			wHTTP::readData (FILE *out)
451			{
452			const char *val;
453			char buf[1024+1];
454			int nlen = 0, nn = 0, n, eof=0;
455			int rc = 0;
456
457			if (this->fd == 0 \|\| this->resp_headers == NULL)
458			return -1;
459
460			nlen = getContentLength ();
461			if (nlen == 0) {
462			if (!findHeader (resp_headers, "Connection", &val) \|\|
463			strnicmp (val, "close", 4))
464			return WPTERR_GENERAL;
465			}
466
467			val = getContentType ();
468			if (!val)
469			return WPTERR_GENERAL;
470			if (strnicmp (val, "text", 4)) { /* binary */
471			do {
472			n = recv (fd, buf, nlen > 1024? 1024 : nlen, 0);
473	twoaday	260	if (n == -1) {
474			this->error = (int)WSAGetLastError ();
475	twoaday	181	return SOCKET_ERROR;
476	twoaday	260	}
477	twoaday	181	if (n == 0)
478			break;
479			nlen -= n;
480			fwrite (buf, 1, n, out);
481			} while (nlen > 0);
482			return 0;
483			}
484
485			do {
486	twoaday	260	rc = readLine (buf, sizeof (buf)-1, 1, &n, &eof);
487	twoaday	181	if (rc)
488			return rc;
489			if (n > 0)
490			fwrite (buf, 1, n, out);
491			if (nlen > 0) {
492			nn += n;
493			if (nlen == nn)
494			break;
495			}
496			} while (eof == 0);
497
498			return 0;
499			}
500
501
502			/* Parse the HTTP response line. */
503			int
504			wHTTP::parseResponse (int *_statcode)
505			{
506			http_head_t n;
507			const char tmp, p;
508			char buf[300];
509			int code = 0, nn = 0;
510			int rc;
511
512			*_statcode = 0;
513			rc = readLine (buf, 299, 1, &nn, NULL);
514			if (rc)
515			return rc;
516
517			tmp = "HTTP/1.";
518			if (strlen (buf) < 8 \|\| strncmp (buf, tmp, strlen (tmp)))
519			return WPTERR_GENERAL;
520			p = buf;
521			p += strlen (tmp)+1 + 1; /* skip HTTP/1.x and WS */
522			*_statcode = atoi (p);
523			if (tmp == 0)
524			return WPTERR_GENERAL;
525			p += 3 + 1; /* number + WS */
526
527			if (code == HTTP_STAT_400 \|\|
528			code == HTTP_STAT_403 \|\|
529			code == HTTP_STAT_404 \|\|
530			code == HTTP_STAT_405)
531			return WPTERR_GENERAL;
532
533			while (resp_headers) {
534			n = resp_headers->next;
535			free (resp_headers);
536			resp_headers = n;
537			}
538			resp_headers = NULL;
539			rc = parseHeaders (&resp_headers);
540			if (rc)
541			return rc;
542			return 0;
543			}
544
545
546			/* Destroy HTTP object. */
547			wHTTP::~wHTTP (void)
548			{
549			http_head_t h;
550
551			while (resp_headers) {
552			h = resp_headers->next;
553			free (resp_headers);
554			resp_headers = h;
555			}
556			while (req_headers) {
557			h = req_headers->next;
558			free (req_headers);
559			req_headers = h;
560			}
561	twoaday	260	safe_free (url);
562			safe_free (host);
563	twoaday	200	if (fd != 0) {
564	twoaday	181	closesocket (fd);
565	twoaday	200	fd = 0;
566			}
567	twoaday	181	}
568
569
570	twoaday	200	/* Read @buflen bytes from the http stream into the buffer @buf. */
571	twoaday	181	int
572			wHTTP::read (void *buf, unsigned int buflen)
573			{
574			int n;
575
576			if (this->fd == 0 \|\| this->resp_headers == NULL)
577			return -1;
578			if (method != HTTP_GET)
579			return -1;
580
581			if (nleft == -1)
582			nleft = getContentLength ();
583			if ((int)buflen > nleft)
584			buflen = nleft;
585			if (nleft == 0)
586			return -1;
587
588			n = recv (fd, (char*)buf, (int)buflen, 0);
589			if (n > 0) {
590			nleft -= n;
591			if (nleft < 0) nleft = 0;
592			}
593			return n;
594			}
595
596
597	twoaday	200	/* Write the buffer @buf to the http stream. */
598	twoaday	181	int
599			wHTTP::write (const void *buf, unsigned buflen)
600			{
601			if (this->fd == 0)
602			return -1;
603			if (method == HTTP_GET \|\| method == HTTP_HEAD)
604			return -1;
605			return send (fd, (const char*)buf, (int)buflen, 0);
606			}
607	twoaday	200
608
609	twoaday	260	/* Return the Winsock specific error code. */
610	twoaday	200	int wHTTP::getErrorCode (void)
611			{
612			return error;
613			}