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"

#define free_if_malloc(buf) if ((buf)) { free ((buf)); (buf) = NULL; }

/* 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;
}


/* Perform a HTTP 'HEAD' request. */
int
wHTTP::head (const char *_url)
{
    free_if_malloc (host);
    free_if_malloc (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)
{
    free_if_malloc (host);
    free_if_alloc (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)
            return WPTERR_WINSOCK_CONNECT;
        memcpy (&srv.sin_addr, hp->h_addr, hp->h_length);
    }
    else {
        addr = inet_addr (_host);
        if (addr == INADDR_NONE)
            return WPTERR_WINSOCK_CONNECT;
        memcpy (&srv.sin_addr, &addr, sizeof addr);
    }
            
    fd = socket (AF_INET, SOCK_STREAM, 0);
    if (fd < 0)
        return WPTERR_WINSOCK_SOCKET;

    if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, 
                    (const char*)&i, sizeof i)) {
        closesocket (fd);
        fd = 0;
        return WPTERR_WINSOCK_SOCKET;
    }
    
    if (::connect (fd, (struct sockaddr *)&srv, sizeof srv)) {
        closesocket (fd);
        fd = 0;
        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)
            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, 512);
    
    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) {
        free_if_malloc (*_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)+1);
    sprintf (p, fmt, name, val);
    addHeader (&req_headers, p);
    free_if_malloc (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";
    p = (char*)calloc (1, strlen (id[method]) + strlen (h_head)
                          + strlen (url) + n + 2 + 1 + 4);
    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");
    printf ("p='%s'\n", p);
    n = send (fd, p, strlen (p), 0);
    free_if_malloc (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)
                return SOCKET_ERROR;
            if (n == 0)
                break;
            nlen -= n;
            fwrite (buf, 1, n, out);
        } while (nlen > 0);
        return 0;
    }

    do {
        rc = readLine (buf, 1024, 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;
    }
    free_if_malloc (url);
    free_if_malloc (host);
    if (fd != 0)
        closesocket (fd);
}


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;
}


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);
}
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			#define free_if_malloc(buf) if ((buf)) { free ((buf)); (buf) = NULL; }
37
38			/* Empty constructur to allow advanced requests. */
39			wHTTP::wHTTP (void)
40			{
41			reset ();
42			}
43
44
45			/* Constructur to allow alternative syntax. */
46			wHTTP::wHTTP (const char _host, int _port, const char _url)
47			{
48			reset ();
49			this->host = strdup (_host);
50			this->port = _port;
51			this->url = strdup (_url);
52			if (!sendRequest (_host, _port, _url))
53			parseResponse (&statcode);
54
55			}
56
57
58			/* Standard constructur. */
59			wHTTP::wHTTP (const char *_url)
60			{
61			reset ();
62			extractHostInfo (_url, &this->host, &this->url);
63			/* XXX: if the connection fails, return the error code to the user. */
64			if (!sendRequest (this->host, this->port, this->url))
65			parseResponse (&statcode);
66			}
67
68
69			/* Reset object contents for first use. */
70			void
71			wHTTP::reset (void)
72			{
73			ver = 1;
74			port = 80;
75			host = url = NULL;
76			req_headers = resp_headers = NULL;
77			fd = statcode = 0;
78			method = HTTP_GET;
79			nleft = -1;
80			}
81
82
83			/* Perform a HTTP 'HEAD' request. */
84			int
85			wHTTP::head (const char *_url)
86			{
87			free_if_malloc (host);
88			free_if_malloc (url);
89
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			free_if_malloc (host);
105			free_if_alloc (url);
106
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			if (!hp)
203			return WPTERR_WINSOCK_CONNECT;
204			memcpy (&srv.sin_addr, hp->h_addr, hp->h_length);
205			}
206			else {
207			addr = inet_addr (_host);
208			if (addr == INADDR_NONE)
209			return WPTERR_WINSOCK_CONNECT;
210			memcpy (&srv.sin_addr, &addr, sizeof addr);
211			}
212
213			fd = socket (AF_INET, SOCK_STREAM, 0);
214			if (fd < 0)
215			return WPTERR_WINSOCK_SOCKET;
216
217			if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
218			(const char*)&i, sizeof i)) {
219			closesocket (fd);
220			fd = 0;
221			return WPTERR_WINSOCK_SOCKET;
222			}
223
224			if (::connect (fd, (struct sockaddr *)&srv, sizeof srv)) {
225			closesocket (fd);
226			fd = 0;
227			return WPTERR_WINSOCK_CONNECT;
228			}
229
230			return 0;
231			}
232
233
234			int
235			wHTTP::isDataAvailable (int _fd)
236			{
237			struct timeval tv;
238			fd_set inp;
239			int n;
240
241			FD_ZERO (&inp);
242			FD_SET (_fd, &inp);
243			tv.tv_sec = 1;
244			tv.tv_usec = 0;
245
246			n = select (_fd+1, &inp, NULL, NULL, &tv);
247			if (n && FD_ISSET (_fd, &inp))
248			return n;
249			return 0;
250			}
251
252
253			int
254			wHTTP::readLine (char *buf, unsigned int nbuf,
255			int nonblock, int nn, int eof)
256			{
257			char c;
258			int n, i;
259
260			if (nn)
261			*nn = 0;
262			if (eof)
263			*eof = 0;
264			i = 0;
265			do {
266			if (nonblock == 1 && isDataAvailable (fd) == 0) {
267			buf[i++] = '\0';
268			i = -1;
269			break;
270			}
271			n = recv (fd, &c, 1, 0);
272			if (n == -1)
273			break;
274			if (n == 0 \|\| nbuf == 0 \|\| c == '\n') {
275			if (n == 0) {
276			if (eof)
277			*eof = 1;
278			buf[i++] = '\0';
279			}
280			else {
281			buf[i++] = c;
282			buf[i] = '\0';
283			}
284			break;
285			}
286			else {
287			buf[i++] = c;
288			nbuf--;
289			}
290			} while (n > 0 && i != -1);
291
292			if (nn)
293			*nn = i;
294			return 0;
295			}
296
297
298
299			/* Extract the host from the given url @url. Return the host in
300			@host and also return the resource part of the url in @new_url. */
301			int
302			wHTTP::extractHostInfo (const char _url, char _host, char *new_url)
303			{
304			char *p;
305			char tmpbuf[512];
306
307			*_host = NULL;
308			*new_url = NULL;
309
310			/* XXX: do not use static buffers. */
311			memset (tmpbuf, 0, sizeof (tmpbuf));
312			strncpy (tmpbuf, _url, 512);
313
314			p = "http://";
315			if (strlen (_url) < 10 \|\| strncmp (_url, p, 7))
316			return WPTERR_GENERAL;
317			_url += strlen (p);
318			p = strtok (tmpbuf+7, "/");
319			if (!p)
320			return WPTERR_GENERAL;
321			*_host = strdup (p);
322			p = strchr (_url, '/');
323			if (!p) {
324			free_if_malloc (*_host);
325			return WPTERR_GENERAL;
326			}
327			*new_url = strdup (p);
328			return 0;
329			}
330
331
332			/* Add a request header. */
333			int
334			wHTTP::addRequestHeader (const char name, const char val)
335			{
336			char *p;
337			char *fmt = "%s: %s";
338
339			p = (char*) malloc (strlen (name)+strlen (val)+strlen (fmt)+1);
340			sprintf (p, fmt, name, val);
341			addHeader (&req_headers, p);
342			free_if_malloc (p);
343
344			return 0;
345			}
346
347
348			void
349			wHTTP::setVersion (int _ver)
350			{
351			if (_ver > 9)
352			_ver = 0;
353			this->ver = _ver;
354			}
355
356
357			int
358			wHTTP::addRequestHeader (const char *name, unsigned int val)
359			{
360			char buf[32];
361
362			sprintf (buf, "%lu", (DWORD)val);
363			return addRequestHeader (name, buf);
364			}
365
366
367			/* Prepare the request resource @url and send
368			it to host @host (port @port). */
369			int
370			wHTTP::sendRequest (const char _host, int _port, const char _url)
371			{
372			const char *id[] = {"GET", "HEAD", "PUT", "POST"};
373			http_head_t h;
374			const char *h_head;
375			char *p;
376			int n;
377			int rc;
378
379			if (!this->fd) {
380			rc = connect (_host, _port);
381			if (rc)
382			return rc;
383			}
384
385			if (*_url == '/')
386			url++;
387			if (_url == NULL)
388			_url = "";
389
390			addRequestHeader ("Host", _host);
391			if (ver < 1)
392			addRequestHeader ("Connection", "close");
393
394			n = 0;
395			for (h = req_headers; h; h = h->next)
396			n += strlen (h->d) + 2 + 1;
397
398			h_head = "%s /%s HTTP/1.%d\r\n";
399			p = (char*)calloc (1, strlen (id[method]) + strlen (h_head)
400			+ strlen (url) + n + 2 + 1 + 4);
401			if (!p)
402			BUG (0);
403			sprintf (p, h_head, id[method], url, ver);
404			for (h = req_headers; h; h = h->next) {
405			strcat (p, h->d);
406			strcat (p, "\r\n");
407			}
408			strcat (p, "\r\n");
409			printf ("p='%s'\n", p);
410			n = send (fd, p, strlen (p), 0);
411			free_if_malloc (p);
412			return n > 0? 0 : WPTERR_GENERAL;
413			}
414
415
416			/* Parse all response resp_headers. */
417			int
418			wHTTP::parseHeaders (http_head_t *r_head)
419			{
420			char buf[300];
421			int nn;
422			int rc;
423
424			if (!r_head)
425			return WPTERR_GENERAL;
426
427			do {
428			rc = readLine (buf, 299, 1, &nn, NULL);
429			if (rc)
430			return rc;
431			if (nn == 2)
432			break; /* reach empty line */
433			addHeader (r_head, buf);
434			} while (rc == 0);
435			return 0;
436			}
437
438
439			/* Read data from the response and write it to @out. */
440			int
441			wHTTP::readData (FILE *out)
442			{
443			const char *val;
444			char buf[1024+1];
445			int nlen = 0, nn = 0, n, eof=0;
446			int rc = 0;
447
448			if (this->fd == 0 \|\| this->resp_headers == NULL)
449			return -1;
450
451			nlen = getContentLength ();
452			if (nlen == 0) {
453			if (!findHeader (resp_headers, "Connection", &val) \|\|
454			strnicmp (val, "close", 4))
455			return WPTERR_GENERAL;
456			}
457
458			val = getContentType ();
459			if (!val)
460			return WPTERR_GENERAL;
461			if (strnicmp (val, "text", 4)) { /* binary */
462			do {
463			n = recv (fd, buf, nlen > 1024? 1024 : nlen, 0);
464			if (n == -1)
465			return SOCKET_ERROR;
466			if (n == 0)
467			break;
468			nlen -= n;
469			fwrite (buf, 1, n, out);
470			} while (nlen > 0);
471			return 0;
472			}
473
474			do {
475			rc = readLine (buf, 1024, 1, &n, &eof);
476			if (rc)
477			return rc;
478			if (n > 0)
479			fwrite (buf, 1, n, out);
480			if (nlen > 0) {
481			nn += n;
482			if (nlen == nn)
483			break;
484			}
485			} while (eof == 0);
486
487			return 0;
488			}
489
490
491			/* Parse the HTTP response line. */
492			int
493			wHTTP::parseResponse (int *_statcode)
494			{
495			http_head_t n;
496			const char tmp, p;
497			char buf[300];
498			int code = 0, nn = 0;
499			int rc;
500
501			*_statcode = 0;
502			rc = readLine (buf, 299, 1, &nn, NULL);
503			if (rc)
504			return rc;
505
506			tmp = "HTTP/1.";
507			if (strlen (buf) < 8 \|\| strncmp (buf, tmp, strlen (tmp)))
508			return WPTERR_GENERAL;
509			p = buf;
510			p += strlen (tmp)+1 + 1; /* skip HTTP/1.x and WS */
511			*_statcode = atoi (p);
512			if (tmp == 0)
513			return WPTERR_GENERAL;
514			p += 3 + 1; /* number + WS */
515
516			if (code == HTTP_STAT_400 \|\|
517			code == HTTP_STAT_403 \|\|
518			code == HTTP_STAT_404 \|\|
519			code == HTTP_STAT_405)
520			return WPTERR_GENERAL;
521
522			while (resp_headers) {
523			n = resp_headers->next;
524			free (resp_headers);
525			resp_headers = n;
526			}
527			resp_headers = NULL;
528			rc = parseHeaders (&resp_headers);
529			if (rc)
530			return rc;
531			return 0;
532			}
533
534
535			/* Destroy HTTP object. */
536			wHTTP::~wHTTP (void)
537			{
538
539			http_head_t h;
540
541			while (resp_headers) {
542			h = resp_headers->next;
543			free (resp_headers);
544			resp_headers = h;
545			}
546			while (req_headers) {
547			h = req_headers->next;
548			free (req_headers);
549			req_headers = h;
550			}
551			free_if_malloc (url);
552			free_if_malloc (host);
553			if (fd != 0)
554			closesocket (fd);
555			}
556
557
558			int
559			wHTTP::read (void *buf, unsigned int buflen)
560			{
561			int n;
562
563			if (this->fd == 0 \|\| this->resp_headers == NULL)
564			return -1;
565			if (method != HTTP_GET)
566			return -1;
567
568			if (nleft == -1)
569			nleft = getContentLength ();
570			if ((int)buflen > nleft)
571			buflen = nleft;
572			if (nleft == 0)
573			return -1;
574
575			n = recv (fd, (char*)buf, (int)buflen, 0);
576			if (n > 0) {
577			nleft -= n;
578			if (nleft < 0) nleft = 0;
579			}
580			return n;
581			}
582
583
584			int
585			wHTTP::write (const void *buf, unsigned buflen)
586			{
587			if (this->fd == 0)
588			return -1;
589			if (method == HTTP_GET \|\| method == HTTP_HEAD)
590			return -1;
591			return send (fd, (const char*)buf, (int)buflen, 0);
592			}