trunk/Src/wptHTTP.cpp

/* wptHTTP.cpp - Generic HTTP support
 *      Copyright (C) 2004, 2005, 2006, 2007 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.
 */
#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 ();
    open (_url);
}


/* Open a connection to the given URL. */
int
wHTTP::open (const char *_url)
{
    releaseMem ();
    
    if (extractHostInfo (_url, &this->host, &this->url))
        return -1;
    
    if (!sendRequest (this->host, this->port, this->url))
        return parseResponse (&statcode);
    
    return 0;
}


/* 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)
{
    int err;

    safe_free (host);
    safe_free (url);

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

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

    return 0;
}


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

    safe_free (host);
    safe_free (url);

    err = extractHostInfo (_url, &this->host, &this->url);
    if (err)
        return err;

    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 tmpbuf[2*MAX_PATH+1];
    char *p;

    *_host = NULL;
    *new_url = NULL;

    /* XXX: do not use static buffers. */
    memset (tmpbuf, 0, sizeof (tmpbuf));
    strncpy (tmpbuf, _url, DIM (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) /* document were given so we assume the root '/'. */
        *new_url = strdup ("/");
    else
        *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, DIM (buf)-1, 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, DIM (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;
}


/* Release all used structures. */
void
wHTTP::releaseMem (void)
{
    http_head_t h;
    
    while (resp_headers) {
        h = resp_headers->next;
        free (resp_headers);
        resp_headers = h;
    }
    resp_headers = NULL;
    while (req_headers) {
        h = req_headers->next;
        free (req_headers);
        req_headers = h;
    }
    req_headers = NULL;
    safe_free (url);
    safe_free (host);
}


/* Destroy HTTP object. */
wHTTP::~wHTTP (void)
{
    releaseMem ();
    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	twoaday	308	* Copyright (C) 2004, 2005, 2006, 2007 Timo Schulz
3	twoaday	181	*
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			#ifdef HAVE_CONFIG_H
17			#include <config.h>
18			#endif
19
20			#include <stdio.h>
21			#include <stdio.h>
22			#include <stdlib.h>
23			#include <string.h>
24			#include <windows.h>
25			#include <ctype.h>
26			#include <errno.h>
27
28			#include "wptHTTP.h"
29			#include "wptTypes.h"
30			#include "wptErrors.h"
31
32
33			/* Empty constructur to allow advanced requests. */
34			wHTTP::wHTTP (void)
35			{
36			reset ();
37			}
38
39
40			/* Constructur to allow alternative syntax. */
41			wHTTP::wHTTP (const char _host, int _port, const char _url)
42			{
43			reset ();
44			this->host = strdup (_host);
45			this->port = _port;
46			this->url = strdup (_url);
47			if (!sendRequest (_host, _port, _url))
48			parseResponse (&statcode);
49
50			}
51
52
53			/* Standard constructur. */
54			wHTTP::wHTTP (const char *_url)
55			{
56			reset ();
57	twoaday	308	open (_url);
58			}
59	twoaday	262
60	twoaday	308
61			/* Open a connection to the given URL. */
62			int
63			wHTTP::open (const char *_url)
64			{
65			releaseMem ();
66
67	twoaday	262	if (extractHostInfo (_url, &this->host, &this->url))
68	twoaday	308	return -1;
69
70	twoaday	181	if (!sendRequest (this->host, this->port, this->url))
71	twoaday	308	return parseResponse (&statcode);
72
73			return 0;
74	twoaday	181	}
75
76
77			/* Reset object contents for first use. */
78			void
79			wHTTP::reset (void)
80			{
81			ver = 1;
82			port = 80;
83			host = url = NULL;
84			req_headers = resp_headers = NULL;
85			fd = statcode = 0;
86			method = HTTP_GET;
87			nleft = -1;
88	twoaday	200	error = 0;
89	twoaday	181	}
90
91
92			/* Perform a HTTP 'HEAD' request. */
93			int
94			wHTTP::head (const char *_url)
95			{
96	twoaday	262	int err;
97
98	twoaday	260	safe_free (host);
99			safe_free (url);
100	twoaday	181
101	twoaday	262	err = extractHostInfo (_url, &this->host, &this->url);
102			if (err)
103			return err;
104	twoaday	181	method = HTTP_HEAD;
105
106			if (!sendRequest (host, port, url))
107			parseResponse (&statcode);
108
109			return 0;
110			}
111
112
113			/* Perform a HTTP 'GET' request. */
114			int
115			wHTTP::get (const char *_url)
116			{
117	twoaday	262	int err;
118
119	twoaday	260	safe_free (host);
120			safe_free (url);
121	twoaday	181
122	twoaday	262	err = extractHostInfo (_url, &this->host, &this->url);
123			if (err)
124			return err;
125	twoaday	181
126			method = HTTP_GET;
127			if (!sendRequest (this->host, this->port, this->url))
128			parseResponse (&statcode);
129
130			return 0;
131			}
132
133
134			/* Return HTTP status code. */
135			int
136			wHTTP::getStatusCode (void)
137			{
138			return statcode;
139			}
140
141
142			/* Return MIME content type. */
143			const char*
144			wHTTP::getContentType (void)
145			{
146			const char *type = NULL;
147
148			findHeader (resp_headers, "Content-Type", &type);
149			return type;
150			}
151
152
153			/* Return content length. */
154			unsigned int
155			wHTTP::getContentLength (void)
156			{
157			const char *len = NULL;
158
159			if (findHeader (resp_headers, "Content-Length", &len))
160			return strtoul (len, NULL, 10);
161			return 0;
162			}
163
164
165			void
166			wHTTP::addHeader (http_head_t root, const char val)
167			{
168			http_head_t n, t;
169
170			t = (http_head_t)calloc (1, sizeof *t+strlen (val)+2);
171			if (!t)
172			BUG (0);
173			strcpy (t->d, val);
174
175			if (!*root)
176			*root = t;
177			else {
178			for (n = *root; n->next; n=n->next)
179			;
180			n->next = t;
181			}
182			}
183
184
185			bool
186			wHTTP::findHeader (http_head_t root,
187			const char name, const char *val)
188			{
189			http_head_t n;
190			char *p;
191
192			*val = NULL;
193			for (n = root; n; n = n->next) {
194			if (strlen (n->d) >= strlen (name) &&
195			strstr (n->d, name)) {
196			p = strchr (n->d, ':');
197			*val = p? n->d + (p - n->d + 1 + 1) : NULL;
198			return true;
199			}
200			}
201			return false;
202			}
203
204
205			int
206			wHTTP::connect (const char *_host, int _port)
207			{
208			struct hostent *hp;
209			struct sockaddr_in srv;
210			unsigned long addr = 0;
211			int i = 1;
212
213			memset (&srv, 0, sizeof srv);
214			srv.sin_port = htons ((unsigned short)_port);
215			srv.sin_family = AF_INET;
216
217			if (isalpha (*_host)) {
218			hp = gethostbyname (_host);
219	twoaday	200	if (!hp) {
220			this->error = (int)WSAGetLastError ();
221	twoaday	181	return WPTERR_WINSOCK_CONNECT;
222	twoaday	200	}
223	twoaday	181	memcpy (&srv.sin_addr, hp->h_addr, hp->h_length);
224			}
225			else {
226			addr = inet_addr (_host);
227	twoaday	200	if (addr == INADDR_NONE) {
228			this->error = (int)WSAGetLastError ();
229	twoaday	181	return WPTERR_WINSOCK_CONNECT;
230	twoaday	200	}
231	twoaday	181	memcpy (&srv.sin_addr, &addr, sizeof addr);
232			}
233
234			fd = socket (AF_INET, SOCK_STREAM, 0);
235	twoaday	200	if (fd < 0) {
236			this->error = (int)WSAGetLastError ();
237	twoaday	181	return WPTERR_WINSOCK_SOCKET;
238	twoaday	200	}
239	twoaday	181
240			if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
241			(const char*)&i, sizeof i)) {
242			closesocket (fd);
243			fd = 0;
244	twoaday	200	this->error = (int)WSAGetLastError ();
245	twoaday	181	return WPTERR_WINSOCK_SOCKET;
246			}
247
248			if (::connect (fd, (struct sockaddr *)&srv, sizeof srv)) {
249			closesocket (fd);
250			fd = 0;
251	twoaday	200	this->error = (int)WSAGetLastError ();
252	twoaday	181	return WPTERR_WINSOCK_CONNECT;
253			}
254
255			return 0;
256			}
257
258
259			int
260			wHTTP::isDataAvailable (int _fd)
261			{
262			struct timeval tv;
263			fd_set inp;
264			int n;
265
266			FD_ZERO (&inp);
267			FD_SET (_fd, &inp);
268			tv.tv_sec = 1;
269			tv.tv_usec = 0;
270
271			n = select (_fd+1, &inp, NULL, NULL, &tv);
272			if (n && FD_ISSET (_fd, &inp))
273			return n;
274			return 0;
275			}
276
277
278			int
279			wHTTP::readLine (char *buf, unsigned int nbuf,
280			int nonblock, int nn, int eof)
281			{
282			char c;
283			int n, i;
284
285			if (nn)
286			*nn = 0;
287			if (eof)
288			*eof = 0;
289			i = 0;
290			do {
291			if (nonblock == 1 && isDataAvailable (fd) == 0) {
292			buf[i++] = '\0';
293			i = -1;
294			break;
295			}
296			n = recv (fd, &c, 1, 0);
297	twoaday	260	if (n == -1) {
298			this->error = (int)WSAGetLastError ();
299	twoaday	181	break;
300	twoaday	260	}
301	twoaday	181	if (n == 0 \|\| nbuf == 0 \|\| c == '\n') {
302			if (n == 0) {
303			if (eof)
304			*eof = 1;
305			buf[i++] = '\0';
306			}
307			else {
308			buf[i++] = c;
309			buf[i] = '\0';
310			}
311			break;
312			}
313			else {
314			buf[i++] = c;
315			nbuf--;
316			}
317			} while (n > 0 && i != -1);
318
319			if (nn)
320			*nn = i;
321			return 0;
322			}
323
324
325
326			/* Extract the host from the given url @url. Return the host in
327			@host and also return the resource part of the url in @new_url. */
328			int
329			wHTTP::extractHostInfo (const char _url, char _host, char *new_url)
330	twoaday	262	{
331			char tmpbuf[2*MAX_PATH+1];
332	twoaday	181	char *p;
333
334			*_host = NULL;
335			*new_url = NULL;
336
337			/* XXX: do not use static buffers. */
338			memset (tmpbuf, 0, sizeof (tmpbuf));
339	twoaday	271	strncpy (tmpbuf, _url, DIM (tmpbuf)-1);
340	twoaday	181
341			p = "http://";
342			if (strlen (_url) < 10 \|\| strncmp (_url, p, 7))
343			return WPTERR_GENERAL;
344			_url += strlen (p);
345			p = strtok (tmpbuf+7, "/");
346			if (!p)
347			return WPTERR_GENERAL;
348	twoaday	262	*_host = strdup (p);
349	twoaday	181	p = strchr (_url, '/');
350	twoaday	262	if (!p) /* document were given so we assume the root '/'. */
351			*new_url = strdup ("/");
352			else
353			*new_url = strdup (p);
354	twoaday	181	return 0;
355			}
356
357
358			/* Add a request header. */
359			int
360			wHTTP::addRequestHeader (const char name, const char val)
361			{
362			char *p;
363			char *fmt = "%s: %s";
364
365	twoaday	214	p = (char*) malloc (strlen (name)+strlen (val)+strlen (fmt)+4);
366	twoaday	181	sprintf (p, fmt, name, val);
367			addHeader (&req_headers, p);
368	twoaday	260	safe_free (p);
369	twoaday	181
370			return 0;
371			}
372
373
374			void
375			wHTTP::setVersion (int _ver)
376			{
377			if (_ver > 9)
378			_ver = 0;
379			this->ver = _ver;
380			}
381
382
383			int
384			wHTTP::addRequestHeader (const char *name, unsigned int val)
385			{
386			char buf[32];
387
388			sprintf (buf, "%lu", (DWORD)val);
389			return addRequestHeader (name, buf);
390			}
391
392
393			/* Prepare the request resource @url and send
394			it to host @host (port @port). */
395			int
396			wHTTP::sendRequest (const char _host, int _port, const char _url)
397			{
398			const char *id[] = {"GET", "HEAD", "PUT", "POST"};
399			http_head_t h;
400			const char *h_head;
401			char *p;
402			int n;
403			int rc;
404
405			if (!this->fd) {
406			rc = connect (_host, _port);
407			if (rc)
408			return rc;
409			}
410
411			if (*_url == '/')
412	twoaday	214	_url++;
413	twoaday	181	if (_url == NULL)
414			_url = "";
415
416			addRequestHeader ("Host", _host);
417			if (ver < 1)
418			addRequestHeader ("Connection", "close");
419
420			n = 0;
421			for (h = req_headers; h; h = h->next)
422			n += strlen (h->d) + 2 + 1;
423			h_head = "%s /%s HTTP/1.%d\r\n";
424	twoaday	214	n += strlen (id[method]) + strlen (h_head)
425			+ strlen (_url) + n + 2 + 1 + 4;
426			p = (char*)calloc (1, n+1);
427	twoaday	181	if (!p)
428			BUG (0);
429	twoaday	214	sprintf (p, h_head, id[method], _url, ver);
430	twoaday	181	for (h = req_headers; h; h = h->next) {
431			strcat (p, h->d);
432			strcat (p, "\r\n");
433			}
434			strcat (p, "\r\n");
435			n = send (fd, p, strlen (p), 0);
436	twoaday	260	safe_free (p);
437	twoaday	181	return n > 0? 0 : WPTERR_GENERAL;
438			}
439
440
441			/* Parse all response resp_headers. */
442			int
443			wHTTP::parseHeaders (http_head_t *r_head)
444			{
445			char buf[300];
446			int nn;
447			int rc;
448
449			if (!r_head)
450			return WPTERR_GENERAL;
451
452			do {
453	twoaday	262	rc = readLine (buf, DIM (buf)-1, 1, &nn, NULL);
454	twoaday	181	if (rc)
455			return rc;
456			if (nn == 2)
457			break; /* reach empty line */
458			addHeader (r_head, buf);
459			} while (rc == 0);
460			return 0;
461			}
462
463
464			/* Read data from the response and write it to @out. */
465			int
466			wHTTP::readData (FILE *out)
467			{
468			const char *val;
469			char buf[1024+1];
470			int nlen = 0, nn = 0, n, eof=0;
471			int rc = 0;
472
473			if (this->fd == 0 \|\| this->resp_headers == NULL)
474			return -1;
475
476			nlen = getContentLength ();
477			if (nlen == 0) {
478			if (!findHeader (resp_headers, "Connection", &val) \|\|
479			strnicmp (val, "close", 4))
480			return WPTERR_GENERAL;
481			}
482
483			val = getContentType ();
484			if (!val)
485			return WPTERR_GENERAL;
486			if (strnicmp (val, "text", 4)) { /* binary */
487			do {
488			n = recv (fd, buf, nlen > 1024? 1024 : nlen, 0);
489	twoaday	260	if (n == -1) {
490			this->error = (int)WSAGetLastError ();
491	twoaday	181	return SOCKET_ERROR;
492	twoaday	260	}
493	twoaday	181	if (n == 0)
494			break;
495			nlen -= n;
496			fwrite (buf, 1, n, out);
497			} while (nlen > 0);
498			return 0;
499			}
500
501			do {
502	twoaday	262	rc = readLine (buf, DIM (buf)-1, 1, &n, &eof);
503	twoaday	181	if (rc)
504			return rc;
505			if (n > 0)
506			fwrite (buf, 1, n, out);
507			if (nlen > 0) {
508			nn += n;
509			if (nlen == nn)
510			break;
511			}
512			} while (eof == 0);
513
514			return 0;
515			}
516
517
518			/* Parse the HTTP response line. */
519			int
520			wHTTP::parseResponse (int *_statcode)
521			{
522			http_head_t n;
523			const char tmp, p;
524			char buf[300];
525			int code = 0, nn = 0;
526			int rc;
527
528			*_statcode = 0;
529			rc = readLine (buf, 299, 1, &nn, NULL);
530			if (rc)
531			return rc;
532
533			tmp = "HTTP/1.";
534			if (strlen (buf) < 8 \|\| strncmp (buf, tmp, strlen (tmp)))
535			return WPTERR_GENERAL;
536			p = buf;
537			p += strlen (tmp)+1 + 1; /* skip HTTP/1.x and WS */
538			*_statcode = atoi (p);
539			if (tmp == 0)
540			return WPTERR_GENERAL;
541			p += 3 + 1; /* number + WS */
542
543			if (code == HTTP_STAT_400 \|\|
544			code == HTTP_STAT_403 \|\|
545			code == HTTP_STAT_404 \|\|
546			code == HTTP_STAT_405)
547			return WPTERR_GENERAL;
548
549			while (resp_headers) {
550			n = resp_headers->next;
551			free (resp_headers);
552			resp_headers = n;
553			}
554			resp_headers = NULL;
555			rc = parseHeaders (&resp_headers);
556			if (rc)
557			return rc;
558			return 0;
559			}
560
561
562	twoaday	308	/* Release all used structures. */
563			void
564			wHTTP::releaseMem (void)
565	twoaday	181	{
566			http_head_t h;
567
568			while (resp_headers) {
569			h = resp_headers->next;
570			free (resp_headers);
571			resp_headers = h;
572			}
573	twoaday	308	resp_headers = NULL;
574	twoaday	181	while (req_headers) {
575			h = req_headers->next;
576			free (req_headers);
577			req_headers = h;
578			}
579	twoaday	308	req_headers = NULL;
580	twoaday	260	safe_free (url);
581			safe_free (host);
582	twoaday	308	}
583
584
585			/* Destroy HTTP object. */
586			wHTTP::~wHTTP (void)
587			{
588			releaseMem ();
589	twoaday	200	if (fd != 0) {
590	twoaday	181	closesocket (fd);
591	twoaday	200	fd = 0;
592			}
593	twoaday	181	}
594
595
596	twoaday	200	/* Read @buflen bytes from the http stream into the buffer @buf. */
597	twoaday	181	int
598			wHTTP::read (void *buf, unsigned int buflen)
599			{
600			int n;
601
602			if (this->fd == 0 \|\| this->resp_headers == NULL)
603			return -1;
604			if (method != HTTP_GET)
605			return -1;
606
607			if (nleft == -1)
608			nleft = getContentLength ();
609			if ((int)buflen > nleft)
610			buflen = nleft;
611			if (nleft == 0)
612			return -1;
613
614			n = recv (fd, (char*)buf, (int)buflen, 0);
615			if (n > 0) {
616			nleft -= n;
617			if (nleft < 0) nleft = 0;
618			}
619			return n;
620			}
621
622
623	twoaday	200	/* Write the buffer @buf to the http stream. */
624	twoaday	181	int
625			wHTTP::write (const void *buf, unsigned buflen)
626			{
627			if (this->fd == 0)
628			return -1;
629			if (method == HTTP_GET \|\| method == HTTP_HEAD)
630			return -1;
631			return send (fd, (const char*)buf, (int)buflen, 0);
632			}
633	twoaday	200
634
635	twoaday	260	/* Return the Winsock specific error code. */
636	twoaday	200	int wHTTP::getErrorCode (void)
637			{
638			return error;
639			}