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	/* wptHTTP.cpp - Generic HTTP support
2	* Copyright (C) 2004, 2005, 2006, 2007 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	#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	open (_url);
58	}
59
60
61	/* Open a connection to the given URL. */
62	int
63	wHTTP::open (const char *_url)
64	{
65	releaseMem ();
66
67	if (extractHostInfo (_url, &this->host, &this->url))
68	return -1;
69
70	if (!sendRequest (this->host, this->port, this->url))
71	return parseResponse (&statcode);
72
73	return 0;
74	}
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	error = 0;
89	}
90
91
92	/* Perform a HTTP 'HEAD' request. */
93	int
94	wHTTP::head (const char *_url)
95	{
96	int err;
97
98	safe_free (host);
99	safe_free (url);
100
101	err = extractHostInfo (_url, &this->host, &this->url);
102	if (err)
103	return err;
104	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	int err;
118
119	safe_free (host);
120	safe_free (url);
121
122	err = extractHostInfo (_url, &this->host, &this->url);
123	if (err)
124	return err;
125
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	if (!hp) {
220	this->error = (int)WSAGetLastError ();
221	return WPTERR_WINSOCK_CONNECT;
222	}
223	memcpy (&srv.sin_addr, hp->h_addr, hp->h_length);
224	}
225	else {
226	addr = inet_addr (_host);
227	if (addr == INADDR_NONE) {
228	this->error = (int)WSAGetLastError ();
229	return WPTERR_WINSOCK_CONNECT;
230	}
231	memcpy (&srv.sin_addr, &addr, sizeof addr);
232	}
233
234	fd = socket (AF_INET, SOCK_STREAM, 0);
235	if (fd < 0) {
236	this->error = (int)WSAGetLastError ();
237	return WPTERR_WINSOCK_SOCKET;
238	}
239
240	if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
241	(const char*)&i, sizeof i)) {
242	closesocket (fd);
243	fd = 0;
244	this->error = (int)WSAGetLastError ();
245	return WPTERR_WINSOCK_SOCKET;
246	}
247
248	if (::connect (fd, (struct sockaddr *)&srv, sizeof srv)) {
249	closesocket (fd);
250	fd = 0;
251	this->error = (int)WSAGetLastError ();
252	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	if (n == -1) {
298	this->error = (int)WSAGetLastError ();
299	break;
300	}
301	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	{
331	char tmpbuf[2*MAX_PATH+1];
332	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	strncpy (tmpbuf, _url, DIM (tmpbuf)-1);
340
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	*_host = strdup (p);
349	p = strchr (_url, '/');
350	if (!p) /* document were given so we assume the root '/'. */
351	*new_url = strdup ("/");
352	else
353	*new_url = strdup (p);
354	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	p = (char*) malloc (strlen (name)+strlen (val)+strlen (fmt)+4);
366	sprintf (p, fmt, name, val);
367	addHeader (&req_headers, p);
368	safe_free (p);
369
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	_url++;
413	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	n += strlen (id[method]) + strlen (h_head)
425	+ strlen (_url) + n + 2 + 1 + 4;
426	p = (char*)calloc (1, n+1);
427	if (!p)
428	BUG (0);
429	sprintf (p, h_head, id[method], _url, ver);
430	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	safe_free (p);
437	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	rc = readLine (buf, DIM (buf)-1, 1, &nn, NULL);
454	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	if (n == -1) {
490	this->error = (int)WSAGetLastError ();
491	return SOCKET_ERROR;
492	}
493	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	rc = readLine (buf, DIM (buf)-1, 1, &n, &eof);
503	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	/* Release all used structures. */
563	void
564	wHTTP::releaseMem (void)
565	{
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	resp_headers = NULL;
574	while (req_headers) {
575	h = req_headers->next;
576	free (req_headers);
577	req_headers = h;
578	}
579	req_headers = NULL;
580	safe_free (url);
581	safe_free (host);
582	}
583
584
585	/* Destroy HTTP object. */
586	wHTTP::~wHTTP (void)
587	{
588	releaseMem ();
589	if (fd != 0) {
590	closesocket (fd);
591	fd = 0;
592	}
593	}
594
595
596	/* Read @buflen bytes from the http stream into the buffer @buf. */
597	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	/* Write the buffer @buf to the http stream. */
624	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
634
635	/* Return the Winsock specific error code. */
636	int wHTTP::getErrorCode (void)
637	{
638	return error;
639	}