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)
{
    /* In case the function is used more than once, we
       need to release the old structures first. */
    releaseHeaders ();
    
    safe_free (this->host);
    safe_free (this->url);
    
    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 (this->host, this->port, this->url))
        parseResponse (&statcode);

    return 0;
}


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

    safe_free (this->host);
    safe_free (this->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;
    return parseHeaders (&resp_headers);
}


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


/* Destroy HTTP object. */
wHTTP::~wHTTP (void)
{
    releaseHeaders();
    safe_free (host);
    safe_free (url);
    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	twoaday	310	/* In case the function is used more than once, we
66			need to release the old structures first. */
67			releaseHeaders ();
68	twoaday	308
69	twoaday	310	safe_free (this->host);
70			safe_free (this->url);
71
72	twoaday	262	if (extractHostInfo (_url, &this->host, &this->url))
73	twoaday	308	return -1;
74
75	twoaday	181	if (!sendRequest (this->host, this->port, this->url))
76	twoaday	308	return parseResponse (&statcode);
77
78			return 0;
79	twoaday	181	}
80
81
82			/* Reset object contents for first use. */
83			void
84			wHTTP::reset (void)
85			{
86			ver = 1;
87			port = 80;
88			host = url = NULL;
89			req_headers = resp_headers = NULL;
90			fd = statcode = 0;
91			method = HTTP_GET;
92			nleft = -1;
93	twoaday	200	error = 0;
94	twoaday	181	}
95
96
97			/* Perform a HTTP 'HEAD' request. */
98			int
99			wHTTP::head (const char *_url)
100			{
101	twoaday	262	int err;
102
103	twoaday	260	safe_free (host);
104			safe_free (url);
105	twoaday	181
106	twoaday	262	err = extractHostInfo (_url, &this->host, &this->url);
107			if (err)
108			return err;
109	twoaday	310
110	twoaday	181	method = HTTP_HEAD;
111	twoaday	310	if (!sendRequest (this->host, this->port, this->url))
112	twoaday	181	parseResponse (&statcode);
113
114			return 0;
115			}
116
117
118			/* Perform a HTTP 'GET' request. */
119			int
120			wHTTP::get (const char *_url)
121			{
122	twoaday	262	int err;
123
124	twoaday	310	safe_free (this->host);
125			safe_free (this->url);
126	twoaday	181
127	twoaday	262	err = extractHostInfo (_url, &this->host, &this->url);
128			if (err)
129			return err;
130	twoaday	181
131			method = HTTP_GET;
132			if (!sendRequest (this->host, this->port, this->url))
133			parseResponse (&statcode);
134
135			return 0;
136			}
137
138
139			/* Return HTTP status code. */
140			int
141			wHTTP::getStatusCode (void)
142			{
143			return statcode;
144			}
145
146
147			/* Return MIME content type. */
148			const char*
149			wHTTP::getContentType (void)
150			{
151			const char *type = NULL;
152
153			findHeader (resp_headers, "Content-Type", &type);
154			return type;
155			}
156
157
158			/* Return content length. */
159			unsigned int
160			wHTTP::getContentLength (void)
161			{
162			const char *len = NULL;
163
164			if (findHeader (resp_headers, "Content-Length", &len))
165			return strtoul (len, NULL, 10);
166			return 0;
167			}
168
169
170			void
171			wHTTP::addHeader (http_head_t root, const char val)
172			{
173			http_head_t n, t;
174
175			t = (http_head_t)calloc (1, sizeof *t+strlen (val)+2);
176			if (!t)
177			BUG (0);
178			strcpy (t->d, val);
179
180			if (!*root)
181			*root = t;
182			else {
183			for (n = *root; n->next; n=n->next)
184			;
185			n->next = t;
186			}
187			}
188
189
190			bool
191			wHTTP::findHeader (http_head_t root,
192			const char name, const char *val)
193			{
194			http_head_t n;
195			char *p;
196
197			*val = NULL;
198			for (n = root; n; n = n->next) {
199			if (strlen (n->d) >= strlen (name) &&
200			strstr (n->d, name)) {
201			p = strchr (n->d, ':');
202			*val = p? n->d + (p - n->d + 1 + 1) : NULL;
203			return true;
204			}
205			}
206			return false;
207			}
208
209
210			int
211			wHTTP::connect (const char *_host, int _port)
212			{
213			struct hostent *hp;
214			struct sockaddr_in srv;
215			unsigned long addr = 0;
216			int i = 1;
217
218			memset (&srv, 0, sizeof srv);
219			srv.sin_port = htons ((unsigned short)_port);
220			srv.sin_family = AF_INET;
221
222			if (isalpha (*_host)) {
223			hp = gethostbyname (_host);
224	twoaday	200	if (!hp) {
225			this->error = (int)WSAGetLastError ();
226	twoaday	181	return WPTERR_WINSOCK_CONNECT;
227	twoaday	200	}
228	twoaday	181	memcpy (&srv.sin_addr, hp->h_addr, hp->h_length);
229			}
230			else {
231			addr = inet_addr (_host);
232	twoaday	200	if (addr == INADDR_NONE) {
233			this->error = (int)WSAGetLastError ();
234	twoaday	181	return WPTERR_WINSOCK_CONNECT;
235	twoaday	200	}
236	twoaday	181	memcpy (&srv.sin_addr, &addr, sizeof addr);
237			}
238
239			fd = socket (AF_INET, SOCK_STREAM, 0);
240	twoaday	200	if (fd < 0) {
241			this->error = (int)WSAGetLastError ();
242	twoaday	181	return WPTERR_WINSOCK_SOCKET;
243	twoaday	200	}
244	twoaday	181
245			if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
246			(const char*)&i, sizeof i)) {
247			closesocket (fd);
248			fd = 0;
249	twoaday	200	this->error = (int)WSAGetLastError ();
250	twoaday	181	return WPTERR_WINSOCK_SOCKET;
251			}
252
253			if (::connect (fd, (struct sockaddr *)&srv, sizeof srv)) {
254			closesocket (fd);
255			fd = 0;
256	twoaday	200	this->error = (int)WSAGetLastError ();
257	twoaday	181	return WPTERR_WINSOCK_CONNECT;
258			}
259
260			return 0;
261			}
262
263
264			int
265			wHTTP::isDataAvailable (int _fd)
266			{
267			struct timeval tv;
268			fd_set inp;
269			int n;
270
271			FD_ZERO (&inp);
272			FD_SET (_fd, &inp);
273			tv.tv_sec = 1;
274			tv.tv_usec = 0;
275
276			n = select (_fd+1, &inp, NULL, NULL, &tv);
277			if (n && FD_ISSET (_fd, &inp))
278			return n;
279			return 0;
280			}
281
282
283			int
284			wHTTP::readLine (char *buf, unsigned int nbuf,
285			int nonblock, int nn, int eof)
286			{
287			char c;
288			int n, i;
289
290			if (nn)
291			*nn = 0;
292			if (eof)
293			*eof = 0;
294			i = 0;
295			do {
296			if (nonblock == 1 && isDataAvailable (fd) == 0) {
297			buf[i++] = '\0';
298			i = -1;
299			break;
300			}
301			n = recv (fd, &c, 1, 0);
302	twoaday	260	if (n == -1) {
303			this->error = (int)WSAGetLastError ();
304	twoaday	181	break;
305	twoaday	260	}
306	twoaday	181	if (n == 0 \|\| nbuf == 0 \|\| c == '\n') {
307			if (n == 0) {
308			if (eof)
309			*eof = 1;
310			buf[i++] = '\0';
311			}
312			else {
313			buf[i++] = c;
314			buf[i] = '\0';
315			}
316			break;
317			}
318			else {
319			buf[i++] = c;
320			nbuf--;
321			}
322			} while (n > 0 && i != -1);
323
324			if (nn)
325			*nn = i;
326			return 0;
327			}
328
329
330
331			/* Extract the host from the given url @url. Return the host in
332			@host and also return the resource part of the url in @new_url. */
333			int
334			wHTTP::extractHostInfo (const char _url, char _host, char *new_url)
335	twoaday	262	{
336			char tmpbuf[2*MAX_PATH+1];
337	twoaday	181	char *p;
338
339			*_host = NULL;
340			*new_url = NULL;
341
342			/* XXX: do not use static buffers. */
343			memset (tmpbuf, 0, sizeof (tmpbuf));
344	twoaday	271	strncpy (tmpbuf, _url, DIM (tmpbuf)-1);
345	twoaday	181
346			p = "http://";
347			if (strlen (_url) < 10 \|\| strncmp (_url, p, 7))
348			return WPTERR_GENERAL;
349			_url += strlen (p);
350			p = strtok (tmpbuf+7, "/");
351			if (!p)
352			return WPTERR_GENERAL;
353	twoaday	262	*_host = strdup (p);
354	twoaday	181	p = strchr (_url, '/');
355	twoaday	262	if (!p) /* document were given so we assume the root '/'. */
356			*new_url = strdup ("/");
357			else
358			*new_url = strdup (p);
359	twoaday	181	return 0;
360			}
361
362
363			/* Add a request header. */
364			int
365			wHTTP::addRequestHeader (const char name, const char val)
366			{
367			char *p;
368			char *fmt = "%s: %s";
369
370	twoaday	214	p = (char*) malloc (strlen (name)+strlen (val)+strlen (fmt)+4);
371	twoaday	181	sprintf (p, fmt, name, val);
372			addHeader (&req_headers, p);
373	twoaday	260	safe_free (p);
374	twoaday	181
375			return 0;
376			}
377
378
379			void
380			wHTTP::setVersion (int _ver)
381			{
382			if (_ver > 9)
383			_ver = 0;
384			this->ver = _ver;
385			}
386
387
388			int
389			wHTTP::addRequestHeader (const char *name, unsigned int val)
390			{
391			char buf[32];
392
393			sprintf (buf, "%lu", (DWORD)val);
394			return addRequestHeader (name, buf);
395			}
396
397
398			/* Prepare the request resource @url and send
399			it to host @host (port @port). */
400			int
401			wHTTP::sendRequest (const char _host, int _port, const char _url)
402			{
403			const char *id[] = {"GET", "HEAD", "PUT", "POST"};
404			http_head_t h;
405			const char *h_head;
406			char *p;
407			int n;
408			int rc;
409
410			if (!this->fd) {
411			rc = connect (_host, _port);
412			if (rc)
413			return rc;
414			}
415
416			if (*_url == '/')
417	twoaday	214	_url++;
418	twoaday	181	if (_url == NULL)
419			_url = "";
420
421			addRequestHeader ("Host", _host);
422			if (ver < 1)
423			addRequestHeader ("Connection", "close");
424
425			n = 0;
426			for (h = req_headers; h; h = h->next)
427			n += strlen (h->d) + 2 + 1;
428			h_head = "%s /%s HTTP/1.%d\r\n";
429	twoaday	214	n += strlen (id[method]) + strlen (h_head)
430			+ strlen (_url) + n + 2 + 1 + 4;
431			p = (char*)calloc (1, n+1);
432	twoaday	181	if (!p)
433			BUG (0);
434	twoaday	214	sprintf (p, h_head, id[method], _url, ver);
435	twoaday	181	for (h = req_headers; h; h = h->next) {
436			strcat (p, h->d);
437			strcat (p, "\r\n");
438			}
439			strcat (p, "\r\n");
440			n = send (fd, p, strlen (p), 0);
441	twoaday	260	safe_free (p);
442	twoaday	181	return n > 0? 0 : WPTERR_GENERAL;
443			}
444
445
446			/* Parse all response resp_headers. */
447			int
448			wHTTP::parseHeaders (http_head_t *r_head)
449			{
450			char buf[300];
451			int nn;
452			int rc;
453
454			if (!r_head)
455			return WPTERR_GENERAL;
456
457			do {
458	twoaday	262	rc = readLine (buf, DIM (buf)-1, 1, &nn, NULL);
459	twoaday	181	if (rc)
460			return rc;
461			if (nn == 2)
462			break; /* reach empty line */
463			addHeader (r_head, buf);
464			} while (rc == 0);
465			return 0;
466			}
467
468
469			/* Read data from the response and write it to @out. */
470			int
471			wHTTP::readData (FILE *out)
472			{
473			const char *val;
474			char buf[1024+1];
475			int nlen = 0, nn = 0, n, eof=0;
476			int rc = 0;
477
478			if (this->fd == 0 \|\| this->resp_headers == NULL)
479			return -1;
480
481			nlen = getContentLength ();
482			if (nlen == 0) {
483			if (!findHeader (resp_headers, "Connection", &val) \|\|
484			strnicmp (val, "close", 4))
485			return WPTERR_GENERAL;
486			}
487
488			val = getContentType ();
489			if (!val)
490			return WPTERR_GENERAL;
491			if (strnicmp (val, "text", 4)) { /* binary */
492			do {
493			n = recv (fd, buf, nlen > 1024? 1024 : nlen, 0);
494	twoaday	260	if (n == -1) {
495			this->error = (int)WSAGetLastError ();
496	twoaday	181	return SOCKET_ERROR;
497	twoaday	260	}
498	twoaday	181	if (n == 0)
499			break;
500			nlen -= n;
501			fwrite (buf, 1, n, out);
502			} while (nlen > 0);
503			return 0;
504			}
505
506			do {
507	twoaday	262	rc = readLine (buf, DIM (buf)-1, 1, &n, &eof);
508	twoaday	181	if (rc)
509			return rc;
510			if (n > 0)
511			fwrite (buf, 1, n, out);
512			if (nlen > 0) {
513			nn += n;
514			if (nlen == nn)
515			break;
516			}
517			} while (eof == 0);
518
519			return 0;
520			}
521
522
523			/* Parse the HTTP response line. */
524			int
525			wHTTP::parseResponse (int *_statcode)
526			{
527			http_head_t n;
528			const char tmp, p;
529			char buf[300];
530			int code = 0, nn = 0;
531			int rc;
532
533			*_statcode = 0;
534			rc = readLine (buf, 299, 1, &nn, NULL);
535			if (rc)
536			return rc;
537
538			tmp = "HTTP/1.";
539			if (strlen (buf) < 8 \|\| strncmp (buf, tmp, strlen (tmp)))
540			return WPTERR_GENERAL;
541			p = buf;
542			p += strlen (tmp)+1 + 1; /* skip HTTP/1.x and WS */
543			*_statcode = atoi (p);
544			if (tmp == 0)
545			return WPTERR_GENERAL;
546			p += 3 + 1; /* number + WS */
547
548			if (code == HTTP_STAT_400 \|\|
549			code == HTTP_STAT_403 \|\|
550			code == HTTP_STAT_404 \|\|
551			code == HTTP_STAT_405)
552			return WPTERR_GENERAL;
553
554			while (resp_headers) {
555			n = resp_headers->next;
556			free (resp_headers);
557			resp_headers = n;
558			}
559			resp_headers = NULL;
560	twoaday	310	return parseHeaders (&resp_headers);
561	twoaday	181	}
562
563
564	twoaday	308	/* Release all used structures. */
565			void
566	twoaday	310	wHTTP::releaseHeaders (void)
567	twoaday	181	{
568			http_head_t h;
569
570	twoaday	310	while (resp_headers != NULL) {
571	twoaday	181	h = resp_headers->next;
572			free (resp_headers);
573			resp_headers = h;
574			}
575	twoaday	308	resp_headers = NULL;
576	twoaday	310	while (req_headers != NULL) {
577	twoaday	181	h = req_headers->next;
578			free (req_headers);
579			req_headers = h;
580			}
581	twoaday	308	req_headers = NULL;
582			}
583
584
585			/* Destroy HTTP object. */
586			wHTTP::~wHTTP (void)
587			{
588	twoaday	310	releaseHeaders();
589			safe_free (host);
590			safe_free (url);
591	twoaday	200	if (fd != 0) {
592	twoaday	181	closesocket (fd);
593	twoaday	200	fd = 0;
594			}
595	twoaday	181	}
596
597
598	twoaday	200	/* Read @buflen bytes from the http stream into the buffer @buf. */
599	twoaday	181	int
600			wHTTP::read (void *buf, unsigned int buflen)
601			{
602			int n;
603
604			if (this->fd == 0 \|\| this->resp_headers == NULL)
605			return -1;
606			if (method != HTTP_GET)
607			return -1;
608
609			if (nleft == -1)
610			nleft = getContentLength ();
611			if ((int)buflen > nleft)
612			buflen = nleft;
613			if (nleft == 0)
614			return -1;
615
616			n = recv (fd, (char*)buf, (int)buflen, 0);
617			if (n > 0) {
618			nleft -= n;
619			if (nleft < 0) nleft = 0;
620			}
621			return n;
622			}
623
624
625	twoaday	200	/* Write the buffer @buf to the http stream. */
626	twoaday	181	int
627			wHTTP::write (const void *buf, unsigned buflen)
628			{
629			if (this->fd == 0)
630			return -1;
631			if (method == HTTP_GET \|\| method == HTTP_HEAD)
632			return -1;
633			return send (fd, (const char*)buf, (int)buflen, 0);
634			}
635	twoaday	200
636
637	twoaday	260	/* Return the Winsock specific error code. */
638	twoaday	200	int wHTTP::getErrorCode (void)
639			{
640			return error;
641			}